Pipe liner bag, manufacturing method therefor and pipe repair me

Details Pipe liner bag, manufacturing method therefor and pipe repair me Pipe liner bag, manufacturing method therefor and pipe repair me

1994-04-06

1995-12-12

Bell, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

264516, 264564, 428 361, 428 363, 428212, 428213, 428240, B29D 2200

Patent

active

054748232

ABSTRACT:
A pipe liner bag is provided for reliably lining a pipe into which water may penetrate. The pipe liner bag has a double layer structure including an inner layer of a tubular nonwoven fabric made of fine yarn of three deniers or less and an outer layer of a tubular nonwoven fabric made of fat yarn of 3-15 deniers. The tubular nonwoven fabric constituting the inner layer is impregnated with highly viscous and thixotropic hardenable resin mixed with granule fillers of a small diameter, while the tubular nonwoven fabric constituting the outer layer is impregnated with hardenable resin mixed with granule filler of a large diameter. After the pipe liner bag is everted and inserted into a pipe to be repaired by fluid pressure, the hardenable resin impregnated in the pipe liner bag is cured while maintaining the internal pressure thereof constant. When this pipe liner bag is used to repair a pipe from which a branch pipe is branched off, it can be integrated with a branch pipe liner bag.

REFERENCES:
patent: 5082701 (1992-01-01), Craven et al.
patent: 5143374 (1992-09-01), Shibasaki
patent: 5328742 (1994-07-01), Tukihara
patent: 5334429 (1994-08-01), Imoto et al.

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