Fuel hose

A fuel and hose technology, which is applied in the direction of hoses, pipes, pipes/pipe joints/fittings, etc., can solve the problems of increasing the thickness of the fluororesin layer, low permeability, expensive hoses, etc., and achieve improved chemical resistance , the effect of improving softness and improving affinity

Inactive Publication Date: 2013-03-27
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventionally, fluororesin has been used in fuel hoses, but when more stringent low fuel permeability (fuel barrier properties) is required, the thickness of the fluororesin layer has to be increased, so there is a problem that the hose becomes expensive

Method used

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  • Fuel hose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Preparation of resin composition

[0069] PA6 (component A) and PA9T (component B) were blended in the ratio shown in Table 1 below, and kneaded at 300°C for 1 to 2 minutes using a twin-screw kneader (manufactured by JSW). Next, mix the elastomer (i) (component C) in the ratio shown in the table, and mix at 300°C for 2 to 3 minutes using a twin-screw kneader (manufactured by JSW Co., Ltd., TEX-α) to prepare a resin composition. things.

[0070] Production of hose

[0071] The above-mentioned resin composition was extrusion-molded into a tube shape, and a single-layer hose (inner diameter 12 mm) composed of only a tube-shaped resin layer (thickness 1.0 mm) was produced.

Embodiment 2～8， comparative example 1～3

[0073] Except having changed the compounding ratio of each component into the ratio shown in following Table 1, it carried out similarly to Example 1, and produced the resin composition. And except having used this resin composition, it carried out similarly to Example 1, and produced the hose.

[0074] [Table 1] (parts by weight)

[0075]

[0076] The hoses of Examples and Comparative Examples obtained in this way were evaluated for each property based on the following criteria. The results are shown together in Table 1 above.

[0077] compatible state

[0078] Regarding the resin composition of each hose, the compatibility state of the aliphatic polyamide (component A) and the semiaromatic polyamide (component B) was confirmed. That is, the resin composition was thermally analyzed using DSC (manufactured by Shimadzu Corporation, DSC-60). The case where the endothermic peak attributable to the melting point was a single peak was evaluated as ◯ (compatible), and the c...

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Abstract

The invention provides a fuel hose advantaged by fuel low permeation, chemical reagent durability, flexibility, and excellent continuous process. The invention is a fuel hose provided with a tubular resin layer in a contact with fuel, and the resin layer is formed by a resin composition comprising (A)-(C) components, wherein a weight mixing ratio of an (A) component and a (B) component is that the (A) component / the (B) component=95 / 5-60 / 40, and the (A) component and the (B) component are in a compatible state, (A) aliphatic polyamide, (B) semi-aromatic polyamide, and (C) an elastomer.

Description

technical field [0001] The present invention relates to a fuel hose, and more specifically, to a fuel hose for automobiles used for conveying hoses for automobile fuels such as gasoline, mixed alcohol gasoline, diesel fuel, compressed natural gas (CNG), and liquefied petroleum gas (LPG), etc. . Background technique [0002] In recent years, restrictions on evaporation of fuel gas surrounding automobiles have become severe, and various low-permeability fuel hoses that cope with the restrictions have been studied. Conventionally, fluororesins have been used in fuel hoses. However, when more stringent low fuel permeability (fuel barrier properties) is required, the thickness of the fluororesin layer has to be increased, which has the disadvantage of increasing the cost of the hose. Therefore, as resins that are cheaper than fluororesins and have excellent low fuel permeability, aliphatic polyamides such as polyamide 6 (PA6) and aromatic polyamides such as polyamide 9T (PA9T) h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/04C08L77/00C08L77/02C08L77/06C08L23/08C08L23/26
Inventor 小柳津直树片山和孝水谷幸治
Owner SUMITOMO RIKO CO LTD
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