Multilayer structure that makes substrate for printing thereon and method of its fabrication

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer substrate 60 and method to produce a counterfeit-protected paper. Proposed substrate consists of the first paper interlayer (10, 202) with density varying from 10 to 80 g/m2 and second paper interlayer (20, 214) with density varying from 10 to 80 g/m2, and one layer of plastic made from thermosetting polymer materials arranged between aforesaid interlayers (10, 20, 202, 214) and bound therewith. Proposed method consists in that plastic layer, as-melted, is introduced between said paper interlayers (10, 20, 202, 214) for them to be squeezed between two rolls (50) in continuous process. Said two rolls 50 are kept at temperature exceeding room temperature but lower than that plastic material melt. Paper interlayers and plastic layer are bound together due to atomic-molecular forces between said layers to produce penetration zone wherein plastic layers are bound with fibrous material of aforesaid interlayers (10, 20, 202, 214). Plastic layer density varies from 22 to 80 g/m2.

EFFECT: better counterfeit protection, longer life.

38 cl, 5 ex, 3 tbl, 4 dwg

 

The technical field to which the invention relates.

Describes a multilayer substrate and a method of manufacturing such a multilayer substrate, which may find application in particular in the quality of printed material, such as a secure document. The multi-layer substrate comprises at least first paper tab, at least a second paper tab, and at least one layer of plastic placed between layers of paper and coupled with layers of paper, at least one thermoplastic polymeric material. The proposed planar substrate can be used, for example, as a printing material, in particular as a protected paper, but also as a packaging material, protective material, backing cards, etc.

The level of technology

The printed substrate for valuable documents, for example banknotes, referred to constantly improve the development in order to meet the constantly growing needs in the protection against counterfeiting. Especially interesting is the establishment of protection measures that are recognized by users in normal everyday life without the involvement of auxiliary means, but who can never be realized in a simple way. This characteristic is, for example, multicolor water is a sign, which is traditionally used in protected securities and approved as a standard.

In a continuous effort to create new substrate for banknotes along with well-known protected securities used are also alternative materials as a base material. For example, in Australia since 1988 were put into circulation banknotes, in which the polymeric film is printed substrate. Such polymer banknotes have in relation to classical banknotes paper-based advantages, such as higher tensile strength or higher resistance to contamination. However, as regards the protection against counterfeiting, in the case of polymer banknotes should be noted some significant disadvantages compared with banknotes from protected paper. In particular it is not possible to place these watermarks in these substrates. Other approved applied to paper substrates and recognized by consumers characteristics such as melange fiber, tablets or security threads cannot be implemented in polymer banknotes. Also there is no feeling to the touch and sound, typical for banknote paper-based, which often serve as a good criterion of authenticity of banknotes. The importance of tactile sensations in distinguishing between genuine and counterfeit Bank is otami was, for example, investigated the Bank of Canada and presented in SPIE Vol.5310, Optical Security and Counterfeit Deterrence Techniques V, Analysis of Counterfeits and Public Survey Results as Design Input, p.63 ff.

In order to combine the advantages of both substrates banknotes, has already been proposed a combination of both materials. So, for example, EP 0628408 describes a substrate consisting of a printed film, on which the two sides with an adhesive protected laminated paper. The purpose of these inventions is, among other things, to integrate between the two layers of additional security features, in particular in the form of print, and connect the two paper layers.

In WO 2004/028825 proposed design, which protected the paper on its surface provided with a film. In one possible form of execution between the two films is provided by paper tape with punched holes window type. The purpose of this invention is that in this way on both sides to protect the paper surface from contamination.

Polymer notes have along with the aforementioned enhanced durability compared to traditional paper banknotes also the opportunity for additional protection against counterfeiting, which cannot be implemented in the event of a classic paper substrates. Targeted incomplete print or lack of it in certain areas of the substrate results in the creation of transparent areas (called Windows), which are considered as very effective protection against the most simple and widely used methods of copying. These peepholes are signs of a "first stage", in which by definition the user can verify without the need for additional devices. Because the validation of the observation window can be made especially in a covert manner and sometimes even unconsciously, that this feature is fundamentally considered by many Central banks as extremely effective. Transparent areas also opened the possibility of using the security features of the new type, which to perform their function needs to be a transparent base material.

However, the substrate, which in some cases are banknotes with observation Windows, security has important disadvantages. Typical feeling to the touch and the rustle of banknotes on a paper basis - often the most important properties for the detection of counterfeit currency is completely absent and cannot be given to them.

Appreciate and known to users and is still extremely robust watermark cannot be implemented in a polymeric substrates and can be recreated printed only in poor quality; this is a controversial decision, as simulated by printing water C the AKAM usually detected counterfeit banknotes. Other well known community security features, such as security threads and heathered fiber, also can not be implemented in polymeric substrates, unless it can be given printed in unsatisfactory and, as mentioned above, questionable for the printing method.

Following the disadvantage of polymer banknotes should consider that they can not be closed properly, as they spontaneously straightened. When the persistent attempt to minimize polymer banknote fold is created, which is not smoothed. In the area of the bend edges usually disappears print, and because of the use of banknotes in their typical treatment quickly erased printing ink. The following deficiency should be considered that in the case of a polymeric substrate in certain cases we are talking about the stretched polypropylene, a material that is used in countless products for everyday use, such as packing tape, transparent tape, sealing tape and other such qualities, and thus easily accessible to potential forger. The fact that in case the substrate used we are talking about a stretched film, is manifested negatively in particular when the substrate is exposed to elevated temperatures, as they are likely Oshikoto in daily life. Near hot plate or under a halogen lamp may occur shrinkage of such polymer banknotes.

For all these reasons, the banknotes on polymer substrates up to this time has not gained much importance and were partially even after a short time after their successful introduction into circulation again replaced by classic banknotes based on a paper backing.

In striving to implement without these disadvantages and valuable - as a sign of protection is highly appreciated by the viewing window were undertaken various efforts to obtain such an inspection window in a paper backing.

So, for example, DE 4334848 paper describes the basis perforated window-type, which is closed by a protective film.

Another application is described in WO 03/085193. There is protective tape in the molding process of the paper so embedded in the protected paper that valuable document formed transparent cutouts. In both applications it is common ground that the observation window can be implemented in only one specific area of the strip, which is obtained by filing a protective film or protective tape in the direction of motion. In these areas the substrate is different from other areas in thickness and mechanical properties that can prevent both during processing and during use.

Another application pursues WO 2004/076198 that op is saweet multilayer laminate of paper tabs and tabs of the film, in which the paper tab in the preferred form of execution have end-to-end cuts, resulting in a laminate arise desired viewing window. The advantage of this layered design is that the observation window can be implemented in the document at any place and in any quantity. Connection paper tabs and film occurs in the lamination process, which expressly waive any kind of adhesive. In this proposal we are talking about technologically elegant application, which, however, under certain circumstances conceals certain economic and technological difficulties. In particular, due process requires heating the paper tabs above the softening temperature of the polymer film is under certain circumstances detrimental to the properties of the product. Paper tab when this process is severely dehydrated, prone to yellowing or even to pergamenshchik that may adversely affect the optical properties (hue, opacity)and mechanical properties (embrittlement, number of double folds). As a further disadvantage of this process you should consider the fact that in case of perforation in two paper tabs, in which the polymeric film is freely available on one or both SRT is he thereby formed or unilaterally blocked, or completely transparent viewing window, a polymer film is heated to the same temperature as the remainder of the complex. At this temperature there is usually an increased wettability of the polymer, so that the paper tab sufficiently impregnated with the formation of the penetration zone. Under these conditions, the polymer has, of course, also increased affinity for hardware components (rollers, the carrier tape laminator, which have the same or even a higher temperature than the temperature of the polymer, which may lead to adhesion of the polymer film on the details of the apparatus and to the formation of possible surface structures.

Disclosure of inventions

The basis of the invention is to provide improved compared with the prior art printing material, in particular for use as a protected paper, and the method of its manufacture. Specifically the idea is to provide a multilayer substrate and method of manufacturing the multi-layer substrate includes at least first paper tab, at least a second paper tab, and at least one placed between the paper tabs and connected with these paper tabs plastic layer of the at least one thermoplastic polymeric material. Prefer the LNO we are talking about to create a multilayer substrate and method of manufacturing the multi-layer substrate includes at least first paper tab, at least a second paper tab, and at least one is located between the paper tabs and connected with paper tabs of the plastic layer of the at least one thermoplastic polymeric material, and at least one of the paper tab has through the perforation, which on the whole surface covered with a layer of plastic.

The solution to this problem is achieved in that the layer of plastic in the molten state is introduced between the paper tab, paper tab, then compressed between a pair of rollers in a continuous process, forming a connection due to atomic-molecular forces between the paper tabs and a plastic layer with the formation of the penetration zone, in which part of the layer of plastic is connected to the mass of the fiber complex paper tabs, and a layer of plastic has a density of more than 20 g/m2and as high as 100 g/m2.

