Adhesive peelable film

FIELD: chemistry.

SUBSTANCE: polymeric film consists of a block-copolymeric peelable middle layer and at least one adhesive non-peelable surface layer. The middle layer makes up 95% of the thickness of the film. The surface layer contains a terpolymer of polyethylene/polypropylene/polybutylene and has thickness from approximately 0.1 mcm to approximately 1.5 mcm. An adhesive coating is deposited on the surface layer. The adhesive coating and/or surface layer is hot-sealable. The middle layer has at least one olefin component. The adhesive polymeric film has high adhesion capacity in a wide temperature range and peeling capacity. Bonded packaging is made from the polymeric film which contains a block-copolymeric substrate and adhesive coatings and/or surface layer are obtained on the substrate. The packaging is obtained by wrapping the packed article with the film such that at least one area for overlapping and hot-sealing is obtained.

EFFECT: adhesive region can be opened by manually separating overlapping sections of the film without breaking the film in or around the bonded region.

24 cl, 1 tbl, 1 ex

 

The present invention relates to a peelable adhesive film and method of manufacturing such a film.

In the document WO-A-96/04178 describe peelable film comprising a middle layer containing olefinic polymer, and gracelewis layer containing a mixture of low density polyethylene (LDPE) and material that is incompatible with LDPE, such as olefinic polymer or co - or terpolymer ethylene, propylene or butylene. The film structure can goryacheklyuch with a container made of plastic for receiving the cap of the container or herself to receive the package.

In the document EP-A-746468 describe a multilayer film, which exfoliate the destruction inside the fact that in the description of the invention referred to as an intermediate layer between the layer of substrate and gracelewis layer. As mentioned, the intermediate layer preferably contains a mixture of polymers which do not crystallize together.

U.S. patent No. 5443915 discloses an oriented polyolefin film, including matte white surface layer of the receiving side when holodnokrovnye, on one side of the middle layer and deposited in vacuum metal layer on the other side of the middle layer.

In U.S. patent No. 5358792 describe garceschavez composition comprising (a) from about 30 to bring the LNA 70% (mass.) low-melting polymer, comprising a copolymer based on ethylene very low density determined by the density in the range of from about 0.88 g/cm3to approximately 0,915 g/cm3, a melt index in the range from about 1.5 DG/min to about 7.5 DG/min, a molecular weight distribution (Mw/Mn), not greater than about 3.5, and (b) from about 70 to about 30% (mass.) polymer based on propylene.

In U.S. patent No. 5482780 describe the oriented polymer of α-olefin film, comprising: a middle layer made of isotactic propylene homopolymer; the surface layer, forming a separating direction when holodnokrovnye and attached to one side of the middle layer; and processed on the surface layer of the receiving side when holodnokrovnye, or subjected to such processing layer containing cohesive goldnecklace composition across subjected to the surface treatment mentioned layer, on the other side of the middle layer. The surface layer, forming a separating direction when holodnokrovnye, contains an additive, reducing friction, and a mixture of two polymers, namely, ethylene-propylene statistical copolymer containing from about 2% to 8% of ethylene in such a copolymer, and ethylene-butylene copolymer, containing the s from about 0.5% to 6% of ethylene in such a copolymer. Layer, forming a receiving side when holodnokrovnye, is an ethylene-propylene statistical copolymer containing from about 2 to 8% of ethylene.

In U.S. patent No. 5500265 describe peelable film containing (a) a middle layer containing olefinic polymer, (b) surface layer at least on one surface of the middle layer, while the surface layer contains a mixture of butylene polymer with another olefinic polymer or a polymer of butylene and at least one other olefin, and (C) a coating layer on the surface layer.

U.S. patent No. 5716698 relates to peelable oriented, transparent, multilayer polyolefin film containing at least one opaque layer and peelable top layer.

U.S. patent No. 6248442 relates to multilayer films, which are goryachekluchevskaya in a wide temperature range. Patent '442 also relates to multilayer films, which provide for packages easily opened and hermetic bonding. Films of patent '442 formed from the middle layer containing linear low density polyethylene (LLDPE), and at least one surface layer having a melting point at least 10 ° C lower than the melting temperature of the middle layer is.

In U.S. patent No. 5997968 describe multilayer polyolefin film containing at least three jointly extruded layer comprising an opaque layer basics, intermediate layer and outer peelable surface layer consisting of two incompatible polyolefins, where the intermediate layer contains at least 80% (mass.) polyolefin having a lower melting point or a lower glass transition temperature than the polyolefin forming the layer of the framework.

