Energy savings plus mechanical reinforcement and rheology control

EVA Hot Melt Adhesive with Wide Temperature Range for Cellulosics (Comparison 3)

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Ethylene Vinyl Acetates (EVA)

Applicable Industrial Sectors

Papers & Packagings

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 alpha olefin copolymers

Typical Properties

Properties

Heat stress (24 hrs), 100 gm load at 57° C

xxxx

Adhesion (average fiber tear) at 54° C %

Adhesion (average fiber tear) at-7° C %

Adhesion (average fiber tear) at-29° C %

Processing

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Resulting Properties

EVA Hot Melt Adhesive with Wide Temperature Range for Cellulosics (Comparison 3) is a low viscosity hot melt adhesive to be used in bonding Kraft paper. The adhesive has a wide temperature range. The preferred formulation comprises a polymer mixture of an ethylene vinyl acetate polymer with low vinyl acetate content and a functionalized metallocene catalyzed polyethylene copolymer. The hot melt adhesive has wide service temperature range for bonding cellulosic substrates together. The adhesive is well suited for case, tray, carton and bag sealing applications. As demonstrated in the above tables, the adhesive based on EVA with low vinyl acetate and functionalized ethylene alpha olefin copolymers passed the heat stress test at 63°C and has high average fiber tear percentage at low temperatures. The source of this formulation is : WO2014/158396

Tips and Tricks

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