CN117127416A - Modified TPE (thermoplastic elastomer) artificial leather and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of artificial leather and discloses modified TPE artificial leather and a preparation method thereof, wherein the modified TPE artificial leather comprises base cloth, a modified TPE foaming layer and an EVA surface layer; the modified TPE foaming layer is formed by foaming EVA, modified TPE, nano activated calcium carbonate, a foaming agent, a bridging agent, a stabilizer, a release agent and an EVA color masterbatch; the modified TPE is formed by mixing TPE and TPU and granulating. The preparation method comprises the steps of preparing modified TPE, hot-pressing foaming, welding, opening, bonding the base cloth by hot melt adhesive, laminating with EVA surface layer, and surface treatment. By modifying the TPE by adopting the TPU, the hardness, rebound resilience, ageing resistance, wear resistance and other properties of the modified TPE are improved, and then the modified TPE and the EVA are foamed to prepare a foaming layer, so that the comprehensive performance of the foaming layer is improved. The EVA surface layer with softness, high strength and good rebound resilience enables the hand feeling simulation degree of the artificial leather to be higher, and the surface treatment layer is used for assisting, so that the corrosion resistance, dirt resistance, water resistance and the like of the artificial leather are improved.

Description

Modified TPE artificial leather and preparation method thereof

Technical field

The present invention relates to the technical field of artificial leather and its preparation method, and in particular to a modified TPE artificial leather and its preparation method.

Background technique

Artificial leather is a plastic product that looks and feels like leather and can be used to replace animal leather to protect animals. It usually uses fabric as the base, coated with synthetic resin, plasticizers and other plastic additives, calendered and compounded Become. Among them, the current production process of domestic decorative artificial leather usually uses PVC resin powder, plasticizer, heavy calcium, stabilizer, foaming agent, color cake and other main raw materials. The artificial leather made from the above components has certain deterioration over time. With growth, artificial leather easily becomes hard and brittle, and the addition of plasticizers will also cause environmental pollution to artificial leather.

It can be seen that the existing technology still needs to be improved and improved.

Contents of the invention

In view of the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a modified TPE artificial leather that is not easy to age, has no pollution to the environment, is environmentally friendly, and has no plasticizer, and a preparation method thereof.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A modified TPE artificial leather, including a base fabric, a modified TPE foam layer, and an EVA surface layer arranged in sequence from bottom to top; calculated in parts by weight, the modified TPE foam layer consists of 60 to 90 parts of EVA, 20 parts ~40 parts modified TPE, 5~20 parts nano active calcium carbonate, 4~8 parts foaming agent, 0.2~1 part bridging agent, 4~10 parts stabilizer, 0.4~0.5 parts release agent, and 1 part EVA color masterbatch is foamed; the modified TPE is made by mixing and granulating TPE and TPU.

The modified TPE artificial leather, wherein in the modified TPE, the hardness of the TPE is 30-40A; the TPU is polyester type, the hardness is 80-85A; the hardness of the modified TPE is 60 ~75A.

In the modified TPE artificial leather, the mass ratio of the TPE and the TPU is 2: (1-1.2).

In the modified TPE artificial leather, the particle size of the nano-active calcium carbonate is 4000-5000 mesh.

In the modified TPE artificial leather, the foaming agent is an AC foaming agent with a fineness of 5 to 8 μm, a gas generation volume of 200 to 220 mL/g, and a decomposition temperature of 180 to 220°C.

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

In the modified TPE artificial leather, the base fabric is imitation cotton flannel, suede, or terry cloth, and the base fabric has a weight of 70 to 200 gsm.

In the modified TPE artificial leather, a surface treatment layer formed of water-based PU is also provided on the EVA surface layer.

A method for preparing modified TPE artificial leather, including the following steps:

Place TPE and TPU in proportion in a mixer at a speed of 20 to 50 r/min, stir and mix, and granulate to obtain modified TPE;

Mix 60 to 90 parts of EVA, 20 to 40 parts of modified TPE, 5 to 20 parts of nano activated calcium carbonate, 4 to 8 parts of foaming agent, 0.2 to 1 part of bridging agent, 4 to 10 parts of stabilizer, 0.4 to 0.5 1 part of release agent and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer, then mixed and mixed in an open mixer, and then placed in an extruder and formed into sheets through a die. Mixture;

The mixture is placed in a mold, hot-pressed and foamed to prepare a sheet;

The sheets are welded by a welding machine and opened by a continuous slicer to prepare the first roll;

The first roll of material is bonded to the base fabric through a PUR laminating machine to prepare the second roll of material;

The second roll material is bonded and embossed with the EVA surface layer through a casting machine to prepare the third roll material;

Water-based PU is used on the surface of the third roll, and after matting treatment of 80 mesh and 100 mesh, the modified TPE artificial leather as described in any one of claims 1 to 8 is obtained after drying.