The idea of the invention consists, therefore, is to place a layer of plastic between two paper layers so that could be created a deep connection between the paper layers without using adhesives, since the latter circumstance is often the be a disadvantage in the matter of protection (glued laminates can be unpicked on the adhesive layer). In a further layer of plastic should adopt a stabilizing and carrier function, that is, the plastic layer serves not only as a clutch between the two paper layers, but also enhances the multi-layer substrate as a whole. This means that, for example, number of double bends sharply increased compared to pure paper substrates and thus achieved the multilayer substrate, which is substantially longer, even with intensive use. This is possible due to the density of the layer of plastic over 20 g/m2. In order, however, to have numerophobia tactile properties, the plastic layer should have a density of not more than 100 g/m2.

From a completely different region known that multilayer laminates of paper with an inner polymer layer can also be obtained in such a way that the polymer in molten form in the process of extrusion coating between two paper tabs. Such a solution is described, for example, in the patent document US 2002/0176973 A1. In this text from another technical field described laminate with improved dimensional stability under fluctuating humidity, consisting of two paper tabs with the internal tab of the polymer, but the tab of the polymer in each case is made thicker than each of the paper tabs.

Because this example is relative to the camping to a different technical field, the properties of the product are significantly different from the properties, to which the present invention is directed. For example, do not apply to protected paper, especially any paper with watermarks, which by their mechanical characteristics, as well as optical and tactile properties differ significantly from those used in the US 2002/0176973 A1 Kraft paper and pigment securities. Further, in the case of the preferred polymers in US 2002/0176973 A1 we are talking about the polyolefins, which because of their hydrophobic nature have a lower affinity for paper. Accordingly, the polymer does not penetrate into the paper tab (see US 2002/0176973 A1, section 0040 and figure 1/figure 2), i.e. the penetration zone in the sense of the present invention, without a doubt, will not be formed in US 2002/0176973 A1. The formation of the penetration zone, in which the polymer is at least partially penetrates into the fiber complex paper tab, however, is the essential feature of the present invention and extremely important in protective functions. This is achieved among other things by the control rollers of the laminator, which in contrast to the document of the prior art US 2002/0176973 A1 cooled to a temperature of 15-30°C (cf. US2002/0176973 A1, section 0046).

In contrast to the present invention, the purpose of which is a multilayer substrate, which in their tactile is waistbag little different from the usual protected paper, in the case of US 2002/0176973 A1 in accordance with the invention is achieved by a complex (i.e. combined material), which is due to the relatively thick intermediate tab of the polymer stiffer and harder than ordinary paper such density.

According to the first preferred form of execution layer of plastic has a density of 25-80 g/m2. Particularly preferred density of 25-40 g/m2. The latter range is extremely advantageous because, on the one hand, guaranteed sufficient supporting and stabilizing function of the layer of plastic, and at the same time (for example, when using two identical paper tabs density of 20-50 g/m2) achieved tactile characteristics, which hardly differ from those for normal paper with the corresponding full density in the range of 70-120 g/m2.

According to another preferred form of execution of at least one, preferably both paper tabs can be performed in the middle of the same thickness, or more preferably thicker than the tab of the plastic. So can be guaranteed - among other things - tactile properties that are similar to a paper substrate, for example with the protected paper.

Another preferred form of execution is marked by the fact that there are so-called open or at least the participants and, in which the plastic layer is open. For this purpose, at least one of the paper tab has in some areas at least one through-cutout. The right window can be made if both paper tabs are through cuts, and these cuts are combined with the register in such a way that at least some sections are formed viewing window, and these peepholes mostly at least transmit the light or particularly preferably fully transparent. Additionally or simultaneously it is also possible that both paper tabs are through cuts and these cuts are combined with the register in such a way that at least some sections are formed region in which the layer of plastic is only open from one side. Here too, the plastic layer at least on the visible areas preferred way passes light or transparent.

The use of the above-density paper tabs and plastic layer enables, for example, thereby to produce a stable and transparent window. However, it is also possible to provide, in such Windows security features, or the like, and there is no need to do so that Windows are fully transparent. For example, perhaps in the layer of plastic to provide (fluorescent) dyes or the like. Preferably, however, the button in the case of thermoplastic polymer material layer of plastic it was about transparent material.

Regarding the layers of plastic material, as appropriate showed itself, for example, the following materials: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), soft polyvinyl chloride (PVC-P), polystyrene (PS), polyester, copolyester, polycarbonate (PC), polymethylmethacrylate (emission spectra obtained for pure), Polyoxymethylene (RUM), polyethylene terephthalate (PET), polyetheretherketone (PEEK), polyamide (PA).

In the case of the preferred polyamide particularly suitable polyamide 6 (RA) or polyamide 12 (RA), and among other things, the preferred amorphous form. Further possible mixtures or copolymers of these polymers. Preferred, for example, amorphous copolyamide, preferably based on RA.

According to the following preferred form of execution of thermoplastic polymeric material plastic layer has a transition temperature in the glassy state Tgand/or melting temperature Tmabove 0°C, preferably above 40°C. With such materials it is possible to work, for example, for extrusion with a melting point in the range of 250-350°C, and preferably this temperature is adjusted at the outlet of a slit nozzle. It was found that it is preferable to extrusion with a viscosity in the range of 50-1200 PA·s, especially in the range of 500-1000 PA·S.

This method can be performed when the speed of the process more than 70 m/min, especially predpochtitelno more than 100 m/min In other words, it is possible to significantly higher production speeds than can be achieved by the lamination process.

To be able to optimally configure the zone of penetration without any damage to the paper tabs, proved to be expedient for at least one, and preferably both paper tabs to heat mainly immediately before the input layer of plastic. The preferred way, it is entirely converted to a layer of plastic side of the paper tape. Heating may be achieved using nozzles hot air and/or infrared emitters, and/or terminal, and/or by means of the heating table using one or more heated (calender) rollers.

According to another preferred form of execution between a pair of rollers immediately after the input layer plastic extrusion line pressure is applied 0-500 N/cm, in the ideal case 250-450 N/a see If this is the preferred way pair of rollers is kept under a temperature above room temperature. However, in the ideal case, the temperature of the rollers must not lie well above the melting temperature or above the temperature of transition to the glassy state of the material used in the layer of plastic. Accordingly, it has been the predominant supports the th temperature of the roller pairs in the range of 50-100°C, the preferred manner in the range of 60-80°C. it is Preferable to select a temperature slightly below the temperature of transition to the glassy state Tgand/or the melting temperature Tmapplied materials plastic layer. Under certain circumstances it may be preferable to select the temperature of the rollers above the temperature of transition to the glassy state of the materials used layers of plastic. Especially amorphous materials have usually falling sharply with decreasing temperature characteristic viscosity of the melt, so that sufficient penetration may require temperatures of rollers above Tg. For example, for polnomochnogo copolyamid 12 with Tg=155°C as the optimum was detected temperature of the platens from Tg-45 to Tg-25 (about 110-130°C), and for partially crystalline copolyamid 12 with Tm=178°C is the temperature of the platens from Tm-105 to Tm-90 (about 75-90°C). Depending on the material the ideal temperature of the rollers can also be other that in case of necessity requires to maintain the temperature of platens with maintaining the oil temperature, whereupon the temperature of the rollers can reach 180°C.

This method is the preferred way is configured in such a way that the penetration zone have an average thickness in the range of 5-30 μm, particularly preferably in the range of 10-20 microns.

Particularly smooth and thus, with regard to transparency, optimal surface, especially on the Windows, can be achieved in the case when the rollers will be used steel rollers, polished to a high degree of smoothness. Rollers can be additionally equipped antiscaling properties that favors Otopeni Windows from the roller. We mean, for example, the surface of polytetrafluorethylene (PTFE), Teflon surface, the surface of the chromium or chromium steel with embedded particles of polytetrafluoroethylene (also known under the brand name TeFlok), the silicon surface, the surface of polyimide, etc. can be advantageous if one or both of the roller will have a ductile surface. This achieves a more uniform distribution of pressure across the entire width of the tape. This can be an advantage especially when one or both of the paper tape are through cuts in the plots are due to missing material rollers may be less pressure. Ductile rollers can compensate for this pressure difference that gives better traction in these areas. In the case of such rollers we are talking about, for example, rubber rollers with PTFE-coating or PTFE-lined or rollers with silicon is the second application.

As noted above, the plastic layer can be integrated with the security features or combination of security features. It is possible, for example, the following: melange fiber, tablets, metal fiber, a marking substance, infrared or ultraviolet dyes, protective pigments, fluorescent dyes, effective pigments or security threads, and these security features are added as additives to the polymer mixture or melt, or are near the slit of the roller, or forced on melting granko, or in the case of security threads are introduced into the roller gap.

In the same way, perhaps the preferred way to provide the security features in the paper tabs. In addition, these security features can only be placed in one paper tab, or, for example, in both paper tabs can be used in a variety of security features. So, without further modification may apply the security features already known from the field of paper as a substrate for banknotes. As a sign of protection for paper tabs may, for example, apply the following: watermarks, especially watermarks grayscale, security thread, elements with variable optical properties (OVD), melange fiber, protective pigments, iridescent color patterns, circuits, and in particular m is crochety with radio frequency identifiers (RFID chip), magnetic strip.

