Pneumatic tire with buffer rubber layer
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTadashi Higuchi, Daisuke Kanenari
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Abstract
A pneumatic tire using an inner liner layer comprising a film of a thermoplastic resin, or a blend of a thermoplastic resin and an elastomer, having an air permeation coefficient of not more than 25×10−12 cc·cm/cm2·sec·cmHg and a Young's modulus of 1 to 1000 MPa, wherein a buffer rubber layer containing short fibers is arranged between the inner liner layer and a carcass layer in bead directions from two ends of a widest width belt layer in ranges of at least 20 mm, whereby a problem of trouble during production is solved and the durability of the inner liner layer is improved, without causing a problem of an increase in tire weight.
Claims3
A pneumatic tire comprising:
- a buffer rubber layer containing short fibers arranged between an inner liner layer and a carcass layer, said buffer rubber layer having a thickness of 0.1 mm to 0.5 mm and extending in bead direction at least 20 mm from an edge of a widest width belt layer, said short fibers being formed from polyvinyl alcohol and having a dimension of 0.01 to 10 μm (diameter) and 0.1 to 5 mm (length), and an inner liner layer comprising a film of thermoplastic resin, or a blend of thermoplastic resin and an elastomer, having an air permeation coefficient of not more than 25×10−12 cc·cm/cm2·sec·cmHg and a Young's modulus of 1 to 1000 MPa, wherein the buffer rubber layer containing short fibers is arranged between the inner liner layer and a carcass layer in bead directions from two ends of a widest belt layer in ranges of at least 20 mm.
Dependencies are inferred from the claim text.