Process for producing non-woven fabrics of ultrafine polyolefin fibers
AssigneeChisso Corporation
InventorMasaru Nishijima
Life of this patent
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Abstract
A process for producing a non-woven fabric of ultrafine polyolefin fibers by subjecting a web of splittable conjugate polyolefin fibers to a water needle processing, and non-woven fabric thus obtained are described. The polyolefin composite fibers, contain 1.0 to 7.0% by weight of a hydrophilic component blended therein. The non-woven fabrics include ultrafine fibers having a size of 0.5 denier or less and a non-circular cross-section. Splitting and peeling off of the conjugate fibers and generation of static electricity with the composite fibers at a carding step is suppressed. The non-woven fabrics have an excellent wiping property, softness, and hydrophilic property.
Claims2
A process for producing a non-woven fabric which comprises the following steps of:
- providing at least two different kinds of polyolefin resins, at least one of which comprises from 1.0% to 7.0% by weight of a hydrophilic component selected from the group consisting of a fatty acid glyceride, alkoxylated alkyl phenol, and polyoxyalkylene fatty acid ester;
- composite spinning said two different kinds of polyolefins through a spinneret for splittable composite fibers to obtain splittable composite fibers;
- stretching said composite fibers;
- subjecting said stretched composite fibers to crimp with a crimper;
- cutting the crimped fibers to obtain staple fibers;
- carding said staple fibers to form a web;
- and,
- subjecting said web to water needle processing at a water pressure of 60 kg/cm.sup.2 or more to obtain a non-woven fabric.
Dependencies are inferred from the claim text.