阅读说明：本技术 一种热塑性弹性体鞋底材料及制备工艺 (Thermoplastic elastomer sole material and preparation process thereof ) 是由 杨国雷 于 2018-09-10 设计创作，主要内容包括：本发明公开了一种热塑性弹性体鞋底材料及制备工艺,配方包括：异戊橡胶(IR)、乙烯-乙酸乙烯共聚物、热塑性橡胶(TPR)、促进剂、硫化剂、稳定剂和发泡剂,各组分的质量百分含量分别是：异戊橡胶(IR)35-45％、乙烯-乙酸乙烯共聚物25-35％、塑性橡胶(TPR)18-25％、促进剂1.5-2％、硫化剂5-10％、稳定剂2-3％和发泡剂0.5-1％；包括一下步骤：步骤一,选材；步骤二,混合生胶；步骤三,炼化生胶；步骤四,炼制混炼胶；步骤五,硫化发泡；步骤六,检验；该材料,表面光泽性好,化学稳定性良好,抗老化和耐臭氧强度好,且防滑性能好,同时可缩短硫化时间或降低硫化温度,减少硫化剂用量及提高材料的物理机械性能,同时具有良好的热塑性和弹性。(The invention discloses a thermoplastic elastomer sole material and a preparation process thereof, wherein the formula comprises the following components: isoprene Rubber (IR), ethylene-vinyl acetate copolymer, thermoplastic rubber (TPR), accelerator, vulcanizing agent, stabilizer and foaming agent, wherein the mass percentages of the components are respectively as follows: 35-45% of Isoprene Rubber (IR), 25-35% of ethylene-vinyl acetate copolymer, 18-25% of plastic rubber (TPR), 1.5-2% of accelerator, 5-10% of vulcanizing agent, 2-3% of stabilizer and 0.5-1% of foaming agent; the method comprises the following steps: step one, selecting materials; step two, mixing raw rubber; step three, refining raw rubber; step four, refining the rubber compound; step five, vulcanizing and foaming; step six, checking; the material has good surface gloss, good chemical stability, good aging resistance and ozone resistance, good anti-skid property, and good thermoplasticity and elasticity, and can shorten the vulcanizing time or reduce the vulcanizing temperature, reduce the consumption of vulcanizing agent, improve the physical and mechanical properties of the material.)

1. A thermoplastic elastomer sole material, the formulation comprising: isoprene Rubber (IR), ethylene-vinyl acetate copolymer, thermoplastic rubber (TPR), accelerator, vulcanizing agent, stabilizer and foaming agent, wherein the mass percentages of the components are respectively as follows: 35-45% of Isoprene Rubber (IR), 25-35% of ethylene-vinyl acetate copolymer, 18-25% of plastic rubber (TPR), 1.5-2% of accelerator, 5-10% of vulcanizing agent, 2-3% of stabilizer and 0.5-1% of foaming agent.

2. A preparation process of a thermoplastic elastomer sole material comprises the steps of selecting materials; step two, mixing raw rubber; step three, refining raw rubber; step four, refining the rubber compound; step five, vulcanizing and foaming; step six, checking; the method is characterized in that:

in the first step, the components are as follows according to the mass percentage: 35-45% of Isoprene Rubber (IR), 25-35% of ethylene-vinyl acetate copolymer, 18-25% of plastic rubber (TPR), 1.5-2% of accelerator, 5-10% of vulcanizing agent, 2-3% of stabilizer and 0.5-1% of foaming agent, and weighing according to the sum of the weight percentages of 1;

in the second step, adding Isoprene Rubber (IR) and plastic rubber (TPR) into a high-speed mixer for fully mixing;

in the third step, adding the mixed raw rubber into a double-roller open mill, and fully plasticating to a wrapping roller;

in the fourth step, the refining of the rubber compound comprises the following steps:

1) adding the ethylene-vinyl acetate copolymer into the raw rubber plasticated in the third step, and fully refining;

