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公开(公告)号：US11440289B2
公开(公告)日：2022-09-13
申请号：US16784537
申请日：2020-02-07
Applicant: KURARAY CO., LTD.
Inventor： Tetsuya Okamoto , Yasuhiro Shirotani
IPC: B32B5/26 , B32B5/02 , B32B37/04 , B32B37/26 , D01D5/08 , D01D5/092 , D01D13/00 , D04H3/011 , D04H3/16
Abstract: Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.
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公开(公告)号：US11642247B2
公开(公告)日：2023-05-09
申请号：US16342271
申请日：2017-11-01
Applicant: KURARAY CO., LTD.
Inventor： Yasuhiro Shirotani , Yohei Shimizu , Yasutomi Matsushima , Junichi Taniguchi
CPC classification number: A61F13/0246 , A61F13/0276 , B32B27/12 , C09J201/00 , D04H3/16 , B32B27/40
Abstract: A pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer is provided. The pressure-sensitive adhesive layer includes crater portions, each crater portion being concavely formed on an adhesive surface of the pressure-sensitive adhesive layer. A surface of the crater portion has a plurality of through holes.
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Patent Agency Ranking
公开(公告)号：US09963810B2
公开(公告)日：2018-05-08
申请号：US14899687
申请日：2014-06-26
Applicant: KURARAY CO., LTD.
Inventor： Masahiro Sasaki , Yasuhiro Shirotani
Abstract: With a nonwoven fabric made of fibers mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. from 100 to 3000 Pa·s and an average fiber diameter from 1 to 10 μm, a nonwoven fabric which is excellent in flame retardancy and can have a small thickness within a range from 5 to 900 μm with strength being maintained because of its denseness can be provided.
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公开(公告)号：US11864314B2
公开(公告)日：2024-01-02
申请号：US17417506
申请日：2019-12-18
Inventor： Kohei Hayashi , Soichi Obata , Yasuhiro Shirotani , Masashi Nitani , Mayumi Uno , Kazuki Maeda
CPC classification number: H05K1/038 , D06M10/001 , D06M23/16 , H05K3/28 , H05K3/4644 , H05K2201/0275
Abstract: The present invention relates to a patterned fiber substrate comprising: a fiber substrate; and a pattern consisting of a functional material and formed on the fiber substrate, wherein at least a part of the functional material that constitutes the pattern is present in inside of the fiber substrate, the fiber substrate has a contact angle of 100 to 170° with pure water on its surface, and the pattern has a narrowest line width of 1 to 3000 μm.
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公开(公告)号：US10829879B2
公开(公告)日：2020-11-10
申请号：US15505495
申请日：2014-08-22
Applicant: KURARAY CO., LTD.
Inventor： Yasuhiro Shirotani , Kimihiko Houhashi , Kazuo Ohira
Abstract: Provided is a conductive nonwoven fabric, including a meltblown nonwoven fabric made from a melt liquid-crystal-forming wholly aromatic polyester having a melt viscosity at 310° C. of less than or equal to 20 Pa·s and satisfying (A) an average fiber diameter from 0.1 μm to 5 μm, (B) two or less film-like objects existing per 1 mm2 of the nonwoven fabric, (C) a breaking length in a warp direction of greater than or equal to 10 km and a breaking length in a weft direction of greater than or equal to 6 km, (D) a basis weight from 1.0 g/m2 to 15 g/m2, (E) a thickness from 5 μm to 50 μm, and (F) an air permeability of less than or equal to 300 cc/cm2/second, and a metal coating film formed on the meltblown nonwoven fabric.
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公开(公告)号：US10526736B2
公开(公告)日：2020-01-07
申请号：US15129254
申请日：2015-03-24
Applicant: KURARAY CO., LTD.
Inventor： Yasuhiro Shirotani
Abstract: Provided are a nonwoven fabric mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. of 100 to 3000 Pa·s, and satisfying conditions of: 1) an average fiber diameter of 0.5 to 5 μm; 2) an air permeability of more than or equal to 20 seconds/100 mL; and 3) a withstand voltage of more than or equal to 15 kV/mm, an insulating material using the nonwoven fabric, and a method for manufacturing the nonwoven fabric including continuously treating fibers between a pair of rolls at a temperature of 150 to 300° C. and a linear pressure of 100 to 500 kg/cm.
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公开(公告)号：US10400372B2
公开(公告)日：2019-09-03
申请号：US15522506
申请日：2015-10-26
Applicant: KURARAY CO., LTD.
Inventor： Yasuhiro Shirotani , Ikuhisa Shiraishi
Abstract: Use of an electrically charged nonwoven fabric that is made of a fiber predominantly composed of an amorphous polymer provides a novel filtration material having improved performance compared to that of conventional filtration materials, and having excellent heat resistance and excellent flame retardancy as well as an electrically charged nonwoven fabric for use in the filtration material. It is preferable that the surface charge density is greater than or equal to 1×10−10 coulomb/cm2. It is preferable that the collection efficiency for collecting a dust particle with a particle diameter of 1 μm flowing at a fabric-passing velocity of 8.6 cm/second is greater than or equal to 40%, the QF value is greater than or equal to 0.05, and the decrement of the dust-particle collection efficiency after being allowed to leave at 100° C. for 24 hours is less than or equal to 10%.
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