Abstract: This invention provides a pneumatic tire (T) including: a tacky sealant layer (5) formed of a rubber component decomposable by a peroxide, and disposed on the inner side of an inner liner (4) in a region corresponding to a tread part (1); and a cover rubber layer (6) covering the inner side of the tacky sealant layer (5). A sheet piece (7) is disposed to traverse an adhesive seal part (Q) and/or (P) at an edge portion of the cover rubber layer (6), while at least one surface of the sheet piece (7) is a release face which can be separated from at least one of the tacky sealant layer (5) and the cover rubber layer (6). A first end of the sheet piece (7) is inserted between the tacky sealant layer (5) and the cover rubber layer (6) while a second end thereof protrudes to the outer side of the adhesive seal part (Q) and/or (P).

Abstract: Provided are a pneumatic tire T and a method of manufacturing the same. The pneumatic tire T includes: a tacky sealant layer 5 which is formed of a rubber component thermally decomposable with a peroxide, and which is disposed on the inner wall surface of the tire at least in a region corresponding to a tread portion 1; a cover rubber layer 6 which covers the tacky sealant layer 5. In the pneumatic tire T, the cover rubber layer 6 is provided with at least one gas vent hole 7a (7b) formed therein. This allows decomposition gas generated from the tacky sealant layer 5 to be discharged through the gas vent hole 7a (7b) to the outside of the tire.

Abstract: Disclosed are a pneumatic tire, which exhibits excellent puncture-preventing function while avoiding inconvenience aroused when a sealant layer is formed based on decomposition reaction of polyisobutylene, a process for producing the same and a sealant rubber composition. This pneumatic tire is provided with the sealant layer in a region of the inner surface of the tire which corresponds at least to a tread. The sealant layer is made of an adhesive sealant obtained by heating a rubber composition containing 0.2 to 20 parts by weight of peroxide per 100 parts by weight of a rubber ingredient containing not less than 50 wt. % of polyisobutylene. 5 to 50 parts by weight of a liquid ethylene/?-olefin copolymer, liquid polybutadiene or liquid polyisoprene are added as an adhesive of the sealant layer.

Abstract: The present invention provides a run-flat support body and a tire/wheel assembly whose weights can be respectively reduced. The run-flat support body includes an annular shell and elastic rings, the annular shell having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs, the elastic rings being attached respectively to the legs portions of the annular shell, and the elastic rings being designed to be mounted on a rim of a wheel. The annular shell is formed of a porous structural material having fine voids. The run-flat support body is attached to an inside of a pneumatic tire mounted on the rim of the wheel.

Abstract: A sealant rubber composition which forms a spongy tacky sealant layer having moderate viscosity properties; and a pneumatic tire having in the tire main body a tacky sealant layer obtained by heating the rubber composition. The rubber composition comprises 0.2 to 20 parts by weight of a peroxide per 100 parts by weight of polymers comprising 95 to 50 parts by weight of a polymer decomposable with the peroxide and 5 to 50 parts by weight of a polymer crosslinkable with the peroxide.

Abstract: A pneumatic tire having a tread, a sealant layer for prevention of puncturing being provided on the inner surface of the tire in the tread, a rubber cover layer covering the surface of the sealant layer. The rubber cover layer is formed of rubber having a JIS A hardness X of 50 to 70, and has a thickness Y (mm) satisfying the following expression in relation to the hardness X. ?0.025X+2.25?Y??0.025X+3.

Abstract: A pneumatic tire of which self-seal function can be improved while the increase in weight of the tire is minimized. The pneumatic tire having an adhesive sealant layer in the region corresponding to at least a tread portion on the inner side of the tire, the adhesive sealant layer being constituted from a rubber composition containing a rubber component to be decomposed by peroxide and 0.2 to 20 parts by weight of peroxide per 100 parts by weight of the rubber component, in which fibrillated short fibers with an average length of 100 to 5000 ?m are mixed and scattered.

Abstract: A tire/wheel assembly, wherein a run-flat support body (3), comprising an annular shell (4) having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs and elastic rings (5) supporting the ends of the legs on a rim, is inserted into a hollow part of a pneumatic tire (2), and wherein the height (A) of the run-flat support body (3) in the cross section thereof is 50 to 60% of the height (SH) of the pneumatic tire (2) in the cross section thereof, and wherein the cross sectional area of the bead cores (7) of the pneumatic tire (2) is 25 to 40 mm2.

