In the field of chemistry and organic chemical engineering, EVA refers to "ethylene-vinyl acetate copolymer" and its rubber-plastic foaming material, with the molecular formula of (C2H4)x.(C4H6O2)y, which is used to make refrigerator pipes, gas pipes, civil engineering boards, containers and daily necessities.
Basic information
Chemical name: ethylene-vinyl acetate copolymer
English name of chemical: ethylene-vinyl acetate copolymer
English abbreviation: EVA
Molecular formula: (C2H4) X. (C4H6O2) Y.
Extended data:
use
It can be used to make refrigerator pipes, gas pipes, civil plates, containers and daily necessities, and can also be used as packaging films, gaskets, medical devices, hot melt adhesives, cable insulation layers and so on. At present, it is used in the solar cell industry to bond the cell sheet in the crystalline silicon cell with the surface photovoltaic glass and the back plate of the cell.
Content and performance
The performance of EVA is closely related to the content of vinyl acetate (VA). When the content of VA increases, its resilience, flexibility, adhesion, transparency, solubility, stress cracking resistance and impact properties will all be improved.
When the content of VA decreases, the rigidity, wear resistance and electrical insulation of EVA will be improved. Generally speaking, when the VA content is in the range of 10%~20%, it is a plastic material, while when the VA content exceeds 30%, it is an elastic material.
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