阅读说明：本技术 一种耐磨性好、具有类肤手感的人造革及其制备方法 (Artificial leather with good wear resistance and skin-like hand feeling and preparation method thereof ) 是由 戴安琪 黄伟 刘建红 宋伟锋 程好 杨胜 管世伟 喻冬青 于 2020-05-14 设计创作，主要内容包括：本发明涉及皮革加工技术领域,具体涉及一种耐磨性好、具有类肤手感的人造革及其制备方法,所述人造革由从上到下依次分布的多功能处理剂层、基于PU材料的表皮层、基于PVC材料的中间层、胶水层以及基布层组成；所述多功能处理剂层由WPU-1树脂、交联剂、流平剂、消泡剂、增稠剂和多功能助剂制成。本发明具有耐磨性好、具有类肤手感的优点。(The invention relates to the technical field of leather processing, in particular to artificial leather with good wear resistance and skin-like hand feeling and a preparation method thereof, wherein the artificial leather consists of a multifunctional treating agent layer, a surface layer based on a PU material, a middle layer based on a PVC material, a glue layer and a base cloth layer which are sequentially distributed from top to bottom; the multifunctional treating agent layer is prepared from WPU-1 resin, a cross-linking agent, a flatting agent, a defoaming agent, a thickening agent and a multifunctional auxiliary agent. The invention has the advantages of good wear resistance and skin-like hand feeling.)

1. The artificial leather with good wear resistance and skin-like hand feeling is characterized by comprising a multifunctional treating agent layer, a surface layer based on a PU material, a middle layer based on a PVC material, a glue layer and a base cloth layer which are sequentially distributed from top to bottom;

the multifunctional treating agent layer is prepared from WPU-1 resin, a cross-linking agent, a flatting agent, a defoaming agent, a thickening agent and a multifunctional auxiliary agent.

2. The artificial leather according to claim 1, wherein the multifunctional primer layer is made of 100 parts of WPU-1 resin, 2-10 parts of cross-linking agent, 0.1-5 parts of leveling agent, 0.1-5 parts of antifoaming agent, 1-15 parts of thickener and 1-20 parts of multifunctional auxiliary; the skin layer based on the PU material comprises the following components in parts by weight: 100 parts of WPU-2 resin, 2-7 parts of cross-linking agent, 0.1-2 parts of flatting agent, 0.1-2 parts of defoaming agent, 1-5 parts of thickening agent and 2-6 parts of color paste.

3. Artificial leather according to claim 2, wherein the WPU-1 and WPU-2 resins are one or more of aliphatic polyurethane, alicyclic polyurethane, aromatic polyurethane of polycarbonate type or polyether type; the cross-linking agent is one of waterborne blocked or unblocked aliphatic, alicyclic and aromatic polyisocyanates; the flatting agent is one or more of polydimethylsilane, polymethylphenylsiloxane, polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane; the defoaming agent is an organic silicon defoaming agent; the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose and hydroxyethyl cellulose.

4. Artificial leather according to claim 2, characterised in that the WPU-2 resin has a tensile strength of 1-35MPa at 100% modulus according to DIN 53504 test and contains at least one WPU resin with a solids content of 40-70%.

5. The artificial leather according to claim 1, wherein the multifunctional auxiliary comprises the following components in parts by weight: 100 parts of wax emulsion, 10-30 parts of high-density polyethylene, 10-40 parts of zirconium phosphate, 0.5-5 parts of defoaming agent, 1-15 parts of thickening agent and 1-30 parts of deionized water.

6. The artificial leather according to claim 5, wherein the wax emulsion is one or more of palm wax emulsion, polyethylene wax emulsion, high-density polyethylene wax emulsion and polytetrafluoroethylene wax emulsion, preferably one or two of high-density polyethylene wax emulsion and polytetrafluoroethylene wax emulsion; the particle size of the high-density polyethylene is 20-200 μm, preferably 20-100 μm; the particle size of the zirconium phosphate is 1-10 μm, preferably 1-5 μm; the defoaming agent is an organic silicon defoaming agent; the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose and hydroxyethyl cellulose.

