Extrusion coating method with polyolefin foam

Details Extrusion coating method with polyolefin foam Extrusion coating method with polyolefin foam

1977-06-20

1979-03-27

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 459, 264173, 264DIG5, 264DIG14, B29D 2700

Patent

active

041465628

ABSTRACT:
Disclosed is a method for continuous extrusion coating of a hollow core material with a highly expanded polyolefin resin, which is characterized by subjecting an extruded molten mass of an expandable polyolefin resin to external cooling at the point at which said molten mass begins to foam and supplying said hollow core material with the surface temperature thereof kept below the softening point of said polyolefin resin for thereby enhancing the fastness of adhesion of the highly expanded polyolefin foam with the hollow core material and at the same time facilitating the release of the two materials thus joined.

REFERENCES:
patent: 2994327 (1961-08-01), Otto et al.
patent: 3029476 (1962-04-01), Merck et al.
patent: 3030623 (1962-04-01), Lehti et al.
patent: 3222722 (1965-12-01), Reifenhauser
patent: 3528458 (1970-09-01), Gaeckel
patent: 3764642 (1973-10-01), Boutillier
patent: 3790436 (1974-02-01), Graham et al.
patent: 3860686 (1975-01-01), Myers
patent: 3922328 (1975-11-01), Johnson
"Wire and Cable Coaters' Handbook" First Edition, Wilmington, Del., E. I. Du Pont de Nemours and Co., Inc., .COPYRGT.1968, pp. 18-23.

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