Abstract: [Problem to be solved] An object of the present invention is to provide a method for evaluating the dissolution properties of a resist polymer, which method allows for an easy evaluation without requiring complicated processes, and with a high sensitivity. [Solution] The method for evaluating the dissolution properties of a resist polymer according to the present invention includes the following steps (i) to (iii): the step (i) of dissolving the resist polymer in a solvent to prepare a test solution; the step (ii) of adding a solvent dropwise to the test solution while stirring the test solution, and measuring in real time the weight of the solvent added dropwise and the change in the turbidity of the test solution, as the dropwise addition proceeds; and the step (iii) of calculating the amount of the solvent added dropwise until the turbidity of the test solution reaches a predetermined value.

Abstract: In a filler for tires containing silica particles and an aggregation inhibitor inhibiting the aggregation of the silica particles, the aggregation inhibitor contains at least one kind selected from the group consisting of phosphate and derivative thereof, amino alcohol, cationic surfactant, water-soluble aminosilane, nitrogen-containing heterocyclic compound, nonionic surfactant, tertiary amine compound, polyvinyl alcohol, non-zinc soap, saturated fatty acid ester, and glycerine fatty acid ester.

Abstract: In a filler for tires containing silica particles and an aggregation inhibitor inhibiting the aggregation of the silica particles, the aggregation inhibitor contains at least one kind selected from the group consisting of phosphate and derivative thereof, amino alcohol, cationic surfactant, water-soluble aminosilane, nitrogen-containing heterocyclic compound, nonionic surfactant, tertiary amine compound, polyvinyl alcohol, non-zinc soap, saturated fatty acid ester, and glycerine fatty acid ester.

Abstract: A vehicle door impact beam disposed between first and second door panels includes: a first grooved portion configured to include a bottom wall portion extending along the first door panel in a predetermined direction, and side wall portions; a second grooved portion disposed a predetermined gap away from the first grooved portion in the width direction, and configured to include a bottom wall portion and side wall portions respectively connected to both end portions of the bottom wall portion in the width direction; and a connection wall portion configured to connect one side wall portion, which is one of the side wall portions of the first grooved portion and positioned on a second grooved portion side, to one side wall portion which is one of the side wall portions of the second grooved portion and positioned on a first grooved portion side.

Abstract: A vehicle door impact beam includes a main body portion and terminal portions. The main body portion includes a first bottom wall portion, a pair of first side wall portions, and a pair of first flange portions formed at ends of the first side wall portions, respectively. The first side wall portions include first wall portions respectively extending from widthwise ends of the first bottom wall portion toward one direction, and second wall portions respectively extending from ends of the first wall portions toward the one direction. The second wall portions approach each other as extending from ends on the first wall portions side toward end potions on the one direction side. The first flange portions are formed outside a space surrounded by the first bottom wall portion and the pair of first side wall portions.

Abstract: A vehicle door impact beam disposed between first and second door panels includes: a first grooved portion configured to include a bottom wall portion extending along the first door panel in a predetermined direction, and side wall portions; a second grooved portion disposed a predetermined gap away from the first grooved portion in the width direction, and configured to include a bottom wall portion and side wall portions respectively connected to both end portions of the bottom wall portion in the width direction; and a connection wall portion configured to connect one side wall portion, which is one of the side wall portions of the first grooved portion and positioned on a second grooved portion side, to one side wall portion which is one of the side wall portions of the second grooved portion and positioned on a first grooved portion side.