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Multilayer tube

一种聚酰胺、脂肪族聚酰胺的技术，应用在管子、软管、涂层等方向，能够解决成本高、比重高等问题，达到耐溶出性优异的效果

Active Publication Date: 2020-08-28
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while avoiding the use of halogen-containing materials in terms of environmental protection, there are problems of high specific gravity and high cost, and the development of piping systems that use halogen-free materials, have excellent barrier properties to chemical solutions, and are resistant to various chemical solutions is being sought

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0262] Using the aforementioned aliphatic polyamide composition (A-1) and modified polypropylene (B-1), utilize Plabor (manufactured by Plastic Engineering Research Institute Co., Ltd.) double-layer pipe forming machine to make (A-1) The extrusion temperature of 270° C. and (B-1) were melted at an extrusion temperature of 220° C., respectively, and the discharged molten resins were combined by a merger to form a laminated tubular body. Then, it is cooled and removed by a sizing die for size control, and (a) layer (outermost layer) formed from (A-1) and (b) layer (outermost layer) formed from (B-1) are produced. In the case of the inner layer), a laminated tube having a layer configuration of (a) / (b)=0.75 / 0.25 mm, an inner diameter of 6.0 mm, and an outer diameter of 8.0 mm was obtained. Table 1 shows the measurement results of physical properties of the laminated tube.

Embodiment 2

[0264] In Example 1, except that the thickness of the layer was changed, by the same method as in Example 1, a layer composition (a) / (b)=0.65 / 0.35 mm, an inner diameter of 6.0 mm, and an outer diameter of 8.0 mm was obtained. Laminated tubes. Table 1 shows the measurement results of physical properties of the laminated tube.

Embodiment 3

[0266] In Example 1, except that the layer thickness was changed, by the same method as in Example 1, a layer composition (a) / (b)=0.80 / 0.20mm, an inner diameter of 6.0mm, and an outer diameter of 8.0mm was obtained. Laminated tubes. Table 1 shows the measurement results of physical properties of the laminated tube.

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Abstract

The present invention provides a multilayer tube having excellent low temperature impact resistance, breakage pressure strength at high temperatures, flexibility, dimensional stability, and elution resistance of low molecular weight substances and ion components. The multilayer tube according to the present invention has: a layer comprising an aliphatic polyamide composition containing an elastomer polymer that contains a constituent unit derived from an unsaturated compound having a carboxyl group and / or an acid anhydride group and an aliphatic polyamide having a ratio of a number of methylene groups to a number of amide groups in a prescribed range, the aliphatic polyamide composition having a flexural modulus of elasticity that is within a specific range by containing, as necessary, a plasticizer having a specific structure; and a layer containing a modified polyolefin having a specific melting point or higher. The thickness of the layer comprising the aliphatic polyamide composition is a specific ratio or higher with respect to the total wall thickness of the tube.

Description

technical field [0001] The present invention relates to laminated tubes. Background technique [0002] Various pressure pipes such as oil pressure pipes and water pressure pipes, vacuum pipes, fuel pipes used in automobiles, brake pipes, coolant hoses, air-conditioning pipes, SCR (diesel engine exhaust removal device) pipes, control pipes, etc. A large number of hoses / tubes are used for cable glands and the like. Chemical solutions such as coolants (alcohol and water), refrigerants, oils, urea solutions, etc. are transported in these hoses / pipes. For various hoses / pipes etc. used in the automotive industry field, high breaking pressure strength at high temperature, long-term heat resistance, chemical resistance, water vapor and / or chemical solution barrier properties, High performance such as flexibility. [0003] In particular, the circulating fluid is used for coolant (LLC) mainly composed of ethylene glycol to prevent freezing in winter, urea solution enclosed as a cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/04B32B1/08B32B27/22B32B27/32
CPCB32B1/08B32B27/22B32B27/32F16L11/04B32B27/08B32B27/281B32B27/30B32B27/34B32B27/38B32B27/42B32B2250/02B32B2250/03B32B2250/24B32B2270/00B32B2307/30B32B2307/308B32B2307/546B32B2307/554B32B2307/714B32B2307/7265B32B2307/732B32B2597/00B32B2605/00B32B2479/00B32B2457/00B32B2419/00B32B2535/00B32B2307/51B32B2307/54B32B2307/558C08L77/02C08G69/14C08G69/26C08L77/06C09D177/02C09D177/06C08L23/0815C08L2207/20C08L67/02C08K2003/265C08L51/06B32B2323/10B32B2377/00
Inventor 坪井一俊佐佐木亮辅福田竜中村孝治
Owner UBE IND LTD
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