Very soft polyolefin spunbonded nonwoven fabric

Details Very soft polyolefin spunbonded nonwoven fabric Very soft polyolefin spunbonded nonwoven fabric

1987-09-29

1989-03-07

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428224, 428284, 428296, 428297, 428340, 428913, D04H 104

Patent

active

048105562

ABSTRACT:
Disclosed are a very soft polyolefin spunbonded nonwoven fabric and its production method. The polyolefin spunbonded nonwoven fabric according to the present invention 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.

REFERENCES:
patent: 4342807 (1982-08-01), Rosen et al.
patent: 4434204 (1984-02-01), Hartman et al.
patent: 4626467 (1986-12-01), Hostetter
patent: 4644045 (1987-02-01), Fowells
patent: 4748065 (1988-05-01), Tanikella
patent: 4766029 (1988-08-01), Brock et al.

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