阅读说明：本技术 一种质轻高耐磨的运动鞋鞋底材料及其制备方法 (Light-weight high-wear-resistance sports shoe sole material and preparation method thereof ) 是由 王建治 于 2020-12-15 设计创作，主要内容包括：本发明公开一种质轻高耐磨的运动鞋鞋底材料及其制备方法,涉及运动鞋技术领域。本发明公开的质轻高耐磨的运动鞋鞋底材料,采用聚乳酸和聚异丁烯在交联剂和活性剂的作用下,接枝交联生成PLS/PIB共混物,然后再与C5/C9共聚树脂、聚醚型热塑性聚氨酯弹性体、废胶粉等原料模压发泡制得的。本发明提供的运动鞋鞋底材料,原料环保,制备工艺简单易操作,密度低,高弹性,具有优异的抗冲击性、耐磨性、耐候性、耐腐蚀性和抗湿滑性,同时提高了材料的降解性能,降低了对环境的污染。(The invention discloses a light-weight high-wear-resistance sole material of sports shoes and a preparation method thereof, and relates to the technical field of sports shoes. The invention discloses a lightweight high-wear-resistance sports shoe sole material which is prepared by adopting polylactic acid and polyisobutylene to generate PLS/PIB blend through graft crosslinking under the action of a crosslinking agent and an activating agent, and then carrying out mould pressing and foaming on the PLS/PIB blend and raw materials such as C5/C9 copolymer resin, polyether type thermoplastic polyurethane elastomer, waste rubber powder and the like. The sole material for the sports shoes provided by the invention has the advantages of environment-friendly raw materials, simple and easily-operated preparation process, low density, high elasticity, excellent impact resistance, wear resistance, weather resistance, corrosion resistance and wet skid resistance, and simultaneously improves the degradation performance of the material and reduces the pollution to the environment.)

1. The sole material is characterized by being composed of the following materials in parts by weight: 50-80 parts of polylactic acid, 30-50 parts of polyisobutylene, 10-20 parts of C5/C9 copolymer resin, 15-30 parts of polyether type thermoplastic polyurethane elastomer, 5-10 parts of waste rubber powder, 3-8 parts of modified talcum powder, 3-5 parts of silica fume, 2-6 parts of silane coupling agent, 4-7 parts of foaming agent, 0.8-1.9 parts of cross-linking agent, 1-3 parts of active agent, 1-2.5 parts of vulcanizing agent and 0.5-1.5 parts of anti-aging agent.

2. The sole material for sports shoes with light weight and high wear resistance as claimed in claim 1, wherein said polyisobutylene is composed of low molecular weight polyisobutylene and high molecular weight polyisobutylene, and the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene is (2.5-4): 1.

3. the sole material of lightweight highly wear-resistant sports shoes as claimed in claim 2, wherein the number average molecular weight of said low molecular weight polyisobutylene is 7000-12000 and the number average molecular weight of said high molecular weight polyisobutylene is 90000-300000.

4. The lightweight highly abrasion resistant athletic shoe sole material of claim 1, wherein the polyether-type thermoplastic polyurethane elastomer is Elastollan1190A from Pasteur, Germany.

5. The sole material of lightweight high wear-resistant sneakers according to claim 1, wherein the modified talc powder is prepared by the following steps: adding alkyl phosphate carboxylate into ethanol for dilution, adding talcum powder, stirring for 1h at 80-100 ℃, filtering, and drying to obtain modified talcum powder, wherein the mass ratio of the alkyl phosphate carboxylate to the ethanol is 1:3, the mass ratio of the alkyl phosphate carboxylate to the talcum powder is (0.05-0.1):1, and the particle size of the talcum powder is 20-45 mu m.

6. The lightweight highly abrasion resistant athletic shoe sole material of claim 1, wherein the blowing agent is one of azodicarboxylate, p-toluenesulfonylhydrazide or azodicarboxamide and the crosslinking agent is dicumyl peroxide.

7. The lightweight, highly abrasion resistant athletic shoe sole material of claim 1, wherein the active agent is a combination of zinc oxide, zinc stearate, and diethylamine phosphate in a 2: 1: (0.5-0.8).

