TPU (thermoplastic polyurethane) modified PVC (polyvinyl chloride) foaming material, artificial leather and preparation method of artificial leather

Abstract

The invention relates to the technical field of PVC (polyvinyl chloride) foaming materials, in particular to a TPU (thermoplastic polyurethane) modified PVC foaming material, artificial leather and a preparation method of the artificial leather. The TPU modified PVC foaming material comprises the following raw materials in parts by weight: 35-45 parts of TPU, 80-85 parts of PVC, 8-12 parts of epoxidized soybean oil, 7-11 parts of an additive based on a stable function, 4-6 parts of a modified zirconium silicate agent, 3-5 parts of a silane coupling agent KH560, 2-5 parts of a foaming agent, 2-3 parts of a heat stabilizer and 1-3 parts of an antioxidant. According to the foaming material, TPU and PVC are adopted as base materials, the epoxidized soybean oil, the foaming agent, the heat stabilizer and the antioxidant are added to serve as functional auxiliaries, meanwhile, the additive based on the stability-resistant function and the modified zirconium silicate agent are added to serve as blending materials, and the prepared foaming material is excellent in abrasion resistance, heat conduction and rebound resilience through blending, cooperation and common synergism of the raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC foaming materials, and particularly relates to a TPU-modified PVC foaming material, artificial leather and a preparation method thereof. Background Art

[0002] Artificial leather is a material made by artificially simulating the structure and properties of natural leather, with a fabric as the base and coated with synthetic resins and various plastic additives thereon. According to the production process and material characteristics, artificial leather can be classified into various types such as polyvinyl chloride (PVC) artificial leather, polyurethane (PU) artificial leather, etc. Among them, PVC artificial leather has a lower cost and is widely used; PU artificial leather has properties closer to natural leather and has better softness, breathability and wear resistance.

[0003] Existing artificial leather products have poor wear resistance, and at the same time, the heat conduction and resilience of the products are poor. It is difficult to coordinately improve the performance of the products, and the weather resistance and heat stability of the products are poor, which limits the use efficiency of the products. Based on this, the present invention provides a TPU-modified PVC foaming material, artificial leather and a preparation method thereof. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a TPU-modified PVC foaming material, artificial leather and a preparation method thereof to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems: The present invention provides a TPU-modified PVC foaming material, comprising the following raw materials in parts by weight: 35-45 parts of TPU, 80-85 parts of PVC, 8-12 parts of epoxidized soybean oil, 7-11 parts of an additive based on heat and stability functions, 4-6 parts of a modified zirconium silicate agent, 3-5 parts of a silane coupling agent KH560, 2-5 parts of a foaming agent, 2-3 parts of a heat stabilizer, and 1-3 parts of an antioxidant.

[0006] Preferably, the heat stabilizer is calcium stearate; the antioxidant is antioxidant 1010; the foaming agent is an AC foaming agent; the degree of polymerization of the PVC is 1000-1100; the Shore hardness of the TPU is 75A.

[0007] Preferably, the preparation method of the additive based on heat and stability functions is: S01: Add 2-4 parts of cerium dioxide, 1-2 parts of a silane coupling agent KH550 and 3-5 parts of aluminum nitride to 5-8 parts of a sodium dodecylbenzenesulfonate solution according to parts by weight, stir evenly to obtain a compounded liquid; Preheat the silicon carbide whiskers at 55 - 60°C for 1 h to obtain preheated silicon carbide whiskers; add the preheated silicon carbide whiskers to the compounding liquid according to a weight ratio of 3:5, and stir thoroughly to obtain an additive modification liquid. S02: Blend 3 - 5 parts of silicon powder, 2 - 4 parts of mullite powder, and 1 - 3 parts of yttrium oxide by weight, and perform a co - sintering treatment at a sintering temperature of 200 - 250°C for 1 h to obtain a sintered body. S03: Mix the sintered body and the additive modification liquid according to a weight ratio of 5:3, perform a ball - milling treatment at a ball - milling speed of 1000 r / min for 2 h. After the ball - milling is completed, perform suction filtration and drying to obtain an additive based on the heat - resistant and stable function.