2) adding an accelerator, a vulcanizing agent, a stabilizer and a foaming agent into the mixture, and uniformly mixing to obtain a rubber compound;

3) thinly passing the obtained kneaded product through a calender molding machine to obtain a sheet;

4) the rubber compound is placed in a normal temperature environment for molding;

in the fifth step, after the mixed rubber in the fourth step is molded, the mixed rubber is vulcanized and foamed through a flat vulcanizing machine to form a rubber foam body with an independent foam cell structure;

in the sixth step, whether the compound is completely vulcanized and foamed is checked, and the inferior products are optionally discarded or vulcanized and foamed again according to the situation.

3. A thermoplastic elastomer sole material as claimed in claim 1, wherein: the promoter is any one of a promoter D, a promoter DETU and a promoter CZ, and is preferably a promoter CZ (N-cyclohexyl-2-benzothiazole sulfonamide).

4. A thermoplastic elastomer sole material as claimed in claim 1, wherein: stirring alumina particles, monomethoxy polyethylene glycol and dichloromethane, adding hydroxypropyl methacrylate and ethylene oxide, continuously stirring, adding hydrochloric acid and a polymerization inhibitor, mixing, heating and stirring under the protection of nitrogen, standing, cooling and washing to obtain the alumina compound.

5. The process for preparing a thermoplastic elastomer sole material according to claim 2, wherein: the rotating speed of the high-speed mixer in the second step is 1300-1500rpm, and the mixing time is 6-10 min.

6. The process for preparing a thermoplastic elastomer sole material according to claim 2, wherein: and mixing the raw rubber in the third step for 15-20min at the temperature of 90-150 ℃.

7. The process for preparing a thermoplastic elastomer sole material according to claim 2, wherein: and in the fourth step, mixing the raw rubber and the ethylene-vinyl acetate copolymer for 8-10min at the temperature of 40-90 ℃.

8. The process for preparing a thermoplastic elastomer sole material according to claim 2, wherein: the mixing temperature in the fourth step is 130-150 ℃, and the mixing time is 5-8 min.

9. The process for preparing a thermoplastic elastomer sole material according to claim 2, wherein: and heating the mixed material in the step five at the temperature of 140-200 ℃ to vulcanize and foam for 25-30min, wherein the heating means can be steam or microwaves.

Technical Field

The invention relates to the technical field of shoemaking, in particular to a thermoplastic elastomer sole material and a preparation process thereof.

Background

With the rapid development of the global shoe industry, the main materials for producing the soles comprise rubber, PU, PVC, leather, TPR, TPU, EVA and the like, the rubber soles have the advantages of skid resistance, high elasticity, good wear resistance, difficult fracture, good extensibility, stable contraction and the like, various materials are full of precious porcelain, and the proportion of the usage amount of the various materials is respectively as follows: 30% of rubber, 28% of PVC, 6% of PU, 15% of TPR, 8% of leather, 7% of EVA and 6% of the rest. The PVC resin is a synthetic resin variety with the largest output in China, and can occupy a large proportion in the middle and low grade sole material market due to the characteristics of low price, simple and convenient processing and the like, but in recent years, due to the pressure on ecological environmental protection, the market share of PVC as the sole material begins to be gradually reduced, natural rubber is one of the commonly used sole materials, but the thermoplasticity and elasticity of the natural rubber are far from the requirements, and the anti-skid property is poor and the anti-aging is easy.

Disclosure of Invention

The invention aims to provide a thermoplastic elastomer sole material and a preparation process thereof, which aim to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a thermoplastic elastomer sole material, the formulation comprising: isoprene Rubber (IR), ethylene-vinyl acetate copolymer, thermoplastic rubber (TPR), accelerator, vulcanizing agent, stabilizer and foaming agent, wherein the mass percentages of the components are respectively as follows: 35-45% of Isoprene Rubber (IR), 25-35% of ethylene-vinyl acetate copolymer, 18-25% of plastic rubber (TPR), 1.5-2% of accelerator, 5-10% of vulcanizing agent, 2-3% of stabilizer and 0.5-1% of foaming agent.

