CN1277440A - Improved thermistor and its production process - Google Patents
Improved thermistor and its production process Download PDFInfo
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- CN1277440A CN1277440A CN 00119519 CN00119519A CN1277440A CN 1277440 A CN1277440 A CN 1277440A CN 00119519 CN00119519 CN 00119519 CN 00119519 A CN00119519 A CN 00119519A CN 1277440 A CN1277440 A CN 1277440A
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- modified model
- tinsel
- high molecular
- temperature
- processing aid
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Abstract
The improved thermister consists of one chip, two pieces of metal foil adhered to two sides of the chip, two flat or lead-like electrodes welded onto the outside surface of the metal foil and one coated insulating layer. Compared with available technology, the present invention has improved material mixing and irradiation process and thus products with relatively lower resistance and high PTC performance.
Description
The present invention relates to conducting high polymers thing composite material is the electronic devices and components of primary raw material, relates in particular to a kind of modified model thermistor and manufacture method thereof.
Usually, in the crystallization of filled conductive particle or hypocrystalline polymer composite, can show positive temperature coefficient PTC (positivetemperaturecoefficient) phenomenon.That is to say that in certain temperature range, the resistivity of self can increase with the rising of temperature.These crystallizations or semi-crystalline polymer comprise polyethylene, polypropylene, Kynoar, polytrifluorochloroethylene etc., and their copolymer.Conducting particles comprises the glass microballoon of carbon black, graphite, carbon fiber, metal dust (as silver powder, copper powder, aluminium powder, nickel powder, stainless steel powder etc.), metal oxide and plating metal on surface etc.When lower temperature, this class conductor presents lower resistivity, is elevated to it more than high molecular polymer fusing point and work as temperature, during just so-called " shutoff " temperature, and the hurried rising of resistivity.This class electric conductor with ptc characteristics has been made thermistor, is applied to the overcurrent protection setting of circuit.In the normal state; electric current in the circuit is less relatively; the thermistor actuator temperature is lower; and when the big electric current that is caused by fault passes through this from the renaturation fuse; its temperature can be elevated to " shutoff " temperature suddenly; cause its resistance value to become very big, so just make circuit be in a kind of approximate " open circuit " state, thereby protected other elements in the circuit.And after fault was got rid of, the temperature of thermistor descended, and its resistance value can return to the low resistance state again.
Thermistor has been widely applied in the various fields such as communication, computer, automobile, Industry Control, electronics.At present the ptc characteristics of the low resistance high molecular PTC material that occurs is relatively poor, that is to say reach " shutoff " temperature after, its PTC intensity is less, can not play good overcurrent protection.
Purpose of the present invention is exactly to provide a kind of modified model thermistor that has than low resistance, higher PTC intensity for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can realize in the following manner: a kind of modified model thermistor, it is by core and be covered on the tinsel on above-mentioned core two sides, the insulating barrier that is welded on sheet on this tinsel outer surface or lead-in wire shape extraction electrode and is coated on outer surface constitutes, perhaps the welding conductive pin constitutes on this tinsel outer surface, perhaps by punching, etching, printing mask, formation such as zinc-plated.
Described core is mixed by high molecular polymer, conductive filler, inorganic filler and processing aid, its prescription following (percetage by weight):
High molecular polymer 35%～60%
Conductive filler 35%～60%
Inorganic filler 0～20%
Processing aid 0.1～5%
High molecular polymer is the blend of a kind of polymer or two or more polymer in the described core component, as polyethylene, polypropylene, Kynoar, polytrifluorochloroethylene, and their copolymer.
Conductive filler is following one or more mixtures of material in the described core component, as carbon black, graphite, carbon fiber, metal dust, metal oxide.
Inorganic filler is the inorganic matter of particle diameter＜50 μ m in the described core component, as magnesium oxide, aluminium oxide, silicon dioxide, potter's clay, talcum powder, calcium carbonate, magnesium hydroxide, aluminium hydroxide.
Processing aid is meant antioxidant, crosslinking accelerator, coupling agent in the described core component, wherein antioxidant can be phenols or aminated compounds, as phenolic antioxidant ANOX70, crosslinking accelerator can be the polyfunctional group unsaturated compound, as triallyl isocyanurate (TAIC), coupling agent can be silane or titanate ester organic compound, as titanium coupling agent TCF.
