Abstract: The present invention provides an inkjet ink that contains a metal complex dye, a polyoxyethylene based compound with which a number average molecular weight Mn is not less than 200, a tackifier with which a hydroxyl value is 30 to 70 mgKOH/g, a first solvent of at least one type selected from a group consisting of ketones, ethers, and esters and with which an SP value is less than 11, and a second solvent being an alcohol including at least an alcohol with 1 to 3 carbon atoms and with which the SP value is not less than 11 and is solvent based and does not contain (excludes) water, is unlikely to cause cogation, is also excellent in intermittent printing performance, and yet enables a character of excellent fixing property and abrasion resistance to be printed on a surface of a printing object with a non-absorbing property.

Abstract: The present invention provides an inkjet ink that contains a metal complex dye, a polyoxyethylene based compound with which a number average molecular weight Mn is not less than 200, a tackifier with which a hydroxyl value is 30 to 70 mgKOH/g, a first solvent of at least one type selected from a group consisting of ketones, ethers, and esters and with which an SP value is less than 11, and a second solvent being an alcohol including at least an alcohol with 1 to 3 carbon atoms and with which the SP value is not less than 11 and is solvent based and does not contain (excludes) water, is unlikely to cause cogation, is also excellent in intermittent printing performance, and yet enables a character of excellent fixing property and abrasion resistance to be printed on a surface of a printing object with a non-absorbing property.

Abstract: A fiber-reinforced composite material has an excellent design surface. The prepreg laminate includes at least prepregs [a] having reinforcing fibers impregnated with a resin, and a base material [b] not impregnated with a resin, wherein at least two of the prepregs [a] are stacked in succession, and both sides of the base material [b] are sandwiched by the prepregs [a].

Abstract: An object is to provide a manufacturing method of a fiber-reinforced resin that significantly reduces a resin filling defect on the surface and surface irregularity caused by a temperature difference between a molding temperature (curing temperature) and ordinary temperature in the course of molding the fiber-reinforced resin, and a product manufactured by the manufacturing method. There is accordingly provided a manufacturing method of a coated fiber-reinforced resin molded article and a product manufactured by the manufacturing method. The manufacturing method comprises a first molding process that cures a matrix resin which a reinforcing fiber is impregnated with at a temperature T1(° C.) to obtain a fiber-reinforced resin molded article; and a second molding process that places the fiber-reinforced resin molded article in a cavity of a mold, sets the cavity to a temperature T2(° C.) that is lower than the temperature T1(° C.

Abstract: A fiber-reinforced composite material has an excellent design surface. The prepreg laminate includes at least prepregs [a] having reinforcing fibers impregnated with a resin, and a base material [b] not impregnated with a resin, wherein at least two of the prepregs [a] are stacked in succession, and both sides of the base material [b] are sandwiched by the prepregs [a].

Abstract: An inkjet ink includes a binder resin, a tackifier, a colorant, and an organic solvent. The binder resin is a phenol resin having a softening point in a range from 70 degrees Celsius or more to 125 degrees Celsius or less. The colorant is a dye. The tackifier is a terpene phenol resin whose hydroxyl value is 10 to 45 mgKOH/g.

Abstract: [Problem] An inkjet ink is provided that is characterized by being excellent in intermittent printability particularly in being used in an on-demand type inkjet printer, that is characterized in that printings are not easily blurred when printing is restarted, and that is characterized in that printings that have been printed on a metal surface or a low-polarity surface or the like are not easily blurred or do not easily come off even if the printings are repeatedly rubbed with a fingertip or the like. [Solution] A phenol resin whose softening point is 70 to 125° C., a tackifier, a colorant, and an organic solvent were compounded together. It is preferable to use an alcohol having one to three carbon atoms as the organic solvent. Additionally, it is preferable to use a terpene phenol resin whose hydroxyl value is 10 to 45 mgKOH/g as the tackifier in dye-based compounding, and it is preferable to use a rosin ester resin whose acid value is 2 to 10 mgKOH/g as the tackifier in pigment-based compounding.

Abstract: An object is to provide a manufacturing method of a fiber-reinforced resin that significantly reduces a resin filling defect on the surface and surface irregularity caused by a temperature difference between a molding temperature (curing temperature) and ordinary temperature in the course of molding the fiber-reinforced resin, and a product manufactured by the manufacturing method. There is accordingly provided a manufacturing method of a coated fiber-reinforced resin molded article and a product manufactured by the manufacturing method. The manufacturing method comprises a first molding process that cures a matrix resin which a reinforcing fiber is impregnated with at a temperature T1(° C.) to obtain a fiber-reinforced resin molded article; and a second molding process that places the fiber-reinforced resin molded article in a cavity of a mold, sets the cavity to a temperature T2(° C.) that is lower than the temperature T1(° C.

Abstract: A process for producing a fiber reinforced resin which comprises placing at least a reinforcing fiber substrate in a cavity of a mold, injecting a resin into the cavity, and curing the resin, characterized in that a substrate for forming a skin layer, and a resin distribution medium, which is located between the substrate for forming the skin layer and the reinforcing fiber substrate and in which the ratio of the coefficient of impregnation thereof to that of the substrate for forming the skin layer is 1.5-10, are disposed on at least one surface of the reinforcing fiber substrate via an interlayer having a cover factor of 90%-100% and comprising at least one woven fabric. The process diminishes pinhole generation in the skin layer in RTM, and can reduce the necessity of a repair step in, e.g., a painting step as a later step, thereby improving productivity.

