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Tire with component containing aramid fibers

A fiber, element technology used in the field of pneumatic tires to solve problems such as rubber dispersion and/or poor adhesion

Inactive Publication Date: 2009-06-24
THE GOODYEAR TIRE & RUBBER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such fiber orientation is often difficult to achieve in practice because of poor fiber dispersion and / or adhesion to the rubber

Method used

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  • Tire with component containing aramid fibers
  • Tire with component containing aramid fibers
  • Tire with component containing aramid fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In this example, the effect of adding short fibers to a traveler rubber composition according to the present invention is illustrated. According to the formula shown in Table 1, the rubber composition containing diene-based elastomer, filler, processing aid, anti-degradation agent and curing agent was prepared, all amounts are in parts by weight (phr) per 100 parts by weight of base elastomer give. Sample 1 contained no short fibers and was used as a control. Sample 2 includes 3000 staple and representative of the invention.

[0061] Rubber specimens were rolled into sheets and cut into tensile specimens. The tensile specimens were cut in two orientation directions, one in the direction of test pull parallel to the direction of specimen rolling and one in the direction of test pull perpendicular to the direction of specimen rolling. In this way, the effect of fiber orientation (usually in the rolling direction) and thus the anisotropy of the rubber composition is ...

Embodiment 2

[0089]In this example, the effect of adding short fibers to a traveler rubber composition according to the present invention is illustrated. According to the formula shown in Table 1, the rubber composition containing diene-based elastomer, filler, processing aid, anti-degradation agent and curing agent was prepared, all amounts are in parts by weight (phr) per 100 parts by weight of base elastomer give. Sample 3 contained no short fibers and was used as a control. Sample 4 includes 3000 staple and representative of the invention. Sample 5 included short aramid fibers treated with nylon and was a comparative sample.

[0090] Rubber specimens were rolled into sheets and cut into tensile specimens. The tensile specimens were cut in two orientation directions, one in the direction of test pull parallel to the direction of specimen rolling and one in the direction of test pull perpendicular to the direction of specimen rolling. In this way, the effect of fiber orientation (...

Embodiment 3

[0116] This example illustrates the effect of using a traveler comprising the rubber composition of the present invention. Three tires of the same mass were manufactured, each with a different wire wrap construction. The tire 1 was made with a flipper with conventional reinforcing cords. Tire 2 was made with a wire runner having a rubber compound with short oriented fibers of the present invention. The tire 3 is made with a flipper with a rubber compound without fibers or cords. The tangential stiffness of the tire is measured under rated tire load, measuring 20mm deflection under a load of 492kg. The results are shown in Table 3.

[0117] table 3

[0118] Tire No. Bead Cloth Reinforcement Vertical Stiffness (N / mm 2 )

[0119] 1 cord 278

[0120] 2 staple fiber 271

[0121] 3 none 264

[0122] As shown in Table 3, the tires made with the inventive traveler showed good vertical stiffness between the cord reinforced and unreinforced traveler.

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Abstract

The present invention is directed to a pneumatic tire comprising at least one of an apex, flipper, and chipper, the at least one of an apex, flipper, and chipper comprising a rubber composition, the rubber composition comprising a diene based elastomer and from 1 to 50 parts by weight, per 100 parts by weight of elastomer, of aramid fiber having a length ranging from 0.5 to 20 mm and having a thickness ranging from 2 to 30 microns, said fiber having disposed on at least part of its surface a composition comprising an aliphatic fatty acid or synthetic microcrystalline wax; a Bunte salt; a polysulfide comprising the moiety -[S] n or - [S] o -Zn-[S] p , wherein each of o and p is 1-5, o + p = n, and n = 2-6; and sulfur or a sulfur donor.

Description

technical field [0001] The present invention relates to pneumatic tires, and more particularly to pneumatic tires having staple fiber-containing elements. Background technique [0002] A tire is a composite of several elements, each serving a specific and unique role, but all working synergistically to produce the desired performance. One important element is the carcass ply. The carcass ply is a continuous layer of rubberized parallel cords that extend from bead to bead and function as reinforcing elements of the tire. The plies are turned-up around the beads, thereby locking the beads into the assembly or carcass. In the immediate vicinity of the carcass ply, the turnup is an apex. The apex comprises a rubber wedge located in the lower sidewall region above the bead, and is joined and covered by the carcass ply. The apex also includes a region between the lower sidewall rubber and the axially outer side of the carcass ply turnup. Between the bead and the apex, a flipp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/04B60C15/04B60C1/00C08L7/00C08L9/00C08J5/06
CPCB60C2015/0614C08L77/00C08L21/00C08K9/04B60C11/14C08K7/02B60C1/00Y10T152/10513C08L2666/20
Inventor A·莱希滕贝默D·G·维措雷克
Owner THE GOODYEAR TIRE & RUBBER CO
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