Modified tpe artificial leather and preparation method thereof

Abstract

This invention relates to the technical field of artificial leather, and discloses a modified TPE artificial leather and its preparation method. The modified TPE artificial leather includes a base fabric, a modified TPE foam layer, and an EVA surface layer. The modified TPE foam layer is foamed from EVA, modified TPE, nano-activated calcium carbonate, foaming agent, crosslinking agent, stabilizer, release agent, and EVA color masterbatch. The modified TPE is formed by mixing and granulating TPE and TPU. The preparation method includes preparing the modified TPE, hot-pressing foaming, welding, sheeting, hot-melt adhesive bonding to the base fabric, pressing with the EVA surface layer, and surface treatment. By modifying TPE with TPU, the hardness, resilience, aging resistance, and abrasion resistance of the modified TPE are improved. Then, the modified TPE and EVA are foamed to obtain the foam layer, thus improving the overall performance of the foam layer. The soft, high-strength, and resilient EVA surface layer makes the artificial leather feel more realistic. Combined with a surface treatment layer, it enhances the artificial leather's corrosion resistance, dirt resistance, and water resistance.

Description

Technical Field

[0001] This invention relates to the technical field of artificial leather and its preparation method, and particularly to a modified TPE artificial leather and its preparation method. Background Technology

[0002] Artificial leather is a type of plastic product that resembles leather in appearance and feel and can be used to replace animal leather for animal protection purposes. It is typically made by calendering and laminating a fabric base with synthetic resin, plasticizers, and other plastic additives. Currently, the production process of decorative artificial leather in China usually uses PVC resin powder, plasticizers, heavy calcium carbonate, stabilizers, foaming agents, and colorants as the main raw materials. Artificial leather made from these components tends to harden and become brittle over time, and the addition of plasticizers can also cause environmental pollution.

[0003] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a modified TPE artificial leather that is not prone to aging, does not pollute the environment, is environmentally friendly, and does not contain plasticizers, and its preparation method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A modified TPE artificial leather includes a base fabric, a modified TPE foam layer, and an EVA surface layer arranged sequentially from bottom to top. By weight, the modified TPE foam layer is composed of 60-90 parts EVA, 20-40 parts modified TPE, 5-20 parts nano-activated calcium carbonate, 4-8 parts foaming agent, 0.2-1 part crosslinking agent, 4-10 parts stabilizer, 0.4-0.5 parts release agent, and 1 part EVA color masterbatch. The modified TPE is formed by mixing and granulating TPE and TPU.

[0007] The modified TPE artificial leather, wherein the TPE has a hardness of 30-40A; the TPU is polyester type with a hardness of 80-85A; and the modified TPE has a hardness of 60-75A.

[0008] The modified TPE artificial leather, wherein the mass ratio of TPE to TPU is 2:(1 to 1.2).

[0009] The modified TPE artificial leather, wherein the nano-active calcium carbonate has a particle size of 4000-5000 mesh.

[0010] The modified TPE artificial leather, wherein the foaming agent is an AC foaming agent with a fineness of 5-8 μm, a gas emission rate of 200-220 mL / g, and a decomposition temperature of 180-220℃.

[0011] The modified TPE artificial leather, wherein, by weight, the EVA surface layer is made of 70-80 parts EVA, 10-20 parts HDPE, 5-10 parts filler particles, and 3-5 parts color masterbatch.

[0012] The modified TPE artificial leather, wherein the base fabric is imitation cotton fleece, suede, or terry cloth, and the weight of the base fabric is 70-200 gsm.

[0013] The modified TPE artificial leather, wherein the EVA surface layer is further provided with a surface treatment layer formed of water-based PU.

[0014] A method for preparing modified TPE artificial leather includes the following steps:

[0015] TPE and TPU were mixed in a mixer with a speed of 20-50 r / min and then granulated to obtain modified TPE.

[0016] 60-90 parts of EVA, 20-40 parts of modified TPE, 5-20 parts of nano-activated calcium carbonate, 4-8 parts of foaming agent, 0.2-1 part of crosslinking agent, 4-10 parts of stabilizer, 0.4-0.5 parts of release agent, and 1 part of EVA masterbatch are mixed and plasticized in an internal mixer, then mixed and compounded in an open mill, and finally extruded into sheets through a die to obtain the mixture.

[0017] The mixture is placed in a mold and hot-pressed to foam, thus producing a sheet.

