Pneumatic tire and method for manufacturing same

A technology for pneumatic tires and a manufacturing method, which is applied in the directions of pneumatic tires, tire parts, tire treads/tread patterns, etc., to achieve the effects of improving snow performance, suppressing temperature reduction, and reducing cavity resonance sound

Pending Publication Date: 2020-05-01
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for pneumatic tires used in winter, since the reduction of cavity resonance noise is not very required, the above-mentioned sound absorbing members are not currently used.

Method used

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  • Pneumatic tire and method for manufacturing same
  • Pneumatic tire and method for manufacturing same
  • Pneumatic tire and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] The tires of Comparative Examples 1 to 3 and Examples 1 to 6 were produced. The tire size of the pneumatic tire was 245 / 50R18, and in the pneumatic tire having a plurality of sipes formed on the land portion of the tread portion, as shown in Table 1. The presence or absence of sound-absorbing material, the thickness of the sound-absorbing material (mm), the JIS hardness of the tread rubber, the thickness (μm) of the release agent on the inner surface of the tire, and the amount of the release agent (silicon) on the inner surface of the tire are set. (weight%).

[0049] In Comparative Examples 2 to 3 and Examples 1 to 6, the hardness of the sound absorbing material was set to 80N / 314cm 2 , the tensile strength of the sound-absorbing material was set to 90 kPa, and the elongation at break of the sound-absorbing material was set to 130%. In addition, Comparative Examples 1 to 3 and Examples 1 to 3 were produced by vulcanizing a green tire using a normal bladder, and Examp...

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Abstract

Provided are a pneumatic tire in which snow performance can be improved at the same time that cavernous resonance is reduced on the basis of a sound-absorbing material, and a method for manufacturingthe pneumatic tire. A sound-absorbing material (6) is secured, along a tire circumference direction, to the inner surface of a tread section (1) via an adhesive layer (7). The thickness of the sound-absorbing material (6) is 20 mm or greater, the hardness of the sound-absorbing material (6) is 80 N / 314 cm<2> to 150 N / 314 cm<2>, the tensile strength of the sound-absorbing material (6) is 90 kPa orgreater, and the rupture elongation of the sound-absorbing material (6) is 130% or greater. The JIS hardness of tread rubber (11) in the tread section (1) is 50-68, and a land section formed in the tread section (1) has a plurality of sipes.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as a winter tire and a manufacturing method thereof, and more specifically, to a pneumatic tire capable of reducing cavity resonance sound and improving snow performance by a sound absorbing member and a manufacturing method thereof. Background technique [0002] In studless tires and pneumatic tires for winter use in snow tires, a plurality of sipes are provided in a tread pattern to exhibit snow performance. In order to secure snow traction and improve snow performance, it is effective to increase the number of sipe bars and increase the sipe density. In addition, in order to improve snow performance, it is also effective to use soft rubber (rubber with low JIS hardness) as the tread rubber. However, when such a tread rubber is used on a snowy road surface, it becomes hard, so there is a problem that desired tire performance cannot be exhibited. [0003] On the other hand, one of the causes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/00B29D30/08
CPCB29D30/0061B29D2030/0659B29D2030/0655B29D30/0654B60C2011/0016B60C11/12B60C19/002B29D30/0681B60C11/0008
Inventor 干场崇史
Owner THE YOKOHAMA RUBBER CO LTD
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