Ethylene Vinyl Acetate (EVA) Hot Melt Adhesive for Kraft Paper

Adhesives Formulation

Applicable Type

Applicable Base Polymer

Applicable Industrial Sectors

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

Ingredient

Parts by weight

EVA copolymer (Elvax 250, DuPont)

xxxx

Paraffin wax (154°F AMP)

xxxx

Tackifying resin (Nevex 100, Neville Chemical)

xxx

(Source: Neville Chemical Company)

Typical Properties

Properties

Softening point, °C

Brookfield viscosity, cps

@ 135°C

xxxx

@ 150°C

xxx

@ 164°C

xxx

@ 175°C

xxx

Heat seal to Kraft paper at 67°C, 13 psi, 1 sec

xxxxxxxxxxxxxx

Peel strength, g/in width at 2”/min

xxx

Processing

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Resulting Properties

This specific formulation is for a low viscosity hot melt adhesive for bonding Kraft paper. It can be used as a heat sealable coating to paper. The adhesive is resistant to alkali, grease, and oil and shows good gloss and low vapor transmission. The adhesion is high along with a lower sealing temperature.

Tips and Tricks

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