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A kind of high thermal conductivity radiation cross-linked polyethylene pipe and its preparation method and application

A technology of radiation cross-linking and polyethylene pipes, which is applied in the field of high thermal conductivity radiation cross-linked polyethylene pipes and its preparation, can solve the problems of poor acid corrosion resistance, increased pipe brittleness, and low hydraulic pressure resistance of heat-conducting polyethylene pipes. Achieve the effects of cheap processing, improved brittleness, and wide service temperature

Active Publication Date: 2022-07-01
FSPG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention uses a large amount of graphite for filling modification, which will increase the brittleness of the pipe, and does not add other modification additives to improve its impact resistance and environmental stress cracking resistance, and it is prone to brittle cracking at low temperatures
[0006] It can be seen from the above that the heat-conducting polyethylene pipes produced by the existing technology have problems such as poor acid corrosion resistance, low hydraulic pressure resistance, and low temperature brittleness, and are not suitable for transporting acidic fluids under pressure under wide operating temperatures, etc. harsh application scenarios

Method used

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  • A kind of high thermal conductivity radiation cross-linked polyethylene pipe and its preparation method and application
  • A kind of high thermal conductivity radiation cross-linked polyethylene pipe and its preparation method and application
  • A kind of high thermal conductivity radiation cross-linked polyethylene pipe and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A high thermal conductivity radiation cross-linked polyethylene pipe, prepared by the following method (such as figure 1 shown):

[0063] 1) Preparation of modified masterbatch (such as figure 2 shown):

[0064] Surface activation: first add 48 parts of 25 μm expandable graphite and 2 parts of 5 μm boron nitride into a high-speed mixer, and stir at 60~70 °C for 5 min; then take 1.5 parts of silane coupling agent KH-550 for 3 100% industrial white oil was diluted and added to the powder, and the stirring was continued for 8 min;

[0065] Mixing and granulation: 50 parts of high-density polyethylene 5502, 15 parts of thermoplastic elastomer (10 parts of ethylene-vinyl acetate copolymer and 5 parts of ethylene-propylene copolymer), 2 parts of cross-linking sensitizer diethylene glycol Alcohol diacrylate and 0.5 part of antioxidant (0.3 part of 1010 and 0.2 part of 168) were added to the surface-activated powder, and stirred at high speed for 12 min. Then, the mixed ra...

Embodiment 2

[0075] A high thermal conductivity radiation cross-linked polyethylene pipe is prepared by the following method:

[0076] 1) Preparation of modified masterbatch:

[0077] Surface activation: first add 16 parts of 45 μm natural graphite and 4 parts of 20 μm boron nitride into a high-speed mixer, and stir at 55~65 ° C for 3 min; After diluting with absolute ethanol, add it to the powder, and continue stirring for 7 min;

[0078] Mixing and granulation: 20 parts of medium density polyethylene DX800, 5 parts of thermoplastic elastomer (2 parts of ethylene-vinyl acetate copolymer and 3 parts of ethylene-octene copolymer), 2.5 parts of cross-linking sensitizer trimethylol Propane trimethacrylate and 0.5 part of antioxidant (0.3 part of 1010 and 0.2 part of 1178) were added to the surface-activated powder and stirred at high speed for 10 min. The same as in Example 1.

[0079] 2) Extrusion of heat-conducting pipes:

[0080] The modified masterbatch obtained in the previous step a...

Embodiment 3

[0084] A high thermal conductivity radiation cross-linked polyethylene pipe is prepared by the following method:

[0085] 1) Preparation of modified masterbatch:

[0086] Surface activation: first add 100 parts of 15 μm colloidal graphite and 25 parts of 2 μm boron nitride into a high-speed mixer, and stir at 70-80 °C for 5 min; then take 5 parts of aluminum-titanium composite coupling agent HY-133, Add 10 parts of industrial white oil to the powder after dilution, and continue to stir for 10 min;

[0087] Mixed granulation: 40 parts of medium density polyethylene SP980, 45 parts of thermoplastic elastomer (35 parts of ethylene-vinyl acetate copolymer and 10 parts of ethylene-butene copolymer), 3 parts of cross-linking sensitizer trimethylol Propane triacrylate and 1 part of antioxidant (0.7 part of 754 and 0.3 part of 168) were added to the surface-activated powder, and stirred at high speed for 15 min. The same as in Example 1.

[0088] 2) Extrusion of heat-conducting pip...

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Abstract

The invention provides a high thermal conductivity radiation cross-linked polyethylene pipe, a preparation method and application thereof, and relates to the technical field of polymer materials. The high thermal conductivity radiation cross-linked polyethylene pipe material of the present invention is prepared from the following raw materials in parts by weight: 100 parts of polyethylene, 5 to 180 parts of graphite, 0.1 to 40 parts of boron nitride, 5 to 90 parts of thermoplastic elastomer, and additives. 0.2-108 parts; the additives include: 0.05-9 parts of coupling agent, 0.05-90 parts of diluent, 0-6 parts of cross-linking sensitizer, and 0.1-3 parts of antioxidant. The cross-linked polyethylene pipe produced by the method of the present invention through the process steps of activation granulation, pipe extrusion and radiation cross-linking has the characteristics of high thermal conductivity, hydraulic resistance, acid corrosion resistance, wide service temperature, etc., and can be applied to buildings Floor heating system, ground source heat pump system and chemical shell and tube heat exchanger, etc.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high thermal conductivity radiation cross-linked polyethylene pipe material and a preparation method and application thereof. Background technique [0002] Polyethylene is a recyclable, non-toxic and tasteless non-polar thermoplastic resin. The pipes made of it have outstanding advantages such as hydraulic resistance, corrosion resistance, safety and hygiene, etc., and are widely used in civil water heating and industrial water heating. field. However, the thermal conductivity of polyethylene is only 0.44 W / (m∙K), which is less than 1% of that of steel, which seriously limits the heat exchange efficiency of pipes and makes it difficult to achieve efficient utilization of thermal energy resources. Therefore, the manufacture of high thermal conductivity polyethylene pipes has become one of the research hotspots concerned by engineers and technicians. [0003] Chinese ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/16C08L23/08C08K3/04C08K3/38C08K7/24C08K9/06C08J3/22C08J7/12
CPCC08L23/06C08J3/22C08J7/123C08J2323/06C08J2423/06C08J2423/08C08K2003/385C08L2205/03C08L2203/18C08L2207/062C08L2312/06C08L23/16C08L23/0853C08L23/0815C08K3/04C08K3/38C08K7/24C08K9/06C08K9/04
Inventor 霍伟智孔令光赵照孔德敬王清
Owner FSPG HI TECH
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