Pneumatic tire

Patent metadata

Field	Value
Publication number	US-10850575-B2
Application number	US-201515516466-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Oct 17, 2014
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

Provided is a pneumatic tire in which a sealant layer entirely exhibits sufficient sealing performance. The present invention relates to a pneumatic tire including a sealant layer located radially inside an innerliner, the sealant layer being formed by continuously and spirally applying a generally string-shaped sealant to the inner periphery of a tire in the tire width direction from one side to the other, the attachment start portion of the sealant being located tire-widthwise inward from the tire-widthwise end of the sealant layer.

First claim

The invention claimed is:

1. A pneumatic tire, comprising:
a sealant layer located radially inside an innerliner,
wherein the sealant layer is formed by continuously and spirally applying a generally string-shaped sealant to the inner periphery of a tire in a tire width direction from one side to the other,
wherein one end in the longitudinal direction of the sealant is located tire-widthwise inward from a tire-widthwise end of the sealant layer as to form an attachment start portion,
wherein the viscosity at 40° C. of the sealant is 3,000 Pa·s to 70,000 Pa·s,
wherein the sealant layer has a segment from the one end in the longitudinal direction of generally string-shaped sealant to the tire-widthwise end of the sealant layer and an adjacent segment from the tire-widthwise end of the sealant layer to the other tire-widthwise end of the sealant layer,
wherein the adjacent segment from the tire-widthwise end of the sealant layer to the other tire-widthwise end of the sealant layer is located radially inside the segment from the one end in the longitudinal direction of generally string-shaped sealant to the tire-widthwise end of the sealant layer,
wherein the segment from the one end in the longitudinal direction of generally string-shaped sealant to the tire-widthwise end of the sealant layer being formed of a generally string-shaped sealant provided continuously along an inner periphery of the tire,
wherein the adjacent segment from the tire-widthwise end of the sealant layer to the other tire-widthwise end of the sealant layer being formed of a generally string-shaped sealant provided continuously and spirally, and
wherein every value of generally string-shaped sealant volume per unit length in the longitudinal direction of the generally string-shaped sealant is smaller in the segment from the one end in the longitudinal direction of generally string-shaped sealant to the tire-widthwise end of the sealant layer than in the adjacent segment from the tire-widthwise end of the sealant layer to the other tire-widthwise end of the sealant layer.

2. The pneumatic tire according to claim 1 ,
wherein the sealant comprises a rubber component including a butyl-based rubber, a liquid polymer, and an organic peroxide, and
wherein the sealant comprises 1 to 30 parts by mass of an inorganic filler relative to 100 parts by mass of the rubber component.

3. The pneumatic tire according to claim 1 ,
wherein the sealant layer has a thickness of 1.0 to 10.0 mm.

4. The pneumatic tire according to claim 1 ,
wherein the tire comprises at least one breaker, and the sealant layer has a width that is 85% to 115% of that of a widest breaker of the tire.

5. The pneumatic tire according to claim 1 ,
wherein the sealant layer is formed by sequentially preparing a sealant by mixing raw materials including a crosslinking agent using a continuous kneader, and sequentially applying the sealant to an inner periphery of a tire.

Assignees

• Sumitomo Rubber Ind

Inventors

• Yukawa Naoki
• Kida Yogun
• Sugimoto Mutsuki
• Yamada Satoshi

Classifications

• B60C19/12 Primary

  Puncture preventing arrangements · CPC title

• B60C19/122 Primary

  disposed inside of the inner liner · CPC title

• B60C19/002 Primary

  Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior · CPC title

• B60C11/1353

  with special features of the groove bottom · CPC title

• B60C5/14

  with impervious liner or coating on the inner wall of the tyre · CPC title