公开(公告)号：US20220161527A1

公开(公告)日：2022-05-26

申请号：US17431015

申请日：2019-12-13

Applicant: DAIKIN INDUSTRIES, LTD. ,  DAIKIN AMERICA, INC.

Inventor： Kozue KOMAZAWA ,  Kyle BRUNDIN ,  Yuuki KUWAJIMA ,  Yosuke NISHIMURA ,  Steve MARICONTI ,  Takeshi INABA

IPC: B32B25/08 ,  B32B25/18 ,  B32B27/32 ,  B32B25/02 ,  B32B1/08 ,  B32B27/26 ,  B32B27/30

Abstract: Adding silica particles having specified collective characteristics to a fluororubber formulation enhances direct adhesion between the fluororubber formulation and a copolymer upon curing. Specifically, as measured before being mixed into the fluororubber formulation, the silica particles have an average value of the product “(particle size)×(circularity)” that is 17.5 nm or higher and 500 μm or lower. The silica particles may also have an average particle size of between 25.0 nm inclusive and 500 μm inclusive, and an average circularity of 0.80 or higher. Alternatively, as measured after being incorporated into the fluororubber formulation and then cured, the silica particles have an apparent average value of the product “(particle size)×(circularity)” that is 32.0 nm or higher and 500 μm or lower. The silica particles may also have an apparent average particle size of between 40.0 nm inclusive and 500 μm inclusive as measured after being incorporated into the fluororubber formulation and then cured.

公开(公告)号：US20220018763A1

公开(公告)日：2022-01-20

申请号：US17487453

申请日：2021-09-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahisa AOYAMA ,  Hayato TSUDA ,  Yuuki KUWAJIMA

IPC: G01N21/45 ,  G01N21/95 ,  B29C45/00 ,  B29C45/76

Abstract: A method for inspecting a molded article, the method enabling non-destructive inspection of an internal condition of a molded article containing fluorine, and a method for producing a molded article including the inspection method. The method for inspecting a molded article includes a step (A1) of inspecting an internal condition of a molded article having a fluorine content of 30% by mass or more based on image data obtained by imaging the molded article by optical coherence tomography.

公开(公告)号：US20210213712A1

公开(公告)日：2021-07-15

申请号：US17054858

申请日：2019-04-17

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yuuki KUWAJIMA ,  Yukinori KAMIYA

IPC: B32B27/08 ,  B32B1/08 ,  B32B27/30 ,  B32B27/34 ,  F16L9/12

Abstract: A laminate including: (A) a layer containing a perfluororesin, (B) a layer containing a polymer having a chlorotrifluoroethylene unit, and (C) a layer containing a non-fluorinated polymer. Also disclosed is a tube including the laminate.

公开(公告)号：US20190338114A1

公开(公告)日：2019-11-07

申请号：US16477401

申请日：2017-12-04

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yuuki KUWAJIMA ,  Hayato TSUDA ,  Kazuki HOSODA

IPC: C08L27/18 ,  C08L27/16 ,  C08F214/22 ,  C08F214/26 ,  C08F214/18

Abstract: A fluororesin including a vinylidene fluoride unit and a tetrafluoroethylene unit. The fluororesin has a gas chromatography-mass spectrometry total ion chromatogram including a peak which is assigned to a component having a molecular weight of 202 to 903 and which has a peak intensity of 1000 or lower. Also disclosed is a molded article formed from the fluororesin.

公开(公告)号：US20220223316A1

公开(公告)日：2022-07-14

申请号：US17605635

申请日：2020-04-17

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hitoshi IMAMURA ,  Hiroaki WADA ,  Yasuyuki YAMAGUCHI ,  Takeshi KOZUKI ,  Yuuki KUWAJIMA ,  Manabu FUJISAWA ,  Masamichi SUKEGAWA

IPC: H01B3/44 ,  H01B1/02 ,  H01F1/14

Abstract: A magnet wire including a conductor and an insulating coating formed on an outer periphery of the conductor. The insulating coating contains a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit. The copolymer has a melt flow rate of 10 to 60 g/10 min, and the copolymer has a fluoroalkyl vinyl ether unit content of 6.2 to 8.0% by mass based on a total content of monomer units.

