Elastomer films with fragile non-sticking surface layers

FIELD: process engineering.

SUBSTANCE: this invention relates to non-sticking multilayer elastomer film and to method of its production. Proposed film comprises first fragile polymer film layer that may not expand to over 110% of its initial size without breakage or cracking, and second elastomer layer. Said first layer is bonded with first surface of said second elastomer layer. First layer represents polystyrene while second layer is selected from the group comprising block-copolymer of styrene and elastomer of polyolefin. Multilayer may be activated by breaking first fragile polymer layer and imparting elastoplasticity to multilayer film. Film layer that may expand to approx. 150% of its initial size and recover after expansion to not over 120% of its initial size. Proposed method comprises producing non-sticking multilayer film layer and activating non-sticking multilayer film with destruction of fragile polymer film layer along with imparting elastoplasticity to multilayer film.

EFFECT: possibility to roll elastomer film and store without its sticking.

19 cl, 8 dwg, 2 ex

 

The technical field

The present invention relates to nesipuosia multilayer elastomeric films and relates to methods for nokiausers multilayer elastomeric films.

The level of technology

Elastomeric materials for a long time was highly valued for its ability to expand to cover or wrapping of a larger object, and then compressed to obtain a wrapping object with a tight wrapping. This quality has been appreciated for centuries, and a significant number of early research in Europe was associated with the search for rubber trees for latex.

In recent years, natural rubber was supplemented and replaced by the synthetic elastomeric polymer materials. State of the art well-known compounds such as polyurethane rubbers, styrene block copolymers, ethylene-propylene rubbers and other synthetic polymeric elastomers.

Elastomeric materials can take a wide range of forms. The elastomers can be molded in the form of threads, cords, tapes, films, fabrics and other various forms. The form and structure of the elastomeric material defines the proposed end use of the product. For example, the elastomers are often used in garments to receive the deposits of dense wrapping, such as in clothing for fitness and recreation. Elastomers can also form an elastic, but effectively impermeable layers, such as in cuffs items warm-keeping service, designed to preserve body heat. In these applications most often the elastomer is in the form of threads or fibers, which are included in the fabric of the garment.

One example of the type of garment, which are of great importance as wrapping and characteristics of impermeability, are hygiene products such as diapers. Elastomeric materials used at the waist and around the leg holes and fasteners (diaper) or sides (for garment concerning the type of cowards). Elastomeric materials in these areas improve the overall wrapping garment, and also makes it much easier as donning and removing the garment. Elastomeric materials also act as an elastic impermeable layers, which improves the sealing ability of the garment while simultaneously still providing comfort and freedom of movement for its owner.

In a hygienic product elastomer may be in the form of yarns, fabrics or films. The use of elastomeric filaments can lead to problems when linking garment, POSCO is ECU in the production method of the thread should be used as one component among many. These threads can also be weakened, and they have a tendency to rupture, which can lead to loss of elasticity even in the presence of excess threads. With elastomeric fabrics in the manufacturing method to deal somewhat easier, but the fabrics have a tendency to purchase high cost in connection with the materials of the raw materials, and due to the cost of production of the fabric. In comparison with the threads of the elastomeric film is easier to use in production, and in comparison with elastomeric fabrics making them less expensive. Elastomeric films also tend to demonstrate greater strength in comparison with yarns or fabrics, and they are less likely to malfunction during use.

However, the lack of elastomeric films is that the polymers used to obtain films are inherently tacky or sticky. In the case of extruded elastomeric film and reeling it in a roll film tends to stick to itself or "sticking together", which, therefore, leads to the difficulty or impossibility of unwinding. Adhesion becomes more pronounced when the film is subjected to ageing or keep it in a warm environment, such as inside a warehouse long-term storage.

The problem of elipanelosymomyv solved in several ways. In the film you can enter substance, caking, which are usually a powdered inorganic materials such as silicon dioxide or talc. Substances that prevent the sticking, you can also sprinkle outer surface of the extruded film during formation of the film. However, to reduce the adhesion to an acceptable level of substances that prevent adhesion, it is necessary to add large quantities, and high levels of substances that prevent adhesion have an adverse impact on the elastomeric properties of the film. Another way to reduce clumping is roughened film surface, such as the embossing film, which leads to the reduction of contact between the surfaces of the wound in the roll film and the inclusion of small air pockets, which helps reduce clumping. Unfortunately, this option also tends to create sophisticated weakened areas of the film, which are then subjected to respiram and destroyed when the stretching of the film. Another way to reduce clumping is the introduction of a roll between the wound layers of film physically impermeable layer, such as a coating film. The coating film is then removed by unwinding a roll of film for subsequent reprocessing is I. The coating film is usually discarded, although it leads to the creation of waste and significant additional costs for the manufacturer. Another way to reduce the adhesion of the elastomeric film is in co-extrusion with the application of a very thin outer layer, also called "surface layers" or "top layer"of the extendable or less of elastomeric nokiausers polymer on the surface of the elastomeric film. Neslepauline polymers suitable for use in the surface layers include polyolefins, such as polyethylene or polypropylene. Such polyolefin surface layers are extendable, but elastomere materials. In General, they have little impact on the elastomeric properties of the film, as they constitute only a small fraction of the total composition of the film. However, when stretching or "activating" the first time elastomeric film in General, these polyolefin surface layers will stretch and acquire irreversible deformation. When eliminating the impact of tensile forces on the activated elastomeric film, an elastomeric core will be compressed as it happens usually. Stretched surface layers that are not elastomeric, instead, will shrink by Maracatu core and create microtexturing surface.

A need remains effective in the manufacture of elastomeric film, which can be winded in a roll and stored without clumping. This film should not have degraded elastomeric properties, should not lead to the creation of unnecessary waste and production costs and after activation must be attractive surface texture.

Summary of invention

In one embodiment implementing the present invention relates to noslepumaina multilayer film. Nokiausa multi-layer film includes a first brittle polymer film layer and the second elastomeric polymer film layer, where the first polymer layer connects with the first surface of the second polymeric film layer. Nokiausa a multilayer film can be activated with the destruction of the first brittle polymer layer and making a multilayer film elastomeres.

In yet another variant implementation of the present invention relates to noslepumaina multilayer elastomeric film. Nokiausa multilayer elastomeric film includes a first brittle polymer film layer and the second elastomeric polymer film layer, where the first polymer layer connects with the first surface of the second polymeric film layer. A multilayer film triggers the destruction of the first brittle polymer film layer and making a multilayer film elastomeres.

In yet another variant implementation of the present invention relates to a method for noslepumaina multilayer elastomeric film. The method includes connecting the first brittle polymer film layer with the first surface of the second elastomeric polymer film layer to obtain a multilayer film. After that, a multilayer film can activate with the destruction of the first brittle polymer film layer and making a multilayer film elastomeres.

