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Multilayered resin tube-shaped body

一种管状体、树脂的技术，应用在合成树脂层状产品、软管、管子等方向，能够解决润滑性差、重量增加、成本上升等问题，达到充分耐热性能和强耐压强度、提高重复疲劳性的效果

Active Publication Date: 2013-03-06
SANOH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The EPDM of this protector is thermosetting, so it has excellent heat resistance, but because it is rubber, it has poor lubricity with the surface of the resin tubular body when the protector is installed, so it needs to be formed to be installed between the protector and the resin tubular body. The structure of the gap requires a complicated process of coating the surface of the resin tubular body with a lubricant such as silicon when mounting.
In addition, there are problems of increased weight and cost due to the installation of the above-mentioned protective body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0043] It is a multi-layer resin tubular body with an outer diameter of 8 mm and an inner diameter of 6 mm. The outer layer (outermost layer) (2) is formed of PA612 to a thickness of 0.8 mm, and the inner layer (3-1) is formed of PA9T adjacent to the outer layer. The thickness is 0.2 mm, and the multi-layer resin tubular body (1) is formed by extrusion molding.

Embodiment 2）

[0045] The outer diameter and inner diameter are the same as in Example 1, the outer layer (outermost layer) (2) is formed of PA612 to a thickness of 0.7 mm, and the inner layer-1 (3-1) is formed of PA9T adjacent to the outer layer The inner layer-2 (3-2) is made of ETFE to have a thickness of 0.2mm, and the inner layer-2 (3-2) is formed to a thickness of 0.1mm, and a multilayer resin tubular body (1) is formed by extrusion molding.

Embodiment 3）

[0047] The outer diameter and inner diameter are the same as in Example 1, the outer layer (outermost layer) (2) is formed of PA612 to a thickness of 0.7mm, and the inner layer-1 (3-1) is formed of PA6T adjacent to the outer layer The thickness is 0.3 mm, and the multilayer resin tubular body (1) is formed by extrusion molding.

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Abstract

Provided is an economical multilayered resin tube-shaped body that can be safely used in a high-temperature environment such as an engine compartment. A multilayered resin tube-shaped body (1) having excellent heat resistance is obtained by forming an outer layer (2) from a thermoplastic resin having a melting point of 190-300 C and forming an inner layer (3) from a thermoplastic resin having a melting point of 150-300 C and low liquid or gas permeability. The thermoplastic resin that forms the outer layer (2) is preferably a resin having a hoop stress of 10 MPa or greater in a 120 C atmosphere. Furthermore, the thermoplastic resin that forms the inner layer (3) is preferably a resin having a gasoline permeability of 1.0 g / m2day or less.

Description

technical field [0001] The present invention relates to a resin tubular body formed in multiple layers, and particularly relates to a multilayer resin tubular body with improved heat resistance, which is used for piping components such as fuel pipes of automobiles. Background technique [0002] Conventionally, metal tubular bodies have been used as fuel pipes for automobiles. In order to enhance the corrosion resistance and chemical resistance of the metal tubular body, its surface is coated with multiple layers of resin. [0003] However, in recent years, for tubular bodies for fuel piping, metal tubular bodies are used and resin tubular bodies are also used. [0004] Unlike the metal tubular body, the resin tubular body has various advantages such as no rust, light weight, easy processing, and high degree of freedom in design. Therefore, the resin tubular body has great advantages in the field of automobiles requiring low fuel consumption and light weight. [0005] On t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08B32B27/00B32B27/34B60K15/01F16L11/12
CPCB32B27/304F16L11/12B32B27/306F16L2011/047B32B1/08B32B2250/03F16L11/04B32B27/34F16L9/123B32B2250/04B32B27/322B32B27/36B32B2250/02B32B2250/24B32B27/08B32B2307/308F16L9/12B32B2307/7265B32B27/286Y10T428/139Y10T428/1393
Inventor 中山广三
Owner SANOH IND CO LTD
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