US3211819A - Process for the production of tires of small dimensions - Google Patents
Process for the production of tires of small dimensions Download PDFInfo
- Publication number
- US3211819A US3211819A US3211819DA US3211819A US 3211819 A US3211819 A US 3211819A US 3211819D A US3211819D A US 3211819DA US 3211819 A US3211819 A US 3211819A
- Authority
- US
- United States
- Prior art keywords
- tires
- production
- small dimensions
- cabled yarns
- rubber
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 5
- 238000000034 method Methods 0.000 title description 3
- 229920002994 synthetic fiber Polymers 0.000 description 6
- 238000004073 vulcanization Methods 0.000 description 6
- 239000004758 synthetic textile Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 1
- 239000004429 Calibre Substances 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
Definitions
- This invention relates to the production of pneumatic tires, and relates more particularly to the preparation of pneumatic tires of small dimensions reinforced by cabled yarns of synthetic materials.
- Cabled yarns consisting of synthetic textile materials are being employed on an increasing scale in the reinforcement of pneumatic tires.
- polyamides such as polyhexamethylene adipamide
- these defects can be obviated and pneumatic tires reinforced with cabled yarns consisting of synthetic textile materials having entirely satisfactory appearance and properties can be produced without the aid of expansion after the prevulcanization by use of rubber preparations having a high rate of vulcanization, the rubber which envelopes the cabled yarns of synthetic textile fibres having to reach a sufficient consistency before the cabled yarns can contract due to thermal action.
- the process for the production of small size tires for bicycles which are reinforced by nylon tire cords, capable of undergoing shrinkage under the action of heat as used during vulcanization which comprises embedding said nylon tire cord reinforcement in a rubber mix which is capable of being vulcanized in three minutes at a temperature of C. molding and vulcanizing said mix at said temperature under conditions to produce a tire wherein the nylon cords have not been appreciably shrunken.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
United States Patent 3,211,819 PROCESS FOR THE PRODUCTION OF TIRES OF SMALL DIMENSIONS Raymond Guyot, Paris, France, assignor to Textiie &
Chemical Research Company (Vaduz) Limited, a corporation of Liechtenstein No Drawing. Filed Mar. 26, 1963, Ser. No. 267,915 Claims priority, application France, Mar. 29, 1962, 892,693 1 Ciaim. (Cl. 264326) This invention relates to the production of pneumatic tires, and relates more particularly to the preparation of pneumatic tires of small dimensions reinforced by cabled yarns of synthetic materials.
Cabled yarns consisting of synthetic textile materials, notably those based on polyamides such as polyhexamethylene adipamide, are being employed on an increasing scale in the reinforcement of pneumatic tires. In the case of tires of large calibre, it has proved necessary to subject the prevulcanized articles to an expansion in order to compensate for the shrinkage which cabled yarns consisting of synthetic textile fibres undergo at the vulcanization temperature.
However, expansion is impractical in the case of tires for bicycles for reasons of cost. In small-size tires for this application, cabled yarns of synthetic textile fibres have interesting advantages such as high tensile strength, low sensitivity to water and impact resistance. '1
The manufacture of small-size pneumatic tires Without expansion has given rise to serious disadvantages, of which the two main ones are:
(1) The cabled yarns tend to protrude into the interior of the tires.
(2) The tires are often greatly deformed and twisted.
These two defects are due to the shrinkage of cabled yarns at the vulcanization temperature.
According to the present invention, these defects can be obviated and pneumatic tires reinforced with cabled yarns consisting of synthetic textile materials having entirely satisfactory appearance and properties can be produced without the aid of expansion after the prevulcanization by use of rubber preparations having a high rate of vulcanization, the rubber which envelopes the cabled yarns of synthetic textile fibres having to reach a sufficient consistency before the cabled yarns can contract due to thermal action.
For cabled yarns consisting of polyhexamethylene adipamide, use is made more especially of preparations which have a vulcanization rate corresponding to 3 minutes or less, measured on the Wallace vulcanometer, at a vulcanization temperature of 140 C.
The invention is illustrated by the following example of an embodiment, but it is to be understood that this example has no limiting character and that the invention also includes any variant in the same spirit.
3,211,819 Patented Oct. 12, 1965 Example Natural rubber 110 Synthetic rubber SBR Carbon black 55 Inert mineral filler Mineral oil 8.5 Diphenylguanidine 0.9 Mercaptobenzothiazole 1.6 Zinc oxide 8.5 Sulphur 4 The calendered sheet is molded and it is vulcanized for 3 minutes at 185 C. The tires removed from the mold are free from the aforesaid defects and have entirely satisfactory appearance and properties.
It is to be understood that the foregoing detailed description is given merely by way of illustration and that many variations may be made therein without departing from the spirit of this invention.
What is hereby claimed and desired to be secured by Letters Patent is:
The process for the production of small size tires for bicycles which are reinforced by nylon tire cords, capable of undergoing shrinkage under the action of heat as used during vulcanization, which comprises embedding said nylon tire cord reinforcement in a rubber mix which is capable of being vulcanized in three minutes at a temperature of C. molding and vulcanizing said mix at said temperature under conditions to produce a tire wherein the nylon cords have not been appreciably shrunken.
References Cited by the Examiner UNITED STATES PATENTS 2,623,024 12/52 Barton 260-5 2,679,088 5/54 Mehergetal 152359 FOREIGN PATENTS 1/48 Great Britain.
OTHER REFERENCES Introduction To Rubber Technology, edited by Maurice 0 Morton, copyright 1959, pages 100 and 101 relied upon.
ARTHUR L. LA POINT, Primary Examiner.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3211819A true US3211819A (en) | 1965-10-12 |
Family
ID=3457739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US3211819D Expired - Lifetime US3211819A (en) | Process for the production of tires of small dimensions |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3211819A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140166A (en) * | 1976-05-19 | 1979-02-20 | Bridgestone Tire Company Limited | Pneumatic radial tire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597556A (en) * | 1945-05-01 | 1948-01-28 | Wingfoot Corp | Modified butadiene-styrene copolymers |
| US2623024A (en) * | 1951-05-31 | 1952-12-23 | Us Rubber Co | Method of making mixtures of rubbery butadiene-styrene copolymer, hevea rubber, and carbon black |
| US2679088A (en) * | 1949-05-05 | 1954-05-25 | Goodyear Tire & Rubber | Method of treating thermoplastic web |
-
0
- US US3211819D patent/US3211819A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597556A (en) * | 1945-05-01 | 1948-01-28 | Wingfoot Corp | Modified butadiene-styrene copolymers |
| US2679088A (en) * | 1949-05-05 | 1954-05-25 | Goodyear Tire & Rubber | Method of treating thermoplastic web |
| US2623024A (en) * | 1951-05-31 | 1952-12-23 | Us Rubber Co | Method of making mixtures of rubbery butadiene-styrene copolymer, hevea rubber, and carbon black |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140166A (en) * | 1976-05-19 | 1979-02-20 | Bridgestone Tire Company Limited | Pneumatic radial tire |
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