Multi-component coextrusion

摘要: A multi-component composite extrusion includes various combinations of a hollow, high density profile filled in with foamed, thermoplastic core. further low foamed can alternately surround the density, hollow component. capstock be provided on either embodiment extrusion. All components are preferably substantially simultaneously extruded single multi-plate die, so that laterally coextensive one another and molecularly bonded to adjacent The thin wall, component may optionally substantial wood fiber content alter macroscopic properties resulting has utility fenestration, decking, remodeling industries. method disclosed for making permits designer vary type material used respect each presence or absence entire extrusion, surface characteristics weatherability