Abstract: A topping sheet forming method includes: feeding a textile original fabric, obtained by weaving longitudinally aligned tire cords into a cord fabric by use of weft yarns; cutting off the weft yarns at a predetermined widthwise position to divide the textile original fabric into a plurality of narrow textile original fabrics; and topping at least one surface of the narrow textile original fabric with unvulcanized rubber.

Abstract: An antivibration device is equipped with an inner sleeve having a diameter expansion portion, an outer sleeve, an antivibration base body, and an annular stopper. The stopper is equipped with a first portion where a first distance from the center of the attaching hole to an inner peripheral surface of the attaching hole is set to be smaller than a maximum value of an outer radius of the diameter expansion portion, and a second portion where a second distance from the center to the inner peripheral surface of the attaching hole is set to be larger than the first distance.

Abstract: A method of manufacturing a pneumatic tire including forming a green case by cylindrically winding a tire component member which includes at least one layer of a carcass ply. The green tire is shaped by expanding the green case into a toroidal shape with the supply of a fluid into the green case so that the green case adheres to a tread ring arranged radially outside the green case. The green tire is subjected to vulcanization molding within a mold die. During the shaping of the green tire, the fluid is supplied in accordance with a pressure profile which changes in a stepwise manner. The pressure profile is set such that a former stage pressure which allows the green case to expand to 35% to 40% of a full expansion amount is set lower than a final stage pressure in a final stage.

Abstract: A torque rod capable of suppressing an outside member from being deformed or broken at the time of a vulcanized molding. A torque rod includes: a first antivibration device including: a cylindrical outside member having an axial end face, an axial inside member disposed on an internal peripheral side of the outside member, and an antivibration base body including a rubber-like elastic body adhered, in a vulcanized manner, to an external peripheral face of the inside member and to an internal peripheral face of the outside member; and a connecting member connected to a second antivibration device connecting two members by a rubber-like elastic body, the connecting member being an article integrated with the outside member, wherein the outside member includes a level difference which is provided at the axial end face around an entire circumference and which has a radial outside axially concaved relative to a radial inside.

Abstract: A method of manufacturing a wet rubber masterbatch includes preparing latex containing magnesium in an amount which is not greater than 150 ppm; and making a liquid mixture that includes a rubber component and carbon black. The latex may include rubber particles for which the 90 vol % particle diameter is not greater than 2 ?m. The liquid mixture can be made by a step (a) in which the latex and a dispersion solvent are mixed; and a step (b) in which a latex solution obtained at step (a) and a slurry containing the carbon black are mixed. The method for manufacturing a wet rubber masterbatch may satisfy: 0.1<b/a<1.0, where a indicates amount (ppm) of magnesium present in latex; and b indicates amount (parts by mass) of carbon black in the liquid mixture for every 100 parts by mass of rubber component in the liquid mixture.

Abstract: A pneumatic tire has a belt layer between a carcass and a tread portion. The belt layer has first and second main working belts, and a reinforcement belt. A cord angle of the reinforcement belt is not smaller than 6 degrees and not larger than 9 degrees and width thereof is equal to or wider than 50% of a tire-section width and not wider than either narrower one of the first and second main working belts. In a state where the pneumatic tire is mounted on a predetermined rim and filled with a minute internal pressure with no load applied, an arc passing points on both maximum width positions and a point on a tire equatorial plane of the reinforcement belt, in meridian section, has a radius of curvature of not smaller than 2500 mm. A total thickness TCE and TSH satisfy a relationship of 1.05TSH?TCE?1.35TSH.

Abstract: [Problem] To provide a cushion pad that reduces the wobbling feeling. [Solution] Regarding the test piece sampled from a core portion, the measured deflection under a load of 100 N during compression is equal to or less than 30 mm. The measured static spring constant under a load of 300 N at a pulling rate of 20 mm/minute is equal to or less than 25 N/mm. In the case of a vibration input in a low frequency band in the lateral direction, the compressive stress in the vertical direction due to the weight of a seated person and the tensile stress due to the vibration input in the lateral direction act on the support portion. The direction (gradient) of the resultant force as a combination of the compressive stress and the tensile stress can be closer to the vertical direction. This allows reducing the wobbling feeling.

Abstract: Provided is a tire vulcanization mold including an upper side plate and a lower side plate configured to mold tire side portions, an upper bead ring and a lower bead ring respectively having a profile surface configured to mold a bead portion and a non-profile surface positioned on an inner diameter side of the profile surface, and a thermocouple pullout passage configured to make the non-profile surface and an inner space positioned on an inner diameter side of the lower bead ring communicate with each other and to pull out a vulcanization temperature measuring thermocouple, wherein a first passage extending from the non-profile surface to a lower side plate side is formed in the lower bead ring, and at least a portion of the thermocouple pullout passage is configured by the first passage.

