Abstract: A modified fluororesin material containing a modified fluororesin which contains a tetrafluoroethylene unit, a modifying monomer unit based on a modifying monomer copolymerizable with tetrafluoroethylene, and a tertiary carbon atom. The tertiary carbon atom is present in an amount of 0.001 to 0.030 mol % of a total amount of the tetrafluoroethylene unit and the modifying monomer unit. The modified fluororesin material has a linear expansion coefficient at 20° C. to 200° C. that is 10% or more lower than that of a non-modified fluororesin material. The non-modified fluororesin material contains a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with tetrafluoroethylene and containing no tertiary carbon atom. Also disclosed is a material for a circuit board including the modified fluororesin material, a laminate for a circuit board, a circuit board, and a method for producing the modified fluororesin material.

Abstract: A molded article containing a crystal of a fluoropolymer. The fluoropolymer contains at least one selected from vinylidene fluoride/tetrafluoroethylene copolymer, polychlorotrifluoroethylene, an ethylene/tetrafluoroethylene copolymer, a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer. Further, the crystal is a nano-oriented crystal having a size of 300 nm or smaller.

Abstract: Provided is a processing additive which can bring about improvements in moldability at Mooney viscosity levels at which the dispersibility in a melt-processable resin is high and which further can work at reduced addition levels. The processing additive contains a fluoropolymer having an acid value of not lower than 0.5 KOH mg/g.

Abstract: The present invention provides a processing additive which can bring about improvements in moldability at Mooney viscosity levels at which the dispersibility in a melt-processable resin is high and which further can work at reduced addition levels. The present invention is a processing additive comprising a fluoropolymer having an acid value of not lower than 0.5 KOH mg/g.

Abstract: A molded article containing a crystal of a fluoropolymer. The fluoropolymer contains at least one selected from vinylidene fluoride/tetrafluoroethylene copolymer, polychlorotrifluoroethylene, an ethylene/tetrafluoroethylene copolymer, a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer. Further, the crystal is a nano-oriented crystal having a size of 300 nm or smaller.

Abstract: The invention provides a molded article having excellent mechanical strength, heat resistance, surface roughness, and ferroelectricity. The molded article contains a crystal of a vinylidene fluoride/tetrafluoroethylene copolymer. The crystal is a ? crystal and is a nano-oriented crystal that has a size of 100 nm or smaller. The molded article has an arithmetic average roughness of 3.0 ?m or lower.

Abstract: The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.

Abstract: The present invention provides a processing aid for polyolefins capable of improving the processability in processing polyolefins at a temperature lower than 220° C. and a high shear rate. The processing aid for polyolefins is intended to be used in processing a polyolefin at a temperature lower than 220° C., and contains a fluoropolymer that includes a polymerized unit (a) based on CF2?CFCF3 and a polymerized unit, (b) based on at least one selected from the group consisting of monomers represented by CH2?CX11Y11 and monomers represented by CF2?CX21Y21.

Abstract: The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.

Abstract: The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.

Abstract: The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.

Abstract: The present invention provides a processing aid for polyolefins which can eliminate melt fracture occurring at the start of molding in a short time even when a polyolefin, which is a melt-processable polymer, is extrusion-molded at a high speed. The present invention also aims to provide a polyolefin composition containing such a processing aid for polyolefins and a polyolefin. The processing aid for polyolefins contains an ethylene/tetrafluoroethylene copolymer as the only fluoropolymer, the ethylene/tetrafluoroethylene copolymer having a melting point of 170° C. to 270° C.

Abstract: The present invention provides a processing aid for polyolefins capable of improving the processability in processing polyolefins at a temperature lower than 220° C. and a high shear rate. The processing aid for polyolefins is intended to be used in processing a polyolefin at a temperature lower than 220° C., and contains a fluoropolymer that includes a polymerized unit (a) based on CF2?CFCF3 and a polymerized unit, (b) based on at least one selected from the group consisting of monomers represented by CH2?CX11Y11 and monomers represented by CF2?CX21Y21.

Abstract: The present invention aims to provide a polyolefin composition including: a processing aid for polyolefins that enables disappearance of melt fracture occurred at the start of molding in a short time even when a polyolefin that is a melt-fabricable polymer is extrusion-molded at a high rate; and a specific polyolefin. The present invention relates to a processing aid for polyolefins, including a perfluoroelastomer. The processing aid is intended to be used for extrusion-molding at least one polyolefin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, metallocene linear low-density polyethylene, polypropylene, and polyvinyl chloride.

Abstract: The present invention provides a processing aid for polyolefins which can eliminate melt fracture occurring at the start of molding in a short time even when a polyolefin, which is a melt-processable polymer, is extrusion-molded at a high speed. The present invention also aims to provide a polyolefin composition containing such a processing aid for polyolefins and a polyolefin. The processing aid for polyolefins contains an ethylene/tetrafluoroethylene copolymer as the only fluoropolymer, the ethylene/tetrafluoroethylene copolymer having a melting point of 170° C. to 270° C.

Abstract: The present invention provides a processing additive which can bring about improvements in moldability at Mooney viscosity levels at which the dispersibility in a melt-processable resin is high and which further can work at reduced addition levels. The present invention is a processing additive comprising a fluoropolymer having an acid value of not lower than 0.5 KOH mg/g.

Abstract: There are provided a resin film being excellent in blocking resistance, scratch resistance, transparency, water resistance and chemical resistance and a member having the resin film as an outermost layer. The resin film comprises a vinylidene fluoride (VdF) copolymer and an acrylic polymer as essential components, in which a heat of fusion of crystal derived from the VdF copolymer in the resin film is from 15 to 30 J/g when measured with a differential scanning calorimeter (DSC), and light transmittance (light transmittance at 600 nm of 50 ?m thick resin film) is not less than 85%. The member has the resin film as an outermost layer.

Abstract: There are provided a resin film being excellent in blocking resistance, scratch resistance, transparency, water resistance and chemical resistance and a member having the resin film as an outermost layer. The resin film comprises a vinylidene fluoride (VdF) copolymer and an acrylic polymer as essential components, in which a heat of fusion of crystal derived from the VdF copolymer in the resin film is from 15 to 30 J/g when measured with a differential scanning calorimeter (DSC), and light transmittance (light transmittance at 600 nm of 50 ?m thick resin film) is not less than 85%. The member has the resin film as an outermost layer.

Abstract: Spherulites in a molded article obtained from a melt-processable crystalline fluorine-containing resin composition are minimized to give the transparent molded article having a smooth surface and being resistant to contamination. An agent for minimizing spherulite size which comprises an amorphous fluorine-containing polymer or a fluorine-containing multi-segment polymer. The fluorine-containing multi-segment polymer comprises an amorphous segment and a crystalline segment.

Abstract: Spherulites in a molded article obtained from a melt-processable crystalline fluorine-containing resin composition are minimized to give the transparent molded article having a smooth surface and being resistant to contamination. An agent for minimizing spherulite size which comprises an amorphous fluorine-containing polymer or a fluorine-containing multi-segment polymer. The fluorine-containing multi-segment polymer comprises an amorphous segment and a crystalline segment.