To provide a polyester fiber capable of efficiently forming fibrillar superfine fiber having a sufficient length and capable of providing polyester fabric having excellent hand and feel.
This polyester fiber is a modified multilobed polyester fiber mentioned below and comes into use after forming fibrillar superfine fiber by subjecting the fiber to alkaline weight-reducing treatment: (a) having at least one kind of aromatic dicarboxylic acid components or their ester-forming derivatives and at least one kind of diols components; (b) including ≥1 wt.% organic metal sulfonate of the formula: R-SO3M (wherein, R is a 3-30C alkyl, or a 7-40C aryl or alkylaryl; M is an alkali metal) and (c) having multilobed fiber cross section having 3-20 projection. Thus, the modified polyester fiber is adjusted so as to form fibrillar superfine fibers having 0.1-10 μm diameter and ≥10 μm length by being subjected to alkaline weight-reducing treatment.
| JP2000500537 | [Title of Invention] Abrasive |
AKITA TAKASHI
SAKAKURA HIDEO
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