EVA Hot Melt Adhesive for Soap Wrappers and Bands

Typical Formulation Ingredients

Ingredient

Parts by weight

EVA polymer (Elvax 250, Dupont)

xx

Microcrystalline wax (Victory Amber, Bareco)

xx

Polyterpene resin (Nirez 1083, Tenneco Chemical)

x

(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 283.)

Typical Properties

Properties

Viscosity, cps

• at 135°C

xxxxx

• at 150°C

xxxxx

• after 32 hrs at 150°C

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Softening point, °C

xx

Processing

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Resulting Properties

Packaging applications are a primary market for hot-melt adhesives which are based predominantly on EVA copolymer resins. A tackified EVA is necessary for bonding plastic substrates that have a relatively low surface energy. A starting formulation for a low cost, general purpose EVA hot melt formulation for bonding flexible packaging substrates is given in the table above. It has excellent adhesion to films and foils including waxed papers. The formulation also has good low temperature adhesion.

Tips and Tricks

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