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 characteristicsInfo
- 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
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').
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)
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 |
-
1975
- 1975-03-06 FR FR7507121A patent/FR2302873A2/en active Granted
Cited By (4)
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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