CN103943423A - Manufacturing method for high-voltage self-recovery fuse wire - Google Patents
Manufacturing method for high-voltage self-recovery fuse wire Download PDFInfo
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- CN103943423A CN103943423A CN201410037314.9A CN201410037314A CN103943423A CN 103943423 A CN103943423 A CN 103943423A CN 201410037314 A CN201410037314 A CN 201410037314A CN 103943423 A CN103943423 A CN 103943423A
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Abstract
Disclosed is a manufacturing method for a high-voltage self-recovery fuse wire. The method is characterized in that a positive-temperature factor polymer composite material which is formed through polyethylene and carbon black pellets is placed on a conveyor belt to pass an electronic accelerator and then radiated by electron beams generated by the electronic accelerator, wherein the total radiation dose of the electron beams is 900-1100 KGY, the radiation energy is 2.7-3.2 Mev and the beam current is 8.9-10.1mA; the speed of the positive-temperature factor polymer composite material when passing the electron beams is 14.5-15.5 meters per minute and the passing total coil number is 95-105. The manufacturing method for the high-voltage self-recovery fuse wire adopts the electron beams generated by the electronic accelerator so that the method has unique advantages under a high-dose crosslinking application and provides a unit-time dose rate which far exceeds that of an isotope Gamma source; and the utilization rate of the radiation energy is high and no radiation is generated after operation of the electronic accelerator stops so that the method is significantly safe.
Description
Technical field
The present invention relates to electronic devices and components, be specifically related to a kind of manufacture method of high pressure resettable fuse.
Technical background
PTC(Positive Temperature Coefficient), positive temp coefficient high molecular composite material, be called for short polymer, be self recovery fuse (resettable fuse), the conducting particles (Carbon Black) by the polymer resin (Polymer) through special processing and inside being distributed in forms.Have unique positive temperature coefficient resistor characteristic,, in certain temperature range, the resistance of self can increase along with the rising of temperature.While having served as miscarriage life, high molecular PTC temperature rise, resistance sharply raises, and plays the effect of overcurrent protection, and after over-current state is eliminated, the resistance of high molecular PTC returns to again normal condition.
The resettable fuse product of existing production, the cobalt-60γrays that adopt carry out crosslinking with radiation more, as patent: the disclosed dosage of surface adhesive high molecualr positive temperature coefficient self recovering fuse and manufacture method thereof (patent No.: ZL 02146009.4) is 5-50Mrad electron beam irradiation, but radiation dose is lower, the gel content of cobalt-60γray crosslinking with radiation is lower, the PTC product that production is made can only be applicable to environment under low pressure, longer for the PTC crosslinking with radiation required time that is used in high voltage environment, the oxidation reaction that in air, oxygen participates in is inevitable.Provide under the oxygen-free environment condition of high vacuum in nothing, Long-Duration Exposure makes material surface oxidation serious, and has a strong impact on the stability of polymer.
Utility model content
In order to address the above problem, the present invention develops a kind of manufacture method of the resettable fuse that can be applied to high voltage environment, adopts following technical scheme.
A kind of manufacture method of high pressure resettable fuse, it is characterized in that: on conveyer belt, pass through electron accelerator by being placed on by the positive temp coefficient high molecular composite material of polyethylene and carbon black pelletizing forming, the total radiation dose that electron accelerator produces is 900-1100KGY, emittance is 2.7-3.2Mev, line 8.9-10.1mA electron beam carries out radiation, positive temp coefficient high molecular composite material is 14.5-15.5 rice per minute by the speed of electron beam, and the number of total coils passing through is 95-105 circle.
Product of the present invention adopts electron beam irradiation that electron accelerator produces to have its unique advantage under the crosslinked application of high dose, the unit interval dose rate providing far exceedes isotope γ source, emittance utilance is high, electron accelerator rear radiationless generation out of service, very safe, and more stable than the polymer performance with cobalt-60γray with the crosslinked polymer forming of electronics radiation from machine, be mainly used in hyperbaric environment, as the route protection of client's calculator room equipment, the route protection of telephone exchange (central office), the route protection of telecommunication center (telecom centers), the route protection of external equipment (access equipment) etc.
Brief description of the drawings
Accompanying drawing 1 is temperature-resistance curve chart of experimental group 1 in the present invention's test.
Accompanying drawing 2 is temperature-resistance curve chart of experimental group 2 in the present invention's test.
Accompanying drawing 3 is temperature-resistance curve chart of experimental group 3 in the present invention's test.
Accompanying drawing 4 is temperature-resistance curve chart of experimental group 4 in the present invention's test.
Accompanying drawing 5 is temperature-resistance curve chart of experimental group 5 in the present invention's test.
Accompanying drawing 6 is temperature-resistance curve chart of experimental group 6 in the present invention's test.
Accompanying drawing 7 is temperature-resistance curve chart of experimental group 7 in the present invention's test.
Accompanying drawing 8 is temperature-resistance curve chart of experimental group 8 in the present invention's test.
Embodiment
A kind of manufacture method of high pressure resettable fuse, on conveyer belt, pass through electron accelerator by being placed on by the positive temp coefficient high molecular composite material of polyethylene and carbon black pelletizing forming, the total radiation dose that electron accelerator produces is 900-1100KGY, emittance is 2.7-3.2Mev, line 8.9-10.1mA electron beam carries out radiation, positive temp coefficient high molecular composite material is 14.5-15.5 rice per minute by the speed of electron beam, and the number of total coils passing through is 95-105 circle.