The preparation method of the modified TPE artificial leather, wherein the temperature of the open mill is 80-100°C; the temperature of the extruder is 80-110°C; the hot-press foaming is performed at a temperature of In a hydraulic foaming machine at 180-215°C, heat for 30-45 minutes to foam; the temperature of the casting machine is 185°C, 200°C, 210°C, the die temperature is 220°C, and the casting speed is 8-15m /min.

Beneficial effects:

The invention provides a modified TPE artificial leather and a preparation method thereof. By using TPU to modify the TPE, the hardness, resilience, aging resistance, wear resistance and other properties of the modified TPE are improved, and then the modified TPE and EVA foaming produces a foam layer to improve the overall performance of the foam layer. The soft, high-strength, and resilient EVA surface layer makes the artificial leather feel more realistic, and is supplemented by a surface treatment layer to improve the corrosion resistance, dirt resistance, and water resistance of the artificial leather.

Detailed ways

The present invention provides a modified TPE artificial leather and a preparation method thereof. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the following examples are given to further describe the present invention in detail. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the scope of the present invention.

The invention provides a modified TPE artificial leather, which includes a base fabric, a modified TPE foam layer, and an EVA surface layer arranged in sequence from bottom to top; calculated in parts by weight, the modified TPE foam layer consists of 60 to 90 parts EVA, 20 to 40 parts of modified TPE, 5 to 20 parts of nano-activated calcium carbonate, 4 to 8 parts of foaming agent, 0.2 to 1 part of bridging agent, 4 to 10 parts of stabilizer, 0.4 to 0.5 parts of release agent, And 1 part of EVA color masterbatch is foamed. EVA is a rubber foam material made of ethylene-vinyl acetate copolymer. It has good chemical stability, aging resistance, water resistance, corrosion resistance, resilience, toughness, etc., supplemented by softness, conformability, and stronger gripping ability. That is, TPE with better anti-slip effect makes the overall performance of the foam layer better. Specifically, the mass content of VA in the EVA is 18%. As the VA content increases, the density, melt flow rate, elasticity, softness, compatibility, tensile strength, elongation at break and other properties of EVA will decrease. As it increases, the tensile modulus and hardness decrease. Specifically, the foaming agent is used to promote the generation of gas when the foaming layer is foamed and molded, and to increase the elasticity of the foaming layer. The bridging agent is also a cross-linking agent, which is used to cross-link and shape the foam layer. Stabilizers can improve the light stability and thermal stability of the foam layer and prevent yellowing and migration of the product. The addition of release agent allows the foamed product placed in the mold to be quickly demoulded, ensuring the integrity of the product when demolded. The addition of EVA masterbatch is used to provide the product with the color required for production.

Specifically, the modified TPE is obtained by mixing and granulating TPE and TPU. TPE is a styrenic thermoplastic elastomer, which is a copolymer of butadiene or isoprene and styrene block polymerization. The soft segment is butadiene or hydrogenated butadiene. TPU is a thermoplastic polyurethane elastomer. The hard segment of TPU is diisocyanate and chain extender, and the soft segment is long chain oligomer polyol. The elastic recovery ability of TPE is slow, and the elastic recovery ability of TPU is fast. The processing of high-hardness TPE can easily cause product deformation, while TPU has excellent elasticity, making the finished product made of modified TPE less likely to deform. In addition, the feel of TPE is more delicate than that of TPU. TPE has a medium-low hardness and is superior in touch and comfort. TPU has a medium-high hardness and is superior in elasticity and strength. By mixing TPU into TPE, the hardness, softness, resilience and other properties of the foam layer can be within an appropriate range, and the yellowing resistance, aging resistance and wear resistance of artificial leather can be improved.

In some embodiments, in the modified TPE, the hardness of the TPE is 30-40A. The hardness of TPE can be controlled by adjusting the styrene content and the degree of vinyl addition. A low vinyl content makes it soft, while a high vinyl content makes it hard and has a high Tg. The TPU is polyester type with a hardness of 80-85A. The hardness of TPU is mainly adjusted by adjusting the ratio of diisocyanate and polyol. After combining TPE and TPU, the hardness of the modified TPE is 60-75A.

