Strip, method for manufacturing the same, and method for manufacturing pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorMutsuki Sugimoto
Life of this patent
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Abstract
The strip is formed of a single layer including a first layer arranged in a tire innermost layer or composite layers of the first layer and a second layer disposed adjacently to a carcass ply and made of a thermoplastic elastomer composition. The first layer is a thermoplastic elastomer composition containing a styrene-isobutylene-styrene block copolymer and a tackifier, a butyl-based rubber and a natural rubber. The strip has a strip main body having a thickness (T1) of 0.02 to 1 0 mm and ear portions formed on opposite sides of the strip main body. The ear portions have a thickness (T2) smaller than the thickness (T1) and a width (W2) of 0.5 mm to 5.0 mm.
Claims10
A strip to be wound on an outer circumferential surface of a core body in a circumferential direction to form an inner liner having a shape close to a finished sectional shape of a tire,
- said strip being formed of one of a single layer including a first layer arranged in a tire innermost layer and composite layers of the first layer and a second layer disposed adjacently to a carcass ply and made of a thermoplastic elastomer composition,
- said first layer being a thermoplastic elastomer composition containing a styrene-isobutylene-styrene block copolymer and at least one kind of a tackifier, a butyl-based rubber and a natural rubber, and
- said strip having a strip main body having a thickness (T1) of 0.02 mm to 1.0 mm and ear portions formed on opposite sides of the strip main body, the ear portions having a thickness (T2) smaller than said thickness (T1) and a width (W2) of 0.5 mm to 5.0 mm.
A method for manufacturing a pneumatic tire, in which a strip is wound of an outer circumferential surface of a core body along a circumferential direction with its side edge offset to mold an inner liner having a shape close to a finished sectional shape or a tire, wherein
- (a) said strip is formed of one of a single layer including a first layer arranged in a tire innermost layer and made of a thermoplastic elastomer composition containing a styrene-isobutylene-styrene block copolymer and composite layers of the first layer and a second layer disposed adjacently to a carcass ply and made of a thermoplastic elastomer composition, and
- (b) said strip has a strip main body having a thickness (T1) of 0.02 to 1.0 mm and ear portions formed on opposite sides of the strip main body, the ear portions having a thickness (T2) smaller than said thickness (T1) and a width (W2) of 0.5 mm to 5.0 mm.
Dependencies are inferred from the claim text.