Polymeric films

Details Polymeric films Polymeric films

1989-04-21

1990-09-04

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428290, 4284235, 4284246, 4284244, 4284242, 4284758, 4284761, 428516, 428518, B32B 2740, B32B 2732, D04H 108

Patent

active

049543938

ABSTRACT:
This invention provides multilayer polymeric films including a layer of nylon polymer having a Vicat A(DIN 53460) softening point of not more than 170.degree. C. and being substantially impermeable to styrene, and a layer of a weldable synthetic plastics composition bonded to the layer of the nylon polymer. Such films can be used to recondition pipes, for example sewer pipes. They have the advantage of being resistant to swelling by synthetic resin compositions, particularly styrene, used to impregnate a fibrous mat which is bonded to the film when used to recondition pipes. In addition, the films have shown resistance to puncturing.

REFERENCES:
patent: 4361628 (1982-11-01), Krueger et al.
patent: 4758454 (1988-07-01), Wood

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