Abstract: Provided is a molded body with a hollow portion comprising tetrafluoroethylene and perfluoro(alkyl vinyl ether) copolymer, which is obtained by heat treating a molded body with a hollow portion obtained by melt molding tetrafluoroethylene and perfluoro(alkyl vinyl ether) copolymer having a melt flow rate of 0.1 to 100 g/10 min when measured with a load of 5 kg and a measurement temperature of 372±0.1° C. in accordance with ASTM D1238. The heat treatment is carried out at a temperature from 130° C. below the melting point of the copolymer to the melting point of the copolymer. The molded body exhibits excellent blister resistance when utilized in contact with harsh chemicals and under harsh operating conditions.

Abstract: The present invention relates to a heat-meltable fluoropolymer composite composition having excellent thermal conductivity, gas and chemical liquid barrier properties and dynamic properties such as storage modulus which comprises a heat-meltable fluoropolymer fine powder and a layered-compound organized by treatment with tetraphenyl phosphonium ions. The present invention also relates to a heat-meltable fluoropolymer composite composition having similar properties to those mentioned above which is obtained by a process (I) in which a heat-meltable fluoropolymer composite composition is obtained by grinding and mixing a heat-meltable fluoropolymer fine powder and a layered-compound and a process (II) in which such heat-meltable fluoropolymer composite composition thus obtained is melted and mixed under shear stress by means of a melt-mixing extruder.

Abstract: [Object] To provide a fluororesin molded article having a lowered concentration, of eluted fluorine ions subsequent to molding, and to provide a method for producing a fluororesin molded, article, a fluororesin molded article, and a fluororesin composition whereby the concentration of eluted fluorine ions is lowered. [Means] A method for producing a fluororesin molded article in which fluororesin is melt-molded in the presence of a fluorine ion lowering compound, the molded article obtained thereby, and a fluororesin composition. Ammonia, urea, nitrogen compounds that generate ammonia, and alkalis are preferred examples of the fluorine ion lowering compound. The present invention also offers a molded article formed from fetrafluoroethylene/perfluoro(alkylvinyl ether) that has a fluorine ion concentration of 1 ppm or less.

Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.

Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.

Abstract: The present invention provides a vinyl fluoride copolymer comprising: about 40 to about 90 mole % of repeat units derived from vinyl fluoride; and about 10 to about 60 mole % of repeat units derived from monomer selected from the group consisting of (a) and (b) below and mixtures thereof, with the proviso that about 0.1 mole % to 50 mole % of repeat units in the copolymer are derived from monomer selected from (b): (a) monomer selected from the group consisting of, tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene and mixtures thereof; and (b) vinyl monomer containing at least one functional group selected from the group consisting of hydroxyls, thiols, carbonyls, carboxylic acids, carboxylic esters, acid anhydrides, sulfonyls, sulfonic acids, sulfonic esters, phosphoric acids, phosphoric esters, boric acids, boric esters, epoxies, isocyanates, thiocyanates, amines, amides, nitriles and halogen selected from bromide and iodide.

Abstract: A fluororesin coating film for improved permeation resistance that maintains excellent wear resistance and also products containing such film. The fluororesin coating has at least two layers that are formed on a substrate where at least one of the layers contains filler with a new Mohs hardness of ?7 and a tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer and tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer layer directly below the layer described above.

Abstract: A composition comprising an aqueous dispersion of fluoropolymer particles stabilized with a polyoxyethylene alkyl ether surfactant having a polydispersity index, Mw/Mn, of 1.15 or less, useful in compositions comprising electrode material.

Abstract: The present invention is to significantly improve copper-foil adhesion strength (copper-foil peel strength) without roughening or blackening a copper-foil surface, and thereby to provide a copper-clad laminate used favorably in a high frequency range. The copper-clad laminate (101) for a single-sided printed-wiring board is formed by bonding a copper foil (4) onto a surface of an insulating substrate (2) with an LCP/PFA composite film (3) disposed in between. The insulating substrate (2) is made of a fluororesin prepreg 2A. The copper foil (4) is a rolled copper foil, the both surfaces of which are smooth and not roughened or blackened. The insulating substrate (2) and the copper foil (4) are bonded to each other with the composite film (3) disposed in between by firing and pressing them under temperature conditions which are 5° C. to 40° C. higher than the melting point of PFA and lower than the melting point of LCP.

