阅读说明：本技术 一种透气鞋底及其生产工艺 (Breathable sole and production process thereof ) 是由 钱晓杰 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种透气鞋底及其生产工艺,透气鞋底包括如下重量份的组分：天然橡胶 35-45份；三元乙丙橡胶 20-25份；乙烯基硅橡胶 35-45份；相容剂 4-7份；硫化剂 1.5-3份；促进剂 1-1.5份；填料 40-60份；发泡剂H 2-3份；羟基硅油 2-3份；防老剂 0.8-1.5份；活性氧化锌 1.5-3份；硬脂酸 0.4-0.6份。天然橡胶/三元乙丙橡胶/乙烯基硅橡胶的共混体系,在相容剂的帮助下,能够较好混合,使得鞋底材料具有优良的机械性能、耐老化性能以及透气性能,适用于作为休闲皮鞋的鞋底,提高人们穿着的舒适感。(The invention discloses a breathable sole and a production process thereof, wherein the breathable sole comprises the following components in parts by weight: 35-45 parts of natural rubber; 20-25 parts of ethylene propylene diene monomer; 35-45 parts of vinyl silicone rubber; 4-7 parts of a compatilizer; 1.5-3 parts of a vulcanizing agent; 1-1.5 parts of an accelerator; 40-60 parts of a filler; 2-3 parts of a foaming agent H; 2-3 parts of hydroxyl silicone oil; 0.8-1.5 parts of anti-aging agent; 1.5-3 parts of active zinc oxide; 0.4-0.6 part of stearic acid. The natural rubber/ethylene propylene diene monomer/vinyl silicone rubber blending system can be well mixed with the help of the compatilizer, so that the sole material has excellent mechanical property, aging resistance and air permeability, is suitable for being used as soles of casual leather shoes, and improves the comfort of people wearing.)

1. The breathable sole is characterized by comprising the following components in parts by weight:

35-45 parts of natural rubber;

20-25 parts of ethylene propylene diene monomer;

35-45 parts of vinyl silicone rubber;

4-7 parts of a compatilizer;

1.5-3 parts of a vulcanizing agent;

1-1.5 parts of an accelerator;

40-60 parts of a filler;

2-3 parts of a foaming agent H;

2-3 parts of hydroxyl silicone oil;

0.8-1.5 parts of anti-aging agent;

1.5-3 parts of active zinc oxide;

0.4-0.6 part of stearic acid;

the preparation process of the compatilizer is as follows:

firstly, mixing 1-2 parts by weight of AEO-9, 4-6 parts by weight of dodecylbenzene sulfonic acid and 80-90 parts by weight of water, heating to 25-30 ℃, uniformly stirring, then adding 2-3 parts by weight of KH570 and 8-10 parts by weight of octamethylcyclotetrasiloxane, and continuously stirring to obtain a mixed solution A;

secondly, heating half of the mixed solution A to 80-90 ℃, adding 12-15 parts of methyl methacrylate, and continuously stirring for reacting for 40-60min to obtain a mixed solution B;

thirdly, adding the mixed solution B into the rest mixed solution A, stirring at the temperature of 80-90 ℃ for 2-3h, and cooling to obtain a mixed solution C;

fourthly, regulating the pH value of the mixed solution C to 9-9.5 by using a sodium hydroxide solution, introducing nitrogen for protection, adding 0.6-1.2 parts of ethylene glycol dimethacrylate, 20-25 parts of butyl acrylate and 2-3 parts of dodecyl mercaptan, swelling for 15-20min, adding 4-6 parts of a potassium sulfate solution, and reacting for 2-3h to obtain a mixed solution D;

and fifthly, adding 12-15 parts of methyl methacrylate into the mixed solution D, swelling for 15-20min, adding 4-6 parts of potassium sulfate solution, reacting for 2-3h, adding 20-30 parts of calcium chloride solution, performing suction filtration, washing with water, and drying to obtain the compatilizer.

2. A breathable sole for shoes according to claim 1, characterized in that: also comprises 1-1.5 parts of allantoin.

3. A breathable sole for shoes according to claim 1, characterized in that: also comprises 10-15 parts of POE.

4. A breathable sole for shoes according to claim 1, characterized in that: the vulcanizing agent is compounded by DCP and sulfur.

5. A breathable sole for shoes according to claim 4, characterized in that: the accelerant is compounded by an accelerant M and an accelerant TMTD.

6. A breathable sole for shoes according to claim 1, characterized in that: the anti-aging agent is prepared by compounding an anti-aging agent RD and an anti-aging agent 4010.

7. A breathable sole for shoes according to claim 1, characterized in that: the filler comprises light calcium carbonate, kaolin and modified carbon fiber, and the preparation process of the modified carbon fiber is as follows:

firstly, heating the chopped carbon fibers to 400-440 ℃ for 40-50 min;

secondly, cleaning the heat-treated chopped carbon fibers with acetone, drying at 80-90 ℃, immersing in a mixed solution of sulfuric acid and potassium chlorate, heating to 80-90 ℃, and reacting for 80-100 min;

and thirdly, immersing the processed chopped carbon fibers into a 2-4% titanate solution, performing ultrasonic dispersion for 5-10min, finally stirring and refluxing for 1h at 80-90 ℃, filtering, and then performing alcohol washing, water washing and drying to obtain the modified carbon fibers.

