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1. (WO2017153530) LINER FOR IMPACT RESISTANT GRP PIPES

Pub. No.:    WO/2017/153530    International Application No.:    PCT/EP2017/055565
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Mar 10 00:59:59 CET 2017
IPC: B29D 23/00
B29C 47/00
B29C 63/26
B29C 63/34
B32B 1/08
C09D 167/06
C09D 167/08
F16L 58/10
Applicants: AMIBLU TECHNOLOGY AS
Inventors: HAAVALDSEN, Jane Hilary Thatcher
SYVERSEN, Kjell Tony Hoen
Title: LINER FOR IMPACT RESISTANT GRP PIPES
Abstract:
The invention relates to a glass-reinforced plastic pipe liner of improved impact performance comprising layer B) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by non-woven fibres and a layer C) from unsaturated polyester resin, optionally mixed with vinyl ester resin reinforced by chopped fibre strands. At least one of these layers B) or C) comprises colour pigments at 0.2 –5.0 wt%. The invention provides flexible liners for pressure and non-pressure GRP pipes. It improves impact performance of the pipe liner whilst offering also improvements in abrasion resistance, water-jet resistance for high pressure cleaning without liner damage, increased expected lifetime by improved resistance to internal pressure and permits pigmentation of the liner. The invention also encloses a process for producing the glass-reinforced plastic pipe liner.