Pneumatic tire and process for manufacturing the same

一种充气轮胎、制造方法的技术，应用在充气轮胎、轮胎零部件、没有单独的充气垫等方向，能够解决阻气性差等问题，达到提高密合性的效果

Inactive Publication Date: 2010-03-17
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when obtaining a sheet-like film from a cylindrical film, it is necessary to cut the cylindrical film to an appropriate size, and there is a disadvantage that scraps are generated.
In addition, in the case of using a T-die molding machine to produce a sheet film, although the same material supply device as the conventional one can be used, the degree of freedom in the orientation control of the polymer chain is lower than that of a cylindrical molded product, Even with materials of the same composition, gas barrier properties are inferior to cylindrical molded products.

Method used

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  • Pneumatic tire and process for manufacturing the same
  • Pneumatic tire and process for manufacturing the same
  • Pneumatic tire and process for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A cylinder with a circumference of 900 mm and a thickness of 20 μm (the outermost layer containing the adhesive: 5 μm, a film of a thermoplastic elastomer composition: 15 μm) was produced at a pull-out speed of 10 mm / min using a double-layer cylinder molding device. The molded product, followed by flattening the cylindrical molded product with nip rolls, yields a sheet-like laminate. An unvulcanized rubber composition sheet having a thickness of 0.2 mm was bonded to the sheet-like laminate from the vertical direction to produce a rubber laminate. Using this rubber laminate as an inner liner material, an unvulcanized tire is molded by a known method, and the unvulcanized tire is vulcanized. In this case, since the same material supply device as in the case of using an existing inner liner material formed of a rubber sheet can be used, and the sheet-like laminate does not require a cutting process for adjusting the lateral dimension, it can be achieved by Easy building p...

Embodiment 2

[0084] A cylinder with a circumference of 900 mm and a thickness of 20 μm (the outermost layer containing the adhesive: 5 μm, a film of a thermoplastic elastomer composition: 15 μm) was produced at a pull-out speed of 10 mm / min using a double-layer cylinder molding device. The molded product, followed by flattening the cylindrical molded product with nip rolls, yields a sheet-like laminate. In addition, in the above-mentioned cylindrical molding, a liquid containing an adhesive is sprayed on the inner side of the film to form the innermost layer on the inner side of the film. An unvulcanized rubber composition sheet having a thickness of 0.2 mm was bonded to the sheet-like laminate from the vertical direction to produce a rubber laminate. Using this rubber laminate as an inner liner material, an unvulcanized tire is molded by a known method, and the unvulcanized tire is vulcanized. In this case, since the same material supply device as in the case of using an existing inner l...

Embodiment 3

[0086] Using a double-layer cylinder molding device, a cylindrical molding with a circumference of 900 mm and a thickness of 20 μm (the outermost layer containing the adhesive: 5 μm, and a thermoplastic resin film: 15 μm) was produced at a pulling speed of 10 mm / min. Next, a sheet-like laminate is obtained by flattening the cylindrical molding with nip rolls. In addition, in the above-mentioned cylindrical molding, a liquid containing an adhesive is sprayed on the inner side of the film to form the innermost layer on the inner side of the film. An unvulcanized rubber composition sheet having a thickness of 0.2 mm was bonded to the sheet-like laminate from the vertical direction to produce a rubber laminate. Using this rubber laminate as an inner liner material, an unvulcanized tire is molded by a known method, and the unvulcanized tire is vulcanized. In this case, since the same material supply device as in the case of using an existing inner liner material formed of a rubber...

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Abstract

A pneumatic tire and process for manufacturing the same that realize, in the use of a film of thermoplastic resin or thermoplastic elastomer composition composed of a blend of thermoplastic resin andelastomer as an air permeation preventive layer, formation of an air permeation preventive layer excelling in gas barrier performance and molding of a tire through simple molding operation without thegeneration of any unnecessary scraps. In the pneumatic tire, a cylindrical molding of a film of thermoplastic resin or thermoplastic elastomer composition composed of a blend of thermoplastic resin and elastomer is crushed into a sheet laminate, and the sheet laminate is used as an air permeation preventive layer. In the manufacturing operation, the sheet laminate is wrapped around a molding drumto thereby obtain an unvulcanized tire having the sheet laminate as an air permeation preventive layer, and the unvulcanized tire is vulcanized.

Description

technical field [0001] The present invention relates to a pneumatic tire in which a film of a thermoplastic resin or a thermoplastic elastomer composition in which an elastomer is mixed with a thermoplastic resin is used as an air permeation barrier layer, and a method for producing the same. ply, and a pneumatic tire capable of forming a tire through a simple molding process without generating excess scrap and a manufacturing method thereof. Background technique [0002] In recent years, it has been proposed to dispose a film of a thermoplastic resin or a thermoplastic elastomer composition in which an elastomer is mixed with a thermoplastic resin as an air permeation barrier layer on the inner surface of the tire. In particular, it has been proposed to form a film into a cylindrical shape, and to use the cylindrical film as an intermediate material in a tire building process (for example, refer to Patent Document 1 and Patent Document 2). [0003] A film of a thermoplasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/14B29D30/30
CPCB29D2030/0682B29D30/3007B29D30/0681B29D30/20B60C5/14B60C2005/145B60C2005/147
Inventor 柴田宽和师冈直之挟间浩久檀上正通龟田宪史桥村嘉章
Owner THE YOKOHAMA RUBBER CO LTD
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