Products, processes and use

Details Products, processes and use Products, processes and use

1983-04-21

1989-09-05

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428137, 4283044, A61L 1506, C08J 518

Patent

active

048637785

ABSTRACT:
The present invention is directed to an elastic apertured film which contains voids. The film comprises a blend of polyurethane and an incompatible polymer which forms a discrete phase within the matrix of polyurethane. The film is in the form of a net. The area of apertures is 5 to 75% of the total area of the film or alternatively, the film is in the form of an interrupted film containing a pattern of holes which have a maximum dimension of not more than 3 times the thickness of the film.

REFERENCES:
patent: 2096564 (1937-10-01), Scholl
patent: 2115122 (1938-04-01), Prudden
patent: 3486968 (1969-12-01), Mater
patent: 3543750 (1970-12-01), Meizanis
patent: 4133310 (1979-01-01), Lloyd et al.
patent: 4135023 (1979-01-01), Lloyd et al.
patent: 4140826 (1979-02-01), Liu
patent: 4370981 (1983-02-01), Sanderson

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