A kind of manufacture method of modified model thermistor, at first that core component high molecular polymer, conductive filler, inorganic filler and processing aid is mixing under 100～200 ℃ of temperature, granulation is with gamma-rays (Co
60) or electron beam to irradiate crosslinked make masterbatch, irradiation dose 1～10Mrad, mixing once more under 100～200 ℃ of temperature masterbatch, high molecular polymer, conductive filler, inorganic filler and processing aid then, making area with mold pressing or the method extruded is 100～1000cm
2, the sheet material of thick 0.1～1.0mm is compound in tinsel two surfaces of above-mentioned sheet material then on hot press with the method for hot pressing, make composite sheet, and then with this composite sheet with gamma-rays (Co
60) or electron beam to irradiate crosslinked, dosage is 5～100Mrad, also can be earlier core be pasted tinsel after with the said method cross-linking radiation again, and then composite sheet is slit into the small pieces of certain size, sheet or lead-in wire shape metal electrode in the welding, outside coated insulation layer again, perhaps in conductive pin in the above-mentioned tinsel outer surface welding or after by punching, etching, printing mask, technology such as zinc-plated are made surface mount modified model thermistor.
Compared with prior art, advantage of the present invention is to have adopted follow-on mixing procedure, has both had than low resistance, has high PTC intensity again.
Embodiment 1:
Table 1 unit: g
| High density polyethylene (HDPE) | Carbon black | Phenolic antioxidant ANOX70 | Triallyl isocyanurate | Titanium coupling agent TCF |
| ????380 | ????380 | ????2 | ????2 | ????1 |
Annotate: 135 ℃ of high density polyethylene (HDPE) fusing points
Table 2 unit: g
| Masterbatch | High density polyethylene (HDPE) | Carbon black | Phenolic antioxidant ANOX70 | Triallyl isocyanurate | Titanium coupling agent TCF |
| ??400 | ??200 | ??200 | ????2 | ????2 | ????1 |
Annotate: 135 ℃ of high density polyethylene (HDPE) fusing points
Each component in the table 1 is mixing even in banbury under 200 ℃ of temperature, through cooling, pulverize back gamma-rays (Co
60) irradiation, dosage is that 3Mrad makes masterbatch.
Each component in the table 2 is mixing even in banbury under 200 ℃ of temperature, through cooling, place it in after the pulverizing in the pressing mold, pressure 5Mpa is pressed into area 100cm under 180 ℃ of conditions of temperature
2, thick 0.2mm sheet material after smooth, at pressure 5Mpa, is hot-pressed onto the two-sided of core under 180 ℃ of conditions of temperature with the nickel sheet behind the surface coarsening, and 80 ℃ of heat treatments are after 8 hours, with gamma-rays (Co in vacuum drying oven
60) irradiation, dosage is 20Mrad, strike out the small pieces of 5 * 12mm then, and then the thick 0.10mm that burn-ons respectively on the two sides, the sheet metal electrode of 4 * 10mm size, can make the thermistor of the polymer about zero power resistance 0.10 Ω, the ratio of its resistance value and its resistance value in the time of 20 ℃ in the time of 135 ℃
Be not less than 10
5
Embodiment 2:
Prescription is with embodiment 1
Each component in the table 1 is mixing even in banbury under 200 ℃ of temperature, through cooling, pulverize back gamma-rays (Co
60) irradiation, dosage is that 3Mrad makes masterbatch.
Each component in the table 2 is mixing even in banbury under 200 ℃ of temperature, through cooling, place it in after the pulverizing in the pressing mold, pressure 5Mpa is pressed into area 100cm under 180 ℃ of conditions of temperature
2, thick 0.2mm sheet material after smooth, at pressure 5Mpa, is hot-pressed onto the two-sided of core under 180 ℃ of conditions of temperature with the nickel sheet behind the surface coarsening, and 80 ℃ of heat treatments are after 8 hours, with gamma-rays (Co in vacuum drying oven
60) irradiation, dosage is 20Mrad, strike out the small pieces of 6 * 6mm then, and then the thick 0.60mm that burn-ons respectively on the two sides, two conductive pin of 6 * 8mm and 6 * 6mm size, can make the surface mount polymer thermistor device about zero power resistance 0.15 Ω, the ratio of its resistance value and its resistance value in the time of 20 ℃ in the time of 135 ℃
Be not less than 10
5
Embodiment 3～4
Radiation mode changes electron beam irradiation into, and irradiation dose is identical with embodiment 1～2 respectively with other conditions, can obtain 1～2 similar product with embodiment.
Embodiment 5～8
Mixing method is used extruder instead and is extruded, and the control of each section of extruder temperature is set at respectively:
150℃????????160℃????????170℃????????180℃
Other conditions are identical with embodiment 1～4 respectively, obtain the product similar to embodiment 1～4 respectively.
