Paper/cardboard with protection means and method for producing of paper/cardboard with protection means

FIELD: pulp-and-paper industry.

SUBSTANCE: paper/cardboard with protection means comprises paper base and cardboard base having one or more layers of cellulose fibers and surface-processed layer adjoining at least one side of paper/cardboard base, of which layers at least one layer is part of at least one local deviation defining distinctive sign on paper/cardboard. Local deviation comprises locally compressed material and locally surface-processed layer having thickness exceeding thickness of respective surface-processed layer disposed around and outside indicated layer. Method for producing of paper/cardboard with protection means is also described.

EFFECT: increased efficiency in producing of low-cost surface- processed cardboard and paper protected from counterfeit, provision for obtaining of desirable precise distinctive signs on paper or cardboard.

20 cl, 4 dwg, 3 ex

 

The SCOPE of the INVENTION

The present invention relates to paper/cardboard protection, which includes a core material and one or more surface-treated layer on one or both sides of the base material. The core material may be a paper or preferably cardboard.

Paper usually contains a layer of cellulose fibers, but may contain multiple layers. This type of paper has a definite thickness and strength, and preferably will have a mass per unit area, or weight, making more than 80 g/m2and most likely exceed this value at least 2 times. The carton contains one or usually several layers of cellulose fibres, for example four or five layers. If the pulp in all fiber layers of the same type, as a rule, it is chemically treated pulp, the product is called homogeneous cardboard, and if at least one of the fiber layers pulp contains a lot of different type, different from other fiber layers, the product is a folding boxboard. Fiber layers such cardboard usually consist of chemically treated cellulose and, for example, from wood pulp. The mass per unit area, or dosing, cardboard can be varied within wide limits: from 140 g/m2to 600 g/m2.

Under the surface the STN-treated layer is meant mainly covering layer. This layer is derived from various kinds of coating composition. As previously noted, the base material may contain one or more coating layers, and the mass of all coating layers can be varied within wide limits, for example from 5 g/m2up to 70 g/m2.

The invention also relates to a method for paper/cardboard protection.

The LEVEL of TECHNOLOGY

A substantial part uncoated papers contains the so-called watermarks, such as the name of the manufacturer or other characteristic of the symbol. The watermark is usually applied screen wire in the paper machine, which may be located, for example, on genderrole. The watermark is clearly visible when the paper brings to the light source, it may be daylight from the window. This type of paper is one of the forms of paper with protection.

Marking the treated paper is conducted in a variety of ways to enter in the composition of the paper something similar with a watermark.

According to the international (PCT) application WO 94/07694 chemical applied to the paper so that the paper has become transparent on the surface, which is applied chemical. The desired chemical is applied by passing through a number of rollers of the chemical solution on the device labeling that is installed on the cylinder, which has the immediate vicinity of another cylinder, through which a chemical solution is passed from the unit marking on the paper when the paper passes through the contact zone bounded by two specific cylinders. The application of watermarks using chemicals carry out directly on the printing press and the specified treatment is carried out either prior to, or immediately after the printing process.

According to the description of the patent in Germany 3718452 a number of distinctive characters press on the paper by mechanical means, and, as stated in the description, the paper becomes transparent in place of stamping. This is carried out by means of the cylinder, which caused a large number of curved protrusions. Anvil (or support) is fixed on the shaft, their number coincides with the number of tabs, they are at some distance from the above tabs and they are wider than the respective protrusions. The paper is introduced into the gap between the projections and anvils (legs), and because the narrowest part of the specified gap is slightly narrower than the thickness of the paper, the pattern of the protrusions will be embossed on the paper.

The need for surface-treated paper, mainly coated paper, recently increased significantly. If the base paper containing a watermark applied, as described above, will malout, watermarks are hidden covering layer and the paper cannot bude is easy to identify. In the patent Sweden 505397 (9503958-2) described the paper, which is easy to identify, despite a surface treatment such as coating. In the mentioned patent presents a security paper, the Foundation of which has at least one side, a surface-treated layer, and the difference of this paper is that the thickness of the layer in a certain place is clearly different from the layer thickness greater part of the remainder of the paper surface, resulting in the specified local thickness deviation forms a characteristic mark on the paper. This paper contains a basis that is uniform over the entire surface, whereas the surface-treated layer, for example the covering layer, contains surfaces that are characteristic signs, where the layer thickness or more, or less (or both, in different places)than the thickness of the layer on the other surface of the paper. Distinctiveness of paper with protection associated with the action of light or radiation. The characteristic marks on the paper are clearly visible when the paper is kept above or in front of the light source, for example a light bulb or lamp. If the local thickness of the layer is greater than the thickness of the rest of the paper surface, the characteristic signs have a color darker than the color of the rest of the paper surface, and if the local thickness of the layer is less than the thickness of the prevailing with the OYA paper, the characteristic signs are color lighter than the color of the rest of the paper surface.