[0018] The sheet material is welded together by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material.

[0019] The first roll of material is laminated to the base fabric using a PUR laminating machine to produce the second roll of material;

[0020] The second roll of material is laminated with the EVA surface layer and embossed using a casting machine to produce the third roll of material;

[0021] The modified TPE artificial leather described above is obtained by applying water-based PU to the surface of the third roll of material, subjecting it to 80-mesh and 100-mesh matte treatments, and then drying it.

[0022] The method for preparing modified TPE artificial leather includes the following: the temperature of the open mill is 80-100℃; the temperature of the extruder is 80-110℃; the hot-press foaming specifically involves heating in a hydraulic foaming machine at a temperature of 180-215℃ for 30-45 minutes; the temperature of the casting machine is 185℃, 200℃, or 210℃, the die temperature is 220℃, and the casting speed is 8-15 m / min.

[0023] Beneficial effects:

[0024] This invention provides a modified TPE artificial leather and its preparation method. By modifying TPE with TPU, the hardness, resilience, aging resistance, and abrasion resistance of the modified TPE are improved. Then, the modified TPE and EVA are foamed to obtain a foamed layer, enhancing the overall performance of the foamed layer. The soft, high-strength, and highly resilient EVA surface layer makes the artificial leather feel more realistic. Combined with a surface treatment layer, the corrosion resistance, stain resistance, and water resistance of the artificial leather are improved. Detailed Implementation

[0025] This invention provides a modified TPE artificial leather and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the following embodiments are provided to further illustrate the invention in detail. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0026] This invention provides a modified TPE artificial leather, comprising, from bottom to top, a base fabric, a modified TPE foam layer, and an EVA surface layer. By weight, the modified TPE foam layer is composed of 60-90 parts EVA, 20-40 parts modified TPE, 5-20 parts nano-activated calcium carbonate, 4-8 parts foaming agent, 0.2-1 part crosslinking agent, 4-10 parts stabilizer, 0.4-0.5 parts release agent, and 1 part EVA color masterbatch. EVA is a rubber foaming material of ethylene-vinyl acetate copolymer, possessing excellent chemical stability, aging resistance, water resistance, corrosion resistance, resilience, and toughness. Combined with the soft, conforming, and grippy TPE, which provides better anti-slip properties, the overall performance of the foam layer is superior. Specifically, the EVA contains 18% VA by mass. With increasing VA content, the density, melt flow rate, elasticity, softness, compatibility, tensile strength, and elongation at break of EVA increase, while the tensile modulus and hardness decrease. Specifically, the foaming agent is used to induce gas generation during foaming and molding, increasing the elasticity of the foam layer. The crosslinking agent, also a cross-linking agent, is used to cross-link the foam layer. The stabilizer improves the light and thermal stability of the foam layer, preventing yellowing and migration. The addition of a release agent allows for rapid demolding of the product after foaming in the mold, ensuring product integrity during demolding. The addition of EVA color masterbatch provides the required color for product production.

[0027] Specifically, the modified TPE is formed by mixing and granulating TPE and TPU. TPE is a styrene-based thermoplastic elastomer, a copolymer of butadiene or isoprene and styrene by block polymerization, with butadiene or hydrogenated butadiene as the soft segment. TPU is a thermoplastic polyurethane elastomer, with diisocyanate and chain extender as the hard segment and long oligomeric polyol chains as the soft segment. TPE has a slower elastic recovery, while TPU has a faster elastic recovery. High-hardness TPE is prone to deformation during processing, while TPU has excellent elasticity, making the modified TPE less prone to deformation. In addition, TPE has a smoother feel than TPU. TPE has a medium-low hardness, making it superior in terms of touch and comfort, while TPU has a medium-high hardness, making it superior in terms of elasticity and strength. By mixing TPE with TPU, the hardness, softness, and resilience of the foam layer are kept within a suitable range, and the yellowing resistance, aging resistance, and abrasion resistance of the artificial leather can be improved.

[0028] In some embodiments, the modified TPE has a hardness of 30-40 A. The hardness of the TPE can be controlled by adjusting the styrene content and the degree of vinyl addition; a lower vinyl content results in a softer TPE, while a higher vinyl content results in a harder Tg. The TPU is polyester-type with a hardness of 80-85 A. The hardness of the TPU is mainly adjusted by regulating the ratio of diisocyanate to polyol. Combining the TPE and TPU, the hardness of the modified TPE is 60-75 A.