In yet another variant implementation of the present invention relates to a method for noslepumaina multilayer elastomeric film. The method includes obtaining nokiausers multilayer film layer comprising a first brittle polymer film layer connected with the first surface of the second elastomeric polymer film layer. After that nokiausa activate a multilayer film with the failure of brittle polymer film layer and making noslepumaina multilayer film elastomeres.

Subject to the following further detailed description of the invention will be obvious and additional implementations of the invention.

Brief description of drawings

The invention will be more fully understood from consideration of the drawings, among which

figa-1d illustrate several possible structures of many what sloinoi elastomeric film of the invention;

figure 2 is a schematic illustration of a typical method of extrusion through a flat die head;

figure 3 is a schematic illustration of a typical method of applying a coating by means of extrusion;

figure 4 is a schematic illustration of a typical method of adhesive lamination;

figure 5 illustrates a micrograph of inactivated film of the present invention;

figa and 6b illustrate micrograph doped film of the present invention;

figa and 7b illustrate micrograph of comparative unactivated and activated films with extendable polyolefin surface layers; and

figa and 8b illustrate micrograph of comparative unactivated and activated films with the inclusion of substances that prevent adhesion.

Detailed description of the invention

The inventors have found that the use as a layer connected to the surface of the elastomeric film layer, fragile nokiausers polymer instead lengthen the polymer surface layer can provide a radical reducing or eliminating clumping experienced elastomeric film. One or more brittle polymer film layer eliminates the need for UDL is applied polyolefin surface layer and does not create microtexture on the surface of the film. It may seem unexpected, but these multilayer films can be easily activated by known methods, which ensure the failure of brittle polymer film layer and making a multilayer film elastomeres. In addition, it may seem unexpected, but as the layers of the elastomeric film can be used one or more brittle polymer film layer without significant deterioration of the elastomeric properties of noslepumaina multilayer elastomeric film. In addition, it may seem unexpected, but brittle polymer film layer, whether it is intact or destroyed, improves tensile strength tearing noslepumaina multilayer elastomeric film. Nokiausa multilayer elastomeric film can be winded in a roll either before or after it is activated and stored at normal room temperature for extended periods of time without significant clumping.

For the purposes of this description, the following terms shall be determined as follows:

* "Film" refers to a material leaf-like form, where the size of the material in the directions of the x (length) and y (width) substantially exceeds the size in the z-direction (thickness). The films have a thickness in the z-direction in the range from approximately 1 μm to approximately 1 mm

* "Laminate" as the name of sushestvitelnoe which indicates a layered structure of leaf-like materials, stacked and connected together such that the layers had essentially the same length across the width of the narrowest sheet of material. Layers can include film, fabric or other materials in sheet form, or combinations thereof. For example, the laminate may be a structure including the film layer and the cloth layer, connected to each other by their width in such a way that, under normal use case two layers remained United as a single sheet. The laminate can also be called a composite or material with the coating. "Laminate" as a verb refers to the method by which such a layered structure get.

* "Joint extrusion" refers to a method of obtaining a multilayer polymer films. In the case of obtaining a multilayered polymer film according to the process of co-extruding each polymer or polymer mixture comprising the film layer itself is melted. Molten polymers can be layering the inside of the extrusion head, and the layers of molten polymer films ekstragiruyut from the extrusion head essentially simultaneously. In polymer films obtained by the process of co-extrusion, the individual layers of the film together, but they remain essentially unmixed and clearly distinguished in the form of layers in the film. Dunn is th case is opposed to mixed multi-component films, where the polymer components are mixed to obtain essentially of a homogeneous mixture or a heterogeneous mixture of polymers which ekstragiruyut in a single layer.

* Lamination by extrusion or coating by extrusion" refers to the ways in which the film of molten polymer ekstragiruyut on a solid substrate in order to obtain on the substrate coating in the form of a polymeric film and to connect the substrate and the film.

* "Tensile" and "restore" are descriptive terms used to describe the elastomeric properties of the material. "Extensible" means that the material under the action of tensile forces without rupture to take up to a specified size, far exceeding its original size. For example, such as tensile could be described material, which has a length of 10 cm, and which under the action of tensile forces without rupture to take up to a length of approximately 13 see "Recoverable" means that the material under the action of tensile forces without rupture extends to a certain size, far exceeding its original size, while eliminating the tensile forces will return to its original size or to the specified size, which the good is appropriately close to the original size. For example, as recovered could be described material, which has a length of 10 cm which under the action of tensile forces without rupture to take up to a length of approximately 13 cm, and which returns to a length of approximately 10 cm, or to a specified length, which is suitably close to 10 cm

* "Elastomer" or "elastomeric" refers to a polymeric material that can be stretched at least to approximately 150% of their original size and are then restored to no more than 120% of its original size in the direction of the applied tensile forces. For example, an elastomeric film, which has a length of 10 cm, under the action of tensile forces must be stretched at least to about 15 cm, and then at elimination of tensile forces to shrink to no more than approximately 12 see the Elastomeric materials are stretchable and recoverable.

* "Extended" refers to polymeric materials, which can break to stretch, at least up to approximately 130% of their original size, but which are either not recovered significantly, or restored to more than about 120% of its original size, and therefore are not e stomerij in a higher sense. For example, the extendable film, which has a length of 10 cm, under the action of tensile forces must be stretched at least to about 13 cm, and then at elimination of tensile forces or she remains with a length of approximately 13 cm, or restored to a length greater than approximately 12 see Lengthen the materials are loose, but not restored.

* "Fragile" refers to polymeric materials which have high resistance to stretching and without breaking or cracking can not be stretched to more than 110% of its original size. For example, fragile film, which has a length of 10 cm, under the action of tensile forces may not, without break to stretch to more than approximately 11 see Brittle film when Troubleshooting tensile forces are not reversed or reversed only to the minimum extent. Brittle materials are neither tensile nor recoverable.

* "Adhesion" refers to the phenomenon of adhesion of the film to itself when rolled into a roll, folding or other accommodation with direct contact between the surfaces due to the stickiness or tackiness inherent in the very nature of one or more components of the film. Quantitative characteristics of adhesion can be obtained in accordance the with ASTM D3354 "Blocking Load of Plastic Film by the Parallel Plate Method".

* Nesipuosia" refers to a material that does not stick together when placed in direct contact with itself.

* "Surface layer" or "surface layers" refers to a thin outer layers of a polymeric film on one or both sides of the other, the Central core of the polymer film. For example, in the case of the film structure AVA surface layers would be layers A.

