Method of producing gas-permeable multilayer imitation leather

FIELD: process engineering.

SUBSTANCE: invention relates to method of producing gas-permeable imitation multilayer leather, and imitation leather produced thereof. Said leather is made up of the layer of flat textile warp with, at least one foamed polyurethane-based intermediate layer applied there on that feature, at least, partially exposed porous structure, and face polyurethane-based layer applied on, at least, one intermediate layer. First stage of proposed method comprises applying face layer on peel-apart web. Then, at least one intermediate layer is applied onto face layer. Now, web layer is applied on, at least, one intermediate layer and web is separated from face layer. Note here that, to produce face layer, aqueous aliphatic polyurethane dispersion in liquid phase is applied onto web, and, immediately after applying said dispersion, water contained therein is evaporated by supplying heat thereto for 5 min, max., to facilitate drying of polyurethane dispersion on web without film formation and forming of face layer with micro pores.

EFFECT: small-sized pores, goo gas permeability.

39 cl, 4 dwg

 

Description

The present invention relates to a method of manufacturing a multilayer gas-permeable artificial leather, consisting of a layer basics of textile flat material forms at least one deposited intermediate layer based on polyurethane with at least a partially open porous structure, as well as the front layer based on polyurethane applied over the entire surface on at least one intermediate layer, and the first process stage, the face layer is applied over the entire surface on the peelable substrate and strengthen, then on the face layer is applied at least one intermediate layer, which is then place a layer of the substrate, and in conclusion, the substrate prepare the chin from the top layer.

Such methods of manufacturing artificial leather is known, for example, from the patent of the GDR DD 259106 A3 and differ in that the layer structure to form a so-called inverse method, that is, first on the contact surface of the substrate to form the upper side of the front layer, which is a visible side of the finished artificial leather, and then put the other layers up to layer framework, which forms the wrong side of the finished artificial leather. After creating the layer structure of the substrate prepare the chin from the front layer, resulting becomes available ViDi the first party, and manufactured artificial leather turn, after which the surface of the front layer may be subjected to embossing or other additional processing.

Gas-permeable multilayer faux leather suitable for use primarily in the automotive industry, for example, as upholstery of chairs, because gazopronitsayemykh like upholstery contributes to the comfort of the car seat and prevents sweating.

In the layers basics of textile material, and an intermediate layer of polyurethane foam used in this layer structures, there is a known amount necessary to ensure gas permeability open pores, while the formation of porous over the entire surface of the front layer of polyurethane to the last time is problematic, because the polyurethane dispersion applied to the substrate in accordance with the backward technology, when the hardening is usually prone to the formation does not contain pores of a solid films, hence the need to perform additional process steps, such as formation missing in the front layer of the pores methods igloprobivnye or hood. However, these process operations are not only donostiako, but also adversely affect the appearance of icewagon layer, as created, for example, needle-punched pores clearly visible to the naked eye.

From European patent EP 1279762 known about the formation of a gas-permeable artificial leather is specified in the beginning of the description of the type, but the formation of the front layer is accompanied by formation of a film, in connection with which the front layer is similar to the faux leather has no need for gas permeability porosity. Although proposed in the cited patent artificial leather and contains a porous and, consequently, gas-permeable front layer, but it is not distributed over the entire surface of the substrate that mimics the structure of the surface of natural leather, but only in its recesses, and therefore formed between such recesses zones of the face layer are formed holes. Such artificial leather has many disadvantages, for example, the low impedance of the front layer to abrasion.

In accordance with the international application WO 2005/047549 on a structured substrate, heated to a temperature below 105°C, put the finishing from the aqueous polymer dispersion, and the subsequent evaporation of water is accompanied by formation of a film. Although manufactured in this way the layer and has a certain porosity, however, in connection with the formation of the film is its permeability, first of all the number is in and the size of the pores, need improvement.

Based on the foregoing, the present invention was based on the task to provide a method of manufacturing a multilayer gas-permeable artificial leather is specified in the beginning of the description of the type, in accordance with which it was possible without the need for additional process steps to manufacture a multilayer artificial leather, equipped with applied over the entire surface of the gas-permeable, and hence, have an open pore structure of the front layer, and the method should be particularly economical and pore size made them artificial leather should be so small that the pores do not spoil its appearance.

The specified task according to the invention is solved by a method of manufacturing a multilayer gas-permeable artificial leather with the distinctive signs provided in paragraph 1 of the claims.

Preferred options proposed in the invention method are given in the respective dependent claims.

Proposed in the invention method is based on the fact that to form the front layer of the aqueous aliphatic polyurethane dispersion used to achieve this goal as a basic source material is applied in liquid form over the entire surface of the substrate, and right near St is only after this are contained in the polyurethane dispersion of the water is evaporated by heat, carried out in a time interval of no more than 5 seconds, which promotes drying polyurethane dispersion on the substrate without the formation of film formation containing micropores of the top layer.

Under implemented on the entire surface by the application of a polyurethane dispersion, respectively forming the front layer, in accordance with the present invention involve a continuous coating of polyurethane dispersion on a substrate without gaps or remaining uncovered areas, respectively, the overlap of the outer layer entire surface of the intermediate layer (intermediate layer).

The micropores formed in the front layer in accordance with the present invention, have such dimensions that the front layer was vapor-permeable, however, prevented the admission of liquid water or at least slowed down this process. Proposed in the invention method is easy to create a pore size of from 10 to 80 μm, however, the generated pores may also have a large diameter respectively.

