| abstract |
(57) [Summary] [Structure] (A) (a) an aromatic dicarboxylic acid unit having an aromatic nucleus substituted with a metal sulfonate, (b) a polyoxyalkylene unit, and (c) a side chain type polyoxyalkylene group. At least a part of the above-mentioned copolymerized polyester is treated with an alkali by treating a composite fiber comprising a copolymerized polyester having a specific ratio of (B) and at least one kind of other fiber-forming polymer and a cloth of the composite fiber. A method for producing a fabric or the like having a good texture by dissolving and removing. [Effects] According to the method of the present invention, the above-mentioned other fiber-forming polymers can be obtained even under mild alkaline treatment conditions. Copolymerized polyester without causing erosion or damage of (B) At least a part of (A) is rapidly dissolved and removed in an extremely short time, and a reduced amount of cloth, fibers, threads, etc. having a soft and excellent feeling, surface condition and appearance similar to natural fiber are obtained in a short time. Can be efficiently manufactured. |