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Method for producing hose with protector layer

A technology with a protective layer and a protective layer, which is applied in the direction of hoses, pipes, coatings, etc., can solve the problems of easy scorching and poor storage stability, and achieve the effects of shortened manufacturing time, good dispersibility, and operability

Inactive Publication Date: 2013-06-05
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, if the above-mentioned highly active vulcanization accelerator is used, although rapid vulcanization can be achieved, the reverse side will easily scorch (complete vulcanization phenomenon), and the vulcanization reaction will proceed completely even if it is left at room temperature, so storage very poor stability

Method used

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  • Method for producing hose with protector layer
  • Method for producing hose with protector layer
  • Method for producing hose with protector layer

Examples

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Embodiment 1

[0114] Copolymer of ethylene, hexafluoropropylene, and tetrafluoroethylene (EFEP) (manufactured by DAIKIN INDUSTRIES, Ltd., NEOFLON RP5000) and polyamide 12 (PA12) (manufactured by ARKEMA CORPORATION, Rilsan AESN NOIR P20TL, melting point 170°C) pellets A resin hose having an inner layer (polyamide-based resin layer) on the outer peripheral surface of the innermost layer (fluororesin layer) was produced by coextrusion molding into a hose shape. Separately, the above-mentioned first rubber material and second rubber material were prepared and mixed in a screw mixer (manufactured by Mitsuha Seisakusho, 60G-12D-HB) to prepare a rubber composition for forming a protective layer. The temperature during mixing is adjusted at 80~105°C. Next, the rubber composition was continuously extruded on the outer periphery of the inner layer (polyamide-based resin layer) to produce an unvulcanized hose, which was continuously supplied to a hot air furnace, and the unvulcanized rubber was vulcan...

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Abstract

The purpose of the present invention is to provide a method for producing a hose with a protector layer that has excellent storage stability and increased vulcanization rate. A method for producing a hose with a protector layer, said hose having a protector layer (2) that is formed on the outer circumference of a tubular polyamide resin layer (1), which comprises: a step wherein a first rubber material that contains the components (A)-(C) described below and a second rubber material that contains the components (a) and (b) described below but does not substantially contain a sulfur vulcanizing agent are separately prepared, and a rubber composition for forming a protector layer is obtained by mixing these rubber materials in a mixing device; and a step wherein the protector layer (2) is formed by continuously extrusion-molding the rubber composition on the outer circumference of the polyamide resin layer (1), which has been formed in advance, and then continuously vulcanizing the unvulcanized rubber. (A) an ethylene-propylene rubber (B) a sulfur vulcanizing agent (C) a thiuram vulcanization accelerator having a melting point of 66-105 DEG C (a) an ethylene-propylene rubber (b) a vulcanization accelerator having a melting point of 120 DEG C or higher.

Description

technical field [0001] The present invention relates to a method for producing a hose with a protective layer in which a protective layer is formed on the outer periphery of a tubular polyamide-based resin layer. Continuous process for the protection of hoses. Background technique [0002] Generally, a fuel hose is configured by covering the outer periphery of a resin layer made of fluororesin or polyamide resin with a protective layer made of a rubber composition. The reason why the protective layer is formed in this way is to prevent a fire or the like from occurring when the resin layer of the fuel hose is damaged during a vehicle collision and fuel leaks out. Conventionally, in such a protective layer of a fuel hose, a highly active vulcanization accelerator such as a thiuram system has been used in order to accelerate vulcanization (shorten vulcanization time) (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08B29C47/02B29D23/00B32B25/08B32B27/32C08K5/36C08L23/16F16K11/04B29C48/09B29C48/151B29C48/21
CPCB29C47/021B32B2250/02B32B2597/00B32B25/14B32B27/304B32B2270/00B29C47/0023B29C35/0222B32B2305/72B32B27/34B32B27/322B32B27/08F16L1/00F16L55/1616B32B1/08B32B25/08B32B2250/03B29C35/0288C08L23/0815B29D23/001F16L11/06F16L11/125C08L23/16B32B2250/24B29C47/065C08L2205/02C08K5/0025C08K5/40C08K3/06C08K5/39C08K5/47C08K13/02B29C48/09B29C48/151B29C48/21
Inventor 小柳津直树片山和孝
Owner SUMITOMO RIKO CO LTD
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