Multilayer plastic pipe with polyamide inner and outer layers an

Details Multilayer plastic pipe with polyamide inner and outer layers an Multilayer plastic pipe with polyamide inner and outer layers an

1992-11-10

1995-06-20

Thibodeau, Paul J.

Pipes and tubular conduits

Flexible

Distinct layers

428 357, 428 369, 428 3691, 4284744, 4284752, 138174, B32B 3300

Patent

active

054258170

ABSTRACT:
A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, and resistance to mechanical stress, is provided comprising:
an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, and
at least one intermediate layer comprising a linear, crystalline polyester-based molding composition interposed between and bonding together the inner and outer layers.

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patent: 4443519 (1984-04-01), Donermeyer et al.
patent: 4528219 (1985-07-01), Yamada et al.
patent: 4656242 (1987-04-01), Swan et al.
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patent: 4855181 (1989-08-01), Shimo et al.
patent: 4948016 (1990-08-01), Summons et al.
patent: 5108844 (1992-04-01), Blemberg et al.
Database WPIL, Derwent Publications Ltd., AN 92-320031, JP-A-224 384, Aug. 13, 1992.

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