[0008] Preferably, the mass fraction of the sodium dodecylbenzenesulfonate solution is 5 - 8%.

[0009] Preferably, the preparation method of the modified zirconium silicate agent is as follows: S101: Stir zirconium silicate evenly in a sufficient amount of potassium permanganate solution, then wash with water, perform suction filtration, and dry to obtain dry zirconium silicate; place the dry zirconium silicate in a proton irradiation chamber for irradiation for 1 h, with an irradiation power of 350 - 400 W. After the irradiation is completed, obtain the irradiated zirconium silicate agent. S102: Stir and modify the irradiated zirconium silicate agent and the treatment liquid according to a weight ratio of 3:(5 - 7). After the stirring is completed, perform suction filtration and drying to obtain the modified zirconium silicate agent.

[0010] Preferably, the stirring temperature for the stirring modification treatment is 55 - 60°C, the stirring speed is 450 - 500 r / min, and the stirring time is 1 h.

[0011] Preferably, the preparation method of the treatment liquid is as follows: Add 4 - 6 parts of nano - montmorillonite and 2 - 3 parts of calcium titanate by weight to 5 - 8 parts of sodium hexametaphosphate solution, then add 2 - 3 parts of wood cellulose and 1 - 2 parts of lanthanum oxide, and stir thoroughly to obtain the treatment liquid.

[0012] Preferably, the mass fraction of the sodium hexametaphosphate solution is 3 - 5%.

[0013] The present invention also provides a preparation method of artificial leather, using a TPU - modified PVC foaming material, which is specifically made by the following steps: Step 1: Weigh the raw materials of the TPU - modified PVC foaming material according to parts by weight, mix the raw materials evenly, and then perform a kneading treatment at a kneading temperature of 145°C for 2 - 5 min, and then extrude at 175°C to obtain the TPU - modified PVC foaming material. Step 2: The TPU-modified PVC foaming material is calendered by a calender to form a foaming layer with a thickness of 0.2 mm. The foaming layer is then laminated with a base fabric layer with a thickness of 0.8 mm and a lamination pressure of 29 kg / cm 2 , and then cooled to obtain a semi-finished product; Step 3: The semi-finished product is re-foamed at a foaming temperature of 205 - 210 °C for 2 - 5 minutes, and finally cooled and wound up, and that's it.

[0014] The present invention also provides an artificial leather prepared by the preparation method of the artificial leather.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The foaming material of the artificial leather of the present invention uses TPU and PVC as matrix materials, and by adding epoxy soybean oil, foaming agent, heat stabilizer and antioxidant as functional auxiliaries, and at the same time adding additives based on heat and stability functions and modified zirconium silicate agent as blending materials, through the blending and coordination of raw materials, working together synergistically, the prepared foaming material has excellent abrasion resistance, thermal conductivity and resilience. The performance of the product is significantly improved in coordination, and the weather resistance and heat stability of the product are remarkable; The additive based on heat and stability functions is made by mixing and ball milling a sintered body and an added modified liquid. The sintered body is made by sintering and improving silicon powder, mullite powder and yttrium oxide. At the same time, the silicon carbide whiskers are preheated and then blended and optimized with a compounding liquid. The cerium dioxide and silane coupling agent KH550 in the compounding liquid are blended with raw materials such as aluminum nitride and sodium dodecylbenzenesulfonate solution. Cerium dioxide and aluminum nitride are formulated into the whisker system. Through the whisker-like whisker structure, cerium dioxide and aluminum nitride filling systems are carried, and at the same time, combined with the sintered body, the sintered body of silicon powder, mullite and yttrium oxide better strengthens the system structure, thereby further optimizing the performance effect of the product and enhancing the performance coordination and performance stability of the product; The modified zirconium silicate agent is made by irradiating zirconium silicate with potassium permanganate solution and proton irradiation to stimulate its active efficacy, and then stirring and improving it with a treatment liquid. The nano-montmorillonite and calcium titanate in the treatment liquid are used as the matrix, and the layered nano-montmorillonite cooperates with the calcium titanate structure to play a strengthening effect. Calcium titanate belongs to the cubic crystal system and can form a three-dimensional network structure. In the system, the performance stability of the system is enhanced. At the same time, wood cellulose and lanthanum oxide are blended, and a sodium hexametaphosphate solution is used to disperse the raw material system structure. Through the co-allocation and co-assistance of raw materials, the zirconium silicate treated with the treatment liquid can further synergistically effect the system structure, thereby further improving the performance of the product. Detailed implementation mode

