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PE-RT modified special material for steel frame-plastic complex pipe

A technology of PE-RT and PE-RT80, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of poor temperature resistance and achieve slow crack growth resistance, stable performance, and hardness high effect

Inactive Publication Date: 2010-01-27
DAQING PETROLEUM ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses PE-RT as the plastic raw material, and prepares a special material for the steel skeleton plastic composite pipe with higher heat distortion temperature, metal aging resistance and slow crack growth resistance by modifying it. The disadvantage of poor temperature resistance of the pipe makes the steel skeleton plastic composite pipe more widely used

Method used

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  • PE-RT modified special material for steel frame-plastic complex pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, the steps of the preparation method of the PE-RT special material for steel skeleton plastic composite pipe of the present embodiment are as follows: A, nano silicon dioxide 5~10%, antioxidant 0.5~1%, anti-metal aging agent 0.5~1 % put into the high mixer and after 5~10 minutes of cold mixing, uniformly dispersed powder is obtained; B, by weight percentage, PE-RT polyethylene 80~90%, EVA resin 3~5% in the high mixer Stir, heat to 100~120°C while stirring, add the uniformly dispersed powder obtained by step A to the high mixer after cold mixing in the high mixer according to the weight percentage, and add it to the high mixer, premix at high speed in the high mixer for 5-10 minutes to obtain Granular mixture; C. Send the granular mixture obtained in step B to the twin-screw extruder, the temperature of the feed port is 150~160°C, the temperature of the melt is 200~220°C, and the temperature of the die is 200~210°C Extrusion special materials range.

Embodiment 2

[0018] Example 2: The polyethylene special material for buried drainage pipes of this embodiment consists of 90% PE-RT polyethylene, 5% activated modified nano-silica, 4% EVA resin, 0.5% antioxidant, Composition of anti-metal aging agent 0.5%.

Embodiment 3

[0019] Example 3: The polyethylene special material for buried drainage pipes of this embodiment consists of 85% PE-RT polyethylene, 10% activated modified nano-silica, 3% EVA resin, 1% antioxidant, Composition of anti-metal aging agent 1%.

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Abstract

The invention discloses a PE-RT modified special material for a steel frame-plastic complex pipe. The special material is prepared by using the following components according to percent by weight: 80-90% of polyethylene PE-RT, 5-10% of nano-silica, 3-8% of EVA resin (15%-18% of ethylene), 0.5-1% of anti-oxidant and 0.5-1% of anti-metal-aging agent. The invention adopts the PE-RT as the plastic raw material and modifies the PE-RT to prepare the special material for the steel frame-plastic complex pipe which has high thermal deformation temperature and good performance in metal aging prevention and slow crack propagation resistance. The invention also overcomes the defect of poor temperature resistibility of past steel frame-plastic complex pipes and enlarges the application scope of the steel frame-plastic complex pipe.

Description

Technical field: [0001] The invention relates to a special material for PE-RT modified by additives, in particular to a special material for PE-RT modification of a steel frame plastic composite pipe. Background technique: [0002] Steel skeleton plastic composite pipe is a new type of composite pressure pipe. It can be widely used in the transportation of gases and liquids in petroleum, chemical, municipal, construction, agricultural, pharmaceutical and other industries. It is an ideal substitute for ordinary steel pipes and galvanized steel pipes. Creep, easy installation and high cost performance are widely used in petroleum, chemical, gas, water supply, sewage, mining, seawater transportation and other industries. As a new type of non-metallic pipe with a wide range of uses, it has the advantages of low cost, saving a lot of metal materials, and stable performance. However, when this kind of pipeline is used for hot water pipelines such as urban heating, its temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L31/04C08K9/00C08K3/36F16L9/147
Inventor 林宝清冯海彦姜琳琳
Owner DAQING PETROLEUM ADMINISTRATION
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