[0029] In some embodiments, the mass ratio of TPE to TPU is 2:(1 to 1.2). By limiting the content of TPE with medium to low hardness and the hardness of TPU with medium to high hardness, the modified TPU achieves a moderate softness and hardness, resulting in suitable hardness and resilience, and a better leather-like feel.

[0030] In some embodiments, the nano-activated calcium carbonate has a particle size of 4000-5000 mesh. As a filler, the nano-activated calcium carbonate fills the foam pores, making the foam layer denser, providing a supporting framework for the foam layer, and preventing the foam pores from collapsing and deforming.

[0031] In some embodiments, the foaming agent is an AC foaming agent with a fineness of 5-8 μm, a gas emission rate of 200-220 mL / g, and a decomposition temperature of 180-220 °C.

[0032] In some embodiments, the crosslinking agent is bis(tert-butylperoxyisopropylbenzene), abbreviated as BIPB, which can improve the crosslinking speed and crosslinking density. BIPB can be used in EVA foaming, and its crosslinking products include volatile gases such as methane, acetone, and tert-butanol, thus producing no irritating odor during operation or in the finished products.

[0033] In some embodiments, the stabilizer is one of potassium-zinc heat stabilizers, calcium-zinc stabilizers, and barium-zinc stabilizers. In this embodiment, a barium-zinc stabilizer composed of 4-10 parts barium sulfate and 0.2-0.8 parts zinc oxide is preferred. The barium-zinc stabilizer composed of the above components exhibits excellent thermal and light stability, low initial colorfastness, high transparency, good color stability, good dispersibility, and low bridging tendency.

[0034] In some embodiments, the release agent is stearic acid.

[0035] In some embodiments, the EVA surface layer, by weight, is composed of 70-80 parts EVA, 10-20 parts HDPE, 5-10 parts filler particles (PE filler masterbatch (50% calcium carbonate content)), and 3-5 parts color masterbatch. HDPE-modified EVA improves the cohesiveness and mechanical properties of EVA, resulting in a soft, high-strength, and resilient EVA surface layer.

[0036] In some embodiments, the base fabric may be a cotton-like fleece, suede, or terry cloth, and the basis weight of the base fabric is 70–200 gsm. Specifically, when the base fabric is a cotton-like fleece, its basis weight is 120–150 gsm; when the base fabric is suede, its basis weight is 130–200 gsm; and when the base fabric is terry cloth, its basis weight is 70–100 gsm.

[0037] In some embodiments, the EVA surface layer is further provided with a surface treatment layer formed of water-based PU. The EVA surface layer also contains fine and dense pores, and the surface treatment layer formed of water-based PU is provided on it to improve properties such as wear resistance, water resistance, chemical corrosion resistance, elasticity, and flexural strength, as well as to enhance the softness and fullness of the surface and improve gloss.

[0038] This invention also provides a method for preparing modified TPE artificial leather, comprising the following steps:

[0039] (1) TPE (hardness of 30-40A) and polyester TPU (hardness of 80-85A) are mixed in a mixer at a speed of 20-50 r / min for 30 min by mass ratio of 2: (1-1.2), and modified TPE is obtained by granulation using an extruder.

[0040] (2) By weight, 60-90 parts of EVA, 20-40 parts of modified TPE, 5-20 parts of nano-activated calcium carbonate, 4-8 parts of foaming agent, 0.2-1 parts of crosslinking agent, 4-10 parts of stabilizer, 0.4-0.5 parts of release agent and 1 part of EVA masterbatch are mixed and plasticized in an internal mixer for 20-30 minutes, then mixed and compounded in an open mill at a temperature of 80-100℃ for 5 minutes, and then extruded in an extruder at a temperature of 80-110℃ to obtain a mixture by forming it into sheets through a die.

[0041] (3) Place the mixture in a mold and heat it in a hydraulic foaming machine at a temperature of 180-215℃ for 30-45 minutes to produce a sheet.

[0042] (4) The sheet is welded by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material with a thickness of 1 to 1.5 mm.

[0043] (5) The first roll of material is laminated with a base fabric (the base fabric can be imitation cotton fleece (120-150gsm), suede (130-200gsm), terry cloth (70-100gsm), etc.) through a PUR laminating machine to obtain the second roll of material.

