Tire

A tire and sidewall technology, applied in special tires, tire parts, reinforcement layers of pneumatic tires, etc., can solve the problems of rim damage, curb damage, reducing rolling resistance and improving tensile strength, etc.

Inactive Publication Date: 2010-09-01
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a method to reduce the loss tangent tanδ of the sidewall rubber, it is possible to reduce the amount of filler added, increase the particle size of carbon black, and add modified butadiene rubber, but generally the tensile strength will decrease
In addition, as a method of reducing the loss tangent tanδ of the lap adhesive, it is also possible to reduce the amount of filler added, increase the particle size of carbon black, and add modified butadiene rubber, but the tensile strength will still decrease, so It will cause damage caused by curbs, damage when the rim is installed, and wear of the rim friction
[0005] That is, it is difficult to simultaneously achieve reduction in rolling resistance and increase in tensile strength, and there is no tire with low rolling resistance and excellent strength

Method used

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Examples

Experimental program
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Embodiment

[0095] The present invention will be described more specifically based on examples, but the present invention is not limited thereto.

[0096]Next, various medicines used in Examples and Comparative Examples will be collectively described.

[0097] Natural Rubber (NR): RSS#3

[0098] Modified butadiene rubber (modified BR): Nipol BR1250H (modified BR, lithium initiator: lithium, tin atom content: 250ppm, Mw / Mn: 1.5, vinyl bond amount manufactured by Nippon Zeon Co., Ltd. : 10 to 13% by weight)

[0099] Butadiene rubber (BR): BR150B manufactured by Ube Industries, Ltd.

[0100] Epoxidized natural rubber (ENR): ENR25 (epoxidation rate: 25% by mole) manufactured by Kunpu Langasuri

[0101] Emulsion polymerized styrene-butadiene rubber (E-SBR): SBR1502 manufactured by JSR Corporation

[0102] Solution-polymerized modified styrene-butadiene rubber (modified S-SBR): HPR340 manufactured by JSR Corporation (bonded styrene amount: 10% by weight, coupled with alkoxysilane, introduce...

manufacture example 1～5

[0119] Vulcanization accelerator TBZTD: TBZTD (tetrabenzylthiuram disulfide) manufactured by Frekisis Co., Ltd. Production Examples 1 to 5 (rubber compositions for sidewalls)

[0120] According to the formulation shown in Table 1, a Banbury mixer was used to add chemicals other than sulfur and a vulcanization accelerator, and knead at a maximum temperature of 165° C. for 5 minutes to obtain a kneaded product. Then, sulfur and a vulcanization accelerator were added to the obtained kneaded product, and kneaded for 3 minutes at a maximum temperature of 97° C. using two-axis open rolls to obtain an unvulcanized rubber composition. The obtained unvulcanized rubber composition was rolled into a sheet shape in a die, and press-vulcanized at 170° C. for 12 minutes to produce vulcanized rubber sheets of Production Examples 1 to 5 (SW1 to 5).

manufacture example 6～9

[0121] Production Examples 6 to 9 (Rubber Compositions for Covering Carcass Cords)

[0122] According to the formulation shown in Table 2, a Banbury mixer was used to add chemicals other than sulfur and vulcanization accelerators, and knead at a maximum temperature of 165° C. for 5 minutes to obtain a kneaded product. Then, sulfur and a vulcanization accelerator were added to the obtained kneaded product, and kneaded for 3 minutes at a maximum temperature of 97° C. using two-axis open rolls to obtain an unvulcanized rubber composition. The obtained unvulcanized rubber composition was rolled into a sheet shape in a die, and vulcanized under pressure at 170° C. for 12 minutes to produce vulcanized rubber sheets of Production Examples 6 to 9 (CA1 to 4).

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Abstract

The object is to improve both of low rolling resistance and strength of a tire. Disclosed is a tire comprising a side-wall, a case and an inner liner, wherein the side-wall comprises a rubber composition (A) for a side-wall which comprises 100 parts by weight of a specific rubber component (A1) and 20 to 45 parts by weight of a filler (A2), the case has a code coated with a rubber composition (B) for a case code which comprises 100 parts by weight of a specific rubber component (B1) and 20-45 parts by weight of a filler (B2), and the inner liner comprises a rubber composition (C) for an inner liner which comprises 100 parts by weight of a rubber component (C1) containing a butyl rubber at a content of 35-80 wt% and 15-45 parts by weight of a carbon black (C2) having a nitrogen-absorption specific surface area of 20-45 m2 / g.

Description

technical field [0001] The present invention relates to a tire having both reduced rolling resistance and increased tire strength. Background technique [0002] For a long time, studies have been made to reduce the rolling resistance of tires (improving rolling resistance performance) to achieve lower fuel consumption of automobiles. In recent years, there has been an increasing demand for lower fuel consumption in automobiles, and more excellent low heat generation properties have been demanded. For example, as a method of reducing tire rolling resistance, a method of reducing the loss tangent tan δ of the tread, sidewall, breaker rubber, clinch, etc. is sequentially performed according to the amount of rubber used. [0003] As an attempt to reduce the rolling resistance of tire components, for example, Japanese Patent Laid-Open No. 5-320421 describes that tin-modified polybutadiene rubber is used as the rubber component in the rubber composition for sidewalls, and Japanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00B60C5/14B60C9/04B60C13/00C08K3/00C08L7/00C08L9/00
CPCC08L7/00C08L9/06C08L21/00B60C1/0025C08K3/0033C08L15/00B60C2009/0276C08C19/06C08L9/00B60C1/0008B60C2013/006C08L23/22C08L2205/02C08K3/04C08K3/013Y02T10/86C08L2666/02C08L2666/08
Inventor 宫崎达也
Owner SUMITOMO RUBBER IND LTD
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