Abstract: The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length LK of the kneading zone to an effective length LS of the screw (LK/LS×100) is 21.0 to 50.0%.

Abstract: An insulated conduit for use in offshore, deep water environments includes a pipe and a fluoropolymer composition. The pipe has an outer surface with the fluoropolymer composition disposed about the outer surface of the pipe for providing a thermal insulation layer. The fluoropolymer composition includes a fluoroplastic polymer present in an amount of at least 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition also includes a fluoroelastomer present in an amount of a fluoroelastomer present in an amount of from about 20 to about 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition has a thermal conductivity less than about 0.20 W/mK at 205° C.

Abstract: The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length LK of the kneading zone to an effective length LS of the screw (LK/LS×100) is 21.0 to 50.0%.

Abstract: An insulated conduit for use in offshore, deep water environments includes a pipe and a fluoropolymer composition. The pipe has an outer surface with the fluoropolymer composition disposed about the outer surface of the pipe for providing a thermal insulation layer. The fluoropolymer composition includes a fluoroplastic polymer present in an amount of at least 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition also includes a fluoroelastomer present in an amount of a fluoroelastomer present in an amount of from about 20 to about 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition has a thermal conductivity less than about 0.20 W/mK at 205° C.

Abstract: To provide a method for producing a crosslinked product of a fluoroelastomer having no hydrogen atom bonded to a carbon atom, by which formation of white foreign matters is suppressed, and a fluoroelastomer composition suitable for the production method. A method for producing a crosslinked product, which comprises crosslinking a fluoroelastomer composition containing a fluoroelastomer having no hydrogen atom bonded to a carbon atom, such as a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, and a fatty acid metal salt having a melting point of less than 200° C., at a crosslinking temperature higher than the melting point of the fatty acid metal salt, and a fluoroelastomer composition containing the fluoroelastomer and a fatty acid metal salt having a melting point of less than 200° C.

Abstract: To provide a fluoro-rubber composition whereby good hardness and good elongation are obtainable in a rubber article after cross-linking, and a cross-linked rubber article using the same. A fluoro-rubber composition comprising a fluoro-rubber, a hydrophobic silica and a cross-linking agent, wherein the hydrophobic silica is one having hydrophobized with hexamethyldisilazane or silicone oil, and the content of the hydrophobic silica is from 1 to 50 parts by mass and the content of the cross-linking agent is from 0.1 to 5 parts by mass, per 100 parts by mass of the fluoro-rubber; and a cross-linked rubber article obtained by cross-linking such a fluoro-rubber composition.

Abstract: To provide a fluororubber composition excellent in formability, with which it is possible to produce a crosslinked fluororubber article excellent in surface smoothness, while maintaining rubber properties such as strength. A fluororubber composition comprising a fluororubber (A) and a glycerol ester (B) of a C14-20 unsaturated fatty acid, wherein the content of the glycerol ester (B) is from 0.8 to 4.0 parts by mass, based on 100 parts by mass of the fluororubber (A), and a crosslinked fluororubber article obtained by crosslinking the fluororubber composition.

Abstract: To provide a fluorinated elastomer composition which is excellent in flexibility, heat resistance and flame retardance, and a molded product, cross-linked product and covered electric wire, using such a fluorinated elastomer composition. A fluorinated elastomer composition comprising a tetrafluoroethylene/propylene copolymer (a), an ethylene/tetrafluoroethylene copolymer (b), an ethylene copolymer (c) containing epoxy groups and a flame retardant (d), wherein the mass ratio [(a)/(b)] of (a) to (b) is from 70/30 to 40/60, the mass ratio [(b)/(c)] of (b) to (c) is from 100/0.1 to 100/10, and the content of (d) is from 0.1 to 30 parts by mass per 100 parts by mass of the total content of (a), (b) and (c).

Abstract: To provide a fluorinated elastomer composition which is excellent in flexibility, heat resistance and flame retardance, and a molded product, cross-linked product and covered electric wire, using such a fluorinated elastomer composition. A fluorinated elastomer composition comprising a tetrafluoroethylene/propylene copolymer (a), an ethylene/tetrafluoroethylene copolymer (b), an ethylene copolymer (c) containing epoxy groups and a flame retardant (d), wherein the mass ratio [(a)/(b)] of (a) to (b) is from 70/30 to 40/60, the mass ratio [(b)/(c)] of (b) to (c) is from 100/0.1 to 100/10, and the content of (d) is from 0.1 to 30 parts by mass per 100 parts by mass of the total content of (a), (b) and (c).