Abstract: A tire vulcanization mold according to an embodiment includes a side molding surface, a stencil plate forming a convex mark at an outer surface of a side portion, and an attachment recess depressed in the side molding surface. The stencil plate includes a mark forming concave portion which is depressed from a surface by embossing and a curved portion formed by curving both end portions in a width direction in a direction opposite to the depressed direction of the concave portion. The stencil plate may be attached to the attachment recess by press-inserting. A tip of the curved portion may contact a wall surface of the attachment recess to be elastically deformed so that a curved state of the curved portion increases and the stencil plate may be fixed into the attachment recess by fitting.

Abstract: A rubber composition for a tire comprises 100 parts by mass of a rubber component comprising diene rubber, and from 0.5 to 20 parts by mass of pellets comprising paper powder and starch and having water content of 5 mass % or more. A tire is provided with a tread rubber part comprising a foamed rubber formed by the rubber composition. A method for manufacturing a tire comprises mixing from 0.5 to 20 parts by mass of pellets comprising paper powder and starch and having water content of 5 mass % or more with 100 parts by mass of a rubber component comprising diene rubber to prepare a rubber composition, producing an unvulcanized tire using the rubber composition obtained, and vulcanization molding the unvulcanized tire.

Abstract: A process for producing a wet rubber masterbatch yielded by using, as raw materials, at least a filler, a dispersing solvent, and a rubber latex solution, comprises a step (i) of mixing the filler, the dispersing solvent and the rubber latex solution with each other to produce a filler-containing rubber latex solution, a step (ii) of solidifying the filler-containing rubber latex solution to produce a filler-containing rubber solidified product, and a step (iii) of dehydrating the filler-containing rubber solidified product to produce the wet rubber masterbatch. At the time of representing the temperature of the filler-containing rubber solidified product before the dehydration in the step (iii) by T1 (° C.), and representing the temperature of the filler-containing rubber solidified product after the dehydration by T2 (° C.), the following expressions (1) and (2) are satisfied: T1?100??(1) 80?T2?T1?160??(2).

Abstract: A rubber composition obtained by dry-mixing a rubber wet masterbatch A containing a carbon black A having a nitrogen adsorption specific: surface area (N2SA) of NA (m2/g) with a rubber wet masterbatch B containing a carbon black B having a nitrogen adsorption specific surface area (N2SA) of NB (m2/g), wherein the content ratio of the rubber wet masterbatch A to the rubber wet masterbatch B is from 5/95 to 40/60, and when the content proportion of the carbon black A in the rubber wet masterbatch A is represented by LA, and that of the carbon black B in the rubber wet masterbatch B is represented by LB, the specific expressions are satisfied.

Abstract: The purpose of the present invention is to provide: a single fibre including a thermally responsive liquid-crystal elastomer which reversibly expands and contracts in response to heat; a filament yarn including said single fibre; and a fibre product using the single fibre or the filament yarn. This single fibre includes a thermally responsive liquid-crystal elastomer which reversibly expands and contracts using, as a boundary, a transition temperature (Ti) at which phase transition from a liquid-crystal phase to an isotropic phase or from the isotropic phase to the liquid-crystal phase occurs.

Abstract: In a tire, a tread rubber includes a first layer which is grounded on a road surface in an outer peripheral surface thereof, and a second layer which is joined to an inner peripheral surface of the first layer in an outer peripheral surface thereof, the first layer includes a joint portion where rubbers having different elastic modulus are joined, and the second layer is formed by a rubber having a greater elastic modulus than an elastic modulus of at least one of the rubbers constructing the first layer.

Abstract: An apparatus for manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion. A rubber material is ejected from an ejection port in a state where the rubber pool portion is closed by the closing surface, the support surface and the mouthpiece are moved relative to each other after the rubber pool portion is filled with the rubber material, and a lamination starting end of the rubber material is pressed to the closing surface thus molding the lamination starting end into an inclined surface and, thereafter, the closing surface is moved in a direction away from the support surface.

Abstract: Provided is an anti-vibration device manufacturing method of press-inserting an anti-vibration bush having a rubber elastic body famed on an outer periphery of a cylindrical body into an attachment hole formed in a press-insertion object, the anti-vibration device manufacturing method including: a press-inserting step of moving the anti-vibration bush in a first direction to be press-inserted into the attachment hole; a returning step of moving the anti-vibration bush press-inserted into the attachment hole in a second direction opposite to the first direction; and a strain relaxing step of relaxing a strain of the rubber elastic body by stopping the anti-vibration bush while regulating the movement of the anti-vibration bush between the press-inserting step and the returning step.

Abstract: Provided is a device for press-inserting an anti-vibration bush having a rubber elastic body formed on an outer periphery of a cylindrical body into an attachment hole formed in a press-insertion object, the device including: a press-insertion portion which moves the anti-vibration bush toward the press-insertion object from an initial position separated from the press-insertion object; a casing which is provided between the initial position and the press-insertion object; and a nozzle which sprays a lubricant in the casing, in which the anti-vibration bush passes through the casing to be press-inserted into the press-insertion object, and in which the nozzle sprays the lubricant to the anti-vibration bush passing through the casing so that the lubricant is coated onto the anti-vibration bush.