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Refrigerant transporting hose

A technology for conveying hoses and refrigerants, applied in the directions of hoses, pipes, pipes/pipe joints/fittings, etc., can solve the problems of high rigidity and poor flexibility of semi-aromatic polyamide, and achieve excellent flexibility and improved flexibility. , Excellent acid resistance

Inactive Publication Date: 2013-07-31
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, semi-aromatic polyamide has the difficulty of high rigidity and poor flexibility

Method used

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  • Refrigerant transporting hose
  • Refrigerant transporting hose
  • Refrigerant transporting hose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] (Preparation of resin composition)

[0106] PA6 (component A) and PA9T (component B) were mixed at 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, the elastomer (i) (component C) was blended in the ratio shown in the same table, and melt-mixed at 300° C. for 2 to 3 minutes using a twin-screw kneader (manufactured by JSW Co., Ltd.) to prepare a resin composition. .

[0107] (Preparation of butyl rubber composition)

[0108] 100 parts by weight of chlorinated butyl rubber (Cl-IIR) (manufactured by JSR Corporation, butyl HT1066), 1 part by weight of stearic acid (manufactured by Kao Co., Ltd., ビーズズステアリニンタスわら), 20 parts by weight of FEF grade Carbon black (manufactured by Tokai Carbon Co., Ltd., SEAST SO), 100 parts by weight of talc (manufactured by Nippon Talc Co., Ltd., MICRO ACE P-2), 10 parts by weight of naphthenic oil (Idemitsu Kosan Co., Ltd., Diana process NM-280), 3 parts by weigh...

Embodiment 2～9、 comparative example 1～3

[0114] Except having changed the compounding ratio of each component into the ratio as described 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.

[0115] [Table 1]

[0116]

[0117] With regard to the hoses of Examples and Comparative Examples obtained in this way, evaluation of each property was performed according to the following criteria. The results are shown together in Table 1 above.

[0118] [compatibility status]

[0119] 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 thermal analysis of the resin composition was performed using DSC (manufactured by Shimadzu Corporation, DSC-60). The endothermic peak derived from the melting point was evaluated as ◯ (compatible), and the ...

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Abstract

Provided is a refrigerant transporting hose which has excellently low permeability to refrigerants, excellent acid resistance and excellent flexibility. A refrigerant transporting hose having a tubular resin layer (1) that comes into contact with a refrigerant. The resin layer (1) is formed of a resin composition that contains the components (A)-(C) described below, with the mixing weight ratio of the component (A) to the component (B), namely component (A) / component (B) being from 95 / 5 to 60 / 40. In this connection, the component (A) and the component (B) are in a compatible state. (A) an aliphatic polyamide (B) a semiaromatic polyamide (C) an elastomer

Description

technical field [0001] The present invention relates to refrigerant conveying hoses, in detail, to conveying refrigerants such as carbon dioxide, freon (R12), substitute freon (single refrigerant R-134a or mixed refrigerant Fluid H, etc.), propane, air conditioning hoses or radiators Refrigerant delivery hoses for automobiles such as air compressor hoses. Background technique [0002] In general, fluorine-based refrigerants such as freon (R12) and alternative freon (R-134a, etc.) are used for refrigerant delivery hoses that can be used as piping hoses in engine compartments of automobiles. In recent years, with stricter regulations on transpiration of ozone-depleting gases, the refrigerant permeability requirements for automobile refrigerant hoses have become more stringent. Therefore, the resin layer (innermost layer) of the refrigerant delivery hose that contacts the refrigerant ) uses a highly crystalline resin material such as polyamide. [0003] However, it is known t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L23/08C08L23/26F16L11/08
CPCC08L77/00C08L23/08C08L2205/02F16L11/085C08L23/26C08L77/06C08L23/0815C08L23/16C08L51/06
Inventor 小柳津直树片山和孝
Owner SUMITOMO RIKO CO LTD