Abstract: The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following step 201 to step 301, in which step 201 is performed in a condition where: the surface temperature of a material under inspection—atmospheric temperature>2° C., and inspection using ultrasound waves in step 301 satisfies: a refractive attenuation rate?1.5%. Step 201: blowing a fluid from a blowing port onto the material to be inspected. Step 301: inspecting the material to be inspected using the ultrasound waves after step 201 or at the same time as the step 201.

Abstract: A composite material containing reinforcing fibers A and a matrix resin, the reinforcing fibers A being discontinuous fibers having a fiber length of at least 5 mm and containing reinforcing fibers A1 having a bundle width of less than 0.3 mm and a reinforcing fiber bundle A2 having a fiber width of 0.3-3.0 mm, inclusive, wherein the coefficient of variation CViA2 of VfiA2 is 35% or less in at least a minimum bundle width zone (i=1) and a maximum bundle width zone (i=n) when the reinforcing fiber bundle A2 is divided into a pre-set plurality of bundle width zones (total number of bundle width zones n?3) and the volume ratio of the reinforcing fiber bundle A2 in each bundle width zone is VfiA2. Also, a method for producing a molded article which uses the composite material.

Abstract: Provided is a cold press molded body having excellent fastening strength and fastening stability as well due to the use of a discontinuous carbon fiber and a discontinuous glass fiber for adjusting the volume, preferably the volume resistivity, of an end region (flowing region).

Abstract: The present invention provides an impact-absorbing member having a hollow-structured impact-absorbing section comprising an outer cylinder section and a hollow section, wherein the outer cylinder section includes a thermoplastic resin and carbon fibers having a weight-average fiber length of 1 mm to 100 mm, and throughout the entire periphery of the outer cylinder part, there is an annular region where the carbon fibers are dispersed in an in-plane direction and there is no bonding portion such as a welded surface; therefore, there is no breaking starting point when impact is borne and the impact absorption ability is stable.

Abstract: Provided is a method for manufacturing a fiber-reinforced resin molded article by cold press molding a fiber-reinforced resin material including reinforcing fibers and a thermoplastic resin using molds containing an upper mold and a lower mold. In the method, the respective parameters for: heating temperature; charge time; air-cooling rate; pressurization time; flow-stopping temperature; and a moldable time satisfies specified numerical ranges simultaneously.

Abstract: A molding material for a multi-layered structure, includes a thermoplastic resin layer (X) including carbon fibers (A) having a weight-average fiber length of 0.01 mm to less than 3 mm; and a thermoplastic resin layer (Y) including carbon fibers (B) having a weight-average fiber length of 3 mm to 100 mm, in which a density parameter PY of the thermoplastic resin layer (Y) expressed by the following Equation (1) is 1×102 to less than 1×104, and in which a density parameter PX of the thermoplastic resin layer (X) expressed by the following Equation (1) is more than 1×101: P=(q×Ln3)/h??(1), where q is the number of flow units of carbon fibers included in the thermoplastic resin layer per 1 mm2 unit area, Ln is a number-average fiber length (mm) of the carbon fibers, and h is a thickness (mm) of the thermoplastic resin layer.

Abstract: A method for producing a fiber-reinforced resin shaped product, by clamping and press-molding a molding material containing reinforcing fibers and a thermoplastic resin as a matrix in molds having an upper mold and a lower mold. The method includes: disposing the molding material heated in a plastic state, between the upper mold and the lower mold; initiating the clamping to apply a force in a substantially clamping direction to a certain site of the molding material; starting deformation of the molding material in the substantially clamping direction; applying a force in the substantially clamping direction to a fixing site which is at least a part of a substantially outer peripheral end portion of the molding material but is different from the certain site; pressing and fixing the fixing site, and completing the clamping to obtain a fiber-reinforced resin shaped product having an edge portion.

Abstract: The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following step 201 to step 301, in which step 201 is performed in a condition where: the surface temperature of a material under inspection—atmospheric temperature >2° C., and inspection using ultrasound waves in step 301 satisfies: a refractive attenuation rate ?1.5%. Step 201: blowing a fluid from a blowing port onto the material to be inspected. Step 301: inspecting the material to be inspected using the ultrasound waves after step 201 or at the same time as the step 201.

Abstract: A conveyance device includes a plurality of holding mechanisms and one or more pressing mechanisms, the holding mechanisms each include a holder that holds a molding material and a holder movement mechanism that moves the holder, and the pressing mechanisms each include a pusher that comes into contact with and pushes the molding material and a pusher movement mechanism that moves the pusher.

Abstract: To provide a method of manufacturing a press molding by molding a molding material comprising reinforced fibers and a thermoplastic resin by a cold press method. The method of manufacturing a press molding comprising reinforced fibers and a thermoplastic resin, includes the steps of: holding the molding material heated at a temperature not lower than the softening temperature with a plurality of grippers installed on a carrier; carrying the molding material between the upper mold and the lower mold of a mold for molding; pushing the molding material with pushers to preform it at a predetermined preforming rate; and press molding the preformed molding by closing the upper mold and the lower mold and applying pressure.