Abstract: Provided is a RTM method wherein a molding die composed of a temperature control mechanism, which is arranged on at least one of a plurality of dies that form a molding die and adjusts the temperature of the die, and a valve mechanism, which starts and stops supply of a resin in a state of having fluidity to the cavity of the molding die, is used. In the method, a plurality of the valve mechanisms are arranged on the molding die, each of the valve mechanisms is provided with one or a plurality of temperature control systems which adjust the temperature of the valve mechanism, the resin in the state of having fluidity is supplied to the cavity from the valve mechanisms, and a reinforcing fiber base material contained in the cavity is impregnated with the resin.

Abstract: A process for producing a molded fiber-reinforced resin by an RTM method includes disposing a molding precursor in a molding cavity of a mold; closing the mold in which the molding precursor is disposed; injecting a heated and pressurized resin into the molding cavity of the mold closed; solidifying the resin injected into the molding cavity; opening the mold after the resin has been solidified; and taking out the molded fiber-reinforced resin from the mold opened.

Abstract: A process for producing a molded fiber-reinforced resin by an RTM method includes disposing a molding precursor in a molding cavity of a mold; closing the mold in which the molding precursor is disposed; injecting a heated and pressurized resin into the molding cavity of the mold closed; solidifying the resin injected into the molding cavity; opening the mold after the resin has been solidified; and taking out the molded fiber-reinforced resin from the mold opened.

Abstract: A layered carbon-fiber product obtained by layering one or more sheets of carbon-fiber fabrics each prepared using one or more carbon-fiber bundles each including a plurality of carbon fibers arranged in a single direction, wherein at least a part of a surfaces and/or an edge face of the layered carbon-fiber product includes a graphitized part and the graphitized part exhibits a Raman spectrum in which an intensity ratio of a D band to a G band (D-band intensity/G-band intensity) is 0.3 or less.

Abstract: A molding precursor which includes a main body part and a burr formation part protruding outward from the edge of the main body part and extending continuously along the edge, wherein the main body part includes a first base having many reinforcing fibers and a second base having many fibers and has been superposed on the first base in an outer peripheral part of the main body part, the burr formation part is constituted of that part of the second base which protrudes outward from the edge of the main body part, and spaces among the many fibers constitute passages for a molding resin.

Abstract: A process for producing a reinforcing woven fabric includes sticking a resin material on at least one surface of a fabric substrate including a plurality of reinforcing fiber bundles and varying the relative position of a plurality of reinforcing fiber bundles to peel the resin material stuck over two or more reinforcing fiber bundles from a part of the two or more reinforcing fiber bundles.

Abstract: Provided is a RTM method wherein a molding die composed of a temperature control mechanism, which is arranged on at least one of a plurality of dies that form a molding die and adjusts the temperature of the die, and a valve mechanism, which starts and stops supply of a resin in a state of having fluidity to the cavity of the molding die, is used. In the method, a plurality of the valve mechanisms are arranged on the molding die, each of the valve mechanisms is provided with one or a plurality of temperature control systems which adjust the temperature of the valve mechanism, the resin in the state of having fluidity is supplied to the cavity from the valve mechanisms, and a reinforcing fiber base material contained in the cavity is impregnated with the resin.

Abstract: A pressure vessel includes a vessel body and a fiber reinforced plastic layer formed on the surface of the vessel body, wherein the fiber reinforced plastic layer include fiber reinforced plastic in which reinforcing fibers are impregnated with plastic, a strand elastic modulus of the reinforcing fiber is 305 GPa or higher, and a tensile elongation of the reinforcing fiber is 1.45 to 1.70%. A carbon fiber for a pressure vessel has a strand elastic modulus of 305 GPa or higher and a tensile elongation of 1.45 to 1.70%.

Abstract: A process for producing a reinforcing woven fabric includes sticking a resin material on at least one surface of a fabric substrate including a plurality of reinforcing fiber bundles and varying the relative position of a plurality of reinforcing fiber bundles to peel the resin material stuck over two or more reinforcing fiber bundles from a part of the two or more reinforcing fiber bundles.

Abstract: To provide a reinforcing woven fabric, which is excellent in deformability, capable of following a complicated shape and excellent in retention of the shape, and a preform using it, a fiber reinforced plastic molded component and a process for producing them. Provided is a reinforcing woven fabric where a resin material is stuck on at least one surface of a fabric substrate containing a plurality of reinforcing fiber bundles, then the resin material stuck over two or more reinforcing fiber bundles is peeled from a part of the two or more reinforcing fiber bundles by varying the relative position of a plurality of reinforcing fiber bundles constituting the fabric substrate, wherein the maximum value of load till a tensile strain in a non fiber axial tensile test reaches 1% is in a range of 0.01 to 0.75 N.

Abstract: A process for producing a fiber reinforced resin which comprises placing at least a reinforcing fiber substrate in a cavity of a mold, injecting a resin into the cavity, and curing the resin, characterized in that a substrate for forming a skin layer, and a resin distribution medium, which is located between the substrate for forming the skin layer and the reinforcing fiber substrate and in which the ratio of the coefficient of impregnation thereof to that of the substrate for forming the skin layer is 1.5-10, are disposed on at least one surface of the reinforcing fiber substrate via an interlayer having a cover factor of 90%-100% and comprising at least one woven fabric. The process diminishes pinhole generation in the skin layer in RTM, and can reduce the necessity of a repair step in, e.g., a painting step as a later step, thereby improving productivity.