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Formulating Ethylene Vinyl Acetate Hot Melt Adhesives

SpecialChem / Jan 10, 2007

Hot melt adhesives are increasingly becoming popular because of their fast setting speed, relatively low cost (materials and processing), and low environmental impact. Hot melt adhesive systems also have broad formulation latitude so that a multiplicity of products can be produced for specific end-uses and substrates. Primary hot melt applications are high-speed applications such as packaging, attaching labels and wood veneer, bookbinding, and textiles. Hot melt adhesives can also be manufactured in various forms including pellets, slugs, and blocks for bulk application or stick and continuous rope forms for heated gun applicators. Films are also available for high area assembly and continuous laminating. Hot melt adhesives are primarily made from thermoplastic polymers including ethylene vinyl acetate (EVA), block copolymers such as styrene butadiene styrene (SBS) or styrene isoprene styrene (SIS), polypropylene (atactic), polyethylene, polyamide, polyester, and polyurethane. Of these, EVA is the most popular due to their high versatility.

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