Ply, clinch and tread formed using specified rubber composition, and pneumatic tire utilizing them

A technology of rubber composition and lap joint, which is applied to special tires, tire treads/tread patterns, tire parts, etc., can solve the problem of not considering the performance of rubber composition, etc., and achieve improved mechanical strength and excellent processability , excellent durability and rolling resistance characteristics

Inactive Publication Date: 2010-03-24
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is related to the covering of steel cords, and does not take into account the rubber composition suitable for covering the cords made of materials other than steel and its required performance.

Method used

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  • Ply, clinch and tread formed using specified rubber composition, and pneumatic tire utilizing them
  • Ply, clinch and tread formed using specified rubber composition, and pneumatic tire utilizing them
  • Ply, clinch and tread formed using specified rubber composition, and pneumatic tire utilizing them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2 and comparative example 1～3

[0123] According to the formulation shown in Table 1, the formulation components other than sulfur and the vulcanization accelerator were kneaded at 150° C. for 5 minutes using a 1.7 L Banbury Kneader manufactured by Kobe Steel to obtain a kneaded product. The formulation amounts of sulfur and vulcanization accelerator shown in Table 1 were added thereto, and kneaded at 90° C. for 5 minutes using an open mill to prepare an unvulcanized rubber composition.

[0124] The unvulcanized rubber composition obtained above was extruded to produce an unvulcanized rubber sheet of a certain thickness. The unvulcanized rubber sheet was vulcanized at 150° C. for 30 minutes to produce a vulcanized rubber sheet with a certain thickness.

[0125] (Mooney Viscosity Index)

[0126] For the above-mentioned unvulcanized rubber composition, the Mooney viscosity at 130°C was measured according to JIS K6300, and according to the following formula,

[0127] Mooney viscosity index=(Mooney viscosity o...

Embodiment 3～5 and comparative example 4、5

[0149] According to the formula shown in Table 1, use a 1.7L Banbury mixer manufactured by Kobe Steel Works, fill the formula components except sulfur and vulcanization accelerator so that the filling rate is 58%, and mix with a rotating speed of 80rpm Refined for 3 minutes to reach 140°C. Finally, after adding the formula amounts of sulfur and vulcanization accelerator shown in Table 2 to the obtained kneaded product, using an open mill, kneaded at 80° C. for 5 minutes to obtain the unfinished product of the formula shown in each embodiment and comparative example. Vulcanized rubber composition.

[0150] (Mooney Viscosity Index)

[0151] According to JIS K6300, the Mooney viscosity of the unvulcanized rubber composition was measured at 130°C, and the Mooney viscosity of Comparative Example 1 was 100, according to the following calculation formula,

[0152] Mooney viscosity index=(Mooney viscosity of Comparative Example 1)÷(Mooney viscosity of each Example and each Comparati...

Embodiment 6、7 and comparative example 6、7

[0178] According to the formula shown in Table 3, use a 1.7L Banbury mixer made by Kobe Steel Works, fill the formula components except sulfur and vulcanization accelerator so that the filling rate is 58%, and mix with a rotating speed of 80rpm Refined for 3 minutes to reach 140°C. Add the formula amounts of sulfur and vulcanization accelerator shown in Table 3 to the obtained kneaded product, and knead at 80°C for 5 minutes using an open mill to obtain unvulcanized rubber compositions with the formulas shown in each example and comparative example. .

[0179] (Mooney Viscosity Index)

[0180] According to JIS K6300, the Mooney viscosity of the unvulcanized rubber composition was measured at 130°C, and the Mooney viscosity of Comparative Example 1 was 100, according to the following calculation formula,

[0181] Mooney viscosity index=(Mooney viscosity of Comparative Example 1)÷(Mooney viscosity of each Example and each Comparative Example)×100 represents an index. The larg...

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Abstract

The present invention provides a rubber composition that is used for forming a ply having superior processability upon preparation thereof, with a reduced hysteresis loss, a clinch that is capable of achieving both of good physical characteristics, such as rigidity, hardness and mechanical strength, and improvements in processability and a tread that has high rigidity with a small hysteresis loss and is superior in processability upon preparation thereof, while reducing the amount of use of materials derived from petroleum resources, and a pneumatic tire provided with the same. The ply, the clinch apex and the tread are made from a rubber composition that has 100 parts by mass of a rubber component composed of a natural rubber and / or a modified natural rubber, and 25 to 80 parts by mass of silica having a BET specific surface area of not more than 150 m<2> / g, and the pneumatic tire is provided with the same.

Description

technical field [0001] The present invention relates to component materials for pneumatic tires. Specifically, the present invention relates to a carcass, clinch, and tread formed from a specific rubber composition, and a pneumatic tire including them. Background technique [0002] In recent years, with the emphasis on environmental issues, the suppression of CO 2 Regulations on emissions have been strengthened. In addition, due to limited petroleum resources, the supply of raw materials derived from petroleum resources such as carbon black may be difficult in the future, and the price of petroleum is expected to soar as the supply decreases year by year. Therefore, it is required to replace the raw material derived from petroleum resources with the raw material of non-petroleum resources. [0003] Generally, more than half of the total weight of tires sold in the market is composed of raw materials from petroleum resources. For example, a typical passenger car tire cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00B60C1/00B60C11/00B60C15/06C08K3/04C08K3/36C08L15/00
CPCC08L15/00C08K3/36B60C11/005B60C2015/0614C08L7/00C08K3/04C08C19/06B60C1/0016C08L2666/08B60C15/06
Inventor 三木孝之池田启二
Owner SUMITOMO RUBBER IND LTD
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