Title:
【発明の名称】空気入りタイヤ
Document Type and Number:
Japanese Patent JP2816861
Kind Code:
B2
Abstract:
PURPOSE:To improve the performance on icy road without deteriorating crack resistance and wear resistance of a tread portion having duplex structure by specifying volume of a base tread and composition of a cap tread, respectively. CONSTITUTION:A tread portion A of a tire has duplex structure composed of a base tread 2 and a cap tread 1 arranged outside the base tread 2. In this case, the volume of base tread 2 is determined so as to be 5 to 20% of total volume of the tread A. At the same time, the cap tread 1 is composed of matrix rubber, which contains carbon black by 40 to 100% of raw material rubber in weight, and low hardness vulcanized rubber, which has particles of 0.5 to 3mm in mean diameter and is 4 to 50% of the raw material rubber in weight. Moreover, the above-mentioned composite contains carbon black of 10% or less of natural rubber in weight and has breaking strength of 300kgf/cm<2> or more and 500% modulus of 40 to 100kgf/cm<2> or more.
Inventors:
Inoue Masao
Kida Masaru
Shingo Midorikawa
Tokieda clearly
Takeshi Yoshikawa
Kida Masaru
Shingo Midorikawa
Tokieda clearly
Takeshi Yoshikawa
Application Number:
JP14539689A
Publication Date:
October 27, 1998
Filing Date:
June 09, 1989
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO.,LTD.
International Classes:
B60C1/00; B60C11/00; C08L21/00; (IPC1-7): B60C1/00; B60C11/00; C08L21/00
Domestic Patent References:
| JP6392659A | ||||
| JP63172750A | ||||
| JP60139503A | ||||
| JP53133248A | ||||
| JP50150755A | ||||
| JP53133248A | ||||
| JP55145744A | ||||
| JP1165635A | ||||
| JP653833B2 | ||||
| JP725952B2 | ||||
| JP422927B2 |
Other References:
【文献】Vanderbilt Ruhber Handbook,バンダービルト社 米国 バンダービルト社,1978年 第652頁
Attorney, Agent or Firm:
Shinichi Ogawa (2 outside)