 Self-sealing pneumatic tire |
| OF THE INVENTION FIG. 1 is a cross-sectional view of the self-sealing pneumatic tire of this ... |
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| Method of preparing a self-sealing pneumatic tire |
| I claim: 1. A method of preparing a self-sealing pneumatic tire which comprises (A) building a ... |
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| Radial tire for industrial vehicles |
| It is an object of this invention to provide a pneumatic tire for industrial vehicles which is free ... |
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| Puncture-sealing tire |
| A puncture-sealing tubeless pneumatic tire has a soft (25-40 Shore A durometer), vulcanized inner ... |
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| Polypropylene films |
| We claim: 1. A biaxially oriented polypropylene film containing from 1 to 40 percent by weight of a ... |
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| Tire with self-sealing inner coating |
| What is claimed is: 1. A tire having a tread, sidewalls and an inner wall, said inner wall having, ... |
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| Method for the forming of plastics |
| The invention relates to a method for the forming of thermoplastic and/or elastomeric resins with ... |
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| Method and apparatus for powder coating elongated objects |
| OF THE INVENTION Referring now to the drawings, an apparatus according to this invention for the ... |
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| Multilayer stitched knitted fiberglass composite |
| One object of this invention is to overcome the above-noted defects. Another object of this ... |
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Sealant laminates
| Details |
Inventors: Bohm, Georg G. A.; Anderson, John N.;
Assignee: The Firestone Tire & Rubber Company (Akron, OH)
Primary Examiner: Kittle; John E.
Assistant Examiner:
Attorney, Agent or Firm:
This disclosure relates to a sealant material to be primarily used in pneumatic tires to seal punctures made by external objects, such as nails. The sealant may be in a single layer or a laminate of sealant layer and covered layers. The sealant layer contains a material that is at least partially degraded by irradiation or heat in the presence of a peroxide. The laminate may be in sheet or strip form with various cross-sectional shapes. The layers in the laminate comprise rubber compounds, some of which may contain agents which either assist or retard cure by irradiation so that the layers will have different physical characteristics during the manufacture of end products containing the laminate. The laminate may be cured by any known method, either irradiation or thermal, after its assembly into the final product. |
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DETAILED DESCRIPTION OF THE INVENTION FIGS.
1 and 2 are partial cross-section views of this invention as embodied in a sealant containing innerliner for tires.
FIG.
3 is a partial cross-section view of this invention as embodied in a contoured, sealant containing innerliner for tires.
FIG.
4 is a partial cross-sectional view of another embodiment of this invention which is used for a self-sealing innerliner for tires.
FIG.
5 is a cross-sectional view of a tire embodying this invention as an innerliner.
FIG.
6 is a cross-sectional view of a tire embodying this invention wherein the sealant layer is only located in the crown of the tire.
In FIG.
1 the laminate is shown generically as 10 having internal layer, 12, and two external layers, 11.
The internal layer contains a material which will degrade when subjected to irradiation or heat in the presence of a peroxide, or a blend of the degradable material and one that cross-links when subjected to irradiation or heat in the presence of a peroxide.
The outer layers, 11, are designed to be relatively uneffected by irradiation.
They may comprise a rubber compound designed to have air impermeability properties or a rubber compound designed to have good building tack.
An example of the latter type is a rubber compound comprising 100 parts of natural rubber, 45 parts of carbon black and other compounding ingredients, including the following which retard irradiation cross-links; Santoflex 13, Aromatic Oil, Sulfur and Sulfur Cure Accelerators.
When the irradiation system is used, the laminate, 10, after its construction, is subjected to an irradiation treatment which will degrade the degradable material in layer 12, whether this material be blended with one that cross-links or not; will cross-link the cross-linkable material in layer 12, if any is present; and will have little effect on layers 11.
The laminate is then placed in the final product and the subsequent processing steps accomplished to yield the final product, including the vulcanization thereof which cures layers 11 and does not degrade layer 12
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