| abstract |
(57) [Summary] (Modified) [Structure] Consists of a fiber-forming polymer B, which is a poorly soluble component in an alkaline aqueous solution, and a polyester A, which is an easily soluble component having an ethylene terephthalate unit of 80 mol% or more. In the extraction type composite fiber, the easily soluble polyester component is copolymerized with 5-sodium sulfoisophthalic acid, and the polyethylene glycol and the general formula (I) are used. The sulfonate compound of 1) is mixed. [Effect] By mixing high molecular weight non-reactive polyethylene glycol, spinnability, extraction speed, composite yarn strength, etc. can be increased, and the non-reactive sulfonate group has excellent antistatic ability. The characteristics of can be improved. |