| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyolefin-based splittable type conjugated fiber highly split even by relatively weak impact force such as high-pressure liquid flow jet and excellent in processability and obtain a nonwoven fabric suitable for uses of wipers, artificial leathers, hygienic materials, filters, separators, etc., for electric cells by using the fiber. SOLUTION: Different polyolefin-based resins having plural components are melt-spun so that the resultant fiber has a structure in which a component containing (meth)acrylic acid metal salt (MA-containing component) 1 and a component not containing (meth)acrylic acid metal salt (component not containing MA) 2 are adjacent and mutually split and the resultant fiber is as necessary subjected to drawing, treatment with a fiber treating agent, crimping and cutting to provide the objective polyolefin-based splittable type conjugated fiber. The polyolefin-based splittable type conjugated fiber is split so as to form ultrafine fiber having <1 dtex fineness to provide the objective dense and homogeneous nonwoven fabric having original touch feeling of ultrafine fiber and few texture unevenness.
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