Process for producing a foamed base material for car ceiling mem

Details Process for producing a foamed base material for car ceiling mem Process for producing a foamed base material for car ceiling mem

1987-09-01

1989-03-07

Anderson, Philip

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156198, 15624413, 15624424, 264 461, 264 53, B29C 6722, B29C 4706, B29C 4720, B32B 518

Patent

active

048103160

ABSTRACT:
A thermoplastic resin having a Vicat softening point of 115.degree. C. or higher and containing a blowing agent is extruded and foamed into a foamed tubular body. The foamed tubular body is subjected to biaxial orientation and then pressed in antipodal directions, whereby the foamed tubular body is flattened and fusion-bonded at the resultant mutually-opposing inner walls thereof to obtain a foamed base material suitable for use in the fabrication of a car ceiling member. The foamed base material has not only excellent mechanical strength but also superb thermal strength. The foamed base material is not required to laminate films, sheets or the like thereon and is hence provided at a low cost.

REFERENCES:
patent: 3121911 (1964-02-01), Lightner
patent: 3194864 (1965-07-01), Richie
patent: 3248462 (1966-04-01), Merrill et al.
patent: 3790436 (1974-02-01), Graham, Jr. et al.
patent: 3804684 (1974-04-01), Tokushige et al.
patent: 4256797 (1981-03-01), Stamper

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