PTC, positive temp coefficient high molecular composite material, is called for short polymer, is self recovery fuse, and the conducting particles by the polymer resin through special processing and inside being distributed in forms.Have unique positive temperature coefficient resistor characteristic,, in certain temperature range, the resistance of self can increase along with the rising of temperature.While having served as miscarriage life, high molecular PTC temperature rise, resistance sharply raises, and plays the effect of overcurrent protection, and after over-current state is eliminated, the resistance of high molecular PTC returns to again normal condition.
Polymer resin is closely strapped in conducting particles crystalloid structure outer (crystallization polymer resin) under normal operation; form chain conduction electric pathway; self-healing fuse is now low resistive state; the heat producing when overcurrent makes polymer resin melt (amorphous structure polymer resin); volume increases rapidly; form high-impedance state, operating current reduces rapidly, thereby circuit is limited and protected.After fault is got rid of, polymer resin is crystallisation by cooling again, volume contraction, and conducting particles forms conductive path again, and self-healing fuse reverts to low resistive state, thereby completes the protection to circuit, need not manually change.
In order to determine optimal processing parameter of the present invention, inventor has carried out a large amount of research test, and for different total radiation doses with contrast by number of total coils, test situation is as follows.
First, positive temperature coefficient polymer composite is carried out to high radiation dose, the parameter that affects radiation dose size is mainly the total radiation dose of electron accelerator generation, the number of total coils that material passes through, in the situation that emittance, line, Negotiation speed are basicly stable, to positive temperature coefficient polymer composite by different radiation doses and the number of turns of passing through, 8 groups of experimental group of concrete following table are tested, each group of total radiation dose passing through, emittance, line, Negotiation speed, distinguish by the number of turns as follows.
Then the positive temp coefficient high molecular composite material of above-mentioned 8 groups of experiments is carried out to the test of temperature-resistance, temperature-resistance curve chart of each experimental group as shown in drawings.
By 8 groups of resistance-temperature profiles shown in the drawings, can find out: the resistance of experimental group 1, experimental group 2, experimental group 3, experimental group 4 these four suites line charts there will be sharply rising near 140 degree, and the huge resistance value changing to more than 100,000 Ω can limitedly realize overcurrent open circuit protection, while having served as miscarriage life, positive temp coefficient high molecular composite temperature rises, resistance sharply raises, and plays the effect of overcurrent protection; Experimental group 5 and experimental group 7 are respectively because total radiation dose is not enough and by number of turns reason very little, cause the degree deficiency of crosslinking with radiation, and in the time of variations in temperature, the sudden change degree of resistance is undesirable, and the resistance value of generation is too little, is not enough to play the effect of overcurrent protection; And experimental group 6 and experimental group 8 are respectively because total radiation dose is too much and too much by the number of turns, cause the degree of crosslinking with radiation too much, in the time of variations in temperature, the sudden change degree of resistance is too responsive, too easily produce huge resistance value, affected the stability of resettable fuse.
The manufacture method of a kind of high pressure the resettable fuse above embodiment of the present invention being provided is described in detail, for one of ordinary skill in the art, according to the thinking of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (1)
1. the manufacture method of a high pressure resettable fuse, it is characterized in that: on conveyer belt, pass through electron accelerator by being placed on by the positive temp coefficient high molecular composite material of polyethylene and carbon black pelletizing forming, the total radiation dose that electron accelerator produces is 900-1100KGY, emittance is 2.7-3.2Mev, line 8.9-10.1mA electron beam carries out radiation, positive temp coefficient high molecular composite material is 14.5-15.5 rice per minute by the speed of electron beam, and the number of total coils passing through is 95-105 circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037314.9A CN103943423A (en) | 2014-01-26 | 2014-01-26 | Manufacturing method for high-voltage self-recovery fuse wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037314.9A CN103943423A (en) | 2014-01-26 | 2014-01-26 | Manufacturing method for high-voltage self-recovery fuse wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103943423A true CN103943423A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410037314.9A Pending CN103943423A (en) | 2014-01-26 | 2014-01-26 | Manufacturing method for high-voltage self-recovery fuse wire |
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| CN (1) | CN103943423A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4560524A (en) * | 1983-04-15 | 1985-12-24 | Smuckler Jack H | Method of manufacturing a positive temperature coefficient resistive heating element |
| CN1730541A (en) * | 2005-08-12 | 2006-02-08 | 陕西师范大学 | Macromolecule material for automatic recovery fuse and its preparation method |
-
2014
- 2014-01-26 CN CN201410037314.9A patent/CN103943423A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4560524A (en) * | 1983-04-15 | 1985-12-24 | Smuckler Jack H | Method of manufacturing a positive temperature coefficient resistive heating element |
| CN1730541A (en) * | 2005-08-12 | 2006-02-08 | 陕西师范大学 | Macromolecule material for automatic recovery fuse and its preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 刘锋: "高温级高分子PTC开关器件材料的研究", 《中国硕士学位论文》 * |
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Application publication date: 20140723 |