PROBLEM TO BE SOLVED: To provide a new means for imparting heat resistance to a filament nonwoven fabric formed out of a polylactic acid-based polymer.;SOLUTION: The nonwoven fabric is obtained by using conjugate filaments comprising a polylactic acid polymer (A) having a melting point of 150°C or more and a polymer alloy as the components, as constituent filaments by a spunbond method. The polymer alloy forms at least a part of the fiber surface. The polymer alloy contains the polylactic acid-based polymer (A), a polyester copolymer (B) having a melting point of 160-230°C and a compatibilizer (C), and the conjugate filament exhibits a sea-island structure formed out of the polylactic acid-based polymer (A) forming the sea component, and the polyester copolymer (B) forming the island component. The domain size of the island component is 0.001-0.1 μm.;COPYRIGHT: (C)2009,JPO&INPIT
展开▼
