Tire

Patent metadata

Field	Value
Publication number	US-9770949-B2
Application number	US-201314381292-A
Country	US
Kind code	B2
Filing date	Feb 28, 2013
Priority date	Feb 29, 2012
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A tire includes a circular tire frame body formed of a resin-containing material. The resin material has a sea-island structure including a sea phase constituted by a first resin material and an island phase constituted by a second resin material, and the island phase is harder than the sea phase.

First claim

The invention claimed is:

1. A tire comprising a circular tire frame body formed of a resin-containing material, a reinforcing cord layer that comprising at least a reinforcing cord that helically wound on an outer circumferential surface of a crown portion of the tire frame,
the resin material having a sea-island structure including a sea phase constituted by a first resin material and an island phase constituted by a second resin material, and the island phase being harder than the sea phase;
wherein an elastic modulus of the resin containing material is 100-700 MPa,
the first thermoplastic resin is a thermoplastic polyamide-based elastomer, and the second resin material is a polyphenylene ether,
the second resin material has a tensile elastic modulus of 1000 MPa or greater,
the content ratio by mass of the first thermoplastic resin to the second resin material is from 70:30 to 80:20,
a tensile elastic modulus γ1 of the first resin material and a content W1 of the first resin material in the entire resin-containing material, and a tensile elastic modulus γ2 of the second resin material and a content W2 of the second resin material in the entire resin-containing material satisfy following Inequality (1):
0.25≦((γ1× W 1)/(γ2× W 2))≦2  Inequality (1)

the reinforcing cord layer is configured to include a resin material, and an outer circumferential portion of the tire frame is formed of the reinforcing cord layer.

2. The tire according to claim 1 , wherein the resin material includes at least one selected from the group consisting of an anti-aging agent, an ultraviolet absorber, a flame retardant, and an antistatic agent.

Assignees

• Bridgestone Corp

Inventors

• Fudemoto Hiroyuki
• Harada Takashi
• Gao Tong
• Honjo Atsuko

Classifications

• C08G69/40

  Polyamides containing oxygen in the form of ether groups (C08G69/12, C08G69/32 take precedence) · CPC title

• B60C2001/0066

  Compositions of the belt layers · CPC title

• B60C1/00 Primary

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08L23/06

  Polyethylene · CPC title

• B60C5/01

  without substantial cord reinforcement, e.g. cordless tyres, cast tyres · CPC title