Abstract: The present invention provides fluoropolymer laminates having isotropic properties. For example, an embodiment in which multiple fluoropolymer sheets having a liquid crystalline polymer oriented in the fibrous state in the melt processible fluoropolymer are laminated, despite having the fibrous LCP oriented in one direction in each single extruded sheet, makes it possible to laminate in such a way as to compensate for their orientation directions, the laminate thereby becoming isotropic as regards physical properties. The laminates also have low linear coefficient of expansion and low thermal shrinkage as well as elevated tensile modulus and low dielectric constant.

Abstract: Melt processible fluoropolymer containing functional groups such as hydroxyl and nitrile have antistatic properties that make them suitable in articles and parts for use in conditions where static electricity can be a problem, such as copying machines and fuel lines.

Abstract: A functionalized fluoropolymer, preferably with phosphate functionality, can be coated on a metal oxide containing rubber substrate, which coating, after heating, results in a fluoropolymer-rubber substrate laminate without degradation of the rubber, and with good adhesion between the fluoropolymer and the rubber.

Abstract: An improved circuit substrate is provided wherein glass cloth is completely embedded within fluoropolymer by thermocompression to form a composite structure, which when containing an adhesive agent such as the combination of functional groups and liquid crystal polymer is self-adhering to a metal layer such as of copper.

Abstract: The present invention provides fluoropolymer laminates having isotropic properties. For example, an embodiment in which multiple fluoropolymer sheets having an liquid crystalline polymer oriented in the fibrous state in the melt processible fluoropolymer are laminated, despite having the fibrous LCP oriented in one direction in each single extruded sheet, makes it possible to laminate in such a way as to compensate for their orientation directions, the laminate thereby becoming isotropic as regards physical properties. The laminates also have low linear coefficient of expansion and low thermal shrinkage as well as elevated tensile modulus and low-dielectric constant.

Abstract: The present invention is directed to a binder for electrode materials which comprises tetrafluoroethylene polymer fine particles having an average particle size of not more than about 0.20 ?m and having a standard specific gravity of not more than about 2.20, wherein a mixture prepared from said fine particles with about 17% by weight of the total mixture of an extrusion coagent, when subjected to the measurement of an extrusion pressure by a rheometer, exhibits under the conditions of a draw ratio of 100 to 1 and an extrusion speed of 18±2 mm/min, an extrusion pressure of not less than about 220 kg/cm2.

Abstract: A composition comprising tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and PTFE micropowder with flex life superior to compositions made exclusively of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer having equivalent perfluoro(alkyl vinyl ether) content and melt flow rate.

Abstract: The present invention relates to a molded article of polytetrafluoroethylene or modified polytetrafluoroethylene having a fluoropolymer resin coating, coating comprising a heat-flowable tetrafluoroethylene copolymer wherein the surface of the coated article has a reduced roughness compared to the molded article prior to coating. The coating for the molded article is preferably a fused powder, most preferably formed by electrostatically applying a fluoropolymer powder resin to the molded PTFE article. In a preferred embodiment, the fluoropolymer powder resin comprises a mixture of heat-flowable tetrafluoroethylene copolymer powder and a polytetrafluoroethylene that has a temperature of crystallization of at least 305° C. and a heat of crystallization of at least 50 J/g.

Abstract: A composition of tetrafluoroethylene/perfluoro(alkyl vinyl ether) having at least 4 wt % perfluoro(alkyl vinyl ether) and a melt flow rate of no greater than 4 g/10 min, and 5 to 30 wt % low molecular weight PTFE, has improved gas impermeability and also mechanical strength.

Abstract: Aqueous copolymerization of TFE and PAVE in the presence of a small amount of terpene enables the manufacture of a more uniform melt-fabricable copolymer with a narrower molecular weight distribution. The copolymer exhibits improved flex life.

Abstract: A method for producing an electrically conducting melt-processible fluoropolymer comprising pulverizing a composition of (a) carbon aggregate and (b) coagulum particles of aqueous dispersion polymerized melt-processible fluoropolymer, coating the coagulum particle with the disintegrated particles of carbon black. The preferred composition comprises a structured carbon black such as acetylene black and a melt processible fluoropolymer wherein said melt processible fluoropolymer has two crystallization peaks in a DSC cooling curve when allowed to crystallize from a temperature of not less than its melting point at a cooling rate of 12° C./min; and the ratio of the crystallization peak heights (high temperature side peak/low temperature side peak) is 0.65 or greater; and/or the ratio of the high temperature side crystallization peak area to the total area of the crystallization peaks [high temperature side peak area/(high temperature side peak area+low temperature side peak area)] is 0.