In European patent application 0687771 presents security paper, which contains a paper with a high mass per unit area, and also known as the cardboard and possibly also paper cardboard or heavy paper. According to this patent application complex, surface-visible, shaped figure on the material by passing the fabric of this material through the contact zone, limited figured cylinder and the cylinder back pressure, directly after the pressing unit of the paper machine. The canvas material in this site is the moisture content, which allows you to quickly absorb the drawing and which is then fixed by means of hot drying cylinders in the specified machine. This figure is more stable and clear, you can make it even more profiled than the picture that is put on the pre-dried material.

Description of the INVENTION

There is a need for a relatively inexpensive surface-treated paper with protection and, to a lesser extent, relatively inexpensive surface-treated cardboard protection, for example, when cardboard is used for packaging products of different brands. There is also a need to) is not the same time, spent on the transition from production on paper machine any other products to the production of the mentioned products with protection reverse transition, or even complete elimination of such time.

The present invention satisfies these requirements and solves the above problems, and relates partly to the paper/cardboard protection, containing one or more layers of cellulose fibers that form the basis of paper/cardboard together with one or more surface-treated layer adjacent to at least one side of the Foundation paper/cardboard, of which at least one layer is a part of at least one of a local deviation, forming a characteristic mark on the paper/cardboard, while the invention is characterized by the fact that the local deviation contains locally-compressed material in conjunction with locally-surface-processed layer, the thickness of which is greater than the thickness of the respective surface-treated layers, which are located around and outside the specified local layer, and also relates to a method for production of such products.

A single distinctive sign or, usually, a few typical characters have kind of company name and/or logo and/or trademark and/or some other special characters. The extent to which the ha is alternia signs cover the surface of paper or paperboard, may vary in accordance with the requirements, although, as a rule, it is, for example, a maximum of 10% of the surface or, on average, 5%.

The base paper can be any paper that has the above mass per unit area or weight. A large part of the paper contains cellulose fibers, including cellulose fibers, which produce mechanical, chemical and mechanical or chemical means. Lignocellulosic material, which produces pulp mass, can be any known lignocellulosic material, including softwood and hardwood. The mixture of different cellulose fibers forms a standard part of pulp. The pulp can be unbleached, porublennoy or bleached, the latter is the dominant pulp mass. Base of paper or in whole, or in part may consist of secondary recycled fibers. You can also add synthetic fibers. The base paper contains one or more known chemicals in addition to cellulose fibers. Some of the basics of paper contain one or more fillers.

Basically, the above is also applicable to the cardboard. Although a Board may consist of only one layer of cellulose fibers, but often contains several fiber is love, for example three, four or five such layers. A high-quality cardboard in different layers are often used fully bleached chemically treated pulp such as Kraft pulp made from softwood and hardwood, which can be used without admixture, and in the composition of the mixture. One or more middle layers are usually fully or partially consist of pulp and waste paper, that is made of cellulose, which is obtained, for example, from scraps of cloth cardboard in the extender or the shredder. As previously noted, the above cardboard called homogeneous cardboard. Another type of cardboard is a folding boxboard, in which at least one of the layers contains fiber wood pulp, while the remaining layers usually contain fully bleached chemically treated pulp mass.

Only fiber from recycled materials use in one or more layers of a certain type of cardboard. There are many types of cardboard, and they can all be part of the cardboard with the protection of this invention.

As the base paper, the cardboard may be coated on one or both sides surface leeuwin layer, which is obtained from the chemical mixture, usually starch and/or any other synthetic glue as the main ingredient. Paper/cardboard m which may also contain a substance which gives the paper hydrophobic properties, further hydrophobization substance.

Surface-treated layer or layers will initially contain the covering layer. The source material may have been previously coated with any coating composition. Such compositions typically contain a large number of chemicals, where are dominating the binder and pigment. The composition may also contain an optical Brightener. Surface of the adhesive layer, which can be added to the pigment contained in the definition of a coating composition, which is used in this document.

In its simplest form the product with protection according to the invention contains a base of paper or cardboard, possibly with the addition of a layer of surface sizing, which is injected in one of the intermediate stamping operations with at least one compressed surface, forming a distinctive mark, such as a logo, and all material is deposited coating layer, which has the same thickness, except thickness over the distinctive sign, where the layer has a large thickness. The difference in layer thickness due to the fact that the embossed surface, i.e. a compressed surface, forming a dipped or plated surface in the material, and when the coating composition is applied to the rest of the surface m is material, in accordance with any known technique for coating, more structure will remain in the recess or recesses than the rest of the material. This difference in the amount of coating composition results in a local increase in the thickness of the coating layer after drying of the composition with the formation of the final layer.

When such paper or cardboard trays to the lamp or to the window, distinctive sign will have a darker color than the rest of the material. If such paper or cardboard to hold in one hand and positioned at an angle such as to incline relative to a light source, you will see the difference in the Shine or gloss distinguishing mark or marks on paper or paperboard in whole. This difference in the Shine will remain even after the deposition of the material of the printed ink.

According to one of preferred embodiments of the invention increased the local thickness of a coating layer is not fully compensate for the reduced thickness of the underlying material, which is the result of this compression. This is due to a small lowering of material on the surfaces of distinctive character, sposobstvuesh the fact that these surfaces become visible, on the one hand, and, on the other hand, the surface can be distinguished by touch, that is the province of the Dublin core finger material.

If for some reason you want the security paper or cardboard protection were completely smooth and flat, in the absence of any holes in the material, for example, if the material is necessary to apply any special impression, specifically increased the local thickness of a coating layer may serve as a compensation for the reduced thickness of the underlying material due to the specified compression.

The above product may contain at least one additional coating layer. In this case, at least the lower cover layer is locally increased thickness. If the product has, for example, two coating layers, it is likely that both the top layer will have a locally increased thickness. Of course, that the thickness of the lower coating layer is larger than the top layer, which lies above.

The thickness of the coating layer or layers in places distinctive marks of the paper/cardboard is determined by several factors, such as embossing depth in the material used technique of coating, the amount of coating composition applied to each layer, and so on.

According to another example embodiment of the invention, the source material prior to stamping, and, therefore, locally-compressed material, contain a base of paper or cardboard, possibly over ostim adhesive layer, and the first coating layer, and all this material is covered with a covering layer of the same thickness, except for the above distinctive sign or signs, where the thickness is greater.

Similarly to the above-described paper or cardboard may contain at least two additional coating layers, of which at least the lower of said additional coating layers has a locally increased thickness.

By visual inspection, for example, cardboard protection in cross section in the area of distinctive character and nearby to the specified character region, the compression of the basis material, usually has essentially a rectangular shape. The deviation from a strictly rectangular shape is a consequence of the fact that the transitions between the three parties compression are not sharp, that is, perpendicular, and rounded to a greater or lesser extent. The bottom surface compression is usually flat and parallel to the bottom of the bounding surface of the cardboard, in the standard case. However, it is possible and even desirable, if the specified bottom surface is sloped relative to the lower bounding surface of the cardboard. The bottom surface may also be V-shaped, and has in the context of any other form. A profiled bottom surface coated with at least one protect the tion layer, which can also be somewhat profiled. This allows you to paperboard distinctive sign, which has, to some extent, three-dimensional image.

So far been described only products having at least one side caused one coating layer. Naturally, on the other side of the product can also be applied to at least one covering layer. If, for example, cardboard protection according to the invention is suitable for packaging, that is, to put it a different product or subject, ordinary coating layer on the inner side of the cardboard (which is not mandatory) will be sufficient. If the cardboard according to the invention with the protection required for production, which will be visible to both sides of the cardboard, possible and appropriate application of both sides of distinctive signs in the above manner.

As previously stated, the coating layer may contain an optical Brightener. Because this top layer is thicker in places the surface where the distinctive mark(s), and optical bleach will be more in these areas than in the rest of the material. If the material is to be placed above the ultraviolet lamp, or better, if such material will be covered such a lamp with one of the sides or top, surface, on which presets is there a distinctive sign, will be clearly visible and will be of particular brightness or white glitter. The optical Brightener may be entered in the material itself (as described in detail below), in the form of a very thin film, which is collected in the grooves, forming areas of areas of distinctive character, in addition to the applied coating layer.

Cardboard and security paper according to this invention can thus be easily identificada using natural light and/or artificial light from ordinary light bulbs and/or ultrafioletowego light.

The invention also relates to a method of making paper/cardboard protection, where the covering layer is applied respectively on the moving canvas paper/cardboard, possibly after application of the surface of the adhesive layer, at least one stage, wherein the moving canvas paper/cardboard is passed between the embossing cylinder and the cylinder back pressure, forming a node stamping and located in any position prior to applying the first coating composition, the specified stage stamping is formed at least one compressed, and thus shrunk, the local surface, which forms a distinctive mark on the canvas paper/cardboard, as specified shrunk place fill at least an hour is icno, done first coating composition so that the thickness of the coating layer on the specified local surface will be larger than the thickness of the corresponding first coating layer, which is located around and outside.

From the foregoing it is obvious that the embossing may be performed on the basis of paper or cardboard or surface-coated based paper or surface-prikladnoi cardboard in accordance with this first variant of the method of the invention.

In the case of Board machine node stamping feature directly after pressing unit or between the pre-drying apparatus and possible pressure for bonding, or between the possible pressure for bonding and subsequent drying device. If BM contains a node coating (calender), the node stamping set immediately after or immediately before the calender, or it can be included and be part of the calender. Positions corresponding to these positions shall also comply with and in the paper machine.

After receiving material coated with an embossed and received one or more recesses canvas material moisturize throughout the width of the aqueous solution, which contains an optical Brightener low concentration and/or some is that other chemicals in low concentrations in any selected position after the stamping apparatus. Can be used any known optical bleach (it is also possible the use of a substance mixed with the coating composition). Under low or weak concentration of optical Brightener understand the ratio of one part bleach for every one hundred parts of water. Polyvinyl alcohol, for example, can be used as an additive to the bleach, in the amount not exceeding three parts. Because, basically, it is thin, the water is Nakanoshima on the material, a large amount of aqueous solution is collected in the grooves that form the distinctive zone, and, consequently, a significant amount of optical Brightener will also accumulate in these areas. The introduction of optical Brightener in the above-described method is so effective that it eliminates optical Brightener additive in one or more coating compositions, if you want a distinctive area or surface of the food protection can be determined by illuminating them with an ultraviolet lamp. In this case, instead of the optical Brightener can be used dye. This substance or the chemical is applied to the material in the form of an aqueous solution of low concentration. High concentration of the coloring matter in distinctive zones or surfaces products with what Amitai allows you to define the used dye by inspection, if you place the product over conventional incandescent lamp.

Also proposed an alternative method of manufacture of paper/cardboard protection. In this alternative method, after the possible application of surface sizing on a moving canvas paper/cardboard is applied respectively to the first coating composition, which after drying forms a first coating layer, then applied respectively additional coating composition, of at least one stage. The method differs in that the wet paper/cardboard with the first covering layer is passed between the embossing cylinder and the cylinder back pressure obtaining at least one compressed, and thus shrunk, local zone, forming a distinctive mark on the first cover layer and on the canvas, paper/cardboard, with specified shrunk place fill, at least partially, the second coating composition applied on the specified canvas so that the thickness of the second coating layer specified shrunk local area will be larger than the thickness of the respective second coating layer, which is located around and outside.

In this case, the node stamping feature after the first node coating and also after subsequent stage of drying in Board or paper machine.

If you see Popper is offered by the section of cardboard with protection, obtained as described above, in the area of distinctive character and in the immediate vicinity of a specified character, when shrunk the place obtained in the material is close to a rectangular shape, at least the upper part of the two vertical sides is clearly visible, as the device stamping easier penetrates through the top layer than the layer of cellulose fibers or part of the layer of cellulose fibers.

The amount of coating sections after node stamping limit one, there may be two or more.

As in the previous case, a cloth moistened with an aqueous solution containing optical Brightener low concentration and/or some other chemicals in low concentrations, in any position after node stamping.

In this regard, as in the previous case, the material can be coated according to any known method, for example, by roll coating, coating with removing the excess strap through, by means of a spray, and pripressovyvanie film material. You can also use different techniques in different positions.

One of the advantages of the invention of paper with protection and cardboard protection is that consumers of paper and cardboard can get the exact distinctive marks on paper or cardboard, p is desired. It is well known that various product logos and also other products made unauthorized copies. As an example, it can be noted that certain products, such as cigarettes, drugs and cosmetic products, produce and put into circulation of persons who are not owners of the brand or is entitled to engage in these activities. In most cases it is impossible to determine the authenticity of the product nor the seller, nor the buyer, as the packaging is in both cases identical. If the product packaging in the present invention cardboard protection, pirated products will be harder to sell. In the described case, the difference in gloss or gloss between the area of distinctive character and remaining the predominant surface of the packaging material determined by placing the package at an angle to the light source, daylight and/or top to light at the point of sale. Distinguishing marks easier to see using an ultraviolet lamp, or a stationary or portable, directed on the package, if the carton contains optical Brightener, and when the carton contains a large number of distinctive characters.

The cost of production is reduced, if the seller and/or the consumer invented paper or cardboard makes a request to the manufacturer of the product for the application, for example, a special character, General what about the species, that is, species, easily recognized in a variety of situations. In this case, the manufacturer of paper and cardboard enough to create a single cylinder stamping (or only a few cylinders stamping), which can be installed almost once in the car for all cases of application.

Another advantage is that the distinguishing mark is applied to the cardboard using only node stamping and using chemicals that are typically used in surface treatment processes, mainly when applying coating materials, in other words, without requiring any additional chemicals that may be more expensive and/or cause damage to the environment.

An important advantage of the method in accordance with the invention (and also related to the cost of manufacture of the product to some extent), is that once installed the embossing cylinder and cylinder back pressure (if they were not used in the car), the manufacture of the invented products with protection can be initiated and completed without the need to suspend operations related to production of the corresponding paper or the cardboard. This is achieved, for example, by hinge installation cylinder stamping, so as to lift the cylinder stamping from canvas material the material with the not to touch the specified canvas, and then lock cylinder stamping in starting and idling position, for example, in order to be able to stop production of the product with protection according to the invention.

In respect of paper and cardboard according to the invention it may be noted that when he has a flat shape, and not converted, for example in a drawer or box, a distinctive mark on the product can be easily seen by placing material over conventional incandescent or positioning the product against the daylight from the window. Typically, the UV lamp can also be used, as described in the above angular method.

Description of the DRAWINGS

Figure 1 illustrates the security paper according to the invention, placed above the ordinary incandescent lamp.

Figure 2 is a schematic cross-section of cardboard with protection according to the invention, showing distinctive sign and the neighboring region according to one embodiments of the invention.

Figure 3 is a schematic cross-section of cardboard with protection according to the invention, showing the distinctive sign and the neighboring region according to another variant embodiment of the invention.

Figure 4 schematically illustrates a portion of the Board machine, in which primenyayutsya method according to the invention.

A PREFERRED EXAMPLE IMPLEMENTATION

The invention is described hereinafter with reference to the drawings, and with reference to tests related to the production of cardboard with protection according to the invention.

Figure 1 shows a sheet of A4 invented paper 1 protection. The paper has eight distinctive signs 2 in the form of special characters, more precisely in the form of an anchor. The number of identifying marks on each sheet of A4 paper can be more or less than eight. Paper 1 protection placed over conventional lamp 3 bulbs. The lamp 3 twist in the nest and leave either outright or put it in a box, which, for example, has a box of glass, is located above the lamp. If the paper 1 with protection put on the glass, you can see eight distinctive signs 2, as shown in the figure. The contrast between eight distinctive marks 2 and the surface of the paper in General is not as pronounced as shown in figure 1. (For contrast, symbol changes, for example, if you copy a picture of the original character). This contrast takes place, i.e. the tone distinctive signs 2 darker than the remaining surface of the paper, because the local thickness of the layer is greater than the total thickness, i.e. the thickness of the layer dominating the surface of the paper. Marked layer receive, for example, if you had put in the usual malaval the hydrated composition. As noted previously, such a composition can contain, or not contain an optical Brightener. If the coating composition includes an optical tdelivery, one can see a clear contrast between the characteristic marks and the remaining surface of the sheet of paper, if used instead of incandescent bulbs in the above device, the UV lamp, or a stationary or portable, whereby the cover sheet from the top or from the side.

Also it should be understood that the paper size is not limited to the above format and the specified format may vary within wide limits, which are determined by the client, i.e. the buyer of paper with protection.

There are many applications described in the paper with protection. It can be entered together with the specified product packaging, which concluded product. The paper may contain information relating to the goods or related product. Preferably, the genuine characteristic sign, i.e. limited surface allocated on paper, was free from the accompanying information. Compact disks (CD) is one of the examples of such products. Another example is the article of clothing, the specific nature of a particular design. The paper can be used in computer manuals and as the basic material in the manufacture of lottery tickets. The security paper can is also advantageously used in the production of various kinds of labels, for example, tin and glass containers or other packaging units, which contain drugs and medicines. In the information materials of different companies, intended for General use or for specific target groups, where it is necessary to clearly specify that the information material or document received from a particular company, you can also use the security paper. Invented the cardboard protection can be an alternative invented paper with protection in many of the above applications to which you can add a wide use in the field of packaging materials, such as cardboard make boxes, folders, and so on, which are then used for packaging drugs, cigarettes, perfume, chocolate and so on, or any other types of containers. Invented the cardboard protection can also be used in the manufacture of various types of advertising brochures or other printed products.

If invented paper 1 protection to 1 invented to replace the cardboard with protection, made in the same way as the security paper, the play should be approximately equal.

Figure 2 is a greatly enlarged schematic view of the cross-section of cardboard with protection produced in accordance with the first variant implementation is tvline of the invention, depicting distinctive character and its immediate surroundings.

It should be noted that the cross-section considered from the bottom up. The bottom layer 4 contains surface of the adhesive layer. The base paper contains four layers of cellulose fibres, it is the bottom layer 5, the middle two layers 6 and 7 and the top layer 8. Additional surface adhesive layer 9 is located above the layer 8. Then, the first coating layer 10 on which is formed the second coating layer 11. In this image the cardboard surface and the adhesive layer 9 are embossed, due plated 12. As can be seen, the covering layer 10 is thicker in the area of the plated 12 than in the surrounding lateral sides of the recess. The upper cover layer 11 is also slightly thicker in the area 12 than in the surrounding sides shrunk.

The total thickness of the coating layers in the zone 12 is significantly greater than the thickness of the coating layers, which are located around and outside of the specified zone 12. Most of the thickness of material in the described position, means that the zone 12 will be highlighted in a darker color than the color of the surrounding material, if the cardboard to put over conventional incandescent lamp, in accordance with the illustration in figure 1, for example.

Despite the fact that the thickness of the coating layer in area 12 is larger than the thickness of the surrounding coating layer remains is Bolshoe shrunk place in the material, as you can see exactly in the zone 12. This fact also leads to the fact that the zone 12 is easily distinguishable, that is, to obtain a distinctive sign or any features. This pressovanie in the material can be felt by swiping your finger or fingers of one hand along the surface of the cardboard protection.

Cardboard protection, shown in figure 2, contains two layers of surface sizing 4 and 9. As noted earlier, these layers are not required. Cardboard figure 2 also contains four layers of pulp fibers. It was noted earlier that the number of such layers may vary. For example, five layers of cellulose fibers are also often used as four layers.

Figure 3 is a greatly enlarged schematic view of the cross-section of cardboard with protection produced in accordance with the second embodiment of the invention, depicting the distinctive character and its immediate surroundings.

It should be noted that the cross-section considered from the bottom up. The bottom layer 13 contains a layer of surface sizing. Then, completely untouched cardboard, which contains a bottom layer of pulp fibers 14, the middle two layers 15 and 16 and the top layer 17. Surface of the adhesive layer 18 is located on top of the layer 17. Then, the first coating layer 19, an extremely thin film optical the th bleach and polyvinyl alcohol 20 and the second coating layer 21. In this image the cardboard 14-17 contain surface of the adhesive layer 18 and the first covering layer 19 before operation stamping on the cardboard, which resulted in the cardboard material appears in place of the recesses 22. The first compressed material was first coating layer 19 and then the surface of the adhesive layer 18. Although this figure is not shown, in some cases, may also be compressed and the upper layer 17 of cellulose fibers.