8. The sole material for lightweight high wear resistance sports shoes according to claim 1, wherein the vulcanizing agent is one of benzoyl peroxide or t-butyl peroxybenzoate, and the anti-aging agent is AW.

9. A method for preparing a sole material of a lightweight high wear-resistant sports shoe as claimed in any one of claims 1 to 8, which comprises the following steps:

(1) preparation of PLA/PIB blends: adding polylactic acid into a double-roll open mill, heating to 70-90 ℃, adding a cross-linking agent and an active agent, stirring for 0.5-1h, then adding polyisobutylene, stirring for 2h, discharging, and preparing a PLA/PIB blend;

(2) adding the PLA/PIB blend, the C5/C9 copolymer resin, the polyether thermoplastic polyurethane elastomer and the waste rubber powder into a double-roll open mill, uniformly mixing, heating to 40-60 ℃, mixing for 15min, heating to 80-90 ℃, then adding a vulcanizing agent, modified talcum powder, silica fume and a silane coupling agent, mixing for 30min, and discharging to obtain a mixture;

(3) adding a foaming agent and an anti-aging agent into the mixture after mixing, mixing for 3-5min at 80-90 ℃, discharging the sheet, then placing the obtained sheet on a flat-plate vulcanizing instrument, preheating for 8min at 170-180 ℃, and foaming under the condition of mould pressing of 8MPa to obtain the sole material.

Technical Field

The invention belongs to the technical field of sports shoes, and particularly relates to a light-weight high-wear-resistance sole material of a sports shoe and a preparation method thereof.

Background

With the rapid development of modern society, people have changed greatly the concept of wearing shoes from protection and heat preservation in the last century to the pursuit of functions such as lightness, comfort, beauty, shock absorption, wear resistance and the like. As the first major country of production and consumption of sports shoes in the world, China is also in a change day by day for research and development of the sports shoes. The existing sports shoe soles are divided into three categories, namely vulcanized rubber soles, air cushion filling soles and foaming soles, and with the continuous development of science and technology, the foaming soles have the advantages of excellent performance and low cost, so that the sports shoe soles have larger market share.

Currently, the bottom of the world's various brands of athletic shoes are mostly using foamed materials of EVA and its blends. The EVA and the blended foaming material thereof have light weight, warm keeping, comfort and low cost, but the prior EVA and the blended foaming material thereof have larger density and insufficient elasticity, the elasticity is 30 to 42 percent, the middle soles of basketball, running and other sports have the requirements of high elasticity (the rebound resilience is more than 50 percent), and the wear resistance and the slip resistance are poor, and the prior EVA foaming material can not meet the requirements. The foaming rubber is widely used due to lightness, softness and comfort, but once the traditional rubber is foamed, the wear resistance and the skid resistance of the traditional rubber are obviously reduced, and the width of the foaming rubber are greatly reduced.

With the improvement of environmental awareness of modern people, chemical materials are difficult to degrade and difficult to recycle, and cause great pollution to the environment. The existing sports shoe soles made of EVA materials, rubber materials, polyurethane materials and the like have stable performance and are difficult to degrade, and the added auxiliary agents are toxic or low-toxic, cause certain damage to human bodies, pollute the environment and are not beneficial to environmental protection. Therefore, under the condition of advocating green and environment-friendly and low-carbon life, the development of an environment-friendly foaming sole material with light weight, good elasticity, good wear resistance and good slip resistance becomes the main direction for the development and development of sports soles.

The Chinese invention patent CN201110044932.2 discloses an EVA material for sports shoe soles and a preparation method thereof, the EVA foaming material is modified by blending starch/ethylene-vinyl acetate copolymer/ethylene-a-olefin copolymer, the starch is applied to chemical plastics, the using amount of chemical raw materials is reduced, and simultaneously, the starch derivatives have the characteristic of natural degradation, the easy degradation performance of the EVA foaming material is improved, but the wear resistance of the material is poor, and the rebound rate is not more than 48%. The Chinese invention patent CN201010248174.1 discloses a high shock absorption and wear resistance sports shoe sole material and a manufacturing method thereof, which is prepared by screening rubber composition proportion, a coupling agent, an accelerant and an activator and reasonably controlling the process on the basis of rubber, softening oil and a reinforcing agent, has excellent shock absorption, wear resistance and wet skid resistance, but has higher density, general rebound resilience, difficult degradation and does not conform to the modern environmental protection concept.

