Hollow shrinkable fiber for pile and manufacturing method thereof, and pile product
AssigneeKaneka Corporation
InventorsShin Sudo, Satoru Harada
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Abstract
A hollow shrinkable fiber is manufactured by wet spinning a copolymer of acrylonitrile and a halogen-containing vinyl monomer, and then carrying out steam treatment, followed by drying treatment, and then heat treatment, thus forming a marrow-like or network-like hollow portion comprising a large number of voids in a core part of the fiber cross section. The void ratio of the fiber cross section is 10 to 50%, and the dry heat shrinkage percentage of the fiber is at least 15%. The fiber has a hollow form similar to that of natural fur, is excellent in terms of bulkiness, a lightweight feeling and warmth retention, and can be used as down hairs in pile products.
Claims6
A shrinkable fiber for pile, comprising a synthetic fiber having a marrow-like or network-like hollow core portion in the center of a cross section of the portion having a multiplicity of voids of different shape and formed irregularly and said skin portion having substantially few voids, whereby said fiber has cross section with a void ratio 10 to 50%, and said fiber being formed so as to be shrinkable with dry heat and have a dry heat shrinkage percentage of at least 15%.
Dependencies are inferred from the claim text.