A preparation process of a thermoplastic elastomer sole material comprises the steps of selecting materials; step two, mixing raw rubber; step three, refining raw rubber; step four, refining the rubber compound; step five, vulcanizing and foaming; step six, checking;

in the first step, the components are as follows according to the mass percentage: 35-45% of Isoprene Rubber (IR), 25-35% of ethylene-vinyl acetate copolymer, 18-25% of plastic rubber (TPR), 1.5-2% of accelerator, 5-10% of vulcanizing agent, 2-3% of stabilizer and 0.5-1% of foaming agent, and weighing according to the sum of the weight percentages of 1;

in the second step, adding Isoprene Rubber (IR) and plastic rubber (TPR) into a high-speed mixer for fully mixing;

in the third step, adding the mixed raw rubber into a double-roller open mill, and fully plasticating to a wrapping roller;

in the fourth step, the refining of the rubber compound comprises the following steps:

1) adding the ethylene-vinyl acetate copolymer into the raw rubber plasticated in the third step, and fully refining;

2) adding an accelerator, a vulcanizing agent, a stabilizer and a foaming agent into the mixture, and uniformly mixing to obtain a rubber compound;

3) thinly passing the obtained kneaded product through a calender molding machine to obtain a sheet;

4) the rubber compound is placed in a normal temperature environment for molding;

in the fifth step, after the mixed rubber in the fourth step is molded, the mixed rubber is vulcanized and foamed through a flat vulcanizing machine to form a rubber foam body with an independent foam cell structure;

in the sixth step, whether the compound is completely vulcanized and foamed is checked, and the inferior products are optionally discarded or vulcanized and foamed again according to the situation.

According to the technical scheme, the accelerator is any one of an accelerator D, an accelerator DETU and an accelerator CZ, and is preferably an accelerator CZ (N-cyclohexyl-2-benzothiazole sulfonamide).

According to the technical scheme, the vulcanizing agent is an alumina compound, alumina particles, monomethoxy polyethylene glycol and dichloromethane are stirred, hydroxypropyl methacrylate and ethylene oxide are added for continuous stirring, hydrochloric acid and a polymerization inhibitor are added for mixing, the mixture is heated and stirred under the protection of nitrogen, and the mixture is kept stand, cooled and washed to obtain the alumina compound.

According to the technical scheme, the rotating speed of the high-speed mixer in the second step is 1300-1500rpm, and the mixing time is 6-10 min.

According to the technical scheme, the raw rubber is mixed in the third step for 15-20min at the temperature of 90-150 ℃.

According to the technical scheme, the raw rubber and the ethylene-vinyl acetate copolymer are mixed in the fourth step and are mixed for 8-10min at the temperature of 40-90 ℃.

According to the technical scheme, the mixing temperature in the fourth step is 130-150 ℃, and the mixing time is 5-8 min.

According to the technical scheme, the mixture in the step five is heated at the temperature of 140-200 ℃ to be vulcanized and foamed for 25-30min, and the heating means can be steam or microwave.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, Isoprene Rubber (IR) and ethylene-vinyl acetate copolymer are combined for use, so that the material has good surface gloss, good chemical stability, good aging resistance and ozone resistance, greatly improved friction coefficient, greatly improved anti-skid property, shortened vulcanization time or reduced vulcanization temperature due to the use of the accelerator CZ (N-cyclohexyl-2-benzothiazole sulfenamide), reduced vulcanizing agent dosage, improved physical and mechanical properties, and good thermoplasticity and elasticity.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an overall flow diagram of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1, the present invention provides a technical solution: a thermoplastic elastomer sole material and a preparation process thereof,