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] A TPU modified PVC foam material of this embodiment includes the following raw materials in parts by weight: TPU 35-45 parts, PVC 80-85 parts, epoxidized soybean oil 8-12 parts, additives based on stability function 7-11 parts, modified zirconium silicate agent 4-6 parts, silane coupling agent KH560 3-5 parts, foaming agent 2-5 parts, heat stabilizer 2-3 parts, antioxidant 1-3 parts.

[0018] The heat stabilizer in this embodiment is calcium stearate; the antioxidant is antioxidant 1010; the foaming agent is AC foaming agent; the polymerization degree of the PVC is 1000-1100; and the Shore hardness of the TPU is 75A.

[0019] The preparation method of the additive based on the stability function of this embodiment is: S01: Add 2-4 parts of cerium dioxide, 1-2 parts of silane coupling agent KH550 and 3-5 parts of aluminum nitride to 5-8 parts of sodium dodecylbenzene sulfonate solution by weight, stir evenly, and obtain a compounding solution; Preheating the silicon carbide whisker at 55-60° C. for 1 hour to obtain preheated silicon carbide whisker; adding the preheated silicon carbide whisker to the compounding solution at a weight ratio of 3:5, stirring sufficiently, and obtaining an added modified solution; S02: 3-5 parts of silicon powder, 2-4 parts of mullite powder and 1-3 parts of yttrium oxide are mixed and sintered at a sintering temperature of 200-250° C. for 1 hour to obtain a sintered body; S03: The sintered body and the modified liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain an additive based on the stability function.

[0020] The mass fraction of the sodium dodecylbenzenesulfonate solution of the present embodiment is 5-8%.

[0021] The preparation method of the modified zirconium silicate agent of this embodiment is: S101: stirring zirconium silicate in a sufficient amount of potassium permanganate solution, then washing with water, filtering and drying to obtain dry zirconium silicate; placing the dry zirconium silicate in a proton irradiation box for 1 hour at an irradiation power of 350-400W, and obtaining an irradiated zirconium silicate agent after the irradiation is completed; S102: Stir and modify the irradiated zirconium silicate agent and the treatment liquid in a weight ratio of 3:(5 - 7). After stirring, perform suction filtration and drying to obtain the modified zirconium silicate agent.

[0022] In this embodiment, the stirring temperature for the stirring and modification treatment is 55 - 60 °C, the stirring speed is 450 - 500 r / min, and the stirring is carried out for 1 h.

[0023] The preparation method of the treatment liquid in this embodiment is as follows: Weigh 4 - 6 parts of nano - montmorillonite and 2 - 3 parts of calcium titanate by weight and add them to 5 - 8 parts of sodium hexametaphosphate solution. Then add 2 - 3 parts of lignocellulose and 1 - 2 parts of lanthanum oxide, and stir thoroughly to obtain the treatment liquid.

[0024] The mass fraction of the sodium hexametaphosphate solution in this embodiment is 3 - 5%.

