A pneumatic tyre with low gas permeability
AssigneeNokian Renkaat Oyj
InventorsAnne OJALA, Noora KEMPPAINEN
Life of this patent
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Abstract
A pneumatic tire is for a motor vehicle. The pneumatic tire includes a first side that is an inner side of the pneumatic tire, and an opposite second side. A least a part of the pneumatic tire has rubber-based material that is configured to restrict gas permeability and that includes lignin that has been treated by hydrothermal carbonization. The rubber-based material or a coating of the rubber-based material forms at least a part of the first side of the pneumatic tire. A method is for manufacturing a pneumatic tire.
Claims22
A pneumatic tire for a motor vehicle, the pneumatic ye tire comprising:
- rubber-based material
- configured to restrict gas permeability and
- comprising lignin that has been treated by hydrothermal carbonization,
- a first side that is an inner side of the pneumatic tire,
- an opposite second side, and
- reinforcing material,
- wherein the rubber-based material or a coating of the rubber-based material forms at least a part of the first side of the pneumatic tire, and
- wherein at least some of the rubber-based material comprising lignin that has been treated by hydrothermal carbonization is arranged between the inner side of the pneumatic tire and the reinforcing material.
2-30. (canceled)
A method for manufacturing a pneumatic tire for a motor vehicle, the method comprising:
- arranging a rubber-based component onto a building drum to form a tubular preform for the pneumatic tire for a motor vehicle,
- expanding the tubular preform to form a carcass of the pneumatic tire,
- arranging a metal component and a textile component onto the carcass, thereby manufacturing a preform of the pneumatic tire,
- curing the preform of a pneumatic tire, thereby bonding the components together by means of curing,
- receiving rubber-based material that has been formed by mixing lignin that has been treated by hydrothermal carbonization and rubber-based matrix material for restricting gas permeability of the rubber-based material, and
- arranging the rubber-based material onto the building drum before said expanding the tubular preform to form a carcass of the pneumatic tire, and/or
- arranging the rubber-based material onto an inner surface of the carcass, the method comprising:
- arranging reinforcing material such that at least some of the rubber-based material that comprises lignin that has been treated by hydrothermal carbonization is arranged between the inner side of the pneumatic tire and the reinforcing material.
The method of any of claim 22, wherein:
- the rubber-based material comprises magnesium oxide (MgO) and/or zinc oxide (ZnO).
The method of claim 22, comprising:
- arranging the rubber-based material onto the building drum before said expanding the tubular preform to form a carcass of the pneumatic tire such that the rubber-based material forms a radially innermost layer of the materials arranged on the building drum.
Dependencies are inferred from the claim text.