Patent ID: 7829487
Filing Date: 2010-11-09
Classification: D04H,Y10T

Abstract:
1. An extensible nonwoven fabric which is a spunbonded nonwoven fabric that comprises a fiber having substantially no crimps and comprising at least two olefin-based polymers, said at least two olefin-based polymers being of the same kind and having a difference between induction periods of strain-induced crystallization, as measured at the same temperature and the same shear strain rate, of 100 seconds or longer, wherein among the at least two olefin polymers constituting the fiber, the olefin-based polymer having the earliest induction period of strain-induced crystallization is contained in an amount of 1 to 20 wt % of the fiber, and wherein the fiber is a conjugate fiber having a concentric sheath-core configuration, in which the core resin has the earliest induction period of strain-induced crystallization.