[0025] A preparation method of artificial leather in this embodiment uses TPU - modified PVC foaming material, and is specifically made by the following steps: Step 1: Weigh the raw materials of the TPU - modified PVC foaming material according to weight parts, mix the raw materials evenly, and then perform internal mixing treatment. The internal mixing temperature is 145 °C, and the internal mixing is carried out for 2 - 5 min. Then extrude at 175 °C to obtain the TPU - modified PVC foaming material; Step 2: Roll the TPU - modified PVC foaming material through a calender to form a foaming layer. The thickness of the foaming layer is 0.2 mm. Then the foaming layer is laminated with a base fabric layer. The thickness of the base fabric layer is 0.8 mm, and the lamination pressure is 29 kg / cm 2 , and then cool to obtain a semi - finished product; Step 3: Re - foam the semi - finished product. The foaming temperature is 205 - 210 °C, and the foaming is carried out for 2 - 5 min. Finally, cool and wind up to complete.

[0026] Artificial leather prepared by the preparation method of artificial leather in this embodiment.

[0027] Example 1: A TPU - modified PVC foaming material, including the following raw materials in weight parts: 35 parts of TPU, 80 parts of PVC, 8 parts of epoxidized soybean oil, 7 parts of additives based on heat and stability functions, 4 parts of modified zirconium silicate agent, 3 parts of silane coupling agent KH560, 2 parts of foaming agent, 2 parts of heat stabilizer, 1 part of antioxidant.

[0028] The heat stabilizer in this embodiment is calcium stearate; the antioxidant is antioxidant 1010; the foaming agent is AC foaming agent; the degree of polymerization of the PVC is 1000; the Shore hardness of the TPU is 75A.

[0029] The preparation method of the additives based on heat and stability functions in this embodiment is as follows: S01: Add 2 parts of cerium dioxide, 1 part of silane coupling agent KH550 and 3 parts of aluminum nitride to 5 parts of sodium dodecylbenzene sulfonate solution by weight, stir evenly to obtain a compounding solution; Preheating the silicon carbide whisker at 55° C. for 1 hour to obtain preheated silicon carbide whisker; adding the preheated silicon carbide whisker to the compounding solution at a weight ratio of 3:5, stirring sufficiently, and obtaining an added modified solution; S02: 3 parts of silicon powder, 2 parts of mullite powder and 1 part of yttrium oxide are mixed and sintered at a weight of 200° C. for 1 hour to obtain a sintered body; S03: The sintered body and the modified liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain an additive based on the stability function.

[0030] The mass fraction of the sodium dodecylbenzenesulfonate solution of the present embodiment is 5%.

[0031] The preparation method of the modified zirconium silicate agent of this embodiment is: S101: stirring zirconium silicate in a sufficient amount of potassium permanganate solution, then washing, filtering and drying to obtain dry zirconium silicate; placing the dry zirconium silicate in a proton irradiation box for 1 hour, the irradiation power is 350W, and after the irradiation is completed, an irradiated zirconium silicate agent is obtained; S102: The irradiated zirconium silicate agent and the treatment liquid are stirred and modified in a weight ratio of 3:5. After the stirring is completed, the mixture is filtered and dried to obtain a modified zirconium silicate agent.

[0032] The stirring temperature of the stirring modification treatment in this embodiment is 55° C., the stirring speed is 450 r / min, and the stirring is performed for 1 hour.

[0033] The preparation method of the treatment solution of this embodiment is: 4 parts of nano-montmorillonite and 2 parts of calcium titanate were added to 5 parts of sodium hexametaphosphate solution by weight, and then 2 parts of wood cellulose and 1 part of lanthanum oxide were added, and stirred thoroughly to obtain a treated solution.

[0034] The mass fraction of the sodium hexametaphosphate solution in this embodiment is 3%.

[0035] The method for preparing an artificial leather of the present embodiment adopts TPU modified PVC foam material, which is specifically prepared by the following steps: Step 1: weigh TPU modified PVC foam material raw materials according to weight parts, mix the raw materials, and then perform banburying treatment at a banburying temperature of 145° C. for 2 minutes, and then extrude at 175° C. to obtain TPU modified PVC foam material; Step 2: The TPU modified PVC foam material is calendered by a calender to obtain a foam layer with a thickness of 0.2 mm. The foam layer is then laminated with the base fabric layer with a thickness of 0.8 mm and a laminating pressure of 29 kg / cm 2 , followed by cooling to obtain a semi-finished product; Step 3: Foam the semi-finished product again at a temperature of 205°C for 2 minutes, and finally cool and roll it up.

