Abstract:
Artículo formado de manera integrada, en el que una estructura tipo sándwich (III) como primer elemento yotro elemento estructural como segundo elemento están unidos entre sí; teniendo dicho primer elementouna forma plana; y cambiando la forma del segundo elemento en la dirección del grosor, comprendiendodicha estructura tipo sándwich (III) un componente de núcleo (I) y componentes reforzados con fibras (II)compuestos cada uno por fibras de refuerzo continuas (A) y una resina de matriz (B) y dispuestos en ambassuperficies de dicho componente de núcleo (I), teniendo dicho componente de núcleo (I) huecos, un grosorde 0,1 a 1,5 mm y un peso específico de 0,01 a 1,2; y la fuerza adhesiva entre dicho componente de núcleo(I) y dichos componentes reforzados con fibras (II) medida según la norma ASTM D 3846 es de 1 MPa omás.
Abstract:
A carbon fiber base which comprises a continuous-carbon-fiber layer constituted of continuous carbon fibers and, disposed on one or each surface of the continuous-carbon-fiber layer, a carbon short-fiber web in which short carbon fibers having an average fiber length of 2-12 mm have been dispersed in the shape of single fibers; a prepreg which comprises the carbon fiber base and a matrix resin infiltrated into the carbon fiber base; and a carbon-fiber-reinforced composite material which comprises the carbon fiber base and a matrix resin infiltrated into the carbon fiber base and cured.
Abstract:
A carbon fiber base which comprises a continuous-carbon-fiber layer constituted of continuous carbon fibers and, disposed on one or each surface of the continuous-carbon-fiber layer, a carbon short-fiber web in which short carbon fibers having an average fiber length of 2-12 mm have been dispersed in the shape of single fibers; a prepreg which comprises the carbon fiber base and a matrix resin infiltrated into the carbon fiber base; and a carbon-fiber-reinforced composite material which comprises the carbon fiber base and a matrix resin infiltrated into the carbon fiber base and cured.
Abstract:
Provided is a molding material comprising a composite of 1 to 50 wt% of a continuous reinforcing fiber bundle (A) and 0.1 to 20 wt% of a poly (phenylene ether ether ketone) oligomer (B); and 30 to 98.9 wt% of a thermoplastic resin (C) adhering to the composite, wherein the component (B) has a melting point of not higher than 270°C. Also provided are a method for molding the molding material, a method for producing the molding material, and a method for producing a fiber-reinforced composite material. A molded article having high heat resistance and dynamic properties can be easily produced without impairing the economic efficiency and productivity during the process for producing a molding material. In addition, a fiber-reinforced composite material can be produced with more ease and high productivity.
Abstract:
PROBLEM TO BE SOLVED: To obtain a reinforced fiber which has excellent economic efficiency and productivity, is suitable for direct molding and combines bundling property and dispersibility, and to provide a molding material and a method for producing a molding. SOLUTION: The reinforced fiber for direct molding is obtained by attaching 0.1-20 wt.% of a block copolymer constituted of (a) 10-99 wt.% of an oxyalkylene group-containing block component and (b) 1-90 wt.% of at least one block component selected from (b1) a polyether, (b2) a polyester, (b3) a polyamide and (b4) a polyurethane to a reinforced fiber. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide chopped carbon fibers which are suitable for carbon fiber- reinforced resins and have an excellent flowing property and an excellent bundling property, and to provide a method for producing a carbon fiber bundle useful as its raw material. SOLUTION: The method for producing the sized carbon fiber bundle is characterized by sizing a continuous carbon fiber bundle comprising bundled 15,000 to 1,000,000 single fibers with a sizing liquid having a viscosity of 0.01 to 0.1 poises and further sizing the bundle with a sizing liquid having a viscosity of 0.5 to 20 poises. Chopped carbon fibers are obtained by cutting the sized carbon fiber bundle produced by the production method in a length of 1 to 10 mm. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a short carbon fiber excellent in convergence and capable of making molded products manifest excellent electrical properties, and to provide a resin composition. SOLUTION: This short carbon fiber has 0.1-5 Ω bulk electrical resistance defined in the specification and the resin composition comprises at least two constitutive elements i.e., the short carbon fiber and a thermoplastic resin. A fiber-reinforced resin composition having excellent electrical properties is obtained by using the short carbon fiber.
Abstract:
PROBLEM TO BE SOLVED: To provide an electroconductive fiber bundle having excellent electroconductivity and mechanical properties, to provide a resin composition and a molding compound each using the same, and to provide a molded product using the composition or the molding compound. SOLUTION: This electroconductive fiber bundle for ester-based or carbonate- based resins is characterized by being sized with a saturated polyester-based sizing agent containing 10-1,000 μg/g of elemental antimony and/or elemental germanium determined by ICP emission spectroscopy or atomic absorption spectrophotometry. The 2nd objective resin composition and the 3rd objective molding compound each characterized by comprising such electroconductive fiber bundles as described above and an ester-based and/or carbonate-based resin, and the other objective molded product is characterized by being obtained by the use of the above resin composition or molding compound.
Abstract:
PROBLEM TO BE SOLVED: To obtain a sizing agent suitable for chopped carbon fiber by preparing a liquid epoxy resin, a solid epoxy resin and a polyurethane resin as a resin component. SOLUTION: This sizing agent contains a liquid epoxy resin and a solid epoxy resin each comprising at least one kind of resin selected from a group of bisphenol A type, bisphenol F type and bisphenol S type epoxy resins or a group of phenol novolak type, cresol novolak type and resorcinol type epoxy resins and a polyurethane resin having >=100% film elongation as a resin component and is constituted so that these weight ratios satisfy the relationships represented by the formulas 0.005