Method for producing rubber composition and method for producing tire
A technology of rubber composition and manufacturing method, which is applied to special tires, tire parts, transportation and packaging, etc., and can solve the problems of poor mixing efficiency of compounding agents, poor biting performance of intermeshing closed mixers, etc.
Pending Publication Date: 2022-06-21
TOYO TIRE & RUBBER CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0005] However, the biting property (噛み込み) of the meshing type closed mixer is generally worse than
That is, the compounding efficiency of the intermeshing closed mixer is generally poor
Method used
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Abstract
The invention relates to a method for producing a rubber composition and a method for producing a tire. The purpose of the present invention is to provide a method for producing a rubber composition that can be kneaded with a high filling coefficient (for example, substantially the same degree as the filling coefficient employed by a tangential hermetic kneader) when a meshing hermetic kneader is used. This method for producing a rubber composition comprises a step for kneading at least a rubber, silica, and a silane coupling agent in a mesh-type hermetic kneader (1), and comprises a first step for kneading along with an increase in the kneading temperature at the beginning of the step, and a second step for kneading along with an increase in the kneading temperature at the beginning of the first step. The kneading is performed in a state in which the ram (7) is maintained at a first position above the lowermost position within the movable range of the ram (7), and the effective volume when the ram (7) is at the first position in the first stage is 105-120% relative to 100% of the effective volume when the ram (7) is at the lowermost position.
Description
technical field [0001] The present invention relates to a method for producing a rubber composition and a method for producing a tire. Background technique [0002] In order to prepare a rubber composition in which silica is dispersed, a method of kneading silica, a silane coupling agent, rubber, etc. using a tangential type closed mixer or an intermeshing type closed type mixer is known. . The tangential closed type kneader is designed so that the rotation tracks of the two rotors do not overlap, and the shearing action acts between the rotor and the wall surface of the casing. On the other hand, the intermeshing type closed kneader is designed so that the rotation trajectories of the two rotors overlap, and the shearing action acts not only between the rotors and the wall surface of the housing, but also between the rotors. [0003] During kneading, the temperature of the kneading raw material (Japanese original: 勼り生地), that is, the kneading temperature will rise due to ...
Claims
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IPC IPC(8): B29B7/18B29B7/22B29B7/24B29B7/26B29B7/28C08L9/06C08L7/00C08K3/36C08K5/548
CPCB29B7/183B29B7/22B29B7/24B29B7/26B29B7/28C08L9/06C08L7/00C08K3/36C08K5/548B29B7/7495B29B7/283B29B7/286B29B7/823B60C1/0016C08J3/203C08J2309/06C08J2409/06C08K3/04C08L2203/30B29B7/48C08K5/58
Inventor 镰田晋作
Owner TOYO TIRE & RUBBER CO LTD