In U.S. patent No. 6231975 described the bonding film comprising a middle layer of any olefinic polymer, an adhesive layer and a separating layer located between them. Detachable layer contains an ethylene-propylene copolymer, or a mixture of polyethylene and other olefin which forms incompatible composition or mixture.

Another type provides exfoliation of the bonding described in the patent application of the applicants 0514785.5 the United Kingdom under consideration at the same time with this.

There is a continuing need for improved products in the field of adhesive and peelable film structure. In particular, there is still a need for a film structure, which has an adhesive outer layer, which is well glued with itself or other surfaces in a wide range of temperature/or pressure, and that may flake off within one layer of the multilayer film and which nevertheless retains acceptable characteristics for the final film in regard to at least one property selected from sheen, turbidity, opacity, suitability for use in printing and friction coefficient. In particular, there is a need for peelable films, which can easily be opened without creating a gap in the "z-direction". If subjected to tensile polyolefin films, particularly biaxially oriented polypropylene films, the mechanical strength of the joints bonding often exceeds the mechanical strength of the film itself, and therefore, when the opening glued packaging to be separated will not only seam bonding. Usually at the opening of the gap is distributed in an uncontrolled manner throughout the film. Peelable films are films that are being glued, can be mechanically separated without damage or destruction of the film itself. Peelable adhesive layers usually must be good adhesive power, and to provide a controlled opening of the package or packaging. Peelable goryachekluchevskaya film can be formed by obtaining a film coated in d is the query result of the coating biaxial oriented polypropylene film, obtained in the form of a multilayer film, comprising a middle layer of homopolymer polypropylene and the surface layer obtained on each side or main surface of the middle layer, with gracelewis coating. Such surface layers can be obtained from the copolymers, such as copolymers of propylene and ethylene, including the block copolymer. The surface layer produced during the manufacture of the film in the form of a coating applied from the melt appears to be being applied in the form of a coating, allows to obtain providing exfoliation of the bonding due to the presence in the coating from the melt, incompatible phases. This limits the plane of the fracture by the coating from the melt, removing it from the middle layer, which eliminates any possibility of rupture of the bonding on the middle layer. The result is that the bonding is weaker in comparison with the conventional bonding, but allows you to have the same bond strength in all possible places and does not break.

The gap in the z-direction destroys the integrity of the multilayer film during stretching of the film in different directions at the site of adhesion. Film with a gap in the z-direction is not simply divided by line gluing. Instead, the separation or gap rasprostranyautsa and other film layers. Packaging that has been divide in the z-direction, it is difficult to re-seal properly, thus, hinders the ability of the packaging to maintain freshness or integrity of its contents. When possible exception of the gap in the z-direction of the packing will be easy to re-fold and stick together when using simple mechanical means such as a clamp or adhesive label.

The purpose of the invention is to offer an adhesive polymer film, characterized by the ability to exfoliate. Another objective of the invention is to offer a thermoplastic film structure including the adhesive outer layer, which is well glued in a wide temperature range. An additional objective of the invention is to offer a thermoplastic film structure including the adhesive outer layer, which in the case of bonding will be easy to open without any gap in the z-direction. An additional objective of the invention is to offer such films for wrapping and providing exfoliation of the bonding in the packaging of goods or products.

Currently, it was found that the peelable adhesive film can be obtained in the form of a multilayer film, in which the block copolymer component is present in the means of the th layer. It seems that the film of the invention exfoliate on a middle layer, although the invention described herein is not bound or limited by this theory.

Biaxial oriented film comprising the block copolymer of the middle layers, known in connection with multiple applications. For example, in document WO-A-2005/033195 describe high impact copolymer film showing the presence of certain characteristics on the rate of passage of water vapor, which, allegedly, are suitable for use in applications in the packaging of food products. Such films for such applications describe in the document EP-A-0987290. Another film for the packaging of food products, using the characteristics of the block copolymer films for the passage of gas and vapor, described in document WO-A-2004/056567. However, the use of the block copolymer material in the middle layer of a multilayer film provided with an adhesive outer layer, where the glued film do peelable a block copolymer middle layer, up to the present time has not yet been implemented.

In accordance with this invention features an adhesive and peelable film comprising a block copolymer substrate and an adhesive coating and/or surface layer.

