Method of making extruded polyethlyene pipes
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United States of America Patent
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Sep 28, 1999
Issued Date -
N/A
app pub date -
Jun 17, 1994
filing date -
Mar 17, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for the production of plastic parts, particularly pipes and sleeves, by the extrusion of a mixture of polyethylene homopolymer, copolymer or block polymer (PE) and a polymeric plasticizer reactive therewith, as well as small amounts of conventional additives, in which the moulded or extruded plastic part optionally subsequently undergoes cross-linking and stretching, or cross-linking only, in which a mixture of PE and EPDM with an average molecular weight of 1,000 to 20,000 in a weight ratio of 90 to 97% PE and 3 to 10% by weight EPDM is moulded or extruded.
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