* "The core layer or core layers" refers to the inner layer or layers of a polymeric film that are not superficial layers. For example, in a film structure AVA layer represents the core. In a film structure ASWA medullary layers are the layers and C.

* "Activate" or "activation" refers to the way in which to achieve ease of stretching the elastomeric film or material. The most frequently activation is a physical processing, modification or deformation of the elastomeric film. Stretching of the film for the first time is one way to activate the film. Elastomeric material, which was subjected to activation, referred to as "activated". The usual example of activation is inflating a bubble. For the first time, when the bladder is inflated (or "trigger"), the material in the bubble is stretched. If you inflate PU is yr will be difficult, then the face, inflated bladder, often will have to manually stretch nonduty bubble for easy inflation. If pompous bubble to give to deflate, and then inflate it again, then "activated" the bubble will inflate much easier.

* "Film strength" or "mechanical strength" represent the characteristics of the film under tension, measured in accordance with ASTM D-822 "Tensile Properties of Thin Plastic Sheeting". Unless other specified, the "film strength" or "mechanical strength" specifically indicate the limit of the tensile strength and % relative elongation at break.

* Tensile strength tearing" is a property of the film, which determines the ease or difficulty with which the film may be torn, starting with a cut or hole cut in the film. Brittle polymers used in the first polymer film layer or the surface layer, in the case of films and methods of this invention can include any conventional extrudable brittle polymer that can be molded to obtain a film according to the method known state of the art, such as polystyrene, polymethyl methacrylate other acrylic polymers, polyesters, polycarbonates, etc. Without wanting to be bound by theory, the inventors believe that the show is the essential fragility of the required polymer, characterized by a high degree of crystallinity. One brittle polymer which is particularly preferred is vysokokritichnyh polystyrene. For example, suitable for use polystyrene resin, among others, can be obtained from Dow Chemical Company of Midland, Michigan, or NOVA Chemicals Corporation of calgary, Alberta.

As a second surface layer in the case of films and methods of this invention can be used as another layer of brittle polymer film. In the case of on the elastomeric polymer film layer in the core of the film of the invention two brittle polymer film surface layers surface layers may contain the same composition (for example, film AVA) or different compositions (for example, film ABC), the components of the brittle polymer. If nokiausers multilayer elastomeric films, including one surface layer or two of the surface layer, each surface layer of noslepumaina multilayer elastomeric film can be from about 0.5% to 20% of the total weight of the multilayer film, and thus, the core layer(layers) should be approximately 60% to 99% of the total weight of the multilayer film.

The elastomeric polymers used in the second polymeric film layer in the case p is yenok and methods of the present invention, can include any extrudable elastomeric polymer. Examples of such elastomeric polymers include block copolymers vinylsilanes and conjugated diene monomers, natural rubbers, polyurethane rubbers, rubbers based on complex polyester, elastomeric polyolefins and polyolefin blends, elastomeric polyamides, and the like, the Elastomeric film may also contain a mixture of two or more elastomeric polymers, related to the previously described types. Preferred elastomeric polymers are block copolymers vinylsilanes and conjugated diene monomers, such as block copolymers of the AB, ABA, ABC or ASA, where segments And contain arylene, such as polystyrene, and the segments b and C contain diene, such as butadiene, isoprene or ethylenebutylene. Suitable for block-copolymer resin is easily available from KRATON Polymers of Houston, Texas or Dexco Polymers LP from Pencilina, Louisiana.

Nokiausa multilayer elastomeric film of the present invention may include other components, modifying the properties of the film for facilitating processing of film or modifying the appearance of the film. These additional components may be the same or may be different in each existing layer. For example, in order to give the film stiffness and improve the t of its strength properties, with the elastomeric polymer in the core layer of the film can be mixed polymers, such as polystyrene homopolymer or vysokozharoprochnyh polystyrene. As technological additives can be added to the polymer, decreasing the viscosity, and plasticizers. May be added other additives such as pigments, dyes, antioxidants, antistatic agents, additives reduce friction, foaming agents, heat and/or light stabilizers, and inorganic and/or organic fillers. Each additive may be present in one, more than one or all layers of the multilayer film.

Fig.1A-1ddemonstrate several possible variants of realization nokiausers multilayer elastomeric films of the present invention. In each of figs.1A-1d:10is a layer A, which may be brittle polymer film layer;20is a layer, which may be an elastomeric polymer film layer; and30represents a layer, which may be brittle polymer film layer, if it is a surface layer, or an elastomeric polymer film layer, if it is a surface layer or the core layer. Thus, Fig.1Arepresents a film structure AB, Fig.1bis the film structure And The And, Fig.1srepresents a film structure ABC, and Fig.1drepresents a film structure ASVA. Specialist in the relevant field of technology should be understood that the scope of the present invention are more options in the implementation and combination of film layers.

Nokiausa multilayer elastomeric film of the invention can be obtained by any method of film formation. In a specific implementation for noslepumaina multilayer elastomeric film using a process of co-extrusion, such as joint extrusion through a flat die head or receiving film according to the process of co-extrusion blown. Joint extrusion of multilayer films according to the methods using flat-die extrusion head or blown well known.

Fig.2illustrates a schematic view of a typical method of producing a film by the process of co-extrusion through a flat die head. In this example, the film could be a multilayer film AB, ABA, ABC, ASVA or other such multi-layered film containing two or more distinct polymeric composition. One elastomeric polymer composition is melted in a commonly used screw ex is the ruder 10. The extruder12use to melt another polymeric composition. You can add additional extruders14and the like, particularly when three or more polymer compositions. After that, the molten polymer composition is transferred from the extruder to supply16that assembles individual songs for joint extrusion to obtain a multilayer film. After that, the molten polymer ekstragiruyut from the extrusion head18to obtain canvas20. The canvas of the molten polymer20cast on a cooling roller30where the cloth is quickly cooled to obtain a film22. Cooling roller30can be smooth roller, which allows to obtain a smooth film, or an embossing roll, which provides the embossed pattern on the film surface. Upon receipt of the film22the action of the cooling roller30can contribute an optional supporting roller32. After this film22can be bypassed via optional equipment such as guide rollers34and36that facilitate the transfer film from sections of extruded through a flat die head for winding device40where it is wound and stored in anticipation of subsequent re is abode.

