05763501 is referenced by 11 patents and cites 16 patents.

A process for the production of at least one foamed layer of polyolefins comprising: polymerizing a polyolefin elastomer (POE) or polyolefin plastomer (POP) and optionally one or more additional polyolefins with a metallocene catalyst to form a polymerized polyolefin; mixing said polymerized polyolefin, up to 100 parts by weight of a mineral filling material and from 1-10 parts by weight of a chemical propellant based on 100 parts by weight of said polymerized polyolefins to form a sheet layer mixture; rolling said sheet layer mixture on a multiroller calender to produce a sheet layer; heating at least one sheet layer at a temperature above the decomposition point of the chemical propellant so as to foam the sheet layer and form at least one foamed layer. The present invention is also concerned with new coverings which are produced according to this process.

Title
Process for the production of multi-layer constructed coverings based on polyolefins with foamed intermediate layers
Application Number
8/772258
Publication Number
5763501
Application Date
December 23, 1996
Publication Date
June 9, 1998
Inventor
Volker Hofmann
Monsheim
DE
Brigitte Rein
Ludwigshafen
DE
Norbert Mueller
Frankenthal
DE
Susanne Bickhardt
Stuttgart
DE
Agent
Foley & Lardner
Assignee
Tarkett Aktiengesellschaft
DE
IPC
B29C 64/20
B29C 43/22
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