Patent ID: 7371701
Filing Date: 2008-05-13
Classification: C08G,D01F,D04H,D21H,Y10T

Abstract:
1. A nonwoven fabric comprising heat-adhesive composite staple fibers comprising a hot melt-adhesive polymer and a fiber-forming thermoplastic polymer, wherein: the hot melt-adhesive polymer forms a portion of the periphery of each composite staple fiber extending along the longitudinal direction of the composite staple fiber, and the fiber-forming thermoplastic polymer forms the remaining portion of each composite staple fiber; the fiber-forming thermoplastic polymer is a polyethylene terephthalate polymer produced by using a polycondensing catalyst; the catalyst comprises at least one member selected from mixtures (1) and reaction products (2) as specified below; the mixture (1) for the catalyst comprises: (A) titanium compound component comprising at least one member selected from the group consisting of: (B) phosphorus compound component comprising at least one phosphorus compound represented by the general formula (III):  in which formula (III), R the mixture (1) for the catalyst for the polycondensation being employed in an amount satisfying the requirements represented by the following expressions of relation (i) and (ii):  wherein M the reaction products (2) for the catalyst comprise: a component (C) reacted with a component (D), in which reaction products (2), the component (C) comprises at least one member selected from the group consisting of (c) titanium alkoxides represented by the general formula (IV):  in which formula (IV), R  in which formula (V), R