In some embodiments, the mass ratio of the TPE and the TPU is 2: (1-1.2). By limiting the content of medium-low hardness TPE and the hardness of medium-high hardness TPU, the modified TPU is moderately soft and hard, achieving appropriate hardness and resilience, and a better leather simulation feel.

In some embodiments, the particle size of the nano-activated calcium carbonate is 4000-5000 mesh. Nano-activated calcium carbonate is used as a filler to fill the foaming pores, making the foaming layer dense, providing a supporting skeleton for the foaming layer, and preventing the cells in the foaming layer from collapse and deformation.

In some embodiments, the foaming agent is an AC foaming agent with a fineness of 5 to 8 μm, a gas generation volume of 200 to 220 mL/g, and a decomposition temperature of 180 to 220°C.

In some embodiments, the bridging agent is bis-tert-butyl cumene peroxide, or BIPB for short, which can increase the bridging speed and cross-linking density. BIPB can be used for EVA foaming, and its cross-linked products include volatile gases such as methane, acetone, tert-butyl alcohol, etc., so there is no irritating odor during the operation process and in the finished products.

In some embodiments, the stabilizer is one of a potassium zinc heat stabilizer, a calcium zinc stabilizer, and a barium zinc stabilizer. In this embodiment, a barium zinc stabilizer composed of 4 to 10 parts of barium sulfate and 0.2 to 0.8 parts of zinc oxide is preferred. The barium-zinc stabilizer composed of the above components has excellent thermal and light stability, low initial coloration, high transparency, good color stability, good dispersion, and small tendency to bridge.

In some embodiments, the release agent is stearic acid.

In some embodiments, calculated in parts by weight, the EVA surface layer consists of 70 to 80 parts of EVA, 10 to 20 parts of HDPE, 5 to 10 parts of filler particles (PE filled masterbatch (calcium carbonate content 50%)), and Made from 3 to 5 parts of color masterbatch. HDPE is used to modify EVA to improve the cohesion and mechanical properties of EVA, making the EVA surface layer soft, strong and resilient.

In some embodiments, the base fabric can be cotton-like velvet, suede, or terry fabric, and the base fabric has a weight of 70 to 200 gsm. Specifically, when the base fabric is cotton-like velvet, its grammage is 120-150gsm; when the base fabric is suede, its grammage is 130-200gsm; when the base fabric is terry cloth, its grammage is 70～100gsm.

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 small and dense cells, and a surface treatment layer made of water-based PU is set on it to improve wear resistance, water resistance, chemical corrosion resistance, elasticity, flex resistance and other properties, and improve the surface Soft, plump feel, to enhance gloss, etc.

The invention also provides a method for preparing modified TPE artificial leather, which includes the following steps:

(1) Place TPE (hardness 30~40A) and polyester TPU (hardness 80~85A) in a mixer with a mass ratio of 2: (1~1.2) at a speed of 20~50r/min. Mix at medium for 30 minutes, and use an extrusion granulator to granulate to prepare modified TPE.

(2) Calculated in parts by weight, add 60 to 90 parts of EVA, 20 to 40 parts of modified TPE, 5 to 20 parts of nano active calcium carbonate, 4 to 8 parts of foaming agent, 0.2 to 1 part of bridging agent, 4 to 10 parts of stabilizer, 0.4 to 0.5 parts of release agent, and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer for 20 to 30 minutes, and then placed in an open mixer at a temperature of 80 to 100°C for mixing and mixing. Glue for 5 minutes, then place it in an extruder with a temperature of 80 to 110°C, and pass the die into a sheet to prepare the mixture.

(3) Place the mixture in a mold, heat and foam it in a hydraulic foaming machine at a temperature of 180 to 215°C for 30 to 45 minutes to prepare a sheet.

(4) The sheets are welded by a welding machine and opened by a continuous opening machine to obtain a first roll with a thickness of 1 to 1.5 mm.

(5) Pass the first roll of material to the base fabric through a PUR laminating machine (the base fabric can be imitation cotton flannel (120~150gsm), suede (130~200gsm), terry cloth (70~100gsm), etc.) , to prepare the second roll material.

