Title:
ELECTRET MELT-BLOWN NONWOVEN FABRIC PRODUCING METHOD AND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/167057
Kind Code:
A1
Abstract:
In order to carry out more homogenous electret processing, while reducing drying load and even for a wide area, through high-precision spraying of a small quantity of water over the width direction, provided is a method of producing an electret melt-blown nonwoven fabric configured so that, when melt spinning of a non-electroconductive polymer from a mouthpiece provided with a plurality of spinning holes in the width direction to collect the resulting spun yarn at a lower collection device to make same into a melt-blown nonwoven fabric, water is sprayed from a spray nozzle onto the spun yarn from the mouthpiece up until the collection device and the melt-blown nonwoven fabric is electretized, wherein: the spray nozzle is provided with a plurality of water outlets arrayed in the width direction, and a pair of air outlets that open up either continuously or intermittently along the width direction and that are arrayed facing opposite so as to have the plurality of water outlets interposed therebetween; and the water is sprayed onto the spun yarn by making the air discharged from the air outlets collide with the water discharged from the plurality of water outlets.
Inventors:
TANAKA YOSHIKI (JP)
HAYASHI SHINGO (JP)
YOSHITOMI TOMOHIRO (JP)
SAKASHITA RYUTA (JP)
MINOURA KIYOSHI (JP)
UEDA KOHEI (JP)
HAYASHI SHINGO (JP)
YOSHITOMI TOMOHIRO (JP)
SAKASHITA RYUTA (JP)
MINOURA KIYOSHI (JP)
UEDA KOHEI (JP)
Application Number:
PCT/JP2023/006205
Publication Date:
September 07, 2023
Filing Date:
February 21, 2023
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D04H3/16; B01D39/14; B01D39/16; B03C3/28; D04H3/007
Domestic Patent References:
| WO2003060216A1 | 2003-07-24 |
Foreign References:
| JP2002161467A | 2002-06-04 | |||
| US20110168024A1 | 2011-07-14 | |||
| JP2022149681A | 2022-10-07 |
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