Embodiment 9
Table 3 unit: g
| High density polyethylene (HDPE) | Carbon black | Phenolic antioxidant ANOX70 | Triallyl isocyanurate | Titanium coupling agent TCF |
| ????410 | ????370 | ????2 | ????2 | ????2 |
Annotate: 135 ℃ of high density polyethylene (HDPE) fusing points
Table 4 unit: g
| Masterbatch | High density polyethylene (HDPE) | Carbon black | Magnesium hydroxide | Phenolic antioxidant ANOX70 | Triallyl isocyanurate | Titanium coupling agent TCF |
| ??400 | ????180 | ??180 | ????40 | ????2 | ????2 | ????2 |
Annotate: 135 ℃ of high density polyethylene (HDPE) fusing points
Each component in the table 3 is mixing even in banbury under 200 ℃ of temperature, through cooling, pulverize back gamma-rays (Co
60) irradiation, dosage is that 3Mrad makes masterbatch.
Each component in the table 4 is mixing even in banbury under 200 ℃ of temperature, through cooling, place it in after the pulverizing in the pressing mold, pressure 5Mpa is pressed into area 100cm under 180 ℃ of conditions of temperature
2, thick 0.2mm sheet material after smooth, at pressure 5Mpa, is hot-pressed onto the two-sided of core under 180 ℃ of conditions of temperature with the nickel sheet behind the surface coarsening, and 80 ℃ of heat treatments are after 8 hours, with gamma-rays (Co in vacuum drying oven
60) irradiation, dosage is 20Mrad, strikes out the sequin of φ 6.7mm then, the φ 0.6mm tin-coated copper of burn-oning respectively on the two sides again lead-in wire is sealed the material package envelope with epoxy then, can make and the similar polymer thermistor device of embodiment 1 electrical property.
Embodiment 10
Radiation mode changes electron beam irradiation into, and irradiation dose is identical with embodiment 9 respectively with other conditions, can obtain the 9 similar products with embodiment.
Embodiment 11～12
Mixing method is used extruder instead and is extruded, and the control of each section of extruder temperature is set at respectively:
150℃????????160℃????????170℃????????180℃
Other conditions are identical with embodiment 9～10 respectively, obtain the product similar to embodiment 9～10 respectively.
Embodiment 13
Each component in the table 3 is mixing even in banbury under 200 ℃ of temperature, through cooling, pulverize back gamma-rays (Co
60) irradiation, dosage is that 3Mrad makes masterbatch.
Each component in the table 4 is mixing even in banbury under 200 ℃ of temperature, through cooling, place it in after the pulverizing in the pressing mold, pressure 5Mpa is pressed into area 100cm under 180 ℃ of conditions of temperature
2, thick 0.2mm sheet material after smooth, at pressure 5Mpa, is hot-pressed onto the two-sided of core under 180 ℃ of conditions of temperature with the nickel sheet behind the surface coarsening, and 80 ℃ of heat treatments are after 8 hours, with gamma-rays (Co in vacuum drying oven
60) irradiation, dosage is 20Mrad, strike out the small pieces of 4.5 * 3.3mm then, go out the hole of 0.25mm then with high velocity ram machine at an end of small pieces, again in the Electroless copper in tinsel and hole, clean the back etches away a 0.15mm at the sheet avris far away in hole bonding jumper, adopt screen printing mask, photocuring then, blow the thick tin layer of weldering 0.3mm at the two ends of sheet hot blast again, can make the surface mount polymer thermistor device about zero power resistance 0.4 Ω, the ratio of its resistance value and its resistance value in the time of 20 ℃ in the time of 135 ℃
Be not less than 10
5
Embodiment 14
Radiation mode changes electron beam irradiation into, and irradiation dose is identical with embodiment 13 respectively with other conditions, can obtain the 13 similar products with embodiment.
Embodiment 15～16
Mixing method is used extruder instead and is extruded, and the control of each section of extruder temperature is set at respectively:
150℃????????160℃????????170℃????????180℃
Other conditions are identical with embodiment 13～14 respectively, obtain the product similar to embodiment 13～14 respectively.
Embodiment 15～28
The sheet material irradiation that now is pressed into, then with the nickel sheet behind the surface coarsening after smooth, at pressure 5Mpa, be hot-pressed onto the two-sided of core under 180 ℃ of conditions of temperature, other condition is identical with embodiment 1～14, obtains the product similar to embodiment 1～14 respectively.
Claims (7)
1. modified model thermistor, it is characterized in that, it is by core and be covered on the tinsel on above-mentioned core two sides, the insulating barrier that is welded on sheet on this tinsel outer surface or lead-in wire shape extraction electrode and is coated on outer surface constitutes, perhaps the welding conductive pin constitutes on this tinsel outer surface, perhaps by punching, etching, printing mask, zinc-plated formation.