Extremely thin film optical Brightener and polyvinyl alcohol 20 at least twice as thick in the area 22 of the extrusion that forms the distinctive character than the thickness at the respective sides of this zone. The thickness of the second coating layer 21 is also much thicker in the area of pressovaniya, that is, the area 22 than on the respective sides of this zone. If the second coating layer contains an optical Brightener, a larger amount of optical Brightener in the area 22 than the surrounding surface, this zone will be clearly visible as a bright or glossy white region, if its to light using a UV lamp, it is possible to easily distinguish the surface containing distinctive marks from the remaining surface of the cardboard. In the finished material shrunk place in zone 22 is also visible, albeit weakly.

Figure 4 schematically shows the last half of artmodelling machine. Those machine parts that are not shown on the figure are the areas of loading and formation of various layers of cellulose fibers in the paperboard machine. The figure illustrates the initial stage of passage is formed of a cloth cardboard 23 through the pressing unit 24, through a guide roller 25 and the pre-drying zone 26. Canvas cardboard miss from the pre-drying zone at a press 27 for bonding, such as SYM-SIZER, where the applied surface of the adhesive layer on the upper side of the sheet of cardboard. Canvas cardboard then passed through the device 28 subsequent drying and then on the calender 30 through a guide roller 29. The calender usually contains a large number of rigid metal cylinder, such as a steel cylinder reinforced one above the other and forming a large number of cylindrical clamps.

Canvas cardboard passed through the calender 30 node 31 embossing, which contains the cylinder 32 stamping and smooth cylinder 33 of the back pressure. Both cylinder can be made of metal and in addition tonometrically. The lower cylinder is usually covered with rubber. The rubber coating may have a different degree of stiffness. The upper cylinder 32 is typically a metal, contains several tabs 34, arranged in the form of distinctive signs. These protrusions 34 in the figure increased to be once ledet. The tabs 34 penetrate into the sheet of cardboard and shrink first surface of the adhesive layer and the top of the canvas or layer of canvas paper, in order to get a set of embossed surfaces or recesses. The canvas material embossed is passed through the node 38 as blade coating and guide rollers 35, 36 and 37. This node 38 includes a container or tank 39, which contains the coating composition, the rolling roller 40, the cylinder 41 of the back pressure and the doctor device 42.

Rolling roller 40 captures the coating composition from the reservoir 39 and inflicts it on the side of the sheet of cardboard, on which there are embossing and deeper, forming a distinctive signs. The absence and the final thickness of the coating is determined by the doctor device 42, which limits the amount of applied coating composition. In the recesses remains more coating composition than the rest of the cardboard canvas.

Canvas cardboard coated is passed under an infrared drying device 44, through a guide roller 43, where the coating composition is dried with the formation of a coating layer. Canvas cardboard then passes to the next node 49 doctor coating, through the guide rollers 45-48, where on canvas cardboard coated with the first coating layer is applied a second coating layer in the same manner as the first node 38 of the coating. Then the fabric is double coated passes beneath the second infrared drying device 51 through the guide roller 50, where the dried second coating composition forming the second coating layer. The canvas is treated cardboard pass then through the guide rollers 52 and 53 on the roll or paper processing machine, where the canvas cardboard is converted into sheets of a given size (not shown in figure).

Cardboard protection, obtained as described above according to the invention, similar to cardboard, depicted in figure 2.

The tabs 34 on the cylinder 32 stamping is usually performed by a method of engraving, in which a cylindrical roller, for example, is milled to a predetermined thickness on a small surface, leaving some raw surface, and thus receive the data tabs.

These protrusions may be of any desired form, which determine the form and type of distinctive sign, which should be applied for the identification of cardboard. The embossing cylinders can be made or prepared in other ways. For example, on a smooth cylinder may be coated with the desired spacing adhesive tape, which has the form of a distinctive mark. Tape thickness determines to some extent the depth of the embossing. The latter is also determined by the area pechatnov the contact between two cylinders in the node 31 embossing. If BM contains a calender in accordance with figure 4, the processing in the calender, for example the pressure in the calender also has an impact on the subsequent embossing fabric cardboard.

EXAMPLE 1

The cardboard, containing four layers with a total weight per unit area or weight, 200 g/m2was obtained at a cardboard factory. In General, the cardboard contained 40% birch sulfate pulp having a white 91% ISO - international organization for standardization), measured according to the white ISO 2470, and 30% pine sulphate pulp with whiteness 91% ISO, and 30% pulp paper having a white, mainly corresponding to the above. Each layer contains an additive chemicals potato starch, gidrofobiziruyuschey substance in the form of dimers of alkylbetaine and retaining the substance in the form of polymers and bentonite. Also add pricing and sodium bicarbonate. On each side of the cardboard cause the surface of the adhesive layer in an amount of 4 g/m2. Surface of the adhesive layer contains:

100 parts of the pigment (a mixture of kaolin clay and calcium carbonate)

40 parts of corn starch

10 parts of a thickener (carboxymethyl cellulose)

1.5 parts of additional chemicals (hardener and wax)

This cardboard was placed in a roll in the pilot of the second installation, cooperated with a cardboard factory. The pilot plant included stage calendering cardboard and equipment for coating, which was used for different application technique. On the upper side, or printed side of the cardboard inflicted embossed in one of the zones of the calender, limited tonometrically cylinder and the cylinder with a rubber coating having a surface hardness of 10 p&j. The characters in the form of an anchor, similar to those shown in figure 1, having a thickness 0,050 mm and is made of vinyl plastic, is rigidly secured on tonometrically the cylinder. The linear pressure in the contact zone when the fabric width 53 cm was 37 kN/m, which gave a depth of print or dents in the cardboard about 0,024 mm Speed cloth cardboard was 250 m/min in the stamping process.