According to the invention the aqueous aliphatic polyurethane dispersion used to form the microporous top layer, put on capable of peeling the substrate by the known methods, with application of heat carried out with such intensity to provide instant isyana polyurethane dispersion, prevent the formation of a film, respectively, will cause immediate destruction of the film in the case of education.

While in accordance with the prior art in the formation of the surface layer always strive to implement the process of film formation, and subsequently formed film or in the process of education give porosity, according to the present invention selects a different principle, providing for the complete elimination of film formation with instant drying the applied dispersion. The aqueous polyurethane dispersion is applied onto the substrate by appropriate means in the form of individual droplets, which at high temperature substrate dry out independently of each other, which causes the lack of crust.

In accordance with the present invention under instant drying imply drying deposited on a substrate aqueous aliphatic polyurethane dispersion, conducted over a period of time not exceeding 5 seconds, provided by heating the dispersion to a temperature preferably in the approximate range from 175 to 200°C. heating the dispersion to a specified temperature can be carried out by heating the substrate to a temperature component of at least 175°C. At such temperatures the particles used is polyurethane dispersion may not be caused by any mechanical damage, however, the evaporation of water in it happens so quickly that to provide the necessary exceptions of the process of film formation drying. Depending on the aqueous aliphatic polyurethane dispersion for forming the front layer, obviously, can be selected as well as other higher or lower temperature provided sufficient thermal stability to be used polyurethane dispersion.

When applying the aqueous aliphatic polyurethane dispersion in liquid form individual droplets dispersion caused by evaporation of water due to intensive heat supply to the edges of each of them, are almost directly on the substrate, due to which almost completely eliminates the possibility of spreading and consolidation of separate drops. As a result, between individual drops are formed micropores necessary to ensure gas permeability is made in a similar manner the front layer. In this regard, proposed in the invention method eliminates the need for subsequent technological operations mechanical creation then, for example, by the method of igloprobivnye or hood. In addition, the generated micropores are so small that they are difficult or even impossible to see with the naked eye, in connection with chemistonline proposed in the invention method of multilayer gas-permeable artificial leather has a particularly attractive appearance.

For formation of the surface layer is preferably used aqueous polyurethane dispersion with a solids content being in the range from 30%to 60%.

In accordance with the proposed invention is a method of applying the aqueous aliphatic polyurethane dispersion in liquid form on a substrate can be performed in several different methods.

According to the invention to form the front layer of the aqueous polyurethane dispersion is recommended to be sprayed on the entire surface of the substrate in the form of fine droplets through the nozzles, and this application can be as smooth or embossed on the surface of the substrate.

For spraying waterborne polyurethane dispersions can be used commonly used methods, such as airless or air spray, industrial low-pressure spray, and spray with hydraulic pressure.

Other possible ways of applying polyurethane dispersion to form the front layer according to the invention provide for the printing on the entire surface of the substrate, which is suitable, for example, a method of raster or screen printing. Used for forming the front layer of the aqueous polyurethane dispersion can be applied to the substrate by methods of printing in the form of crevice is but small drops, that, in turn, allows to realize the above instant drying due to the intense heat.

In addition, for applying a thin layer of aqueous polyurethane dispersions can be used, for example, gravure printing method, thereby forming the desired pores through which is implemented according to the instant invention the drying of the applied layer.

Used for forming the front layer of the substrate may preferably have the form of an infinite canvas, if necessary, continuously passed through the rolls, at least one of which is heated roller is used for heating the substrate up to the temperature of evaporation of the water contained in the deposited on the substrate polyurethane dispersion. In accordance with this need for instant water evaporation heat is supplied to the applied aqueous polyurethane dispersion from the already heated to the proper temperature of the substrate.

In accordance with another alternative, or in addition to those already discussed options applied on the substrate polyurethane dispersion with the aim of evaporation of the contained water can be heated by thermal radiation and/or microwave, which promotes drying of the dispersion on the substrate without formation of the film and provides for the formation of microporous Lizunov the layer.

However, heat must be supplied to the aqueous polyurethane dispersion exclusively from the substrate, so remote from her side forming the front layer could not proceed the process of film formation, otherwise there would have been a slowdown, or even a complete cessation of further evaporation of the polyurethane dispersions of water.

In addition, the use of the substrate in the form of an endless fabric allows the manufacturing process proposed in the invention of artificial skin at least semi-continuous, preferably in a continuous mode.

Depending on the method for applying polyurethane dispersion method, the thickness deposited on a substrate of the front layer can be from 5 to 150 microns.

The mass of the deposited surface layer in the dry state is from 10 to 50 g/m2, preferably from 30 to 40 g/m2.

The ideal is the dry weight of the surface layer, which corresponds to the interval between 30 and 40 g/m2that above is achieved by applying polyurethane dispersion on a substrate by spraying. However, the proposed invention the method also allows to shape containing a sufficient number of micropores front layer and a higher dry weight of the surface layer, up to 50 g/m2.

The substrate can be used, e.g. the, easy peeling formed from the front layer of polymer film, siliconized textile material flat shape or siliconized paper, and a metal substrate such as steel blade.

As described above, the substrate depending on the purpose of the artificial skin may have a smooth or profiled surface and, accordingly, to ensure the formation of a smooth or profiled face layer, for example layer that mimic the texture of natural leather.

For even higher speed of evaporation of the water contained in the aliphatic polyurethane dispersion, the latter can optionally contain miscible with water, low-boiling organic solvents, which allows to increase the intensity occurring due to supply heat of vaporization of water.