[0036] The artificial leather is prepared by a method for preparing artificial leather in this embodiment.

[0037] Embodiment 2: A TPU modified PVC foam material, comprising the following raw materials in parts by weight: 45 parts of TPU, 85 parts of PVC, 12 parts of epoxidized soybean oil, 11 parts of additives based on stability function, 6 parts of modified zirconium silicate agent, 5 parts of silane coupling agent KH560, 5 parts of foaming agent, 3 parts of heat stabilizer, and 3 parts of antioxidant.

[0038] The heat stabilizer of this embodiment is calcium stearate; the antioxidant is antioxidant 1010; the foaming agent is AC foaming agent; the polymerization degree of the PVC is 1100; and the Shore hardness of the TPU is 75A.

[0039] The preparation method of the additive based on the stability function of this embodiment is: S01: Add 4 parts of cerium dioxide, 2 parts of silane coupling agent KH550 and 5 parts of aluminum nitride to 8 parts of sodium dodecylbenzene sulfonate solution by weight, stir evenly, and obtain a compounding solution; Preheating the silicon carbide whisker at 60° C. for 1 hour to obtain preheated silicon carbide whisker; adding the preheated silicon carbide whisker to the compounding solution at a weight ratio of 3:5, stirring sufficiently, and obtaining an added modified solution; S02: 5 parts of silicon powder, 4 parts of mullite powder and 3 parts of yttrium oxide are mixed and sintered at a weight ratio of 250° C. for 1 hour to obtain a sintered body; S03: The sintered body and the modified liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain an additive based on the stability function.

[0040] The mass fraction of the sodium dodecylbenzenesulfonate solution of the present embodiment is 8%.

[0041] The preparation method of the modified zirconium silicate agent of this embodiment is: S101: stirring zirconium silicate in a sufficient amount of potassium permanganate solution, then washing, filtering and drying to obtain dry zirconium silicate; placing the dry zirconium silicate in a proton irradiation box for 1 hour at an irradiation power of 400 W, and obtaining an irradiated zirconium silicate agent after the irradiation is completed; S102: Stir and modify the irradiated zirconium silicate agent and the treatment liquid according to a weight ratio of 3:7. After stirring ends, perform suction filtration and drying to obtain the modified zirconium silicate agent.

[0042] In this embodiment, the stirring temperature for the stirring and modification treatment is 60°C, the stirring speed is 500 r / min, and the stirring time is 1 h.

[0043] The preparation method of the treatment liquid in this embodiment is as follows: Add 6 parts of nano-montmorillonite and 3 parts of calcium titanate by weight to 8 parts of sodium hexametaphosphate solution, then add 3 parts of wood cellulose and 2 parts of lanthanum oxide, and stir thoroughly to obtain the treatment liquid.

[0044] The mass fraction of the sodium hexametaphosphate solution in this embodiment is 5%.

[0045] A preparation method of artificial leather in this embodiment uses a TPU-modified PVC foaming material, and is specifically made by the following steps: Step 1: Weigh the raw materials of the TPU-modified PVC foaming material according to weight parts, mix the raw materials evenly, then perform kneading treatment at a kneading temperature of 145°C for 5 min, and then extrude at 175°C to obtain the TPU-modified PVC foaming material; Step 2: Roll the TPU-modified PVC foaming material through a calender to form a foaming layer with a thickness of 0.2 mm. Then, the foaming layer is laminated with a base fabric layer with a thickness of 0.8 mm and a lamination pressure of 29 kg / cm 2 , and then cool to obtain a semi-finished product; Step 3: Re-foam the semi-finished product at a foaming temperature of 210°C for 5 min, and finally cool and wind up to complete.

[0046] The artificial leather prepared by the preparation method of artificial leather in this embodiment.

