Pipe liner bag and manufacturing methods therefor

Details Pipe liner bag and manufacturing methods therefor Pipe liner bag and manufacturing methods therefor

1998-02-24

2000-03-28

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 94, 156148, 156294, 1563044, 138 98, B32B 502, B32B 3112

Patent

active

060426683

ABSTRACT:
A pipe liner bag is provided with improved anti-peeling and anti-bursting properties by ensuring a high anti-peeling strength of the plastic film to be employed. The pipe liner bag has a tubular resin absorbent material, the outer surface of which is coated with a highly air-tight plastic film, and a hardenable resin impregnated in the tubular resin absorbent material. The tubular resin absorbent material is formed of tubular unwoven fabric subjected to the needle punching processing, where a side of the tubular unwoven fabric having stuck-out needles protruding therefrom is exposed to the outside to serve as an outer surface of the tubular resin absorbent material. The outer surface is coated with a plastic film.

REFERENCES:
patent: 3819465 (1974-06-01), Parsons et al.
patent: 4009063 (1977-02-01), Wood
patent: 4446181 (1984-05-01), Wood
patent: 4600615 (1986-07-01), Hyodo et al.
patent: 5698056 (1997-12-01), Kamiyama et al.

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