Title:
METHOD FOR MANUFACTURING BICOMPONENT FIBER, AND BICOMPONENT SPINNERET
Document Type and Number:
WIPO Patent Application WO/2023/171363
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a bicomponent fiber wherein, in accordance with a desired shape, an another-component polymer is supplied and an appropriate amount of another sea-component polymer is supplied to the outer peripheral side of a bicomponent fiber to form a bicomponent polymer flow, thereby to form various fiber cross-sectional configurations with high accuracy and to provide a bicomponent fiber in which a high dimensional stability of the cross-sectional configurations can be maintained. In the method, a sea-component polymer and at least one kind of another-component polymer different from the sea-component polymer are distributed by means of a distribution plate (3), the sea-component polymer and the another-component polymer that have been distributed by means of the distribution plate (3) are respectively discharged from a sea-component discharge hole (2) and an another-component discharge hole (1) of a discharge plate (4) which is disposed downstream of the distribution plate (3) with respect to a polymer spinning path direction, to form at least one bicomponent polymer, and the bicomponent polymer is discharged from a discharge hole (16) of a spinneret discharge plate (5) which is disposed downstream of the discharge plate (4) with respect to the polymer spinning path direction. A discharge surface (23) of the discharge plate (4) has at least one hole group in which a plurality of the sea-component discharge holes (2) are disposed around one or a plurality of the another-component discharge holes (1) in correspondence to the one bicomponent polymer. In the one hole group, if a circle of a minimum diameter that includes all of the another-component discharge holes (1) on the inside thereof is a virtual circle (14), a total discharge amount Qout of the sea-component polymer that is discharged from all of the sea-component discharge holes (2) disposed in the region outside the virtual circle (14) and a total discharge amount Qin of the sea-component polymer that is discharged from all of the sea-component discharge holes (2) disposed in the region inside the virtual circle (14) satisfy Qout/Qin≥0.5.
Inventors:
KANEMORI YASUNORI (JP)
HIRAKAWA MOEKA (JP)
FUNAKOSHI JOJI (JP)
HIRAKAWA MOEKA (JP)
FUNAKOSHI JOJI (JP)
Application Number:
PCT/JP2023/006171
Publication Date:
September 14, 2023
Filing Date:
February 21, 2023
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D01D5/36; D01D4/06
Domestic Patent References:
| WO2012090538A1 | 2012-07-05 | |||
| WO2013133056A1 | 2013-09-12 |
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