Elastomeric waterproof laminate

Details Elastomeric waterproof laminate Elastomeric waterproof laminate

1982-11-19

1984-04-17

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

264127, 2642888, 2642902, 264DIG47, 428196, 428197, 428246, 428252, 428253, 428284, 428422, 4284231, 428910, B32B 714

Patent

active

044435118

ABSTRACT:
This invention provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article for use in, for example, material for protective articles. The waterproof and breathable polytetrafluoroethylene layered article can for example, exhibit elastomeric properties of stretch to break of 275% in the machine direction, and 145% in the transverse direction and a total stretch recovery of at least 39% after being stretched to 75% extension for 100 cycles. This invention further provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric. The waterproof and breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric is thus durable and possesses a moisture vapor transmission rate exceeding 1000 gms/m.sup.2 day, and preferably above about 2000 gms/m.sup.2 day.

REFERENCES:
patent: 3953566 (1976-04-01), Gore
patent: 4194041 (1980-03-01), Gore et al.
patent: 4277429 (1981-07-01), Okita

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