Film and the gain is preferably a multilayer film, comprising a block copolymer middle layer and at least one adhesive surface layer. The surface layer may be adhesive in nature, or it can be printed on adhesive coating.

Preferably, the adhesive coating is applied at least on one surface of the layer.

The term "adhesive" refers to gracelewis, holodnokrovnymi, adhesive under pressure or any suitable combination thereof. In most applications will be used gorjacheljushchiesja film.

The block copolymer substrate or intermediate layer preferably constitute more than 90%, more preferably more than 95%, even more preferably more than 97,5%, from total film thickness.

In one embodiment of the invention the middle layer consists solely of the block copolymer substrate. In alternative implementations for receiving the medial layer of the block copolymer substrate can be mixed with one or more other suitable materials provided that the middle layer will retain its characteristics of otseivaemogo.

The middle layer can be nesperennub or can be foamed in the case of the desirability of an opaque film.

Adhesive and peelable film structure corresponding to the present invention, t is the train may include one or more intermediate layers, located between the middle layer comprising a peelable block copolymer substrate and the adhesive outer layer.

One advantage of the present adhesive and peelable films consists in the passing of exfoliation on the middle layer, which gives the manufacturer the freedom to adapt the superficial layer (s) and/or intermediate layer (s) and/or coatings (coatings) in accordance with production requirements, for example with respect to gloss, opacity, opacity, suitability for use in printing, coefficient of friction and the like.

Films of the invention typically will find application in the packaging of articles of Commerce, such as in the areas of application packages for stop and packaging for products in the container.

In accordance with the present invention serves glued packaging derived from a polymeric film comprising the block copolymer substrate and on the substrate an adhesive coating and/or surface layer, while the packaging produced by wrapping the film around the pack the product in such a way as to obtain at least one region of overlap of the film, and graceschreiner the resulting overlapping sections of the film with each other to obtain at least one glued the field of packaging, and the glued area with the society can be opened in the separation of the overlapping sections of the film manually what achieve without significant rupture in the glued area or in its vicinity.

Without wanting to be bound by theory it is possible to say that probable, apparently, is to give the block copolymer substrate desirable otseivaemogo in the pass of exfoliation gracekennedy film from my neighbor on the overlap in the form of exfoliation within the block copolymer middle layer film.

Preferably the polymer film is a multilayer film comprising the block copolymer substrate and at least one surface layer of a different material. At least one surface layer may be a polymeric material and may contain a homopolymer and/or copolymer materials, and may be a mixture of two or more such materials. The surface layer can be obtained on the substrate in the joint extrusion, lamination or any other suitable method. Preferably the surface layer is a product of co-extrusion. The surface layer can also be obtained from peelable material, for example of the block copolymer material. Alternatively, the surface layer can be neoslavery and, for example, can have a block copolymer structure, e.g. the measures of the structure of the statistical copolymer, homopolymer structure or a suitable mixture of materials.

The presence of the surface layer can contribute to the realization of the invention in its preferred aspects, because it will be possible to prevent or hinder the spread of exfoliation, initiated in the middle layer, for example between two block-copolymer components, outside of the middle layer. Distribution of exfoliation of the superficial layers of the film can result in tearing of the film, but not peelable film.

In accordance with this invention in one of its preferred aspects glued offers packaging derived from a polymeric film comprising the block copolymer substrate and podoski at least one surface layer, the surface layer obtained from the adhesive material, or otherwise, on it put a sticky coating, and packaging get in the wrap film around the pack the product in such a way as to obtain at least one region of overlap of the film, and bonding the resulting overlapping sections of the film with each other to obtain at least one glued packaging, while the glued area on the merits can be opened in the separation of overlapping sections captured and manually what achieve without significant rupture in the glued area or in its vicinity.

Preferably the adhesive material and/or adhesive coating is gracelewis material, and the overlapping sections of the film are glued to each other by way of graceschreiner.

Preferably, the film used when getting stuck together packages of the invention includes a block copolymer substrate, at least one surface layer and the surface layer gorjacheljushchiesja floor.

In the General case, in order to facilitate the manufacture of the film will include the substrate in the form of a block copolymer middle layer enclosed in a sandwich structure between the surface layers of the same material, the surface layers obtained on the substrate, the co-extruded with her, and gorjacheljushchiesja coating on one surface, preferably on only one surface of the resulting film.