Disclosure of Invention

The invention mainly aims to provide a sole material of sports shoes, which has the advantages of environment-friendly raw materials, simple and easily-operated preparation process, low density, high elasticity, excellent impact resistance, wear resistance, weather resistance, corrosion resistance and wet skid resistance, improved degradation performance of the material and reduced environmental pollution.

In order to achieve the purpose of the invention, the invention provides a light-weight and high-wear-resistance sports shoe sole material which is composed of the following materials in parts by weight: 50-80 parts of polylactic acid, 30-50 parts of polyisobutylene, 10-20 parts of C5/C9 copolymer resin, 15-30 parts of polyether type thermoplastic polyurethane elastomer, 5-10 parts of waste rubber powder, 3-8 parts of modified talcum powder, 3-5 parts of silica fume, 2-6 parts of silane coupling agent, 4-7 parts of foaming agent, 0.8-1.9 parts of cross-linking agent, 1-3 parts of active agent, 1-2.5 parts of vulcanizing agent and 0.5-1.5 parts of anti-aging agent.

Further, the polyisobutylene consists of low molecular weight polyisobutylene and high molecular weight polyisobutylene, and the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene is (2.5-4): 1.

further, the number average molecular weight of the low molecular weight polyisobutylene is 7000-12000, and the number average molecular weight of the high molecular weight polyisobutylene is 90000-300000.

Further, the polyether type thermoplastic polyurethane elastomer is Elastollan1190A of Pasteur, Germany.

Further, the preparation method of the modified talcum powder comprises the following steps: adding alkyl phosphate carboxylate into ethanol for dilution, adding talcum powder, stirring for 1h at 80-100 ℃, filtering, and drying to obtain modified talcum powder, wherein the mass ratio of the alkyl phosphate carboxylate to the ethanol is 1:3, the mass ratio of the alkyl phosphate carboxylate to the talcum powder is (0.05-0.1):1, and the particle size of the talcum powder is 20-45 mu m.

Further, the foaming agent is one of azodicarboxylate, p-toluenesulfonyl hydrazide or azodicarbonamide, and the crosslinking agent is dicumyl peroxide.

Further, the active agent is a composition of zinc oxide, zinc stearate and diethylamine phosphate, and the mass ratio of the zinc oxide to the zinc stearate to the diethylamine phosphate is 2: 1: (0.5-0.8).

Further, the vulcanizing agent is one of benzoyl peroxide or tert-butyl peroxybenzoate, and the anti-aging agent is an anti-aging agent AW.

The preparation method of the light-weight high-wear-resistance sports shoe sole material specifically comprises the following steps:

(1) preparation of PLA/PIB blends: adding polylactic acid into a double-roll open mill, heating to 70-90 ℃, adding a cross-linking agent and an active agent, stirring for 0.5-1h, then adding polyisobutylene, stirring for 2h, discharging, and preparing a PLA/PIB blend;

(2) adding the PLA/PIB blend, the C5/C9 copolymer resin, the polyether thermoplastic polyurethane elastomer and the waste rubber powder into a double-roll open mill, uniformly mixing, heating to 40-60 ℃, mixing for 15min, heating to 80-90 ℃, then adding a vulcanizing agent, modified talcum powder, silica fume and a silane coupling agent, mixing for 30min, and discharging to obtain a mixture;

(3) adding a foaming agent and an anti-aging agent into the mixture after mixing, mixing for 3-5min at 80-90 ℃, discharging the sheet, then placing the obtained sheet on a flat-plate vulcanizing instrument, preheating for 8min at 170-180 ℃, and foaming under the condition of mould pressing of 8MPa to obtain the sole material.

The invention achieves the following beneficial effects:

1. the invention is prepared by foaming polylactic acid which is a biodegradable polyester polymer and has good biocompatibility, hand feeling and heat resistance, so that the foaming material has certain antibacterial property, flame retardance and ultraviolet resistance, the degradation performance of the invention is improved, and the pollution to the environment is reduced.

