Biaxially oriented nonwoven fabric having long and short fibers

Details Biaxially oriented nonwoven fabric having long and short fibers Biaxially oriented nonwoven fabric having long and short fibers

1975-12-19

1977-04-05

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

428114, 428213, 428218, 428167, 428171, B32B 512

Patent

active

040163199

ABSTRACT:
A nonwoven fabric having alternating stripes of high fiber density and low fiber density has fibers of at least one-half inch in length and fibers of less than one-half inch in length, preferably under one-fourth inch in length. The fabric is made in such a manner as to produce parallel twistless ribbon strands in the high fiber density areas containing both short and long fibers. The twistless ribbon strands are bridged together by the long fibers so as to form the nonwoven fabric. A majority of the bridging long fibers have at least a portion of their length included in adjacent twistless ribbon strands; said ribbon strands having at least one strand width space between said ribbon strands. A majority of said short fibers are disposed in said high fiber density areas together with a majority of said long fibers, both being oriented in substantially one direction, for example, the machine direction, while substantially all of the long fibers in the adjacent and bridging low fiber density areas are oriented in a direction substantially normal to that direction.

REFERENCES:
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: 3969561 (1976-07-01), Marshall

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