Especially if should be made open and they should have opportunities homogeneous surface, according to the following form of the application of the molten polymer layer can occur crevice nozzle, which is in direct contact with the paper tab. Alternative or additionally it is possible to ensure the application of the molten polymer layer with a corrugated roller, a screen printing roller or rolling of the roller, in particular with the application of three-roller system.

It is preferable to form the layer of plastic over the entire surface, primarily through the entire surface of both paper tabs. However, it is also possible to place a layer of plastic sections or strips and/or perform the layer of plastic sections or strips of different thickness.

Extrusion can occur on the basis of simple melt, but the alternative is also possible as a material layer of plastic to use prepolymer, the dispersion of the polymer or polymer solution, which is in connection with paper tabs either at the point of connection with them chemically or physically hardens, and/or reacts, and/or drying and/or zastupnevich.

Further, the present invention relates to a multilayer substrate that can be manufactured is Olena one of the methods mentioned above or which is actually made by using one of the methods described above.

Such multilayer substrate differs preferred due to the fact that at least one of the paper tab has at least one through-cut in some areas, and these preferably both paper tabs are through cuts and these cuts are combined with the register in such a way that at least some sections are formed viewing window and that in the region of the edges of the cutouts are flattening, i.e. that the transition from paper to polymer have a lower height of the edges than the thickness of the paper (cf. also figure 3).

In the preferred embodiment of this form of execution is reduced cuts both paper tabs differ from each other in shape and/or size, so it's a viewing window, which is characterized by the edge region, which is only one side covered with a paper tab. This form of execution is preferred for reasons of protection against counterfeiting, as it makes the multilayered structure is visible, which cannot be achieved by using a single paper tab.

A particularly preferred form of execution is characterized by the fact that the two paper tabs are through cuts and these cuts are combined with the register in such a way that at least some sections are formed viewing window and/or areas in which the layer of plastic open is on one side only, moreover, the plastic layer has at least one sign of protection in the form of a security thread, and the security thread is inserted into the slot of the roller, and the security thread is visible in the viewing window and/or in areas in the final multilayer substrate in direct view. Especially preferred are those areas in which the layer of plastic is only open on one side and located so placed preferably in the direction of the protective thread alternately on the upper and lower sides of the protected substrate, resulting in a security thread is visible as a windowed thread" on both sides for direct viewing. Such multilayer substrate has a significantly higher protection against counterfeiting, in particular in combination with a special protective threads, which have, for example, fluorescent, and/or polarized, and/or conductive characteristics.

As mentioned above, in the case of thermoplastic polymer material layer of plastic it is especially transparent material, and in the area of the observation window they are highly transparent and have a smooth surface. In the case of layers of plastic material we are talking about is preferably amorphous polyamide preferably with a transition temperature in the glassy state is above 20°C., particularly preferred polyamide 12 and/or amorphous copolyamide 12. The paper layers are dense is here in the range of 5-500 g/m 2, preferably in the range of 10-80 g/m2especially preferably in the range of 20-40 g/m2. According to a preferred form of execution in the case of at least one paper tab it comes to protected paper. According to the following preferred form of execution of at least one paper tab has a watermark. Paper can be, for example, made on kruglosutochno paper machine or on clinocerinae paper machine.

The multilayer substrate is the preferred form of execution, the number of double folds, which is significantly higher than that in the conventional paper basics, i.e. the number of double bends her over 1800, in particular more than 5,000.

Further the present invention relates to the use of such a multilayer substrate as a protective material, packaging material, material for cards, secured paper, in particular as banknotes, checks, tickets, certificates, shares, bonds, certificates, licenses, permits.

Further preferred form of execution of the method, the multilayer substrate and its application are described in the dependent claims.

Brief description of drawings

The invention will be further explained in more detail with examples, run in conjunction with the black, the hedgehogs are:

figure 1 - schematic of the manufacturing process of the invention a multilayer composite material by applying a melt through the extrusion;

figure 2 is a cross section made so multi-layered substrate;

figure 3 - snapshot through the microscope of the cross section of the invention the multilayer composite material with translucent (closed from one side of the paper) window;

4 is a diagram of a complete installation for the manufacture of the invention a multilayer composite material.

The implementation of the invention

The object of the present invention is to eliminate these disadvantages in the manufacture of multilayer laminate and the ensuing mentioned disadvantages of the properties of the product when using plastic film by the refusal of the lamination process, as proposed in WO 2004/076198, but instead is made of a multilayer substrate 60, based on the first paper tab 10 and the second paper tab 20 and the polymer 80 so that the polymer is already in the molten form is applied in the form of a polymer melt 30.

Therefore, the present invention concerns a process in which the technology of extrusion of thin films transferred on the application of the coating (layer), which at first is may be formed of a multilayer composite material which consists of paper tabs (at least one of them from a protected securities), which, for example, have through the perforation, which without the use of pre-manufactured film is completely blocked planoaren polymer layer.

Thus, there is no deformation of the flat film is expensive compared laminating known state of the art, as well as difficult, associated with a large waste of time and harmful to paper fusing film by direct contact with paper tapes. Instead, as shown in figure 1, the polymer granules melts in the extruder, fed and extruded through a slit head 40 directly in the molten phase in the form of a polymer melt 30 on the paper tab or between paper tabs, which, for example, served with rollers. The notion of a molten phase means in this context, the shape of the state of the polymer, which is characterized by increased deformability or lower viscosity. The viscosity of this lies within the range acceptable for polymer processing, in particular for the manufacture of flat films obtained by extrusion, between 20 and 2000 PA·s, preferably in the range from 50 to 1000 PA·s, in particular in the range between 75 and 500 PA·S. When this is not essential, whether in the case of polymer p is alloy talking about the polymer with a specific melting temperature T mor with a certain interval of melting Tm±ΔT at a temperature above the melting temperature Tmor are you talking about the polymer without definite melting point, which is so strongly heated above the temperature of transition to the glassy state Tgthat the viscosity of the material is reduced so that treatment can be offered. Polymers that fall within the first class are, for example, semi-crystalline polymers, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide 6 (RA), polyamide 12 (RA), partially crystalline copolyamids and partially crystalline copolyester. Polymers that fall into the second class are, for example, amorphous polymers, such as polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (emission spectra obtained for pure), but also amorphous copolyamids (for example, on the basis of RA) and amorphous copolyester, as they, for example, are manufactured by the company Ems (EMS Chemie, Domat-Ems, Switzerland).

Some examples of polymers with defined melting temperature and without those, which are particularly suitable for applications that are listed in the following table.

Tm
Table 1
PolymerTg
Polyethylene (PE)from 110 to -90°C135°C
Polypropylene (PP)-10°C175°C
Polyvinyl chloride (PVC)from 50 to 90°C-
Polystyrene (PS)100°C-
Polycarbonate (PC)150°C-
Polymethylmethacrylate (emission spectra obtained for pure)105°C-
Polyoxymethylene (RUM)125°C175°C
The polyethylene terephthalate (PET)70°C265°C
Polyetheretherketon (PEEK)145°C335°C
Polyamide 6 (R)50°C215°C
Polyamide 12 (R)45°C178°C
Part of the but crystalline copolyamide L25, Ems45°C178°C
Partially crystalline copolyamide L16, Ems50°C178°C
Amorphous copolyamide G21, Ems125°C-
Amorphous copolyamide TR90, Ems155°C-

Preferred materials for the implementation of application are in particular polymers of the class of polyamides. Because of their chemical structure, they have a particularly high affinity for paper. The reason for this fact is the formation of hydrogen bridges between the amide groups of the polyamide and the polar groups of the cellulose fibers of the paper. The multilayer substrate of these preferred materials paper differs therefore particularly deep complex, which occurs, on the one hand, from good connections due to atomic-molecular forces and, on the other hand, the good compatibility of the individual components. Deep connection due to atomic-molecular forces may be due to the good wettability of the paper fibers with the polymeric melt. The following polymer class is Orosei wettability and also resulting in composite materials with a deep connection due to atomic-molecular forces, are polyesters. If necessary, a sufficient connection due to atomic-molecular forces can be achieved with polymers that do not have mentioned the possibility of formation of hydrogen bridges, for example, polyolefins such as polyethylene or polypropylene.

Further preferred properties of the polymer material for the invention of the substrate are high chemical resistance to acids, bases, solvents, bleaches, etc., high thermal stability, high resistance to UV rays, high transparency, high fatigue strength in bending for the alternating cycle, high softening temperature. In this respect, the polyamides are particularly suitable, for example polyamide RA or copolyamids on this basis.

