The invention relates to fluoropolymer composites having a fluoropolymer matrix containing a functionalized fluoropolymer composition, and reinforced with fibers. The fibers can be chopped fibers, long fibers, or a mixture thereof, and the fluoropolymer matrix preferably is based on polyvinylidene fluoride. Any type of fibers, sized or unsized may be used with the functionalized fluoropolymer matrix composition to form the fluoropolymer composite.

A method for preparing a compact of resin compound comprising the following steps (a) to (c): (a) a preparation step of mounting a sheet-shaped or block-shaped compact of resin compound including a resin composition, which contains a filler having magnetic anisotropy and is solidified by curing or by being advanced to a B-stage, on a transportation unit which is movable in the horizontal direction, and covering at least a top surface of the compact of resin compound with a cover material; (b) a step of applying a magnetic field to the compact of resin compound obtained in the step (a) with a bulk superconductor magnet having a central magnetic flux density of 1 T or more; and (c) a step of moving the compact of resin compound in the horizontal direction and scanning it while applying vibrations to the compact of resin compound mounted on a region of a central part of the bulk superconductor magnet under application of a magnetic field.

A method for preparing a compact of resin compound comprising the following steps (a) to (c): (a) a preparation step of mounting a sheet-shaped or block-shaped compact of resin compound including a resin composition, which contains a filler having magnetic anisotropy and is solidified by curing or by being advanced to a B-stage, on a transportation unit which is movable in the horizontal direction, and covering at least a top surface of the compact of resin compound with a cover material; (b) a step of applying a magnetic field to the compact of resin compound obtained in the step (a) with a bulk superconductor magnet having a central magnetic flux density of 1 T or more; and (c) a step of moving the compact of resin compound in the horizontal direction and scanning it while applying vibrations to the compact of resin compound mounted on a region of a central part of the bulk superconductor magnet under application of a magnetic field.

The present application relates to a fiber reinforced thermoplastic composite sheet and a method for preparing the same. The fiber reinforced thermoplastic composite sheet has on its surface a marble texture effect obtained by laminating cut pieces of a continuous fiber reinforced thermoplastic composite unidirectional tape, wherein the fibers and the resin used in the continuous fiber reinforced thermoplastic composite unidirectional tape have different colors. The thermoplastic composite sheet may be prepared using a simple and quick method, and meet individual requirements of surface appearance of the final product.

The present application relates to a fiber reinforced thermoplastic composite sheet and a method for preparing the same. The fiber reinforced thermoplastic composite sheet has on its surface a marble texture effect obtained by laminating cut pieces of a continuous fiber reinforced thermoplastic composite unidirectional tape, wherein the fibers and the resin used in the continuous fiber reinforced thermoplastic composite unidirectional tape have different colors. The thermoplastic composite sheet may be prepared using a simple and quick method, and meet individual requirements of surface appearance of the final product.

An object of the present invention is to provide an epoxy resin composition excellent in elastic modulus and strength, and a prepreg and a fiber reinforced composite material with the epoxy resin composition. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: aromatic diamine [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin

(1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or more.

(2): at least a part of the component [C] satisfies that the Hansen solubility parameter distance L to the component [A] is 20.0 or less.

(3): the ratio H/E between the amount by mole, E, of the epoxy group of the component [A] and the amount by mole, C, of the component [C] satisfying both the condition (1) and the condition (2) is 0.01 or more and 0.20 or less.

(4): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition excellent in elastic modulus and strength, and a prepreg and a fiber reinforced composite material with the epoxy resin composition. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: aromatic diamine [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin

(1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or more.

(2): at least a part of the component [C] satisfies that the Hansen solubility parameter distance L to the component [A] is 20.0 or less.

(3): the ratio H/E between the amount by mole, E, of the epoxy group of the component [A] and the amount by mole, C, of the component [C] satisfying both the condition (1) and the condition (2) is 0.01 or more and 0.20 or less.

(4): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications and is excellent in elastic modulus, strength, and pot life.

The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, and (1): at least a part of the component [C] has two or more alcoholic hydroxyl groups in the molecule. (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less. (3): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications and is excellent in elastic modulus, strength, and pot life.

The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, and (1): at least a part of the component [C] has two or more alcoholic hydroxyl groups in the molecule. (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less. (3): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

A composite material includes a carbon fiber bundle including a plurality of continuous carbon fibers; and a structure, formed on each of the carbon fibers, including a plurality of carbon nanotubes and having a network structure in which the carbon nanotubes are in direct contact with each other and in which the carbon nanotubes directly adhere to surfaces of the carbon fibers. The carbon nanotubes have a bent shape including a bent portion, and a thickness of the structure is within a range of 50 nm to 200 nm.