Liquid permeable thermoplastic films

Details Liquid permeable thermoplastic films Liquid permeable thermoplastic films

1988-07-06

1990-01-23

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428178, 428192, 264504, 264544, 264553, 264554, B32B 310

Patent

active

048957496

ABSTRACT:
Thermoplastic film, permeable to liquids, used particularly as a covering film for absorbent material, whose openings are formed as projections on one side only of the film, and having its narrowest cross-section in a plane different from that of the smooth side of the film. The cross-section of the opening widens on passing from its narrowest point towards the free edge of the projection on film. The free edge of the projection can be irregularly lobed or wrinkled.

REFERENCES:
patent: 2234842 (1941-03-01), Jordan
patent: 3929135 (1975-12-01), Thompson
patent: 4276336 (1981-06-01), Sabee
patent: 4552709 (1985-11-01), Koger et al.

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