[0047] Example 3: A TPU-modified PVC foaming material, including the following raw materials by weight parts: 40 parts of TPU, 82.5 parts of PVC, 10 parts of epoxidized soybean oil, 9 parts of additives based on heat and stability functions, 5 parts of modified zirconium silicate agent, 4 parts of silane coupling agent KH560, 3.5 parts of foaming agent, 2.5 parts of heat stabilizer, 2 parts of antioxidant.

[0048] The heat stabilizer in this embodiment is calcium stearate; the antioxidant is antioxidant 1010; the foaming agent is AC foaming agent; the degree of polymerization of PVC is 1100; the Shore hardness of the TPU is 75A.

[0049] The preparation method of the additives based on heat and stability functions in this embodiment is as follows: S01: Add 3 parts of cerium dioxide, 1.5 parts of silane coupling agent KH550 and 4 parts of aluminum nitride to 6.5 parts of sodium dodecylbenzene sulfonate solution by weight, stir evenly, and obtain a compounding solution; Preheating the silicon carbide whisker at 57° C. for 1 hour to obtain preheated silicon carbide whisker; adding the preheated silicon carbide whisker to the compounding solution at a weight ratio of 3:5, stirring sufficiently, and obtaining an added modified solution; S02: 4 parts of silicon powder, 3 parts of mullite powder and 2 parts of yttrium oxide are mixed and sintered at a weight ratio of 225° C. for 1 hour to obtain a sintered body; S03: The sintered body and the modified liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000 r / min for 2 h. After the ball milling is completed, the mixture is filtered and dried to obtain an additive based on the stability function.

[0050] The mass fraction of the sodium dodecylbenzenesulfonate solution of the present embodiment is 6.5%.

[0051] The preparation method of the modified zirconium silicate agent of this embodiment is: S101: stirring zirconium silicate in a sufficient amount of potassium permanganate solution, then washing, filtering and drying to obtain dry zirconium silicate; placing the dry zirconium silicate in a proton irradiation box for 1 hour, the irradiation power is 375W, and after the irradiation is completed, an irradiated zirconium silicate agent is obtained; S102: The irradiated zirconium silicate agent and the treatment liquid are stirred and modified in a weight ratio of 3:6. After the stirring is completed, the mixture is filtered and dried to obtain a modified zirconium silicate agent.

[0052] The stirring temperature of the stirring modification treatment in this embodiment is 57.5° C., the stirring speed is 475 r / min, and the stirring is performed for 1 hour.

[0053] The preparation method of the treatment solution of this embodiment is: 5 parts of nano-montmorillonite and 2.5 parts of calcium titanate were added to 6.5 parts of sodium hexametaphosphate solution by weight, and then 2.5 parts of lignocellulose and 1.5 parts of lanthanum oxide were added, and stirred thoroughly to obtain a treated solution.

[0054] The mass fraction of the sodium hexametaphosphate solution in this embodiment is 4%.

[0055] The method for preparing an artificial leather of the present embodiment adopts TPU modified PVC foam material, which is specifically prepared by the following steps: Step 1: Weigh the TPU modified PVC foam material raw materials according to weight parts, mix the raw materials, and then perform banburying treatment at a banburying temperature of 145° C. for 3.5 minutes, and then extrude at 175° C. to obtain a TPU modified PVC foam material; Step 2: The TPU-modified PVC foaming material is calendered by a calender to obtain a foaming layer with a thickness of 0.2 mm. The foaming layer is then laminated with a base fabric layer with a thickness of 0.8 mm and a lamination pressure of 29 kg / cm 2 , and then cooled to obtain a semi-finished product; Step 3: The semi-finished product is re-foamed at a foaming temperature of 207 °C for 3.5 min, and finally cooled and wound up, and that's it.

[0056] The artificial leather prepared by the preparation method of an artificial leather in this embodiment.

[0057] Comparative Example 1: It is different from Example 3 in that the additive based on the heat resistance function is not added.

