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Adhesives Ingredients
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Adhesives Ingredients

EVA Bookbinding HMA Resistant to Cold Cracking

Adhesives Formulation

Applicable Type
Hot-melt Adhesives
Applicable Base Polymer
Ethylene Vinyl Acetates (EVA)
Applicable Industrial Sectors
Bookbinding / graphic art

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. EVA adhesives demonstrate strong adhesive properties, but most importantly they set quickly by virtue of their hot melt character.

Typical Formulation Ingredients

Phase
Ingredient
Parts by weight
A 
Ethylene vinyl acetate copolymer (28% vinyl acetate and melt index of 6) 
xxxx 
A 
Polyterpene tackifier (Zonarez B-100 rosin ester, Arizona Chemical Company) 
xxxx 
A 
Tall oil resin (Actinol R Type 3A, Arizona Chemical Company) 
xxxx 
A 
Microcrystalline wax (145°F melting point) 
xxx 

Typical Properties

Properties
Sealing temperature, °C 
xxx 
Brookfield viscosity @ 177°C, cps 
xxxx 
Adhesion, Kraft to Kraft, oz / in 
xx 
Tensile strength, psi 
xxx 
Elongation at break, % 
xxx 

Processing

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Resulting Properties

Bookbinding applicationns are a primary market for hot-melt adhesives which are based predominantly on EVA copolymer resins. A tackified EVA is necessary for bonding substrates that have a relatively low surface energy. A starting formulation for a low cost, general purpose EVA hot melt formulation for bookbinding is given in the table above. This formulation has the following properties:

  • Excellent flexibility
  • Very strong adhesive bonding characteristics
  • Provides the necessary mechanical properties for bookbinding applications
  • Excellent compatibility
  • Elongation greater than 100%

    • (Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 247.)

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