Ethylene vinyl acetate (EVA) is a polyethylene copolymer that is chemically similar to PE and is similar in softness and flexibility to elastomeric materials but similar to thermoplastic materials, except that EVA has some Vinyl acetate (VA) is a branch or branch. Usually between 5 and 20% VA is added to the PE depending on the properties. VA causes adhesion or polarity of the polymer, which leads to greater compatibility of the polymer with fillers and also enhances the adhesion properties of the adhesive.