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Rigid PE-RT (polyethylene of raised temperature resistance) pipe and production process thereof

A PE-RT and production process technology, applied in the field of hard PE-RT pipe and its production process, to achieve the effect of improving production efficiency, prolonging service life and good ring stiffness

Active Publication Date: 2019-05-31
石家庄星泉管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the great potential of rigid PE-RT pipes in the domestic market, the production has expanded rapidly, and the existing pipe production methods can no longer meet the production needs of more and more PE-RT pipes. Therefore, it is necessary to improve the existing PE-RT pipes. RT pipe and its production process for further research

Method used

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  • Rigid PE-RT (polyethylene of raised temperature resistance) pipe and production process thereof
  • Rigid PE-RT (polyethylene of raised temperature resistance) pipe and production process thereof
  • Rigid PE-RT (polyethylene of raised temperature resistance) pipe and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, carry out the production of the PE-RT pipe material of diameter 30-50mm, described pipe material comprises 100 parts of PE-RT resins, 1.6 parts of tribasic lead sulfate, 1 part of tribasic sulfuric acid Lead phosphate, 0.3 parts lead stearate, 0.2 parts calcium stearate, 0.3 parts barium stearate, 0.4 parts stearic acid, 0.35 parts paraffin wax, 0.15 parts PE wax, 15 parts light calcium carbonate and 0.011 parts carbon black , the production process of the rigid PE-RT pipe according to the above-mentioned proportioning comprises the following steps:

[0029] A. Raw material mixing

[0030] PE-RT resin, tribasic lead sulfate, tribasic lead phosphite, lead stearate, calcium stearate, barium stearate, stearic acid, paraffin wax, PE wax, light calcium carbonate and carbon black Add it into the drying mixer according to the proportion, remove the water, dry it fully, and mix it to get the mixture. The drying temperature is set at 75°C;

[0031] B. Mixing

[...

Embodiment 2

[0043] Example 2, as another embodiment of the proportioning of the pipes in Example 1, the pipes include 100 parts of PE-RT resin, 1 part of tribasic lead sulfate, 0.8 parts of tribasic lead sulfate according to the ratio of parts by mass. Lead phosphite, 0.25 parts lead stearate, 0.2 parts calcium stearate, 0.3 parts barium stearate, 0.55 parts stearic acid, 0.45 parts paraffin, 0.18 parts PE wax, 28 parts light calcium carbonate and 0.012 parts carbon black.

Embodiment 3

[0044] Example 3, as another embodiment of the proportioning of the pipes in Example 1, the pipes include 100 parts of PE-RT resin, 2.3 parts of tribasic lead sulfate, 1.3 parts of tribasic lead sulfate according to the ratio of parts by mass. Lead phosphite, 0.38 parts of lead stearate, 0.2 parts of calcium stearate, 0.3 parts of barium stearate, 0.25 parts of stearic acid, 0.25 parts of paraffin, 0.12 parts of PE wax, 4 parts of light calcium carbonate and 0.01 part of carbon black.

[0045] The pipe material ratio and processing technology adopted in the present invention have improved low-temperature brittleness resistance. The low-temperature brittleness resistance is -78°C, which is 8°C higher than the existing -70°C. Generally, there will be no low-temperature brittleness problem in the environment; there is also a relatively obvious increase in high-temperature resistance, and the long-term high-temperature resistance is 94 ° C, which is 4 ° C higher than the conventio...

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Abstract

The invention relates to a rigid PE-RT pipe and a production process thereof. The rigid PE-RT pipe is composed of, by weight part, 100 parts of PE-RT resin, 0.8-2.5 parts of tribasic lead sulfate, 0.6-1.5 parts of tribasic lead phosphite, 0.23-0.4 part of lead stearate, 0.2 part of calcium stearate, 0.3 part of barium stearate, 0.2-0.6 part of stearic acid, 0.2-0.5 part of paraffin, 0.1-0.2 part of PE (polyethylene) wax, 1-30 parts of light calcium carbonate and 0.01-0.02 part of carbon black. The rigid PE-RT pipe is prepared from the materials above through steps of raw material mixing, blending, extrusion, shaping, pipe drawing, cutting and the like. The produced rigid PE-RT pipe is white and glossy in appearance, bright in color, free from surface scratch and significantly increased inproduction efficiency.

Description

technical field [0001] The invention belongs to the technical field of plastic pipe processing, and in particular relates to a hard PE-RT pipe and a production process thereof. Background technique [0002] Plastic pipe is a bulk product in plastic products, and the output of rigid polyvinyl chloride pipe, that is, rigid PE-RT pipe accounts for more than 30% of the total plastic pipe output. Compared with pipe materials, it has the advantages of low density, easy coloring, no need for painting, corrosion resistance, low thermal conductivity, good insulation performance, low energy consumption, small flow resistance, no scaling on the inner wall, convenient construction, installation and maintenance, etc. Due to the great potential of rigid PE-RT pipes in the domestic market, the production has expanded rapidly, and the existing pipe production methods can no longer meet the production needs of more and more PE-RT pipes. Therefore, it is necessary to improve the existing PE-R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L91/06C08K13/02C08K3/30C08K5/098C08K5/09C08K3/26B29C48/92B29C48/32B29C48/09B29C48/025
Inventor 樊荣赵玉林魏敏朱志敏
Owner 石家庄星泉管业有限公司
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