(6) Pass the second roll material through the casting machine (temperature is 185°C, 200°C, 210°C, die temperature is 220°C, casting speed is 8~15m/min), and the laminating thickness is 0.09~0.15mm , bonded and embossed with the EVA surface layer to prepare the third roll material. The EVA surface layer is made of 70 to 80 parts of EVA, 10 to 20 parts of HDPE, 5 to 10 parts of filler particles, and 3 to 5 parts of color masterbatch.

(7) Use water-based PU on the surface of the third roll (i.e., the surface of the EVA surface layer). After matting treatment of 80 mesh and 100 mesh, the water-based PU is dried at a speed of 15m/min at a temperature of 120°C. Finally, a surface treatment layer is formed on the surface of the EVA surface layer to prepare the modified TPE artificial leather.

That is, the preparation process of artificial leather is: after TPE is granulated and modified, it is mixed and plasticized in an internal mixer, then mixed in an open mill, and finally formed into sheets in an extruder, and then hydraulically foamed It is foamed by machine, welded by a welding machine, opened by a continuous opening machine, and bonded to the base fabric by a PUR hot melt adhesive laminating machine. Then the EVA surface layer is embossed in a casting machine, and finally the finished product is processed through water-based surface treatment. In the above-mentioned artificial leather, TPE is modified with TPU to improve the hardness, resilience, aging resistance, wear resistance and other properties of the modified TPE, and then the modified TPE and EVA are foamed to form a foaming layer to improve the foaming overall performance of the layer. The soft, high-strength, and resilient EVA surface layer makes the artificial leather feel more realistic, and is supplemented by a surface treatment layer to improve the corrosion resistance, dirt resistance, and water resistance of the artificial leather.

In order to further illustrate the artificial leather and its preparation method provided by the present invention, the following examples are provided.

Example 1

An artificial leather includes a base fabric, a modified TPE foam layer, an EVA surface layer, and a surface treatment layer arranged in sequence from bottom to top.

A method for preparing artificial leather, including the following steps:

(1) Mix TPE (hardness 30A) and polyester TPU (hardness 85A) in a mixer with a mass ratio of 2:1 for 30 minutes at a speed of 35r/min, and use extrusion granulation. Modified TPE with a hardness of 70A was prepared by machine granulation.

(2) Calculated in parts by weight, add 90 parts of EVA, 40 parts of modified TPE, 20 parts of nano-activated calcium carbonate (particle size is 4000 mesh), 8 parts of AC foaming agent, 1 part of BIPB, 10 parts of barium sulfate, 0.8 Put 0.5 parts of zinc oxide, 0.5 parts of stearic acid, and 1 part of EVA color masterbatch in an internal mixer to mix and plasticize for 30 minutes, then place them in an open mixer with a temperature of 90°C for 5 minutes, and then place them at a temperature of 90°C. In an extruder at 100°C, the mixture is formed into sheets through a die.

(3) Place the mixture in a mold, heat and foam it in a hydraulic foaming machine at a temperature of 180°C for 45 minutes to prepare a sheet.

(4) The sheets are welded by a welding machine and opened by a continuous slicer to obtain a first roll with a thickness of 1.5mm.

(5) Laminate the first roll of material to a base fabric (imitation cotton flannel cloth) with a weight of 130gsm through a PUR laminating machine to prepare the second roll of material.

(6) Pass the second roll of material through the casting machine (temperature is 185°C, 200°C, 210°C, die temperature is 220°C, casting speed is 10m/min), the lamination thickness is 0.10mm, and the EVA surface is The layers are bonded and embossed to prepare the third roll material. The EVA surface layer is made of 70 parts EVA, 10 parts HDPE, 5 parts filler particles, and 3 parts color masterbatch.

(7) Use water-based PU on the surface of the third roll (i.e., the surface of the EVA surface layer). After matting treatment of 80 mesh and 100 mesh, the water-based PU is dried at a speed of 15m/min at a temperature of 120°C. Finally, a surface treatment layer is formed on the surface of the EVA surface layer to prepare the modified TPE artificial leather.

Example 2

An artificial leather includes a base fabric, a modified TPE foam layer, an EVA surface layer, and a surface treatment layer arranged in sequence from bottom to top.

A method for preparing artificial leather, including the following steps:

(1) Place TPE (hardness 40A) and polyester TPU (hardness 80A) in a mixer with a mass ratio of 2:1.2 and stir for 30 minutes at a speed of 20r/min. Use extrusion granulation. Modified TPE with a hardness of 65A was prepared by machine granulation.

