Pneumatic tire

摘要

A pneumatic tire which uses, as an inner liner layer, a laminated sheet obtained by laminating an air permeation preventing layer, made of any one of a thermoplastic resin and a thermoplastic elastomer composition containing a blend of the thermoplastic resin and an elastomer, and a tie rubber layer, and which has high durability to prevent development of a crack in the tie rubber layer that occurs around a splice portion of the laminated sheet after the tire starts to be used. In the pneumatic tire, a sagged portion is formed by a concavo-convex structure in the air permeation preventing layer at least between points P and Q in a shape that a length La of a straight line connecting points P and Q and a length Lb of the air permeation preventing layer actually passing through points P and Q satisfy a relationship of (1.03×La)≦Lb≦(1.5×La).

主权项

1. A pneumatic tire comprising:
one of a thermoplastic resin and a thermoplastic elastomer composition containing a blend of the thermoplastic resin and an elastomer for an air permeation preventing layer, such that a concavo-convex structure, including at least one of a concave portion and a convex portion, is formed in the air permeation preventing layer at least between a point P and a point Q in such a shape that a length La of a straight line connecting the point P and the point Q and a length Lb of the air permeation preventing layer actually passing through the point P and the point Q satisfy a relationship of (1.03×La)≦Lb≦(1.5×La), where the point P is a point at which a perpendicular line extending from a cavity-side end A of a splice portion of the air permeation preventing layer to the air permeation preventing layer on a non-cavity side intersects the air permeation preventing layer on the non-cavity side, and the point Q is a point at a position on the air permeation preventing layer away from the cavity-side end A of the splice portion of the air permeation preventing layer by 25 mm in a first direction of a tire circumferential direction toward a position where the air permeation preventing layer on the non-cavity side is exposed.