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Method for producing pneumatic tire

A manufacturing method and technology of pneumatic tires, applied in the direction of pneumatic tires, special tires, tire parts, etc., can solve problems such as air intake, achieve thin thickness, good air permeability resistance, and prevent adhesion

Inactive Publication Date: 2014-01-15
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the vulcanized tire is taken out from the mold, the inner liner bonded to the air bag is attached to the air bag side, and there is a problem that air intake occurs between the inner liner and the insulation layer or the carcass.

Method used

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  • Method for producing pneumatic tire
  • Method for producing pneumatic tire
  • Method for producing pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～5

[0061]

[0062] As the SIBS, "Sibstar SIBSTAR 102T" (Styrene-isobutylene-styrene triblock copolymer, weight average molecular weight 100,000, styrene unit content 25% by mass, Shore A hardness 25) manufactured by Kaneka Co., Ltd. was prepared.

[0063] As the epoxidized SBS, "Epofrend A1020" (epoxidized styrene-butadiene-styrene triblock copolymer, weight average molecular weight 100,000, epoxy equivalent 500) manufactured by Daicel Chemical Industry Co., Ltd. was prepared.

[0064] The above-mentioned SIBS and epoxidized SBS are respectively passed through a twin-screw extruder (screw diameter: L / D: 30, barrel temperature: 220°C) granulation. The granules obtained are used in a T-die extruder (screw diameter: L / D: 50, die width: 500 mm, barrel temperature: 220° C.) were co-extruded as the first layer and the second layer, and polymer laminates having thicknesses shown in Table 2 were produced.

[0065] In addition, in Comparative Example 1, 90 parts by mass of butyl chl...

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Abstract

This method for producing a pneumatic tire (1) contains: a step for preparing a polymer laminate comprising a first layer, which has a thickness of 0.05-0.6 mm and comprises a styrene-isobutylene-styrene triblock copolymer, and a second layer, which has a thickness of 0.01-0.3 mm and comprises an epoxidized styrene-butadiene-styrene triblock copolymer; a step for forming a green tire wherein the polymer laminate has been pasted to the inside of a tire as an inner liner (9); a step for disposing the green tire in a die and vulcanizing the tire while pressurizing by means of a bladder; and a step for cooling the vulcanized tire for 10-300 seconds at 50-120 DEG C.

Description

technical field [0001] The present invention relates to a method of manufacturing a pneumatic tire, and in particular, to a method of manufacturing a pneumatic tire using a polymer laminate for an inner liner. Background technique [0002] In recent years, weight reduction of tires has been pursued based on strong social demand for lower fuel consumption of vehicles. Among tire components, weight reduction is also required for an inner liner arranged inside the radial direction of the tire in order to reduce the amount of air leakage from the inside of the pneumatic tire to the outside. [0003] Currently, as a rubber composition for an inner liner, a butyl-based rubber containing 70 to 100% by mass of butyl rubber and 30 to 0% by mass of natural rubber is used to improve the air permeability resistance of the tire. In addition, butyl-based rubber contains about 1% by mass of isoprene in addition to butene, and it is combined with sulfur, vulcanization accelerator, and zinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/02B29C35/02B29D30/08B60C5/14B29L30/00
CPCB60C1/0008B29D30/0681C08L53/02B29D2030/0682B60C2005/145C08L53/025B29C33/02B29C35/02B29D30/08B60C5/14
Inventor 上坂宪市杉本睦树
Owner SUMITOMO RUBBER IND LTD