In yet another variant implementation for noslepumaina multilayer elastomeric film using a method of coating by extrusion. Such methods of coating by extrusion are well known. Fig.3illustrates a typical method of applying a coating by means of extrusion. Polymeric film layer15ekstragiruyut from the melt through a film-forming extrusion head18and let him fall into the gap between the illustrated metal roller30and rubber roller32. For rapid cooling of the molten polymer film metal roller can be cooled. On a metal platen,30you can also engrave the embossment, if the presence of such a pattern on the resulting film will be desirable. With roller11wound and injected into the gap between the metal and rubber rollers other polymeric film layer noslepumaina multilayer films13. Note that the extruded film layer15can be either brittle polymer film layer, or an elastomeric polymer film layer of the present invention; in contrast, other polymeric film layer13will other polymeric film layer of the present invented who I am. Extruded film layer15and the other film layer13pressed together in the gap to connect the layers. Now nokiausa multilayer film22can be winded in a roll or be bypassed next for carrying out further processing.

Another variant of realization of the method of obtaining noslepumaina multilayer elastomeric film of the invention is adhesive lamination illustrated in Fig.4. One polymer film layer15ekstragiruyut from the melt of the film-forming extrusion head18and let him fall into the gap between the illustrated metal roller30and rubber roller32. For rapid cooling of the molten polymer film metal roller30can be cool. On a metal platen, you can also engrave the embossment, if the presence of such a pattern on the resulting film will be desirable. After cooling and solidification of the extruded film layer perepuskat to the station of adhesive compound, where the film put glue by means of such devices as the spray device35. In an alternative embodiment, the spray device35can spray glue on the incoming polymer film layer13. Another polymer planon the th layer noslepumaina multilayer films 13with roller11injected into the gap37that compacts extruded film layer15and the other film layer13to connect layers. Note that the extruded film layer15can be either brittle polymer film layer, or an elastomeric polymer film layer of the present invention; in contrast, other polymeric film layer13will other polymeric film layer of the present invention. Now nokiausa multilayer film22can be winded in a roll or be bypassed next for carrying out further processing.

To connect polymeric film layers, noslepumaina multilayer films of the invention it is possible to use other known methods of connection. Such methods include thermal welding, ultrasonic welding, the connection by means of calendering, a point of connection and laser welding. In the scope of the present invention also get a combination of connections.

In order to give noslepumaina multilayer film of the invention elastomeres, the film must be activated. Brittle polymer film layer on noslepumaina multilayer film must be subjected to rupture, rupture or cracking to the surface layer has ceased to be subject to yvnym, and the elastomer in the medullary layer acquired the ability to stretch under the cracked parts of the surface layer. The film of the invention can be activated in several ways. For example, the film can be subjected to stretching, folding, drawing notching, embossing, stamping, calandrinia using the roller with a printed pattern or other deformation so that the surface layer was broken. The preferred method of stretching of the film is to use known methods of stretching, such as orientation in the direction of extrusion (MDO), the tension in the frame or step-by-step stretching. In particular, the preferred method of activating the film is the way step-by-step of stretching the film between the rollers which engages, as described in U.S. patent 4144008. Step-by-step stretching has the advantage that the surface layer can mainly be destroyed only in the direction transverse to the direction of extrusion (CD) in order to make the film tensile direction CD, or only in the direction of extrusion (MD) in order to make the film tensile direction MD. The film can also be activated in the directions of both the CD and MD in order to make the material stretchable in both directions.

Near the question was found, that brittle polymer film layer on the elastomeric polymer film layer to prevent sticking of noslepumaina multilayer elastomeric film, if it will be winded and stored for a certain period of time under normal storage temperature. This remains true regardless of whether nokiausa multilayer elastomeric film stored in the activated or non-activated state. You need to understand what can be added and additional stages of processing, such as making holes in noslepumaina multilayer elastomeric film, printing film, film cutting, laminating film additional layers and other such methods, and they fall within the scope of this invention.

The film of the invention can be laminated on the substrate layer by known methods of lamination. The substrate layer may be any extendable leaf material, such as another polymer film, fabric or paper. In one non-limiting implementation layer of the substrate is non-woven fabric. Examples suitable for use of non-woven sheets include non-woven fabric obtained by the method of fastening spinning, by way of carding, by way of aerodynamic processing from the melt and the method of securing water structure is mi under pressure. These paintings may include fibers made from polyolefins, such as polypropylene or polyethylene, polyesters, polyamides, polyurethanes, elastomers, viscose, cellulose, their copolymers or their mixtures. Nonwoven fibrous cloths or non-woven materials that fall within the scope of this invention are paper products such as paper napkin or products like tissue paper, including molded in the form of a Mat of fibers in a pulp or cellulose fibers. Nonwovens can also include fibers, which have a homogeneous structures, or enable two-component structure, such as sheath/core, side-by-side", "Islands in the sea" and other well-known two-component configuration. For a detailed description of the non-woven sheets see “Nonwoven Fabric Primer and Reference Sampler, E.A. Vaughn, Association of the Nonwoven Fabrics Industry, 3d Edition (1992). Such nonwoven fiber fabric usually have a weight in the range from about 5 grams per square meter (g/m2) to 75 g/m2. For the purposes of the present invention the nonwoven material can be very easy when the majority in the range from approximately 5 to 20 g/m2or any other major mass, which corresponds to prevent sticking in the roll lamination on desirable elastomeric film. However, Toto, in order to achieve the availability of the resulting laminate or product end use certain properties, such as a pleasant texture similar to the texture of the fabric, may be desirable and more severe non-woven fabric with the main weight in the range from approximately 20 to 75 g/m2.

In addition, the scope of the present invention are also other types of substrate layers, such as woven materials, knitted materials, meshes, grids, etc. needless to say that these materials can be used as a protective layer, which prevents the adhesion of the elastomeric film layer in the roll. However, for reasons related to cost, availability and ease of processing, as laminates in the method of the invention are usually preferred nonwoven materials.

The film of the invention can be laminated on the substrate layer by known methods of lamination. These methods include laminating the lamination by extrusion, adhesive lamination, thermal welding, ultrasonic welding, the connection by means of calendering, a point of connection and laser welding and other such methods. In the scope of the present invention also fall and combinations of these methods of connection.

Nokiausa multilayer elastomeric film of the invention that the same can be laminated in two or more such layers of the substrate, as explained above.

Nokiausa multilayer elastomeric film of the invention can be laminated to one or more layers of the substrate at any point of the way. Specifically, the film can be laminated on the substrate layer before or after activation of the film. In the case of most elastomeric layers of the substrate, it is desirable either to lamination to activate and then activate the laminate. Or alternatively nokiausa multilayer elastomeric film can be activated, the substrate layer can be laminated on the activated nokiausa multilayer elastomeric film, and then the laminate activate a second time to ensure ease of stretching of all layers of the laminate. If the activated film should be laminated on elastomer substrate, and activating after lamination is undesirable, then elastomero substrate can be subjected to contraction, shirring, crimps, folding, gathering in folds or other processing, allowing the film component of the laminate to stretch without breaking or damage of the second substrate.