7. Artificial leather according to claim 1, characterised in that said PVC-based intermediate layer comprises the following components in parts by weight: 100 parts of PVC resin, 75-95 parts of plasticizer, 1-20 parts of heat stabilizer, 0-5 parts of foaming agent, 0.1-3 parts of flatting agent and 0.1-5 parts of aging resistant agent; the glue layer is one or two of PVC or modified grafted PVC; the base fabric layer is knitted fabric.

8. Artificial leather according to claim 7, wherein said PVC resin is a resin having a K value between 65 and 80; the plasticizer is one or more of phthalate plasticizers, aliphatic dibasic acid ester plasticizers, trimellitate plasticizers and epoxy vegetable oil plasticizers; the heat stabilizer is one or more of calcium stearate, calcium castor oil, zinc stearate, barium stearate and lanthanum stearate; the foaming agent is an AC foaming agent; the flatting agent is one or more of polydimethylsilane, polymethylphenylsiloxane, polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane; the aging resistant agent is one or more of benzophenone aging resistant agent, benzotriazole aging resistant agent and triazine aging resistant agent.

9. A method for preparing artificial leather according to any one of claims 1 to 8, comprising the steps of:

(1) premixing multifunctional auxiliary agent slurry: mixing the wax emulsion, the high-density polyethylene, the zirconium phosphate, the defoaming agent, the thickening agent and the deionized water, and filtering to obtain filtrate, namely the multifunctional auxiliary agent slurry;

(2) premixing multifunctional treating agent slurry: mixing WPU-1 resin, a cross-linking agent, a flatting agent, a defoaming agent, a thickening agent and multifunctional additive slurry, and filtering to obtain filtrate, namely multifunctional treating agent slurry;

(3) skin slurry premixing: mixing WPU-2 resin, a cross-linking agent, a leveling agent, a defoaming agent, a thickening agent and color paste, and filtering to obtain filtrate, namely the skin slurry;

(4) premixing intermediate layer slurry: mixing PVC resin, a plasticizer, a heat stabilizer, a foaming agent, a flatting agent and an aging-resistant agent, and filtering to obtain filtrate, namely intermediate layer slurry;

(5) preparing artificial leather: and (3) preparing the base cloth layer, the glue layer, the middle layer slurry and the surface slurry according to a from-bottom-to-top sequence to obtain a PVC artificial leather semi-finished product by a release paper coating method, and coating the PVC artificial leather semi-finished product with the multifunctional treating agent slurry to obtain the artificial leather.

10. The preparation method according to claim 9, wherein in the step (1), the wax emulsion, the high-density polyethylene and the defoaming agent are mixed, then the zirconium phosphate is added, finally the thickening agent and the deionized water are added, and the filtrate is filtered, namely the multifunctional auxiliary agent slurry; in the step (2), firstly, mixing the WPU-1 resin, the leveling agent, the defoaming agent and 10-20% of the multifunctional additive slurry, then sequentially adding the thickening agent, the rest multifunctional additive slurry and the crosslinking agent, and filtering to obtain filtrate, namely the multifunctional treating agent slurry; in the step (3), the WPU-2 resin, the flatting agent, the defoaming agent and the color paste are mixed, then the thickening agent is added, finally the crosslinking agent is added, and the mixture is filtered, so that the filtrate is the skin slurry.

Technical Field

The invention relates to the technical field of leather processing, in particular to artificial leather with good wear resistance and skin-like hand feeling and a preparation method thereof.

Background

In recent years, with the blowout of the automobile yield in China, particularly the year-by-year increase of the proportion of middle and high-end automobiles, the cognitive level of a user on the automobile is rapidly improved, and the requirement on the automobile is continuously improved. More and more users are no longer limited to the visual requirements of the appearance of the automobile model, and the design of the automobile interior and the sensory enjoyment brought by the automobile interior become new focuses of attention. The interior trim is the part which has the longest time of close contact with a user in the process of carrying the user by the automobile, the importance of the interior trim even exceeds the appearance shape of the automobile, and the interior trim becomes the primary concern of part of users.

