Ultra fine calcium carbonate Omyabond 120

General Purpose Ethylene Vinyl Acetate/Polyterpene HMA

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Ethylene Vinyl Acetates (EVA)

Applicable Industrial Sectors

Papers & Packagings , Wood & Related Industries

Applicable Base Polymer Properties

Hot melt EVAs are made from a combination of solid thermoplastic copolymers, tackifying resins, and waxes that function with the right viscosity when applied in the bookbinding operations. EVA adhesives demonstrate strong adhesive properties, but most importantly they set quickly by virtue of their hot melt character.

EVA resins are considered to be relatively safe to use in food applications. Certain adhesive manufacturers offer EVA resins that are approved for indirect food contact (FDA 21 CFR.175) applications.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Ethylene vinyl acetate copolymer (Elvax 260, DuPont)

Paraffin wax, 63°C mp

Polyterpene tackifier resin (Wingtack 95, Cray Valley)

Processing

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Resulting Properties

General Purpose Ethylene Vinyl Acetate / Polyterpene HMA formulation is for a general purpose product assembly adhesive with high adhesion. It is claimed to be a very compatible formulation with high strength and elongation. It shows excellent thermal stability in the tank and low odor.

Typical Formulation Properties:

Good hot tack and weathability
Excellent shear and peel adhesion properties
Low volatility
Viscosity stable under prolonged heating

Source: Flick, E.W., Adhesive and Sealant Compound Formulations, Noyes Publications, 1984, p. 234

Tips and Tricks

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