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Tire

A technology for tires and treads, which is applied to special tires, tire parts, tire edges, etc., can solve the problems of increased rubber rigidity, high rubber hardness, and use restrictions, and achieve the effect of improving ride comfort and handling stability

Pending Publication Date: 2022-05-27
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if the fiber size (especially fiber length) of the fiber material is too large, there is a problem that the hardness of the rubber becomes too high and the rigidity of the rubber becomes high, so that the use in tire parts is limited

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0118] Although the present invention will be described based on the embodiments, the present invention is not limited to the embodiments.

[0119] Various chemicals used in Examples and Comparative Examples are shown below.

[0120] NR: TSR20

[0121] BR1: Ubepol BR150B manufactured by Ube Kosan Co., Ltd. (cis content: 97%)

[0122] BR2: Ubepol VCR617 manufactured by Ube Kosan Co., Ltd. (cis content: 98%)

[0123] SBR: SBR1502 manufactured by JSR Corporation (E-SBR, styrene content: 23.5% by mass, vinyl content: 18 mol%, Mw: 420,000)

[0124] Organic nanomaterial 1: Cellenpia manufactured by Nippon Paper Co., Ltd. (cellulose nanofibers, average diameter: 3 nm to 4 nm, average length: several hundreds of nanometers to 1 μm)

[0125] Organic nanomaterial 2: BiNFi-s FMa-10002 manufactured by Sugino Machinery Co., Ltd. (cellulose nanofibers, viscosity of 2 mass % dispersion: 700 mPa·s, average diameter: 20 nm, average length: 0.55 μm)

[0126] Organic nanomaterial 3: BiNFi-s ...

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Abstract

A tire, the tire including: a tread portion extending in a circumferential direction to form a toroidal shape; a pair of sidewall portions provided on both sides of the tread portion; a pair of bead portions, each of the pair of bead portions having a bead core; the at least one tire body layer is fixed on the tire bead core; and a chafer which is in contact with the rim, wherein the tire is provided with a rubber layer at a position on the axial outer side of the tire relative to the tire-most tire body layer and on the axial inner side of the tire relative to the tire side wall surface, the rubber layer is formed by a rubber composition, and the rubber composition comprises an organic nanometer material with shape anisotropy; the rubber layer is arranged to cover a part or all of an area of 25%-50% of the tire cross section height H; wherein the rubber composition satisfies the following inequality (1) and (2): tan [delta] (70 DEG C) > = 0.08 (1) 1.10 < = (M100a / M100b) < = 1.50 (2), where tan [delta] (70 DEG C) in inequality (1) represents tan [delta] when viscoelasticity measurement is performed under the conditions of an initial strain of 10%, a dynamic strain amplitude of 1%, a frequency of 10 Hz, and a temperature of 70 DEG C, M100a in inequality (2) represents a 100% modulus in the texture direction, and M100b represents a modulus in the texture direction. In inequality (2), M100b represents a 100% modulus in the transverse texture direction.

Description

technical field [0001] The present invention relates to a tire having a well-balanced improved ride comfort and handling stability. Background technique [0002] A technique for imparting modulus anisotropy to rubber by compounding a fibrous material (eg, cellulose fiber) in a tire component is known (eg, Patent Document 1). [0003] prior art literature [0004] Patent Literature [0005] Patent Document 1: JP 5691463 B SUMMARY OF THE INVENTION [0006] Problem to be solved by the present invention [0007] However, if the fiber size (in particular, the fiber length) of the fiber material is too large, there is a problem that the rubber hardness becomes too high and the rubber rigidity becomes high, so that the use in tire components is limited. In addition, rubber compositions containing conventional fiber materials have high elastic modulus, and currently cannot sufficiently satisfy market demand values ​​in terms of ride comfort and vibration. [0008] It is an ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/06B60C1/00C08L7/00C08L9/00C08L9/06C08L1/02
CPCB60C15/06B60C1/00C08L7/00C08L9/00B60C2001/005C08L9/06C08L1/02C08L21/00B60C2001/0058B60C1/0025B60C2013/006B60C2015/0617B60C15/0607B60C2015/061Y02T10/86
Inventor 吉安勇人
Owner SUMITOMO RUBBER IND LTD