Abstract: A fuel pump includes a plunger that reciprocates, a retainer having a mounting portion attached to a lower end portion of the plunger, and a spring that biases the plunger via the retainer. The mounting portion has an engagement portion that is engaged with a constricted portion formed at the lower end portion of the plunger. A diameter of a circle formed by a corner portion of the engagement portion and an inner peripheral wall of the spring is smaller than a diameter of the lower end portion of the plunger.

Abstract: Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism.

Abstract: Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper 84) that guides movement of a valve body (discharge valve 82), a main body portion (body 1) provided with a valve chamber (discharge valve chamber 1d) that houses the regulating member, a sealing member (plug 85) that seals the valve chamber, and a welded portion (welded portion 86) that fixes the sealing member to the main body portion. An annular space portion (annular space portion 60) along an outer periphery of the regulating member is formed between the welded portion and the regulating member.

Abstract: A composite active material for a lithium secondary battery includes a matrix having a plurality of voids and a Si-based material accommodated in the voids. The matrix includes amorphous carbon. The Si-based material is Si or a Si alloy.

Abstract: Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism. A discharge valve mechanism 500 includes a valve seat portion 51 having a primary-side flow path, a valve body 52 which can be seated on and separated from the valve seat portion 51, and a guide portion 542a which is formed to be slidable on an outer surface of the valve body 52 and guides movement of the valve body 52 in a contacting/separating direction with respect to the valve seat portion 51. The guide portion 542a includes a portion in which a gap from the outer surface of the valve body 52 is set to a predetermined value or less.

Abstract: Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper 84) that guides movement of a valve body (discharge valve 82), a main body portion (body 1) provided with a valve chamber (discharge valve chamber 1d) that houses the regulating member, a sealing member (plug 85) that seals the valve chamber, and a welded portion (welded portion 86) that fixes the sealing member to the main body portion. An annular space portion (annular space portion 60) along an outer periphery of the regulating member is formed between the welded portion and the regulating member.

Abstract: Provided are: a stabilizer composition that can not only impart excellent thermal stability, coloration resistance, thermal coloration resistance, and the like to a vinyl chloride resin, but also impart excellent transparency to a vinyl chloride resin when used in an application where transparency is required; a vinyl chloride resin composition containing the same; and a molded body thereof. The stabilizer composition contains 5 to 2,500 parts by mass of a component (B) with respect to 100 parts by mass of a component (A). The component (A) is at least one organic acid zinc salt, and the component (B) is at least one epoxy compound having a glycidyl ether group and/or a glycidyl ester group.

Abstract: Provided are: a thermal stabilizer composition which does not generate an odor of a phosphorus-based antioxidant; and a synthetic resin composition comprising the same. The thermal stabilizer composition comprises: 100 parts by mass of a phosphorus-based antioxidant having a phosphite structure; and 0.001 to 10 parts by mass of a phenolic antioxidant having a substructure represented by the following Formula (1): (wherein, R1, R2, R3 and R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; a represents an integer of 0 to 2; and, when a is 2, plural R3s are optionally the same or different).

Abstract: Provided is a fuel injection valve capable of stroking a valve body in large and small two stages and capable of precisely controlling an injection flow rate at the stroke. Therefore, the fuel injection valve of the present invention is provided with a valve body for opening or closing a flow path, a movable element for driving the valve body in a valve opening direction, and a magnetic core for attracting the movable element, in which the movable element is separately configured from the valve body, and is configured by a first movable element having a first facing surface facing the magnetic core and having the first facing surface attracted by the magnetic core, and a second movable element separately configured from the first movable element, having a second facing surface facing the magnetic core, and having the second facing surface attracted by the magnetic core.

Abstract: Disclosed is a vinyl chloride-based resin composition having excellent weather resistance, coloration resistance, and thermal stability as well as excellent transparency, and a molded article using this vinyl chloride-based resin composition. Specifically, the vinyl chloride-based resin composition contains a vinyl chloride-based resin in an amount of 100 parts by mass, an organic acid zinc salt as a component (A) in an amount of 0.01 to 10.0 parts by mass, a ?-diketone compound as a component (B) in an amount of 0.01 to 10.0 parts by mass, and one or more triazine-based compounds as a component (C) represented by Formula (1) in an amount of 0.01 to 20.0 parts by mass. (In Formula (1), R1 to R3 represent a linear or branched alkyl group having 1 to 12 carbon atoms or the like, and R4 to R6 represent an alkyl group having 1 to 8 carbon atoms or the like.

Abstract: Provided are: a thermal stabilizer composition which does not generate an odor of a phosphorus-based antioxidant; and a synthetic resin composition comprising the same. The thermal stabilizer composition comprises: 100 parts by mass of a phosphorus-based antioxidant having a phosphite structure; and 0.001 to 10 parts by mass of a phenolic antioxidant having a substructure represented by the following Formula (1): (wherein, R1, R2, R3 and R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; a represents an integer of 0 to 2; and, when a is 2, plural R3s are optionally the same or different).