Upon completion of the above formation of the surface layer, which is implemented with instant drying deposited on the entire surface of the substrate polyurethane dispersion without the formation of film on top of the front layer, and in the case of applying multiple intermediate layers respectively applied over before this intermediate layer is applied at least one intermediate layer in the form of polyurethane foam with an open pore structure, and the application is preferably carried tlaut doctor blade method. To this end the base polyurethane dispersion is mixed with used for the formation of a foam with an open pore structure of the foam stabilizers, if necessary, added fire retardant tools, as well as other additives, and through the air to create a foam of the desired specific gravity. The mass of a unit volume of foam affects the permeability and mechanical stability of the corresponding foam.

Thanks to the use of at least one intermediate layer of foam properties proposed in the invention of the gas-permeable artificial leather only minimally dependent on the substrate material, since such an intermediate layer ensures an optimal connection between the substrate and outer layer.

When using only one intermediate layer of foam mass is preferably from 200 to 700 g/l, preferably from 300 to 600 g/l, more preferably from 400 to 500 g/l, while its thickness when applied to the face layer doctor blade method is in the range from 200 to 1000 microns.

In the case of a sequential application on the front layer, two intermediate layers of foam, the first layer applied directly on the face layer is preferably a doctor blade method, has a higher weight than the damage is on the second intermediate layer, also known as a duplicate layer.

In this case, both the intermediate layer is preferably, but not necessarily have the same thickness, which is suitable variant ranges from 200 to 800 microns.

The mass of the applied printing method on the face layer of the first intermediate layer of foam is preferably from 300 to 700 g/l, preferably from 400 to 600 g/l, while the mass of the second intermediate layer of foam (duplicate layer) is in the range from 200 to 600 g/l, preferably from 300 to 500 g/L.

To ensure sufficient transparency since their average size for each of the intermediate layers preferably should be between 100 to 200 microns.

An intermediate layer of foam should possess sufficient strength in terms of the operation of embossing, which primarily applies to the use of smooth substrates, as well as to the occasion of a subsequent stamping fabricated multilayer faux leather. Therefore, drying of the intermediate layer should be implemented in such a way that its surface was absent due to internal stress cracks, and therefore the drying is usually performed by known methods in divided into several zones channel with independent temperature control in each of them.

The camera is lnost used intermediate layers can be further enhanced thanks to their stitching, carried out by adding appropriate additives, such as isocyanate or melamine, or by adding functional fillers, such as mineral or fibrous fillers and polymer powders, such as powdered polyethylene.

The material used in accordance with the proposed invention by way basics assistants can vary within wide limits, with suitable core materials are, for example, fibrous prepreg fabric, knitted fabric, non-woven material, or combinations thereof, as well as non-woven materials made of microfibers, lining knitted or non-woven material or a combination of woven and knitted materials. To increase the strength of the connection with the intermediate layer used in the textile flat material forms can also be impregnated, for example, polyurethane.

In all cases it is preferable to overlay a layer of Foundation on top of the intermediate layer that is implemented after forming the at least one intermediate layer at a time, which corresponds to incomplete drying of this layer, and therefore the layer basics at least partially immersed in the intermediate layer and is fixed therein in accordance with the principle of fill. However, the layer framework should not be too deeply immersed in about eroticly layer, while the degree of immersion layer framework can be adjusted by varying the viscosity used for forming the intermediate layer of foam, pressure duplication and drying conditions.

On the surface formed by the front layer of gas-permeable multi-layer artificial skin after peeling the substrate can also be applied lacquer that allows you to optimize the mechanical properties of the material, such as its resistance to scratching, as well as to improve its organoleptic characteristics. The application of the lacquer coating can be performed, for example, a roller with rastrirovano surface.

As described above, after peeling the substrate surface is made gas-permeable multi-layer artificial skin, if necessary, can be subjected to embossing, for example, mimic the texture of natural leather and is particularly favorable is the use of a vacuum embossing, because of low pressure and a longer contact exposed embossed surface with tinyline the platen better preserves the structure of the foam, and thanks to the vacuum open additional pores and formed capillaries, which leads to an additional increase of gas permeability is made of artificial leather. In addition, through the use of tinylogo roller with the special profile characterized by the presence of sharp edges, it is possible to provide an additional opening of the pores and capillaries. The advantage of embossing already formed artificial leather also lies in the fact that the stamping is impossible to affect any subsequent processing operation like this can happen, for example, in the case of an embossed substrate and deposition of subsequent layers.

The object of the present invention is also gas-permeable multi-layer synthetic leather with a layer basics of textile material flat shapes drawn on a layer basis, at least one intermediate layer based on polyurethane with at least a partially open porous structure, as well as the front layer based on polyurethane applied over the entire surface on at least one intermediate layer.

To solve this in the beginning of the task definition is particularly economical manufacture of artificial leather, at the same time with an excellent permeability and pleasant appearance, proposed in the invention of the gas-permeable multi-layer synthetic leather provided with a front layer with micropores formed by specific drying aqueous aliphatic polyurethane dispersion without the formation of a film.

The thickness of the surface layer is similar to the gas-permeable many what sloinoi artificial leather is preferably from 5 to 150 μm, while the mass of the deposited surface layer in the dry state is in the range from 10 to 50 g/m2, preferably from 30 to 40 g/m2.

Other distinguishing features of the multilayer gas-permeable artificial leather are given in the respective dependent claims.