Since the polymer in the sense of the invention directly gets in molten form onto the paper, thermal impact of paper falls for a short time and therefore virtually no harm. You can work at relatively high temperatures of the melt in the range of 300-350°C, which when laminating would be either inapplicable, or, as a rule, would lead to irreversible damage to the paper. This has the advantage that due to the high temperature of the melt can be achieved with a lower melt viscosity than is achieved easy and quick penetration into the paper and more tight grip, required to secure the substrate. At the same time permitted a high-speed process. Installation for coating extrusion coating can therefore also be employed without problems with the process speed of up to 500 m/min, while the belt presses for laminating using plastic films are usually not faster than about 50 m/min In case of using a belt press or a roller laminator for manufacturing a multilayer substrate with a polymer film, the working temperature is limited to about 200°C, because otherwise the paper is irreversibly damaged. At these temperatures is not achieved sufficient connection with the preferred materials, what is required for such a product. However, in the case of applying units for applying extrusion coating the desired connection of the same materials possible, as the hot liquid melt can penetrate deep enough into the surface of the paper, not heating the paper to harmful temperatures.

The melt viscosity at a given temperature depends indirectly on the shear rate, which gives another opportunity to configure processing options and simplifies the management process, particularly at high production speeds.

Another advantage predlojeno is on the way is that made so the combined material can be achieved with a considerably smaller thickness of the layer of polymer than is possible when laminating a polymer film. Due to the fact that in the invention method, the polymer in molten form directly adopted one of the reference paper, can be achieved much more subtle, but still carrying and supporting layers. This is especially for multi-layer polymer coating, which can be done by using multiple extruders and one of the corresponding multi-layer tool from the same slotted head. Appropriate devices can be borrowed from the extrusion technology, in particular from the field of extrusion flat film.

Another advantage offered by the invention extrusion process lies in the flexibility in relation to variations to be processed polymer. Material changes are possible within the shortest time, which makes it attractive also and production of small batches. In addition to the polymer granulate simple way before extrusion can be added marking substances, dyes, protected pigments, fluorescent dyes, effective pigments, interference pigments, metal pigments, reactive dyes is whether, ultraviolet absorbents, stabilizers and other additives is preferably in the form of masterbatches, which allows to reach easy customization and further protection of the product.

The main difficulty in the manufacture of the desired product lies in the formation of transparent, proportionate Windows. Typically the substrate, which caliroots polymers installations for the application of extrusion coating, have no end-to-end perforation. Named from the prior art documents as a consequence, also do not use paper tapes having perforations, in which in the process of extrusion coating would be formed viewing window covered with a polymer. Installation for coating extrusion coating for the manufacture of paper composite materials are usually constructed so that the paper is on the rough temperature-controlled or chilled steel roller, and the second paper tape supplied with clamping roller, lined with rubber, compressed first steel roller, and the polymer melt is extruded in the resulting gap roller. This takes place in particular in the above-mentioned document US 2002/0176973 A1 where explicitly applied materials cushion of rubber or other materials such as ductility, and rubber. This configuration experience does not allow formation of a transparent with amarneh Windows in the area of cut paper strips. The rough surface of the temperature-controlled roller pairs is transferred to the molten polymer, which is on the opposite side strongly linked with a pressing roller made of rubber. The temperature-controlled cooling roller pairs is much lower than the temperature of solidification of the polymer may slightly lower the rubber grip on the shaft, but a certain swelling of the Windows, however, cannot be prevented, just slightly achieved a smooth surface required for sufficient transparency.

The object of the invention is inter alia to choose the design, which as a pair of rollers 50 selected two polished to a high degree of smoothness temperature-controlled steel roller. This configuration is for a thin, low-volume composite materials, as in the present case are not known. Installation for coating extrusion coating, working with two steel rollers (instead of one steel roller and one rubber roller), in any case, are used for processing voluminous, thick materials, such as, for example, non-woven material. Non-conventional for the production of thin composite material of paper-based choice in favor of two steel rollers, polished to a high degree of smoothness, promotes the formation of mirror GLA is fir, proportional, high-transparent inspection Windows with the quality of the extruded flat film.

Cooling of the melt is in contact with the rollers fast enough to substantially prevent the crystallization of the polymer. The temperature of the rollers is selected - as opposed to the temperature of the rollers in a laminator is lower than the softening temperature of the polymer, which greatly hinders the adhesion of the polymer on the platen. However, at the interface of polymer and paper creates a tight connection due to the formation of the penetration zone, in which the polymer is at least partially covers the fiber complex paper. The reason for this is, presumably, in a certain insulating effect of the paper, which has deep conductivity. In contact with the paper tape polymer melt is cooled so relatively slowly, so that it can sufficiently deep to penetrate the surface of the paper up until hardens. The advantage here is the fact that the penetrating melt with increasing depth of penetration gets closer to the cooler surface of the roller, thereby the heat is faster and as a result, the melt solidifies faster than the deeper he penetrates into the paper. This self-regulating mechanism can be is used in in order to accurately adjust the depth of penetration of the polymer and to prevent full penetration of the polymer to the surface of the paper. In contrast, the process of laminating hot press or roller laminator the highest temperatures are found on the outer side of the laminate, so that the polymer film becomes more wettable than the deeper it penetrates into the paper tab. On the other hand, the lowest temperatures are found in the center of the laminate, where should be the connection of polymer and paper. Made so the product tends, on the one hand, to be on the surface of the seats with full penetration of the polymer, and on the other hand, have poor adhesion. These deficiencies are described on the level of technology options laminate complicating effect on the product, which has a viewing window. Polymer film in exposed areas experiencing in the process of laminating the highest temperature that it moves on details, and consequently will be more wettable than the polymer film lying within the paper industry. This leads, on the one hand, to the fact that the Windows are molded surface structure details, and on the other hand, the separation of these wettable adhesive window with details is hardly possible without strain.

The present invention is osnovyvaetsja as a consequence, among other things, unexpected output, what polymer melt can ekstrudirovaniya from a slit nozzle directly into the gap between two temperature-controlled rollers, on which, for example, running paper tape provided through openings 90 (cf. figure 2), and thereby can form a multi-layered complex (composite material), which has as highly transparent viewing Windows 100 and a magnificent combination of the individual tabs to each other through the formation of the penetration zone 120.

As a pair of rollers 50 at a time, choosing preferably two steel roller, polished to a high degree of smoothness, and the temperature of the pair of rollers is preferably configured so that the polymer melt in the areas where it is in direct contact with the rollers, quickly cooled to a sufficiently low temperature so that substantially prevents the adhesion on the surface of the roller, and on the other hand, in areas where the polymer melt is in contact with paper tabs, the polymer melt is kept sufficiently moderate viscosity to sufficiently during the formation of the penetration zone 120 to penetrate into the paper tab to to make possible a tight grip.

Presumably, this process benefits the fact that the melt by direct contact with a temperature controlled surface is rnostly roller hardens faster compared with the as if she was separated paper tab from the roller surface, resulting in a slower cooling due to certain chemical actions paper tab. Preferably selects the roller temperature just below the softening temperature of the polymer in contact with the platen, so that the polymer is in direct contact with the platen immediately hardens to a solid enough film in the areas in which the polymer is separated from the roll paper tab, but the temperature of the polymer is still some time above the softening temperature to allow sufficient penetration into the paper tab. In this regard, it may be advantageous to pre-heat the paper before entering the polymer melt. This may occur, for example, using infrared emitters, but also using nozzles hot air. Alternative paper tape can be stretched through thermal channel or through the heating table or wrapped around one or more heated rollers, in particular a heated calender rollers. Mainly lie within the combined material is paper surface is heated or brought to a higher temperature is stronger than the side facing the polymer layer. This occurs, for example, automatically is when using infrared heating emitter, which is sent to the paper surface lying inside the composite material.

Additionally or alternatively to this it is possible to promote the penetration of the polymer melt in the surface of the paper and/or polymer adhesion, pre-prepared paper. Best may be amplifiers clutch, which improve the wettability of paper polymer melt, as well as primers (first coating layer), which further react with one or both components. Possible additives that can be added to the pulp, or by means of adhesive, for example, delivered to a size press, or to be spread are as an example, dispersions and/or emulsions of polymers, in particular amphiphilic polymers. Specialists there are also other means of preliminary preparation, the so-called primers. Such additives offers, for example, Trüb Emulsions Chemie AG, Ramsen, Switzerland, specifically for extrusion coating of paper. In the future, the paper can be activated surface to improve adhesion with the effects of corona discharge, exposure to ozone, exposure to flame, and others known in the art methods.

The penetration of the polymer into the paper tab is additionally simplified by the fact that the film of the melt in contact with the paper VK is adcoy is under high pressure in comparison with direct contact with the platen. For both these reasons, it becomes possible to sufficiently deep penetration of the melt into the paper tab and thereby the formation zone 120 penetration required for internal clutch, also at high speeds the process. Another positive effect of high pressure on the transition area through the perforation 90 is the fact that a certain flattening 70 edges around the perforations 90, resulting in a smooth transition between paper tab 10 and the viewing window 100. In contrast to the transition from sharp edges, which would, for example, when laminating paper tabs with continuous perforation film with an adhesive, in this case, significantly reduced the danger of inadvertent or deliberate destruction of the composite material when exposed to this edge.

