Introduction of Tie Layers in Coextrusion, 1999 Polymers, Laminations & Coatings Conference Proceedings
Dean A. Zimmerman, Ph.D.
Application Development Specialist
Equistar Chemicals, LP
Cincinnati, OH 45249
The use of anhydride modified resins as tie-layers in coextruded multilayer applications is discussed. Tie-layer
resins are used to adhere two resins that otherwise would have poor adhesion. A review of the factors effecting adhesion and how they relate to tie-layer performance is discussed. Methods for evaluating tie-layers are discussed including testing methods and guidelines. Processing guidelines for extrudable adhesives are provided.