초록 ▼

A foamed polyethylene product has an outer sheath of non-foamed polyethylene fused to an underlying foamed body portion. Preferably, the product is produced in an in-line method when the foam body is extruded and subsequently the skin is extruded directly on the body portion. This process only cause

A foamed polyethylene product has an outer sheath of non-foamed polyethylene fused to an underlying foamed body portion. Preferably, the product is produced in an in-line method when the foam body is extruded and subsequently the skin is extruded directly on the body portion. This process only causes limited thermal degradation of an outer layer of the body portion which improves adhesion of the skin to the body portion.

대표청구항 ▼

[ I claim:] [12.]12. A method of manufacturing a foamed plastic member extruded along an axial length thereof and having an outer skin comprising: extruding a foamed plastic core of a desired cross-section along an axial length thereof; and applying a thermal plastic skin coaxially around said foame

[ I claim:] [12.]12. A method of manufacturing a foamed plastic member extruded along an axial length thereof and having an outer skin comprising: extruding a foamed plastic core of a desired cross-section along an axial length thereof; and applying a thermal plastic skin coaxially around said foamed plastic portion to heat seal said skin to said foamed plastic core; said skin supported by said extruded foamed plastic core wherein the skin thickness is about 0.003 inches.