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Title:
LAMINATED NONWOVEN FABRIC AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH09279452
Kind Code:
A
Abstract:

To obtain a laminated nonwoven fabric comprising short fibers made of conjugate filament yarns of excellent cooling disposition, spinnability and drawability following their delivery from a spinneret, good in biodegradability which is controllable, rich in both moisture and water absorbability, and having enough mechanical strength to stand its practical use.

The single fiber as constituent fiber of this nonwoven fabric has the following characteristics: made up of high-melting component 1 and low-melting component 2 each consisting of biodegradable aliphatic polyester; in the fiber cross-section, the low-melting component 2 represents core, while the high-melting component 1 plural projections independent of one another arranged circumferentially around the low-melting component 2; and the low-melting component 2 is continuous without being segmented by the high-melting component 1. To obtain the above constituent fiber, a melt conjugate spinning followed by drawing is conducted to produce multifoliate-type conjugate filament yarns in such a way that both the high-melting and low-melting components 1, 2 are continuous in the direction of fiber axis and exposed onto the fiber surface alternately, and the resultant drawn filament yarns are mechanically crimped and cut to a specified length, then carded into a short fiber web, which is, in turn, laminated with a natural fiber web followed by subjecting both the webs to fluid jet treatment into integration through three-dimensional interlacing of the constituent fibers of both the webs, thus affording the objective laminated nonwoven fabric.


Inventors:
MATSUNAGA MAMIKO
NAGAOKA KOICHI
Application Number:
JP9211796A
Publication Date:
October 28, 1997
Filing Date:
April 15, 1996
Export Citation:
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Assignee:
UNITIKA LTD
International Classes:
D01F8/14; C08L101/16; D04H1/541; D04H5/06; (IPC1-7): D04H1/54; D01F8/14; D04H5/06
Attorney, Agent or Firm:
森本 義弘