Labor insurance shoes shock absorption material which is better?

Labor insurance shoes need special pay attention to the wearing comfort of workers, using different damping materials can have different damping effect: 1, EVA is now in the production of labor insurance shoes are the most widely used shock absorption material, mainly used in the bottom. Main component is vinegar, vinyl acetate ethylene n-butyl acrylate polymers, such as elastomer foam formation. Adjust the foaming agent can get different hardness of elastic products. Fillers generally for titanium dioxide, zinc oxide, calcium carbonate, such as too much dosage can cause compression permanent deformation is large, elasticity is small. Add PE can increase the tensile and tear strength, but the poor flexibility and easy bad adhesion control. 2, PU polyurethane can be used for labor insurance shoes ( Safety shoes) In the end, high-pressure, chose a polyurethane, because it is itself good abrasion resistance, good elasticity, light weight. Pull bad after foaming, ageing resistance. （ Labor insurance shoes rubber soles) 3, rubber is mainly used in labor insurance shoes soles, chose rubber damping materials, mainly because of foaming rubber has good elasticity, damping rubber is special. In general rubber, butyl rubber and nitrile butadiene rubber damping coefficient is larger; Styrene butadiene rubber, chloroprene rubber, silicone rubber, polyurethane rubber, ethylene propylene rubber damping coefficient of medium; Natural rubber and butadiene rubber damping coefficient is minimal. Although natural rubber damping coefficient minimum, its comprehensive performance is good, good fatigue resistance, heat production is low, creep, have good and metal bonding. Therefore, natural rubber is widely used in damping rubber. If required good low temperature resistance, but with butadiene rubber and; For resistance to aging, can with neoprene with; For oil resistant, can with low propylene content of acrylic nitrile butadiene rubber and, for low temperature dynamic performance demanding damping rubber, often adopt silicon rubber. General requirements of low damping, used natural rubber; When demand high damping, butyl rubber can be used. Some good heat resistance rubber, such as fluorine rubber, acrylate rubber, epdm rubber, silicone rubber, hydrogenated nitrile butadiene rubber, chlorosulfonated polyethylene, copolymerization chlorohydrin rubber, due to their fatigue resistance under high deformation and metal bonding reliability is poor, and therefore not suitable for damping rubber.
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