Abstract: A laminate includes a core obtained by impregnating a mat of fibers with a thermoplastic resin (B); and a skin obtained by impregnating continuous fiber(s) with a thermoplastic resin (A), wherein sheet-form intermediate substrates in the laminate have a thermal expansibility, the usable temperature region of said thermoplastic resin (A) and that of said thermoplastic resin (B) overlap over a temperature range of at least 5° C., said thermoplastic resin (A) has a temperature region that does not melt at a lower limit of said usable temperature region, said fibers contained in said mat penetrate through interface layers formed by said thermoplastic resin (A) and said thermoplastic resin (B), and said thermoplastic resin (A) and said thermoplastic resin (B) form interface layers each with a concave-convex shape having a maximum height Ry of not less than 50 ?m and an average roughness Rz of not less than 30 ?m.

Abstract: A problem to be solved by the present invention is to provide a prepreg and an integrally molded article, wherein the prepreg exhibits suitable flexibility and adhesiveness, excels in formability on a complicated mold face and adhesion to a mold face, causes no positional shift, and can be efficiently reinforced and stiffened at an intended position. A main object of the present invention is to provide a prepreg including (A) reinforcing fibers, (B) a thermosetting resin, and (C) a thermoplastic resin, wherein the (C) thermoplastic resin exists in at least a part of a face of the prepreg, and wherein the prepreg satisfies the condition [I], and satisfies the condition [II] or the condition [III]: [I]: the (B) thermosetting resin has a peak in the temperature range of more than 100° C. and 180° C.

Abstract: A molded product having both small specific gravity and high stiffness and also suffering few sink marks is described along with a method for the production thereof, where the molded product includes a porous body (A) integrated with an injection molded body (B), the porous body (A) having an apparent density of 0.05 to 0.8 g/cm3, the average thickness (tA) of the porous body (A) and the average thickness (tB) of the injection molded body (B) satisfying the relation tA?3×tB, and the injection molded body (B) covering at least one face of the porous body (A).

Abstract: A method is described for manufacturing a molded product having a recessed/protruding part from a molded substrate (A) including reinforcing fibers and a matrix resin by press molding, the method comprising: a step (I) of placing the molded substrate (A) between molds including an upper mold and a lower mold and deforming the molded substrate (A) in an in-plane direction by heating and pressing the molds; and a step (II) of deforming the molded substrate (A) in an out-of-plane direction by depressurizing the molds subsequent to the step (I), wherein a deformation rate ratio T represented by the following formula (1) is within a range of 0.1 to 1: T=X/Z ??(1) where X and Z are as defined.

Abstract: A prepreg and an integrally molded article are described, the prepreg including a thermoplastic resin existing on one face of a layer in which reinforcing fibers are impregnated with a thermosetting resin, wherein the prepreg exhibits, in injection molding or press molding, thermal weldability with a member containing a thermoplastic resin, and wherein the thermosetting resin has a specific peak on a loss tangent (tan ?) curve obtained by dynamic mechanical analysis (DMA), so that the prepreg exhibits suitable flexibility and adhesiveness, excellent formability on a complicated mold face, and adhesion to a mold face, causes no positional shift, and can be efficiently reinforced and stiffened at an intended position.

Abstract: A method is described for producing a fiber-reinforced plastic substrate that simultaneously satisfies three points of joinability, mechanical characteristics, and productivity, the method including the following components [A], [B], and [C], wherein at least the following drawing step, first impregnating step, second impregnating step, and take-up step are continuously and sequentially performed while the component [A] is caused to run: [A] a reinforcing fiber [B] a thermoplastic resin [C] a thermosetting resin <drawing step> step of drawing a continuous reinforcing fiber sheet containing the component [A]; <first impregnating step> step of impregnating either the component [B] or the component [C] from one surface of the continuous reinforcing fiber sheet to obtain a fiber-reinforced plastic intermediate in which either the component [B] or the component [C] is disposed on a first surface; <second impregnating step> step of impregnating the other of the component [B] or the component