Glued packaging of the invention is preferably produced by cutting the sheet of polymer film from the film blade and wrap the cut sheet of polymer film around the product to obtain a film sleeves with overlapping wrap the edges and gluing the overlapping edges to obtain bonding, tight on perime the Roux. Thereafter, the sleeve is preferably sealed to each edge and glued together to obtain the envelope or packet gluing.

One specific application of the film and glued packaging of the invention is a packaging for a stop.

Foot pre-cut paper for photocopiers, computers, printers and other devices most often Packed for transportation, storage and retail sale in packaging for the feet, made of different wrapping materials. Data wrapping materials have traditionally been the paper, film, plastic or laminated film material paper/plastic.

Wrapping materials protect the wrapped paper product from physical damage or the ingress of moisture during transportation and storage. Wrapping materials also protect the wrapped product from physical damage during repeated handling and storage on the shelves at retail.

When allocating stop moving from paper boxes for larger users to the wrapped feet for sale in individual packages containing, for example, 500 sheets. This distribution stop paper makes all the more significant requirements of the wrap due to more frequent loading and unloading operations for the individual stop. Increased the number of loading-unloading operations to stop resulting in more frequent printing packaging to stop damage to the wrapped paper product as a result of moisture, tear, or the appearance of a slight curl to the paper - physical damage, which ultimately leads to zazhevyvaya paper in the printer or a copying machine of the end user. However, the resulting ability of the package to avoid damage resulting from handling means and more difficulties at the opening of the Packed product.

One way around this problem would be the availability of bonding that had a mechanical strength sufficient to maintain the bonding intact during storage and transportation up to the moment when the container or wrapper will need to be open, but the package will remain suitable for manually opening on the site of a bonding or in its surroundings without any risk of damaging the wrapped paper product.

The invention is particularly well suited for use in the field of technology packages to stop. Thus, in accordance with the invention serves glued packaging article is p, where the packaged product is the foot of paper.

Films of the invention are also particularly well suited for use in applications packaging for products in the container.

The block copolymer substrate preferably contains at least one olefinic component. More preferably there are at least two olefinic component and a block copolymer at least partially receive the result of the block copolymerization of one olefinic component or mixture of olefinic components with other olefinic component or mixture of olefinic components. For example, a block copolymer, the substrate can include polypropylene and polyethylene.

In addition, in accordance with the present invention glued offer a package that includes the appropriate foregoing polymer film coated on its surface with a layer of the printed image using at least one printing ink.

Film or surface layer of the film may also contain additional materials such as antiadhesive additive, cloud emulsions, fillers, UV absorbers-rays, suturing, dyes, wax and the like.

The film of the invention can be further treated by corona discharge, for example, to improved what I absorbency of the ink film or surface layer of the film.

The substrate film may contain a mixture of the block copolymer substrate with another polymeric material such as polyethylene, polypropylene, mixtures thereof and/or other known polyolefins.

The polymer film can be obtained by any method known state of the art, including the following, but not limited to: receiving sheet watering from the solution, obtaining a film by extrusion through a slit die head or getting film extrusion blown. The invention may be particularly well suited for use in the case of films, including foam or newspring polypropylene film comprising a middle layer of a block copolymer of polypropylene/polyethylene and surface layers having a thickness substantially less than the thickness of the middle layer, and received from, for example, random copolymers of ethylene and propylene or statistical terpolymers propylene, ethylene and butylene. The film may include a film of biaxially oriented polypropylene (DOP), which can be obtained in the form of a biaxial oriented films, riverstate in both directions using essentially the same degree of stretching in the longitudinal direction and the transverse direction, or they may be biaxial oriented linkami, neravnopilchatymi in both directions, where the film is much more oriented in the same direction (longitudinal direction or the transverse direction). You can use sequential stretching, in which the heated rolls carry out the stretching of the film in the longitudinal direction, and then to implement the stretching in the transverse direction using a furnace with serialno frame. Alternatively, you can use simultaneous stretching, for example, using the so-called bag-of-way or stretching on the tentering frame with simultaneous extraction.

The films used in accordance with the present invention may have a wide range of thicknesses in accordance with the requirements of the application. For example, they may have a thickness in the range of from about 10 to about 240 microns, and preferably a thickness of from about 50 to about 90 microns.