The artificial leather is widely applied as the most main automotive interior material, wherein PVC and PU materials are the most common, and in terms of the current technical level, the aqueous PU artificial leather has shorter development time, poorer product performance than an oily PU product and overhigh cost, so that the aqueous PU artificial leather cannot be further popularized and used, and particularly the application of the aqueous PU is further limited at present when the automotive industry is saturated. The raw materials in the production process of the oily PU artificial leather contain a large amount of solvents, so that the oily PU artificial leather has higher VOC exceeding risk and certain potential safety hazard. In addition, the PU material itself has a characteristic of being easily hydrolyzed, and if the PU material is used alone as an artificial leather for automobile interiors, there is a high risk of cracking and peeling of the artificial leather due to hydrolysis. The PVC artificial leather serving as an artificial leather material with better comprehensive performance has certain disadvantages in wear resistance and hand feeling compared with PU artificial leather all the time, so that designs such as patterns are difficult to maintain for a long time. Researchers have made a series of innovative attempts to solve the above problems.

The Chinese patent application CN108252113A discloses a wear-resistant PVC leather base material for vehicles and a manufacturing process thereof, wherein the wear-resistant PVC leather base material comprises the following raw materials: base fabric, 100 parts of PVC resin, 40-45 parts of plasticizer, 6-8 parts of heat stabilizer, 0.5-0.8 part of light stabilizer, 0.7-0.9 part of antioxidant, 4-6 parts of dispersant, 3-5 parts of deodorant, 0.3-0.5 part of colorant, 10-15 parts of flexibilizer and 8-10 parts of reinforcing agent. The toughening agent is one or more of chlorinated polyethylene, acrylates and ethylene-vinyl acetate copolymer, and the reinforcing agent is one or more of calcium carbonate, zeolite, barium sulfate, kaolin, vermiculite, talcum powder, mica and montmorillonite. This patent application adopts the automobile-used PVC leather substrate production mode of basis can carry out the volume production to automobile-used PVC leather, can effectively improve wearability, toughness and the intensity of product through toughening agent and reinforcing agent.

Chinese patent CN106592259A discloses a wear-resistant PVC decorative artificial leather, which is prepared by calendering wear-resistant PVC slurry, wherein the wear-resistant PVC slurry is prepared from the following components in parts by weight: PVC resin powder, modified epoxidized soybean oil, non-heavy metal color cakes, a stabilizer, a foaming agent, modified pitchstone and camphorwood powder; this patent is through the synergism of modified pitchstone with the camphorwood powder through handling, can very big improvement synthetic leather's wear resistance to its wearability can not descend along with the time increase, very big improvement life, can satisfy the operation requirement of easy damaged leather products such as shoes package, house.

However, both the chinese patent application CN108252113A and the chinese patent CN106592259A achieve the improvement of the wear resistance of PVC material by adding inorganic filler or wood powder, and have the following technical problems:

(1) the improvement of the wear resistance of the PVC artificial leather is very limited, and the bottleneck of the PVC material cannot be broken through;

(2) compared with PU artificial leather, the artificial leather made of PVC material has stronger plastic feeling in hand feeling.

Chinese patent application CN102943377A discloses a water-based PU waterproof resin for artificial leather, which is composed of the following raw materials in percentage by weight: 35-40% of water-based fluorosilicone resin, 20-25% of water-based hydroxyl crosslinking agent, 15-35% of water, 0.3-0.5% of water-based wax emulsion, 1.5-2.5% of organic silicon oil smoothing agent, 0.5-1% of organic silicon flatting agent, 3-5% of organic silicon defoaming agent, 2-6% of water-based modified polyethylene wax emulsion and 1-2% of water-based polyurethane thickener. The water-based PU waterproof resin for artificial leather provided by the patent application uses water as a solvent, replaces toxic solvents such as dimethyl formamide and butanone, and has the advantages of non-combustibility, safety, environmental protection, cost saving and the like. The finished product prepared from the water-based PU waterproof resin for artificial leather has the advantages of full hand feeling, high brightness, strong smooth wax hand feeling, fine texture and good air permeability; the artificial leather has excellent comprehensive effects of hand feeling, smoothness, water resistance, wax feeling and the like. However, the surface of the artificial leather is smooth and waxy, the dryness degree of the artificial leather is different from the skin-like hand feeling, and the prepared artificial leather has poor wear resistance.

Therefore, it is necessary to develop an artificial leather having a skin-like touch and excellent abrasion resistance, which can solve the above-mentioned problems, and a method for preparing the same.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the artificial leather with good wear resistance and skin-like hand feeling and the preparation method thereof.