公开(公告)号：US20220170573A1

公开(公告)日：2022-06-02

申请号：US17673374

申请日：2022-02-16

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hitoshi IMAMURA ,  Hiroyuki HAMADA ,  Eri MUKAI ,  Yuuki KUWAJIMA ,  Manabu FUJISAWA

IPC: F16L11/06 ,  B29C48/32 ,  B29C48/09 ,  B29C48/27

Abstract: Provided is a tube comprising a tetrafluoroethylene/fluoroalkyl vinyl ether copolymer, wherein the tube inner surface has a surface roughness Ra of 5 nm or less measured by atomic force microscopy (AFM) with an evaluation length set to 3 μm, and the tube has an amount of metals eluted from the tube inner surface of 0.30 ng/cm2 or less.

公开(公告)号：US20190137012A1

公开(公告)日：2019-05-09

申请号：US16097855

申请日：2017-04-11

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yuuki KUWAJIMA ,  Hayato TSUDA ,  Takeshi INABA

IPC: F16L11/10 ,  B32B1/08 ,  B32B27/30 ,  B32B27/32 ,  C08J5/24 ,  C08J5/04 ,  C08K3/04 ,  C08K7/06

Abstract: Provided is a fiber-reinforced composite material having a greater maximum stress, maximum elongation, and tensile modulus, which are determined by a tensile test, than conventional fiber-reinforced composite materials containing a fluororesin as a matrix. The invention relates to a fiber-reinforced composite material including a fluororesin and a reinforcing fiber, the fluororesin containing a tetrafluoroethylene unit and a vinylidene fluoride unit, the tetrafluoroethylene unit representing 55 to 95 mol % of all the monomer units constituting the fluororesin, the vinylidene fluoride unit representing 45 to 5 mol % of all the monomer units constituting the fluororesin.

公开(公告)号：US20230347634A1

公开(公告)日：2023-11-02

申请号：US18338777

申请日：2023-06-21

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yuuki KUWAJIMA ,  Hayato Tsuda

IPC: B32B27/12 ,  B32B27/30 ,  B32B5/02

CPC classification number: B32B27/12 ,  B32B27/304 ,  B32B5/02 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2307/54 ,  B32B2597/00

Abstract: A fiber-reinforced composite material containing a carbon fiber and a fluororesin, and having a tensile elasticity measured under specific conditions of 40 GPa or more.

公开(公告)号：US20230203296A1

公开(公告)日：2023-06-29

申请号：US18167469

申请日：2023-02-10

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yuuki KUWAJIMA ,  Yukinori Kamiya

IPC: C08L27/18 ,  C08F214/26 ,  B32B27/32 ,  B32B1/08 ,  B32B27/34 ,  B32B27/30

CPC classification number: C08L27/18 ,  C08F214/265 ,  C08F214/262 ,  B32B27/322 ,  B32B1/08 ,  B32B27/34 ,  B32B27/306 ,  C08F2800/10 ,  F16L11/04

Abstract: A fluororesin having a tensile strength retention ratio of 50% or more, the tensile strength retention ratio being calculated by the following formula from the tensile strength of the fluororesin after a heat treatment obtained by conducting a heat treatment at 130° C. for 40,000 hours, and the tensile strength of the fluororesin before the heat treatment. Tensile strength retention ratio (%)=(tensile strength of fluororesin after heat treatment (MPa))/(tensile strength of fluororesin before heat treatment (MPa))×100.

公开(公告)号：US20230066133A1

公开(公告)日：2023-03-02

申请号：US17259840

申请日：2019-06-17

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahisa AOYAMA ,  Hayato TSUDA ,  Yuuki KUWAJIMA

IPC: B29C45/76 ,  G01N3/08 ,  G01N33/44

Abstract: Provided is a method for testing a melt-fabricable fluororesin injection-molded article which enables easy determination of whether or not a tested article is a defective article due to a crack or delamination. The method for testing a melt-fabricable fluororesin injection-molded article includes determining whether or not a melt-fabricable fluororesin injection-molded article is defective due to a crack or delamination based on a stress-strain curve or tensile strength-strain curve obtained by a tensile test performed on the injection-molded article.