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1. (WO2018162718) LINER REINFORCED BY NON-WOVEN FIBRES FOR IMPACT RESISTANT GRP PIPES

Pub. No.:    WO/2018/162718    International Application No.:    PCT/EP2018/055922
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Sat Mar 10 00:59:59 CET 2018
IPC: B29D 23/00
B29C 63/26
C09D 167/06
F16L 58/10
Applicants: FLOWTITE TECHNOLOGY AS
Inventors: HAAVALDSEN, Jane Hilary Thatcher
SYVERSEN, Kjell, Tony
Title: LINER REINFORCED BY NON-WOVEN FIBRES 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. Layer B) 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.