Method of producing a very soft polyolefin spunbonded nonwoven f

Details Method of producing a very soft polyolefin spunbonded nonwoven f Method of producing a very soft polyolefin spunbonded nonwoven f

1990-08-09

1992-01-07

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

264130, 264168, 2642102, 2642108, 264282, D04H 300

Patent

active

050789350

ABSTRACT:
The polyolefin spunbonded nonwoven fabric is defined as (A) being formed of continuous polyolefin fibers having a fineness of 0.5 to 3 denier, (B) having basic weight between 30 g/m.sup.2 and 15 g/m.sup.2, and (C) having .sqroot.S.sub.MD .times.S.sub.TD of 2.5 g or below, wherein S.sub.MD and S.sub.TD are respectively the softnesses in the machine and transverse directions as measured by a handle-O-meter. The method of producing a strip of very soft polyolefin nonwoven fabric by directing polyolefin continuous fibers in a fixed direction, comprises the steps of: orienting the axes of the continuous fibers in the direction in which the continuous fibers are fed so as to form a web having a warp orientation factor (the maximum tensile strength in the direction in which the continuous fibers are fed, i.e., in a machine direction/the maximum tensile strength in a transverse direction) of 3.0 or above; and then applying wave-like crepes propagated in the machine direction to the web by creping the web.

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