The following examples are presented to illustrate various aspects of the present invention. These examples are in no way intended to limit the invention.

Example 1

p> The elastomeric film was obtained by the method of extrusion through a flat die head. The film included a multilayer structure AVA layers And located on the surface, and the layer was located in the core. Layers And contained crystalline polystyrene (NOVA® 3900 from NOVA Chemicals®). The layer contained In the styrene-butadiene-styrene (SBS) block copolymer (Vector™ 7400 from Dexco™ Polymers LP). Of the layers a and b in a process of co-extrusion got a film where each of the layers And has a thickness of approximately 20 μm, and the layer has a thickness of approximately 80 μm. This film was reeling without additional processing. Fig.5demonstrates obtained by the method of the SEM micrograph of the film of example 1 in a horizontal projection. This micrograph can be seen (brittle polymer film layer And10.

Example 2

The elastomeric film of example 1 was activated in the step of stretching in the directions of both the CD and MD. Used methods step-by-step stretching in the directions of both the CD and MD was represented by what was described in U.S. patent No. 5865926. The activated film can be easily manually stretch in the directions of both the CD and MD. Fig.6Aand6billustrate obtained by the method SEM micrograph subjected to step-by-step stretching of the film of example 2. Dan what's drawings can clearly see the cracking of the surface 12polystyrene surface layer10on the elastomeric film layer20. This case is radically opposed to the smooth surface, visible in Fig.5. Indeed, surface cracks on the film with Fig.6Aand6bhave sharp boundaries, and in the Lumina of cracks12you can see the core layer of elastomer 20.

Comparative example 1

The elastomeric film was obtained by the method of extrusion through a flat die head. The film included a multilayer structure AVA layers And located on the surface, and the layer was located in the core. Layers And contained approximately 80% linear low density polyethylene (LLDPE) (Attane® 4202 from Dow Chemical Company) and 20% of low density polyethylene (LDPE) (Dow® LDPE 640 from Dow Chemical Company). The layer contained approximately 58% of styrene-isoprene-styrene (SIS) block copolymer (VectorTM4111 from Dexco Polymers LP), 19% styrene-butadiene-styrene (SBS) block copolymer (VectorTM8508 from Dexco Polymers LP), 19% LDPE (Affinity® EG 8200 from Dow Chemical Company) and 4% concentrate of white masterbatches (Ampacet® 7188763 from Ampacet Corporation). Of the layers a and b in a process of co-extruding received film, where layers And has a thickness of approximately 4 μm, and the layer has a thickness of approximately 65 microns. This film after receiving a wound without processing.

Part of the film from sravnitelnogo of example 1 was activated in the result of stretching of the film in the direction of the CD. After that, the activated film could easily be stretched manually in the direction of the CD. Figa and 7b illustrate obtained by the method SEM micrograph of as non-activated and activated film of comparative example 1. In this case, inactivated film surface layer 10 has a smooth surface, but the activated film surface layer 10 clearly reveals the appearance of wrinkles and microtexture 14 extendable plastic surface layers. The surface layers, despite the presence of texturing, still remain continuous across the surface of the film. The appearance of this film is quite different from the appearance of the activated film of example 2, for which the cracking of the surface of polystyrene surface layers of the elastomeric film can be clearly seen in Fig.6Aand6b.Draws attention to the fact that in both films, you can see the particles of dye white masterbatches.

Comparative example 2

The elastomeric film was obtained by the method of extrusion through a flat die head. The film included a multilayer structure AVA layers And located on the surface, and the layer was located in the core. Layers And contained approximately 60% of the block copolymer SIS (Vector™ A from Dexco™ Polymers LP) and approximately 4% masterbatches, caking, (AB MB 6017-PS from Polytechs SAS, containing approximately 20% synthetic substances, caking, on the basis of silicon dioxide in the media on the basis of polystyrene resin), which in result led to a final concentration of substances that prevent the sticking of approximately 8% in each layer A. Layer contained approximately 46% of the block copolymer SIS (Vector™ A from Dexco™ Polymers LP), 21% of the block copolymer SBS (Vector™ 7400 from Dexco™ Polymers LP), 30% masterbatches, preventing the sticking, (AB MB 6017-PS from Polytechs SAS, containing approximately 20% synthetic substances, caking, on the basis of silicon dioxide in the media on the basis of polystyrene resin), which in result led to a final concentration of substances that prevent the sticking of approximately 6% in each layer, and 3% concentrate of white masterbatches (Schulman® 8500 from the company Schulman Corporation). Of the layers a and b in a process of co-extrusion got a film where each of the layers And has a thickness of approximately 4 μm, and the layer has a thickness of approximately 65 microns. This film was reeling without further processing.

Part of the film of comparative example 2 was activated in the result of stretching of the film in the direction of the CD. After that, the activated film could easily be stretched manually in n the Board CD. The activated film can be easily manually stretch in the directions of both the CD and MD. Fig.8Aand8billustrate obtained by the method SEM micrograph of as non-activated and activated film of comparative example 2. During the implementation of the method of extrusion occurred the destruction of the16shown on the surface layer of10. However, except for this destruction nonactivated and activated film had a smooth surface in the absence of any signs or cracking of example 2, or microtexturing of comparative example 1. In addition, in both micrographs, you can see a particle of matter-caking.

The specific illustrations and embodiments, described herein, by their nature, are only examples and are not intended to limit the invention defined in the claims. Given this description of the invention, a specialist in the relevant field of technology will be apparent and additional options for implementation and examples that fall in the scope of the claimed invention.

Additional examples showing the elastomeric film with fragile nesipuosia top layer, in which the inner layer is an elastomer based on poly is Levine.

The elastomeric film was obtained by the method of extrusion through a flat die head. The film included a multilayer structure AVA layers And located on the surface, and the layer was located in the core. Layers And contained crystalline polystyrene (CH from Petrochemicals®). The layer contained In the polyolefin elastomer based on polypropylene (VistamaxxTM6102 from ExxonMobil Chemicals). Of the layers a and b in a process of co-extrusion got a film where each of the layers And has a thickness of approximately 7 μm, and the layer has a thickness of approximately 35 μm. This film was reeling without additional processing. After storing the film could easily razmotat without clumping.

This multilayer elastomeric film activated in the step of stretching in the directions of both the CD and MD, as described in U.S. patent No. 5865926. The activated film can be easily manually stretch in the directions of both the CD and MD. Cracking the surface of the polystyrene surface layer on the elastomeric film layer was similar to that presented on page 4 of the drawings of the present application.