The corresponding invention a multilayer film comprising at least a substrate layer and a surface layer, the surface layer is preferably suitable for use in printing printing inks. The surface layer has a thickness in the range from about 0.05 microns to about 2 microns, preferably about is about 0.1 μm to about 1.5 μm, more preferably from about 0.2 μm to about 1.25 μm, most preferably from about 0.3 microns to about 0.9 µm.

Now the invention will be more specifically described by referring to the following examples.

EXAMPLE 1

Getting film

Three-layer polymeric sleeve received in the joint extrusion of the medial layer (polypropylene homopolymer in the comparative example and of the polypropylene-polyethylene block copolymer in the example, corresponding to the invention), a layer of terpolymer polyethylene/polypropylene/polybutylene (statistical copolymer) as a surface layer on one side of the middle layer and the layer of a mixture of statistical copolymers of polypropylene/polyethylene and polypropylene/polybutylene as a laminating layer on the other side of the middle layer. The sleeve has cooled and then re-heated before inflating to obtain a three-layer biaxial oriented film sleeves. After this film sleeve clenched and eliminirovali to obtain a laminated film comprising an inner lamination layer with thickness equal to approximately 0.7 μm, a middle layer with a thickness in the range from approximately 28 to 29 μm on both sides of the laminating layer and the surface layer of ateisticheskogo of terpolymer thickness, approximately 0.3 microns.

Thereafter, the laminated film was applied a primer in the form of polyethylenimine primer on one side of the acrylic. The composition of the acrylic coating was in the form of a production lot when using as the source of the acrylic resin material present in the coating WB1240. WB1240 represents the dispersion of the acrylic copolymer in water, supplied by UCB Surface Specialties, located at Rue d'anderlecht 33, B-1620 Drogenbos Belgium, and used the number was that which was necessary to obtain the film of the coating composition, in which WB1240 comprised of 92.5% (mass.) from the coverage. The coating composition also includes a 0.25% (wt.) polymetylmetacrylate particles as antiadhesive and 7.5% (mass.) Carnauba wax.

The compositions of the laminated films without the applied coating are presented in table 1:

Table 1
FilmThe middle layerThe inner layerThe outer layer
Example 1The block copolymer (PP/PE)Laminating the polymer (a mixture of PE/PP, PP/PB)Comparative example 1AThe homopolymer (PP)Laminating the polymer (a mixture of PE/PP, PP/PB)Statistical terpolymer (PP/PE/PB)

Both films have demonstrated satisfactory performance in the field of application packages for the stop, as evidenced by measurements of their brightness, turbidity when observed under high and low angles, adhesion center, adhesion on the side of the adhesion and friction, all of which were carried out in accordance with the standard method.

After that film coated was subjected to gracekeown when to wrap their feet paper to get glued packaging for the foot. According to the comparative example, obtained by gluing films undergo a gap, as in the example illustrating the invention - splitting.

1. Adhesive and peelable film comprising a block copolymer flaking middle layer, constituting more than 95% of the film thickness, and at least one adhesive, no peeling of the surface layer containing terpolymer polyethylene/polypropylene/polybutylene, where the specified surface layer has a thickness of from about 0.1 microns to about 1.5 microns.

2. Plank who according to claim 1, where the surface layer is adhesive in nature.

3. The film according to claim 1, where the surface layer is applied an adhesive coating.

4. The film according to claim 3, where the adhesive coating and/or surface layer are goryachekluchevskaya.

5. The film according to claim 1, where the block copolymer middle layer contains at least one olefinic component.

6. The film according to claim 5, where there are at least two olefinic component and a block copolymer at least partially receive the result of the block copolymerization of one olefinic component or mixture of olefinic components with other olefinic component or mixture of olefinic components.

7. The film according to subparagraph 5 or 6, where the block copolymer middle layer contains polypropylene and polyethylene.

8. Foamed film according to any one of claims 1 to 7.

9. Nespevnena film according to any one of claims 1 to 7.

10. The film according to any one of claims 1 to 9 in the form of packaging for a suitable product.

11. The film according to any one of claims 1 to 10 printed on its surface layer image using at least one printing ink.

12. Glued packaging obtained from the polymer film according to any one of claims 1 to 11, with the packing produced by wrapping the film around the pack the product in such a way as to obtain at least one area of the overlapping film and graceschreiner the resulting overlapping sections of the film with each other to obtain, at least one glued packaging, and glued the region, essentially, can be opened in the separation of the overlapping sections of the film manually, which achieve without significant rupture in the glued area or in its vicinity.