[0058] Comparative Example 2: It is different from Example 3 in that the sintered body is not added in the preparation of the additive based on the heat resistance function.

[0059] Comparative Example 3: It is different from Example 3 in that silicon powder and mullite powder are not added to the sintered body.

[0060] Comparative Example 4: It is different from Example 3 in that the additive modification liquid is not added in the preparation of the additive based on the heat resistance function.

[0061] Comparative Example 5: It is different from Example 3 in that preheated silicon carbide whiskers are not added to the additive modification liquid.

[0062] Comparative Example 6: It is different from Example 3 in that the compounding liquid is not added to the additive modification liquid.

[0063] Comparative Example 7: It is different from Example 3 in that cerium dioxide and aluminum nitride are not added to the compounding liquid.

[0064] Comparative Example 8: It is different from Example 3 in that the modified zirconium silicate agent is not added.

[0065] Comparative Example 9: It is different from Example 3 in that the modified zirconium silicate agent is not treated with the treatment liquid.

[0066] Comparative Example 10: It is different from Example 3 in that nano-montmorillonite and calcium titanate are not added to the treatment liquid.

[0067] Comparative Example 11: It is different from Example 3 in that lignocellulose and lanthanum oxide are not added to the treatment liquid.

[0068] The artificial leather products of Examples 1-3 and Comparative Examples 1-11 were tested for abrasion resistance, thermal conductivity, and resilience. The performance test results are shown in Table 1.

[0069] Table 1 Performance test results of the artificial leather products of Examples 1-3 and Comparative Examples 1-11:

[0070] It can be concluded from Examples 1-3 and Comparative Examples 1-11 that the artificial leather product of Example 3 of the present invention can have a maximum thermal conductivity of 0.98 W / m·K, a resilience rate of 44%, and a wear loss as low as 48 mm 3 , and the abrasion resistance, thermal conductivity, and resilience of the product can be improved in a coordinated manner.

[0071] The artificial leather products of Examples 1-3 and Comparative Examples 1-11 were tested for abrasion resistance, thermal conductivity, and resilience under weather and heat resistance conditions. Under weather and heat resistance conditions, the products were placed at 65 °C for 12 h, and then irradiated at an ultraviolet intensity of 200 W / m 2 for 12 h. The above is one cycle, and the cycle is repeated 10 times. The performance test results are shown in Table 2.

[0072] Table 2 Performance test results of the artificial leather products of Examples 1-3 and Comparative Examples 1-11 under weather and heat resistance conditions:

[0073] It can be seen from Comparative Examples 1-11 and Example 3 that the artificial leather product of Example 3 still has excellent performance stability under weather and heat resistance conditions. At the same time, when neither an additive based on the stability function nor a modified zirconium silicate agent is added to the product, the performance of the product shows an obvious downward trend. When the two are used in a coordinated manner, the performance effect of the product is the most significant; When the sintered body is not added in the preparation of the additive based on the stability function, the silicon powder and mullite powder are not added to the sintered body, the additive modification liquid is not added in the preparation of the additive based on the stability function, the preheated silicon carbide whiskers are not added to the additive modification liquid, the compounding liquid is not added to the additive modification liquid, and cerium dioxide and aluminum nitride are not added to the compounding liquid, the performance of the product shows a downward trend to varying degrees. When the additive based on the stability function prepared by combining the additive modification liquid obtained by the specific method of the present invention with the sintered body is used, the performance effect of the product is the most significant, and the use of different preparation methods in the preparation of the additive modification liquid is not as effective as the technical solution of the present invention.

[0074] When the modified zirconium silicate agent is not treated with the treatment liquid, nano-montmorillonite and calcium titanate are not added to the treatment liquid, lignocellulose and lanthanum oxide are not added to the treatment liquid, the performance of the product shows a deteriorating trend to varying degrees. The treatment liquid obtained by the specific method of the present invention and the specific modified zirconium silicate agent have the most significant performance effects. Replacing them with other methods is not as obvious as the effect of the present invention.

