公开(公告)号：US20220203278A1

公开(公告)日：2022-06-30

申请号：US17696872

申请日：2022-03-17

Applicant: FUJIFILM Corporation

Inventor： Yosuke NAKAGAWA ,  Yasuhisa SHIMODA ,  Kazuhide KANEMURA

IPC: B01D39/18 ,  D04H1/425 ,  D04H1/728

Abstract: A nonwoven fabric is formed of fibers of 0.10 μm or more and 5.00 μm or less. The nonwoven fabric includes a coarse layer portion and a dense layer portion. In the coarse layer portion, a void volume Pc is at least 90% and an average pore diameter Dc is in a range of 0.5 μm or more and 50 μm or less. In the dense layer portion, a void volume Pd is at least 70% and a relative standard deviation of pore diameter distribution is 20% or less.

公开(公告)号：US20160354964A1

公开(公告)日：2016-12-08

申请号：US15231094

申请日：2016-08-08

Applicant: FUJIFILM Corporation

Inventor： Yukihiro KATAI ,  Shigehisa SUGIYAMA ,  Seiji KASAHARA ,  Yasuhisa SHIMODA ,  Masahiro ESAKI

IPC: B29C47/00 ,  B29B11/04

CPC classification number: B29C47/0021 ,  B29B11/04 ,  B29C47/0014 ,  B29K2001/12 ,  B29L2007/008 ,  D01D5/06 ,  D01F2/28 ,  D01F13/02 ,  D04H1/4258 ,  D04H1/72 ,  D04H1/736 ,  D21H13/02 ,  Y02P70/627

Abstract: A fiber manufacturing method includes the following steps of: dissolving a polymer in a solvent to obtain a polymer solution; spraying the polymer solution into a liquid heated to a boiling point of the solvent or higher, and evaporating the solvent to precipitate a fibrous polymer in a sealed precipitation tank, the liquid being immiscible with the polymer and the solvent; conveying the precipitated fibrous polymer in a liquid from the precipitation tank; water-rinsing the fibrous polymer conveyed in the liquid in the conveying step in a sealed water-rinsing tank; conveying the water-rinsed fibrous polymer in a liquid from the water-rinsing tank; and cooling and condensing solvent gas that is generated in the spraying step and the water-rinsing step.

Abstract translation: 纤维制造方法包括以下步骤：将聚合物溶解在溶剂中以获得聚合物溶液; 将聚合物溶液喷射到加热到溶剂沸点以上的液体中，蒸发溶剂使纤维聚合物沉淀在密封的沉淀槽中，该液体与聚合物和溶剂不混溶; 将沉淀的纤维聚合物从沉淀槽输送到液体中; 在输送步骤中在密封的水冲洗槽中水洗在液体中输送的纤维聚合物; 从水洗槽输送水冲洗的纤维聚合物液体; 以及在喷雾步骤和水漂洗步骤中产生的冷却和冷凝溶剂气体。