JPS6430806A - Studless tire of less change in hardness - Google Patents
Studless tire of less change in hardnessInfo
- Publication number
- JPS6430806A JPS6430806A JP62188158A JP18815887A JPS6430806A JP S6430806 A JPS6430806 A JP S6430806A JP 62188158 A JP62188158 A JP 62188158A JP 18815887 A JP18815887 A JP 18815887A JP S6430806 A JPS6430806 A JP S6430806A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tread
- hardness
- belt
- barrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
PURPOSE:To reduce change in hardness by arranging an oil barrier having a specific ratio of compound polymer of halogenated butyl rubber between a tread and a belt. CONSTITUTION:An oil barrier is arranged between a tread and a belt to prevent a softening agent containing a low temperature plasticizer in the tread rubber from moving to the belt. At least 30 weight % of the polymer to be compounded into the oil barrier is substituted with halogenated butyl rubber such as chlorinated butyl rubber, brominated butyl rubber, etc. A high viscosity petroleum-based aromatic plasticizer which moves less in rubber is compounded in the barrier ply rubber at a volumetric content of at least about 40% of the total of liquid state compounding agent such as softening agent, plasticizer, etc., of the tread rubber. At the same time, the concentration gradient of the softening agent in the tread rubber and the barrier ply rubber are made small. Changes in hardness are thus restricted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188158A JPS6430806A (en) | 1987-07-27 | 1987-07-27 | Studless tire of less change in hardness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188158A JPS6430806A (en) | 1987-07-27 | 1987-07-27 | Studless tire of less change in hardness |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6430806A true JPS6430806A (en) | 1989-02-01 |
Family
ID=16218769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62188158A Pending JPS6430806A (en) | 1987-07-27 | 1987-07-27 | Studless tire of less change in hardness |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6430806A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7082976B2 (en) | 2001-12-11 | 2006-08-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire having tread portion formed of two layers |
-
1987
- 1987-07-27 JP JP62188158A patent/JPS6430806A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7082976B2 (en) | 2001-12-11 | 2006-08-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire having tread portion formed of two layers |
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