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Tires provided with tread bands for preventing abnormal grooves for vehicle wheels

A technology of grooves and tread bands, which is applied in the tire field of heavy-duty or commercial vehicle wheels, and can solve the problems of reduced vehicle maneuverability, loss of ride comfort, and increased tire noise

Active Publication Date: 2011-11-30
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In general, abnormalities in the form of loss of ride comfort and reduced vehicle handling are easily felt by the driver, especially when the abnormality is located in the steering tires
[0022] However, if the abnormal tire is a drive tire or is located on a trailer, the driver may not perceive any discomfort, however, he may hear an increase in tire noise

Method used

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  • Tires provided with tread bands for preventing abnormal grooves for vehicle wheels
  • Tires provided with tread bands for preventing abnormal grooves for vehicle wheels
  • Tires provided with tread bands for preventing abnormal grooves for vehicle wheels

Examples

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[0132] Table 1

[0133]

[0134] ( * ): Comparator

[0135] (^): The present invention

[0136] NR: natural rubber

[0137] BR: High cis 1,4 polybutadiene (Europrene Neocis BR40-Polimeri Europa);

[0138] Stearic acid: STEARINAN (SOGIS)

[0139] Zinc Oxide (Green Seal) (Zincol ossidi);

[0140] X50S : Silane coupling agent (EVONIK-Degussa) comprising 50% by weight of carbon black and 50% by weight of bis(3-triethoxysilylpropyl)tetrasulfide;

[0141] Waxes: compositions of microcrystalline waxes (Antilux 654-Lanxess);

[0142] Carbon black: (OAN value is close to 125 and COAN value is close to 100; OAN / COAN is measured by ASTM D2414)

[0143] Ultrasil VN3 : Silica (EVONIK-Degussa);

[0144] TMQ: Polymeric 2,2,4-trimethyl-1,2-dihydroquinoline (Vulcanox 4020-Bayer);

[0145] 6-PPD: p-phenylenediamine (Santofiex 13-Monsanto);

[0146] Soluble sulfur: (Flexsys);

[0147] CTP: Cyclohexylthiophthalimide (Vulkalent G-Bayer);

[0148] CBS (accelerator): N...

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Abstract

The present invention relates to a tire for vehicle wheels comprising: a tread band including a first elastomeric material with a first tear strength, and a plurality of circumferential grooves formed in said tread band, wherein each of said circumferential grooves is defined by a couple of lateral walls separated by a bottom, at least one of said grooves includes a protective layer of a second elastomeric material with a second tear strength superimposed on at least said groove bottom, and the ratio between the values of said second tear strength and said first tear strength is at least 1.5.

Description

technical field [0001] The present invention relates to a tire for a vehicle wheel provided with a tread band for preventing abnormal grooves. [0002] In particular, the invention relates to a tire for heavy duty or commercial vehicle wheels. Background technique [0003] Tires intended for vehicle wheels on heavy-duty vehicles (such as trucks, passenger cars, trailers, and the like) typically include a carcass structure with associated right-hand and left-hand bead structures. opposing lateral edges; a belt structure applied in a radially outer position relative to the carcass structure; a tread band radially superimposed on the belt ply structure; a pair of sidewalls applied laterally on opposite sides with respect to said carcass structure. [0004] Tires designed for use on heavily loaded vehicles, but also on slippery road surfaces, require in particular optimum characteristics in terms of traction capacity, pickup ability, steering characteristics and handling capab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/04
CPCB60C11/00C08K3/36B60C11/1346B60C2200/06B60C2011/0025B60C11/0306B60C11/04C08K3/0033C08L9/00C08L7/00B60C1/0016C08K3/04B60C2011/0033C08K3/013C08L2666/08
Inventor C·米诺利F·蒙塔纳罗M·马丁E·雷斯米尼
Owner PIRELLI TYRE SPA