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A kind of ptc core material with positive temperature coefficient characteristic and its manufacture and application

A positive temperature coefficient, core material technology, applied in the direction of resistors with positive temperature coefficients, current response resistors, etc., can solve the problems that affect the metal foil electrode coating effect, reduce the electrical performance of the product, etc., and meet the requirements of the preparation Effects of short time, increased production speed, and increased resistance reproducibility

Active Publication Date: 2016-05-18
上海神沃电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not very suitable for the processing of polymer PTC materials, because the polymer PTC materials are best cross-linked after the metal foil electrode is applied, otherwise it will affect the effect of the metal foil electrode and reduce the electrical performance of the product

Method used

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  • A kind of ptc core material with positive temperature coefficient characteristic and its manufacture and application
  • A kind of ptc core material with positive temperature coefficient characteristic and its manufacture and application
  • A kind of ptc core material with positive temperature coefficient characteristic and its manufacture and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The formula of the present embodiment is as shown in Table 1 and Table 2. The difference from the comparative example is that the peroxide is added during the plasticization of the open mill, and the volume percentage of the peroxide is 2%, and then stretched to a length of 20 cm and a width of 10 cm. , after cooling, put it into a mold with a middle thickness of 0.35-0.37mm, place a nickel foil on the upper and lower surfaces of the PTC plate, then place a polyester film cloth on the upper and lower layers, and then press the steel plate, preheat for 5 minutes, and then press for 10 minutes, the operating pressure is 100kg / cm 2 , the temperature is 160°C, and a PTC core material with positive temperature coefficient characteristics is formed after this first pressing. Then the PTC core material is cut into a rectangle with a length of 20 cm and a width of 10 cm, and then punched into a chip with a length of 4 mm and a width of 3 mm by a punching machine, and then welds...

Embodiment 2

[0049] The formula of this embodiment is shown in Table 1 and Table 2. The difference from the comparative example is that peroxide is added during plasticization of the open mill, and its volume percentage is 2%, and then drawn into 10*20mm 2 Thin sheet, after cooling, put it into a mold with a middle thickness of 0.35-0.37mm, put a nickel foil on the upper and lower surfaces of the PTC sheet, and then put a polyester film cloth on the upper and lower layers, and then press the steel plate, preheat for 5 minutes, and then press together 10 minutes, the operating pressure is 100kg / cm 2 , the temperature is 170°C, and a PTC core material with positive temperature coefficient characteristics is formed after the first pressing. Then the PTC core material is cut into a rectangle with a length of 20 cm and a width of 10 cm, and then punched into a chip with an area of ​​4 mm and a width of 3 mm with a mold, and then welding pins with a length of 16 mm and a width of 2.5 mm and a th...

Embodiment 3

[0051] The formula of the present embodiment is as shown in Table 1 and Table 2. The difference with the comparative example is that the peroxide is added during the plasticization of the open mill, and its volume percentage is 4%, and then stretched into a long 20cm wide 10cm sheet, After cooling, put it into a mold with a middle thickness of 0.35-0.37mm. Put a nickel foil on the upper and lower surfaces of the PTC plate, and then put a polyester film cloth on the upper and lower layers, and then press the steel plate. Preheat for 5 minutes, and then press for 10 minutes. , the operating pressure is 100kg / cm 2 , the temperature is 160°C, and a PTC core material with positive temperature coefficient characteristics is formed after this first pressing. Then the PTC core material is cut into a rectangle with a length of 20cm and a width of 10cm, and then punched into a chip with an area of ​​4mm and a width of 3mm with a mold, and then welding pins at both ends of the chip with ...

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Abstract

The invention provides a PTC (positive temperature coefficient) core material with positive temperature coefficient characteristics and a preparation method and an application thereof. The PTC core material is used for an over-current protection element and formed by composition of two metallic foil electrodes and polymer positive temperature coefficient conductive materials sandwiched between the two metallic foil electrodes, the polymer positive temperature coefficient materials are formed by composition of at least following materials as components, by volume percentage, 25.5%-29.5% of high polymer, 60%-72% of conductive filler, 0.05%-5% of peroxide crosslinker and 0.5%-10% of coupler, and the conductive filler, the peroxide crosslinker and the coupler are uniformly distributed in the high polymer. The PTC core material is small in resistance change, quite stable in high-and-low cycle life and environmental test, high in efficiency and low in cost, R100 / R0 is only 2-9 times, current characteristics of the over-current protection element are improved, and disadvantages of proneness to degradation, generation of internal stress and the like caused by radiation crosslinking are avoided.

Description

technical field [0001] The invention relates to a polymer positive temperature coefficient conductive material and its preparation and application, in particular to a PTC core material with a positive temperature coefficient characteristic and its corresponding preparation and application. Background technique [0002] Functional polymer materials are currently a hot spot in material science research, and polymer composite conductive materials with PTC characteristics are among the best. So far, the academic and industrial circles are actively researching and developing it. The so-called polymer PTC composite conductive material is a polymer composite conductive material with PTC (positive temperature coefficient "positive temperature coefficient") resistance characteristics. That is to say, within a certain temperature range, the resistivity of the conductive material itself will increase with the increase of temperature. This polymer PTC material is compounded by polymer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H01C7/13
Inventor 张爱丽史宇正任井柱侯李明
Owner 上海神沃电子有限公司
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