Method for producing polymer sheet for inner liner and method for producing pneumatic tire

A polymer and airtight layer technology, applied in special tires, tire parts, chemical instruments and methods, etc., can solve problems such as complex steps, and achieve the effect of preventing adhesion

Inactive Publication Date: 2011-04-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the technical solution of Japanese Unexamined Patent Publication No. 09-165469, there is a problem that a rubber adhesive composed of a rubber composition must be bonded after the nylon film is subjected to RFL treatment, thereby forming a nylon film layer, resulting in complicated step

Method used

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  • Method for producing polymer sheet for inner liner and method for producing pneumatic tire
  • Method for producing polymer sheet for inner liner and method for producing pneumatic tire
  • Method for producing polymer sheet for inner liner and method for producing pneumatic tire

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Embodiment 1 to 10

[0109]

[0110] According to each formulation shown in Table 1, a twin-screw extruder (screw diameter: φ50mm, L / D: 30, barrel temperature: 220°C) was charged with polymer mixture components and fillers and formed into pellets, and then unvulcanized The polymer sheet was produced by a T-die extruder (screw diameter: φ80 mm, L / D: 50, die width: 500 mm, barrel temperature: 220° C., film thickness: 0.3 mm).

[0111] One surface of the unvulcanized polymer sheet was coated and / or sprayed with a release agent under the conditions shown in Table 1, thereby obtaining a polymer sheet for an inner liner. The mold release agent used was obtained by the following method.

[0112] The water-soluble paint was prepared by thoroughly mixing a mixed liquid containing: 45% by mass mica (D1000, manufactured by Nippon Talc Co., Ltd.) under stirring, passing the liquid through a paint roller and filtering the liquid through an 80 mesh filter ), 15 mass % emulsified silicone oil (Wacker E2891, m...

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Abstract

The present invention provides a polymer sheet for an inner liner and a method for producing a pneumatic tire, which do not cause an air-in phenomenon between an inner liner and an insulation rubber or a carcass rubber in the vulcanization step, and also can prevent adhesion between the inner liner and a bladder. The method for producing a polymer sheet for an inner liner includes the steps of preparing an unvulcanized polymer sheet made of a polymer mixture containing 99 to 60% by mass of a styrene-isobutylene-styrene triblock copolymer, and 1 to 40% by mass of a polyamide-based polymer containing polyamide in the molecular chain and having a Shore D hardness of 70 or less, and at least one of the steps of coating one surface of the unvulcanized polymer sheet with a water-soluble paint 2 to 5 times, and coating with a mold-releasing rubber in a thickness of 0.001 mm to 0.1 mm.f.

Description

[0001] This application is based on Japanese Patent Application No. 2009-209633 filed with the Japan Patent Office on September 10, 2009, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a method of manufacturing a polymer sheet for an inner liner; and a method of manufacturing a pneumatic tire. Background technique [0003] Recently, due to the strong social demand for fuel-efficient vehicles, attempts have been made to reduce tire weight. Attempts have also been made to reduce the weight of the inner liner in the tire member, which is located inside the tire and has a function of improving air permeability resistance by reducing the amount of air leakage (air penetration amount) from the inside of the pneumatic tire to the outside. [0004] In the rubber composition for an inner liner, tire air permeability resistance is improved by using a butyl-based rubber containing 70 to 100% by mass of butyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/08B32B33/00C08L53/00C08L77/00B29D30/08
CPCB60C1/0008B29D2030/0682B29D30/0681C08L53/00
Inventor 杉本睦树
Owner SUMITOMO RUBBER IND LTD
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