When using the two provided through perforated paper tabs perforation lies the preferred manner at least in sections one above the other (composite input)to get at least parts fully transparent viewing window. Through the perforation must not necessarily be identical and/or with the same cover. In a preferred form of execution of at least one of the paper tab has the watermark 110.

The cross-section comprises the emnd invention of the substrate in the form of a picture through a microscope vertically to the level of the paper shown in figure 3. However, only one paper tab 10 is provided with perforations 90, so that the region 91 is formed in which the polymer tab with only one side open.

The installation, which makes the invention a multi-layer substrate, which consists of the first tab paper with watermarks 214 through cutouts to fit Vadnais signs, as well as from the paper tab 202 with cutouts to fit the cutouts of the first tab, and from the inner polymer layer, which in molten form extruded between the two paper tabs connected together with the same cover, provided with through perforations, shown schematically in figure 4. Elongated arrows indicate the transport of material, dashed arrows indicate data flow.

Paper tape 202 of the plain paper is fed from unwinding device 201 and first introduced through the device of a tension control 203 and the control unit edge of the tape 204. Further perforating node 205 are cut, and the cut sections are removed using extraction 206.

Paper tape 214 of paper with watermarks is served from the side with the help of unwinding device 212 and is entered using the control device edge of the tape 204 in the process. Behind is the reader of vodjani the labels 213, and again punching the site for the production of cut, combined with water marks.

In parallel to this layer is made of plastic or applied to this material so that the material is conveyed from the dryer 207 and, if necessary, mixed with other material, such as uterine mixture from the metering device 208 and through the extruder 209 is fed to the slit nozzle 211.

Both the paper tape 202/214 first heated on the side facing the layer of plastic, using infrared heating emitter 210 and then rolled into the gap between the two rollers 50 and simultaneously filling of plastic crevice nozzle 211. Made so multi-layered laminate is checked then at the end of the ribbon control 215 and marked if necessary, existing inkjet marking 216, served using tape drive/table for cutting 217 and in the end wound on the winding device 218.

In the preferred form as molten polymer is fed molten multilayer veil from different polymers. The preferred way the design of this multi-layered molten curtain symmetric, for example with an inner layer of a first polymer and with relevant external layers of the second polymer. The preferred way temperature is the softening of the outer polymer lies below, than that of the inner polymer, or an external polymer under given conditions processing has lower melt viscosity than the inner polymer. Thus, a suitable choice of the external polymer can be optimized connection with paper tabs or chemical resistance, while as an internal polymer can be selected material optimized for the education of Windows. The preferred way in this multilayer polymer layer we are talking about largely compatible polymers, such as various types of polyamides or different types of polyesters. However, it is possible to manufacture multilayer polymer layers of different not necessarily compatible polymer classes, for example a polymer layer with an inner core made of polyamide and an outer layer of polyolefin, for example polyethylene or polypropylene.

In principle, it can be beneficial after application of the polymer to promote multi-layer composite material for a certain period of further possible tangentially to the roller gap or at least before full cooling withdrawn from the curved surfaces of the roller and to move to a particular area on right, i.e. not on radius curved to facilitate the full solidification CL the I polymer in the final desired position of the multilayer composite material and to improve the flat substrate layer.

At least one layer in any case, a multilayer formed polymer layer may be added additives such as marking substances, dyes, infrared dyes, ultraviolet dyes, fluorescent dyes, substances with antisexism shift, protective pigments, effective pigments, interference pigments, metal pigments, etc.

The polymer layer may in some areas have increased thickness. It is possible using a segmented slit of the head of a particularly simple way in which individual segments of sponges revealed slightly stronger. Thus there is the possibility, for example, in the window area to increase the applied amount of the polymer and to obtain a more stable window. Also on the site of the bands, which, anyway, is the watermark, it may be advantageous to make an intermediate tab of the polymer is slightly thicker than in the neighbouring areas to compensate due to watermarks the difference in the thickness and simultaneously to obtain a wealth of contrasts watermark. Next, can thus be achieved tactile sign, as a consequence of the polymer layer, which in some areas is made thicker, is palpable thickening and increase the rigidity of the substrate at this site. Further useful Oka is Atisa, that area, which will later be attached to the edge of the protected documents, to do a bit thicker, especially since these parts are susceptible to wear and tear and increased polymer coating can favorably affect them.

Further, when the production process proposed by the invention is a multilayer substrate between tabs can be fixed additional material. For example, it is possible to run into the gap of the platen security thread, which is thus firmly udelyaetsya between the individual tabs. In the ideal case, the thread is provided with an adhesive (for protective thread is not unusual) and is conducted through a temperature-controlled platen so that the thread will already be connected with the paper tab at the expense of adhesive bonding, resulting in minimizing the risk of thread breakage at the entrance to the polymer melt. Security threads can actually be fixed by running them in the roller gap, even in cases in which the melting temperature of the material lies below the temperature of the mass of polymer melt at the exit of the slit nozzle. It was found that at relatively short contact times specified under the required speed of the process more than 25 m/min, the yarn does not melt. So, for example, successfully handled security threads of polyester, and security threads from monoaxially stretched polypropylene (MORR) when the IC is rastah 30 m/min and the melting temperature on the slit nozzle 325°C.

In a preferred form of execution of the thread is inserted through the window position, so that in the finished product the thread is visible in the window. This window can be transparent window, which arose from two placed one above the other perforations equal cover, also we can go and on a translucent window, which from one side is covered with paper and which arose from the perforation of a paper tab. In the first case, the security thread directly visible from both sides of the document, in the second case it is directly visible from only one side of the document, and on the reverse side is visible only in the light. Of course, in the same document can be located several Windows, in the case of translucent Windows overlap can lie on one, and on the other side of the combined material. In the latter case, with the use of security threads, which is carried out through a series of semi-transparent Windows, which are replaced by transparent hand, will be able to receive the document window thread that segment the image is visible as on the one hand, and on the other side of the document, and when the paper method of introducing window thread, on the contrary, the individual segments threads are only visible from one side of the document.

Further, it is permissible to print paper tabs at or before the time the processing on the side, lying in the multi-layer laminate, such as the er, a method of inkjet printing. Thus there is hidden in the document and in the ideal case an individual impression, which can be recognized only up to the light and cannot be reverse-engineered from the outside. Of course, permissible, and other printing methods that are not private or individual printing, variable during the process. Preferably the devices used for offset printing, which is a simple way can be synchronized with perforating node 205.

It is also possible during the process near the slit roller spraying, nabryzgivanii or inject substances such as, for example, heathered fiber, tablets, pigments, dyes, metal fibers, metal flakes, etc. This can happen for one or both paper tabs, alternatively or additionally also on the melting grant.

It is also possible during the process to file on paper tape or to bring on the media objects such as, for example, electronic oscillating circuits, transponders, electronic chips, chips with radio frequency identifiers (RFID chips), conductive patterns, such as, for example, printed, etched or printed coil or antenna, a metal plate, magnetic particles, etc.

In a preferred process, the application of p is fused polymer layer occurs through the "veil", which is extruded from a slit nozzle located at a certain distance from the surface of the paper.

Alternatively, the production of application of the molten polymer layer is slit nozzle being in direct contact to the paper tab. In this way, the ideal way can be achieved full completion of the perforation in the paper tab of the polymer, while the damage amount to another paper tab less.

In the next production version of the application of the molten polymer layer occurs using a rolling roller, for example with application of three-roller system, as they are known from the application technique. In alternative production version of the application of the molten polymer layer occurs through corrugated rollers, as they are known from the application technique. In another alternative of the production version of the application of the molten polymer layer occurs using stencil roller, as they are known from application technique.

The molten polymer layer may at least areas to be interrupted.

In the case of molten polymer layer we can talk about prepolymer, polymer dispersion or polymer solution, which is in connection with a paper tab or in connection with, not the chemically or physically hardens, and/or reacts, and/or drying.

Examples

Two temperature-controlled steel roller, polished to a high degree of smoothness, is held on one paper tape density of 35 g/m2which areas has the cut out areas. Steam roller was brought into contact with each other, so that both the paper tape were in contact with each other. In the roller gap of the slit nozzle is filled with a melt of an amorphous polyamide with a melting point of 300°C. the Applied amount is about 35 g/m2. Steam roller had a temperature of 75°C, and the process speed was 40 m/min In the formed multilayer complex (composite material)that in areas overlapping the cut out sections in the paper Windows of the polymer, and this property cannot be divided without being damaged. Windows have exceptional transparency and smooth surface. The process speed can be increased up to 70 m/min without changing the quality of the complex and Windows. The applied amount could be reduced to about 25 g/m2also without changing the quality of the complex and Windows. Were still obtained stable commensurate window.