Abstract: A molded article including carbon fibers and thermoplastic resin, the molded article being provided with a hole h1, wherein the molded article has a region a around the hole h1, the relationship between the linear expansion coefficient C1 in the plate thickness direction in region a and the linear expansion coefficient C2 in a molded article region other than the region a is C1/C2<1, and the relationship of the carbon fiber volume fraction Vf1 of region a and the carbon fiber volume fraction Vf2 of a molded article region other than the region a is 0.2<Vf1/Vf2.

Abstract: There is provided a plate-shaped carbon fiber reinforced molding material comprising a thermoplastic resin, carbon fibers (A) and carbon fibers (B), wherein: i) the carbon fibers (A) have fiber lengths ranging from 0.01 mm to less than 3 mm, ii) the carbon fibers (B) have fiber lengths ranging from 3 mm to less than 100 mm, iii) 1.0<LwA/LnA<3 is satisfied where LwA and LnA are a weight-average fiber length and a number-average fiber length of the carbon fibers (A), respectively, and iv) the carbon fibers (B) are two-dimensionally randomly oriented.

Abstract: A shaped product of a fiber-reinforced composite material includes a well-shaped part and a surface-shaped part, in which the well-shaped part includes a fiber-reinforced composite material C including both discontinuous reinforcing fibers and a thermoplastic resin, and the surface-shaped part includes a thermoplastic-resin-based material, and the shaped product includes no irregular-shape portion in the well-shaped part and no weld at a boundary edge between the well-shaped part and the surface-shaped part.

Abstract: Provided is a method for manufacturing a fiber-reinforced resin molded article by cold press molding a fiber-reinforced resin material including reinforcing fibers and a thermoplastic resin using molds containing an upper mold and a lower mold. In the method, the respective parameters for: heating temperature; charge time; air-cooling rate; pressurization time; flow-stopping temperature; and a moldable time satisfies specified numerical ranges simultaneously.

Abstract: A method for producing a fiber-reinforced resin shaped product, by clamping and press-molding a molding material containing reinforcing fibers and a thermoplastic resin as a matrix in molds having an upper mold and a lower mold. The method includes: disposing the molding material heated in a plastic state, between the upper mold and the lower mold; initiating the clamping to apply a force in a substantially clamping direction to a certain site of the molding material: starting deformation of the molding material in the substantially clamping direction; applying a force in the substantially clamping direction to a fixing site which is at least a part of a substantially outer peripheral end portion of the molding material but is different from the certain site; pressing and fixing the fixing site, and completing the clamping to obtain a fiber-reinforced resin shaped product having an edge portion.

Abstract: To provide a method of manufacturing a press molding by molding a molding material comprising reinforced fibers and a thermoplastic resin by a cold press method. The method of manufacturing a press molding comprising reinforced fibers and a thermoplastic resin, includes the steps of: holding the molding material heated at a temperature not lower than the softening temperature with a plurality of grippers installed on a carrier; carrying the molding material between the upper mold and the lower mold of a mold for molding; pushing the molding material with pushers to preform it at a predetermined preforming rate; and press molding the preformed molding by closing the upper mold and the lower mold and applying pressure.

Abstract: A method for manufacturing a press-molded product by cold-pressing a composite material containing a discontinuous carbon fiber and a thermoplastic resin, is provided. The method satisfies equations (1) and (2) and includes Steps 1 to 5: Step 1 is a step of placing a heated composite material in a mold; Step 2 is a step of allowing 1 second or less between pressurization start time t0 and time t1 of reaching flow starting pressure Pf; Step 3 is a step of reaching maximum pressure Pm at time t2; Step 4 is a pressure holding step of pressing the composite material at an average holding pressure Pk from time t2 to time t3; and Step 5 is a step of opening the mold and taking out a molded product from the mold; equation (1):??4<Pf/t1<7,500 [MPa/sec]; and equation (2):??45<Pk×(t3?t2)<5,400 [MPa·sec].

Abstract: A molded article including carbon fibers and thermoplastic resin, the molded article being provided with a hole h1, wherein the molded article has a region a around the hole h1, the relationship between the linear expansion coefficient C1 in the plate thickness direction in region a and the linear expansion coefficient C2 in a molded article region other than the region a is C1/C2<1, and the relationship of the carbon fiber volume fraction Vf1 of region a and the carbon fiber volume fraction Vf2 of a molded article region other than the region a is 0.2<Vf1/Vf2.

Abstract: A conveyance device includes a plurality of holding mechanisms and one or more pressing mechanisms, the holding mechanisms each include a holder that holds a molding material and a holder movement mechanism that moves the holder, and the pressing mechanisms each include a pusher that comes into contact with and pushes the molding material and a pusher movement mechanism that moves the pusher.

Abstract: There is provided a material for molding including: carbon fiber bundles which are easily impregnated including carbon fibers and at least one impregnation aid in an amount of 3 to 15 parts by mass based on 100 parts by mass of the carbon fibers, the at least one impregnation aid satisfying specific requirements; and a polycarbonate is adhered thereto in an amount of 50 to 2000 parts by mass.