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Insulative heat-conducting materials of heating electric cable and use thereof

A technology for insulated heat conduction and heating cables, applied in the field of functional polymers, can solve the problems of low heat conduction efficiency of heating cables, and achieve the effects of improving life, reducing energy consumption, excellent dielectric properties and processing properties

Inactive Publication Date: 2006-08-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcoming of low overall heat conduction efficiency of traditional heating cables, and provide an insulating and heat-conducting material for heating cables with excellent processability and high thermal conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Component Content (g)

[0037] Aluminum nitride 30

[0038] Polypropylene 70

[0039] Antioxidant 1010 0.5

[0040] Zinc stearate 0.5

[0041] Calcium carbonate 5.0.

[0042] The above components are kneaded, twin-screw extruded and granulated to obtain an insulating and heat-conducting material. After testing, the thermal conductivity is 5.2w·(m·k) -1 , the volume resistivity is greater than 10 14 Ω·m.

Embodiment 2

[0044] Component Content (g)

[0045] Boron nitride 40

[0046] Polypropylene 60

[0047] Antioxidant 1010 0.5

[0048] Zinc stearate 0.5

[0049] Calcium carbonate 5.0.

[0050] The above components are kneaded, twin-screw extruded and granulated to obtain an insulating and heat-conducting material. After testing, the thermal conductivity is 8.4w·(m·k) -1 , the volume resistivity is greater than 10 14 Ω·m.

Embodiment 3

[0052] Component Content (g)

[0053] Aluminum Nitride 20

[0054] Polyphenylene sulfide 80

[0055] Antioxidant 1010 1.0

[0056] Zinc stearate 0.5.

[0057] The above components are kneaded, twin-screw extruded and granulated to obtain an insulating and heat-conducting material. After testing, the thermal conductivity is 3.1w·(m·k) -1 , the volume resistivity is greater than 10 14 Ω·m.

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Abstract

An insulating conductive material for heating electric cable and its use are disclosed. The insulating conductive material consists of ceramic material and polymer materials in proportion of 1:1-9, lubricant 0.1-2wt%, antioxidant 0.1-2wt% and carbon material 5-20wt%. The ceramic material is chosen from any kind of aluminum nitride and boron nitride; the polymer material is chosen from any kind of polypropylene, polystyrene, polyphenyl, polyvinyl chloride, polythene, vinylidene difluoride and polyperfluoropropene. It has excellent machining performance and better heat conductivity.

Description

(1) Technical field [0001] The invention relates to an insulating and heat-conducting material with the functions of insulation, heat conduction and protection, in particular to the outer covering layer and the outermost protective layer used as heating elements when manufacturing heating cables. It belongs to the field of functional polymers. (2) Background technology [0002] Heating cable is a new type of electric thermal insulation material, which is widely used in household floor heating, pipeline equipment antifreeze insulation, road and roof ice and snow melting, automobile and other fields. The cross-sectional structure of the most basic heating cable is: heating element, insulating and heat-conducting layer, electromagnetic shielding layer, and outermost protective layer from inside to outside. At present, the insulation and heat conduction layer of the heating cable is mainly made of cross-linked polyvinyl chloride, silane cross-linked polyethylene or fluororubbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/08H01B3/30H01B7/17
Inventor 乔梁郑精武姜力强盛嘉伟
Owner ZHEJIANG UNIV OF TECH
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