High voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and manufacturing method thereof

A thermistor and polymer technology, applied in the direction of resistance terminals/electrodes, resistors with positive temperature coefficients, etc., can solve the problems of increased process, increased cost, low efficiency, etc., to improve performance, reduce breakdown, reduce cost effect

Inactive Publication Date: 2013-04-03
厦门莱纳电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also the problem of increasing the process, low efficiency and cost increase in this way

Method used

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  • High voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and manufacturing method thereof
  • High voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and manufacturing method thereof
  • High voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and manufacturing method thereof

Examples

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specific example

[0047] Below in conjunction with example the present invention is described in further detail, but the present invention is not limited to these examples.

[0048] Put HDPE, carbon black, magnesium hydroxide, cross-linking agent and other additives into the internal mixer for 15 minutes, take it out and press it into a core material with a thickness of 2.3 mm at a temperature of 180 degrees with a flat vulcanizer, and sandwich it between two pieces of single-sided In the roughened nickel-plated copper foil electrode, use a flat vulcanizer under the conditions of 180 degrees and 50MPa pressure to compound the copper foil electrode on both sides of the core material, and press it into a 2 mm thick PPTC sheet.

[0049] The cutting knife is transformed with a 2 mm thick disc milling cutter, and the circumferential knife edge is ground into two oblique angles of 45 degrees with the center line of the plane with a tool grinder.

[0050] Install the cutting knife on the milling machi...

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Abstract

The invention discloses a high voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and a manufacturing method thereof. The thermistor consists of a high molecular core material with high PTC characteristic and metal foil electrode layers attached to both sides of the core material. A bevel or an arc-shaped face can be formed in the periphery of a sheet attached to the metal foil electrode layers by way of cutting the sheet with tools with different tool bits in shape. The creep distance between two copper foil electrodes is longer than the original linear distance, so that the withstand voltage performance of the product is improved, the arc discharge between the electrodes is effectively reduced, and probability of abnormal situations such as breakdown and combustion is effectively reduced. The bevel or the arc-shaped face is directly cut on the high voltage resisting level high molecular PTC thermistor sheet, so that the manufacturing process is simple and meanwhile, no additional manufacturing steps are increased, the cost is lowered and the performance is improved, and the thermistors can be quickly and economically produced in a large scale.

Description

technical field [0001] The invention mainly relates to an electronic component or device with a positive temperature coefficient resistivity polymer, in particular to a high-voltage-resistant polymer PTC thermistor and a manufacturing method thereof. Background technique [0002] The resistance of conductive composite materials with positive temperature coefficient (Positive Temperature Coefficient, PTC) characteristics is sensitive to temperature changes, and has been widely used in overcurrent protection components or circuit components. Since the resistance of the PTC conductive composite material can maintain a very low value at normal temperature, the circuit can operate normally. In an approximate "open circuit" state, the circuit current is limited to an extremely low level to achieve the purpose of protecting the circuit. And when the fault is eliminated, the temperature of the thermistor drops, and its resistance value can return to a low resistance state. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02H01C1/14
Inventor 黄恩琳黄子轩
Owner 厦门莱纳电子有限公司
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