Pneumatic tire

Patent metadata

Field	Value
Publication number	US-2016016432-A1
Application number	US-201514868545-A
Country	US
Kind code	A1
Filing date	Sep 29, 2015
Priority date	Sep 5, 2006
Publication date	Jan 21, 2016
Grant date	—

Abstract

A pneumatic tire having an air impermeable layer. A film formed of a thermoplastic resin or thermoplastic elastomer composition comprising a blend of a thermoplastic resin and an elastomer is used for the air impermeable layer. Separation of the film is prevented and an inner appearance of the tire is improved.
The air impermeable layer 10, which is disposed on the inner side of the tire, is formed from a laminated body 14 comprising a ribbon-shaped film 11 and ribbon-shaped elastomer plies 12 and 13 laminated on opposite sides thereof. The laminated body 14 is wound in the circumferential direction of the tire in such a partially overlapping manner that it is displaced at prescribed intervals. Each pair of adjacent wound portions 14 A and 14 B of the laminated body 14 are spliced to each other in a partially overlapping manner in a state where the ribbon-shaped film 11 is disengaged from itself.

First claim

What is claimed is:

1 . A pneumatic tire having an air impermeable layer disposed on an inner side of the tire, the air impermeable layer being formed of a thermoplastic resin or thermoplastic elastomer composition comprising a blend of a thermoplastic resin and an elastomer, wherein:
the air impermeable layer is formed from a laminated body comprising a ribbon-shaped film and at least two ribbon-shaped elastomer plies laminated on opposite sides thereof, the laminated body being wound in a circumferential direction of the tire in such a partially overlapping manner that it is displaced at prescribed intervals;
the ribbon-shaped film and the at least two ribbon-shaped elastomer plies each have opposite ends comprising one end on one side of the laminated body in a widthwise direction thereof and the other end on the other side of the laminated body in the widthwise direction thereof;
each pair of adjacent wound portions of the laminated body are spliced to each other in a partially overlapping manner in a state where the ribbon-shaped film is disengaged from itself,
each pair of adjacent wound portions of the laminated body are partially overlapped with each other in a state where the one end of any one of the at least two ribbon-shaped elastomer plies and the other end of any one of the at least two ribbon-shaped elastomer plies are spliced to each other in an overlapping manner,
the at least two ribbon-shaped elastomer plies are greater in width than the ribbon-shaped film;
one ribbon-shaped elastomer ply of the at least two ribbon-shaped elastomer plies is laminated on the ribbon-shaped film so as to be offset toward the other side of the laminated body in the widthwise direction thereof with respect to the ribbon-shaped film;
the other ribbon-shaped elastomer ply of the at least two ribbon-shaped elastomer plies is laminated on the ribbon-shaped film so as to be offset toward the one side of the laminated body in the widthwise direction thereof with respect to the ribbon-shaped film; and
each pair of adjacent wound portions of the laminated body are partially overlapped with each other in a state where the one end and the other end of the one ribbon-shaped elastomer ply are spliced to each other in a directly overlapping manner, and where the one end and the other end of the other ribbon-shaped elastomer ply are spliced to each other in a directly overlapping manner.

2 . The pneumatic tire according to claim 1 , wherein an offset amount of the one ribbon-shaped elastomer ply is at least 2 mm.

3 . The pneumatic tire according to claim 1 , wherein an offset amount of the other ribbon-shaped elastomer ply is at least 2 mm.

4 . The pneumatic tire according to claim 1 , wherein the ribbon-shaped film has a width of 5 mm to 70 mm.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Hashimura Yoshiaki
• Sawada Takahiko
• Kogure Tomohiko

Classifications

• B29D2030/0682

  Inner liners · CPC title

• B29D30/0681

  Parts of pneumatic tyres; accessories, auxiliary operations · CPC title

• B60C1/0008

  Compositions of the inner liner · CPC title

• B60C2005/147

  characterised by the joint or splice · CPC title

• B60C5/14 Primary

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