Abstract: A fiber-reinforced plastic substrate is described in which a plurality of resins having different properties are firmly compounded and that includes components [A], [B], and [C]: [A] reinforcing fibers; [B] thermoplastic resin (b); and [C] thermoplastic resin (c), wherein the component [A] is arranged in one direction, in the fiber-reinforced plastic substrate, a resin area including the component [B] and a resin area including the component [C] are present, the resin area including the component [B] is present on a surface of one side of the fiber-reinforced plastic substrate, and a distance Ra(bc) between Hansen solubility parameters of the component [B] and the component [C] satisfies formula (1): Ra(bc)={4(?DB??DC)2+(?PB??PC)2+(?HB??HC)2}1/2?8 wherein Ra(bc), ?DB, ?DC, ?PB, ?PC, ?HB and ?HC are as defined.

Abstract: Provided is a structure having excellent flexibility represented by elastic restoring from compression or tensile elongation at break, and excellent lightness. A structure according to the present invention includes reinforced fibers, first plastic, and second plastic that exhibits rubber elasticity at room temperature, the reinforced fibers being discontinuous fibers, and the first plastic and/or the second plastic coating a crossing point between the reinforced fibers in contact with each other.

Abstract: A laminate includes a core obtained by impregnating a mat of fibers with a thermoplastic resin (B); and a skin obtained by impregnating continuous fiber(s) with a thermoplastic resin (A), wherein sheet-form intermediate substrates in the laminate have a thermal expansibility, the usable temperature region of said thermoplastic resin (A) and that of said thermoplastic resin (B) overlap over a temperature range of at least 5° C., said thermoplastic resin (A) has a temperature region that does not melt at a lower limit of said usable temperature region, said fibers contained in said mat penetrate through interface layers formed by said thermoplastic resin (A) and said thermoplastic resin (B), and said thermoplastic resin (A) and said thermoplastic resin (B) form interface layers each with a concave-convex shape having a maximum height Ry of not less than 50 ?m and an average roughness Rz of not less than 30 ?m.

Abstract: A method for manufacturing a composite structure in which a first member and a structure material as a second member are integrated, the method including: an arrangement step of arranging a structure precursor including a resin and reinforced fibers in a mold made of the first member; a heating step of heating the structure precursor to equal to or higher than a temperature at which a storage elastic modulus (G?) of the structure precursor is less than 1.2×108 Pa; a shaping step of expanding the structure precursor by heating to form a structure material as a second member, and bringing the structure material into close contact with the first member to obtain a composite structure; and a cooling step of cooling the composite structure.

Abstract: A sandwich laminate, includes as a layer forming a core, a sheet-form intermediate substrate obtained by impregnating a mat composed of reinforcement fibers with a thermoplastic resin; and, as layers forming a skin, sheet-form intermediate substrates obtained by impregnating a mat composed of reinforcement fibers or continuous reinforcement fibers with a thermoplastic resin, wherein at least the sheet-form intermediate substrate used as the layer forming a core has a thermal expansibility, the usable temperature region of a thermoplastic resin (A) constituting the layers forming a skin and that of a thermoplastic resin (B) constituting the layer forming a core overlap each other over a temperature range of at least 5° C., and the thermoplastic resin (A) has a temperature region where it does not melt at a lower limit of the usable temperature region of the thermoplastic resin (B).

Abstract: Provided is a molded article that has both a low specific gravity and high rigidity and further has suppressed wrinkles and scrapes, and a manufacturing method for the same.

Abstract: A composite structure includes a structure that contains first reinforced fibers and first resin and a laminate that is disposed on at least one surface of the structure and has a plurality of layers containing second reinforced fibers and second resin, with the structure and the laminate integrated, the first reinforced fibers being discontinuous fibers and having a thickness-wise average fiber orientation angle in a range of 5 to 60°, the second reinforced fibers being discontinuous fibers and having a thickness-wise average fiber orientation angle in a range of 0 to 5°, the structure having a density in a range of 0.01 to 1 g/cm3, the laminate having a variation in volume content of the second reinforced fibers in a range of 0 to 10%, and the composite structure having a protruding portion on a laminate's surface opposite from a laminate's surface in contact with the structure.

