EVA insoles EVA is the main material processing insoles, in the footwear industry and insoles have a wide range of applications. EVA insoles are usually based on EVA as the main material insoles, with the fabric, leather, and other fabrics made of composite suppression.
EVA Material Description Editor
EVA is ethylene - vinyl acetate (vinyl acetate) ester copolymer, which is made by the copolymerization of ethylene (E) and vinyl acetate (VA), the English name is: Ethylene Vinyl Acetate, referred to as EVA, or E / VAC. General vinyl acetate (VA) content of 5% to 40%. Compared with polyethylene, EVA introduced into the molecular chain of vinyl acetate monomer, thereby reducing the degree of crystallinity, increased flexibility, impact resistance, filler compatibility and heat sealing performance. In general, the performance of EVA resin depends mainly on the molecular chain of vinyl acetate content. Due to the adjustable proportions of the constituent components to meet different application requirements, the higher the content of VA content, the higher the transparency, softness and toughness will be.
The usual EVA insole molding for cold forming, the main production steps are as follows
1: Will fit the fabric of EVA material, cut into size suitable for shoe mold size
2: The cut EVA material, put about 150 --- 190 ℃ baking oven until the EVA material becomes soft, aging.
3: The softened EVA material into the mold of the machine forming. Molding mold is usually hollow, a cooling water temperature control in the mold between 15 ---- 20 ℃.
4: EVA material in the mold shrinkage and compression, resulting in changes in the shape of EVA material to form insole shape.
5: Will suppress a good EVA insole trimming or cutting. Made insoles.
EVA insole advantages are:
EVA resin is a blend of foam products. Has good flexibility; flexibility can also be, chemical resistance and other properties, so there are more widely used, such as in the low-grade travel shoes, hiking shoes, slippers, sandals and so on.