Abstract: A tire/wheel assembly, wherein a run-flat support body (3) comprising an annular shell (4) having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs and elastic rings (5) supporting the ends of the fork-shaped open legs on a rim is inserted into the hollow part of a pneumatic tire (2), and the height (A) of the run-flat support body (3) in the cross section thereof is 40 to 47% of the height (SH) of the pneumatic tire (2) in the cross section thereof.

Abstract: The present invention provides a tire/wheel assembly and a run-flat support member. A pneumatic tire is fitted to a wheel rim; and the run-flat support member constituted of a circular shell and elastic rings is inserted into a cavity of the pneumatic tire, in which the circular shell has a support surface thereof extended toward the periphery of the tire and leg portions along each side of the support surface, and the elastic rings support the leg portions of the circular shell on the rim. In the tire/wheel assembly, the leg portion of the circular shell is formed to have a sidewall extending in a shell radial direction and a bottom wall that is substantially parallel to a shell axial direction. The elastic ring is attached to the sidewall of the leg portion while being abutted on the bottom wall of the same without an engagement.

Abstract: Disclosed are a pneumatic tire, which exhibits excellent puncture-preventing function while avoiding inconvenience aroused when a sealant layer is formed based on decomposition reaction of polyisobutylene, a process for producing the same and a sealant rubber composition. This pneumatic tire is provided with the sealant layer in a region of the inner surface of the tire which corresponds at least to a tread. The sealant layer is made of an adhesive sealant obtained by heating a rubber composition containing 0.2 to 20 parts by weight of peroxide per 100 parts by weight of a rubber ingredient containing not less than 50 wt. % of polyisobutylene. 5 to 50 parts by weight of a liquid ethylene/&agr;-olefin copolymer, liquid polybutadiene or liquid polyisoprene are added as an adhesive of the sealant layer.

Abstract: A sealant rubber composition which forms a spongy tacky sealant layer having moderate viscosity properties; and a pneumatic tire having in the tire main body a tacky sealant layer obtained by heating the rubber composition. The rubber composition comprises 0.2 to 20 parts by weight of a peroxide per 100 parts by weight of polymers comprising 95 to 50 parts by weight of a polymer decomposable with the peroxide and 5 to 50 parts by weight of a polymer crosslinkable with the peroxide.

Abstract: This invention relates to a tubeless tire capable of obtaining a sufficient sealing property even if application amount of a sealant agent is lessened. Tubeless tire 1 of this invention includes sealant layer 4 formed of the sealant agent so as to adhere firmly to the inside of inner liner layer 3 that keeps the inside of the tire airtightly. And cover layer 5 formed of the elastic body with high permeability adheres firmly to the inside of the sealant layer 4.

Abstract: The present invention provides a tire/wheel assembly and a run-flat support member which can achieve both workability of tire-to-rim fit and durability for run-flat traveling. The tire/wheel assembly is formed as follows: a pneumatic tire is fitted to a wheel rim; and the run-flat support member constituted of a circular shell and elastic rings is inserted into a cavity of the pneumatic tire, in which the circular shell has a support surface thereof extended toward the periphery of the tire and leg portions along each side of the support surface, and the elastic rings support the leg portions of the circular shell on the rim. In the tire/wheel assembly, the leg portion of the circular shell is formed to have a sidewall extending in a shell radial direction and a bottomwall that is substantially parallel to a shell axial direction. The elastic ring is attached to the sidewall of the leg portion while being abutted on the bottom wall of the same without an engagement.

Abstract: A damper plate for an automobile wheel by which ride comfort and interior noise characteristics are improved without seriously deteriorating driving stability or unfastening nuts. The damper plate has a structure in which a metal plate and a buffer member are laminated and is inserted between the automobile wheel and an axle.

Abstract: A damper plate for an automobile wheel by which ride comfort and interior noise characteristics are improved without seriously deteriorating driving stability or unfastening nuts. The damper plate has a structure in which a metal plate and a buffer member are combinedly laminated and is inserted between the automobile wheel and an axle.