Title:
NONWOVEN PRODUCTION DEVICE AND PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/008052
Kind Code:
A1
Abstract:
The problem addressed by the invention is that of providing a nonwoven production device and production method with which it is possible to efficiently obtain a microfibre nonwoven having an extremely small fibre diameter. The nonwoven production device according to the present invention has a slot-shaped gap (4) between a nozzle (1), which has a group of discharge holes in which discharge holes (2) for discharging a molten polymer are arranged in one row, and a pair of lips (3), which are arranged opposite one another with the group of discharge holes of the nozzle (1) in between. Said nonwoven production device sprays gas from the gap (4) onto the polymer discharged from the discharge holes (2) to produce a nonwoven and is characterised in that: a pair of widening wall surfaces (6) that extend in the polymer discharge direction with bottom surfaces of the lips (3) as the starting point thereof are arranged so as to be opposite one another with the polymer discharged from the discharge holes (2) in between; the angle α formed by the pair of widening wall surfaces (6) is in the range of 60°≤α≤120°; and, where (X) are points of intersection between the bottom surfaces of the lips (3) and wall surfaces forming the gap (4), and (Y) are points of intersection between the bottom surfaces of the lips (3) and the widening wall surfaces (6), the distance P between opposite points of intersection (X) and the distance H between opposite points of intersection (Y) are in the range of 2≤H/P≤15.
Inventors:
TERAMOTO YU (JP)
FUNAKOSHI JOJI (JP)
TAMURA TOMOKI (JP)
FUNAKOSHI JOJI (JP)
TAMURA TOMOKI (JP)
Application Number:
PCT/JP2022/025714
Publication Date:
February 02, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D01D5/08; D01D4/02
Foreign References:
| US6247911B1 | 2001-06-19 | |||
| JP2003502524A | 2003-01-21 | |||
| US20080122143A1 | 2008-05-29 | |||
| JPS5167411A | 1976-06-11 |
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