8. A process for the production of a breathable sole for shoes according to claim 1, characterized in that it comprises the following steps:

s1 plastication: firstly, respectively putting natural rubber and ethylene propylene diene monomer rubber into an open mill, plasticating for 6-8min at the temperature of 45-55 ℃;

s2 mixing: mixing vinyl silicone rubber, plasticated natural rubber and ethylene propylene diene monomer rubber, adding the mixture into an internal mixer, adding a compatilizer and hydroxyl silicone oil, heating to 50-60 ℃, mixing for 5-10min, adding a vulcanizing agent, an accelerator, a filler, a foaming agent H, an anti-aging agent, active zinc oxide and stearic acid, mixing for 15-20min at the temperature of 80-90 ℃, and discharging to obtain rubber compound;

s3 vulcanization: vulcanizing the rubber compound at the temperature of 150 ℃ and 160 ℃ for 30-40min, and discharging to obtain a rubber material;

s4 forming: the rubber material is subjected to hot press molding by a sole mold to obtain the breathable sole.

Technical Field

The invention relates to a sole, in particular to a breathable sole and a production process thereof.

Background

At present, the shoes have various kinds and have various functions according to different purposes and applicable ground. Common shoes comprise sports shoes, casual leather shoes, slippers and the like, wherein the casual leather shoes are suitable for being worn by people in casual life at ordinary times and need to have basic performances such as wear resistance, skid resistance, ventilation and the like. At present, the leisure leather shoes take natural leather or synthetic leather as the vamp, and the soles are made of leather, rubber, foamed PU and other materials.

Natural leather is used as a sole material, and is known as a breathable sole because of its excellent air permeability. However, natural leather is expensive, is only suitable for high-grade leather shoes, and has poor wear resistance. Therefore, most leisure leather shoes are made of rubber materials, have good wear resistance and skid resistance, and meet the requirements of daily life. However, rubber soles are poor in air permeability, and the feet are likely to feel stuffy when worn, and currently, studies on air-permeable rubbers are few.

Disclosure of Invention

In view of the above-mentioned technical drawbacks, the present invention provides a breathable sole having good breathability.

In order to achieve the purpose, the invention provides the following technical scheme:

a breathable sole comprises the following components in parts by weight:

35-45 parts of natural rubber;

20-25 parts of ethylene propylene diene monomer;

35-45 parts of vinyl silicone rubber;

4-7 parts of a compatilizer;

1.5-3 parts of a vulcanizing agent;

1-1.5 parts of an accelerator;

40-60 parts of a filler;

2-3 parts of a foaming agent H;

2-3 parts of hydroxyl silicone oil;

0.8-1.5 parts of anti-aging agent;

1.5-3 parts of active zinc oxide;

0.4-0.6 part of stearic acid;

the preparation process of the compatilizer is as follows:

firstly, mixing 1-2 parts by weight of AEO-9, 4-6 parts by weight of dodecylbenzene sulfonic acid and 80-90 parts by weight of water, heating to 25-30 ℃, uniformly stirring, then adding 2-3 parts by weight of KH570 and 8-10 parts by weight of octamethylcyclotetrasiloxane, and continuously stirring to obtain a mixed solution A;

secondly, heating half of the mixed solution A to 80-90 ℃, adding 12-15 parts of methyl methacrylate, and continuously stirring for reacting for 40-60min to obtain a mixed solution B;

thirdly, adding the mixed solution B into the rest mixed solution A, stirring at the temperature of 80-90 ℃ for 2-3h, and cooling to obtain a mixed solution C;

fourthly, regulating the pH value of the mixed solution C to 9-9.5 by using a sodium hydroxide solution, introducing nitrogen for protection, adding 0.6-1.2 parts of ethylene glycol dimethacrylate, 20-25 parts of butyl acrylate and 2-3 parts of dodecyl mercaptan, swelling for 15-20min, adding 4-6 parts of a potassium sulfate solution, and reacting for 2-3h to obtain a mixed solution D;

and fifthly, adding 12-15 parts of methyl methacrylate into the mixed solution D, swelling for 15-20min, adding 4-6 parts of potassium sulfate solution, reacting for 2-3h, adding 20-30 parts of calcium chloride solution, performing suction filtration, washing with water, and drying to obtain the compatilizer.

By adopting the technical scheme, the natural rubber has higher elasticity, certain plasticity and excellent mechanical property at normal temperature, and is a common sole rubber material. The ethylene propylene diene monomer is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, and the side chain of the ethylene propylene diene monomer contains unsaturated double bonds, so that the ethylene propylene diene monomer has excellent weather resistance, heat resistance and other aging resistance. The main chain of the vinyl silicone rubber is composed of silicon and oxygen atoms alternately, so that the vinyl silicone rubber has excellent high temperature resistance, low temperature resistance, aging resistance and hydrophobicity, and the air permeability of the vinyl silicone rubber is most excellent in synthetic polymer.