1. Nokiausa elastomeric multilayer film including the first brittle polymer film layer, which could not be stretched to more than 110% of its original size without the development of the VA or cracking, and the second elastomeric polymer film layer,
where the first layer contains a brittle polymer selected from polystyrene, and the second layer contains an elastomeric polymer selected from the group comprising a block copolymer of styrene and elastomeric polyolefins,
where the first polymer layer connects with the first surface of the second polymer film layer, and where a multilayer film can be activated with the destruction of the first brittle polymer film layer and making a multilayer film elastomers, which can last at least up to approximately 150% of its original size, and which is then restored to no more than 120% of its original size.

2. Nokiausa elastomeric multilayer film according to claim 1, where the first polymer film layer and the second polymer film layer are combined by a process of co-extruded layers.

3. Nokiausa elastomeric multilayer film according to claim 1, where the first polymer film layer and the second polymer film layer are combined by the method of coating by extrusion.

4. Nokiausa elastomeric multilayer film according to claim 1, further comprising activating a multilayer film with the destruction of the first polymer film layer and making a multilayer film ELAS is ameretti.

5. Nokiausa elastomeric multilayer film according to claim 4, where a multilayer film activate in the stretch.

6. Nokiausa elastomeric multilayer film according to claim 1, further comprising a third polymer film layer containing a brittle polymer, which is connected with the second surface of the second polymeric film layer.

7. Nokiausa elastomeric multilayer film of claim 1, where the second surface of the second polymeric film layer is combined with the upper substrate layer.

8. Nokiausa elastomeric multilayer film according to claim 7, where the top layer of the substrate comprises a polymeric film layer, non-woven material, paper product, a woven material, a knitted material, a grid, a lattice, or a combination of both.

9. Nokiausa elastomeric multilayer film of claim 1, where the second surface of the second polymer film is combined with one of the multiple layers of the substrate, where several substrate layers include one or more substrates selected from the group consisting of polymeric film layer of non-woven material, paper product, woven material, knitted material, mesh, lattice, or combinations thereof.

10. Nokiausa multilayer elastomeric film according to claim 1, further including making holes in noslepumaina multilayer film.

11. Way to obtain is Eclipsys multilayer elastomeric film, including
a) ensuring the availability of nokiausers multilayer film layer comprising the first polymer film layer containing fragile polymer selected from polystyrene, where the fragile polymer could not be stretched to more than 110% of its original size without breaking or cracking, coupled with the first surface of the second polymer film layer containing an elastomeric polymer selected from the group comprising a block copolymer of styrene and elastomeric polyolefins; and
b) activating noslepumaina multilayer films with the failure of brittle polymer film layer and making noslepumaina multilayer film elastomers, which can last at least up to approximately 150% of its original size, and which is then restored to no more than 120% of its original size.

12. The method according to claim 11, where the first polymer film and the second polymer film are combined by a process of co-extrusion.

13. The method according to claim 11, where the first polymer film and the second polymer film are combined by the method of coating by extrusion.

14. The method according to claim 11, where a multilayer film activate in the stretch.

15. The method according to claim 11, further including a connection with the multilayer film is on the second surface of the second polymer film of the third polymer film, containing brittle polymer.

16. The method according to claim 11, further including a connection multilayer film with a top layer of the substrate.

17. The method according to clause 16, where the top layer of the substrate includes a polymer film, non-woven material, paper product, a woven material, a knitted material, a grid, a lattice, or a combination of both.

18. The method according to claim 11, further including a connection multilayer film with one of the multiple layers of the substrate, where several substrate layers include one or more substrates selected from the group consisting of polymeric film layer of non-woven material, paper product, woven material, knitted material, mesh, lattice, or combinations thereof.

19. The method according to claim 11, further including making holes in noslepumaina multilayer elastomeric film.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of obtaining elastomeric materials and particularly to processing surfaces of elastomer films in order to prevent creating in a roll. The method involves forming a film layer from an elastomeric polymer from a block-copolymer of vinyl arylene and conjugated diene monomers, which can be stretched by at least 150% of the initial size and then shrink to not more than 120% of the initial size. An anti-crease coating layer is applied on the first surface of the film. The coating consists of a solvent and an anti-crease coating component selected from lacquer and a surfactant. The film is rolled into a roll, the anti-crease coating component being in contact with the second surface of the film.

EFFECT: efficient method of processing surfaces of elastomer films to prevent creasing in a roll.

18 cl, 5 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a perforated film, a method of producing a perforated film for packaging, storage container made from said film and method of filling the storage container with powdered material. The perforated film has at least one layer made from a composition which contains at least one thermoplastic polymer, where at least one layer has perforations whose dimensions are less than or equal to 90 micrometres (mcm), and the ratio of the total perforated area to the total area of the surface of the film is between 400000 and 2000000 square micrometres per square inch of the film ((mcm)2/(inch)2) (62000 - 310000 ((mcm)2/(cm)2).

EFFECT: obtaining storage container made from said perforated film, having a combination of perforation dimensions and density of perforations, which enables efficient removal of air when filling the container with fine powder substances under pressure.

51 cl, 3 tbl, 5 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to a method of forming a multilayer elastomeric laminate for clothes and a hygienic product, to a multilayer elastomeric laminate and an article made therefrom. The method involves the following: a) laminating an elastomeric film onto a first substrate to form a laminate web having an elastomeric film surface, where the elastomeric film contains an elastomeric polymer selected from a group consisting of block copolymers of vinyl arylene and conjugated diene monomers, natural rubber, polyurethane rubber, polyester rubber, elastomeric polyolefins, elastomeric polyamides and mixtures thereof, and the first substrate is made from a polymer film, non-woven fabric, a paper article, woven fabric, knitted fabric, scrim, netting or a combination thereof; b) slitting the laminate web to form laminate strips; and c) bonding the surface of the elastomeric film of at least one laminate strip with a second substrate having a width greater than the width of the laminate strip to form a multilayer elastomeric laminate, where the second substrate is made from a polymer film, non-woven fabric, a paper article, woven fabric, knitted fabric, scrim, netting or a combination thereof.

EFFECT: efficient manufacturing of an elastomeric film having good elastomeric properties and good-looking surface structure after activation, which can be rolled and stored without monitoring.

20 cl, 6 dwg

FIELD: medicine.

SUBSTANCE: there is disclosed three-dimensional apertured film containing the first plane surface in the first default plane, the second plane surface in the second default plane and a set of apertures passing between the first and second surfaces. The three-dimensional apertured film also comprises at least one element that overlaps each set of apertures to form thereby a set of smaller apertures. The element overlapping each aperture has an upper face arranged below the first default plane.

EFFECT: three-dimensional apertured film has improved properties in processing the fluid when used in disposable absorbing products.

