| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hollow fiber including a non-water absorbing polymer, having a porous hollow part, and being excellent in light weight property, bulky feeling and soft feeling, a structure thereof, and a production method with which a hollow fiber structure can be produced from a composite fiber structure without causing a wastewater treatment problem and an environmental problem. <P>SOLUTION: There is provided a composite fiber in which a polyester-based thermoplastic polymer is a sea component 1; the polyester-based polymer is a copolymerized polyester including a dicarboxylic acid component and a glycol component; 80 mol% or more of the dicarboxylic acid component is a terephthalic acid component, 4.0-12.0 mol% is a cyclohexane dicarboxylic acid component, and 2.0-8.0 mol% is an aliphatic carboxylic acid component; and the glycol component includes a polyester polymer comprising an ethylene glycol component as a main component; and a thermoplastic polyvinyl alcohol-based polymer containing a plasticizer and having an apparent melt viscosity of 40-400 Pa s at 240°C and a shear rate of 1000 sec<SP POS="POST">-1</SP>is an island component; and an island component 2 is water soluble. <P>COPYRIGHT: (C)2013,JPO&INPIT |