[0075] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0076] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A TPU modified PVC foam material, characterized in that: It includes the following raw materials in parts by weight: TPU 35-45 parts, PVC 80-85 parts, epoxidized soybean oil 8-12 parts, additives based on stability function 7-11 parts, modified zirconium silicate agent 4-6 parts, silane coupling agent KH560 3-5 parts, foaming agent 2-5 parts, heat stabilizer 2-3 parts, antioxidant 1-3 parts; The preparation method of the additive based on the stability function is: S01: Add 2-4 parts of cerium dioxide, 1-2 parts of silane coupling agent KH550 and 3-5 parts of aluminum nitride to 5-8 parts of sodium dodecylbenzene sulfonate solution by weight, stir evenly, and obtain a compounding solution; preheating the silicon carbide whisker at 55-60° C. for 1 hour to obtain preheated silicon carbide whisker; Add the preheated silicon carbide whiskers to the compounding solution at a weight ratio of 3:5, stir thoroughly, and obtain an added modified solution; S02: 3-5 parts of silicon powder, 2-4 parts of mullite powder and 1-3 parts of yttrium oxide are mixed and sintered at a sintering temperature of 200-250° C. for 1 hour to obtain a sintered body; S03: The sintered body and the modified liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain an additive based on the stability function.

2. A TPU modified PVC foam material according to claim 1, characterized in that: The heat stabilizer is calcium stearate; the antioxidant is antioxidant 1010; and the foaming agent is AC foaming agent.

3. A TPU modified PVC foam material according to claim 1, characterized in that: The polymerization degree of the PVC is 1000-1100; the Shore hardness of the TPU is 75A.

4. A TPU modified PVC foam material according to claim 1, characterized in that: The mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

5. The TPU modified PVC foam material according to claim 1, characterized in that: The preparation method of the modified zirconium silicate agent is: S101: stirring zirconium silicate in a sufficient amount of potassium permanganate solution, then washing with water, filtering and drying to obtain dry zirconium silicate; placing the dry zirconium silicate in a proton irradiation box for 1 hour at an irradiation power of 350-400W, and obtaining an irradiated zirconium silicate agent after the irradiation is completed; S102: The irradiated zirconium silicate agent and the treatment liquid are stirred and modified in a weight ratio of 3:(5-7). After the stirring is completed, the mixture is filtered and dried to obtain a modified zirconium silicate agent.

6. The TPU modified PVC foam material according to claim 5, characterized in that: The stirring temperature of the stirring modification treatment is 55-60° C., the stirring speed is 450-500 r / min, and the stirring is performed for 1 hour.

7. The TPU modified PVC foam material according to claim 5, characterized in that: The preparation method of the treatment solution is: 4-6 parts of nano-montmorillonite and 2-3 parts of calcium titanate are added to 5-8 parts of sodium hexametaphosphate solution by weight, and then 2-3 parts of lignocellulose and 1-2 parts of lanthanum oxide are added, and stirred thoroughly to obtain a treated solution.

8. The TPU modified PVC foam material according to claim 7, characterized in that: The mass fraction of the sodium hexametaphosphate solution is 3-5%.

9. A method for preparing artificial leather, characterized in that: The TPU modified PVC foam material as claimed in claim 1 is specifically prepared by the following steps: Step 1: Weigh the TPU modified PVC foam material raw materials according to weight, mix the raw materials, and then perform banburying treatment at a banburying temperature of 145° C. for 2-5 minutes, and then extrude at 175° C. to obtain a TPU modified PVC foam material; Step 2: The TPU modified PVC foam material is calendered by a calender to obtain a foam layer with a thickness of 0.2 mm. The foam layer is then laminated with the base fabric layer with a thickness of 0.8 mm and a laminating pressure of 29 kg / cm 2 , followed by cooling to obtain a semi-finished product; Step 3: Foam the semi-finished product again at a temperature of 205-210°C for 2-5 minutes, and finally cool and roll it up.

10. Artificial leather prepared by the method for preparing artificial leather according to claim 9.

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