[0044] (6) The second roll of material is passed through a casting machine (temperatures of 185℃, 200℃, and 210℃, die temperature of 220℃, and casting speed of 8-15m / min) to achieve a bonding thickness of 0.09-0.15mm. It is then bonded to the EVA surface layer and embossed to obtain the third roll of material. The EVA surface layer is composed of 70-80 parts EVA, 10-20 parts HDPE, 5-10 parts filler particles, and 3-5 parts color masterbatch.

[0045] (7) Water-based PU is applied to the surface of the third roll of material (i.e. the surface of the EVA surface layer), and after being treated with 80 mesh and 100 mesh matting at a speed of 15 m / min and dried at a temperature of 120°C, a surface treatment layer is formed on the surface of the EVA surface layer to obtain the modified TPE artificial leather.

[0046] The manufacturing process of artificial leather is as follows: TPE is granulated and modified, then mixed and plasticized in an internal mixer, then mixed again in a two-roll mill, then extruded into sheets in an extruder, then foamed in a hydraulic foaming machine, then welded in a welding machine, then slitting in a continuous slitting machine, and finally laminated to a base fabric using a PUR hot melt adhesive laminating machine. Next, an EVA surface layer is laminated and embossed in a casting machine, and finally, a water-based surface treatment is performed to obtain the finished product. In the above-mentioned artificial leather, TPU is used to modify TPE, improving the hardness, resilience, aging resistance, and abrasion resistance of the modified TPE. The modified TPE and EVA are then foamed to form a foam layer, enhancing the overall performance of the foam layer. The soft, high-strength, and highly resilient EVA surface layer makes the artificial leather feel more realistic. Combined with a surface treatment layer, the corrosion resistance, stain resistance, and water resistance of the artificial leather are improved.

[0047] To further illustrate the artificial leather and its preparation method provided by the present invention, the following embodiments are provided.

[0048] Example 1

[0049] A type of artificial leather includes, from bottom to top, a base fabric, a modified TPE foam layer, an EVA top layer, and a surface treatment layer.

[0050] A method for preparing artificial leather includes the following steps:

[0051] (1) TPE (hardness of 30A) and polyester TPU (hardness of 85A) were mixed in a mixer at a speed of 35r / min for 30min at a mass ratio of 2:1, and then granulated using an extruder to obtain modified TPE with a hardness of 70A.

[0052] (2) By weight, 90 parts of EVA, 40 parts of modified TPE, 20 parts of nano-active calcium carbonate (particle size of 4000 mesh), 8 parts of AC foaming agent, 1 part of BIPB, 10 parts of barium sulfate, 0.8 parts of zinc oxide, 0.5 parts of stearic acid and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer for 30 minutes, then mixed and compounded in an open mill at a temperature of 90°C for 5 minutes, and finally placed in an extruder at a temperature of 100°C to form a sheet through a die to obtain the mixture.

[0053] (3) Place the mixture in a mold and heat it in a hydraulic foaming machine at a temperature of 180°C for 45 minutes to produce a sheet.

[0054] (4) The sheet is welded by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material with a thickness of 1.5 mm.

[0055] (5) The first roll of material is laminated with a base fabric (imitation cotton flannel) with a weight of 130gsm using a PUR laminating machine to obtain the second roll of material.

[0056] (6) The second roll of material is passed through a casting machine (temperatures of 185℃, 200℃, and 210℃, die temperature of 220℃, and casting speed of 10m / min) to achieve a bonding thickness of 0.10mm. It is then bonded to the EVA surface layer and embossed to obtain the third roll of material. The EVA surface layer is composed of 70 parts EVA, 10 parts HDPE, 5 parts filler particles, and 3 parts color masterbatch.

[0057] (7) Water-based PU is applied to the surface of the third roll of material (i.e. the surface of the EVA surface layer), and after being treated with 80 mesh and 100 mesh matting at a speed of 15 m / min and dried at a temperature of 120°C, a surface treatment layer is formed on the surface of the EVA surface layer to obtain the modified TPE artificial leather.

[0058] Example 2

[0059] A type of artificial leather includes, from bottom to top, a base fabric, a modified TPE foam layer, an EVA top layer, and a surface treatment layer.

[0060] A method for preparing artificial leather includes the following steps:

[0061] (1) TPE (hardness of 40A) and polyester TPU (hardness of 80A) were mixed in a mixer at a speed of 20r / min for 30min at a mass ratio of 2:1.2. The modified TPE with hardness of 65A was obtained by granulation using an extruder.