Then on cardboard struck two capping layer on the other side, on which was embossed. In both cases, the coating used the site as blade coating pilot plant. The first chalk composition, or pre (priming) composition contained:

100 parts of pigment (calcium carbonate)

15 parts of binder (styrene acrylate latex)

2,4 parts of polyvinyl alcohol (PVA)

0,6 part of the optical Brightener (Tinopal ABP-Z)

1 of the additional chemicals (segust the body, curing agent and pH regulator)

Coating composition containing 65% solids was applied over the entire surface of the cardboard in an amount corresponding to 10 g/m2, while the amount applied in engraved images, i.e. symbols in the form of an anchor, corresponded to 20 g/m2. The depth of the indentation on surfaces containing distinctive signs, declined to about 0.018 mm by applying preliminary (primer) layer. The speed of the coating amounted to 350 m/min Due to the fact that the covering layer contains an optical Brightener, and also because the embossed surface, i.e. space indentation, got more of the composition, the surface color was whiter than the rest milovana surface. The second coating layer, or the top coating layer, contains:

100 parts of pigment (kaolin clay and calcium carbonate)

20 parts binder (styrene acrylate latex)

1 of the additional chemicals (thickener, hardener, blue tint dye and pH regulator)

Coating composition containing 65% dry residue was applied on the entire surface of the cardboard in the number corresponding to 12 g/m2at the same time, the number of applied in engraved images, i.e. symbols in the form of an anchor, corresponded to 17 g/m2. The depth of the indentation on the poverhnosti, contains distinctive signs, reduced to approximately 0.012 mm when applying facial covering layer. The speed of the coating amounted to 350 m/min

From the above list of components of the front coating composition it is obvious that it did not contain optical Brightener. Despite the fact that the optical Brightener used only in the lower, or first coating layer, and also in a larger amount, on surfaces containing distinctive signs, these surfaces were still visible as a brighter white than the rest of the surface of the cardboard, if you cover the cardboard with the help of a UV lamp. And this despite the fact that increasing the thickness of the layer on surfaces containing distinctive signs, in comparison with the rest of the layer in relation to the second, or front, of a coating layer reduces this effect and, in addition, acts in the opposite direction. If this cardboard protection to be placed above ordinary incandescent lamp, it is possible to observe the opposite effect, i.e. the surface that contains distinctive signs will be darker than the rest of the cardboard.

EXAMPLE 2

This experience will, in fact, a repetition of the experience described in the first example, but with the difference that on the basis of cardboard first struck the first coating layer and then struck embossing. The linear pressure in the process t the tion, i.e. in the zone of contact, calender, supported lower, so it was 18 kN/m, while the depth of the print primed cardboard was about being 0.036 mm, the Second coating layer was applied to the embossed figures, i.e. symbols in the form of an anchor, in the number corresponding to 22 g/m2. After applying the second coating layer depth of the recesses was 0,022 mm Result: cardboard protection has similar properties with cardboard protection, produced according to example 1.

EXAMPLE 3

On the basis of cardboard caused embossing according to example 1. The depth of embossing the material was in this case 0,025 mm On the basis of cardboard with embossed caused an undercoat layer as in example 1 and with the same content of the coating composition, with the difference that reduced the amount of optical Brightener to 0.1 part and reduced the amount of polyvinyl alcohol to 0.4 part. The coating composition was applied on the surface containing distinctive signs, in the number corresponding to 21 g/m2that led to the reduction of the depth of pressovanii to 0.020 mm

The prepared aqueous solution contained:

100 parts of water

of 0.6 parts of an optical Brightener, which was described above

2,4 parts of polyvinyl alcohol.

This aqueous solution was applied on primed cardboard in film press with a speed of 350 m/min/p>

Then caused to the material of the front coating layer according to example 1. The amount of coating composition deposited on the surface containing distinctive signs, amounted to 16 g/m2due to this, the depth of the surfaces containing distinctive signs, reduced to 0.014 mm

The described method of manufacture of cardboard with protection according to the invention allows to obtain a surface having a distinctive signs, which contain much more optical Brightener than the rest of the surface of the cardboard, making the surface with distinctive marks can be clearly visible in ultraviolet light, although on the face of the covering layer.