13. Glued pack of 12, where the polymer film is a multilayer film comprising the block copolymer substrate and at least one surface layer of a different material.

14. Glued packaging indicated in paragraph 13, where at least one surface layer are selected from polymeric materials, homopolymer and/or copolymer materials and mixtures of two or more such materials.

15. Glued pack of 12 obtained by cutting the sheet of polymer film from the film blade and wrap the cut sheet of polymer film around the product to obtain a film sleeves with overlapping wrap the edges and gluing the overlapping edges to obtain bonding, tight on the perimeter, then the sleeve is preferably sealed to each edge and glued together to obtain the envelope or packet gluing.

16. Glued packaging obtained from the polymer film according to any one of claims 1 to 11, comprising a block copolymer substrate and on the substrate, at least one surface layer, and the surface is the surface layer obtained from the adhesive material or otherwise, it is applied an adhesive coating, moreover, the packaging of it is produced by wrapping the film around the pack the product in such a way as to obtain at least one region of overlap of the film and bonding the resulting overlapping sections of the film with each other to obtain at least one bonded region to the package and glued the region, essentially, can be opened in the separation of the overlapping sections of the film manually, which achieve without significant rupture in the glued area or in its vicinity.

17. Glued pack of clause 16, where the adhesive material and/or adhesive coating is gracelewis material, and the overlapping sections of the film are glued to each other by way of graceschreiner.

18. Glued pack of 17, where the film used when getting glued packaging, includes a block copolymer substrate, at least one surface layer and the surface layer gorjacheljushchiesja floor.

19. Glued pack of P16, obtained by cutting the sheet of polymer film from the film blade and wrap the cut sheet of polymer film around the product to obtain a film sleeves with overlapping wrap the edges and gluing the overlapping edges to obtain bonding, tight on the perimeter, the donkey this sleeve is preferably sealed to each edge and glued together to obtain the envelope or packet gluing.

20. Glued pack p where glued packaging is the packaging for the foot.

21. Glued pack p where glued packaging is the packaging for the product in the container.

22. Glued pack p, where the block copolymer substrate or the middle layer contain at least one olefinic component.

23. Glued packaging on p.22, where there are at least two olefinic component and a block copolymer at least partially receive the result of the block copolymerization of one olefinic component or mixture of olefinic components with other olefinic component or mixture of olefinic components.

24. Glued packaging for item 23, where the block copolymer substrate contains polypropylene and polyethylene.



 

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35 cl, 6 dwg, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: overall, the invention relates to production of foamed thermoplastic from an aqueous dispersion for use in absorbent materials. The method involves adding at least one foam-stabilising surfactant to an aqueous dispersion which contains a thermoplastic resin, water and a stabilising agent for dispersion systems to form a mixture. Fibre is then added to the mixture which is then foamed. Further, at least a portion of water is removed from the foam to obtain foamed material with a non-cellular fibrillated morphology. The foamed material with average density between approximately 0.02 g/cm3 and approximately 0.07 g/cm3 may be used in absorbent articles.

EFFECT: obtained foamed material has good tensile strength in wet or dry conditions and excellent quality with respect to collapsing in wet conditions compared to cellulose based fibre systems.

35 cl, 6 dwg, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: foamed material consists of a single-component, moisture-curable composition containing at least one polymer P, having isocyanate groups and/or alkoxy silane groups, 10-60 vol. % of at least one gas and 10-30 wt % soot per total weight of the single-component foamed material which is curable in a moist medium. Application of the obtained foamed material is carried out primarily at temperature in the range of 10-40°C. The degree of foaming of the composition and, consequently, gas content of the single-component, moisture-curable foamed material varies during its application.

EFFECT: obtaining single-component, moisture-curable foamed material which can be used as an adhesive or a sealant/packing material for producing coatings or filling hollow structures with foamed material, particularly vehicles.

20 cl, 4 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to methods of producing microporous polyolefin membranes used as separators in accumulator batteries and in various filters. The method of producing the membranes comprises the following steps: mixing molten polyolefin and a membrane-forming solvent, extrusion of the obtained melt and cooling the extruded article to a gel form, first biaxial stretching at temperature ranging from crystallisation point of the polyolefin dispersion of +15°C to crystallisation point of the dispersion of +40°C, removing the solvent, second monoaxial stretching of the membrane with removal of the solvent at temperature ranging from crystallisation point of the polyolefin dispersion to crystallisation point of the polyolefin dispersion of +40°C.

