| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyamide multifilament excellent in water absorption, drying properties, and contact cooling feeling, and having soft feeling and bulky feeling. SOLUTION: The polyamide multifilament is constituted as follows. The shape of single fiber cross-section has two convex parts and one groove part sandwiched therebetween, and a nearly cardioid shape in non-rotational symmetry based on the center of the single fiber cross-section. The lower part of the cross-section constituted by the contact of the extended border lines on the non-groove part sides of both the two convex parts has a curved shape having a concave part. The border line on the groove side of the convex part and the border line on the non-groove part side are not parallel, and both thereof are not curved by mutually extending at an equal interval. The ratio (a/b) of the length (a) of a side A to the length b of a side B of the circumscribed right-angled quadrangle surrounding the single fiber cross-section is 0.3-3.0, and the ratio (d/b) of the length d of a vertical line D hung down from a straight line F binding contact points P1 and P2 of the single fiber cross-section contacting with the two sides B of the circumscribed right-angled quadrangle respectively to a lowest point Q of the lower part of the single fiber cross-section on the opposite side of the two convex parts, to the length b of the side B is 0.3-0.8. COPYRIGHT: (C)2011,JPO&INPIT |