2. The Polyisobutylene (PIB) is a colorless, tasteless and nontoxic viscous or semisolid polymer, and is blended, grafted and crosslinked with PLA under the action of a crosslinking agent and an activating agent, so that the melt strength of the PLA is improved, the foaming performance of the PLA is improved, and the obtained microcellular foaming material is large in cell density, high in expansion rate and uniform in emptying. The low molecular weight PIB enables a substance with adhesion to be easily adsorbed and gathered after being blended with PLA, thereby enlarging the aperture of the foam hole, reducing the density and improving the elongation at break, the tearing strength and the rebound resilience of the sole material; the adhesiveness of the low molecular weight PIB increases the overall frictional resistance of the entire sole material when in contact with the ground, thereby improving the wear resistance and slip resistance of the present invention. The addition of high molecular weight PIB improves the impact strength of the invention, which makes the invention have high toughness.

3. The addition of the C5/C9 copolymer resin improves the binding force among the components of the sole material, can increase the pore diameter of the cells, reduce the density, improve the acid and alkali resistance of the sole material, and further improve the wear resistance and the slip resistance of the sole material.

4. The polyether type thermoplastic polyurethane elastomer added in the invention has high strength, hydrolysis resistance, high resilience, and excellent wear resistance, solvent resistance and low temperature resistance, thereby improving the resilience, wear resistance, corrosion resistance and low temperature resistance of the invention.

5. The talcum powder modified by the alkyl phosphate carboxylate improves the compatibility with each component of a sole material, reduces the viscosity of a system, increases the fluidity of the system, improves the processing performance of the system, reduces the deformation and improves the dimensional stability of the invention. The modified talcum powder and the silicon powder have synergistic effect and can be used as a nucleating agent of the PLA/PIB blend to improve the foaming performance of the PLA/PIB blend, so that the foam density of the invention is higher and the foam distribution is more uniform.

6. The silicon powder has good mechanical property and high-temperature-resistant oxidation resistance, and is added into the sole material, so that the thermal stability of PLA is improved, the strength of the sole material is also improved, the wear rate of the material is reduced, and the flame retardance and the corrosion resistance are enhanced.

7. The waste rubber powder is wide in source and low in price, and is added into the sole material, so that the using amount of PLA is reduced, the cost is reduced, the waste resources are reasonably utilized, the energy is saved, the environment is protected, and the tensile strength, the elongation at break and the resilience of the sole material are improved.

8. According to the invention, polylactic acid and polyisobutylene are subjected to graft crosslinking to generate a PLS/PIB blend under the action of a crosslinking agent and an activator, and then are subjected to mould pressing foaming with raw materials such as C5/C9 copolymer resin, polyether type thermoplastic polyurethane elastomer, waste rubber powder and the like to obtain the lightweight high-wear-resistance sports shoe sole material which has excellent rebound resilience, impact resistance, wear resistance, weather resistance, corrosion resistance and wet skid resistance, so that the sports shoe is light, comfortable and wear-resistant, the service life of the sports shoe is prolonged, and the use effect of the sports shoe is ensured. The polylactic acid of the invention can be used for degrading biological materials, and other raw materials are nontoxic and easy to obtain, so that the prepared sole material is an environment-friendly material and accords with the modern energy-saving and environment-friendly concept.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The sole material for lightweight, highly wear-resistant sports shoes and the method for manufacturing the same according to the present invention will be described with reference to the following embodiments.

Example 1

A sole material of lightweight high-wear-resistance sports shoes is composed of the following materials in parts by weight: 50 parts of polylactic acid, 40 parts of polyisobutylene, 20 parts of C5/C9 copolymer resin, 30 parts of polyether type thermoplastic polyurethane elastomer, 10 parts of waste rubber powder, 8 parts of modified talcum powder, 3 parts of silica fume, 2 parts of silane coupling agent, 4 parts of foaming agent, 1.2 parts of crosslinking agent, 3 parts of activating agent, 1 part of vulcanizing agent and 1.5 parts of anti-aging agent. The preparation method of the sole material consisting of the materials comprises the following steps:

(1) preparation of PLA/PIB blends: adding polylactic acid into a double-roll open mill, heating to 70-90 ℃, adding a cross-linking agent and an active agent, stirring for 0.5-1h, then adding polyisobutylene, stirring for 2h, discharging, and preparing the PLA/PIB blend.