(2) In terms of parts by weight, 75 parts of EVA, 30 parts of modified TPE, 10 parts of nano-activated calcium carbonate (particle size is 5000 mesh), 6 parts of AC foaming agent, 0.5 parts of BIPB, 6 parts of barium sulfate, 0.5 0.5 parts of zinc oxide, 0.5 parts of stearic acid, and 1 part of EVA color masterbatch were mixed and plasticized in an internal mixer for 25 minutes, then placed in an open mixer at a temperature of 100°C for 5 minutes, and then placed at a temperature of 100°C. In an extruder at 80°C, the mixture is formed into sheets through a die.

(3) Place the mixture in a mold, heat and foam it in a hydraulic foaming machine at a temperature of 215°C for 30 minutes to prepare a sheet.

(4) The sheets are welded by a welding machine and opened by a continuous slicer to obtain a first roll with a thickness of 1.5mm.

(5) Laminate the first roll of material to a base fabric (imitation cotton flannel cloth) with a weight of 130gsm through a PUR laminating machine to prepare the second roll of material.

(6) Pass the second roll of material through the casting machine (temperature is 185°C, 200°C, 210°C, die temperature is 220°C, casting speed is 10m/min), the lamination thickness is 0.10mm, and the EVA surface is The layers are bonded and embossed to prepare the third roll material. The EVA surface layer is made of 75 parts EVA, 15 parts HDPE, 7 parts filler particles, and 4 parts masterbatch.

(7) Use water-based PU on the surface of the third roll (i.e., the surface of the EVA surface layer). After matting treatment of 80 mesh and 100 mesh, the water-based PU is dried at a speed of 15m/min at a temperature of 120°C. Finally, a surface treatment layer is formed on the surface of the EVA surface layer to prepare the modified TPE artificial leather.

Example 3

An artificial leather includes a base fabric, a modified TPE foam layer, an EVA surface layer, and a surface treatment layer arranged in sequence from bottom to top.

A method for preparing artificial leather, including the following steps:

(1) Place TPE (hardness 35A) and polyester TPU (hardness 83A) in a mixer with a mass ratio of 2:1.1 and stir for 30 minutes at a speed of 50r/min. Use extrusion granulation. Modified TPE with a hardness of 60A was prepared by machine granulation.

(2) Calculated in parts by weight, add 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, and 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 placed in an open mixer at a temperature of 80°C for mixing and mixing for 5 minutes, and then placed at a temperature of 110°C In the extruder, the mixture is made into sheets through the die head.

(3) Place the mixture in a mold, heat and foam it in a hydraulic foaming machine at a temperature of 195°C for 40 minutes to prepare a sheet.

(4) The sheets are welded by a welding machine and opened by a continuous slicer to obtain a first roll with a thickness of 1.5mm.

(5) Laminate the first roll of material to a base fabric (imitation cotton flannel cloth) with a weight of 130gsm through a PUR laminating machine to prepare the second roll of material.

(6) Pass the second roll of material through the casting machine (temperature is 185°C, 200°C, 210°C, die temperature is 220°C, casting speed is 10m/min), the lamination thickness is 0.10mm, and the EVA surface is The layers are bonded and embossed to prepare the third roll material. The EVA surface layer is made of 80 parts EVA, 20 parts HDPE, 10 parts filler particles, and 5 parts masterbatch.

(7) Use water-based PU on the surface of the third roll (i.e., the surface of the EVA surface layer). After matting treatment of 80 mesh and 100 mesh, the water-based PU is dried at a speed of 15m/min at a temperature of 120°C. Finally, a surface treatment layer is formed on the surface of the EVA surface layer to prepare the modified TPE artificial leather.

Comparative example 1

The preparation methods of Comparative Example 1 and Example 1 are basically the same, except that the TPE of Comparative Example 1 has not been modified by TPU, that is, TPE, EVA, and other additives are directly mixed.

Comparative example 2

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

Performance testing

The artificial leather prepared in Examples 1-3 and Comparative Examples 1-2 was tested, and the results are as follows:

Test standards: Tensile test, tear test and 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"; the anti-aging test is in accordance with GB/T 16422.3-2014 standard ; The color fastness to abrasion is in accordance with AATCC 8-2007 standards.