Proposed in the invention method and manufactured in accordance with multilayer gas-permeable artificial leather further examined in more detail by the example of certain embodiments of the invention with reference to the accompanying description of the drawings on which is shown:

figure 1 is an enlarged schematic cross-sectional proposed in the invention of the gas-permeable multi-layer artificial skin in the first version,

figure 2 is a cross section proposed in the invention of the gas-permeable multi-layer artificial skin in another embodiment,

figure 3 - diagram of the manufacturing process proposed in the invention of the gas-permeable multi-layer artificial skin,

4 is obtained using a scanning electron microscope picture of the surface layer proposed in the invention of artificial leather.

Figure 1 shows a cross section of a multilayer gas-permeable artificial leather, which consists of the following layers (from top is th, accordingly, the visible side): front layer 1 on the basis of polyurethane, which is located below the intermediate layer 2 made of polyurethane foam with an open pore structure and filled in the intermediate layer 2 layer 3 of the textile flat material forms.

While the textile flat material forms 3 and the intermediate layer 2 made of polyurethane foam with an open pore structure formed in the form of porous and, consequently, the gas-permeable layer in a natural way, the front layer is made thanks described below instant drying aqueous aliphatic polyurethane dispersion on the substrate without formation of the film, i.e. the so-called inverse method, thanks to which the front layer is also attached to the porosity and the diameter of the respective micropores is from 10 to 70 μm, and, thus, the resulting total combined material has a gas permeability. The upper side of the front layer 1 further optionally, you can provide a lacquer layer 4 and/or the surface of the composite material can be subjected to profiling, such as embossing, imitating the texture of leather.

The process of production of such multilayer gas-permeable artificial leather schematically shown in figure 3.

The manufacture of artificial leather carry out so-called reverse is m method, that is, first on the substrate 6, further peelable from the front layer 1, to form, respectively, is applied, the front layer 1, then the intermediate layer 2 and layer 3.

The direction of movement created in this way material is shown in figure 3 by the arrow R.

First installation with a working roll 60 serves to be used as the substrate the substrate 6, which may be, for example, siliconized paper with a smooth or embossed, for example, under the natural skin surface.

The substrate 6 is passed through heated rollers 61, 62, 63, and therefore its surface temperature at the time of admission to the feed roll 64 is preferably in the range of from 175 to 200°C.

With the aim of forming the surface layer in the first application unit I over the entire surface of the heated substrate 6 through spray nozzles located in the liquid aqueous aliphatic polyurethane dispersion in the form of small droplets, and thanks to the pre-made heat the substrate 6 is instantaneous evaporation contained in the polyurethane dispersion of water and/or optionally used in the composition of the solvent, and applied polyurethane dispersion dries in the absence of film formation during the period of time which is less than 5 seconds.

In addition to the supply of heat through the heated substrate 6, additional heat energy can be brought in the first drying chamber T1, for example, due to the effect of thermal radiation W, which, however, expose the back side of the substrate 6 so as not to interfere with the evaporation contained in the polyurethane dispersion of the water and may present in a dispersion solvent.

With instant drying, implemented within the shortest period of time, the spreading of the individual droplets of aqueous polyurethane dispersions and their integration on the surface of the substrate is difficult, which reliably prevents the formation of the film of the applied spray polyurethane dispersion, and therefore, formed in the drying chamber T1 of the front layer 1 contains micropores, which are, for example, from 10 to 70 μm or more.

The thickness of the formed this way, the front layer is preferably from 20 to 100 μm, and its weight in the dry state from 30 to 40 g/m2.

Then formed on the substrate 6 microporous front layer 1 processing unit III through squeegee applied previously prepared by a known method, a layer of polyurethane foam, which weight is from 200 to 700 g/l, preferably from 300 to 600 g/l, more preferably from 400 to 500 g/l, when the thickness of ot to 1000 microns.

With the aim of forming the intermediate layer 2 to the incompletely dried up polyurethane foam from the roll 30 through the guide roller 31 serves layer 3 in the form of an appropriate textile material flat shape and place it on the foam, and layer 3 is at least partially immersed in not fully dried intermediate layer 2 and connected to it, as shown in figure 1. Then the combined material enters the additional drying chamber T3, is held between the discharge rollers 70, 71 and fed to further processing.

Such further processing primarily involves peeling the substrate 6 from the front layer 1, which opens the visible side of the surface layer 1, respectively, the upper side is made gas-permeable multi-layer synthetic leather.

After peeling the substrate 6, the outer surface of the front layer 1 if necessary, you can provide a lacquer layer 4 and/or subjected to embossing, imitating the texture of natural leather or other material.

In accordance with another embodiment shown in figure 2 (the numbering of the layers is similar to figure 1), gas-permeable artificial leather, in addition to the intermediate layer 2 contains another intermediate layer 5 located between the outer layer 1 and the intermediate layer 2.

As the show is about figure 3, after forming on a substrate 6 of the front layer 1 of the first additional node II of this form if necessary provided additional intermediate layer 5, which also made the doctor applying polyurethane foam with an open pore structure and subsequent drying in the respective drying chamber T2.

Directly after the formation of the additional intermediate layer 5 implement the above operation of applying the intermediate layer 2 processing unit III and subsequent overlay layer 3, as well as additional processing of the formed multilayer gas-permeable artificial leather.

An example of carrying out the invention

Aqueous aliphatic polyurethane dispersion designed for forming the front layer 1, was obtained by mixing the hard component in the form of anionic aliphatic polyetherurethane dispersion, solid content, which was about 40%, is used as the soft component anionic aliphatic polyetherurethane dispersion on the basis of simple and complex esters, solid content, which was about 40%, in an approximate ratio of 80:20 mass, and further stirring with 10 mass aluminum hydroxide as a flame retardant means 35 mass water, 5 mass ethanol ka is este solvent, 5 mass pigment dispersion, after which the resulting mixture was sprayed through a nozzle diameter of 0.8 mm with inlet pressure, amounting to 0,6 bar, and pressure spray ploskopanelnyh head, amounting to 1.5 bar, on a smooth separation paper with a surface temperature of 176°C.

