EVA sole identification and wear resistance improvement method
Nowadays, the soles of many shoes are made of EVA material, which is not only comfortable but also wearable, which is very popular among consumers. Today, the editor will tell you about the method of identifying the EVA sole and the method of improving the wear resistance of the sole. I hope to help everyone. The details are as follows.
EVA sole identification method
The material used for the EVA sole is an ethylene/vinyl acetate copolymer (also known as ethylene-vinyl acetate copolymer) which is obtained by copolymerization of ethylene (E) and vinyl acetate (VA). Referred to as EVA, the content is 5% to 40%. Compared with polyethylene, EVA is widely used in foaming shoes due to the introduction of vinyl acetate monomer in the molecular chain, which reduces high crystallinity, improves flexibility, impact resistance, filler compatibility and heat sealing performance. Materials, functional shed film, packaging film, hot melt adhesive, wire and cable and toys.
1. The mechanical strength is moderate, the tear strength is large, and the puncture resistance, resilience and stress crack resistance are good.
2. Soft, flexible, and has a certain rubber elasticity: low temperature resistance, flexibility at temperatures as low as -58С.
3. EVA soles There is no injection port, a small piece is ignited, and there is a burning smell of the candle and melting and dripping.
4. Due to the polarity of the acetate, the elasticity and viscosity of the EVA are increased, the crystallinity and electrical properties are lowered, and it is soluble in hydrocarbons and oils, and is resistant to aging and ozone. In a class of EVA soles, only after a few years of use will the appearance of a shoe often turn yellow.
EVA sole wear resistance improvement method
The EVA sole has excellent wear resistance, tear resistance, elasticity, but poor slip resistance and must be modified. Similar to tires, the slip resistance and wear resistance cannot be balanced and can only be biased towards certain performance indicators. The anti-slip requires a large friction force, and the wear resistance requires a small friction force, which is the essential reason.
Anti-slip wear-resistant EVA sole, the EVA sole material is fully mixed with foaming agent, filling agent and foaming agent; EVA sole material is ethylene vinyl acetate EVA, polyolefin elastomer POE, styrene thermoplastic rubber compound Materials and EVA/POE polymers. The raw material ratio is: ethylene vinyl acetate EVA 30-40%, polyolefin elastomer POE 40-50%, styrene thermoplastic rubber composite 15-30%, EVA/POE polymer 5-10%. The anti-slip wear-resistant EVA shoe material enhances the softness and elasticity of the rubber particles by adding a styrene-based thermoplastic rubber composite material, and has an anti-shock effect, and the EVA/POE polymer enhances the wear resistance.
The above is about the EVA sole identification method and the improvement of the wear resistance method. I hope everyone can understand the EVA sole identification method and the wear resistance improvement method, which will help everyone.
