Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-12-23
1998-06-09
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
264 451, 264 458, 264 463, 264 53, 264 54, 264 55, 4283044, 521143, B29C 4322, B29C 6420
Patent
active
057635013
ABSTRACT:
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.
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Bickhardt Susanne
Hofmann Volker
Mueller Norbert
Rein Brigitte
Foelak Morton
Tarkett Aktiengesellschaft
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