Upon completion implemented in the absence of film formation drying formed on the front substrate layer of a thickness of 33 μm was wspanialy recipes, including aliphatic waterborne polyurethane dispersion with a mass ratio of hard and soft components 80:20, 28 mass aluminum hydroxide as flame retardant additives and auxiliary substances in the form of 4.5 mass aqueous ammonium stearate, 3 massc water sulfate, aliphatic alcohol, 0,8 mass acrylic thickener, 0,2 mass ammonia and 5 mass pigment dispersion, obtaining the foamed composition weight 500 g/l, which were applied to the front layer by knife doctor blade receiving layer, the thickness of which in wet was 400 μm. The thickness of the layer of foam after drying was about 250 microns.

Then wet the intermediate layer kasaravalli knitted fabric cotton/polyester, and aggregate structure after drying was taken away millimetre from the separation of paper.

The combined material was lakirovanie in accordance with the requirements before the show to materials, used as interior trim of the car, and subjected to vacuum embossing that mimic the texture of natural leather.

Breathability is made of the combined material was 5.25 l/DM2/min at pressure tested to 200 PA, and the average diameter of pores in the facial layer was about 60 μm.

Made of artificial leather meets the requirements for the inside upholstery hire requirements and due to its inherent permeability may find application, for example, as upholstery, providing especially high comfort seat.

Figure 4 shows obtained using a microscope with a strong increase a picture of the front layer manufactured by the above instant drying. Well see individual drops of aqueous polyurethane dispersions, between which are micropores. The diameter of pores on the separate areas of your picture is 58 microns, 75 microns, respectively.

1. A method of manufacturing a multilayer gas-permeable artificial leather with a layer of base (3) of the textile flat material forms at least one deposited on a layer basis (3) intermediate layer (2, 5) on the basis of polyurethane foam with at least a partially open porous structure, as well as the front layer (1) on the basis of polyurethane applied over the entire surface on men is our least one intermediate layer (2, 5), with the first stage on the peelable substrate (6) is applied and reinforce the front layer (1), then on the front layer (1) causing at least one intermediate layer (2, 5), and then at least one intermediate layer (2, 5) place a layer of base (3)and the substrate (6) prepare the chin from the front layer (1), characterized in that for forming the front layer (1) on a substrate (6) is applied aqueous aliphatic polyurethane dispersion in a liquid the form and directly after application of the polyurethane dispersion is evaporated it in the water by heat within a time interval not longer than 5 s, which promotes drying polyurethane dispersion on the substrate (6) without the film formation with a formation containing micropores of the surface layer (1).

2. The method according to claim 1, characterized in that the front layer (1) create a micropore diameter of from 10 to 70 microns.

3. The method according to claim 1, characterized in that for forming the front layer uses polyurethane dispersion with a solids content from 30%to 60%.

4. The method according to claim 1, characterized in that for forming the front layer (1) spray polyurethane dispersion on a substrate (6) in the form of droplets through the nozzle.

5. The method according to claim 1, characterized in that for forming the front layer (1) polyurethane dispersion is applied on a substrate (6) printing.

6. Spasibo to claim 1, characterized in that the substrate (6) is infinite canvas with which to warm up to the temperature of evaporation is contained in the polyurethane dispersion water is passed through at least one heated roller.

7. The method according to claim 1, characterized in that applied on the substrate (6) polyurethane dispersion with the aim of evaporation of the contained water is heated by heat and/or microwave radiation.

8. The method according to claim 1, characterized in that the heat down from the substrate (6).

9. The method according to claim 1, characterized in that on the substrate (6) put the front layer (1) with a thickness of 5 to 150 μm, preferably from 30 to 100 μm.

10. The method according to claim 1, characterized in that on the substrate (6) put the front layer, the mass of which in the dry state is from 10 to 50 g/m2, preferably from 30 to 40 g/m2.

11. The method according to claim 1, characterized in that the substrate (6) use a polymer film, siliconized textile material, siliconized paper, a metal substrate or provided with a coating of polytetrafluoroethylene fabric.

12. The method according to claim 1, characterized in that the facing layer (1) side of the substrate (6) are subjected to surface profiling.

13. The method according to claim 1, characterized in that used for forming the front layer (1) polyurethane dispersion function is miscible with water, low-boiling organic solvent.

14. The method according to claim 1, characterized in that on the front layer (1), respectively, previously deposited intermediate layer (5), by means of a doctor blade is applied at least one intermediate layer (2, 5).

15. The method according to claim 1, characterized in that use intermediate layer (2) of foam weighing from 200 to 700 g/l, preferably from 300 to 600 g/l, more preferably from 400 to 500 g/l, and a thickness of from 200 to 1000 μm, applied to the front layer (1) by means of a doctor blade.

16. The method according to claim 1, characterized in that on the front layer (1), respectively, on the intermediate layer (5), by means of a doctor blade consistently put two intermediate layers (2, 5) thickness of from 200 to 800 μm each.

17. The method according to item 16, wherein the weight applied to the front layer by a doctor blade of the first intermediate layer (5) of the foam is from 300 to 700 g/l, preferably from 400 to 600 g/l, and the second intermediate layer (2) of foam from 200 to 600 g/l, preferably from 300 to 500 g/L.

