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Tire tread with improved snow/dry traction

A tire tread and tread technology, applied in the direction of tire tread/tread pattern, special tires, tire parts, etc., can solve the problems of reduced dry braking performance, increased glass transition temperature of tread mixture, etc.

Inactive Publication Date: 2014-05-28
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these approaches generally lead to a reduction in dry braking performance, which is known to be improved by increasing the glass transition temperature of the tread compound and / or by reducing the number of sipes in the tread

Method used

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  • Tire tread with improved snow/dry traction
  • Tire tread with improved snow/dry traction
  • Tire tread with improved snow/dry traction

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0084] Two successive stages of preparation (a first stage of thermomechanical processing at high temperature followed by a second stage of mechanical processing at a lower temperature) can generally be used, in a manner known to those skilled in the art at suitable A rubber composition as an example of the present invention was prepared in a mixer of .

[0085] The first stage of thermomechanical processing (sometimes referred to as the "non-production" stage) is intended to thoroughly mix by kneading the various ingredients of the composition, except the vulcanization system. This stage is carried out in suitable kneading equipment (such as internal mixers or extruders) until, under the action of mechanical processing and high shear applied to the mixture, a temperature of usually between 120°C and 190°C is reached, preferably Narrowly the maximum temperature is between 130°C and 170°C.

[0086] After the mixture has cooled, a second stage of mechanical processing is carrie...

example 1

[0104] Rubber compositions were prepared using the components shown in Table 1. The amounts of each component constituting the rubber composition shown in Table 1 are given in parts by weight per 100 parts by weight of rubber (phr). SBR is an oil extended rubber (with 10 phr MES) with a Tg of -27°C and BR has a Tg of -104°C.

[0105]The terpene resin was SYLVARES TR-5147, a polylimonene resin available from Arizona Chemical, Savannah, GA. The plasticizing oil is naphthenic and / or sunflower oil. Silica is ZEOSIL160, that is, BET is 160m 2 / g of highly dispersible silica available from Rhodia. The silane coupling agent was X50-S available from Evonik Degussa. The cure package contains sulfur, accelerators, zinc oxide and stearic acid.

[0106] Rubber formulations were prepared by mixing the components given in Table 1 (except sulfur and accelerators) in a Banbury mixer operating between 25 and 65 RPM until a temperature between 130°C and 170°C was reached. Accelerators and...

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PUM

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Abstract

Tire treads, having one or more repeating pitches, each repeating pitch comprising individual pitches having tread blocks with sipes formed therein and each pitch having a pitch length of between 15 mm and 35 mm. Such treads may also have a weighted, average sipe density Dw of between 10 mm-1 and 37 mm-1, which is determined through the disclosed Eq. 2 below. The tread blocks are also formed from a rubber composition based upon a diene elastomer, a plasticizing system and a cross-linking system, wherein the rubber composition has a glass transition temperature of between -40 DEG C and -15 DEG C and a shear modulus G* measured at 60 DEG C of between 0.5 MPa and 1.1 MPa.

Description

technical field [0001] The present invention relates generally to tires for vehicles, and more particularly to tread carving and tread materials. Background technique [0002] It is known in the industry that tire designers must often compromise certain characteristics of the tires they design. Changing the tire design to improve one property of the tire often results in a trade-off, ie, an offsetting decrease in another tire property. One such compromise exists between snow traction and dry braking. Snow traction can be improved by lowering the glass transition temperature of the tread compound and / or by increasing the number of sipes in the tread. However, these approaches generally lead to a reduction in dry braking performance, which is known to be improved by increasing the glass transition temperature of the tread compound and / or by reducing the number of sipes in the tread. [0003] Tire designers and those conducting research in the tire industry seek materials an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C11/0332B60C1/0016B60C2011/1209B60C2011/1213B60C2011/0025B60C2011/129B60C11/11B60C2011/0337B60C11/0008B60C11/0318B60C11/12
Inventor O·皮法尔X·圣蒂尼R·斯塔布菲尔德C·吉雄
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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