The compatibility of different types of high polymer materials directly influences whether the performance of the material obtained by blending is improved or not, the compatibility of the silicon rubber and other two main materials is poor, and the performance of the rubber material obtained by directly mixing is not ideal. By utilizing the similar compatibility principle, the compatilizer suitable for a natural rubber/ethylene propylene diene monomer rubber/silicon rubber system is prepared. The compatilizer has Si-O-Si bonds which are the same as silicon rubber molecular chains, has C = O double bonds which are strong polar groups in the same position with the C = C double bonds, and is added during mixing to effectively improve the compatibility of different phase interfaces, so that the obtained rubber material has the advantages of the three materials. The addition of the hydroxyl silicone oil can introduce more hydrophobic groups to improve the hydrophobicity of the sole, and can help to form fine micropores in the sole during vulcanization foaming to improve the air permeability. Therefore, the sole prepared by the invention not only has good mechanical property and aging resistance, meets the daily wearing requirement, but also has good air permeability and water resistance, and reduces the stuffiness feeling of feet.

The invention is further configured to: also comprises 1-1.5 parts of allantoin.

By adopting the technical scheme, the allantoin can be used as an auxiliary agent of the foaming agent H, so that micropores formed in the sole are refined and densified, and the air permeability of the sole is improved.

The invention is further configured to: also comprises 10-15 parts of POE.

By adopting the technical scheme, the POE (polyolefin elastomer) is added with the composite rubber system, which is beneficial to improving the toughness and the air permeability of the sole material.

The invention is further configured to: the vulcanizing agent is compounded by DCP and sulfur.

By adopting the technical scheme, compared with single sulfur as a vulcanizing agent, the vulcanizing effect is good.

The invention is further configured to: the accelerant is compounded by an accelerant M and an accelerant TMTD.

By adopting the technical scheme, the vulcanizing agent is suitable for a DCP/sulfur vulcanizing agent system.

The invention is further configured to: the anti-aging agent is prepared by compounding an anti-aging agent RD and an anti-aging agent 4010.

Through adopting above-mentioned technical scheme, the ageing resistance of sole improves.

The invention is further configured to: the filler comprises light calcium carbonate, kaolin and modified carbon fiber, and the preparation process of the modified carbon fiber is as follows:

firstly, heating the chopped carbon fibers to 400-440 ℃ for 40-50 min;

secondly, cleaning the heat-treated chopped carbon fibers with acetone, drying at 80-90 ℃, immersing in a mixed solution of sulfuric acid and potassium chlorate, heating to 80-90 ℃, and reacting for 80-100 min;

and thirdly, immersing the processed chopped carbon fibers into a 2-4% titanate solution, performing ultrasonic dispersion for 5-10min, finally stirring and refluxing for 1h at 80-90 ℃, filtering, and then performing alcohol washing, water washing and drying to obtain the modified carbon fibers.

By adopting the technical scheme, on one hand, the filler can reinforce the rubber material and improve the wear resistance and toughness of the sole; on the other hand, the modified carbon fiber is used as a novel filler, is added into the rubber system, and can also penetrate through part of closed cells, so that the air permeability of the sole is improved.

Another purpose of the invention is to provide a production process of the breathable sole.

A production process of a breathable sole comprises the following steps:

s1 plastication: firstly, respectively putting natural rubber and ethylene propylene diene monomer rubber into an open mill, plasticating for 6-8min at the temperature of 45-55 ℃;

s2 mixing: mixing vinyl silicone rubber, plasticated natural rubber and ethylene propylene diene monomer rubber, adding the mixture into an internal mixer, adding a compatilizer and hydroxyl silicone oil, heating to 50-60 ℃, mixing for 5-10min, adding a vulcanizing agent, an accelerator, a filler, a foaming agent H, an anti-aging agent, active zinc oxide and stearic acid, mixing for 15-20min at the temperature of 80-90 ℃, and discharging to obtain rubber compound;

s3 vulcanization: vulcanizing the rubber compound at the temperature of 150 ℃ and 160 ℃ for 30-40min, and discharging to obtain a rubber material;

s4 forming: the rubber material is subjected to hot press molding by a sole mold to obtain the breathable sole.

In conclusion, the invention has the following beneficial effects:

1. the natural rubber/ethylene propylene diene monomer/vinyl silicone rubber/POE blending system can be well mixed with the help of the compatilizer, so that the sole material has excellent mechanical property, aging resistance and air permeability, is suitable for being used as soles of casual leather shoes, and improves the comfort of people wearing;

2. the modified carbon fiber and the hydroxyl silicone oil can properly improve the air permeability of the sole and reduce the stuffy feeling of feet.

Drawings

Fig. 1 is a schematic flow chart of the first to third embodiments.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.