Glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe and manufacture method thereof

A production method and a technology of winding pipes, which are applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc., can solve problems such as difficulty in forming interaction force, degradation of material properties, and fast crystallization speed, and achieve good interface compatibility , Improve the overall performance, the effect of high environmental stress cracking resistance

Active Publication Date: 2014-04-09
SHANGHAI QINGYUAN PIPE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the creep coefficient of high polyethylene pipes, people consider using long glass fibers to modify polyethylene like engineering plastics, but polyethylene is a non-polar polymer with a fast crystallization speed, and the interface between it and glass fibers The compatibility is poor, and it is difficult to form an interaction force. After simply adding glass fibers, the performance of the material may even decline. content problem

Method used

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  • Glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe and manufacture method thereof
  • Glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe and manufacture method thereof
  • Glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe and manufacture method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Prepare the high-density polyethylene compound according to the following weights:

[0032]

[0033] b. Prepare modified glass fibers by the weight of the following substances:

[0034] Long glass fiber 100 kg,

[0035] Vinyltriethoxysilane 3 kg;

[0036] c. Take 80 kg of the above-mentioned high-density polyethylene compound and 20 kg of modified glass fiber to carry out reaction co-extrusion on a twin-screw extruder, extrude through a die and vacuum shape to obtain a glass fiber-reinforced high-density polyethylene hollow square tube ;

[0037] d. The glass fiber reinforced HDPE hollow square tube is fabricated into a glass fiber reinforced HDPE double-walled winding tube through spiral winding welding.

[0038] The length-to-diameter ratio of the twin-screw extruder is not less than 38:1, the screw temperature is 90-260°C, the rotation speed is 120-600 rpm, and the residence time of the material in the screw extruder is 3-9 minutes.

[0039] The melt index ...

Embodiment 2

[0041] a. Prepare the high-density polyethylene compound according to the following weights:

[0042]

[0043] b. Prepare modified glass fibers by the weight of the following substances:

[0044] Long glass fiber 100 kg,

[0045] Vinyl tris (2-methoxyethoxy) silane 2 kg;

[0046] c. Take 70 kg of the above-mentioned high-density polyethylene compound and 30 kg of modified glass fiber to carry out reaction co-extrusion on a twin-screw extruder, extrude through a mold and vacuum shape to obtain a glass fiber reinforced high-density polyethylene hollow square tube ;

[0047] All the other are with embodiment 1.

Embodiment 3

[0049] a. Prepare the high-density polyethylene compound according to the following weights:

[0050]

[0051] b. Prepare modified glass fibers by the weight of the following substances:

[0052] Long glass fiber 100 kg,

[0053] Vinyl tributylketoxime silane 1 kg;

[0054] c. Take 90 kg of the above-mentioned high-density polyethylene compound and 10 kg of modified glass fiber to carry out reaction co-extrusion on a twin-screw extruder, extrude through a mold and vacuum shape to obtain a glass fiber-reinforced high-density polyethylene hollow square tube ;

[0055] All the other are with embodiment 1.

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Abstract

The invention relates to a glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe, which is formed by spirally winding a glass fiber enhanced HDPE plastic pipe and welding the glass fiber enhanced HDPE plastic pipe by plastic hot melt adhesives, wherein the glass fiber enhanced HDPE plastic pipe is a hollow rectangular glass fiber enhanced HDPE plastic pipe with the long glass fiber content being 5 percent to 40 percent by weight. A manufacture method of the glass fiber enhanced HDPE double-walled winding pipe comprises the following steps that HDPE mixed materials are prepared, modified long glass fiber is prepared, the HDPE mixed materials and the modified long glass fiber take reaction and are coextruded into a hollow square pipe, and the hollow square pipe is made into the glass fiber enhanced HDPE double-walled winding pipe through spiral winding and plastic hot melt adhesive welding. The glass fiber enhanced HDPE double-walled winding pipe has the advantages that the creep resistance, the modulus, the impact resistance, the scratch resistance, the slow crack expansion resistance, the environment stress cracking resistance and the high-temperature resistance are good, the whole body has sufficient sewing stretching intensity, and the integral performance of pipelines is effectively improved.

Description

technical field [0001] The invention relates to a pipe material, in particular to a glass fiber reinforced HDPE double-wall winding pipe and a manufacturing method thereof. Background technique [0002] The high-density polyethylene double-wall winding pipe is made of high-density polyethylene (HDPE) as the main raw material, and is wound in a hot-melt state by a special extrusion process. Its axial wall section is double-wall I-shaped, and 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 construction speed. It is widely used in the construction of drainage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/16F16L9/18B29C69/00B29C47/92C08L23/06C08K13/06C08K9/06C08K7/14B29C48/92
CPCB29B7/90B29B7/46B29B7/72B29C48/13B29C48/92
Inventor 苏长裕郑敏王鹏甄万清陈燕刘天玺
Owner SHANGHAI QINGYUAN PIPE TECH
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