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CN-121975223-A - Sole material, preparation method thereof and sole prepared from sole material

CN121975223ACN 121975223 ACN121975223 ACN 121975223ACN-121975223-A

Abstract

The invention discloses a sole material, a preparation method thereof and a sole prepared from the sole material, wherein the sole material comprises EVA resin, composite modified filler, nitrile rubber, a cross-linking agent, a foaming agent and an anti-aging agent; the concrete formula comprises the following raw materials of 70-80 parts of EVA resin, 10-20 parts of composite modified filler, 3-5 parts of nitrile rubber, 0.5-2 parts of cross-linking agent, 3-6 parts of foaming agent and 0.5-1 part of anti-aging agent; according to the invention, the composite modified filler is added into the sole material, the characteristics and the optimal formula proportion of the calcium carbonate powder, the iron slag powder and the sepiolite are comprehensively considered by the composite modified filler, meanwhile, a layer of chemically bonded interface layer can be formed on the surface of the silane coupling agent, the binding force with the EVA resin material and the internal dispersibility are enhanced, the cost of the calcium carbonate powder is fully exerted, the hardness and the dimensional stability are improved, the iron slag powder is rich in metal elements such as iron, the sepiolite has good adsorptivity, the wear resistance and the skid resistance are enhanced, and the use requirement is better met.

Inventors

  • LI XUSHENG
  • SU PING
  • Liu Gongyao
  • XU QINGHUA
  • ZENG MINGHUA

Assignees

  • 泉州市名晋体育用品有限公司

Dates

Publication Date
20260505
Application Date
20260313

Claims (10)

  1. 1. A sole material is characterized by comprising the following raw materials of EVA resin, composite modified filler, nitrile rubber, a cross-linking agent, a foaming agent and an anti-aging agent; the concrete formula comprises the following raw materials (by mass portion) of 70-80 portions of EVA resin, 10-20 portions of composite modified filler, 3-5 portions of nitrile rubber, 0.5-2 portions of cross-linking agent, 3-6 portions of foaming agent and 0.5-1 portion of anti-aging agent.
  2. 2. A sole material according to claim 1, characterized in that it comprises the following raw materials: 74 parts of EVA resin, 15 parts of composite modified filler, 4 parts of nitrile rubber, 1 part of cross-linking agent, 5 parts of foaming agent and 1 part of anti-aging agent.
  3. 3. The sole material according to claim 1, wherein the EVA resin is an EVA resin having a VA content of 30-40%, and the acrylonitrile-butadiene rubber has an acrylonitrile content of 28-30%.
  4. 4. A sole material according to claim 3, wherein the cross-linking agent is one of dicumyl peroxide and DCP, the foaming agent is one of azodicarbonamide and AC, and the anti-aging agent is one of paraffin wax, microcrystalline wax and anti-fog wax.
  5. 5. A sole material according to claim 3, wherein the composite modified filler comprises, by mass, 35-45 parts of calcium carbonate powder, 12-18 parts of iron slag powder, 18-22 parts of sepiolite powder, 1-3 parts of a 2% aqueous solution of a silane coupling agent, and 7-8 parts of a phthalate plasticizer.
  6. 6. The sole material according to claim 5, wherein the preparation method of the composite modified filler comprises the following steps: Firstly, carrying out magnetic separation treatment on iron slag powder, then putting the iron slag powder subjected to magnetic separation into a ball mill for grinding, screening by using a vibrating screen, and selecting 300-400-mesh iron slag powder for later use; Crushing sepiolite raw ore, soaking the crushed particles with 5-10% hydrochloric acid solution for 2-3h, repeatedly flushing with deionized water until the pH value of flushing liquid is close to 7, drying, grinding and screening the sepiolite at 80-100 ℃, and selecting 300-400-mesh sepiolite powder for later use; Adding the calcium carbonate powder into a stirrer, stirring for 3-5min at the speed of 300-500r/min, then adding the iron slag powder and the sepiolite powder, and continuously stirring for 5-10min to fully mix the three; And fourthly, heating the mixed powder to 50-60 ℃, slowly adding 2% of aqueous solution of the silane coupling agent, continuously stirring for 20min, adding the phthalate plasticizer, and stirring for 10-15min to uniformly mix all the components to obtain the composite modified filler.
  7. 7. The sole material according to claim 6, wherein the purity of the calcium carbonate powder is greater than or equal to 99%, and the calcium carbonate powder is 300-400.
  8. 8. A method of making a sole material according to any one of claims 1 to 7, comprising the steps of: removing water of EVA resin and nitrile rubber in a vacuum drying mode to reduce the water content to below 0.1%, then adding the weighed EVA resin and nitrile rubber into a stirrer, gradually increasing the stirring speed to 500-1000r/min, and stirring for 15-30min to fully and uniformly mix the raw materials; Transferring the mixed materials into an internal mixer, adding a cross-linking agent for internal mixing, setting the temperature of the internal mixer to be 120-140 ℃, setting the rotating speed of a rotor to be 40-60r/min, and the internal mixing time to be 10-15min, then putting the internal mixed materials into an open mill, and adding a composite modified filler, an anti-aging agent and a foaming agent for full tamping to obtain the sole material.
  9. 9. The method for preparing a sole material according to claim 8, wherein the roll temperature of the open mill is controlled to be 80-100 ℃, the roll gap is adjusted to be 4-5 mm, and the material is further plasticized and pressed into a sheet with uniform thickness through the open mill.
  10. 10. Sole, characterized in that the sole material and the method of preparation according to any of claims 1-9 are injection molded.