From the above data, it can be seen that Comparative Example 1 did not use TPU to modify the TPE, so that its peeling load was reduced. That is to say, the TPE modified by TPU and then foamed can increase the bonding performance between the material and the base fabric and make the peeling easier. The load meets the requirements. In Comparative Example 2, when the added amount of TPU gradually increases to be equivalent to that of TPE, the elasticity of the overall artificial leather material will increase, and the tensile load will also increase, thus making the overall material more rubbery and reducing the softness of the leather.

In summary, the present invention uses TPU to modify TPE to improve the hardness, resilience, aging resistance, wear resistance and other properties of the modified TPE, and then foams the modified TPE and EVA to obtain a foaming layer , improve the comprehensive performance of the foaming layer. The soft, high-strength, and resilient EVA surface layer makes the artificial leather feel more realistic, and is supplemented by a surface treatment layer to improve the corrosion resistance, dirt resistance, and water resistance of the artificial leather.

It can be understood that, for those of ordinary skill in the art, equivalent substitutions or changes can be made based on the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims (10)

1. A modified TPE artificial leather, characterized in that it includes a base fabric, a modified TPE foam layer, and an EVA surface layer arranged in sequence from bottom to top; calculated in parts by weight, the modified TPE foam layer consists of 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 bridging agent, 4-10 parts of stabilizer, 0.4-0.5 parts of decontamination agent It is foamed with molding agent and 1 part EVA color masterbatch; the modified TPE is made by mixing TPE and TPU for granulation. 2. The modified TPE artificial leather according to claim 1, characterized in that, in the modified TPE, the hardness of the TPE is 30-40A; the TPU is polyester type, and the hardness is 80-85A; The hardness of the modified TPE is 60-75A. 3. The modified TPE artificial leather according to claim 2, characterized in that the mass ratio of the TPE and the TPU is 2: (1-1.2). 4. The modified TPE artificial leather according to claim 1, characterized in that the particle size of the nano-active calcium carbonate is 4000-5000 mesh. 5. The modified TPE artificial leather according to claim 1, characterized in that the foaming agent is an AC foaming agent with a fineness of 5 to 8 μm, a gas generation volume of 200 to 220 mL/g, and a decomposition temperature of 180 ~220℃. 6. The modified TPE artificial leather according to claim 1, wherein the EVA surface layer consists of 70 to 80 parts of EVA, 10 to 20 parts of HDPE, 5 to 10 parts of filler particles, and 3 parts by weight. ~5 parts of color masterbatch. 7. The modified TPE artificial leather according to claim 1, wherein the base fabric is imitation cotton flannel, suede, or terry cloth, and the base fabric has a weight of 70 to 200 gsm. 8. The modified TPE artificial leather according to claim 1, characterized in that the EVA surface layer is further provided with a surface treatment layer formed of water-based PU. 9. A method for preparing modified TPE artificial leather, which is characterized by comprising the following steps: Place TPE and TPU in proportion in a mixer at a speed of 20 to 50 r/min, stir and mix, and granulate to obtain modified TPE; Mix 60 to 90 parts of EVA, 20 to 40 parts of modified TPE, 5 to 20 parts of nano activated calcium carbonate, 4 to 8 parts of foaming agent, 0.2 to 1 part of bridging agent, 4 to 10 parts of stabilizer, 0.4 to 0.5 1 part of release agent and 1 part of EVA color masterbatch are mixed and plasticized in an internal mixer, then mixed and mixed in an open mixer, and then placed in an extruder and formed into sheets through a die. Mixture; The mixture is placed in a mold, hot-pressed and foamed to prepare a sheet; The sheets are welded by a welding machine and opened by a continuous slicer to prepare the first roll; The first roll of material is bonded to the base fabric through a PUR laminating machine to prepare the second roll of material; The second roll material is bonded and embossed with the EVA surface layer through a casting machine to prepare the third roll material; Water-based PU is used on the surface of the third roll, and after matting treatment of 80 mesh and 100 mesh, the modified TPE artificial leather as described in any one of claims 1 to 8 is obtained after drying. 10. The preparation method of modified TPE artificial leather according to claim 9, characterized in that the temperature of the open mill is 80-100°C; the temperature of the extruder is 80-110°C; and the heat Pressure foaming specifically involves heating for 30 to 45 minutes in a hydraulic foaming machine with a temperature of 180 to 215°C; the temperatures of the casting machine are 185°C, 200°C, and 210°C, and the die temperature is 220°C. , the casting speed is 8~15m/min.