Abstract: Provided is a mountain-shaped structure material being excellent in stiffness and lightness. The present invention is a structure material including a resin, reinforced fibers and voids. The structure material has a specific bending stiffness represented as Ec1/3·??1 being 2.5 or more where a bending modulus is Ec and a density is ?. The structure material has a mountain shape.

Abstract: A molded product having both small specific gravity and high stiffness and also suffering few sink marks is described along with a method for the production thereof, where the molded product includes a porous body (A) integrated with an injection molded body (B), the porous body (A) having an apparent density of 0.05 to 0.8 g/cm3, the average thickness (tA) of the porous body (A) and the average thickness (tB) of the injection molded body (B) satisfying the relation tA?3×tB, and the injection molded body (B) covering at least one face of the porous body (A).

Abstract: An electronic device housing includes: a bottom cover; a top cover; a partition structure that is disposed in a space divided by the bottom cover and the top cover and has an opening; and a heat generation member. The partition structure is joined to the bottom cover or the top cover to form a hollow structure, and the heat generation member is disposed on a surface of the partition structure on the hollow structure side.

Abstract: A method is described for manufacturing a molded product having a recessed/protruding part from a molded substrate (A) including reinforcing fibers and a matrix resin by press molding, the method comprising: a step (I) of placing the molded substrate (A) between molds including an upper mold and a lower mold and deforming the molded substrate (A) in an in-plane direction by heating and pressing the molds; and a step (II) of deforming the molded substrate (A) in an out-of-plane direction by depressurizing the molds subsequent to the step (I), wherein a deformation rate ratio T represented by the following formula (1) is within a range of 0.1 to 1: T=X/Z ??(1) where X and Z are as defined.

Abstract: A method for manufacturing a structure material is a method for manufacturing a structure material that includes a thermoplastic resin, reinforced fibers, and voids. The method includes: a first process for arranging a structure precursor comprising the thermoplastic resin and the reinforced fibers in a mold with a surface temperature of 80° C. or less; a second process for raising the surface temperature of the mold up to a temperature at which a storage elastic modulus (G?) of the structure precursor is less than 1.2×108 Pa; a third process for lowering the surface temperature of the mold down to a temperature at which the storage elastic modulus (G?) of the structure precursor is 1.2×108 Pa or more; and a fourth process for removing a structure material obtained after end of the third process from the mold.

Abstract: A composite structure includes a structure that contains first reinforced fibers and first resin and a laminate that is disposed on at least one surface of the structure and has a plurality of layers containing second reinforced fibers and second resin, with the structure and the laminate integrated, the first reinforced fibers being discontinuous fibers and having a thickness-wise average fiber orientation angle in a range of 5 to 60°, the second reinforced fibers being discontinuous fibers and having a thickness-wise average fiber orientation angle in a range of 0 to 5°, the structure having a density in a range of 0.01 to 1 g/cm3, the laminate having a variation in volume content of the second reinforced fibers in a range of 0 to 10%, and the composite structure having a protruding portion on a laminate's surface opposite from a laminate's surface in contact with the structure.

Abstract: A structure material includes a resin, reinforced fibers, and voids, a volume content of the resin being within a range of 2.5% by volume or more and 85% by volume or less, a volume content of the reinforced fibers being within a range of 0.5% by volume or more and 55% by volume or less, the voids being contained in the structure material in a rate within a range of 10% by volume or more and 97% by volume or less, a thickness St of the structure material satisfying a conditional expression: St?Lf2·(1?cos(?f)) where a length of the reinforced fibers is Lf and an oriented angle of the reinforced fibers in a sectional direction of the structure material is ?f, and a compression strength in an in-plane direction at 50% compression of the structure material measured in accordance with JIS K7220 being 3 MPa or more.