18. The method according to claim 1, wherein creating the intermediate layers (2, 5) with an average pore size of 100 to 200 microns.

19. The method according to claim 1, characterized in that at least one intermediate layer (2, 5) and/or the front layer (1) sew by adding isocyanate or melamine.

20. The method according to claim 1, characterized in that after peeling the substrate (6) on the side facing layer (1), the most-the ing from the at least one intermediate layer (2, 5), to cause the lacquer layer (4).

21. The method according to claim 1, characterized in that after peeling the substrate (6) the surface of the surface layer (1) is subjected to embossing.

22. The method according to item 21, wherein the surface of the surface layer (1) TISNET vacuum embossing.

23. The method according to item 21, wherein using the profile stamping with sharp edges.

24. The method according to claim 1, characterized in that as the layer of base (3) using the prepreg, fabric, knitted fabric, non-woven material or combinations thereof impregnated or without impregnation.

25. The method according to one of claims 1 to 24, characterized in that the layer of the base (3) impose on the incompletely dried intermediate layer (2), so that the layer of the base (3) at least partially immersed in the intermediate layer (2).

26. Multilayer gas-permeable artificial leather with a layer of base (3) of the textile flat material forms at least one deposited on a layer basis (3) intermediate layer (2, 5) on the basis of polyurethane foam with at least a partially open pore structure, as well as one outer layer (1) on the basis of polyurethane applied over the entire surface on at least one intermediate layer (2, 5), characterized in that the containing micropores front layer (1) formed from the dried in the absence of film formation of aqueous aliphatic polyurethane dispersion.

27. Mn is geloina gas-permeable artificial leather on p, characterized in that the front layer (1) contains micropores with a diameter of from 10 to 70 microns.

28. Multilayer gas-permeable artificial leather on p, characterized in that the thickness of the surface layer (1) is from 5 to 150 microns.

29. Multilayer gas-permeable artificial leather on p, characterized in that the mass of the deposited surface layer in the dry state is from 10 to 50 g/m2, preferably from 30 to 40 g/m2.

30. Multilayer gas-permeable artificial leather on p, wherein is provided an intermediate layer (2) foam thickness from 200 to 1000 μm, the weight of which ranges from 200 to 700 g/l, preferably from 300 to 600 g/l, more preferably from 400 to 500 g/L.

31. Multilayer gas-permeable artificial leather on p, characterized in that there are two successive intermediate layer (2, 5) thickness of from 200 to 800 μm, adjacent to the front layer (1), respectively, the intermediate layer (5).

32. Multilayer gas-permeable artificial leather on p, characterized in that the weight printed on the front layer of the first intermediate layer (5) of the foam is from 300 to 700 g/l, preferably from 400 to 600 g/l, and the second intermediate layer (2) of foam from 200 to 600 g/l, preferably from 300 to 500 g/L.

33. Multilayer gas-permeable artificial leather on p, ex is different, however, the average pore size of the intermediate layers (2, 5) is from 100 to 200 microns.

34. Multilayer gas-permeable artificial leather on p, characterized in that at least one intermediate layer (2, 5) and/or the front layer (1) crosslinked by adding isocyanate or melamine and/or contain functional fillers.

35. Multilayer gas-permeable artificial leather on p, characterized in that on the side of the front layer (1), more remote from the at least one intermediate layer (2, 5), lacquer layer (4).

36. Multilayer gas-permeable artificial leather on p, characterized in that the surface of the surface layer (1) is subjected to embossing.

37. Multilayer gas-permeable artificial leather on p, characterized in that the used profile stamping with sharp edges.

38. Multilayer gas-permeable artificial leather on p, characterized in that as a layer basis (3) used the prepreg fabric, knitted fabric, non-woven material or combinations thereof impregnated or impregnated with polyurethane.

39. Multilayer gas-permeable artificial leather on one of p-38, characterized in that the layer of the base (3) is in an intermediate layer (2) at least in a partially filled condition.



 

Same patents:

Simulated leather // 2307208

FIELD: leather and textile industry.

SUBSTANCE: invention relates to new layered materials with polymer coating and to a process of manufacture thereof, in particular to manufacture of simulated leathers, which can be employed as furniture upholstery in interiors motor cars, aircrafts, and water transport as well as technical- and special-destination articles. Simulated leather includes interconnected knitted backing made from polyamide threads and containing polyurethane and polyurethane film based on 4,4'-diphenylmethanediisocyanate and polytetramethylene ether glycol. Knitted backing further contains polyurethane threads "spandex" knitted through each second row at weight ratio of the latter to polyamide threads 1:(1-2). Polyurethane contained in knitted backing and polyurethane film additionally contain modifier: phosphorus-boron-containing polyol having following formula: , where R represents -CH2-CH2-, p=1, q=3, and m=2, while amount of polyurethane in knitted backing is 10-12% of the weight of backing.

EFFECT: improved complex of performance characteristics including fireproofness, high extensibility, and bond strength between layers, while preserving their high physicochemical properties of textile materials.

1 tbl, 4 ex

FIELD: polymer materials.

SUBSTANCE: polymer composition for preparing face coating of artificial leather for upper containing 54.8-59.5% of 25% dimethylformamide solution of polyurethane "Vitur P-0112" and 14.2-15.5% of dimethylformamide further contains additive: powdered interpolymer complex based on polyacrylic acid, sodium polyphosphate and monobasic dipyridyl (9.5-16.8%) and, additionally, isopropyl alcohol (14.2-15.5%). Once applied onto substrate, composition is hardened with 10-30% aqueous dimethylformamide solution. Coating increases hygroscopicity from 2.1 to 16.5%, wettability from 106.2 to `60% for 2 h and from 149.8 to 175% for 24 h.

