Rubber composition for tire, tire, and method for manufacturing the tire
AssigneeToyo Tire & Rubber Co., Ltd.
InventorFumihiko Nakamura
Life of this patent
Estimating the term…
Abstract
A rubber composition for a tire comprises 100 parts by mass of a rubber component comprising diene rubber, and from 0.5 to 20 parts by mass of pellets comprising paper powder and starch and having water content of 5 mass % or more. A tire is provided with a tread rubber part comprising a foamed rubber formed by the rubber composition. A method for manufacturing a tire comprises mixing from 0.5 to 20 parts by mass of pellets comprising paper powder and starch and having water content of 5 mass % or more with 100 parts by mass of a rubber component comprising diene rubber to prepare a rubber composition, producing an unvulcanized tire using the rubber composition obtained, and vulcanization molding the unvulcanized tire.
Claims12
A rubber composition for a tire comprising 100 parts by mass of a rubber component comprising diene rubber, and from 0.5 to 20 parts by mass of pellets comprising paper powder and starch and having water content of 5 mass % or more.
A method for manufacturing a tire, comprising:
- a nonproductive mixing step of adding a filler to a rubber component comprising diene rubber, followed by mixing to prepare a nonproductive rubber mixture,
- a productive mixing step of adding pellets to the nonproductive rubber mixture together with a vulcanizing agent, followed by mixing to prepare a rubber composition, wherein the pellets comprise paper powder and starch and have water content of 5 mass % or more and there is 0.5 to 20 parts by mass of the pellets based on 100 parts by mass of the rubber component, and wherein the mixing temperature in the productive mixing step is 120° C. or lower,
- producing an unvulcanized tire using the rubber composition obtained, and
- vulcanization molding the unvulcanized tire.
Dependencies are inferred from the claim text.