Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Polyamide resin (Versamid 900, Cognis)
A
Polyamide resin (Versamid 100, Cognis)
Typical Properties
Excellent metal-to-metal thermoplastic adhesive and caulking compound
Extremely tough and resistant to impact
Effectively joins plastics, foils, and papers
Resulting Properties
Polyamide hot melt adhesives have better heat resistance than EVA or SBC types and use fewer additives. Certain types of polyamide hot melts can withstand 200°C over the short term without degradation, although creep is generally a problem. Polyamide adhesives generally exhibit sufficient properties, such as tack, without the use of additives. However, the base polyamide resin generally costs more than more conventional hot melt resins that rely on formulation for optimum performance. It is important to minimize the time when the molten resin is exposed to oxygen.
(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 251)