Production method for unvulcanized rubber member and tire
First Claim
1. A method of producing an uncured rubber member, characterized in that a rubber composition A of a compounding system excluding a vulcanizing agent and a rubber composition B of a compounding system excluding a vulcanization accelerator are produced separately, and the rubber composition A and the rubber composition B are shaped into given forms through a shaping machine, respectively, and wound on a rotating support.
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Accused Products
Abstract
A method of producing an uncured rubber member by separately producing a rubber composition A of a compounding system excluding a vulcanizing agent and a rubber composition B of a compounding system excluding a vulcanization accelerator and shaping the rubber compositions A and B into given forms through a shaping machine and winding on a rotating support does not cause the scorching at the shaping step and is high in the shaping efficiency. Also, the durability and the internal pressure holding property at a run-flat state are simultaneously established in a tire provided with an innerliner in which a rubber component for the innerliner contains at least 10% by mass of diene rubber in a region corresponding to a tire side portion and a ratio of diene rubber in a region corresponding to a tire tread portion is made lower than that in a side portion corresponding region.
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Citations
18 Claims
- 1. A method of producing an uncured rubber member, characterized in that a rubber composition A of a compounding system excluding a vulcanizing agent and a rubber composition B of a compounding system excluding a vulcanization accelerator are produced separately, and the rubber composition A and the rubber composition B are shaped into given forms through a shaping machine, respectively, and wound on a rotating support.
- 8. An apparatus for producing an uncured rubber member, comprising a rotating support and plural extruders connecting to the support.
- 10. A tire provided with an innerliner, characterized in that a rubber component for the innerliner contains at least 10% by mass of diene rubber in a region corresponding to a tire side portion and a ratio of diene rubber in a region corresponding to a tire tread portion is made lower than that in a side portion corresponding region.
- 16. A method of producing a tire provided with an innerliner by separately taking out rubber compositions from plural storage tanks containing different rubber compositions and kneading and extruding through an extruder and winding the resulting extrudate on a rotating support to form an innerliner layer, characterized in that take-out amounts of the rubber compositions are changed so that a rubber component for the innerliner contains at least 10% by mass of diene rubber in a region corresponding to a tire side portion and a ratio of diene rubber in a region corresponding to a tire tread portion is made lower than that in a side portion corresponding region.
Specification