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What Is EVA Hot Melt Adhesive?

Published on Mar. 08, 2019

EVA Hot Melt Adhesive is a plastic material composed of ethylene (E) and vinyl acetate (VA). The ratio of these two chemicals can be adjusted to meet different application needs. The higher the content of vinyl acetate (VA content), the higher the transparency, softness and toughness. Ethylene/vinyl acetate copolymer (EVA), EVA hot melt adhesive is a polymer that does not require solvent, water content, and 100% solid fusibility. It is solid at room temperature and melts to a certain extent. A liquid adhesive that is fluid and has a certain viscosity, which is a light brown translucent body or white after melting. The main component of the Hot Melt Adhesive , that is, the basic resin is a copolymer of ethylene and vinyl acetate under high pressure, and is further formulated with a tackifier, a viscosity modifier, an antioxidant, etc. to form a hot melt adhesive.

Ethylene-vinyl acetate copolymer (also known as ethylene-vinyl acetate copolymer) is obtained by copolymerization of ethylene (E) and vinyl acetate (VA), English name; Ethylene Viny Acetate, referred to as EVA, or E/ The VAC. polymerization process uses high pressure bulk polymerization (for plastics) and solution polymerization (PVC processing aids). Emulsion polymerization (binder), suspension polymerization. The ethylene acetate (VA) content of more than 30% is emulsion polymerization, and the low vinyl acetate content is polymerized by high pressure. EVA is very versatile. In general, EVA with a vinyl acetate content of less than 5% is mainly used for film, wire and cable LDPE modifiers, adhesives, etc.; EVA products with a vinyl acetate content of 5%-10% are elastic films; EVA in the range of 20%-28%, mainly used in hot melt adhesives and coated products; vinyl acetate in 5%-45%, the main products are film (including agricultural film) and sheet, injection molding, molded products , foamed products, hot melt adhesives, etc. It is widely used in foaming shoe materials, functional shed film, packaging mold, hot melt adhesive, wire and cable and toys.

EVA Hot Melt Adhesive