Patent ID: 6211101
Filing Date: 2001-04-03
Classification: D06M,Y10T

Abstract:
A durable hydrophilic fiber comprisinga fiber consisting of a thermoplastic resin to which 0.2-1.5% by weight of fiber-treating agent based on the fiber is appliedwherein the fiber-treating agent contains at least 40% by weight of a mixture comprising of 20-80% by weight of the following component (A) and 80-20% by weight of the following component (B);wherein component (A) is a betaine compound represented by formula (1)R.sup.1 R.sup.2 R.sup.3 --N.sup.+ --CH.sub.2 COO.sup.- (1)(R.sup.1 represents an alkyl group having 8-30 carbon atoms or such an alkyl group wherein its hydrogen atom is replaced by a hydroxyl- or a carboxyl-group; R.sup.2 and R.sup.3 each represents independently a hydrogen, an alkyl group having 1-5 carbon atoms or such an alkyl group wherein its hydrogen atom is replaced by a hydroxyl- or a carboxyl-group);and component (B) is an ester compound ofa dicarboxylic acid having 2-20 carbon atoms,and an ester of hydroxy-fatty acid having 5-30 carbon atoms which 10 to 100 mol % (on the basis of the number of hydroxyl groups existing in the molecule of said hydroxy-fatty acid ester) of oxyalkylene units are added to its hydroxyl group.