Daikin Industries, Ltd.

Hitoshi Imamura

Hideki Kono

Eri Mukai

Tatsuya Funaoka

Takahisa Aoyama

Masahiro Kondo

Yuuki Kuwajima

Manabu Fujisawa

Hiroyuki Hamada

Masamichi Sukegawa

Takeshi Shimono

Hirokazu Itou

Tetsuo Shimizu

Tadaharu Isaka

Hayato Tsuda

Yasuyuki Yamaguchi

Kyouhei Sawaki

Jihong Liu

Katsuhide Ohtani

Junya Iida

Takeshi Kozuki

Hiroaki Wada

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/cmor less.

Tube, method for producing tube, and method for storing tube

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.

Magnet wire and coil

The present disclosure provides a welded body having a connecting structure formed by welding a first molded body and a second molded body, wherein the first and second molded bodies contain at least one copolymer selected from the group consisting of a tetrafluoroethylene/fluoro (alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer, and wherein the connecting structure has a liquid contact surface to be in contact with a liquid having a solubility parameter of 14 to 35 (MPa), a welded part formed in the connecting structure is not exposed to the liquid contact surface, and the number of particles of 30 nm or larger to be eluted from the liquid contact surface in the connecting structure is 1,000 particles/ml or less.

Welded body

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

A method for producing a tube for a chemical solution pipe composed of a cleaned fluororesin molded article, the method including cleaning a tube-shaped fluororesin molded article with a chemical solution; and cleaning the tube-shaped fluororesin molded article with water. The cleaning with water is performed after the cleaning with a chemical solution, and the chemical solution is an alcohol or an aqueous alcohol solution.

Method and system for producing fluororesin molded article

A wafer cup including a copolymer containing a tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit. A water contact angle of at least a part of an inner surface of the wafer cup is 80 degrees or less.

Wafer cup

A molded article containing a copolymer including a tetrafluoroethylene unit and a perfluoro(alkyl vinyl ether) unit, wherein a surface roughness Ra of the molded article is 0.20 μm or less, and a water contact angle of the molded article is 80 degrees or less. Also disclosed is a method for producing the molded article.

Molded article and production method therefor

A molding material including a melt-fabricable fluororesin and having a metal content of 100 ng/1 g or less as measured by an ashing method. Also disclosed is a tube made of the molding material.

Molding material and tube

A fluororesin material including a melt-fabricable fluororesin, the fluororesin material having a dielectric constant of 2.1 or less and a dielectric loss tangent of 0.00030 or less at 12 GHz. Also disclosed is a fluororesin material for high-frequency transmission including the fluororesin material and a coated electric wire for high-frequency transmission including a solid insulating coating layer made of the fluororesin material.

Fluororesin material, fluororesin material for high frequency transmission, and covered electric wire for high-frequency transmission

The invention provides a molded article containing a specific fluororesin and having excellent hydrophilicity. The molded article containing the fluororesin has a melt flow rate of 1.00 g/10 min or lower and a water contact angle of 90&#xb0; or smaller. The fluororesin contains at least one copolymer selected from the group consisting of a copolymer containing a tetrafluoroethylene unit and a perfluoro(alkylvinylether) unit and a copolymer containing a tetrafluoroethylene unit and a hexafluoropropylene unit.

Molded article and manufacturing method for molded article

The invention provides a process for producing a modified molded article capable of providing a diaphragm that is less likely to generate particles. The process for producing a modified molded article includes: molding modified polytetrafluoroethylene containing a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with tetrafluoroethylene to provide a molded article; and irradiating the molded article with not lower than 30 kGy but lower than 70 kGy of radiation at 270&#xb0; C. to 310&#xb0; C. to provide a modified molded article.

Process for producing modified molded article, molded article, diaphragm, and diaphragm valve

The present invention aims to provide a method for producing a modified molded article that has favorable appearance, high breaking strength, and excellent abrasion resistance, as well as excellently low permeability to nitrogen gas and hydrochloric acid. The method for producing a modified molded article of the present invention includes molding a fluororesin to provide a molded article and irradiating the molded article with radiation at an irradiation dose of lower than 100 kGy at 50&#xb0; C. to 200&#xb0; C. to provide a modified molded article.

Method for producing modified molded article of fluororesin

The present invention aims to provide a modified fluorine-containing copolymer excellent in crack resistance, a fluororesin molded article, and a method of producing a fluororesin molded article. The present invention includes a modified fluorine-containing copolymer consisting only of tetrafluoroethylene units and perfluoro(alkyl vinyl ether) units. The copolymer is modified by irradiation with radiation at an irradiation temperature not higher than the melting point of the copolymer but not lower than 200&#xb0; C.

Modified fluorine-containing copolymer, fluorine resin molded article, and method for manufacturing fluorine resin molded article

A method for producing a modified molded article which includes molding a fluororesin to provide a molded article and irradiating the molded article with radiation at an irradiation dose of lower than 100 kGy at 50&#xb0; C. to 200&#xb0; C. to provide a modified molded article.

A modified fluorine-containing copolymer obtained by irradiating a copolymer with radiation at a temperature of not higher than the melting point of the copolymer. The copolymer includes at least one copolymer selected from a copolymer including a tetrafluoroethylene unit and a perfluoro(alkyl vinyl ether) unit and a copolymer including a tetrafluoroethylene unit and a hexafluoropropylene unit, and has 10 to 10000 functional groups in total per 10carbon atoms.

Growing community of inventors

Osaka, Japan

Hitoshi Imamura