Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Noriya Hayashi

Koichi Hasegawa

Hiroshi Mizuno

Shunichi Hayashi

Kazuo Ota

Hidetaka Hattori

Toshikatsu Nohara

Norio Miwa

Yusuke Kobayashi

Seiji Kobayashi

Tatsuya Kimura

Manabu Kaneko

Yuji Maruyama

Junko Watanabe

Masayuki Kanemasu

Mitsuyoshi Uematsu

Akihisa Watanabe

Takahito Shimomukai

Nobuo Ishihara

Yoshiyuki Tasaka

Hitoshi Noda

Yukihiro Sakaguchi

Naomoto Ishikawa

Toshikatsu Sakakibara

Atsushi Nohara

Provided is a method for making a mold of a gap between components, the method comprising: a step for preparing a curable composition by mixing a resin material with a curing agent that promotes curing of the resin material; a step for cooling the curable composition (M) to a predetermined temperature at which curing of the curable composition is not initiated, so as to manufacture a mold-making kit; a step for placing the mold-making kit in a gap between a first member and a second member so as to fill the gap; a step for curing the mold-making kit between the first member and the second member to mold the mold-making kit into the shape of the gap; and a step for removing the cured mold-making kit from the gap.

Mold-making method to gap, shim manufacturing method, manufacturing method of mold-making kit, and mold-making kit

A curable composition of the present invention includes a cationic polymerizable compound; a thermal polymerization initiator; and a storage stabilizer, in which the cationic polymerizable compound includes at least two selected from the group consisting of a glycidyl ether compound, an alicyclic epoxy compound, and an oxetane compound, a content of the thermal polymerization initiator is from 0.3 to 3 parts by mass with respect to 100 parts by mass of the cationic polymerizable compound, and chain curing is enabled by thermal energy generated by a polymerization reaction of the cationic polymerizable compound.

Curable composition, curable paste material, curable sheet material, curable modeling material, curing method, and cured product

A joint member is formed of a composite including reinforcement fibers and resin. The joint member is configured to be joined with another joint member to form a joint structure capable of enduring a tensile load in a load direction in which the joint member and the other joint member are separated from each other at a joined portion of the joint structure in a longitudinal direction of the joint member. The joint member includes a main body part and a joint part connected with the main body part at an end part of the main body part in the longitudinal direction of the joint member. The joint part has an orientation pattern having anisotropy such that fiber directions of the reinforcement fibers included in the joint part include a fiber direction different from the longitudinal direction of the joint member.

Joint member of composite and joint structure

In an artificial defect materialof an FRP structure, a heat-resistant high-linear-expansion materialarranged between the layers thermally expands in case of high-temperature shaping of the FRP structure, so that a predetermined shape is shaped between a plurality of layers of the fiber reinforcing base materialand the materialthermally shrinks at the room temperature after the shaping, so that a space is formed due to the shrinkage difference from the fiber reinforcing base materials. The materialhas a linear expansion coefficient larger than that of the FRP structure by a predetermined value or more, and has the shape keeping property and the heat resistance to endure the shaping temperature.

Artificial defect material and manufacturing method of FRP structure

A method of producing a composite material includes preparing at least one molded product raw material by primary curing; preparing an assembled body by assembling the primarily cured molded product raw material with another molded product raw material; and integrally forming the molded product raw materials by heating the assembled body to a temperature equivalent to or higher than a glass transition point of the primarily cured molded product raw material to cause a phase of the at least one molded product raw material to transition to a rubberized state, by allowing an adhesive adjacent to the molded product raw material or the other molded product raw material adjacent to the molded product raw material to coexist with the molded product raw material in the rubberized state, and by secondarily curing the primarily cured at least one molded product raw material.

Method of producing composite material

An RTM molding device and an RTM molding method which enable resin impregnation of even large members and thick members without causing non-impregnated regions or fiber wrinkle, and yield a molded body having superior toughness and excellent precision. In the RTM molding device, a surface molding layer, which is disposed between a fiber-reinforced base material and a molding die, has a plurality of through-holes formed therein, and has sufficient rigidity that the thickness does not substantially change under the pressure inside the cavity when the inside of the cavity is placed under reduced pressure, and a resin diffusion portion, which is located on the side of the surface molding layer opposite the fiber-reinforced base material, and comprises a resin flow path formed so as to connect with the plurality of through-holes of the surface molding layer, are provided on at least one surface of the fiber-reinforced base material.

RTM molding device, RTM molding method, and semi-molded body

Provided is an RTM moldable chain curing resin composition which can be molded with less energy in a short time, and which makes it possible to obtain a cured product that is superior in mechanical strength. A chain curing resin composition of the present invention includes an alicyclic epoxy compound (A) having two cyclohexene oxides in a molecule and a specific modified bisphenol A-type epoxy resin (B), and the content of the alicyclic epoxy compound (A) is 25 to 90% by mass, when the total of the component (A) and the component (B) is taken as 100% by mass.

Chain curing resin composition and fiber-reinforced composite material

A prepreg of FRP (fiber reinforced plastic) having with (i) a matrix resin composition containing a bifunctional isocyanate and/or a trifunctional isocyanate, a polyol and a bifunctional chain extender having two active hydrogen groups at a molar ratio, as a functional group, of isocyanate:polyol:chain extender=5.0 to 1.0:1.0:4.0 to 0, or containing a bifunctional isocyanate and/or a trifunctional isocyanate and a polyol at a molar ratio, as a functional group, of liquid isocyanate:polyol=0.9 to 1.1:1.0; and (ii) a fibrous material. A production process of the prepreg. According to the present invention, the prepreg has a sufficient pot life and permits convenient production of an FRP molding.

Prepreg for fiber reinforced plastic and production process thereof

A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.

Resin transfer molding device and resin transfer molding method

Provided are a shape memory polymer composition, which comprises a bifunctional isocyanate and/or a trifunctional isocyanate, and a polyol having an average molecular weight of from 100 to 550, with a molar ratio in terms of functional groups of isocyanate:polyol=0.9 to 1.1:1.0; FRP having the shape memory polymer and a fibrous material; and a production process of the FRP comprising impregnating the fibrous material with, as a matrix resin, the shape memory polymer composition and curing. According to the present invention, the shape memory polymer composition has an extended pot life and FRP has excellent inflatability.

Shape memory polymer composition, fiber reinforced plastic and production process thereof

There is provided a neutron shielding material which has heat resistance and has ensured neutron shielding performance even in a high-temperature environment during storage of a spent nuclear fuel for high burnup. A neutron shielding material having improved heat resistance and ensured neutron shielding performance due to the absence of an amine curing agent is provided by a neutron shielding material composition comprising a polymerization initiator, a polymerization component, a density increasing agent and a boron compound. As the polymerization component of the present invention, an epoxy component and an oxetane component are particularly preferably used.

Neutron shielding material composition, shielding material and container

A neutron shield material that exhibits high heat resistance and ensures neutron shielding capacity. A composition for neutron shield material excelling in heat resistance and ensuring neutron shielding capacity is provided by comprising a hydrogenated bisphenol type epoxy of the formula: (1) (wherein each of Rto Ris independently selected from the group consisting of CH, H, F, Cl and Br, and n=0 to 2), a hardening agent component having at least one cyclic structure and two or more amino groups, a density increasing agent and a boron compound.

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Tokyo, Japan

Noriya Hayashi