Pneumatic tire and process for producing the same

Patent metadata

Field	Value
Publication number	US-9962892-B2
Application number	US-86727809-A
Country	US
Kind code	B2
Filing date	Feb 24, 2009
Priority date	Mar 7, 2008
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

Provided is a pneumatic tire improved in the durability at a splice part ( 2 ) of a tire-constituting member ( 1 ) and in the uniformity of the tire, and a process for producing the same. The pneumatic tire includes a tire-constituting member ( 1 ) having a splice part ( 2 ) on which a thin film ( 3 ) made of a thermoplastic resin or a thermoplastic elastomer composition is coated and fusion-bonded. In addition, the process for producing the pneumatic tire includes a step of heating the thin films ( 3 ) each arranged at the splice part ( 2 ) of an inner liner layer ( 14 ) or the splice part ( 2 ) of a carcass layer ( 13 ) so as to thermally fusing the thermoplastic resin or the thermoplastic elastomer composition constituting the thin films ( 3 ).

First claim

What is claimed is:

1. A pneumatic tire having a configuration in which a sheet-shaped tire-constituting member is arranged in a tire circumferential direction while having end portions in the tire circumferential direction spliced to each other, wherein
the tire-constituting member is formed of rubber,
a splice part of the tire-constituting member is coated and fusion-bonded with a thin film consisting essentially of any one of a thermoplastic resin and a thermoplastic elastomer composition,
the splice part is formed in a butt configuration in which the end portions are butted to each other, and the thin film is present on radially inner and outer surfaces of the respective end portions of the tire constituting member and extends on both surfaces of the respective end portions, and
a total coating width of the thin film at the splice part is 30 to 60 mm in the tire circumferential direction.

2. The pneumatic tire according to claim 1 , wherein
the thin film is also interposed between the end portions.

3. The pneumatic tire according to claim 1 , wherein
an adhesive layer is arranged on a surface of the thin film, and
the adhesive layer is arranged to face the tire-constituting member.

4. The pneumatic tire according to claim 1 , wherein,
in the tire after curing, a thickness of the thin film is 10 to 1500 μm.

5. The pneumatic tire according to claim 1 , wherein
the tire-constituting member is any one of an inner liner layer and a carcass layer.

6. The pneumatic tire according to claim 5 , wherein the tire-constituting member is an inner liner layer made of a butyl-based rubber composition.

7. The pneumatic tire according to claim 1 , wherein the sheet-shaped tire-constituting member is one of an inner liner layer and a carcass layer, and the other of the inner liner layer and the carcass layer also includes a splice part which is coated and fusion-bonded with a thin film made of any one of the thermoplastic resin and the thermoplastic elastomer composition, and which has a total coating width of 30 to 60 mm in the tire circumferential direction.

Assignees

• Itoh Takanori
• Hatakeyama Takumi
• Yokohama Rubber Co Ltd

Inventors

• Itoh Takanori
• Hatakeyama Takumi

Classifications

• B60C5/14

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

• B60C2005/147

  characterised by the joint or splice · CPC title

• B60C2005/145

  made of laminated layers · CPC title

• B29D30/42 Primary

  Endless textile bands without bead-rings · CPC title