Comparative example to example 1

Two paper tabs density of 35 g/m2which areas have the cut sections were processed together what those lying in the middle of a film thickness of approximately 35 μm from the same amorphous polyamide, as in example 1 on the tape media in the laminate. The temperature of the belt press was 280°C, the heated area had a length of about 1 m After the passage of the heated section of the laminate in a hot condition passed through a pair of calender rollers with a linear pressure of 2100 N/cm and then cooled. In order to achieve a sufficient connection, the speed of the process should not exceed 5 m/min At higher speeds the process finished laminate could be calaminarian simple way, at least by sections. In areas overlapping the cut sections of both paper tabs were formed closed film plots, which are clearly outlined against the fabric structure of the carrier tape. To avoid this structure, these areas were entered polished to a high degree of smoothness of the steel strip with thickness of 100 mm After successful lamination steel tape could not be separated from the polymer film without destroying the window.

Example 2

Similar to the configuration of example 1 was manufactured complex (composite material), and as the polymer in this case was chosen polyamide 12 (RA). The melting temperature was 300°C, the applied amount is about 45 g/m2. Steam roller had a temperature of 50-60°C, and the process speed up to 40 m/min In the formed multi-layer complex, is that in areas overlapping the cut out sections in the paper had Windows of the polymer and which could not be divided, not being damaged. The window had exceptional transparency and smooth surface. Because crystallization RA it was impossible to notice any haze.

Example 3

Similar to the configuration of example 2 was manufactured complex (composite material). Paper tab has been protected by paper watermarked grayscale. The melting temperature was 265°C, the damage ranged from 13 g/m2(example 3A) to 35 g/m2(example 3b). Steam roller had a temperature of 95°C, and the process speed was 40 m/min In the formed multi-layer complex, which in areas overlapping the cut out sections in the paper had Windows of the polymer and which could not be separated without being damaged. The window had exceptional transparency and smooth surface. Because crystallization RA it was impossible to notice any haze.

Example 4

Similar to the configuration of example 2 was manufactured complex (composite material). One paper tab has been protected by paper watermarked grayscale from kruglosutochno paper machine, another paper tab was paper from raw fibrous mass without watermark from clinocerinae paper machine.

Example 5

Ana is ogino configuration of example 1 was manufactured complex (composite material). Paper tab has been protected by paper watermarked grayscale. The melting temperature was 325°C, plotted the number ranged between 20-35 g/m2. Steam roller had a temperature of 125°C, and the process speed was 30 m/min In the formed multi-layer complex, which in areas overlapping the cut out sections in the paper had Windows of the polymer and which could not be separated without being damaged. The window had exceptional transparency and smooth surface.

The measured values

Comparison of some typical mechanical properties (average values measured longitudinally and transversely to the direction of movement of the paper tape, atmospheric conditions at test 23°C, 50% relative air humidity) multilayer composite material manufactured in the above examples, shown in the following table 2. Typical characteristics of example 3 and example 4 are shown in table 3. As a comparison, we used standard paper for banknotes (N paper).

Table 2
Normal protected paperExample 1 Comparative example to example 1Example 2
Density [g/m2]90106105116
Destructive force [N]80101125103
Destructive force raw [N]28616459
Blagorodnost [%]35605157
Tensile strength, test Elmendorf [mn]800108711701669
The number of double folds1800>50001623>5000
The process speed [m/min]-70540
Quality window-Smooth and highly transparentMatt and structuralSmooth and highly transparent
Yellowing paper tab-Not noticeableNoticeablyNot noticeable

Table 3
Example 3AExample 3bExample 4The standard BN-paper
Densityg/m21007910390
The proportion of polymer (L25)g/m23413350
Thicknessmcm9889106 116
Is Cobb absorbency*)g/m213/1314/1523/1240-70
Opacity%89919594
Podavlyayushee forcekPa400310360350
Destructive forcecross119123103110
longitudinal58416250
The number of double foldscross>6000**)>10000**)>6000**)2400
longitudinal>6000**) 1160>6000**)1800
Blagorodnost%65575745
Ash%4,25,26,24,1
Tensile strength, test Elmendorfcross11307001090860
longitudinal12309101150980
Quality windowSmooth and highly transparentSmooth and highly transparent--
Yellowingnononono
*) The measure of hygroscopicity. With lower values of reduced susceptibility to dirt
**) Test aborted

1. A method of manufacturing a multilayer substrate (60), in particular as printed media in the form of secured paper, and the substrate consists of at least the first paper tab (10, 202) with a density in the range of 10-80 g/m2at least the second paper tabs (20, 214) with a density in the range of 10-80 g/m2and at least one plastic layer (80) of at least one thermoplastic polymeric material located between the paper tabs (10, 20, 202, 214) and United with these paper tabs(10, 20, 202, 214), characterized in that the layer of plastic (80) in the molten state is injected between the paper tabs(10, 20, 202, 214), and then the paper tab (10, 20, 202, 214) squeeze between a pair of rollers (50) in a continuous process and a pair of rollers (50) support at a temperature above room temperature but below the temperature of the injected molten material used for the layer of plastic, and create a connection due to atomic-molecular forces between the paper tabs (10, 20, 202, 204) and a layer of plastic (80) with the formation of the penetration zone, in which part of the plastic layer is connected with the fibrous substance of the mother of the La paper tabs (10, 20, 202, 214), and the layer of plastic (80) has a density in the range 22-80 g/m2.

2. The method according to claim 1, characterized in that the plastic layer (80) is applied with a density of 25-40 g/m2.

3. The method according to claim 1, characterized in that at least one, preferably both paper tab (10, 20, 202, 214) have on average the same thickness, or preferably greater thickness than the tab of plastic (80).

4. The method according to claim 1, characterized in that at least one paper tab (10, 20, 202, 214) has at least in some sections one through-cut (90).

5. The method according to claim 4, characterized in that the two paper tabs (10, 20, 202, 214) are through cuts (90), and these cutouts (90) combine in register with the formation of at least some sections of the observation window (100), and these observation window (100) preferably transmit the light or particularly preferably fully transparent.

6. The method according to claim 4 or 5, characterized in that the two paper tabs (10, 20, 202, 214) are through cuts (90), and these cutouts (90) combine with register so that at least some sections are formed region (91), in which the plastic layer (80) is open only on one side.

7. The method according to one of claims 1 to 5, characterized in that thermoplastic polymer material layer of plastic (80) use a transparent material.

8. How about the efforts of one of claims 1 to 5, characterized in that thermoplastic polymer material layer of plastic (80) use polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), soft polyvinyl chloride (PVC-P), polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (emission spectra obtained for pure), Polyoxymethylene (RUM), polyethylene terephthalate (PET), polyester, copolyester, polyetheretherketon (PEEK), polyamide, especially nylon 6 (RA) or polyamide 12 (PA12), or amorphous copolyamide, preferably based on RA, or copolymers or mixtures.

9. The method according to one of claims 1 to 5, characterized in that thermoplastic polymer material layer of plastic (80) has a transition temperature in the glassy state above 0°C, preferably above 40°C.

10. The method according to one of claims 1 to 5, characterized in that the material of the plastic layer (80) is injected at the melting point, preferably at the outlet of a slit nozzle in the range of 250-350°C, preferably with a viscosity in the range of 50-1000 PA·s, particularly preferably in the range of 500-1000 PA·S.

11. The method according to one of claims 1 to 5, characterized in that the substrate is made with a process speed of more than 70 m/min, particularly preferably more than 100 m/min

12. The method according to claim 1, characterized in that between a pair of rollers (50) apply a linear pressure in the range of 0-500 N/cm, preferably in the range of 250-450 N/a see

13. The method according to claim 1, characterized in that pravalika (50) support at a temperature above room temperature, but below the melting temperature or below the temperature of transition to the glassy state of the material used for the layer of plastic.

14. The method according to claim 1, characterized in that a pair of rollers (50) support at a temperature T in the range T=50-100°C or T=50-180°C., preferably in the range of Tgto +50°C>T>Tg-50°C, preferably in the range of Tg+30°C>T>Tg-30°C, particularly preferably in the range of Tg>T>Tg-30°C or in the range T>Tm-150°C, preferably in the range of T>Tm-100°C, particularly preferably in the range of Tm>T>Tm-100°C.

15. The method according to one of claims 1 to 5, characterized in that the zone (120) penetration have an average thickness in the range of 5-30 μm, particularly preferably in the range of 10-20 microns.

16. The method according to claim 1, characterized in that at least one, preferably both of the roller (50) is made of steel and polished to a high degree of smoothness.

17. The method according to claim 1, characterized in that at least one, preferably both of the roller (50) have anti-adhesive properties.

18. The method according to claim 1, characterized in that at least one, preferably both of the roller (50) have a structured surface.

19. The method according to claim 1, characterized in that at least one, preferably both of the roller (50) is made of corrugated.

20. The method according to claim 1, characterized t is m, that at least one, preferably both of the roller (50) have a ductile surface.

21. The method according to one of claims 1 to 5, characterized in that at least one, preferably both paper tab (10, 20, 202, 214) is heated essentially immediately before the input layer of plastic (80), particularly preferably on the side facing the plastic layer (80), preferably using nozzles hot air and/or infrared emitters, and/or in thermal channel, and/or by means of a heating table, and/or through one or more heated (calender) rollers.