Description

Sole material, preparation method thereof and sole prepared from sole material Technical Field The invention relates to the technical field of sole materials, in particular to a sole material, a preparation method thereof and a manufactured sole. Background With the improvement of the living standard and the enhancement of health consciousness of people, the performance requirements on sports equipment are also higher and higher, and the performance of the sole serving as an important component of the sports shoes directly influences the wearing comfort. EVA resin has the advantages of good flexibility, elasticity, impact resistance, chemical corrosion resistance and the like, is widely applied to the manufacture of soles, can provide necessary buffering and support for feet of users, reduces impact force received by feet in the exercise process, reduces injury risk and provides comfort for daily walking of people. However, the sole material of EVA resin alone is relatively insufficient in supporting force, and for some people with high or flat foot arch, it is impossible to provide sufficient arch support, and long-term wearing may cause fatigue and pain of the foot, even affect normal development of gait, and after a period of wearing, the sole is frequently subjected to high pressure and impact force when the wearer performs high-intensity exercises such as running, jumping, etc. As the use time increases, the thickness of the sole becomes thinner gradually, and collapse problems occur, resulting in deterioration of the fit between the foot and the sole, which not only affects the comfort of use, but also reduces the life thereof. Therefore, how to improve the performance of EVA resin sole materials is a current urgent problem to be solved. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a sole material, a preparation method thereof and a manufactured sole, so as to solve the problems in the prior art. The invention solves the technical problems by adopting the following technical scheme: the invention provides a sole material, which comprises EVA resin, composite modified filler, nitrile rubber, a cross-linking agent, a foaming agent and an anti-aging agent; The concrete formula comprises the following raw materials of 70-80 parts of EVA resin, 10-20 parts of composite modified filler, 3-5 parts of nitrile rubber, 0.5-2 parts of cross-linking agent, 3-6 parts of foaming agent and 0.5-1 part of anti-aging agent. Preferably, the sole material comprises the following raw materials: 74 parts of EVA resin, 15 parts of composite modified filler, 4 parts of nitrile rubber, 1 part of cross-linking agent, 5 parts of foaming agent and 1 part of anti-aging agent. Preferably, the EVA resin is EVA resin with VA content of 30-40%, and the acrylonitrile content in the nitrile rubber is 28-30%. Preferably, the cross-linking agent is one of dicumyl peroxide and DCP, the foaming agent is one of azodicarbonamide and AC, and the anti-aging agent is one of paraffin wax, microcrystalline wax and anti-fog wax. Preferably, the composite modified filler comprises, by mass, 35-45 parts of calcium carbonate powder, 12-18 parts of iron slag powder, 18-22 parts of sepiolite powder, 1-3 parts of a 2% silane coupling agent aqueous solution and 7-8 parts of phthalate plasticizers. Preferably, the preparation method of the composite modified filler comprises the following steps: Firstly, carrying out magnetic separation treatment on iron slag powder, then putting the iron slag powder subjected to magnetic separation into a ball mill for grinding, screening by using a vibrating screen, and selecting 300-400-mesh iron slag powder for later use; Crushing sepiolite raw ore, soaking the crushed particles with 5-10% hydrochloric acid solution for 2-3h, repeatedly flushing with deionized water until the pH value of flushing liquid is close to 7, drying, grinding and screening the sepiolite at 80-100 ℃, and selecting 300-400-mesh sepiolite powder for later use; Adding the calcium carbonate powder into a stirrer, stirring for 3-5min at the speed of 300-500r/min, then adding the iron slag powder and the sepiolite powder, and continuously stirring for 5-10min to fully mix the three; And fourthly, heating the mixed powder to 50-60 ℃, slowly adding 2% of aqueous solution of the silane coupling agent, continuously stirring for 20min, adding the phthalate plasticizer, and stirring for 10-15min to uniformly mix all the components to obtain the composite modified filler. Preferably, the purity of the calcium carbonate powder is more than or equal to 99 percent, and the calcium carbonate powder is 300-400. The invention also provides a preparation method of the sole material, which comprises the following steps: removing water of EVA resin and nitrile rubber in a vacuum drying mode to reduce the water content to below 0.1%, then adding the weighed EVA resin and nitrile rubber into a stirrer, gradually increa