| 摘要 |
Polyester-based heat-bonding conjugate staple fibers capable of giving a high grade fiber structure which has good dimensional stability and is hardly deformed, even when used under a high temperature atmosphere, comprises an amorphous polyester having a glass transition point of 50 to 100° C. and not having a crystal-melting point as a heat-bonding component and a polyalkylene terephthalate having a melting point of not less than 220° C. as a fiber-forming component, have characteristics comprising the number of crimps of 3 to 40 crimps/25 mm, a crimp percent of 3 to 40% and a web area shrinkage percent of not more than 20%. Herein, the web area shrinkage percent (%) is represented by the expression: (A0-A1)/A0x100, wherein a card web nonwoven fabric comprising 100% of the heat-bonding conjugate staple fibers and having an area of A0 and a basis weight of 30 g/m2 is left in a hot air dryer maintained at 150° C. for two minutes, and the area of the left nonwoven fabric is A1.
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