Schmetzklebende Verbundfasern, Verfahren zu ihrer Herstellung und daraus hergestellter schmelzgebundener Stoff oder Oberflächenmaterial

摘要

Melt-adhesive composite fibers; non-woven fabrics from the composite fibers fused at intersectional points of the fibers; and surface materials for medical supplies such as sanitary napkins and paper diapers are disclosed. The composite fibers have polypropylene as the first component and polyethylene as the second component which is continuously present on at least a part of the fiber surface along the length of the fiber; and have three-dimensional crimps of 4 to 16/inch; a filamentary denier of 1.0 to 2.0, and an apparent cut length of 20 to 40 mm. The composite fibers can be produced by extruding polypropylene and polyethylene through a spinneret for composite spinning to form unstretched composite filaments, stretching the unstretched composite filaments at a temperature 90-130 DEG C at a stretching ratio of 0.60 to 0.85 time the maximum stretching ratio, cooling the stretched filaments to a temperature below the preheating temperature, subjecting the filaments to a crimping treatment, and subjecting the filaments to an annealing at a temperature of 80-120 DEG C, but lower than 120 DEG C.