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Manufacturing method of carbon fiber reinforced HDPE double-wall winding pipe

A production method and carbon fiber technology, applied in the field of pipes, can solve the problems of limited glass fiber and inorganic powder fillers, poor flexibility of pipe rings, low tensile strength, etc., and achieve improved environmental stress cracking resistance and high temperature resistance, high Excellent environmental stress crack resistance and interfacial compatibility

Inactive Publication Date: 2015-12-09
WUHAN QINGYUAN PIPE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since both glass fiber and inorganic powder are inorganic materials, the compatibility with HDPE organic resin matrix is ​​relatively poor
With the amount added, the brittleness of the pipe increases significantly, which is manifested by poor ring flexibility and low tensile strength of the pipe
These defects limit the practical application of glass fiber and inorganic powder fillers on pipes

Method used

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  • Manufacturing method of carbon fiber reinforced HDPE double-wall winding pipe
  • Manufacturing method of carbon fiber reinforced HDPE double-wall winding pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The high-density polyethylene compound is prepared from the following materials in parts by weight: 100 parts of high-density polyethylene, 1 part of 2,5-dimethyl-2,5 di-tert-butyl peroxide, 3 parts of thiourea, acrylic acid 5 parts of grafted polyethylene, 0.3 parts of dilauryl thiodipropionate; in addition, modified carbon fibers were prepared from the following substances in parts by weight: 100 parts of carbon fibers, and 3 parts of vinyltriethoxysilane.

[0026] During production, the high-density polyethylene compound and modified carbon fiber are reacted and co-extruded through a twin-screw extruder at a weight ratio of 90:10, extruded through a die and vacuum-shaped to obtain a carbon fiber-reinforced HDPE hollow square pipe; Then the carbon fiber reinforced HDPE hollow square pipe is manufactured into a carbon fiber reinforced HDPE double-walled winding pipe through spiral winding and plastic hot melt adhesive welding. The length-to-diameter ratio of the twin-s...

Embodiment 2

[0028] The high-density polyethylene compound is prepared from the following materials in parts by weight: 100 parts of high-density polyethylene, 2 parts of dicumyl peroxide, 0.5 part of diallyl maleate, glycidyl methacrylate graft poly 10 parts of ethylene, 0.05 part of tris(2,4-di-tert-butylphenyl) phosphite; in addition, modified carbon fiber was prepared from the following substances in parts by weight: 100 parts of carbon fiber, 0.5 part of vinyltrimethoxysilane.

[0029] During production, the high-density polyethylene compound and the modified carbon fiber are reacted and co-extruded through a twin-screw extruder at a weight ratio of 80:20, extruded through a die and vacuum-shaped to obtain a carbon fiber-reinforced HDPE hollow square pipe; Then the carbon fiber reinforced HDPE hollow square pipe is manufactured into a carbon fiber reinforced HDPE double-walled winding pipe through spiral winding and plastic hot melt adhesive welding.

Embodiment 3

[0031] The high-density polyethylene compound is prepared from the following materials in parts by weight: 100 parts of high-density polyethylene, 0.02 part of di-tert-butyl perphthalate, 5 parts of divinylbenzene, and 2 parts of maleic anhydride grafted polypropylene , 0.5 parts of tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythyl alcohol ester; In addition, modified carbon fiber is prepared from the following materials in parts by weight: 100 parts of carbon fiber, vinyl 5 parts of tris(2-methoxyethoxy)silane.

[0032] During production, the high-density polyethylene compound and the modified carbon fiber are first reacted and co-extruded through a twin-screw extruder at a weight ratio of 99.9:0.1, extruded through a die and vacuum-shaped to obtain a carbon fiber-reinforced HDPE hollow square pipe; Then the carbon fiber reinforced HDPE hollow square pipe is manufactured into a carbon fiber reinforced HDPE double-walled winding pipe through spiral windin...

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Abstract

The invention discloses a manufacturing method of a carbon fiber reinforced HDPE double-wall winding pipe; firstly, a high-density polyethylene mixture is prepared by high-density polyethylene, a peroxide initiator, polyfunctional group monomers, a high molecular compatilizer and antioxidant; and modified carbon fibers are prepared by carbon fibers and a silane coupling agent. Then, the high-density polyethylene mixture and the modified carbon fibers are reacted and coextruded through a double-screw extruder, and are extruded by a mold and shaped in vacuum to obtain a carbon fiber reinforced HDPE hollow square pipe; and then, the carbon fiber reinforced HDPE hollow square pipe is spirally wound and welded by plastic hot melt adhesive to manufacture the carbon fiber reinforced HDPE double-wall winding pipe. As carbon fiber reinforced HDPE is adopted to manufacture the hollow square pipe, the creep resistance, the modulus, the impact resistance, the scratch resistance, the slow-speed crack expansibility resistance, the environmental stress cracking resistance and the high-temperature resistance are all greatly improved; and the double-wall winding pipe totally has enough gap tensile strength, so that the whole performance of the pipe is effectively improved.

Description

technical field [0001] The invention relates to pipe materials, in particular to a method for manufacturing a carbon fiber reinforced HDPE double-wall winding pipe. Background technique [0002] High-density polyethylene (HDPE) double-wall winding pipe uses high-density polyethylene as the main raw material. After being extruded into a square pipe, it is a spiral shape with a square hole in the pipe wall made by winding and welding processes. Spiral pipe, its axial wall section is double-wall I-shaped, the inner wall is dense and smooth, hollow, the pipe itself is light in weight and high in strength. Due to its unique forming process, it can produce large-diameter pipes with a diameter up to 3000mm. As a new type of chemical building material, HDPE double-wall winding pipe has the advantages of light weight, corrosion resistance, smooth pipe wall, large flow capacity, good sealing performance, long service life, convenient transportation and installation, and fast construc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C47/38B29C53/58B29C65/40B29C48/395
Inventor 苏长裕杨永喆刘涛
Owner WUHAN QINGYUAN PIPE CO LTD
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