EVA Fast Setting Assembly Carton and Case Sealing Adhesive

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

A

Tackifier (Zonester 85 polyterpene resin, Arizona Chemical)

xx

A

EVA copolymer (Elvax 210, DuPont)

xx

A

EVA copolymer (Elvax 240, DuPont)

xx

A

Paraffin wax (Shellwax 700, Shell Oil Company)

xx

A

Polyethylene resin (Epolene N-14, Westlake)

x

A

Thermoplastic Rubber (Kraton 1102, Kraton)

x

A

Butylated hydroxytoluene

xxx

Typical Properties

Properties

Brookfield viscosity, cps, @ 177°C

xxxx

Ten minute bond shear temperature (100 g/in), °C

xx

Sealing temperature range, °C

xxxxxxx

T-peel strength (Kraft to Kraft), oz/in

xx

Breaking strength, psi

xxx

Elongation at break, %

xxx

Processing

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Resulting Properties

It is an EVA hot melt formulation commonly used for food. 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.

This specific adhesive is noted for low viscosity and fast assembly as well as for its excellent hot tack, odor, and color. It:

Has good adhesion to a variety of packaging films and
Can be applied over most wax based carton coatings, providing an excellent seal

A formulation from Flick, E.W., Adhesive and Sealant Compound Formulations, Noyes Publications, 1984, p. 270

Tips and Tricks

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