22. The method according to one of claims 1 to 5, characterized in that at least one of the paper tabs (10, 20, 202, 214) has at least one characteristic of the protection (110), preferably selected from the following group: watermarks, especially watermarks grayscale, security threads, elements with variable optical properties (OVD), melange fiber, protective pigments, iridescent color patterns, circuits, particularly circuits with radio frequency identifiers (RFID chips), transponders, magnetic stripes.

23. The method according to one of claims 1 to 5, characterized in that the layer of plastic (80) has at least one sign of protection, preferably selected from the following group: melange fiber, tablets, metal fiber, Mar is inovaciniu substances, infrared or ultraviolet dyes, protective pigments, fluorescent dyes, effective pigments, interference pigments, metal pigments, reactive dyes, ultraviolet absorbents, stabilizers, and these security features added to the melt as additives or spray near the slit roll.

24. The method according to one of claims 1 to 5, characterized in that the layer of plastic (80) has at least one sign of protection in the form of a security thread, and the security thread is introduced into the roller gap.

25. The method according to one of claims 1 to 5, characterized in that the two paper tabs (10, 20, 202, 214) are through cuts (90), and these cutouts (90) combine with register so that at least some sections form a viewing window (100) and/or region (91), in which the plastic layer (80) is open on one side only, and that the layer of plastic (80) has at least one sign of protection in the form of a security thread, with security thread enter in the roller gap, and the security thread is visible by direct view in the viewing Windows (100) and/or areas (91) in the final multilayer substrate (60), and particularly preferably region (91), in which the plastic layer (80) is open only on one side, is placed preferably in the direction of the protective thread alternately on the upper and lower sides of the multilayer podlog and (60), that the security thread is visible as a windowed thread" on both sides in direct view.

26. The method according to one of claims 1 to 5, characterized in that at least one characteristic of the protection is made read by machines.

27. The method according to one of claims 1 to 5, characterized in that the molten polymer layer is applied using a slit nozzle (40), which is in direct contact with the paper tab(10, 20, 202, 214).

28. The method according to one of claims 1 to 5, characterized in that the molten polymer layer is applied using a grooved roller screen roller or rolling of the roller, especially with the application of three-roller system.

29. The method according to one of claims 1 to 5, characterized in that the plastic layer (80) is formed on the entire surface of both paper tabs(10, 20, 202, 214).

30. The method according to one of claims 1 to 5, characterized in that the material (30) layers of plastic (80) down in the form of prepolymer, in the form of a polymer dispersion or polymer solution, which in connection with paper tabs either at the point of connection with them chemically or physically hardens, and/or reacts, and/or drying and/or zastupnevich.

31. Multilayer substrate (60), which can be manufactured by the method according to one of the preceding paragraphs.

32. Multilayer substrate (60) p, characterized in that at least one of the C paper tabs (10, 20, 202, 214) has in some areas at least one through-cut (90), and these are preferably both paper tab (10, 20, 202, 214) are through cuts (90), and these cutouts (90) combine with register so that at least some sections form a viewing window (100) and/or region (91), in which the plastic layer (80) is open on one side only, and that in the outer region of cut (90) are flattening.

33. Multilayer substrate (60) one of p-32, characterized in that the two paper tabs (10, 20, 202, 214) are, respectively, through openings (90), and these cutouts (90) combine with register so that at least some sections form a viewing window (100) and/or region (91), in which the plastic layer (80) is open on one side only, and that the layer of plastic (80) has at least one sign of protection in the form of a security thread and this security thread is visible in the viewing window (100) and/or areas (91) in the final multilayer substrate (60) for direct viewing, and particularly preferably region (91), in which the plastic layer (80) is open only on one side, is placed preferably in the direction of the protective thread alternately on the upper and lower sides of the multilayer substrate (60) so that the security thread is visible as a windowed thread" on both sides in direct view.

34. Megaloi the second substrate (60) one of p-32, characterized in that thermoplastic polymer material layer of plastic (80) used a transparent material, and that the observation window (100) is made of highly transparent and has a smooth surface.

35. Multilayer substrate (60) one of p-32, characterized in that the material layer of plastic used amorphous polyamide, preferably with a transition temperature in the glassy state is above 20°C., particularly preferred polyamide 12 and/or amorphous copolyamide 12.

36. Multilayer substrate (60) one of p-32, characterized in that the paper layers have a density in the range of 5-500 g/m2, preferably in the range of 10-80 g/m2especially preferably in the range of 20-40 g/m2.

37. Multilayer substrate (60) one of p-32, characterized in that it withstands the number of double folds over 1800, in particular more than 5,000.

38. The multilayer substrate (60) one of p-32 as a protective material, packaging material, material for cards, secured paper, in particular as banknotes, checks, tickets, certificates, shares, bonds, certificates, licenses, permits.



 

Same patents:

FIELD: paper industry.

SUBSTANCE: method is intended to impart dirt and/or moisture resistance to porous substrate for protected documents, and also relates to dirt and/or moisture resistant protected document. Method includes application of dirt and/or moisture resistant compound onto opposite surfaces of porous substrate having porosity of approximately 20-100 millilitres per minutes and its impression into pores of substrate. At the same time compound penetrates and spreads at least in part of substrate thickness, then excess compound is removed from opposite surfaces of substrate. Coating press is used to impress dirt and/or moisture resistant compound into pores of substrate.

EFFECT: specified compounds applied by suggested method do not darken optically variable effects generated by non-porous film structures on the basis of microlenses, which may be used on or inside these protected documents, and thin layers of fibres applied and this introduced into parts of protective devices in protected documents containing windows with dirt and/or moisture resistant properties according to the present invention, demonstrate improved durability.

22 cl, 1 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to protective strip and counterfeit-protected paper intended to make secured documents, such as treasury notes, cheques or identification documents. Protective strip consists of cellulose support cloth formed by plant fibres and is arranged with the possibility of introduction into substrate, which consists of mass including plant fibres, so that specified protective strip is hard to detach due to physical and chemical links formed between plant fibres of substrate and support cloth.

EFFECT: proposed invention provides for prevention of document counterfeiting.

13 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: this invention relates to developments in protective substrates. Protective substrate comprises fibrous bearing structure and fibrous strip incorporated therewith. Said fibrous strip has at least one orifice indiscernible on viewing protective substrate in reflected light but visible in passing light. Note that said fibrous strip is, in fact, visible on at least one substrate surface with fibers of bearing base. Said fibers fill at least one orifice and form fibrous layer on strip surface around orifice edges.

EFFECT: increased counterfeit protection, ease of manufacture.

48 cl, 29 dwg

FIELD: technological processes; flaky items.

SUBSTANCE: invention relates to improvement of methods for manufacturing of protective substrates having protective properties. Method includes stages for manufacturing of extended fibrous tape and creation of at least one protective facility in tape or on tape. The main substrate is formed by means of fiber deposition on bearing surface, and tape is introduced inside the main substrate to produce protective substrate in process of the main substrate forming. At the same time at least one protective facility is arranged in process of tape manufacturing and is at least partially formed by fiber, from which the tape is formed.

EFFECT: development of fibrous substrates that have new protective properties.

34 cl, 27 dwg

FIELD: textile; paper.

SUBSTANCE: protected base plate includes, at least, one extended protective sign. In addition, the aforesaid protective sign is provided with a line of front sections, which are open in windows line. The windows are implemented in the first surface of the base plate. In addition, there is another line of sections covered with the base plate at their partitions. The partitions are available between windows and in the first surface of base plate. Each front section contains the first protection sign which is provided with similar appearance in each section and visible through each window if one looks in the reflected light at the first surface of base plate. The second sections include the second protection sign which is provided with similar appearance in each second section but differs from the first protection sign. It is not visible in the reflected light when one looks at the first surface of base plate. On the contrary, the second protection sign is visible in radiographic light if one looks at the first surface of base plate.

EFFECT: designing of base plate with different protection signs subject to identifying under different observation conditions.

18 cl, 37 dwg, 1 tbl

FIELD: physics, printing industry.

SUBSTANCE: security feature comprises a flexible base layer; at least one side of this layer is covered by a metallic material layer with the sections where metal thickness amounts to 70% at most and 25% at least of the metallic material layer thickness at the adjacent sections; the security feature comprises also a layer of embossed holographic varnish.

EFFECT: increasing securities counterfeit protection.

19 cl, 5 dwg

FIELD: textiles, paper.

SUBSTANCE: method pertains to manufacturing of fraud-proof paper used for manufacturing of fraud-proof polygraphic products. According to the first variant of the method for manufacturing fraud-proof paper, paper linen with more than 2 mm width protective tape is formed, the said tape being inset into the aforesaid linen at its formation on a grid cylinder. Note that a protective tape is introduced into the mass so as to form, prior to its contact with the cylinder, a mould fibrous layer, excluding the areas on the cylinder surface where no fibrous layer is formed due to the absence of filtering capacity. The protective tape is placed on the cylinder in such a manner that part of its surface matches with cylinder elements on which formation of the layer does not occur, zones of access being formed, i.e. windows from the grid side of paper. Areas on the cylinder surface with absence of filtering capacity are created either by closing grid with filigrane, or by filling the grid with waterproof material, or by furnishing the grid with through holes. From the side opposite to that of the grid, the protective tape is fully or partially open, through windows being formed in places of windows matching from the grid side and full or partial exit of the protective tape from the opposite side of paper. According to the second, third and fourth versions, paper linen with more than 2 mm width protective tape is formed, exit of the protective tape being provided on both sides of paper linen to produce the effect of a through window.

