Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Ethylene vinyl acetate copolymer resin (28% vinyl acetate, melt index of 25)
A
Microcrystalline wax (190°F to 195°F melting point)
A
Tackifier (Zonarez B-125, Talas)
Typical Properties
Brookfield viscosity@350°C, cps
Brookfield viscosity@390°C, cps
Kraft to Kraft Adhesion oz / inch
Kraft to Polyethylene Adhesion oz / inch
Kraft to Aluminum Foil Adhesion oz / inch
Resulting Properties
A starting formulation for a general purpose, EVA hot melt adhesive formulation for bonding difficult substrates (e.g., polyethylene and polypropylene) is given in the table above. The adhesive is stable at high temperatures. It will adhere to most packaging foils and films, including polypropylene. It has increased tackiness and heat sealable properties.
(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 259.)