FR2302873A2 - Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics - Google Patents

Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics

Info

Publication number
FR2302873A2
FR2302873A2 FR7507121A FR7507121A FR2302873A2 FR 2302873 A2 FR2302873 A2 FR 2302873A2 FR 7507121 A FR7507121 A FR 7507121A FR 7507121 A FR7507121 A FR 7507121A FR 2302873 A2 FR2302873 A2 FR 2302873A2
Authority
FR
France
Prior art keywords
reinforcement
yarns
sub
holding characteristics
denier
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
FR7507121A
Other languages
French (fr)
Other versions
FR2302873B2 (en
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.)
Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
Original Assignee
Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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 Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA filed Critical Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
Priority to FR7507121A priority Critical patent/FR2302873A2/en
Publication of FR2302873A2 publication Critical patent/FR2302873A2/en
Application granted granted Critical
Publication of FR2302873B2 publication Critical patent/FR2302873B2/fr
Granted 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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/26—Folded plies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

Parent patent described a sub-tread reinforcement for high speed tyres. The reinforcement comprised a full-width flat bandage made of metallic or glass yarns of >200g/denier, the edges of which were enclosed by a wider but double-back bandage made of flexible aromatic polyamide yarns with a modulus of >=350g/denier. In this addn. the reinforcement structure is limited to use of flat bandages having an average density of 0.27-0.15 g/cm2. The upper limit restricts the reinforcement mass and consequent radial vibration, noise, heat and fatigue at high speeds. The lower limit ensures that the reinforcement is stiff enough to provide good road-holding characteristics. More specifically, the composite reinforcement involves 28 cables per 25.4 mm of 4 x 0.23 metallic yarns and 24 cables per 25.4 mm of 1500 x 2 yarns of aromatic polyamide (RTM-'Kevlar').
FR7507121A 1975-03-06 1975-03-06 Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics Granted FR2302873A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7507121A FR2302873A2 (en) 1975-03-06 1975-03-06 Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7507121A FR2302873A2 (en) 1975-03-06 1975-03-06 Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics

Publications (2)

Publication Number Publication Date
FR2302873A2 true FR2302873A2 (en) 1976-10-01
FR2302873B2 FR2302873B2 (en) 1978-10-06

Family

ID=9152240

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7507121A Granted FR2302873A2 (en) 1975-03-06 1975-03-06 Fabric density limits for sub-tread reinforcement - to balance radial inertia and road holding characteristics

Country Status (1)

Country Link
FR (1) FR2302873A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428533A1 (en) * 1978-06-14 1980-01-11 Uniroyal Stiff tyre sub-tread reinforcement plies - enclosed in a relatively flexible envelope to obtain low rolling resistance without ply border delamination
EP0410673A2 (en) * 1989-07-24 1991-01-30 Sumitomo Rubber Industries Limited A Radial tyre for heavy duty vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428533A1 (en) * 1978-06-14 1980-01-11 Uniroyal Stiff tyre sub-tread reinforcement plies - enclosed in a relatively flexible envelope to obtain low rolling resistance without ply border delamination
EP0410673A2 (en) * 1989-07-24 1991-01-30 Sumitomo Rubber Industries Limited A Radial tyre for heavy duty vehicles
EP0410673A3 (en) * 1989-07-24 1991-08-28 Sumitomo Rubber Industries Limited A radial tyre for heavy duty vehicles
US5201969A (en) * 1989-07-24 1993-04-13 Sumitomo Rubber Industries, Ltd. Radial tire for heavy duty vehicle including a folded belt layer

Also Published As

Publication number Publication date
FR2302873B2 (en) 1978-10-06

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