EFFECT: better fraud-proofness of paper.

32 cl, 15 dwg

Monetary note // 2344051

FIELD: polygraphy.

SUBSTANCE: monetary note is made in the form of a rectangular sheet supplied with reinforcement in the form of strips, placed on two diagonals of the rectangular sheet. The given solution allows for increasing operation reliability and durability of monetary notes as well as for lowering expenses for monetary circulation maintenance.

EFFECT: increased operation reliability and durability of monetary notes.

FIELD: textile, paper.

SUBSTANCE: method refers to manufacture of bond paper protected from forgery, using polymer thread with figured edge as a protective element. The thread consists of central core and side elements shaped as wings. The polymer metallised thread with figured edge is implemented into the paper during the process of its manufacturing in the mold of the papermaking machine. Then follows dehumidification of the product along with layer forming and its pressurising. The thread is strained during implementing into paper. The thread strain provides creation of fibers on the surface of central core in the wings area. This provides voluminosity of the protective element.

EFFECT: bond paper protection enhancement.

9 cl, 3 dwg

FIELD: manufacture of base such as paper including elongated members.

SUBSTANCE: method involves placing fibers onto movable supporting surface for forming of base; inserting elongated member so that it is at least partly pressed into base; controlling and providing information indicating position of control characteristics of elongated member after pressing of elongated member into base and position of base; using information on position for controlling speed of inserting of elongated member so as to provide matching of control characteristics of elongated member with control characteristics of base.

EFFECT: increased efficiency in protecting of paper from counterfeit.

29 cl, 3 dwg, 3 ex

FIELD: printing industry.

SUBSTANCE: counterfeit-proof paper is proposed to manufacture counterfeit-proof documents, such as banknotes, identity cards or other similar valuable papers. Secured paper has specified thickness, as well as a section with thickness below specified, produced in process of paper web manufacturing due to application of net with appropriate relief structure in paper-making machine, or by limitation of paper web dehydration extent at this section. Secured paper also has a hole, which is arranged on specified section and has dimensions that are less than dimensions of this section.

EFFECT: paper has high extent of counterfeit protection.

28 cl, 12 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to document of book type, in particular to ID having book binding or book cover. Document contains at least one page with personal data and several inner pages sewn to flyleaf and joined to book binding or book cover. Page with personal data has a valve opposite to seam, besides there is at least one protection criterion available on valve or at least an element of at least one criterion of personal data page protection, inner page, book binding or book cover.

EFFECT: invention provides for a high protection of document against counterfeit and also reduces probability of personal data page counterfeit.

8 cl, 3 dwg

Protective element // 2401745

FIELD: printing industry.

SUBSTANCE: invention relates to protective element for secured document, which has a base solid made of base material. Protective element contains the first luminescing substance and the second luminescing substance, between which a transfer of energy is provided. Range of excitation frequencies in one of luminescing substances corresponds to range of emission frequencies in other of luminescing substances, at the same time the first of luminescing substances is thermally unstable at the temperature of base material ignition and/or at the temperature of 185°C. There is the first area containing the first luminescing substance and the second luminescing substance, at the same time the second area only has the first luminescing substance.

EFFECT: protective element provides for a high extent of counterfeit protection, with simplicity of its inspection.

9 cl, 4 dwg

FIELD: paper industry.

SUBSTANCE: method is intended to impart dirt and/or moisture resistance to porous substrate for protected documents, and also relates to dirt and/or moisture resistant protected document. Method includes application of dirt and/or moisture resistant compound onto opposite surfaces of porous substrate having porosity of approximately 20-100 millilitres per minutes and its impression into pores of substrate. At the same time compound penetrates and spreads at least in part of substrate thickness, then excess compound is removed from opposite surfaces of substrate. Coating press is used to impress dirt and/or moisture resistant compound into pores of substrate.

EFFECT: specified compounds applied by suggested method do not darken optically variable effects generated by non-porous film structures on the basis of microlenses, which may be used on or inside these protected documents, and thin layers of fibres applied and this introduced into parts of protective devices in protected documents containing windows with dirt and/or moisture resistant properties according to the present invention, demonstrate improved durability.

22 cl, 1 ex

FIELD: paper industry.

SUBSTANCE: method is intended to impart dirt and/or moisture resistance to porous substrate for protected documents, and also relates to dirt and/or moisture resistant protected document. Method includes application of dirt and/or moisture resistant compound onto opposite surfaces of porous substrate having porosity of approximately 20-100 millilitres per minutes and its impression into pores of substrate. At the same time compound penetrates and spreads at least in part of substrate thickness, then excess compound is removed from opposite surfaces of substrate. Coating press is used to impress dirt and/or moisture resistant compound into pores of substrate.

EFFECT: specified compounds applied by suggested method do not darken optically variable effects generated by non-porous film structures on the basis of microlenses, which may be used on or inside these protected documents, and thin layers of fibres applied and this introduced into parts of protective devices in protected documents containing windows with dirt and/or moisture resistant properties according to the present invention, demonstrate improved durability.

22 cl, 1 ex

FIELD: textile; paper.

SUBSTANCE: authentication mark is specific for this secured document, and element of authentication is intended to verify authentication marks of other documents from this row of secured documents of the same type. Nondestructive verification of authentication mark of protection system is executable only by means of pre-specified effect from combination with element of authentication in protection system arranged in other secured document of the same type.

EFFECT: high extent of counterfeit protection of documents, simplicity and reliability of their verification.

30 cl, 20 dwg

FIELD: textile; paper.

SUBSTANCE: in the first layer of paper there is a continuous element of protection, which is freely accessible at least at one side of paper layer. The first layer of paper is coated at freely accessible side of protection element by the second layer of paper, which has one or more holes on section of protection element. At the same time the first layer of paper has watermark, and the second layer of paper is interrupted on section of watermark.

EFFECT: high extent of counterfeit protection.

41 cl, 46 dwg

Lottery ticket // 2400279

FIELD: personal use articles.

SUBSTANCE: invention refers to lottery holding, in particular - to lottery tickets. Lottery ticket contains base, where play field is arranged, containing number indicating win amount, and reference number closed by removed non-transparent metal coating, and also auxiliary reference field, containing reference code number, also closed by non-transparent metal coating. The base is separated by line of separation, arranged in the form of perforation, into reference and play parts. Reference number and bar code duplicating this number are specified onto reference part. Play part contains play field, under which there is a protective element arranged on rear side of base in the form of rectangular raster, made with the help of positive and negative microtext, having area exceeding area of play field section, where number indicating win amount and reference number are specified.

EFFECT: proposed invention provides for expanded arsenal of technical facilities, and also improved protection of information about win, available on ticket.

3 dwg

FIELD: physics, labelling.

SUBSTANCE: invention relates to an electric discharge method of marking thin-sheet dielectric articles, particularly strictly accountable paper documents and paper money. The method of making an irreproducible identification mark involves deposition of an identification number, an information array and an irreproducible picture through discharges and entering the irreproducible picture into a database. The irreproducible picture is created through discharge between main and auxiliary electrodes and an identifiable dielectric article, for example paper, is placed between the main and auxiliary electrodes.

EFFECT: disclosed document with an irreproducible identification mark ensures high security from replication and forgery.

3 cl, 3 dwg, 1 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to secured paper used to manufacture documents, such as banknotes, bills, etc. Secured paper contains synthetic elements with characteristics visible to the naked eye or under specific conditions, and/or by detectors. At the same time paper comprises protective pigments introduced into paste of synthetic element itself, which, in its turn, represents polypropylene.

EFFECT: proposed invention provides for high extent of counterfeit protection of documents including highly wear-resistant synthetic elements.

5 cl, 3 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to device intended for producing three-layer with cellular filler and can be used in machine building, aerospace and aircraft engineering. Device comprises furnace - autoclave to control heat conditions and balance distributed heat flows, service panel to accommodate assembly of produced three-layer panel with cellular filler, appliances to clamp panel relative to service plate and appliances to remove volatile fractions of glue. Three-layer panel consists of outer linings, cellular filler and film glue laud between cellular filler and linings. Appliances to clamp panel relative to service plate comprise cover with drain holes furnished with detachable piston-type pneumatic cylinders with their high-pressure chambers communicated via pipeline with feed union. Service plate has appliances to fasten rotary device on circular table to rotate said assembly consisting of service plate with three-layer panel secured thereon with the help of said cover in vertical position relative to the axis perpendicular to gravity force. Service plate and cover are made from material that features thermal expansion factor approximating to that of panel with cellular filler.

EFFECT: better distribution of glue.

3 cl, 4 dwg

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