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AssigneeUnitika Ltd.
InventorsKoichi Nagaoka, Shigetaka Nishimura, Fumio Matsuoka, Naoji Ichise, Yasuhiro Yonezawa, Keiko Sakota
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A biodegradable filament nonwoven fabric comprising a nonwoven web made up of filaments, each filament comprising a high melting point component composed of a first aliphatic polyester having biodegradability and a low melting point component composed of a second aliphatic polyester having biodegradability with a melting point lower than that of the high melting point component, the nonwoven web processed to a predetermined nonwoven fabric configuration. At least one of the high melting point component and the low melting point component is arranged in a plurality of divisions within the cross section of the filament. Both the high melting point component and the low melting point component extend continuously in the axial direction of the filament and are exposed on the surface of the filament. A method for manufacturing the biodegradable filament nonwoven fabric is also disclosed herein.
A biodegradable filament nonwoven fabric comprising a nonwoven web made up of filaments, each filament consisting of a high melting point component composed of a first biodegradable aliphatic polyester and a low melting point component composed of a second biodegradable aliphatic polyester with a melting point lower than that of the high melting point component, the nonwoven web processed to a predetermined nonwoven fabric configuration, at least one of the high melting point component and the low melting point component being arranged in a plurality of divisions in the cross section of the filament, both the high melting point component and the low melting point component extending continuously in the axial direction of the filament, the both components being exposed on the surface of the filament.
A method of manufacturing a biodegradable filament nonwoven fabric which comprises melt-spinning filaments, each filament being comprised of a high melting point component composed of a first aliphatic polyester having biodegradability and a low melting point component composed of a second aliphatic polyester having biodegradability and a melting point lower than that of the high melting point component, arranging the high melting point component and the low melting point component within a cross section of the filament in such a way that at least one of the two components is arranged in a plurality of divisions, while allowing both the high melting point component and the low melting point component to extend continuously in the axial direction of the filament and to be exposed on the surface of the filament, then drafting and attenuating the filaments, processing the filaments into a nonwoven web, and then processing the nonwoven web into a nonwoven fabric having a predetermined form.
Dependencies are inferred from the claim text.