Abstract: Provided is a concrete reinforcing composite material that is impregnated with a thermoplastic resin having excellent alkali resistance and handleability. In a concrete reinforcing composite material 10, a core material 12 is formed from a fiber bundle of reinforcing fibers. The core material 12 is covered with a coating layer 14 made of a thermoplastic resin. The core material 12 is impregnated with the thermoplastic resin. The thickness of the coating layer 14 is 84 ?m or more. The fiber volume content Vf of the core material 12 is 60% or more.

Abstract: A continuous forming apparatus of a fiber reinforced composite includes a tension detection mechanism, a drive motor, and a drive control device. The drive control device is configured so that a material roll is rotationally driven in a delivery direction of a reinforced fiber base material during a time period from a time point of end of pressurization in a forming process to a time point of end of a pulling-out process, and is also configured to perform tension control on the reinforced fiber base material based on a detected tension value from the tension detection mechanism and a target tension value, during a time period from a time point of start of the pulling-out process to a time point of end of the pressurization in the forming process in a next forming operation.

Abstract: A method for manufacturing a fiber-reinforced resin tube body includes: a preparing step of preparing a cylindrical expandable body having fiber wound therearound; an installing step of installing the expandable body in a mold after the preparing step; a flowing step of flowing resin into the mold, in which the expandable body is placed, after the installing step; and an expanding step of expanding the expandable body toward an inner wall of the mold after the flowing step.

Abstract: An object of the present invention is to provide a fiber-reinforced thermoplastic resin sheet which can be manufactured into a molded body exhibiting excellent appearance quality as well as exhibits both high moldability and strength and a manufacturing method of such a fiber-reinforced thermoplastic resin sheet. The present invention relates to a fiber-reinforced thermoplastic resin sheet which is a random laminated body of a tape-shaped unidirectional prepreg and contains spread reinforcement fibers and a polymer (a) and in which the polymer (a) is a polymer of at least a bisphenol A type epoxy compound represented by Formula (1): where n is an integer of 1 to 4 and a bisphenol compound selected from the group consisting of bisphenol A, bisphenol F, bisphenol S, bisphenol B, bisphenol E, and bisphenol P.

Abstract: An FRP molded product formed by impregnating a fiber base material with a matrix resin using a flow medium, wherein the flow medium has a sheet shape and comprises fibers made of a phenoxy resin, the matrix resin is an epoxy resin, the fiber base material and the flow medium are stacked, at least part of the flow medium is hardened in a state where the part of the flow medium is integrated with the matrix resin by dissolution or adhesion, and the hardened flow medium becomes a design face.

Abstract: A continuous forming apparatus of a fiber reinforced composite includes a tension detection mechanism, a drive motor, and a drive control device. The drive control device is configured so that a material roll is rotationally driven in a delivery direction of a reinforced fiber base material during a time period from a time point of end of pressurization in a forming process to a time point of end of a pulling-out process, and is also configured to perform tension control on the reinforced fiber base material based on a detected tension value from the tension detection mechanism and a target tension value, during a time period from a time point of start of the pulling-out process to a time point of end of the pressurization in the forming process in a next forming operation.

Abstract: A roll-forming apparatus includes a heating portion, and a shaping portion disposed downstream of the heating portion in a conveyance direction of a fiber reinforced plastic member to shape the fiber reinforced plastic member heated by the heating portion. The shaping portion includes a first forming roller pair, and a second forming roller pair disposed downstream of the first forming roller pair in the conveyance direction. A rotational speed of the second forming roller pair is set higher than a rotational speed of the first forming roller pair to apply a tension in the conveyance direction to the fiber reinforced plastic member between the first forming roller pair and the second forming roller pair.

Abstract: An object of the present invention is to provide a fiber-reinforced thermoplastic resin sheet which can be manufactured into a molded body exhibiting excellent appearance quality as well as exhibits both high moldability and strength and a manufacturing method of such a fiber-reinforced thermoplastic resin sheet. The present invention relates to a fiber-reinforced thermoplastic resin sheet which is a random laminated body of a tape-shaped unidirectional prepreg and contains spread reinforcement fibers and a polymer (a) and in which the polymer (a) is a polymer of at least a bisphenol A type epoxy compound represented by Formula (1): [where n is an integer of 1 to 4] and a bisphenol compound selected from the group consisting of bisphenol A, bisphenol F, bisphenol S, bisphenol B, bisphenol E, and bisphenol P, and Mwa is 25,000 or more and a proportion (Mwb/Mwa) of Mwb to Mwa is 1.01 to 1.