The invention is realized by the following technical scheme:

an artificial leather with good wear resistance and skin-like hand feeling comprises a multifunctional treating agent layer, a skin layer based on a PU material, a middle layer based on a PVC material, a glue layer and a base cloth layer which are distributed from top to bottom in sequence; the multifunctional treating agent layer is prepared from WPU-1 resin, a cross-linking agent, a flatting agent, a defoaming agent, a thickening agent and a multifunctional auxiliary agent.

The structure of artificial leather is shown in detail in fig. 1.

Preferably, the multifunctional treating agent layer is prepared from 100 parts of WPU-1 resin, 2-10 parts of a cross-linking agent, 0.1-5 parts of a leveling agent, 0.1-5 parts of a defoaming agent, 1-15 parts of a thickening agent and 1-20 parts of a multifunctional auxiliary agent.

More preferably, the WPU-1 resin is one or more of polycarbonate type or polyether type aliphatic polyurethane, alicyclic polyurethane and aromatic polyurethane.

More preferably, the WPU-1 resin has a solids content of 20-40%.

More preferably, the crosslinking agent is one of aqueous blocked or unblocked aliphatic, alicyclic and aromatic polyisocyanates.

More preferably, the leveling agent is one or more of polydimethylsilane, polymethylphenylsiloxane, polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane.

More preferably, the defoamer is a silicone-based defoamer.

More preferably, the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose and hydroxyethyl cellulose.

Preferably, the multifunctional assistant comprises the following components in parts by weight: 100 parts of wax emulsion, 10-30 parts of high-density polyethylene, 10-40 parts of zirconium phosphate, 0.5-5 parts of defoaming agent, 1-15 parts of thickening agent and 1-30 parts of deionized water.

More preferably, the wax emulsion is one or more of palm wax emulsion, polyethylene wax emulsion, high-density polyethylene wax emulsion and polytetrafluoroethylene wax emulsion.

More preferably, the wax emulsion is one or both of a high density polyethylene wax emulsion, a polytetrafluoroethylene wax emulsion.

The high density polyethylene is a powdered solid.

More preferably, the high density polyethylene has a particle size of 20 to 200 μm.

More preferably, the high density polyethylene has a particle size of 20 to 100 μm.

The zirconium phosphate is a powdery solid.

More preferably, the particle size of the zirconium phosphate is 1 to 10 μm.

More preferably, the particle size of the zirconium phosphate is 1 to 5 μm.

More preferably, the defoamer is a silicone-based defoamer.

More preferably, the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose and hydroxyethyl cellulose.

Preferably, the skin layer based on the PU material comprises the following components in parts by weight: 100 parts of WPU-2 resin, 2-7 parts of cross-linking agent, 0.1-2 parts of flatting agent, 0.1-2 parts of defoaming agent, 1-5 parts of thickening agent and 2-6 parts of color paste.

More preferably, the WPU-2 resin is one or more of polycarbonate type or polyether type aliphatic polyurethane, alicyclic polyurethane and aromatic polyurethane.

More preferably, the WPU-2 resin has a tensile strength of 1 to 35MPa at 100% modulus according to DIN 53504 test.

More preferably, the WPU-2 resin comprises at least one WPU resin having a solids content of 40-70%.

More preferably, the WPU-2 resin is a polycarbonate type aliphatic polyurethane.

More preferably, the crosslinking agent is one of aqueous blocked or unblocked aliphatic, alicyclic and aromatic polyisocyanates.

More preferably, the leveling agent is one or more of polydimethylsilane, polymethylphenylsiloxane, polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane.

More preferably, the defoamer is a silicone-based defoamer.

More preferably, the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose and hydroxyethyl cellulose.

The color paste is a common commercially available water-based color paste.

Preferably, the PVC material-based intermediate layer comprises the following components in parts by weight: 100 parts of PVC resin, 75-95 parts of plasticizer, 1-20 parts of heat stabilizer, 0-5 parts of foaming agent, 0.1-3 parts of flatting agent and 0.1-5 parts of aging resistant agent.

More preferably, the PVC resin is a resin having a K value between 65 and 80.