Abstract: To provide a polymer cement composition which, when hardened, is less susceptible to cracking by oil such as petroleum, and a cementing method using it. A polymer cement composition comprising cement, a polymer and water, wherein the polymer is a fluorinated polymer, and the degree of swelling obtained by the following measuring method is from 0 to 30%. (Method for measuring degree of swelling): A 1 mm-thick sheet made of the polymer is immersed in kerosene at a temperature within a range of 23±2° C. for 24 hours, whereby the volume change (%) as between before and after the immersion is measured, and the measured value is taken as the degree of swelling.

Abstract: To provide a fluoro-rubber composition whereby good hardness and good elongation are obtainable in a rubber article after cross-linking, and a cross-linked rubber article using the same. A fluoro-rubber composition comprising a fluoro-rubber, a hydrophobic silica and a cross-linking agent, wherein the hydrophobic silica is one having hydrophobized with hexamethyldisilazane or silicone oil, and the content of the hydrophobic silica is from 1 to 50 parts by mass and the content of the cross-linking agent is from 0.1 to 5 parts by mass, per 100 parts by mass of the fluoro-rubber; and a cross-linked rubber article obtained by cross-linking such a fluoro-rubber composition.

Abstract: To obtain a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, and which is excellent in the mechanical strength at a temperature at which it is used; and an electrolyte membrane which is excellent in the dimensional stability when it is swollen by water, and of which an increase in the resistance by a reinforcing material is suppressed. A nonwoven fabric 28 containing fibers 26 of an ethylene/tetrafluoroethylene copolymer having a storage elastic modulus E? at 25° C. of at least 8×108 Pa and a melt viscosity measured at 300° C. of higher than 60 Pa·s and at most 300 Pa·s, wherein the average fiber diameter of the fibers is from 0.01 to 3 ?m; and an electrolyte membrane reinforced by the nonwoven fabric 28.

Abstract: To provide a process for producing a fluorinated copolymer nanocomposite comprising a fluorinated copolymer and inorganic fine particles dispersed therein to a high degree, and a process for producing a molded fluororesin product. The process for producing a fluorinated copolymer nanocomposite comprising a fluorinated copolymer and inorganic fine particles, characterized in that a mixture (A) containing a fluorinated copolymer comprised of repeating units based on tetrafluoroethylene and repeating units based on ethylene, inorganic fine particles, and a solvent which can dissolve the fluorinated copolymer under ordinary or elevated pressure at a temperature of not higher than the melting point of the fluorinated copolymer, is heated to at least a temperature at which the fluorinated copolymer dissolves in the solvent, and the solvent is subsequently removed. The process for producing a molded fluororesin product by using the fluorinated copolymer nanocomposite to produce a molded product.

Abstract: To obtain a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, and which is excellent in the mechanical strength at a temperature at which it is used; and an electrolyte membrane which is excellent in the dimensional stability when it is swollen by water, and of which an increase in the resistance by a reinforcing material is suppressed. A nonwoven fabric 28 containing fibers 26 of an ethylene/tetrafluoroethylene copolymer having a storage elastic modulus E? at 25° C. of at least 8×108 Pa and a melt viscosity measured at 300° C. of higher than 60 Pa·s and at most 300 Pa·s, wherein the average fiber diameter of the fibers is from 0.01 to 3 ?m; and an electrolyte membrane reinforced by the nonwoven fabric 28.

Abstract: To provide a method for easily producing an ethylene/tetrafluoroethylene copolymer porous material having excellent chemical resistance and filtration performance and has a high heat resistance, within a wide range of the porosity, and an ethylene/tetrafluoroethylene copolymer porous material obtained by such a process. A process for producing an ethylene/tetrafluoroethylene copolymer porous material which comprises a step of dissolving an ethylene/tetrafluoroethylene copolymer having repeating units based on ethylene and repeating units based on tetrafluoroethylene at a temperature of at most 300° C. in a solvent which can dissolve the ethylene/tetrafluoroethylene copolymer at a temperature of at most 300° C., to achieve a predetermined concentration to obtain a solution, a step of forming the solution to obtain a formed product, and a step of cooling the formed product to a temperature of at most the phase separation temperature of the solution to solidify the ethylene/tetrafluoroethylene copolymer.

Abstract: It is an object of the present invention to provide a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, which is excellent in the strength and of which the maximum pore diameter is small. A nonwoven fabric made of an ethylene/tetrafluoroethylene copolymer, characterized in that the nonwoven fabric is mutually fused continuous fibers of an ethylene/tetrafluoroethylene copolymer which has a melt viscosity of from higher than 100 to 1,500 Pa·s at 240° C.

Abstract: It is an object of the present invention to provide a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, which is excellent in the strength and of which the maximum pore diameter is small. A nonwoven fabric made of an ethylene/tetrafluoroethylene copolymer, characterized in that the nonwoven fabric is mutually fused continuous fibers of an ethylene/tetrafluoroethylene copolymer which has a melt viscosity of from higher than 100 to 1,500 Pa˜s at 240° C.