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Preparing method for HDPE pipe

A preparation step and powder technology, applied in the field of HDPE pipe preparation, can solve the problems of poor toughness of HDPE pipes, easy corrosion of conveying pipes, inability to bend greatly, etc., and achieve the effect of increasing the heat dissipation area

Inactive Publication Date: 2020-02-04
张业毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem mainly solved by the present invention is to provide a HDPE pipe preparation method in view of the defects that the current HDPE pipe has poor toughness, cannot be greatly bent during the laying process, has poor heat resistance stability, and is prone to corrosion as a conveying pipeline.

Method used

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  • Preparing method for HDPE pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The release agent is: silicone oil

[0032] Preparation of mud:

[0033] In parts by weight, add 70 parts of kaolin, 20 parts of alumina, 10 parts of titanium dioxide, and 20 parts of aluminum phosphate to 400 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 5, heat up to 50°C, and keep it warm for 10 hours to obtain slurry;

[0034] Preparation of silica-alumina reinforced fibers:

[0035] 30 parts of nano-silica airgel, 30 parts of montmorillonite, and 200 parts of water are mixed to obtain nano-silica airgel slurry, and then the above-mentioned mud and nano-silica airgel slurry are 4 in volume ratio: 1 Mix, put into the crucible in the muffle furnace, heat to 700°C, preheat for 40 minutes, then raise the temperature to 1300°C, keep warm for 30 minutes to obtain molten material liquid, and obtain silicon-aluminum reinfo...

Embodiment 2

[0045] The release agent is: polyethylene glycol

[0046] Preparation of mud:

[0047] In parts by weight, add 75 parts of kaolin, 25 parts of alumina, 12.5 parts of titanium dioxide, and 21 parts of aluminum phosphate to 450 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 5.5, heat up to 55°C, and keep it warm for 12.5 hours to obtain slurry;

[0048] Preparation of silica-alumina reinforced fibers:

[0049] 40 parts of nano-silica airgel, 35 parts of montmorillonite, and 250 parts of water are mixed to obtain nano-silica airgel slurry, and then the above-mentioned mud and nano-silica airgel slurry are 4 in volume ratio: 1 Mix, put into a crucible in a muffle furnace, heat to 750°C, preheat for 45 minutes, then raise the temperature to 1325°C, keep warm for 32.5 minutes to obtain molten material liquid, and obtain silicon-alum...

Embodiment 3

[0059] The release agent is: low molecular weight polyethylene

[0060] Preparation of mud:

[0061]In parts by weight, add 80 parts of kaolin, 30 parts of alumina, 15 parts of titanium dioxide, and 22 parts of aluminum phosphate to 500 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 6, heat up to 60°C, and keep the temperature for 15 hours to obtain the slurry;

[0062] Preparation of silica-alumina reinforced fibers:

[0063] 50 parts of nano-silica airgel, 40 parts of montmorillonite, and 300 parts of water are mixed to obtain nano-silica airgel slurry, and then the above-mentioned mud and nano-silica airgel slurry are in a volume ratio of 4: 1 Mix, put into the crucible in the muffle furnace, heat to 800°C, preheat for 50 minutes, then raise the temperature to 1350°C, keep warm for 35 minutes to obtain molten material liqui...

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Abstract

The invention belongs to the technical field of plastic pipe preparing and particularly relates to a preparing method for an HDPE pipe. By means of the preparing method, kaolin, aluminum oxide, titanium dioxide, aluminum phosphate and water are mixed, an outer rubber pipe layer is entangled and wrapped by silicon-aluminum reinforced fibers to be arranged into the inner layer of a double-layer corrugated pipe die, the inner layer is filled with filling glue, the double-layer corrugated pipe die is put into a hot pressing device to be subjected to hot pressing, and the HDPE pipe is extruded. Bymeans of the preparing method for the HDPE pipe, the heat conduction coefficient of graphite powder with the fineness being 200 meshes is relatively large, a cooling effect is achieved, and a protection effect is achieved on the HDPE pipe through the silicon-aluminum reinforced fibers. High density polyethylene powder is adopted as the main raw material to prepare an outer rubber pipe layer in a vulcanization forming manner, the HDPE pipe is enhanced through silicon-aluminum reinforced fiber layer wrapping, EPDM has low-temperature elasticity, and toughness and elasticity of the HDPE pipe areimproved; in addition, the EPDM has the good oil resistance property and the good acid and alkali corrosion resisting performance; and a layer of anti-corrosion protection film is provided, meanwhile,zinc methacrylate is adopted as a heat-resisting antioxidant, compatibility of components doped in the HDPE pipe is improved, the anti-corrosion performance is improved, and a wide application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of plastic pipe preparation, and in particular relates to a preparation method of HDPE pipe. Background technique [0002] Almost all polymers are accompanied by aging phenomena, and HDPE is no exception. As far as HDPE is concerned, there are inevitably aging weaknesses caused by unsaturated double bonds, branched chains, and terminal groups. During its storage, processing, and use, it is subjected to heat, oxygen, and light. The result is The structure of HDPE changes, and the relative molecular weight decreases or cross-linking occurs, which reduces the performance of the material or even leads to damage. Therefore, the anti-aging performance of HDPE materials is very important. In order to inhibit the aging of HDPE, maintain material performance, and prolong service life, the most common and effective method is to add antioxidants to it; antioxidants mainly include amines, phenols, phosphorus-containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D23/18C08L23/06C08L91/00C08L23/16C08K3/22C08K5/098D01F9/08
CPCB29D23/18C08K2003/2296C08L23/06C08L2203/18C08L2205/03C08L2207/062D01F9/08C08L91/00C08L23/16C08K3/22C08K5/098
Inventor 张业毅
Owner 张业毅
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