Composite substrate

Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture

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Details

156176, 156253, 156290, 1563084, 1563096, 428138, 428198, 428286, 428287, 428339, 604366, B32B 310, B32B 710, B32B 3120

Patent

active

047269766

ABSTRACT:
A composite substrate for use as a coversheet on disposable articles such as disposable diapers, sanitary napkins, disposable bed pads, nursing pads, finger dressings, and incontinent diapers, or the like. The cover sheet comprises an inner layer of polyethylene thermoplastic film secured to and between the inner surfaces of a top layer and a bottom layer of nonwoven polypropylene fibrous webs, by means of a pair of, one of which being a heated embossed roll applied to at least one of the outer surfaces of the fibrous web. The heat from the heated roll causes the film to melt in discrete areas forming apertures therein without substantially affecting the fibrous webs. As the film melts, it contacts fibers in the substantially unaffected adjacent fibrous web layers, causing the film and webs to be secured to each other at least at the peripheral edges of the discrete apertured areas, leaving a matrix of fibers covering the apertured areas.

REFERENCES:
patent: 3292619 (1966-12-01), Egler
patent: 3331728 (1967-07-01), Lane
patent: 3622422 (1971-11-01), Newman
patent: 3660200 (1972-05-01), Anderson
patent: 3676242 (1972-07-01), Prentice
patent: 4115176 (1978-09-01), Ekstrand
patent: 4379192 (1983-04-01), Wahlquist et al.
patent: 4522203 (1985-06-01), Mays

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