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High-barrier nylon pipeline for automobiles and preparation method thereof

A high-barrier, nylon tube technology, applied in the direction of hoses, pipes, mechanical equipment, etc., can solve the problems that cannot meet the chemical corrosion performance of automobile fuel pipelines, low fuel permeability, etc., and achieve excellent dimensional stability and high resistance , Excellent fuel barrier performance and chemical resistance

Active Publication Date: 2016-01-06
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The national 863 plan clearly proposes the use of methanol as an alternative energy source for gasoline. Now many automobile factories are launching methanol-fueled vehicles, but the National V standard follows the introduction of the Euro V standard, and the fuel penetration regulation is 0.05g / m 2 / d, the traditional rubber fuel pipes and single-layer nylon pipes for automobiles can no longer meet the requirements of chemical corrosion performance and low fuel permeability of automobile fuel pipes

Method used

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  • High-barrier nylon pipeline for automobiles and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The thickness of the inner layer ETFE is 0.15mm; the thickness of the PA9T middle layer is 0.2mm; the thickness of the PA12 outer layer is 0.65mm.

[0021] Set the temperature of each stage of the extruder as follows: the temperature of the first zone of the barrel is 270°C, the temperature of the second zone of the barrel is 290°C, the temperature of the third zone of the barrel is 300°C, the temperature of the fourth zone of the barrel is 310°C, and the temperature of the first zone of the barrel The temperature of the second zone of the die is 310°C, the temperature of the third zone of the die is 310°C, and the die temperature is set to 310°C.

[0022] The extrusion temperature of the middle layer PA9T is set as follows: the temperature of the first zone of the barrel is 270°C, the temperature of the second zone of the barrel is 290°C, the temperature of the third zone of the barrel is 300°C, the temperature of the fourth zone of the barrel is 310°C, and the temperat...

Embodiment 2

[0025] The thickness of the inner layer of ETFE is 0.2mm; the thickness of the middle layer of PA9T is 0.1mm; the thickness of the outer layer of PA12 is 0.7mm.

[0026] The extrusion temperature of the inner layer ETFE is set as follows: the temperature of the first zone of the barrel is 280°C, the temperature of the second zone of the barrel is 300°C, the temperature of the third zone of the barrel is 310°C, the temperature of the fourth zone of the barrel is 320°C, and the temperature of the first zone of the machine head is 320°C, the temperature of the second zone of the nose is 320°C, the temperature of the third zone of the nose is 320°C, and the die temperature is set to 320°C.

[0027] The extrusion temperature of the middle layer PA9T is set as follows: the temperature of the first zone of the barrel is 280°C, the temperature of the second zone of the barrel is 300°C, the temperature of the third zone of the barrel is 310°C, the temperature of the fourth zone of the b...

Embodiment 3

[0030] The thickness of the inner layer of ETFE is 0.25mm; the thickness of the middle layer of PA9T is 0.15mm; the thickness of the outer layer of PA12 is 0.6mm.

[0031] The extrusion temperature of the inner layer ETFE is set as follows: the temperature of the first zone of the barrel is 290°C, the temperature of the second zone of the barrel is 310°C, the temperature of the third zone of the barrel is 320°C, the temperature of the fourth zone of the barrel is 330°C, and the temperature of the first zone of the machine head is 330°C, the temperature of the second zone of the nose is 330°C, the temperature of the third zone of the nose is 330°C, and the die temperature is set to 330°C.

[0032] The extrusion temperature of the middle layer PA9T is set as follows: the temperature of the first zone of the barrel is 290°C, the temperature of the second zone of the barrel is 310°C, the temperature of the third zone of the barrel is 320°C, the temperature of the fourth zone of the...

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Abstract

The invention relates to a high-barrier nylon pipeline for an automobile and a method for manufacturing the high-barrier nylon pipeline. The high-barrier nylon pipeline is of a three-layer composite structure and sequentially comprises an inner polyethylene-tetrafluoroethylene layer, a middle polyamide 9T layer and an outer nylon-12 layer from the inside to the outside. The thickness of the inner ETFE (ethylene tetrafluoroethylene) layer accounts for 15%-25% of the thickness of the wall of the pipeline, the thickness of the middle PA (polyamide) 9T layer accounts for 10%-20% of the thickness of the wall of the pipeline, and the thickness of the outer PA12 layer accounts for 60%-70% of the thickness of the wall of the pipeline. The high-barrier nylon pipeline and the method have the advantages that the high-barrier nylon pipeline is excellent in fuel oil barrier property and chemical substance resistance, the permeability of the high-barrier nylon pipeline is lower than 0.05g / m<2> / d, and bearable post-chemical burst pressure is higher than 6.8MPa; the high-barrier nylon pipeline is high in fuel oil resistance, fuel oil barrier property, chemical substance resistance and bearing strength, and has an extremely obvious significance on reducing environmental pollution and improving safe driving environments.

Description

technical field [0001] The invention relates to the field of automobile fuel pipelines, in particular to a nylon composite fuel pipeline for automobiles made of polyamide 9T and an ethylene-tetrafluoroethylene copolymer high barrier layer and a preparation method thereof. Background technique [0002] In the fuel delivery system, PA11 or PA12 is used as a single-layer fuel pipe, which has been proved to be safe and reliable after 50 years of use. The national 863 plan clearly proposes the use of methanol as an alternative energy source for gasoline. Now many automobile factories are launching methanol-fueled vehicles, but the National V standard follows the introduction of the Euro V standard, and the fuel penetration regulation is 0.05g / m 2 / d, the traditional rubber-type fuel pipes and single-layer nylon pipes for automobiles can no longer meet the requirements of chemical corrosion performance and low fuel permeability of automobile fuel pipes. Both force people to put f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L11/04B29C47/06
CPCB29C48/18B29C48/92B29C2948/92209F16L11/04
Inventor 张洪起张洪亮
Owner TIANJIN PENGYI GRP CO LTD