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A high-strength polyethylene pipe for nuclear power

A polyethylene pipe and high-strength technology, which is applied in the field of high-strength nuclear power polyethylene pipes, can solve the problems of limited compensation effect, slow cooling and solidification speed, and the pipe wall cannot meet the tolerance requirements, so as to prevent sagging and high melting. Body strength, effect of preventing phenomena

Active Publication Date: 2018-10-30
SHANGHAI ZHONGSU PIPE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the extrusion process of large-diameter polyethylene pipes, due to the thickness of the pipe wall, the cooling and solidification speed is slow, and the melt will sag under the action of gravity. After the pipe embryo leaves the die, the upper wall thickness is small and the lower wall thickness is large. The sagging phenomenon causes the pipe wall to fail to meet the tolerance requirements, and the butt fusion welding that meets the requirements cannot be achieved
At present, the solution of the existing technology is to adjust the die gap, increase the upper gap, and reduce the lower gap at the same time, but the compensation effect is limited

Method used

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  • A high-strength polyethylene pipe for nuclear power
  • A high-strength polyethylene pipe for nuclear power
  • A high-strength polyethylene pipe for nuclear power

Examples

Experimental program
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Effect test

Embodiment

[0138] A vinyl polymer

[0139] A1 Borealis HE3490-LS, 0.25g / 10min (190℃ / 5.0kg) 959kg / m 3

[0140] A2 Borealis HE3470-LS, 0.30g / 10min (190℃ / 5.0kg) 956kg / m 3

[0141] A3 Borealis HE3474-LS, 0.30g / 10min (190℃ / 5.0kg) 948kg / m 3

[0142] A4 PetroChina Dushanzi Petrochemical Company J50-08, 6.5g / 10min (190℃ / 5.0kg) 950kg / m 3

[0143] B fluorinated styrene

[0144] B1 2-fluorostyrene, Shanghai Yuanye Biotechnology Co., Ltd.

[0145] B2 4-fluorostyrene, Shanghai Yishenghui Biomedical Technology Co., Ltd.

[0146] C organosilane

[0147] C1 Aminopropyltriethoxysilane, United Carbon A-1100

[0148] C2 3-Glycidyloxypropyltrimethoxysilane, GE A-187

[0149] C3 Vinyltrimethoxysilane, UTC A-171

[0150] D UV absorber

[0151] 2-(2'-Hydroxy-3',5'-dihydroxy-tert-butylphenyl)benzotriazole, BASF Tinuvin 320

[0152] Antioxidant

[0153] 1-Hydroxy-3-methyl-4-isopropylbenzene, Osaka Chemical Biosol A

[0154] F lubricant

[0155] Behenamide, American Fine Organics Behenamide-55

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Abstract

The invention discloses a high-strength polyethylene pipe for nuclear power. The high-strength polyethylene pipe at least comprises the following components in parts by weight: 100 parts of vinyl polymer, 0.1-0.3 part of fluorine-containing styrene, 0.05-0.1 part of organic silane, 0.05-0.5 part of an ultraviolet absorbent, 0.05-0.3 part of an anti-oxidant, and 0.5-2 parts of a lubricant.

Description

technical field [0001] The invention relates to the field of polyethylene pipes, in particular to a high-strength polyethylene pipe for nuclear power. Background technique [0002] Polyethylene (PE for short) has a variety of structures and properties, and is a resin with a wide range of uses. Polyethylene is a thermoplastic highly crystalline non-polar polymer. Polyethylene pipe is the second largest consumption of plastic pipes in the world after PVC-U. It has excellent characteristics such as long life, light weight, easy welding, corrosion resistance, and coilability. It is widely used in gas transmission, water supply, sewage discharge, Agricultural irrigation, oil fields, mines, transportation of chemical liquids, gases and flowing solid substances, post and telecommunications and other fields. [0003] Polyethylene pipes have been widely used in urban gas and water supply and distribution systems. Due to the unique characteristics of connection integrity, sealing, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/3475C08K5/03C08K5/544C08K5/20
CPCC08K5/03C08K5/20C08K5/3475C08K5/544C08K13/02C08K2201/014C08L2203/18C08L23/06
Inventor 刘志光郑祥义
Owner SHANGHAI ZHONGSU PIPE