EFFECT: obtaining microporous polyolefin membranes having large pore diametre, excellent air-permeability, mechanical strength and compression strength.

6 cl, 1 tbl, 17 ex

FIELD: personal use articles.

SUBSTANCE: unitised packaging container for sheet material containing several packs of paper wrapped into their own wrapper, which are placed into common protective wrapper, in which plastic, mixture of polymers or another suitable material that moderates penetration of moisture is added to at least the main paper layer of wrapper. At the same time unitised packaging container includes material of protective wrapper and wrapper material used for packs of paper, which are made by adding plastic, mixture of polymers or other suitable material to both in such an amount that speed of water vapours penetration through protective wrapper and wrapper as a whole makes less than approximately 50 g/m2/day, according to calculation as per ISO Standard 2528:1995.

EFFECT: development of cheap unitised packaging container, which provides good protection of sheets and is convenient to carry.

23 cl, 12 dwg

FIELD: textile, cotton.

SUBSTANCE: carton is intended for the packaging and can be used, for example, in the cellulose and cotton industry. On at least one of the carton's surface there are micro-lamellate cellulose particles. These particles have average volume size of the particles from approximately 20 micron to approximately 150 micron, average numerical size is from approximately 5 micron to approximately 20 micron and 95-percent average volume size not exceeding approximately 300 micron. This carton is used to produce package material. The mentioned carton can contain covering layer including the pigment. The covering layer is made of the composition containing the mentioned above micro-lamellate cellulose particles.

EFFECT: increases smoothness, toughness at the bend sides and improves the strength of the carton; it also increases its non-transparency and chalking of its covering.

24 cl, 8 dwg, 10 tbl

FIELD: technological processes; chemistry.

SUBSTANCE: package material with volatile corrosion inhibitor has a form of hose, half-hose or canvas with thickness of 80-250 mcm. It includes polyolefin or polyolefin mix and "ВНХ-Л-20" volatile corrosion inhibitor dispersed in "ФМТ" contact corrosion inhibitor at the following component rate, mass % : "ВНХ-Л-20" volatile corrosion inhibitor - 0.13-1.13; "ФМТ" contact corrosion inhibitor - 0.80-2.2; the rest is polyolefin or polyolefin mix. Package material can include both one and several layers due to co-extrusion, pasting, lamination. Tests proved ant-corrosion effect of the film, particularly in conservation of pipes, steel bridge fastening bolts, steel ball bearing pin rolls (without lubricant). Production conserved by this method is delivered to customer and can resist corrosion for 1 year at least, or can be stored at a heated/cold storehouse (at room temperature of over +5°C and under +55°C) resisting corrosion for up to 5 years.

EFFECT: increased product life span without corrosion.

8 tbl, 11 ex

FIELD: food industry.

SUBSTANCE: invention relates to agent and method for protection of foodstuffs from damage. Agent for protection of foodstuffs from damage represents birch bark extract as a liquid component wherein birch bark is dissolved or forms a dispersed system and wherein the content of birch bark extract and a liquid component is, wt.-%: birch bark extract, 0.01-40, and liquid component, 60-99.99. By other variant the agent used for protection of foodstuffs from damage represents package material comprising a base-forming component and a modifying agent wherein birch bark extract is used in the amount 0.01%, not less, of the base-forming component mass. Protection of foodstuffs from damage is provides by applying the indicated agent possessing high activity with respect to inhibition of growth of different pathogenic microorganisms on surface of foodstuffs or by packing the foodstuff into package material showing the same properties. Invention provides decreasing loss of foodstuffs in storage and transporting. Invention can be used for elevating storage time of sausage, cheese, fresh and processed meat, fish production, fruits, vegetables and so on.

EFFECT: valuable properties and enhanced effectiveness of agent.

7 cl, 13 ex

FIELD: chemical industry; other industries; production of the disposable containers with the latex coating.

SUBSTANCE: the invention presents the disposable molded thermoplastic container for example, the cup, the bowl made out of the foaming polystyrene particles has the latex coating, for example, made out of the latex of the interpolymer of methylmethacrylate and styrene, the latex of the interpolymer of methylacrylate and styrene, the latex of the interpolymer of the acrylic acid and styrene and the latex of the interpolymer of the butadiene and styrene applied on, at least, its internal surface by the dipping, paint-brushing or sputtering methods for the improved strength against leakage and-or the stains formation and-or durability at storage. The coating may be applied on the outer surface of the container for rising the anti-leakage strength and realization of patterning. The invention also considers the method of molding of the container, the article and usage of the container for improvement of the method of storage of the liquid and food substances.

