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Low-resistance PTC (positive temperature coefficient) composite material

A composite material, low-resistance technology, applied in the field of low-resistance PTC composite materials, can solve the problems of small resistance thermal stability, unstable material properties, easy deposition, etc. The effect of high PTC strength

Inactive Publication Date: 2014-05-21
ANBANG ELECTRICAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If carbon nanotubes are used as conductive fillers, the mass percentage of carbon nanotubes that need to be filled is more than 20%. , due to the high density of the metal, it is easy to deposit, the dispersion is uneven, and the metal particles are easy to oxidize, and the material performance is not stable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] High-density polyethylene: 55 parts;

[0034] Carbon black: 12 parts

[0035] Carbon nanotubes: 4 parts;

[0036] NDZ-101: 1 part;

[0037] Magnesium hydroxide: 3 parts;

[0038] Anti-1010: 0.5 parts;

[0039] PP-g-MAH: 3 parts.

Embodiment 2

[0041] Low-density polyethylene: 60 parts;

[0042] Carbon black: 33 parts

[0043] Carbon nanotubes: 2 parts;

[0044] NDZ-40: 2 parts;

[0045] Aluminum oxide: 10 parts;

[0046] Anti-1010: 0.1 parts;

[0047] Anti-168: 0.1 part;

[0048] PP-g-GMA: 4 parts.

Embodiment 3

[0050] Linear low density polyethylene: 70 parts;

[0051] Carbon black: 25 parts

[0052] Carbon nanotubes: 5 parts;

[0053] NDZ-40: 3 parts;

[0054] Aluminum oxide: 2 parts;

[0055] Zinc oxide: 3 parts;

[0056] Anti-DSTDP: 0.2 parts;

[0057] Anti-168: 0.3 parts;

[0058] PP-g-GMA: 3 parts.

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PUM

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Abstract

The invention discloses a low-resistance PTC (positive temperature coefficient) composite material. The composite material comprises thermoplastic polymers, conductive materials subjected to surface treatment by a coupling agent, inert fillers, compatilizers, antioxidants and a titanate coupling agent. The conductive fillers are carbon black or carbon nano tubes which are subjected to surface treatment by the coupling agent and serve as conductive substances, thus improving the dispersibility of the conductive fillers in a matrix and combinability of the conductive fillers and the matrix, improving the conductivity, reducing the room temperature resistivity of the composite material and improving the property stability of the composite material; therefore the composite material has low resistivity, high PTC strength, good resistance stability and extremely low leakage current and meets the requirements of large current and high voltage.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a low-resistance PTC composite material. technical background [0002] Since the conductive polymer composite material has the characteristics of positive temperature coefficient "PTC" and is connected in parallel with each other, it can automatically adjust the output power and automatically limit the heating temperature according to the temperature change of the heated system. [0003] At present, the polymer-based PTC composite materials commonly used in industrial production are mainly composed of carbon black (CB) filled polyethylene (PE) composite system, and there are also a small amount of metal particles filled polyethylene, or carbon black filled two-component blend polymer. etc., but their development is limited due to high resistivity at room temperature or low withstand voltage. [0004] Carbon black has good conductivity, small parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L27/16C08L51/06C08L51/04C08K13/06C08K9/04C08K3/04C08K7/00
CPCC08K2003/2241C08L23/06C08K2201/001C08K2201/003C08K2201/004C08L23/0815C08L23/0853C08L23/0869C08L27/16C08L2203/20C08L2205/025C08L2205/03C08L2205/035
Inventor 李贻连
Owner ANBANG ELECTRICAL GRP
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