| 摘要 |
A machine crimped synthetic fiber having a fineness of 0.5 to 200 dtex,a fiber length of 3 to 20 mm,a number of crimp of 1 to 13/25 mm,and a percentage crimp of 2 to 20 %,which further has such a latent three−dimensional crimpability that two parts having different thermal shrinkabilities are formed in both sides of a virtual face dividing the fiber into two pieces along the longitudinal axis,and when the fiber is subjected to a heat treatment at 60 to 200˚C,it shrinks disproportionally to exhibit a three−dimensional crimping having a number of crimp of 15 to 80/25 mm and a percentage crimp of 25 to 90 %;a method for producing the machine crimped synthetic fiber,which comprises cooling to a solid ununiformly in the process of forming the fiber,or comprises forming an eccentric core−shell type or side−by−side type composite fiber from two types of thermally shrinkable synthetic resins. |