57 cl, 11 dwg, 1 tbl

Layered panel // 2323092

FIELD: aircraft industry.

SUBSTANCE: layered panel comprises at least two interconnected stacks of metallic layers and plastic layers reinforced with fibers. The stacks have intermediate section `at which at least one of the internal layers is discontinuous. All other layers including outer metallic layers are continuous. Within the material, one stack of layered composition is smoothly goes into the other without onset of stress concentration.

EFFECT: enhanced strength.

14 cl, 7 dwg

FIELD: chemical industry; other industries; methods and the heads for production of the laminate with the lengthwise-transversal orientation of the layers made out of the oriented films.

SUBSTANCE: the invention presents the laminate with the lengthwise-transversal orientation of the layers formed out of the films, from which at least two of them have mono-axial or unbalanced two-axial orientation, in which the main direction of the orientation in one of these films intersects the main direction of the orientation in other film and have the modifications of the surface properties executed in the certain tracery of these two films on those their surfaces, which are disposed inside the laminate and are connected with each other. The surface layers of the films located inside contain the set of filaments made out of the material produced by the joint extrusion, and are located so, that these two sets on two films intersect each other. The filaments may by used for control over the adhesion between the films and for reduction of the trend to delamination at the multiple bending. It allows to use the laminate in the capacity of the canvas cloth. In the combination with creation of the relief at least on one film, the main layer of which is made transparent for formation of the strips. At that the colored filaments attach the attractive visual effects to the laminate. The visual effect makes the laminate to look more heavy-gage.

EFFECT: the invention ensures, that the filaments used in the laminate may by used for control over the adhesion between the films, for reduction of the trend to delamination at the multiple bending allowing to use the laminate as the canvas cloth and the colored filaments attach the attractive visual effects to the laminate.

58 cl, 7 dwg, 3 ex

FIELD: laminated fire-proof materials.

SUBSTANCE: method involves applying fire-retarding material on tissue web to create the first discrete layer, wherein the fire-retarding material is based on emulsified polyvinylchloride; placing the second tissue web on the first one; covering the second tissue web with the same fire-retarding material to form the second discrete layer; arranging the third tissue web on the second one and simultaneously hardening the first and the second discrete layers.

EFFECT: increased thermal protection, fire-resistance, improved protection against poisonous agents and increased labor productivity.

1 tbl

FIELD: fire-resistant materials.

SUBSTANCE: invention relates to fabricating fire-resistant material suitable to make filter-type individual respiratory defense systems. Material contains textile sheet with, applied thereon, emulsion polyvinylchloride-based fire-retardant composition in the form of discrete layer. Material additionally has, on its reverse side, (i) a sorption layer constituted mainly by carbon-containing material with, applied on its both sides or on the side being in front of facing layer, discrete coating based on polyvinylchloride containing fire retardants, and (ii) reverse layer containing woven or unwoven material made from cotton, viscose, synthetic fibers or mixtures thereof.

EFFECT: acquired high fire-resistant and heat-resistant properties with high air permeability and thereby defense against poisons preserved.

2 cl, 2 dwg, 1 tbl, 2 ex

FIELD: fire-resistant materials.

SUBSTANCE: invention relates to fabricating fire-resistant material suitable to make filter-type individual respiratory defense systems. Material contains base in the form of cloth with, applied on one of its sides, discrete fire-retardant emulsion polyvinylchloride-based coating. Material additionally contains similar coating applied on its other side and, situated on its opposite sides, facing cotton/ester textile layer and reverse cotton textile layer. Base cloth consists of carbon-containing material.

EFFECT: enhanced fire-resistant and heat-resistant properties with high air permeability and thereby defense against poisons preserved.

1 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of obtaining elastomeric materials and particularly to processing surfaces of elastomer films in order to prevent creating in a roll. The method involves forming a film layer from an elastomeric polymer from a block-copolymer of vinyl arylene and conjugated diene monomers, which can be stretched by at least 150% of the initial size and then shrink to not more than 120% of the initial size. An anti-crease coating layer is applied on the first surface of the film. The coating consists of a solvent and an anti-crease coating component selected from lacquer and a surfactant. The film is rolled into a roll, the anti-crease coating component being in contact with the second surface of the film.

EFFECT: efficient method of processing surfaces of elastomer films to prevent creasing in a roll.

18 cl, 5 dwg, 2 ex

FIELD: textile, paper.

SUBSTANCE: covering includes a textile element of surface 2 and a layer 1, which on the surface and at least partially is connected to this textile element of the surface. The layer 1 contains a viscoelastic polymer foam. The textile element of the surface 2 has a module of elasticity, the value of which makes from ≥0.5 N/mm2 to ≤2.5 N/mm2. In the layer 1 the viscoelastic polymer foam has deposition hardness, the value of which at 40% of compression makes from ≥1 kPa to ≤10 kPa. In the layer 1 the viscoelastic polymer foam has hysteresis, the value of which at the deposition hardness determination of 40% makes ≥20% to ≤70%.

EFFECT: method of manufacturing includes a foaming operation of the back side of the textile element of surface with the help of a reaction mixture, forming a polymer foam of the layer.

13 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to flexible elastomer polyurethane skin for decoration of car interior and method of its production. Proposed skin comprises first and second flexible layers produced by spraying first and second reaction mixes on each other to produce polyurethane. Spraying of second reaction mix is started in no later than 90 s after termination of spraying first reaction mix. First reaction mix is intended for producing aliphatic polyurethane and consists of isocyanate component, components reactive with respect to isocyanate, and catalytic component with lead content less than 2 molar fractions. Second reaction mix is intended for producing aromatic polyurethane. Mean weight of unit surface of proposed skin makes, at least, 0.6 kg/m2 and mean flexure modulus makes less than 30 MPa.

EFFECT: higher flexibility, no lead, stability of colour.

24 cl, 6 tbl, 6 ex, 4 dwg

FIELD: chemistry.

SUBSTANCE: polyurethane material contains a first part of crystalline particles, having self-orientation and bonded so as to keep their orientation along a first crystallographic line at least in two directions, a second part of crystalline particles having self-orientation and bonded so as to keep their orientation along a second crystallographic line at least in two directions, wherein the first crystallographic line is different from the second crystallographic line and where the said crystalline particles constitute more than approximately 30% of the total volume of the polyurethane material, and where the polyurethane contains a product of reaction of components comprising: (a) approximately 1 equivalent of 4,4'-methylene-bis(cyclohexylisocyanate); (b) approximately 0.3 of a trimethylolpropane equivalent; and (c) approximately 0.7 of a butanediol or pentanediol equivalent, and where the polyurethane material undergoes thermal treatment at temperature ranging from approximately 35°C to approximately 150°C or holding.