More preferably, the PVC resin is a paste resin.

More preferably, the plasticizer is one or more of phthalate plasticizers, aliphatic dibasic acid ester plasticizers, trimellitate plasticizers and epoxy vegetable oil plasticizers.

More preferably, the plasticizer is one or more of dioctyl phthalate, n-butyl phthalate, glutarate, adipate, suberate, sebacate, dodecanedioate, tridecanedioate, trioctyl trimellitate, epoxy butyl oleate, epoxy octyl oleate and epoxy decyl oleate.

More preferably, the heat stabilizer is one or more of calcium stearate, castor oil calcium, zinc stearate, barium stearate and lanthanum stearate.

More preferably, the blowing agent is an AC blowing agent.

More preferably, the leveling agent is one or more of polydimethylsilane, polymethylphenylsiloxane, polydimethylsiloxane, polyether polyester modified organosiloxane and alkyl modified organosiloxane.

More preferably, the aging resistant agent is one or more of benzophenone aging resistant agent, benzotriazole aging resistant agent and triazine aging resistant agent.

More preferably, the aging resistor is one or more of 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2- (2' -hydroxy-5 ' -methylphenyl) benzotriazole, 2- (2' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chloro-benzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol and 2,4, 6-tris (2' -hydroxy-4 ' -n-butoxyphenyl).

Preferably, the glue layer is one or two of PVC or modified grafted PVC.

Preferably, the base fabric layer is a knitted fabric.

The invention also relates to a preparation method of the artificial leather, which comprises the following steps:

(1) premixing multifunctional auxiliary agent slurry: mixing the wax emulsion, the high-density polyethylene, the zirconium phosphate, the defoaming agent, the thickening agent and the deionized water, and filtering to obtain filtrate, namely the multifunctional auxiliary agent slurry;

(2) premixing multifunctional treating agent slurry: mixing WPU-1 resin, a cross-linking agent, a flatting agent, a defoaming agent, a thickening agent and multifunctional additive slurry, and filtering to obtain filtrate, namely multifunctional treating agent slurry;

(3) skin slurry premixing: mixing WPU-2 resin, a cross-linking agent, a leveling agent, a defoaming agent, a thickening agent and color paste, and filtering to obtain filtrate, namely the skin slurry;

(4) premixing intermediate layer slurry: mixing PVC resin, a plasticizer, a heat stabilizer, a foaming agent, a flatting agent and an aging-resistant agent, and filtering to obtain filtrate, namely intermediate layer slurry;

(5) preparing artificial leather: and (3) preparing the base cloth layer, the glue layer, the middle layer slurry and the surface slurry according to a from-bottom-to-top sequence to obtain a PVC artificial leather semi-finished product by a release paper coating method, and coating the PVC artificial leather semi-finished product with the multifunctional treating agent slurry to obtain the artificial leather.

Preferably, in the step (1), the wax emulsion, the high-density polyethylene and the defoaming agent are mixed, then the zirconium phosphate is added, finally the thickening agent and the deionized water are added, and the filtrate is the multifunctional auxiliary agent slurry after filtration.

More preferably, in the step (1), the wax emulsion, the high-density polyethylene and the defoaming agent are firstly mixed, and are dispersedly stirred for 5-15min under the condition of 100-300 rpm; then adding zirconium phosphate, and dispersing and stirring for 5-15min under the condition of 200-500 rpm; finally, adding a thickening agent and deionized water, and dispersing and stirring for 10-30min under the conditions of 500-1500 rpm; filtering with a 50-150 mesh screen to obtain filtrate, namely the multifunctional auxiliary agent slurry.

Preferably, in the step (2), the WPU-1 resin, the leveling agent, the defoaming agent and 10-20% of the multifunctional additive slurry are mixed, then the thickening agent, the rest multifunctional additive slurry and the crosslinking agent are sequentially added, and the filtrate is the multifunctional treating agent slurry after filtration.

