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A tread made from multi compounds

A technology of tread and rubber composition, applied in the direction of tire tread/tread pattern, tire parts, vehicle parts, etc., can solve the problem that performance cannot be improved at the same time, and achieve the effect of improving performance

Active Publication Date: 2019-06-25
SOCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, with the solutions disclosed in these documents, the performance on winter (or white) roads and normal (or black) roads cannot be improved at the same time, and it is desired to further improve both performances at the same time and at a higher level

Method used

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  • A tread made from multi compounds
  • A tread made from multi compounds
  • A tread made from multi compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0067] The following will refer to figure 1 with figure 2 A tread 1 of a tire according to a first embodiment of the present invention is described.

[0068] figure 1 is a schematic plan view of the tread according to the first embodiment of the present invention. figure 2 is along figure 1 A cross-sectional view taken along the line II-II.

[0069] The tread 1 is a tread for a tire having a size 225 / 45R17 and comprises a contact surface 2 intended for contact with the ground during rolling, a plurality of grooves 3 having a depth D (not shown) and having a depth d (not shown), the grooves 3 and the cuts 4 are substantially along the axial direction, iefigure 1 Extend in the left and right directions. The tread 1 also comprises a plurality of circumferential grooves 31 extending in the circumferential direction. The circumferential groove 31 als...

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Abstract

Tread for a tire provided with a plurality of grooves and / or a plurality of incisions being disposed such that at least two grooves or two incisions or one groove and one incision being always withina contact patch, the tread comprising at least two rubber layers laminated in radial orientation, one rubber layer of the at least two rubber layers comprising a cap rubber layer and a base rubber layer being provided radially inward of the cap rubber layer, a modulus G* of the rubber composition constituting the base rubber layer is less than or equal to 2 MPa at -10 DEG C with imposed shear stress of 0.25 MPa and is more than or equal to 0.7 MPa at 40 DEG C with imposed shear stress of 0.70 MPa, and a modulus G* of the rubber composition constituting the cap rubber layer is at least 1 MPa higher than the modulus G* of the rubber composition constituting the base rubber layer at -10 DEG C with imposed shear stress of 0.25 MPa, and is less than the modulus G* of the rubber composition constituting the base rubber layer at 40 DEG C with imposed shear stress of 0.70 MPa.

Description

technical field [0001] The present invention relates to a tire tread, and in particular to a tire tread made of a plurality of mixtures providing improved winter ("white road") performance and non-winter ("black road") performance. Background technique [0002] In recent years, a type of tire known as an "all-season" tire has become popular, which is capable of driving on winter (or white) roads, such as snow-covered roads, while maintaining high-speed driving capabilities on usual (or black) roads . [0003] Furthermore, for tires known as "studless" tires suitable for driving on icy and / or snowy winter (or white) roads, it is desirable to improve while still improving performance on winter (or white) roads. [0004] In order to improve performance on winter (or white) roads, especially on snow, it is known to reduce the distance between the rubber elements of the tire tread defined by grooves and / or incisions, or to use soft rubber compositions to make up the tire tread...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/00
CPCB60C2011/0025B60C11/005B60C11/0008B60C11/0306
Inventor 内田友丈G·罗蒂樱田智哉
Owner SOCIETE DE TECH MICHELIN
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