Lightweight, flame retardant and rubber foaming sole material and manufacturing method thereof

Abstract

The invention relates to a rubber foaming sole material and a manufacturing method thereof, and especially relates to a manufacturing method of the sole footwear products which has high requirements on lightweighting, the flame retardation performance and the wear resistance. The material comprises the following compositions: a chlorosulfonated polyethylene rubber (CSM), a butadiene rubber (BR), a natural rubber (NR), a plasticizer, a strengthening agent, an activator, a coupling agent, a vulcanizing agent, an accelerating agent, and an antioxidant. In the invention, a series of sole materials are prepared through screening coupling agents, accelerating agents, activators, foaming agents, and fire retardants and reasonably controlling a technology on the basis of rubbers, softening oil and the strengthening agent, the lightweight and flame retardation footwear outsole material which has a density of 0.8-1.0g / cm<3> and has a maximum heat release rate of equal to or less than 110kW / m<2>and a DIN abrasion of equal to or less than 120mm<3> in tests with a tapered calorimeter is obtained through optimizing the formula and the technology. The material has the following advantages: 1, the specific gravity is light, and the flame retardation and the wear resistance are excellent; 2, the heat resistance and the light resistance are good, and the fire retardant is not easy to migrate from the surface; and 3, toxic gases of polybrominated dibenzo-p-dioxin (PBDD) and polybrominated dibenzo-furan (PBDF) are not released in combustion when a sole is discarded.

Description

(1) Technical field [0001] The invention relates to a lightweight flame-retardant rubber foam sole material and a manufacturing method thereof. The material is suitable for soles of footwear products with high requirements on light weight, flame retardancy and wear resistance. (2) Background technology [0002] At present, the soles of work boots that require high temperature resistance mainly use chloroprene rubber (CR) as the main raw material, and use decabromodiphenyl ether and antimony trioxide as flame retardants to make soles with flame-retardant functions. However, neoprene raw rubber is easy to crystallize and harden at low temperature, and has poor storage stability. The storage period of neoprene raw rubber is one year, and the shortest is only half a year. The storage period of raw rubber is too short, which is not conducive to preservation. And there is following deficiency in above-mentioned sole material: (1) specific gravity is bigger, and density is at 1.2...

AI Technical Summary

Problems solved by technology

However, neoprene raw rubber is easy to crystallize and harden at low temperature, and has poor storage stability.

The storage period of neoprene raw rubber is one year, and the shortest is only half a year. The storage period of raw rubber is too short, which is not conducive to preservation.

And there is following deficiency in above-mentioned sole material: (1) specific gravity is bigger, and density is at 1.2-1.4g / cm 3 Among them, the soles are heavy, hard, and poor, which affects the wearing comfort, and the feet are prone to fatigue, which has a certain adverse effect on the performance and completion of the technical actions of the staff who perform the tasks; (2) the performance of the flame-retardant soles The heat resistance and light resistance are poor, and the flame retardants are easy to migrate from the surface, thus losing the flame retardant properties; (3) After the shoes are discarded, due to the presence of polybrominated diphenyl ether flame retardants in the soles, toxic PBDEs are released during combustion. Polybrominated phenyl-para-dioxin (PBDD) and polybrominated diphenylfuran (PBDF), which seriously pollute the environment and threaten human health

[0010] The above research reports on flame-retardant CSM have the following problems: Regarding the vulcanization system of CSM, if lead oxide is used, the quality of the vulcanizate is good, but it is black and highly toxic, which is not good for the environment; regarding the flame-retardant system of CSM, If polybrominated diphenyl ethers are used, the waste gas of the material will be burned to release toxic polybrominated phenyl-para-dioxin (PBDD) and polybrominated diphenylfuran (PBDF), which seriously pollute the environment and threaten human health.

[0011] There is no report on flame-retardant chlorosulfonated polyethylene rubber, especially flame-retardant foamed chlorosulfonated polyethylene rubber used in shoe soles

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