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Heat conductive plastic pipe

A technology of plastic pipes and heat-conducting materials, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., and can solve problems such as low heat transfer capacity, polluted medium, and difficult application

Inactive Publication Date: 2010-03-10
TIANJIN JUNXING PIPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of plastic is relatively poor, generally only about 0.2-0.5W / m·k, and it is used in some occasions, such as some pipes or heat exchangers used in chemical processes, which need to be used to complete heat absorption or heat release in the process Heat exchange, traditional metal materials, due to poor corrosion resistance, short service life, and pollution of the treated medium, it brings great difficulties to the application; plastics with good corrosion resistance have low thermal conductivity and low heat transfer capacity, making it Applications are limited, especially for sewage source heat pumps, seawater source heat pumps and soil source heat pumps, which have developed rapidly in recent years. Improve the thermal conductivity of plastic and use it to make heat exchangers, the service life, heat transfer efficiency, energy saving effect, etc. will be significantly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] (1) Formula

[0007] PP-R C4220 (Yanshan Petrochemical) 100

[0008] Graphite Fixed carbon ≥ 94%, particle size 1 ~ 30μm 20 ~ 25

[0009] Appropriate amount of coupling agent

[0010] Dispersant and other additives Proper amount

[0011] (2) Use coupling agent to activate the surface of graphite powder

[0012] (3) After the above-mentioned components are blended, they are melted, blended, plasticized, and pelletized on a continuous internal mixer granulation unit to obtain PP-R heat-conducting plastic pipe raw materials.

[0013] (4) The PP-R heat-conducting plastic pipe is obtained by extruding the heat-conducting plastic pipe raw material on a general-purpose extruding machine.

[0014] (5) After the PP-R heat-conducting plastic pipe sections are hot-melt-welded, the routine performance test is carried out according to GB / T18742.2-2002 "Polypropylene Pipeline System Part 2 Pipes for Hot and Cold Water", and all performances pass.

[0015] (6) Measure the thermal...

Embodiment 2

[0017] (1) Formula

[0018] HDPE PE100 100

[0019] Graphite Fixed carbon ≥ 94%, particle size 1 ~ 30μm 20 ~ 25

[0020] Appropriate amount of coupling agent

[0021] Appropriate amount of other additives such as dispersant and toughening agent

[0022] (2) Activate the surface of the graphite powder with a coupling agent, and then blend it with other components on a twin-screw extrusion granulation unit to melt, blend, plasticize and pelletize the strands to obtain HDPE heat-conducting plastic pipe raw materials.

[0023] (3) Extrude the raw material of the HDPE heat-conducting plastic pipe on the extruding unit to obtain the HDPE heat-conducting plastic pipe.

[0024] (4) The heat-conducting plastic pipe section of HDPE is hot-melt welded, and the routine performance test is carried out according to the standard of GB / T13663-2000 "polyethylene (PE) pipe for water supply", and all performances pass.

[0025] (5) Measure the thermal conductivity of the substrate resin HDPE...

Embodiment 3

[0027] When the thermal conductivity of the thermally conductive plastic pipe is not required to be high, if it is increased by about 0.3 to 0.5 times, the concentrated masterbatch of the thermally conductive raw material can be prepared first, and then mixed with the base resin to form the pipe, and the hot-melt welding test and performance test are carried out. Effect is identical with embodiment 1,2.

[0028] (1) Thermally conductive masterbatch formula

[0029] Carrier resin (PE-RT) 100

[0030] Aluminum nitride powder 70

[0031] Appropriate amount of coupling agent

[0032] Dispersant 3~5

[0033] Lubricant 1~1.5

[0034] Enhancer amount

[0035] Appropriate amount of toughening agent

[0036] Appropriate amount of coloring agent

[0037] Other additives Appropriate amount

[0038] (2) The surface of the aluminum nitride powder is activated by a coupling agent, and a colorant is added at the same time.

[0039] (3) After the above-mentioned components are blende...

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Abstract

A heat conductive plastic pipe is characterized by melt-mixing and modifying a pipe-grade thermoplastic resin with good corrosion resistance and micro powder of a heat conductive material with good corrosion resistance and high heat conductivity and then obtaining a tubing by extrusion molding, wherein, the heat conductivity is 150%-300% of the pipe-grade thermoplastic resin. The tubing can be directly applied to a ground source heat pump, a water source heat pump system and a floor radiant heating system as the heat-exchanging pipe, thus improving heat transfer capability of the system; and the tubing can be machined into heat exchangers with different styles and different structures by welding, and can be applied to the manufacturing processes of chemical industry, foods and medicine.

Description

technical field [0001] The invention relates to a thermally conductive plastic pipe for a heat exchanger Background technique [0002] Plastics have excellent corrosion resistance and are widely used in many fields. Such as many plastic containers, plastic pipes, etc. used in the chemical process, plastic has become an irreplaceable main material. The thermal conductivity of plastic is relatively poor, generally only about 0.2-0.5W / m·k, and it is used in some occasions, such as some pipes or heat exchangers used in chemical processes, which need to be used to complete heat absorption or heat release in the process Heat exchange, traditional metal materials, due to poor corrosion resistance, short service life, and pollution of the treated medium, it brings great difficulties to the application; plastics with good corrosion resistance have low thermal conductivity and low heat transfer capacity, making it Applications are limited, especially for sewage source heat pumps, se...

Claims

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Application Information

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IPC IPC(8): F16L9/12
Inventor 夏成文于东明韩英民吴晓芬秦岚
Owner TIANJIN JUNXING PIPE GRP CO LTD
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