[0062] (2) By weight, 75 parts of EVA, 30 parts of modified TPE, 10 parts of nano-active calcium carbonate (particle size of 5000 mesh), 6 parts of AC foaming agent, 0.5 parts of BIPB, 6 parts of barium sulfate, 0.5 parts of zinc oxide, 0.5 parts of stearic acid and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer for 25 minutes, then mixed and compounded in an open mill at 100°C for 5 minutes, and finally placed in an extruder at 80°C to form sheets through a die to obtain the mixture.

[0063] (3) Place the mixture in a mold and heat it in a hydraulic foaming machine at a temperature of 215°C for 30 minutes to produce a sheet.

[0064] (4) The sheet is welded by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material with a thickness of 1.5 mm.

[0065] (5) The first roll of material is laminated with a base fabric (imitation cotton flannel) with a weight of 130gsm using a PUR laminating machine to obtain the second roll of material.

[0066] (6) The second roll of material is passed through a casting machine (temperatures of 185℃, 200℃, and 210℃, die temperature of 220℃, and casting speed of 10m / min) to achieve a bonding thickness of 0.10mm. It is then bonded to the EVA surface layer and embossed to obtain the third roll of material. The EVA surface layer is composed of 75 parts EVA, 15 parts HDPE, 7 parts filler particles, and 4 parts color masterbatch.

[0067] (7) Water-based PU is applied to the surface of the third roll of material (i.e. the surface of the EVA surface layer), and after being treated with 80 mesh and 100 mesh matting at a speed of 15 m / min and dried at a temperature of 120°C, a surface treatment layer is formed on the surface of the EVA surface layer to obtain the modified TPE artificial leather.

[0068] Example 3

[0069] A type of artificial leather includes, from bottom to top, a base fabric, a modified TPE foam layer, an EVA top layer, and a surface treatment layer.

[0070] A method for preparing artificial leather includes the following steps:

[0071] (1) TPE (hardness 35A) and polyester TPU (hardness 83A) were mixed in a mixer at a speed of 50r / min for 30min at a mass ratio of 2:1.1, and then granulated using an extruder to obtain modified TPE with a hardness of 60A.

[0072] (2) By weight, 60 parts of EVA, 20 parts of modified TPE, 5 parts of nano-activated calcium carbonate (4500 mesh), 4 parts of AC foaming agent, 0.2 parts of BIPB, 4 parts of barium sulfate, 0.2 parts of zinc oxide, 0.4 parts of stearic acid and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer for 20 minutes, then mixed and compounded in an open mill at 80°C for 5 minutes, and finally placed in an extruder at 110°C to form sheets through a die to obtain the mixture.

[0073] (3) Place the mixture in a mold and heat it in a hydraulic foaming machine at a temperature of 195°C for 40 minutes to produce a sheet.

[0074] (4) The sheet is welded by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material with a thickness of 1.5 mm.

[0075] (5) The first roll of material is laminated with a base fabric (imitation cotton flannel) with a weight of 130gsm using a PUR laminating machine to obtain the second roll of material.

[0076] (6) The second roll of material is passed through a casting machine (temperatures of 185℃, 200℃, and 210℃, die temperature of 220℃, and casting speed of 10m / min) to achieve a bonding thickness of 0.10mm. It is then bonded to the EVA surface layer and embossed to obtain the third roll of material. The EVA surface layer is composed of 80 parts EVA, 20 parts HDPE, 10 parts filler particles, and 5 parts color masterbatch.

[0077] (7) Water-based PU is applied to the surface of the third roll of material (i.e. the surface of the EVA surface layer), and after being treated with 80 mesh and 100 mesh matting at a speed of 15 m / min and dried at a temperature of 120°C, a surface treatment layer is formed on the surface of the EVA surface layer to obtain the modified TPE artificial leather.

[0078] Comparative Example 1

[0079] The preparation methods of Comparative Example 1 and Example 1 are basically the same, except that the TPE in Comparative Example 1 was not modified by TPU, that is, the TPE and EVA and other additives were directly mixed.

[0080] Comparative Example 2

[0081] The preparation methods of Comparative Example 2 and Example 1 are basically the same, except that the mass ratio of TPE to polyester TPU in Comparative Example 2 is 1:1.

