Core-sheath composite fiber and method for producing same
AssigneeToray Industries, Inc.
InventorsJunichi Mizota, Takashi Ida, Hidetoshi Takanaga
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Abstract
A core-sheath composite fiber includes a core component including an easily alkaline elutable polyester with a main repeating unit constructed of ethylene terephthalate containing 2.0 to 5.5 mol % of an isophthalic acid component containing a metal sulfonate group relative to a total acid component and 3.0 to 6.0 mol % of an adipic acid component relative to the total acid component, and a sheath component including a polyamide.
Claims20
A core-sheath composite fiber comprising a core component comprising an easily alkaline elutable polyester with a main repeating unit constructed of ethylene terephthalate containing 2.0 to 5.5 mol % of an isophthalic acid component containing a metal sulfonate group relative to a total acid component and 3.0 to 6.0 mol % of an adipic acid component relative to the total acid component, and a sheath component comprising a polyamide.
A method of producing a core-sheath composite fiber comprising performing melt spinning, with a core component being an easily alkaline elutable polyester having a main repeating unit constructed of ethylene terephthalate and containing 2.0 to 5.5 mol % of an isophthalic acid component containing a metal sulfonate group relative to a total acid component and 3.0 to 6.0 mol % of an adipic acid component relative to the total acid component, and with a sheath component comprising a polyamide.
Dependencies are inferred from the claim text.