EFFECT: the invention ensures, that the manufactured container, the article and the coating shall improve the storage of the liquid and food substances.

21 cl, 4 ex, 4 tbl

FIELD: packing materials.

SUBSTANCE: invention relates to polymeric films and it can be used to protect ferrous and non-ferrous metals and articles made of said metals from atmosphere corrosion in process of transportation and storage. Proposed packing material in form of polymeric film includes polyolefin with addition of hydrogen absorber, product of company Ciba-SchelfplusO2 2400 to increase barrier for penetration of oxygen, high density polyethylene, grade FL5580 produced by Borealis company featuring high barrier properties to penetration of water vapors, and modifier. Six-component complex of volatile corrosion inhibitors in form of superconcetrate of Cesa-Cor 9103 is used as modifier which contains no nitrates, and contact inhibitor cyclohexylamine chromate at the following ratio of components, mass %: six-component complex of volatile corrosion inhibitors in form of superconcentrate Cesa-Cor 9103-0.1-5.0; contact inhibitor - cyclohezylamine chromate 1.0-2.0; oxygen absorber SchelfplusO2 - 2.0 - 10.0; polyethylene FL 5580 - 10.0 - 40/0; polyolefin - the rest. When using proposed packing material, active inhibitors, evaporating, migrate in to all cavities and irregularities with subsequent condensing on metal surface. If moisture gets onto surface, molecules of inhibitor hydrolyze and protective ions are attracted to surface of metal, thus forming thin protective film. Packing material with volatile corrosion inhibitor can be used in transportation and storage of ferrous and non-ferrous metals and their alloys. Moreover, complex of volatile corrosion inhibitors migrate on protected surface quicker than other similar inhibitors, thus creating high pressure of protective vapors.

EFFECT: improved corrosion protection of metals.

4 cl, 3 ex

FIELD: food industry.

SUBSTANCE: invention is designed for packing boiled ham or pickled foods in casing non-soluble in water which can be used in process of boiling under specific conditions. Proposed casing is essentially nontubular flat film permeable for gas steam and/or smoke to which net can be applied from side opposite to food product to increase strength. Film is made in form of thin-walled fibrous film, density from 3 to about 120 g/sq.m with antiadhesive coating on at least one side, usually on side facing food product. Antiadhesive coating is made of material safe from point of view of food law ensuring against interaction of food product with packing casing at subsequent treatment, particularly, in process of cooking. Proposed casing is easy to treat and store and has low cost of making. Method of manufacture of casing is described in invention.

EFFECT: improved quality of packing casing for food products.

23 cl

The invention relates to the pulp and paper industry and can be used in the manufacture of paper for corrugated cardboard

The invention relates to the pulp and paper industry and can be used in the manufacture of cardboard for flat layers of corrugated paperboard used in the manufacture of small packagings

The invention relates to a gas-tight, in particular, to kislorodopronitsaemaya packaging material containing as the basis of high-density (i.e
Multilayer bottle // 2415015

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer bottle intended for beer, tea, juices or carbonated drinks. Proposed bottle comprises inner and outer layers, each made from polyether (A), and, at least, one barrier layer arranged there between. Polyether (A) is thermoplastic resin produced by polymerisation of dicarboxylic acid containing 80 gram-mol or more of terephthalic acid with diol component containing 80 gram-mol or more of ethylene glycol. Barrier layer contains the mix of polyamide (B) and polyamide (C). Polyamide (B) is produced by polycondensation of diamine component containing 70% gram-mol or more of m-xylylenediamine with dicarboxylic acid containing 70 gram-mol or more of α,ω-linear aliphatic dibasic acid with C4-C20. Polyamide (C) consists of poly(6-aminocaproic acid) and/or poly(hexamethylene diamine of adipinic acid), and amorphous semi-aromatic - copolymer of hexamethylene isophthalamide/hexametgyleneamide of terephthalic acid.

EFFECT: stronger interlayer adhesion, higher resistance to lamination, good gas tightness.

12 cl, 2 tbl, 8 ex

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