(2) Adding the PLA/PIB blend, the C5/C9 copolymer resin, the polyether thermoplastic polyurethane elastomer and the waste rubber powder into a double-roll open mill, uniformly mixing, heating to 40-60 ℃, mixing for 15min, heating to 80-90 ℃, then adding a vulcanizing agent, modified talcum powder, silica fume and a silane coupling agent, mixing for 30min, and discharging to obtain a mixture.

(3) Adding a foaming agent and an anti-aging agent into the mixture after mixing, mixing for 3-5min at 80-90 ℃, discharging the sheet, then placing the obtained sheet on a flat-plate vulcanizing instrument, preheating for 8min at 170-180 ℃, and foaming under the condition of mould pressing of 8MPa to obtain the sole material.

The polyisobutylene is composed of low molecular weight polyisobutylene and high molecular weight polyisobutylene, the number average molecular weight of the low molecular weight polyisobutylene is 7000-30000, and the number average molecular weight of the high molecular weight polyisobutylene is 90000-300000. Wherein the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene is 2.5: 1.

The polyether type thermoplastic polyurethane elastomer was Elastollan1190A from Pasteur, Germany.

The preparation method of the modified talcum powder comprises the following steps: adding alkyl phosphate carboxylate into ethanol for dilution, adding talcum powder, stirring for 1h at 80-100 ℃, filtering, and drying to obtain the modified talcum powder. Wherein the mass ratio of the alkyl phosphate carboxylate to the ethanol is 1:3, the mass ratio of the alkyl phosphate carboxylate to the talcum powder is 1:10, and the particle size of the talcum powder is 20-45 mu m.

The foaming agent is azodicarboxylate; the cross-linking agent is dicumyl peroxide; the vulcanizing agent is benzoyl peroxide; the anti-aging agent is anti-aging agent AW. The active agent is a composition of zinc oxide, zinc stearate and diethylamine phosphate, and the mass ratio of the zinc oxide to the zinc stearate to the diethylamine phosphate is 2: 1: 0.5.

example 2

A sole material of lightweight high-wear-resistance sports shoes is composed of the following materials in parts by weight: 80 parts of polylactic acid, 30 parts of polyisobutylene, 10 parts of C5/C9 copolymer resin, 20 parts of polyether type thermoplastic polyurethane elastomer, 10 parts of waste rubber powder, 3 parts of modified talcum powder, 5 parts of silica fume, 6 parts of silane coupling agent, 7 parts of foaming agent, 0.8 part of crosslinking agent, 1 part of activating agent, 2.5 parts of vulcanizing agent and 0.5 part of anti-aging agent. The preparation method of the sole material composed of the material is the same as that in example 1, and the specific reference is made to example 1.

The composition of the above polyisobutylene was the same as in example 1, except that the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene was 4: 1.

The polyether thermoplastic polyurethane elastomer, the crosslinking agent and the antioxidant are the same as those in example 1, and example 1 is specifically referred to.

The modified talc was prepared in the same manner as in example 1, except that the mass ratio of the alkylphosphoric acid carboxylate to talc was 1: 20.

The foaming agent is p-toluenesulfonyl hydrazide; the vulcanizing agent is tert-butyl peroxybenzoate; the active agent is a composition of zinc oxide, zinc stearate and diethylamine phosphate, wherein the mass ratio of the zinc oxide to the zinc stearate to the diethylamine phosphate is 2: 1: 0.8.

example 3

A sole material of lightweight high-wear-resistance sports shoes is composed of the following materials in parts by weight: 60 parts of polylactic acid, 50 parts of polyisobutylene, 15 parts of C5/C9 copolymer resin, 20 parts of polyether type thermoplastic polyurethane elastomer, 5 parts of waste rubber powder, 5 parts of modified talcum powder, 4 parts of silica fume, 3 parts of silane coupling agent, 5 parts of foaming agent, 1.9 parts of crosslinking agent, 2 parts of activating agent, 1.5 parts of vulcanizing agent and 1 part of anti-aging agent. The preparation method of the sole material composed of the material is the same as that in example 1, and the specific reference is made to example 1.

The composition of the above polyisobutylene was the same as in example 1, except that the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene was 3: 1.

The polyether thermoplastic polyurethane elastomer, the crosslinking agent and the antioxidant are the same as those in example 1, and example 1 is specifically referred to.