EFFECT: production of polyurethane material, products of which are made through casting or reaction injection moulding and have good optical properties, high resistance to impact loads, high impact resistance, high K-ratio, good ballistic stability, good resistance to solvents and good weather resistance.

26 cl, 110 ex, 33 tbl, 26 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer material used in production of laminated moulded articles. Multilayer material comprises laminar material produced by gluing layer (I) and layer (II) together. Layer (I) consists of fluorine-containing resin with functional groups that represent acid residue. Layer (II) consists of thermoplastic resin with functional groups representing amino group, hydroxyl group or epoxy group. Functional groups of thermoplastic resin can form chemical bonding with functional groups of fluorine-containing resin. Fluorine-containing resin features low fusion point of 120-230°C. It is selected from the group consisting of copolymer of ethylene/tetra fluorine ethylene, copolymer of ethylene/tetra fluorine ethylene/hexa fluorine propylene and copolymer of ethylene/tetra fluorine ethylene/hexa fluorine propylene/CH2=CH-Rf, where Rf is C2-6perfluoroalkyl group. Thermoplastic resin (B) is selected from the group consisting of thermoplastic resins based on polyurethane, complex polyether, polyolefin, polyvinyl acetate, polyvinyl chloride and polystyrene. Multilayer material is produced by gluing at heating, multilayer extruding, multilayer moulding or moulding with multilayer lamination.

EFFECT: high-adhesion laminar material, high process efficiency.

7 cl, 1 tbl, 20 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethanes and articles made from said polyurethanes, as well as to laminated material and coating composition containing such polyurethanes. The polyurethane is a product of a reaction between components which contains less than approximately 10 wt % polyesterpolyol and/or polyetherpolyol, where the components are selected from: (a) approximately 1 equivalent of at least one polyisocyanate; (b) approximately 0.05-0.9 equivalent of at least one branched polyol which contains 3-18 carbon atoms and at least 3 hydroxyl groups; and (c) approximately 0.1-0.95 equivalent of at least one diol which contains 2-18 carbon atoms, where during mixing, the reaction components are held at reaction temperature of at least approximately 100°C for at least approximately 10 minutes.

EFFECT: production of polyurethanes, articles of which are made through casting or reaction injection moulding and have good optical properties, high resistance to impact loads, high impact resistance, high K-ratio, good ballistic stability, good resistance to solvents and good weather resistance.

37 cl, 113 ex, 82 tbl, 26 dwg

FIELD: process engineering.

SUBSTANCE: proposed invention relates to multilayer and laminar materials and a polymer layer integrated therewith, and aims at producing polymer-textile material to be used in clothing manufacture. Outerwear material comprises three layers, i.e. top and bottom layers of textile linens and glue interlayer wherein top layer represents bi-component material comprising upper side with seamy side applied thereon and furnished with porous polyesterurethane with weight ratio between upper side and porous polyesterurethane making 41-73:27-59, respectively, with thickness of 250-600 mcm and warp rigidity making 520-800 mcN·cm2. Glue interlayer is made from thermosetting material with melt point of 102-129°C. Bottom layer represents kapron knitted linen with surface density of 50-70 g/m2. Total features of polymer-textile multilayer material: thickness of 460-820 mcm, warp rigidity of 3500-9000 mcN·cm2. Note here that described material is supplied in reeled form. Invention covers also the article made from said multilayer material.

EFFECT: reduced labour input, wider range of articles, improved labour conditions.

4 cl, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly to production of lamina material for automobile inner panels finish. Panel laminar material comprises flexible envelopment 1, rigid substrate 2 and interlayer 3. Flexible envelopment 1 comprises main part 8 that makes front side of laminar material and at least one flange 9 that runs from main part 8 toward substrate 2 to form at least one section of lateral side of laminar material. To prevent leaks of foam in forming interlayer 3, flange 9 is elongated by edge part 19 with flexible sponge 11 to be arranged between envelopment 1 and substrate 2. Said flexible sponge is pressed against substrate 2 so that the former makes a seal between envelopment and substrate. To prevent deformation of envelopment, edge part 10 comprises additionally at least one continuous or discontinuous ledge 12 running along flange 9 to prevent slippage of said part on closing the mould.

EFFECT: efficient seal of rigid substrate in forming interlayer between envelopment and substrate.

25 cl, 8 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to selectively removable intermediate coating compositions, containing at least one polyamide with a terminal amino group, in which average molecular weight of the polyamide with the terminal amino group ranges from 500 Da to 100000 Da. The invention also relates to a multilayer coat containing a first coat (basic coat); a second coat (outer coat); an intermediate coat between the first and second coats, in which the intermediate coat contains at least one polyamide with a terminal amino group, which is used to coat surfaces of aircraft and spacecraft.

EFFECT: obtaining a coating composition for facilitating selective removal of the outer and intermediate coats by washing off without removing the basic coat.

46 cl, 4 ex, 1 tbl

FIELD: fire safety.

SUBSTANCE: method of combined plate manufacturing is that the fire layer A, which is a fiber-reinforced hydrous sodium silicate, causing a mixture of epoxy resin and hardener or polyurethane resin to form a protective layer B. Before curing the protective layer B in the substrate it is applied a layer C from wood stoves or wood particle board of medium or high density. Before or after coating of protective layer B and the substrate layer C, fire-prevention layer A is covered with protective layer B. Then combination plate is cured by pressing. The resulting combination plate contains a sequence of layers B'-A-B-C, and consists of fire-prevention layer A from an aqueous fiber reinforced sodium silicate with a substrate layer C of wood or particle board of medium-high density, protective layers of B and B', inflicted with both sides to fire-prevention layer A consisting of epoxy or polyurethane resin. Protective layers B and B' are used as an adhesive layer between the fire-prevention layer A and a substrate layer C. In addition, a combination plate can contain a substrate layer C. The combination plate contains a sequence of layers of C-B'-A-B-C.

EFFECT: reduction in price of combined plate manufacturing with out money-losing bonding by special adhesives.

5 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of obtaining elastomeric materials and particularly to processing surfaces of elastomer films in order to prevent creating in a roll. The method involves forming a film layer from an elastomeric polymer from a block-copolymer of vinyl arylene and conjugated diene monomers, which can be stretched by at least 150% of the initial size and then shrink to not more than 120% of the initial size. An anti-crease coating layer is applied on the first surface of the film. The coating consists of a solvent and an anti-crease coating component selected from lacquer and a surfactant. The film is rolled into a roll, the anti-crease coating component being in contact with the second surface of the film.

EFFECT: efficient method of processing surfaces of elastomer films to prevent creasing in a roll.

18 cl, 5 dwg, 2 ex

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