Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Ethylene vinyl acetate copolymer resin (Elvax 250, DuPont)
A
Tackifier (Staybelite Ester 10, Eastman Chemical)
Typical Properties
Viscosity, cps, at 149° C
Viscosity, cps, at 177° C
Viscosity, cps Aged 32 hrs at 149°C, measured at 149°C
Needle penetration at 38°C, ASTM D1321
Resulting Properties
EVA Hot Melt Adhesive for Carton Sealing is commonly used for cartons and folding boxes is given in the table above. 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 formulation listed above has been found to provide:
- Excellent tack
- Very fast set-up time
- Good adhesion to cellophane, paper, aluminum, and many other packaging films
- Poor adhesion to polypropylene
- Recommended for use as a pre-applied carton adhesive or for closing packages on a carton closing machine.
The Source of this formulation is Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 266