The modified talc was prepared in the same manner as in example 1, except that the mass ratio of the alkylphosphoric acid carboxylate to talc was 1: 16.

The foaming agent is azodicarbonamide; the vulcanizing agent is tert-butyl peroxybenzoate; the active agent is a composition of zinc oxide, zinc stearate and diethylamine phosphate, wherein the mass ratio of the zinc oxide to the zinc stearate to the diethylamine phosphate is 2: 1: 0.6.

example 4

A sole material of lightweight high-wear-resistance sports shoes is composed of the following materials in parts by weight: 70 parts of polylactic acid, 40 parts of polyisobutylene, 15 parts of C5/C9 copolymer resin, 15 parts of polyether type thermoplastic polyurethane elastomer, 10 parts of waste rubber powder, 6 parts of modified talcum powder, 4 parts of silica fume, 4 parts of silane coupling agent, 6 parts of foaming agent, 1.5 parts of crosslinking agent, 2 parts of activating agent, 1.8 parts of vulcanizing agent and 0.7 part of anti-aging agent. The preparation method of the sole material composed of the material is the same as that in example 1, and the specific reference is made to example 1.

The composition of the above polyisobutylene was the same as in example 1, except that the mass ratio of the low molecular weight polyisobutylene to the high molecular weight polyisobutylene was 3.2: 1.

The polyether thermoplastic polyurethane elastomer, the crosslinking agent and the antioxidant are the same as those in example 1, and example 1 is specifically referred to.

The modified talc was prepared in the same manner as in example 1, except that the mass ratio of the alkylphosphoric acid carboxylate to talc was 1: 15.

The foaming agent is azodicarboxylate; the vulcanizing agent is benzoyl peroxide; the active agent is a composition of zinc oxide, zinc stearate and diethylamine phosphate, wherein the mass ratio of the zinc oxide to the zinc stearate to the diethylamine phosphate is 2: 1: 0.7.

comparative example 1

A sole material for sports shoes, the raw materials and the preparation method thereof are the same as those in example 4, and the specific reference is made to example 4. Except that no polyisobutylene was added in this comparative example.

Comparative example 2

A sole material for sports shoes, the raw materials and the preparation method thereof are the same as those in example 4, and the specific reference is made to example 4. Except that the C5/C9 copolymer resin was not added to this comparative example.

Comparative example 3

A sole material for sports shoes, the raw materials and the preparation method thereof are the same as those in example 4, and the specific reference is made to example 4. Except that no polyether type thermoplastic polyurethane elastomer was added in this comparative example.

Comparative example 4

A sole material for sports shoes, the raw materials and the preparation method thereof are the same as those in example 4, and the specific reference is made to example 4. Except that no modified talc was added in this comparative example.

The sole materials of the sports shoes prepared in the above examples 1 to 4 and comparative examples 1 to 4 were compared and tested for their mechanical properties, and the test results are shown in table 1 below.

TABLE 1 detection results of mechanical properties of sole materials of sports shoes

As can be seen from the test results in Table 1, the sole material for sports shoes according to the present invention has high impact strength, elongation at break and right angle tear strength, and excellent toughness and impact resistance. After the polyisobutylene is added into the sole material, the tear strength and the toughness of the sole material are greatly enhanced; when the C5/C9 copolymer resin or polyether type thermoplastic polyurethane elastomer is added into the sole material, the strength and the toughness of the sole material are improved.

The abrasion resistance, hardness, density and rebound resilience of the pedal materials prepared in examples 1 to 4 and comparative examples 1 to 4 were measured by comparison, and the results are shown in Table 2 below.

Table 2 table of performance test results of sole material of sports shoes

As can be seen from the test results in Table 2, the sole material for athletic shoes according to the present invention is light in weight, low in hardness, and excellent in wear resistance and rebound resilience. After the polyisobutylene is added, the wear resistance and the rebound resilience of the composite material are greatly improved, and the density and the hardness are reduced; after the C5/C9 copolymer resin or the polyether thermoplastic polyurethane elastomer is added, the wear resistance and the rebound resilience of the rubber are improved, and the density of the rubber is reduced after the C5/C9 copolymer resin is added; when the modified talcum powder is added, the density of the invention is reduced.

The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.