Pneumatic tire and method for manufacturing same

Abstract

Provided are a pneumatic tire and a method for manufacturing the same that enable the prevention of vulcanization failure, which is a cause for concern when adopting a partial tie rubber layer, and sufficient achievement of reduced tire weight and rolling resistance through the adoption of the partial tie rubber layer. A partial tie rubber layer (40) is exclusively disposed throughout the entire region between a carcass layer (4) and an inner liner layer (9) excepting each leading end part of one pair of bead sections (3), wherein both widthwise end faces of the partial tie rubber layer (40) individually constitute an inclined face at an acute angle with respect to the carcass layer (4) side face of the partial tie rubber layer (40), the slope theta formed by the inclined face with respectto the face toward the carcass layer (4) side face of the partial tie rubber layer 40 being 20-60 degrees.

Description

technical field [0001] The present invention relates to a pneumatic tire having a partially bonded rubber layer that is limitedly arranged between a carcass layer and an inner liner, and a method for manufacturing the same. Pneumatic tire and its manufacturing method that can fully utilize the reduction of tire weight and rolling resistance brought about by partially bonding rubber layers without vulcanization failure that is a concern in the case. Background technique [0002] In pneumatic tires, in general, when an unvulcanized tire is inflated during tire manufacture, a joint rubber layer is disposed between the carcass layer and the inner liner in order to prevent the carcass cords from biting into the inner liner. With regard to such joint rubber layers, in recent years, in order to reduce tire weight and rolling resistance, it has been proposed to adopt not the entire area between the carcass layer and the inner liner, but the shoulder areas on the left and right. A p...

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Problems solved by technology

However, with regard to such partial joint rubber layers, each partial joint rubber layer provided in each shoulder region has a pair of ends (an end on the tire equator side and an end on the outer side in the tire width direction), so there is a problem in the tire structure. There is a possibility of affecting the manufacturability of the tire due to the increase in the number of bases of peeling between parts and the number of ends that may become uncompressed parts during manufacturing

[0004] In addition, even if the amount of the joint rubber layer used is reduced simply by narrowing the width of the existing overall joint rubber layer in consideration of the number of the above-mentioned ends, there is still the above-mentioned peeling of the end of the joint rubber layer. The basic point, the worry about the uncrimped part

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