Microperforated strength film for use as an anti-infiltration ba

Details Microperforated strength film for use as an anti-infiltration ba Microperforated strength film for use as an anti-infiltration ba

1997-02-18

1999-03-30

Watkins, III, William P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428137, 428131, 428105, 428182, 428220, 428913, 428338, 52408, 527461, 83 30, 83347, 156250, 156209, 156252, 156253, 156164, 15624418, 15624419, E04B 272, B32B 324

Patent

active

058886141

ABSTRACT:
A house wrap film product includes a laminated poly film with a first poly film ply and a second poly film ply and micropuncture formed in the laminated poly film to allow vapor transmission from a first side of the laminated poly film to a second side of the laminated poly film. Each of the poly plies is formed of a spiral cut film having a first ply with a first orientation and a second ply having a second orientation, the first orientation being at an angle with respect to an edge of said film and said second orientation being at an angle with respect to an edge of said film, said first ply and said second ply being laminated together cross oriented such that said first orientation extends in a different direction from said second orientation. The micropuncture provides a deformed region of said film, surrounding said hole. A method is provided for forming the house wrap product.

REFERENCES:
patent: 3604302 (1971-09-01), Smythe
patent: 3682028 (1972-08-01), Clayton et al.
patent: 3779285 (1973-12-01), Sinibaldo
patent: 4039364 (1977-08-01), Rasmussen
patent: 4653363 (1987-03-01), Lang
patent: 4898761 (1990-02-01), Dunaway et al.
patent: 5554246 (1996-09-01), Anwyll, Jr.

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