EVA is used in sports shoes to absorb impact shock. It is a popular material for slippers and sandals because it forms to fit the foot, it is light weight, it does not hold odors, and it provides glossy finishes.
Compared to natural rubber, EVA is a much more cost effective material. Because EVA is a buoyant material, it is used in fishing and water sports gear as well as non-traditional items like floating eyewear. It is used as a substitute for cork for fishing rod handle butt-ends. This formulation is the most brittle.
Medium percentage vinyl acetate. This formulation is more flexible than low percentage vinyl acetate. High percentage vinyl acetate. This is the most flexible and versatile formulation. Vinyl-acetate modified polyethylene is processed like a thermoplastics material and is usually considered to be non-toxic. It is a thermoplastic elastomer material that is not vulcanized. This kind of EVA shares some of the properties of rubber.
If you spent more of chemistry class staring at your shoes and wishing you were out running than you did thinking about ethyls and vinyls, you might know that EVA is the most common cushioning material in athletic footwear midsoles. It is also easy to form and easy to manufacture in a rainbow of colors. EVA is used for cheap sneakers and the most expensive athletic footwear alike.
EVA is used mostly for the midsole or the layer sandwiched between the outsole and upper. The midsole is the part responsible for cushioning and energy return, which aid in comfort, efficiency, and protection. Stability is also an essential feature midsoles provide. This is why midsoles have to be constructed from materials that are capable of handling pressure, either from the weight of the user or the surface they are running on.
Again, EVA has ideal characteristics. Contrary to popular belief, EVA is not just used for midsoles. These days, the use of EVA in shoe manufacturing is more varied than before, and advances in materials have put EVA in new parts of your favorite shoes. Take the outsole and insole of shoes, for example.
For one thing, EVA soles are resistant to corrosion caused by sea water, fats, oil, or chemicals certain types of rubber degrade quickly when in contact with oil. It is also considered safe and environmentally friendly, due to its anti-bacterial and non-toxic properties. It is a copolymer and is processed as a thermoplastics material — just like low density polyethylene. It has some of the properties of a low-density polyethylene.
Generally considered as a non-toxic material. It is not vulcanized but has some of the properties of a rubber or of plasticized polyvinyl chloride particularly at the higher end of the range. May be filled and both filled and unfilled materials have good low temperature properties and are tough.
The material has good low-temperature toughness, stress-crack resistance, hot and resistance to UV radiation. Eva formulations are cured crosslinked normally with peroxides they have good weathering, ozone resistance and are Sulphur free. High density EVA foam sheet offers unique design capabilities. High-density EVA foam as stiff as a pretzel or as flexible as macaroni is one of the many unique design capabilities available to the design engineer.
Explore the treasure trove of possibilities for product performance. High-density EVA foam in sheets, rolls, foam tape and buns. Name required.
0コメント