Apertured nonwoven webs

Details Apertured nonwoven webs Apertured nonwoven webs

1973-05-14

1976-04-06

Ansher, Harold

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428194, 428198, 428212, 428229, 428265, 428296, 428910, B32B 310, B32B 2702, D04H 154

Patent

active

039491277

ABSTRACT:
Webs having a desirable combination of strength and fabric-like characteristics can be prepared by ultrasonically induced fusion of a web of unbonded, molecularly oriented thermoplastic fibers at intermittent regions and in a manner such that the intensity of fusion in the individual intermittent regions diminishes from the center of the regions to their edges. On subsequently stretching, those areas of the regions which are most intensively fused break apart to form the perforations in the web.

REFERENCES:
patent: 3104998 (1963-09-01), Gelpke
patent: 3510389 (1970-05-01), Olson
patent: 3525653 (1970-08-01), Manock
patent: 3542634 (1970-11-01), Such et al.
patent: 3679535 (1972-07-01), Kalwaites
patent: 3679536 (1972-07-01), Kalwaites
patent: 3681182 (1972-08-01), Kalwaites
patent: 3681184 (1972-08-01), Kalwaites
patent: 3781183 (1973-12-01), Doll
patent: 3855045 (1974-12-01), Brock
patent: 3855046 (1974-12-01), Hansen et al.

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