1. Paper/cardboard to protect, contain(s) one or more layers of cellulose fibers that form the basis of paper/cardboard together with one or more surface-treated layers that are adjacent to at least one side of the Foundation paper/cardboard, and of which at least one layer is a part of at least one of a local deviation, forming a distinctive mark on the paper/cardboard distinguishing(s)by the fact that the local deviation contains locally-compressed material plus locally-surface-treated layer, the thickness of which is greater than the thickness of the corresponding surface-treated with the HH, which is located around and outside of the specified layer.

2. Paper/cardboard with protection according to claim 1, characterized in that distinctive character has the form of a company name and/or logo and/or trademark and/or some other special characters.

3. Paper/cardboard with protection according to any one of claims 1 and 2, distinguishing(s)by the fact that locally-compressed material consists of a base of paper/cardboard and optional surface of the adhesive layer.

4. Paper/cardboard with protection according to claim 3, distinguishing(s)by the fact that on the basis of paper/cardboard and optional surface kleevoi layer is applied coating layer, which has a locally increased thickness.

5. Paper/cardboard with protection according to claim 4, distinguishing(s)by the fact that increased local thickness of a coating layer is not fully equalizes the reduced thickness of the base material, induced by the specified compression.

6. Paper/cardboard with protection according to claim 4, distinguishing(s)by the fact that increased local thickness of a coating layer fully aligns the reduced thickness of the base material, induced by the specified compression.

7. Paper/cardboard with protection according to claim 3, distinguishing(s)by the fact that on the basis of paper/cardboard and optional surface adhesive layer applied two or more coating layers, of which at least the lower cover layer is locally increased thickness./p>

8. Paper/cardboard with protection according to any one of claims 1 and 2, distinguishing(s)by the fact that locally-compressed material contains the specified base paper/cardboard is possible together with the surface of the adhesive layer and the first coating layer.

9. Paper/cardboard protection of claim 8, distinguishes(s)by the fact that the basis of paper/cardboard is possible with the surface of the adhesive layer and the first covering layer is covered with a covering layer, which has localcooling thickness.

10. Paper/cardboard protection of claim 8, distinguishes(s)by the fact that the basis of paper/cardboard is possible with the surface of the adhesive layer and the first coating layer is coated with two or more additional coating layers, of which at least the bottom layer has localcooling thickness.

11. Paper/cardboard with protection according to any one of claims 1 to 10, distinguishes(s)by the fact that the upper delimiting surface of the compressed material has a profile that deviates from the essentially horizontal line.

12. Paper/cardboard with protection according to any one of claims 1 to 3 or 7, distinguishing(s)by the fact that the Board contains four layers of cellulose fibers, the bottom layer, the middle two layers and the top layer which is enclosed between the surface of the adhesive layer as the bottom side and top side, and localocracy from the top side; the top side of the framework of cardboard covered with the two coating layers, of them or only the lower coating layer, or both cover layers have localcooling thickness.

13. Method for the production of paper/cardboard protection, according to which the moving canvas paper/cardboard possible after application, the surface of the adhesive layer cover, respectively, the coating composition of at least one stage, wherein the moving canvas paper/cardboard is passed between the embossing cylinder and the cylinder back pressure, forming a node stamping, located in any position prior to applying the first coating composition, and the specified stage stamping will produce at least one compressed and thus shrunk the local surface, which forms a distinctive mark on the canvas, paper/cardboard, with specified shrunk place fill at least partially specified by the applied first coating composition so that the thickness of the coating layer on the specified local surface will be larger than the thickness of the corresponding first coating layer, which is located around and outside.

Cab according to item 13, wherein moving the fabric to the cardboard passed through the node stamping, located directly after the pressing unit of the Board machine.

15. The method according to item 13, from which causesa fact, what a moving canvas cardboard passed through the node stamping, located between the pre-drying device and possible Trouser sizing cardboard machine.

16. The method according to item 13, wherein moving the fabric to the cardboard passed through the node stamping, located between the possible pressure for bonding and subsequent drying device in the paperboard machine.

Cab according to item 13, wherein moving the fabric to the cardboard passed through the node stamping, located directly before or directly after node coating, which is part of the Board machine or is part of a node stamping.

18. The method according to any of PP-17, characterized in that the moving canvas cardboard with shrunk local surface hydrate aqueous solution containing subconsciously optical bleach, or before applying the first coating composition, or after application of the specified first coating composition.

19. Method for the production of paper/cardboard protection, according to which possible after surface sizing the first coating composition is applied respectively on the moving canvas paper/cardboard with the formation of the first coating layer and, after drying of the specified layer is applied next Malova the capacity composition respectively on the specified canvas paper/cardboard at least one stage, characterized in that the wet paper/cardboard with the first covering layer is passed between the embossing cylinder and the cylinder back pressure obtaining at least one compressed and thus shrunk the local surface, forming a characteristic mark on the first cover layer and on the canvas, paper/cardboard, with specified plated areas are filled, at least partially, the second coating composition applied on the specified canvas so that the thickness of the second capping layer on the specified local surface will be larger than the thickness of the respective second coating layer, which is located around and outside.

20. The method according to claim 19, characterized in that the moving canvas paper/cardboard with the first covering layer and shrunk the local surface is moistened with an aqueous solution containing subconsciously optical Brightener and/or some other chemicals in low concentrations, directly after this stamping process or after application of the specified second coating composition.



 

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