EVA Knowledge Of Shoe Materials Lets You Buy Shoes.

EVA is made from ethylene vinyl acetate copolymer.

Compared with polyethylene, EVA introduced a vinyl acetate monomer into the molecular chain, thus reducing the high crystallinity and improving the performance.

Property, impact resistance, filler miscibility and thermal sealing performance.

EVA midsole means that EVA is injected into the mold and heated at high temperature for one time.

The middle bottom is also called a foaming middle sole.

The traditional EVA is hot pressed, and the EVA ejector directly shoots the EVA particles into the mold of the machine. After about 400 seconds, the mold is opened and the soles inside the mold are foamed and molded through heat and cold setting boxes. This method is characterized by high output and one time molding. The disadvantage is that it is easy to deform, and the time is long, yellowing and shrinking.

EVA soles have high resilience and high tensile strength, high toughness, good shock resistance and cushioning properties, heat insulation, heat preservation, cold resistance and low temperature performance. They can withstand cold and sun exposure. They are sealed with foam holes, sound insulation effect is good, and the airtight pore structure, no water absorption, moisture proof and water resistance are good. They are resistant to corrosion of sea water, grease, acid, alkali and other chemicals, and are antibacterial, non-toxic, tasteless, and pollution-free.

How to identify is EVA

:

1, PU bottom, cut a small piece of ignition, flame stability without green edge, melting and dropping phenomenon.

2, at the bottom of PVC, cut a small piece, ignite the flame beating with green edges, and extinguish the fire.

3. At the bottom of EVA, a small piece of light is lit, with the smell of candle and the phenomenon of melting and dropping.

4, rubber bottom, cut a small piece of ignition, tires burning coke smell, black smoke.

5, TPR bottom, cut a small piece, ignite the flame beating, the burning place is melted, will not extinguish from the fire, can be dissolved in a stupid.