To obtain a biodegradable nonwoven fabric controllable in biodegradability, excellent in formation, mechanical properties, and both the cooling effect and spinnability of the delivered filament yarns comprising the nonwoven fabric, also having thermoadhesive function, and, according to need, capable of presenting water absorbing ability.
This nonwoven fabric comprises filament yarns each of which is made up of high-melting component 1 and low-melting component 2 each made from a biodegradable aliphatic polyester and so designed that, in the cross section, the high- melting component 1 and the low-melting component 2 alternately occupy each specified range circumferentially around the center, and both the components are respectively divided into segments with equal area. This biodegradable nonwoven fabric is obtained by melt spinning into alternately arranged type conjugated continuous fibers 3 where both the high-melting and low-melting components 1, 2 lie continuous in the fiber axial direction and exposed on the fiber surface followed by drafting and thinning the fibers into a continuous fiber nonwoven web which is then either partially thermofused into a unit, or, laminated with a natural fiber nonwoven web followed by conducting an ultrasonic fusing treatment to partially thermofuse both the nonwoven webs into a unit.
NISHIMURA SHIGETAKA
MATSUOKA FUMIO
ICHINOSE NAOJI
SAKOTA KEIKO
