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What is the difference between EPE, EVA foam and sponge?
Issuing time:2017-12-07 22:04

EPE, EVA foam, sponge, all three kinds of materials are known to you, so are the materials of the three to distinguish you only?

The differences between the three main points are as follows:

1. With the naked eye, the sponge is generally yellowish and elastic, which is relatively light. EVA is a little stiff, usually black, is among the heaviest inside, EPE pearl cotton is usually white, with a good sponge, sponge restorable, no matter how you just according to the points and EPE pearl cotton press you hard you will hear the voice of the spluttered, press place will hollows.

2.EPE pearl cotton has wavy lines and looks like a lot of bubbles. Very light.EVA is solid, with a concentration of how much and heavy.

EPE (ExpandablePolyethylene), polyethylene, also known as pearl cotton. Dispute crosslinking obturator structure, it is a low density polyethylene (LDPE) as the main raw material extrusion generated high polyethylene foam products, it is made of low density polyethylene resin by the physical foaming of numerous independent bubble. It overcomes the shortcoming of ordinary foaming glue, which is fragile, deformed and restitution. It has many advantages such as waterproof, shockproof, sound insulation, heat preservation, plasticity, toughness, recycling, environmental protection, anti-collision and so on. It also has good chemical resistance.

Sponge is mostly made of isocyanate and polyol raw materials to synthesize, polyols and isocyanates more is basic reaction in the production of polyurethane reaction, commonly used learning called soft polyurethane foam sponge rubber, polyurethane (pu) is one of the most common in life polymer materials, widely used in the production of all kinds of "sponge" products. And resilient materials for shock absorbers and anti-friction USES.

EVA is made from ethylene (E) and vinyl acetate (VA). EVA is characterized by good softness, elasticity of rubber, under - 50 ℃ can still has good flexible, good transparency, or surface gloss, good chemical stability, anti-aging and good ozone resistance strength, non-toxic. Good mixing with filler, good dyeing and forming process. EVA injection molding, extrusion, blow molding, calendering, rotomolding vacuum thermoforming, foam, coating, heat sealing, welding and other processing, can be used as a building material used as a waterproof, fire, sound insulation, etc.