EFFECT: considerably improved hygienic properties of material, achieved rather high vapor-permeability characteristics and physicomechanical properties at satisfactory percentage of shrinkage during drying of face coating.

2 tbl

FIELD: light industry; polymer fabric materials welded by high-frequency currents for inflatable floating devices and medical purpose.

SUBSTANCE: proposed multi-layer hermetic elastic cold-resistant material of artificial leather type includes textile warp at surface density of 60-150 g/m2 made from synthetic complex threads at linear density of 9-19 tex and twist of 200±20 per meter, adhesive layer formed from solution of polyester urethane solution in dimethyl formamide at viscosity of 50-70 poises and polyisocyanate at viscosity of 1.5 poises at their mass ratio of 1:0.005-0.02 and face polymer coat on base of polyester urethane solution in dimethyl formamide at viscosity of 150-250 poises applied in 2-4 layers at ratio of layers in material by mass :textile warp: adhesive layer: face polymer coat of 1:0.1-0.2:0.7-2. According to another version, material includes textile warp at surface density of 60-150 g/m2 made from synthetic complex threads at linear density of 9-18 tex and twist of 200±20 per meter, adhesive layer formed from polyester urethane solution in dimethyl formamide at viscosity of 50-70 poises and polyisocyanate at viscosity of 1.5 poises at mass ratio of 1:0.005-0.02 which is located on wrong and face sides of warp followed by forming face polymer coat on both sides on base of polyester urethane solution in dimethyl formamide at viscosity of 150-250 poises applied in one layer on wrong side and in 2-4 layers on face side at mass ratio of layers in material: textile warp: adhesive layer: face polymer coat of 1:0.-0.4:1-2. Proposed material possesses water and air tightness, high strength of weld seams and bonding of coat with warp.

EFFECT: enhanced efficiency; improved quality of material.

3 cl, 2 tbl, 19 ex

The invention relates to the footwear industry and relates, in particular, lining, heel shoes, used in the Shoe industry

Artificial leather // 2142030
The invention relates to a new multi-layered materials, namely the artificial leather on a knitted base with polyurethane protective layer and can be used in light industry for the manufacture of Shoe uppers, coats, jackets, protective clothing, goods for tourism, transport, furniture

Artificial leather // 2134737
The invention relates to a new multi-layer materials with a polymer coating, in particular to artificial leather, which can be used in the textile industry for the manufacture of material suitable for upholstery in the salons of the auto, air and hydraulic, as well as for technical and special purpose

Artificial leather // 2026911
The invention relates to light industry and the development of artificial skin used for various consumer products, including decorative finishes optical engineering

The invention relates to the production of artificial leather for shoes

FIELD: construction industry.

SUBSTANCE: manufacturing method of floor covering involves preparation of glass-fibre mat roll, application of primer and front coatings, printing of patterns and application of transparent coating, application of PVC flakes, application of the second transparent coating, application of rear PVC coating, mechanical stamping of face coating and application of UV protection lacquer.

EFFECT: optimum speed choice of cloth supplied in automated line for manufacturing floor covering, choice of the most implemented patterns, chromaticity, shades of pictures, obtaining the appropriate cloth flexibility and consumer density of new material.

FIELD: process engineering.

SUBSTANCE: invention relates to floor coating shaping and can be used in production processes. Proposed method in consisting in using available production facilities cooling to technologically expedient temperatures in applying a number of techniques, as well as in creating conditions for solidification of coating surface layer, turning over the coating through 180° on using coat paint and lacquer layers, the coat being moved at 25 m/min rate.

EFFECT: expanded performances.

FIELD: chemistry.

SUBSTANCE: invention relates to multilayer, tent covering material. The material contains a polyester base and a double-sided polyvinyl chloride coating. The polyester base is flat knitted linen, made from polyester thread of 100-111 tex, with 200-400 filaments in the thread and 85-400 windings per metre. Mass ratio of layers front : intermediate : back equals 1.1:1:1.6 respectively. Mass ratio of layers of polyester base and polymer coating is 1:2.7. The polymer coating is obtained, based on suspended polyvinyl chloride and additionally contains a mixture of dioctylphthalate and dioctyl sebacate plasticizers, Vitur T thermoplastic polyurethane, synthetic butadiene-acrylo-nitric rubber BNKS -28, copolymer of methyl methacrylate, butadiene and styrene KANE ACE B-28A. The stabilisers used are barium-, cadmium-, zinc-containing Vigostab BKT complex stabilisers. The antipyretic additive is antimony trioxide and chloroparaffin CP-1100. The coating also contains a fungicide - salicylic acid alinide, processing additive - stearic acid and pigments.

EFFECT: good fatigue properties in static and dynamic conditions, high frost resistance (up to -60 °C), fire-resistance and resistance to action of microorganisms.

1 cl, 6 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to multilayer, tent covering material. The material contains a polyester base and a double-sided polyvinyl chloride coating. The polyester base is flat knitted linen, made from polyester thread of 100-111 tex, with 200-400 filaments in the thread and 85-400 windings per metre. Mass ratio of layers front : intermediate : back equals 1.1:1:1.6 respectively. Mass ratio of layers of polyester base and polymer coating is 1:2.7. The polymer coating is obtained, based on suspended polyvinyl chloride and additionally contains a mixture of dioctylphthalate and dioctyl sebacate plasticizers, Vitur T thermoplastic polyurethane, synthetic butadiene-acrylo-nitric rubber BNKS -28, copolymer of methyl methacrylate, butadiene and styrene KANE ACE B-28A. The stabilisers used are barium-, cadmium-, zinc-containing Vigostab BKT complex stabilisers. The antipyretic additive is antimony trioxide and chloroparaffin CP-1100. The coating also contains a fungicide - salicylic acid alinide, processing additive - stearic acid and pigments.

