US 10,239,351 B2 · Pneumatic tire

Abstract

[Object] A pneumatic tire 2 which is excellent in durability is provided. [Solution] The tire 2 includes adhesive sheet layers 28. Each adhesive sheet layer 28 includes an interposed portion 58 and a protruding portion 60. The interposed portion 58 is interposed between a base layer 32 and a cap layer 34 of a tread 4. The protruding portion 60 is layered over a carcass 12. The adhesive sheet layers 28 are obtained by a rubber composition being crosslinked. The rubber composition contains a tackifier. A width W1 of the interposed portion 58 is preferably greater than or equal to 5 mm, and preferably not greater than 20 mm. A width W2 of the protruding portion 60 is preferably greater than or equal to 10 mm, and preferably not greater than 20 mm. A thickness of each adhesive sheet layer 28 is preferably greater than or equal to 0.5 mm, and preferably not greater than 2.0 mm. A ratio of an adhesive strength of each adhesive sheet layer 28 to an adhesive strength of the cap layer 34 is preferably greater than or equal to 1.30.

Claims13

Dependent claims

A pneumatic tire comprising:

a tread including a base layer, and a cap layer that is disposed outward of the base layer in a radial direction and is layered over the base layer;
a pair of sidewalls that extend inward from ends, respectively, of the tread in the radial direction;
a pair of beads that are disposed inward of the sidewalls, respectively, in the radial direction;
a carcass that is extended, along the tread and the sidewalls, on and between both the beads;
a pair of adhesive sheet layers disposed such that a portion of each adhesive sheet layer is interposed between the base layer and the cap layer, and a remaining portion of each adhesive sheet layer is layered over the carcass in a region inward of each sidewall in an axial direction;
and
a belt disposed outward of the carcass in the radial direction,
wherein, in an axial direction, an inner end of each adhesive sheet layer is disposed outwardly of the corresponding end of the belt,
wherein a thickness of each adhesive sheet layer is greater than or equal to 0.5 mm, and not greater than 2.0 mm, and
wherein each adhesive sheet layer has a constant thickness.

7 more elements

A pneumatic tire comprising:

a tread including a base layer, and a cap layer that is disposed outward of the base layer in a radial direction and is layered over the base layer;
a pair of sidewalls that extend radially inward from opposite ends of the tread;
a pair of beads that are disposed radially inward of the sidewalls;
a carcass extending along the tread and the sidewalls, on and between both the beads;
a belt between the carcass and cap layer of the tread, the belt having a first edge and a second edge spaced from the first edge in an axial direction;
and
a pair of adhesive sheet layers, each adhesive sheet layer having a first portion disposed between the base layer and the cap layer, and a second portion over the carcass in each sidewall,
wherein each adhesive sheet layer is spaced from the belt in a direction extending from an equator of the tire to one of the beads so that the adhesive sheet layers do not overlap the belt,
wherein an interposed portion of each adhesive sheet layer is between the base layer and the cap layer, and a remaining portion of each adhesive sheet layer is layered over the carcass in a region inward of each sidewall in an axial direction, and
wherein a width of the remaining portion is equal to or greater than a width of the interposed portion.

7 more elements

Dependencies are inferred from the claim text.

Pneumatic tire

Life of this patent

Pneumatic tire

Life of this patent

Abstract

Claims13