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Macromolecular thermosensitive resistor and method for making same

A thermistor and polymer technology, applied to resistors with positive temperature coefficients, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems affecting the normal operation of electrical equipment and inconsistent resistance change rates, and achieve The cross-linked structure is uniform and stable, the product quality is good, and the effect of improving the current resistance

Inactive Publication Date: 2008-11-26
深圳市长园维安电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the practical application of polymer thermistors, it often occurs that the resistance change rate is inconsistent during use, which will directly affect the normal operation of electrical equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1 Weigh 380 grams of polymer-high-density polyethylene, 350 grams of conductive material-carbon black, 70 grams of inorganic filler-magnesium hydroxide with a particle size of 10 μm and 104 μm, antioxidant-β-(3,5-di Tert-butyl-4-hydroxyphenyl) octadecyl carbonyl propionate Irganox1076 is 12 grams, coupling agent-titanate 201 is 20 grams, each component is placed in the twin-screw extruder and mixed evenly, extruded The temperature of each section of the machine is set at 160°C, 170°C, 180°C, and 190°C, extruded, pulled, and hot-pressed into an area of ​​130cm under the conditions of pressure 6Mpa and temperature 185°C 2 A sheet with a thickness of 0.8mm is irradiated with a dose of 42 Mrad (Mrad) electron beams. Under the conditions of a pressure of 6Mpa and a temperature of 185°C, the nickel foil that has been roughened on one side is hot-pressed onto the sheet. Irradiate with a dose of 12Mrad, punch it into a small piece of Φ10.7, and then solder a Φ0.8mm tinn...

Embodiment 2

[0012] Example 2 Weigh 280 grams of polymer-high-density polyethylene, 110 grams of ethylene / acrylic acid copolymer, 150 grams of conductive material-copper powder, 450 grams of carbon black, and inorganic filler-aluminum hydroxide with particle sizes of 10 μm and 104 μm respectively 50 grams, antioxidant-beta-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl carbonic acid ester Irganox1076 is 2 grams, coupling agent-titanate 201 is 4 grams, will Each component is mixed evenly in the twin-screw extruder. The temperature of each section of the extruder is set at 160°C, 170°C, 180°C, and 190°C. Next, heat press into an area of ​​130cm 2 A sheet with a thickness of 0.4mm is irradiated with a dose of 15Mrad electron beams. Under the conditions of a pressure of 6Mpa and a temperature of 185°C, the single-sided roughened nickel foil is hot-pressed onto the sheet, and a dose of 40Mrad electron beams is irradiated. Form into a small piece of Φ6.7, then solder Φ0.6mm tinned copper wire on...

Embodiment 3

[0013] Example 3 Weigh 300 grams of polymer-low-density polyethylene, conductive material-copper powder 100 grams, nickel powder 20 grams, carbon black 420 grams, inorganic filler-clay with a particle size of 10 μm, and antimony trioxide 104 μm are 40 grams respectively And 60 grams, antioxidant-beta-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl carbonic acid ester Irganox1076 is 1 gram, coupling agent-titanate 201 is 2 grams, The mixing method was changed to internal mixer processing, the temperature was 170°C, and the sheet was opened for refining, and the other conditions were the same as in Example 1, respectively, to obtain products similar to those in Example 1-2, and the same method was used for detection, power frequency current resistance test: The resistance change rate is 19% after 100 current shocks. Power frequency voltage resistance test: 240 minutes of power on, the resistance change rate is 24%.

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PUM

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Abstract

This invention discloses a macromolecule heat sensitive resistance and its process method, whose base slice element and weight percentage as the following: polymer 30-65; conductive stuff 30-60; inorganic stuff10-40; processed assistant agent 0.2-5, wherein, the conductive stuff is nickel powder, copper powder or carbon and the inorganic stuff is metal oxidation and the processed assistant agent comprises anti-oxidant agent and the couple agent mixture with the weight proportion as 1: 1.5-2.5, wherein, the couple agent is titanium acid ester or silicon alkyl compound composed of base slice and slice electrode and the lead wire electrode welded on the electrode surface and the insulation layer covered on the outer surface.

Description

technical field [0001] The invention relates to a resistor and a manufacturing method thereof, in particular to a polymer thermistor and a manufacturing method thereof. Background technique [0002] It is well known that adding conductive particles to crystalline or semi-crystalline polymers can exhibit positive temperature coefficient (PTC) characteristics: the resistivity can increase rapidly as the temperature rises in a relatively short temperature range. Since the polymer PTC thermistor has a low initial resistance value, and the resistance value increases rapidly by more than 5 orders of magnitude in a relatively short period of time, it can effectively prevent circuit failures, such as short circuit, lap connection, induction, etc. , The large current generated in the circuit can damage other important components in the circuit. When the circuit fault is eliminated, the temperature of the thermistor drops, and its resistance value returns to a low resistance state. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H01B1/20
Inventor 孙晗龙陈奇星查季九覃迎峰
Owner 深圳市长园维安电子有限公司
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