公开(公告)号：US20170327983A1

公开(公告)日：2017-11-16

申请号：US15486385

申请日：2017-04-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KOTA NAKAHIRA ,  TOSHIFUMI NAGINO ,  KAZUFUMI MIYATAKE ,  MOTOI HATANAKA

IPC: D04H1/56 ,  D04H1/4291 ,  D01D5/098 ,  D01F6/06 ,  D04H3/16 ,  D04H3/007

CPC classification number: D04H1/56 ,  D01D5/0985 ,  D01F6/06 ,  D04H1/4291 ,  D04H1/4382 ,  D04H3/007 ,  D04H3/016 ,  D04H3/16

Abstract: A non-woven fabric, non-woven fabric producing method and an acoustic absorbent of desirable properties are provided. The non-woven fabric is a non-woven fabric including a plurality of ultrafine fibers configured from a thermoplastic resin, and comprises: a base portion configured by entangling of some of the plurality of ultrafine fibers; and a fiber bundle configured by entangling and bundling of other ultrafine fibers in the plurality of ultrafine fibers, and that is entangled with the base portion. The fiber bundle has a lower void fraction than a void fraction of the base portion.

公开(公告)号：US20180105955A1

公开(公告)日：2018-04-19

申请号：US15564756

申请日：2016-12-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MOTOI HATANAKA ,  TOSHIFUMI NAGINO ,  KAZUFUMI MIYATAKE ,  KOTA NAKAHIRA ,  NOBORU MASUDA

IPC: D01D5/08 ,  D01F6/06 ,  D04H5/06

CPC classification number: D01D5/08 ,  D01D5/0985 ,  D01F6/04 ,  D01F6/06 ,  D04H1/4282 ,  D04H1/4291 ,  D04H1/56 ,  D04H3/007 ,  D04H3/016 ,  D04H3/14 ,  D04H3/16 ,  D04H5/06 ,  D10B2321/022 ,  D10B2401/00 ,  G10K11/16 ,  G10K11/162

Abstract: A fiber assembly that is obtained by melt-spinning a thermoplastic resin, in which a fiber diameter of the fiber assembly has a median diameter of 1 μm or less, and a melt viscosity of the fiber assembly is 100 mPa·s or more and 1000 mPa·s or less.