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1. (WO2002007969) SINGLELAYER AND MULTILAYER POLYOLEFIN FOAM PIPES

Pub. No.:    WO/2002/007969    International Application No.:    PCT/EP2001/007914
Publication Date: Jan 31, 2002 International Filing Date: Jul 10, 2001
IPC: B32B 5/18
B32B 15/08
B32B 27/32
C08L 23/12
C08L 23/14
C08L 51/06
C08L 53/00
F16L 59/02
F16L 59/14
Applicants: BOREALIS GMBH
HESSE, Achim
LINDSTRÖM, Tony
EK, Carl-Gustaf
RYDIN, Cecilia
Inventors: HESSE, Achim
LINDSTRÖM, Tony
EK, Carl-Gustaf
RYDIN, Cecilia
Title: SINGLELAYER AND MULTILAYER POLYOLEFIN FOAM PIPES
Abstract:
Singlelayer and multilayer polyolefin foam pipes with improved compression resistance have a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour of propylene homopolymers with a stereospecifity index > 98 % or propylene copolymers with a stereospecifity index of the homopolymer matrix of > 96 %. The polyolefin foam pipes are coated steel pipes for transporting crude oil or gas products or district heating applications, singlelayer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.