Document Type and Number:
Japanese Patent JPH0261379
Kind Code:
B2
Abstract:
What is disclosed is a method for making a gastight multiple-walled panel of extruded resin from an integrally extruded hollow panel comprising two parallel, plane outer walls having supporting partitions disposed between them and defining long hollow cells with open end faces, which method comprises heating the hollow panel at least in the area of the open end faces of said hollow cells until the resin is in the thermoplastic state, and then heat sealing the two outer walls in the thermoplastic area thereof in a gastight manner either to each other or to a tape of a further thermoplastic material covering the end faces, the seal so produced being held for at least 1 minute at a temperature ranging from 10 DEG C. beneath the Vicat softening point to 20 DEG C. above the Vicat softening point of the resin.
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Inventors:
KURAUSU KORUBE
UARUTAA HERUMAN
OTOMAARU KURAIEKU
HARUTOMUUTO SHIKOFUSUKII
HAINTSU FUETSUTAA
UARUTAA HERUMAN
OTOMAARU KURAIEKU
HARUTOMUUTO SHIKOFUSUKII
HAINTSU FUETSUTAA
Application Number:
JP22783882A
Publication Date:
December 19, 1990
Filing Date:
December 28, 1982
Export Citation:
Assignee:
ROEHM GMBH
International Classes:
B29C48/11; B29C53/00; B29C57/10; B29C65/00; B29C65/02; B29C65/14; B29C65/18; B29C67/00; B29C35/08; B29C48/12; B29C57/00; B29L24/00
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