CA2010462A1 - Radial tire - Google Patents

Radial tire

Info

Publication number
CA2010462A1
CA2010462A1 CA 2010462 CA2010462A CA2010462A1 CA 2010462 A1 CA2010462 A1 CA 2010462A1 CA 2010462 CA2010462 CA 2010462 CA 2010462 A CA2010462 A CA 2010462A CA 2010462 A1 CA2010462 A1 CA 2010462A1
Authority
CA
Canada
Prior art keywords
central portion
shore
hardness
shoulder
tread
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.)
Granted
Application number
CA 2010462
Other languages
French (fr)
Other versions
CA2010462C (en
Inventor
Kazuhiko Kawamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Rubber Industries Ltd
Original Assignee
Kazuhiko Kawamura
Sumitomo Rubber Industries Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kazuhiko Kawamura, Sumitomo Rubber Industries Limited filed Critical Kazuhiko Kawamura
Publication of CA2010462A1 publication Critical patent/CA2010462A1/en
Application granted granted Critical
Publication of CA2010462C publication Critical patent/CA2010462C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
    • B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
    • B60C11/0058—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers with different cap rubber layers in the axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
    • B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
    • B60C11/0075—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers with different base rubber layers in the axial direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A radial tire which is provided herein has a tread comprising a central portion and two lateral shoulder portions made of a rubber composition which is different from that of the central portion. The axial distance of each of the boundaries between the radially-outer surface of the central portion and the radially-outer surfaces of the shoulder portions from the tire equator are not less than 0.15 times and not more than 0.3 times the tread width. The tread includes a shoulder portion and two shoulder portions. The tread is provided with two circumferentially-extending grooves, the boundary between the central portion and each shoulder portion being located within the width of each of the grooves in the tread. The rubber composition of the shoulder portions consists of: natural rubber, butadiene rubber of which trans-1,4-bond content is not less than 54% and less than 70%, and carbon black of 10 to 30 microns in particle diameter. The ratio of the natural rubber content to the butadiene rubber content in part-by-weight unit is 85/15 to 20/80. The carbon black content is 20 to 70 parts by weight. The Shore-A hardness of the shoulder portion is larger than the Shore-A hardness of the central portion. The difference between the Shore-A
hardness of the shoulder portion and the Shore-A hardness of the central portion is 2 degrees and not more than 6 degrees. The Shore-A hardness of the shoulder portion is in the range of 65 to 75 degrees, and the Shore-A hardness of the central portion is in the range of 60 to 70 degrees.
CA 2010462 1989-02-23 1990-02-20 Radial tire Expired - Fee Related CA2010462C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1044671A JPH02249706A (en) 1989-02-23 1989-02-23 Radial tire
JP01-44671 1989-02-23

Publications (2)

Publication Number Publication Date
CA2010462A1 true CA2010462A1 (en) 1990-08-23
CA2010462C CA2010462C (en) 1997-03-18

Family

ID=12697908

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2010462 Expired - Fee Related CA2010462C (en) 1989-02-23 1990-02-20 Radial tire

Country Status (2)

Country Link
JP (1) JPH02249706A (en)
CA (1) CA2010462C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5622575A (en) * 1994-06-10 1997-04-22 Continental Aktiengesellschaft Pneumatic vehicle tire with a symmetrical carcass, symmetrical belt plies, and an asymmetrical tread
DE112013001701B4 (en) 2012-03-23 2019-06-19 The Yokohama Rubber Co., Ltd. tire

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100539149B1 (en) * 1998-12-31 2006-03-14 한국타이어 주식회사 Passenger car tires for improved ride comfort and high-speed driving performance
KR100451860B1 (en) * 2002-06-27 2004-10-08 금호타이어 주식회사 Pneumatic tire with multi tread rubber composition
KR100459665B1 (en) * 2002-07-31 2004-12-03 금호타이어 주식회사 Pneumatic tire with multi tread
KR100459666B1 (en) * 2002-07-31 2004-12-03 금호타이어 주식회사 Pneumatic tire with multi tread
JP4995560B2 (en) * 2006-12-22 2012-08-08 住友ゴム工業株式会社 Run flat tire
JP4962125B2 (en) * 2007-05-01 2012-06-27 横浜ゴム株式会社 Pneumatic tire
JP5139757B2 (en) * 2007-09-06 2013-02-06 住友ゴム工業株式会社 Run flat tire
US20100051164A1 (en) * 2008-08-29 2010-03-04 Robert Anthony Neubauer Modular ply tire with dissimilar materials
JP5453157B2 (en) * 2010-04-01 2014-03-26 株式会社ブリヂストン Pneumatic tire
ITTO20120353A1 (en) * 2012-04-20 2013-10-21 Bridgestone Europ Nv METHOD AND PLANT FOR THE PRODUCTION OF A TREAD STRIP OF A TIRE PROVIDED WITH BARS
EP3727896B1 (en) * 2017-12-21 2022-02-02 Compagnie Generale Des Etablissements Michelin Crown architecture of an electrically conductive tyre for a civil engineering vehicle
JP7360021B2 (en) * 2019-08-26 2023-10-12 横浜ゴム株式会社 Pneumatic tires for heavy loads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5622575A (en) * 1994-06-10 1997-04-22 Continental Aktiengesellschaft Pneumatic vehicle tire with a symmetrical carcass, symmetrical belt plies, and an asymmetrical tread
DE112013001701B4 (en) 2012-03-23 2019-06-19 The Yokohama Rubber Co., Ltd. tire

Also Published As

Publication number Publication date
JPH02249706A (en) 1990-10-05
CA2010462C (en) 1997-03-18

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed