Extrusion of Self Reinforced Thermoplastic Composites:Illustrated with High Density Polyethylene.

摘要

A method is described for solid state coextrusion of self-reinforced and transparent composites of high density polyethylene composed of core and sheath phases. The high density polyethylenes are coextruded below their melting points. The cocylindrical composites have a high tensile modulus and strength, a high orientation for both core and sheath components and possess considerable resistance to core/sheath separation. This resistance to pull out due to compressive and radial stresses developed during the composite coextrusion and not to bonding by epitxial crystallization. (Author)