Abstract: Disclosed are a laminate having a laminated structure of five or more layers wherein each layer is a resin impregnated fiber reinforced composition layer in which fibers are oriented unidirectionally, the resin in the resin impregnated fiber reinforced composition layer is an olefin-based polymer having the melting point or the glass-transition temperature of 50 to 300° C., and the shape of the laminate can be easily controlled by melt press molding; and a tape winding pipe excellent in balance between bending rigidity and compressive rigidity.

Abstract: A manufacturing method of a tank including a tubular body portion, and dome-shaped side end portions formed on both sides of the body portion, the manufacturing method includes forming a tubular compact serving as at least part of the body portion from one fiber reinforced resin sheet by winding the fiber reinforced resin sheet including reinforced fibers impregnated with thermoplastic resin is wound several times around a peripheral surface of a core from a direction perpendicular to an axial center of the core in a state where the thermoplastic resin is melted.

Abstract: An object is to provide a method for producing a polysaccharide derivative without using a catalyst, a cocatalyst, or an active compound by esterification, etherification, or the like, from a polysaccharide such as cellulose as a source material, while maintaining a high molecular weight. Another object is to provide a method for producing a cellulose derivative in a separated condition directly from biomass containing lignocellulose. A method for producing a polysaccharide derivative of the present invention is characterized in that a reaction is carried out in a mixture comprising: a source material comprising a polysaccharide; an ionic liquid for which the pKa of a conjugate acid of an anion in DMSO is 12 to 19 and which is capable of producing a carbene; and a chain or cyclic ester compound or an epoxy compound. Preferably as a source material containing a polysaccharide, a biomass source material containing lignocellulose is used.

Abstract: An object is to provide a method for producing a polysaccharide derivative without using a catalyst, a cocatalyst, or an active compound by esterification, etherification, or the like, from a polysaccharide such as cellulose as a source material, while maintaining a high molecular weight. Another object is to provide a method for producing a cellulose derivative in a separated condition directly from biomass containing lignocellulose. A method for producing a polysaccharide derivative of the present invention is characterized in that a reaction is carried out in a mixture comprising: a source material comprising a polysaccharide; an ionic liquid for which the pKa of a conjugate acid of an anion in DMSO is 12 to 19 and which is capable of producing a carbene; and a chain or cyclic ester compound or an epoxy compound. Preferably as a source material containing a polysaccharide, a biomass source material containing lignocellulose is used.

Abstract: A manufacturing method of a tank including a tubular body portion, and dome-shaped side end portions formed on both sides of the body portion, the manufacturing method includes forming a tubular compact serving as at least part of the body portion from one fiber reinforced resin sheet by winding the fiber reinforced resin sheet including reinforced fibers impregnated with thermoplastic resin is wound several times around a peripheral surface of a core from a direction perpendicular to an axial center of the core in a state where the thermoplastic resin is melted.

Abstract: A sailing ship includes a sailing unit, which comprises a hard sail assembly comprising a plurality of hard sail sections of wing-shaped hollow cross section vertically stacked so each, except the lowermost, fits on the one immediately below; a mast assembly comprising a plurality of mast sections of hollow cross section vertically stacked so each, except the lowermost, fits in the one immediately below; connecting members for connecting upper ends of the hard sail sections to upper ends of the mast sections located at the same level; first means for moving each mast section, except the lowermost, toward and away from the one immediately below; and second means for rotating the mast assembly around its longitudinal axis. Overlapping lengths between vertically adjacent mast sections are variably controlled so as to variably control overlapping lengths between vertically adjacent hard sail sections. Thus, the hard sail assembly vertically expands and contracts.

Abstract: A sailing ship includes a sailing unit, which comprises a hard sail assembly comprising a plurality of hard sail sections of wing-shaped hollow cross section vertically stacked so each, except the lowermost, fits on the one immediately below; a mast assembly comprising a plurality of mast sections of hollow cross section vertically stacked so each, except the lowermost, fits in the one immediately below; connecting members for connecting upper ends of the hard sail sections to upper ends of the mast sections located at the same level; first means for moving each mast section, except the lowermost, toward and away from the one immediately below; and second means for rotating the mast assembly around its longitudinal axis. Overlapping lengths between vertically adjacent mast sections are variably controlled so as to variably control overlapping lengths between vertically adjacent hard sail sections. Thus, the hard sail assembly vertically expands and contracts.