[0082] Performance testing

[0083] The artificial leathers prepared in Examples 1-3 and Comparative Examples 1-2 were tested, and the results are as follows:

[0084] Test standards: tensile test, tear test, peel load are in accordance with GB / T 38612-2020 "Test Methods for Artificial Leather and Synthetic Leather - Determination of Tensile Load and Elongation at Break"; anti-aging test is in accordance with GB / T 16422.3-2014; abrasion fastness is in accordance with AATCC 8-2007.

[0085]

[0086] The data above shows that Comparative Example 1 did not use TPU to modify TPE, thus reducing its peel load. This means that TPU-modified TPE, when foamed, can increase the adhesion between the material and the base fabric, allowing the peel load to meet requirements. In Comparative Example 2, when the amount of TPU gradually increased to be comparable to that of TPE, the overall elasticity of the artificial leather material increased, as did the tensile load, making the overall material more rubbery and reducing the softness of leather.

[0087] In summary, this invention modifies TPE using TPU to improve its hardness, resilience, aging resistance, and abrasion resistance. The modified TPE and EVA are then foamed to create a foamed layer, further enhancing its overall performance. The soft, high-strength, and highly resilient EVA surface layer enhances the realistic feel of the artificial leather. Combined with a surface treatment layer, this improves the artificial leather's corrosion resistance, stain resistance, and water resistance.

[0088] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A modified TPE artificial leather, characterized in that, The product comprises, from bottom to top, a base fabric, a modified TPE foam layer, and an EVA surface layer; by weight, the modified TPE foam layer is composed of 60-90 parts EVA, 20-40 parts modified TPE, 5-20 parts nano-activated calcium carbonate, 4-8 parts foaming agent, 0.2-1 part crosslinking agent, 4-10 parts stabilizer, 0.4-0.5 parts release agent, and 1 part EVA color masterbatch; the modified TPE is formed by mixing and granulating TPE and TPU; the modified TPE... In E, the TPE has a hardness of 30-40A; the TPU is polyester type with a hardness of 80-85A; the modified TPE has a hardness of 60-75A; the mass ratio of TPE to TPU is 2:(1-1.2); by weight, the EVA surface layer is made of 70-80 parts EVA, 10-20 parts HDPE, 5-10 parts filler particles, and 3-5 parts color masterbatch; the EVA surface layer is also provided with a surface treatment layer formed of water-based PU.

2. The modified TPE artificial leather according to claim 1, characterized in that, The particle size of the nano-activated calcium carbonate is 4000-5000 mesh.

3. The modified TPE artificial leather according to claim 1, characterized in that, The foaming agent is AC foaming agent, with a fineness of 5-8 μm, a gas emission rate of 200-220 mL / g, and a decomposition temperature of 180-220℃.

4. The modified TPE artificial leather according to claim 1, characterized in that, The base fabric is made of imitation cotton fleece, suede, or terry cloth, and the weight of the base fabric is 70–200 gsm.

5. A method for preparing modified TPE artificial leather, characterized in that, Includes the following steps: TPE and TPU were mixed in a mixer with a speed of 20-50 r / min and then granulated to obtain modified TPE. 60-90 parts of EVA, 20-40 parts of modified TPE, 5-20 parts of nano-activated calcium carbonate, 4-8 parts of foaming agent, 0.2-1 part of crosslinking agent, 4-10 parts of stabilizer, 0.4-0.5 parts of release agent, and 1 part of EVA masterbatch are mixed and plasticized in an internal mixer, then mixed and compounded in an open mill, and finally extruded into sheets through a die to obtain the mixture. The mixture is placed in a mold and hot-pressed to foam, thus producing a sheet. The sheet material is welded together by a welding machine and then cut into sheets by a continuous slitting machine to obtain the first roll of material. The first roll of material is laminated to the base fabric using a PUR laminating machine to produce the second roll of material; The second roll of material is laminated with the EVA surface layer and embossed using a casting machine to produce the third roll of material; Water-based PU is applied to the surface of the third roll of material, which is then treated with 80-mesh and 100-mesh matte finishes and dried to obtain the modified TPE artificial leather as described in any one of claims 1-4.

6. The method for preparing modified TPE artificial leather according to claim 5, characterized in that, The temperature of the open mill is 80-100℃; the temperature of the extruder is 80-110℃; the hot-press foaming is specifically carried out in a hydraulic foaming machine at a temperature of 180-215℃ for 30-45 minutes; the temperature of the casting machine is 185℃, 200℃, and 210℃, the die head temperature is 220℃, and the casting speed is 8-15m / min.

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