Eva Vinyl Acetate Content
There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.
Eva vinyl acetate content. Eva with low melt index mi offers high strength superior viscosity and hot tack relative melting. The vinyl acetate content in eva resin varies from 0 2 to 40 whereas in the high density eva the va can be more than 50. Resins range in vinyl acetate content from 7 5 to 33 wt. The eva copolymer which is based on a low proportion of va approximately up to 4 may be referred to as vinyl acetate modified polyethylene.
Search results for vinyl acetate at sigma aldrich advanced search structure search cert of analysis sds search sigma aldrich products analytical chromatography standards reference. In particular va percentage is related to the crystalline fraction that decreases by enhancing the comonomer content and. 150 150 25 45 55 chemical basis ethylene vinyl acetate ethylene vinyl acetate density. Ethylene vinyl acetate eva mg al layered double hydroxide ldh nanocomposites using eva of different vinyl acetate contents eva 18 and eva 45 have been prepared by solution blending method.
3 vinyl acetate content melt flow rate and va content are the main properties of eva copolymers. Eva eva eva eva eva melting range c dsc 75 79 65 69 59 65 59 65 55 59 melting viscosity g mfi 190 c 2 16 kg 10 min. Bromine adds to give the dibromide.
Some grades are available with. Vinyl acetate undergoes many of the reactions anticipated for an alkene and an ester. Ethylene vinyl acetate copolymer eva is a copolymer of ethylene and vinyl acetate as shown in fig.