In the field of chemistry and organic chemical industry, EVA refers to “ethylene-vinyl acetate copolymer” and its rubber-plastic foaming material, with the molecular formula (C2H4) x. (C4H6O2) y, used to make refrigerator ducts, gas pipes, Civil construction boards, containers and daily necessities.
It is a solid at normal temperature, and it can be melted by heating to a certain degree and become a liquid with a certain viscosity.
EVA rubber and plastic products are new environmentally friendly plastic foaming materials, which have the advantages of good cushioning, shock resistance, heat insulation, moisture resistance, chemical resistance, bacteria resistance and water resistance, and are non-toxic and non-absorbent.
The performance of EVA has a great relationship with the content of vinyl acetate (VA). When the content of VA increases, its resilience, flexibility, adhesion, transparency, solubility, stress crack resistance and impact performance will all Increase; when the content of VA decreases, the rigidity, abrasion resistance and electrical insulation of EVA will increase. Generally speaking, when the VA content is in the range of 10% to 20%, it is a plastic material, and when the VA content exceeds 30%, it is an elastic material.
In order to make refrigerator ducts, gas pipes, civil plates, containers and daily necessities, it can also make packaging films, gaskets, medical equipment, and can also be used as hot-melt adhesives, cable insulation layers, etc.