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Positive temperature coefficient polymer composition and circuit protection device made therefrom

A positive temperature coefficient, circuit protection technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, to achieve the effect of optimal service life

Inactive Publication Date: 2010-01-06
FUZETEC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the withstand voltage of the positive temperature coefficient polymer composition can be increased by the withstand voltage enhancer, there is still a need to increase its service life (Life Cycle) for high voltage use

Method used

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  • Positive temperature coefficient polymer composition and circuit protection device made therefrom
  • Positive temperature coefficient polymer composition and circuit protection device made therefrom
  • Positive temperature coefficient polymer composition and circuit protection device made therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 8-12 and comparative example 2

[0032] Table 2 shows the different polymer compositions and lifetime test results for Examples 8-12 (with elastomer and particulate metal oxide material) and Comparative Example 2 (with elastomer but without particulate metal oxide material). The test samples were prepared from the polymer compositions listed in Table 2 for the service life test, and the service life was tested by passing a current through the samples at high voltage. Each test sample was prepared by pressurizing and thermoplastically molding the polymer composition to form a positive temperature coefficient sheet element, and then the two opposite sides of the positive temperature coefficient sheet element were connected to two copper foils, so as to Electrodes are formed on the temperature coefficient chip element.

[0033] Table 2

[0034]

[0035]

[0036] # The elastomer used in each example and comparative example is

[0037] The test results show that when the granular metal oxide material is...

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Abstract

A PTC polymer composition contains: (a) a non-elastomeric polymer mixture in an amount from 20 wt % to 80 wt % based on the weight of the polymer composition; (b) a conductive particulate material in an amount from 20 wt % to 60 wt % based on the weight of the polymer composition; (c) a voltage resistance-enhancing agent that contains particulate metal oxide material in an amount from 1 wt % to 30 wt % based on the weight of the polymer composition; and (d) a polymer stabilizer that contains a thermoplastic elastomer in an amount from 1 wt % to 30 wt % based on the weight of the polymer composition.

Description

technical field [0001] The invention relates to a positive temperature coefficient (positive temperature coefficient, PTC) polymer composition, in particular to a positive temperature coefficient with a voltage resistance-enhancing agent (voltage resistance-enhancing agent) and a polymer stabilizer (polymer stabilizer) Polymer composition and circuit protection element made therefrom. Background technique [0002] US Patent No. 6,238,598 discloses a positive temperature coefficient polymer composition comprising a crystalline grafted polymer and a crystalline non-grafted polymer. Adding the graft polymer to the polymer composition can improve the properties of the positive temperature coefficient element made by it, such as tensile strength (peel strength), low contact resistance (contact resistance), low initial resistance (initial resistance), high trip current, and high peak volume resistance. [0003] US Patent No. 6,359,053 discloses a positive temperature coefficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08L23/08C08K7/06C08K3/22C08K3/04C08K3/08
CPCH01B1/24
Inventor 陈继圣古奇浩
Owner FUZETEC TECHNOLOGY CO LTD
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