EFFECT: good fatigue properties in static and dynamic conditions, high frost resistance (up to -60 °C), fire-resistance and resistance to action of microorganisms.

1 cl, 6 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to multilayer, tent covering material. The material contains a polyester base and a double-sided polyvinyl chloride coating. The polyester base is flat knitted linen, made from polyester thread of 100-111 tex, with 200-400 filaments in the thread and 85-400 windings per metre. Mass ratio of layers front : intermediate : back equals 1.1:1:1.6 respectively. Mass ratio of layers of polyester base and polymer coating is 1:2.7. The polymer coating is obtained, based on suspended polyvinyl chloride and additionally contains a mixture of dioctylphthalate and dioctyl sebacate plasticizers, Vitur T thermoplastic polyurethane, synthetic butadiene-acrylo-nitric rubber BNKS -28, copolymer of methyl methacrylate, butadiene and styrene KANE ACE B-28A. The stabilisers used are barium-, cadmium-, zinc-containing Vigostab BKT complex stabilisers. The antipyretic additive is antimony trioxide and chloroparaffin CP-1100. The coating also contains a fungicide - salicylic acid alinide, processing additive - stearic acid and pigments.

EFFECT: good fatigue properties in static and dynamic conditions, high frost resistance (up to -60 °C), fire-resistance and resistance to action of microorganisms.

1 cl, 6 tbl, 9 ex

FIELD: personal demand items.

SUBSTANCE: colour match is provided for the items containing various materials of bases. Composition of the coating is chosen so that it can be applied to various materials of bases thus in general maintaining equal visual characteristics of the item. Bases can contain flexible materials such as natural leather, synthetic leather, vinyl, foam, cloth and the like. The item includes the first base having the first flexible material, the second base having the second material different from the first material, the coating with colour match, which is made on the basis of solvent or on the basis of water dispersion of polymeric material, which contains polyurethane, and covers at least the section of the first base and at least the section of the second base. Examples of the items are footwear, automobile upholstery and automobile interiors. Manufacturing method of the item including the first and the second flexible bases made from various materials includes the following: the coating of at least the section of the first flexible base by the composition of the coating with colour match as per item 1 of the formula; and the coating of at least the section of the second flexible base by the composition of the coating with colour match as per item 1 of the formula.

EFFECT: there shall preferably be provided the composition of the coating capable of covering various types of bases of the item, and at the same time excluding the necessity of levelling colours.

23 cl, 2 dwg, 12 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to floor coating and can be used individually or industrially for floor coating in apartments and manufacturing facilities. The floor coating is polyvinyl chloride foam. Cost-effectiveness lies in use of available agents for cooling to technologically feasible temperature, creation of conditions for hardening of the surface layer of the fabric, possibility of turning the fabric by 180 degrees when there is need to use dyeing and lacquer coatings at rate of movement of the fabric of up to 25 m/min.

EFFECT: effect of sensory and organoleptic perception of natural species of wood and/or stones.

FIELD: chemistry.

SUBSTANCE: foamable composition for obtaining foamed products contains polyvinylchloride, primary plasticiser, if necessary, other additives and as alkyl ester of benzoic acid, isononyl ester of benzoic acid in amount from 5 to 95 wt %, counting per weight of all available plasticiser, which constitutes 10 to 400 wt.p. per 100 wt.p. of polyvinylchloride. Method of product obtaining, which contains at least one foamed layer of polyvinylchloride consists in application of foamed composition on carrier, before and after application it is foamed and in conclusion it is thermally processed. Product represents covering for floors, artificial leather and wallpapers.

EFFECT: reduction of composition viscosity, temperature of its gelatinisation, which results in simple and quicker composition processing.

11 cl, 8 tbl, 5 ex

FIELD: construction.

SUBSTANCE: said utility invention relates to floor coverings and may be used by individuals or in industry for floor covering in residential flats and industrial premises. The floor covering manufacture method involves operations of the application of PVC coatings using the air cushion for the preservation of the printed layer(s), levelling of the web edges, creation of stock of the floor covering rolled in the process of its coating, tensioning, drying, and cooling; along with a number of auxiliary operations related to the collection of excessive covering mass. The invention ensures cost effectiveness of the process, consisting in the selection of the most optimal operations of manufacture and inspection of the web proper, in the process of application of the coatings and the ultraviolet lacquer, the process of web tension synchronisation in various periods of its processing, the operations of linoleum web cooling, and other operations related to careful treatment of the covering, for example, during web rotation using the air cushion.

EFFECT: increased cost effectiveness of floor covering manufacture process.

1 ex

FIELD: formation of covering with selectively formed embossment.

SUBSTANCE: method involves applying plastic layer containing print ink comprising photoinitiator onto substrate; providing gelling and softening of non-hardened coating; softening hardening coating on plastic layer, which had been gelled; providing mechanical embossment of softened hardened coating; activating photoinitiator and hardening said coating of portions on top of indicated print ink; heating for fusing of hardened coating and plastic layer; activating hardened photoinitiator of hardened coating for hardening of said coating on portions free of print ink.

EFFECT: increased efficiency in creating of surface texture effect by providing relatively high embossment depth.

25 cl, 4 dwg, 4 tbl

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

Up!