More preferably, in the step (2), WPU-1 resin, a leveling agent, a defoaming agent and 10-20% of multifunctional auxiliary agent slurry are mixed firstly, and are dispersed and stirred for 5-15min under the condition of 1500-; then, under the condition of 1000-1500rpm, dispersedly stirring for 10-15 min; under the condition of 500 plus 1000rpm, the dispersion is stirred for 10-30 min; sequentially adding the thickening agent, the residual multifunctional additive slurry and the cross-linking agent, and dispersing and stirring for 20-40min under the condition of 500-1000 rpm; filtering with a 50-150 mesh screen to obtain filtrate, namely the multifunctional treating agent slurry.

Preferably, in the step (3), the WPU-2 resin, the leveling agent, the defoaming agent and the color paste are mixed, then the thickening agent is added, finally the cross-linking agent is added, and the filtrate is the skin slurry after filtration.

More preferably, the WPU-2 resin, the leveling agent, the defoaming agent and the color paste are mixed according to the measurement in the step (3), and are dispersed and stirred for 5-15min under the condition of 100-300 rpm; after uniform dispersion, adding the thickening agent according to the amount, and dispersing and stirring for 5-15min under the condition of 200-500 rpm; after the dispersion is uniform, adding the cross-linking agent according to the amount, and dispersing and stirring for 20-40min under the condition of 500-1000 rpm; filtering with 50-150 mesh sieve to obtain filtrate as epidermis slurry.

Preferably, the PVC resin, the plasticizer, the heat stabilizer, the foaming agent, the leveling agent and the aging-resistant agent are mixed in the step (4), and are dispersedly stirred for 10-30min under the condition of 200-1000 rpm; then, under the condition of 500-1500rpm, dispersedly stirring for 10-50 min; then under the condition of 2000 plus 3000rpm, dispersing and stirring for 10-50min to obtain slurry I; the slurry I is defoamed and stirred for 10-50min under the conditions of-0.08 to-0.01 MPa and 100 and 500 rpm; and filtering the defoamed slurry through a 50-150 mesh screen to obtain the intermediate layer slurry.

Preferably, in the step (5), the base fabric layer, the glue layer, the middle layer slurry and the surface slurry are prepared into a PVC artificial leather semi-finished product according to a release paper coating method from bottom to top, and then the PVC artificial leather semi-finished product is coated with the multifunctional treating agent slurry and subjected to high-temperature embossing to obtain the artificial leather.

The invention has the beneficial effects that:

the structure of the artificial leather is optimized, the artificial leather is composed of the multifunctional treating agent layer, the surface layer based on the PU material, the middle layer based on the PVC material, the glue layer and the base cloth layer which are sequentially distributed from top to bottom, the composition of the multifunctional treating agent layer is optimized, the wear resistance of the artificial leather is obviously improved, and the product has skin-like hand feeling.

The multifunctional auxiliary agent is compounded by high-density polyethylene, zirconium phosphate and wax emulsion, so that the skin-like hand feeling of the product is further improved, and the wear resistance of the artificial leather is obviously improved under the combined action of the multifunctional auxiliary agent, the structure of the artificial leather and other components. Especially, when the wax emulsion is one or two of polytetrafluoroethylene wax emulsion and high-density polyethylene wax emulsion, the wear resistance and the skin-like hand feeling of the artificial leather are remarkably improved.

The invention optimizes the preparation method of the artificial leather, and the preparation method comprises the steps of mixing the raw materials of the multifunctional additive, adding the multifunctional additive slurry for two times, adding the raw materials of the multifunctional treating agent layer, performing graded stirring and the like, and has obvious promotion effects on the wear resistance and the skin-like hand feeling of the artificial leather.

Drawings

FIG. 1 is a block diagram of an artificial leather. Wherein, 1 is a multifunctional treating agent layer, 2 is a skin layer based on PU material, 3 is a middle layer based on PVC material, 4 is a glue layer, and 5 is a base cloth layer.

FIG. 2 is a graph of sample S1 after Taber abrasion resistance testing.

Fig. 3 is a graph of a sample after a linear abrasion resistance test of sample S1. Wherein the upper part is a longitudinal test spline and the lower part is a transverse test spline.

Detailed Description

The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

The polytetrafluoroethylene wax emulsions in the examples and comparative examples of the invention were obtained from the bobo chemical materials, inc, of dongguan, model numbers: WB-T840;

the high-density polyethylene wax emulsion is purchased from Longkou Kaishu chemical technology Co., Ltd, model TL-201C.