Daikin Industries, Ltd.

Asahi Kasei E-Materials Corporation

Daikin America, Inc.

Daikan Industries, Ltd.

Asahi Kasei Kabushiki Kaisha

Tadaharu Isaka

Yumi Zenke

Hayato Tsuda

Yukari Yamamoto

Hiroyuki Hamada

Ryouichi Fukagawa

Masahiro Kondo

Takeshi Shimono

Tadashi Ino

Yasuyuki Yamaguchi

Takahisa Aoyama

Kenji Ishii

Masanori Ikeda

Tadahiro Yabu

Nobuyuki Uematsu

Takehiro Koga

Keizou Shiotsuki

Takahiro Kitahara

Takuya Arase

Hitoshi Imamura

Masahiro Kondou

Hiroyuki Sendan

Masaharu Nakazawa

Eiji Honda

Keiko Yamazaki

Yasuhiro Hashimoto

Hideki Iijima

Provided is a pipe joint including a cylindrical hollow, wherein the wall thickness of a part having the largest wall thickness of the pipe joint is 2 to 7 mm, the ratio of the length of the hollow in the axial direction (L) to the diameter of the hollow (D), (L/D), is 5 or less, the pipe joint contains a copolymer containing tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 2.8 to 6.0% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 4.0 g/10 min or higher and lower than 11.0 g/10 min, and the number of functional groups of the copolymer is 50 or less.

Pipe joint and manufacturing method of pipe joint

There is provided an injection molded article obtained by injection molding a copolymer using a mold provided with a gate, wherein the copolymer contains tetrafluoroethylene (TFE) unit and a fluoro(alkyl vinyl ether) (FAVE) unit, the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 5.2 to 6.3% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 19.0 to 35.0 g/10 min, the number of functional groups of the copolymer is 50 or less per 10main-chain carbon atoms, and the injection molded article has a gate section corresponding to the gate of the mold, and the ratio of the maximum flow length (a) from the gate section of the injection molded article to the average value (b) of the product thickness on the maximum flow length, ((a)/(b)), is 80 to 200.

Injection-molded body and production method therefor

Provided an injection molded article obtained by injection molding a copolymer using a mold provided with a gate, wherein the copolymer contains tetrafluoroethylene (TFE) unit and a fluoro(alkyl vinyl ether) (PAVE) unit, the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 3.5 to 4.7% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 22.0 to 35.0 g/10 min, the number of functional groups of the copolymer is 20 or less per 10main-chain carbon atoms, and the injection molded article has a gate section corresponding to the gate of the mold, and the ratio of the maximum flow length from the gate section of the injection molded article (a) to the average value of the product thickness on the maximum flow length (b), ((a)/(b)), is 80 to 200.

Provided is an injection molded article containing a copolymer containing tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, wherein the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 3.9 to 4.8% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 11.0 to 19.0 g/10 min, the melting point of the copolymer is 296 to 305° C., and the amount of fluorine ions dissolving out from the injection molded article into water is 7,500 μg/mor lower.

Provided is an injection molded article containing a copolymer containing tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, wherein the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 4.7 to 7.0% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 11.0 to 22.0 g/10 min, the melting point of the copolymer is 296 to 305° C., and the amount of fluorine ions dissolving out from the injection molded article into water is 7,500 μg/mor lower.

A member for a non-aqueous electrolyte battery containing a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, in which the number of functional groups per 10carbon atoms of a main chain of the copolymer is 100 or less, and a melt flow rate of the copolymer is less than 20 g/10 minutes.

Member for nonaqueous electrolyte batteries

Provided is an injection molding method for obtaining an injection molded article using an injection molding machine by means of filling a mold cavity of a mold with a molten copolymer from a nozzle of the injection molding machine, wherein the minimum thickness of the mold cavity is 0.8 mm or less, the total projected area of the mold is 1 cmor more, and the copolymer is a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, wherein the number of functional groups is 100 or less per 10main-chain carbon atoms of the copolymer.

Injection molding method

A member to be compressed for an electrochemical device, including a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, the copolymer having a content of the fluoroalkyl vinyl ether unit based on all the monomer units of the copolymer of 4.3% by mass or more and less than 5.5% by mass, and having a melt flow rate of 10 to 23 g/10 min.

Member to be compressed for electrochemical devices

Provided is a method for producing a resin molded article, capable of reducing deterioration of resin during melt extrusion. The method includes passing a resin fed from a hopper for resin through a molding machine provided with the hopper, an extruder, and a pressure control device in this order, to produce a resin molded article, the resin pressure between a tip of the extruder and an inlet port for resin of the pressure control device being 15.0 MPa or lower.

Molded resin body production method

A perfluorodiacyl peroxide represented by the following formula (1):(CFCOO)&#x2003;&#x2003;(1).Also disclosed is a solution containing the perfluorodiacyl peroxide, a polymerization initiator containing the perfluorodiacyl peroxide, a method for producing a polymer which includes polymerizing a radically polymerizable monomer with the perfluorodiacyl peroxide, and a perfluoroacyl chloride represent by the following formula (2):CFCOCl (2).

Perfluoro diacyl peroxide as polymerization initiator and polymer preparation method

Provided is a method for producing a purified fluoropolymer containing less fluoridable end groups. The production method includes: (a) melting a fluoropolymer to give a molten fluoropolymer; (b) reducing a reaction inhibitor in the molten fluoropolymer; (c) bringing the molten fluoropolymer into contact with an active substance after the step (b); and (d) removing a volatile matter from the molten fluoropolymer after the step (c).

Method for producing purified fluoropolymer

Provided is a tetrafluoroethylene/hexafluoropropylene copolymer which is less likely to form a lump, or is less likely to form a large lump even if a lump is formed, during the formation of an electric wire. The tetrafluoroethylene/hexafluoropropylene copolymer has a melt flow rate measured at 372&#xb0; C. of 35.0 to 45.0 g/10 minutes and a swell of &#x2212;8.0% to 5.0%, the sum of the numbers of &#x2014;CFH groups and unstable end groups being 120 or less per 1&#xd7;10carbon atoms.

Tetrafluoroethylene/hexafluoropropylene copolymer, and electric wire

Provided is a twisted wire including a plurality of covered wires twisted together, each covered wire including a conductor and an insulator covering the periphery of the conductor, wherein the twisted wire satisfies Inequality (1): y&#x3c;A&#xd7;x/(z/500)+B (wherein x: a pitch length (mm) of the twisted wire, y: a collapsing rate (%) of the insulator, z: an elastic modulus (MPa) of the insulator, A: Constant A=&#x2212;1, and B: Constant B=11.5).

Twisted wire and manufacturing method thereof

A composition which can provide foamed moldings and foamed electric wires having a small average cell size and a high foam content and causing fewer sparks. The composition includes a fluororesin (A) and a compound (B) which is a sulfonic acid or a salt thereof. The sulfonic acid is represented by the following formula (1): F(CF)SOH (1) wherein n is 4 or 5, or the following formula (2): F(CF)CHCHSOH (2) wherein n is 4 or 5. Also disclosed is a foamed molding formed from the composition and a method for producing a foamed molding.

Composition, and method for producing foam molded material and electric wire

The present invention aims to provide a composition which can provide molded foams and foamed electric wires having a small average cell size and a high expansion ratio. The composition of the present invention includes a fluororesin; and boron nitride having an average particle size of 10.5 &#x3bc;m or greater, or boron nitride having a particle size distribution represented by (D84&#x2212;D16)/D50 of 1.2 or lower.

Growing community of inventors

Settsu, Japan

Tadaharu Isaka