2. modified model thermistor according to claim 1 is characterized in that described core is mixed by high molecular polymer, conductive filler, inorganic filler and processing aid, its prescription following (percetage by weight):
High molecular polymer 35%～60%
Conductive filler 35%～60%
Inorganic filler 0～20%
Processing aid 0.1～5%
3. modified model thermistor according to claim 2, it is characterized in that, high molecular polymer is the blend of a kind of polymer or two or more polymer in the described core component, as polyethylene, polypropylene, Kynoar, polytrifluorochloroethylene, and their copolymer.
4. modified model thermistor according to claim 2 is characterized in that, conductive filler is following one or more mixtures of material in the described core component, as carbon black, graphite, carbon fiber, metal dust, metal oxide.
5. modified model thermistor according to claim 2, it is characterized in that, inorganic filler is the inorganic matter of particle diameter＜50 μ m in the described core component, as magnesium oxide, aluminium oxide, silicon dioxide, potter's clay, talcum powder, calcium carbonate, magnesium hydroxide, aluminium hydroxide.
6. modified model thermistor according to claim 2, it is characterized in that, processing aid is meant antioxidant, crosslinking accelerator, coupling agent in the described core component, wherein antioxidant can be phenols or aminated compounds, crosslinking accelerator can be the polyfunctional group unsaturated compound, and coupling agent can be silane or titanate ester organic compound.
7. the manufacture method of a modified model thermistor is characterized in that, core component high molecular polymer, conductive filler, inorganic filler and processing aid is mixing under 100～200 ℃ of temperature, and granulation is with gamma-rays (Co
60) or electron beam to irradiate crosslinked make masterbatch, irradiation dose 1～10Mrad, mixing once more under 100～200 ℃ of temperature masterbatch, high molecular polymer, conductive filler, inorganic filler and processing aid then, making area with mold pressing or the method extruded is 100～1000cm
2, the sheet material of thick 0.1～1.0mm is compound in tinsel two surfaces of above-mentioned sheet material then on hot press with the method for hot pressing, make composite sheet, and then with this composite sheet with gamma-rays (Co
60) or electron beam to irradiate crosslinked, dosage is 5～100Mrad, also can be earlier core be pasted tinsel after with the said method cross-linking radiation again, and then composite sheet is slit into the small pieces of certain size, sheet or lead-in wire shape metal electrode in the welding, outside coated insulation layer again is perhaps in conductive pin in the above-mentioned tinsel outer surface welding or after by punching, etching, printing mask, tin plating technique are made surface mount modified model thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001195190A CN1139081C (en) | 2000-07-27 | 2000-07-27 | Improved thermistor and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001195190A CN1139081C (en) | 2000-07-27 | 2000-07-27 | Improved thermistor and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1277440A true CN1277440A (en) | 2000-12-20 |
| CN1139081C CN1139081C (en) | 2004-02-18 |
Family
ID=4587763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001195190A Expired - Fee Related CN1139081C (en) | 2000-07-27 | 2000-07-27 | Improved thermistor and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139081C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306526C (en) * | 2001-08-03 | 2007-03-21 | 雅马哈株式会社 | Method for forming noble metal film pattern |
| CN100382204C (en) * | 2002-10-23 | 2008-04-16 | 深圳市固派电子有限公司 | Surface mounted polymer positive temperature coefficient self recovery fuse and its manufacture |
| CN100411067C (en) * | 2005-02-24 | 2008-08-13 | 深圳市固派电子有限公司 | Macromolecular positive temperature coefficient thermosensitive resistor and method for making same |
| CN100426424C (en) * | 2004-12-21 | 2008-10-15 | 上海长园维安电子线路保护股份有限公司 | Method for manufacturing high-temp PTC thermosensitive resistor |
| CN102427616A (en) * | 2011-09-02 | 2012-04-25 | 西安盖沃热能科技有限公司 | Flame-retarded PTC high polymer self-limiting temperature electric heating film and preparation method thereof |
| CN102701140A (en) * | 2012-05-06 | 2012-10-03 | 西北工业大学 | Method for processing suspended silicon thermistor |
| CN104252935A (en) * | 2013-06-25 | 2014-12-31 | 比亚迪股份有限公司 | Thermistor and method for manufacturing the same |
| CN112165741A (en) * | 2020-09-23 | 2021-01-01 | 江西复萍科技有限公司 | Electric heating plate and preparation method thereof |
-
2000
- 2000-07-27 CN CNB001195190A patent/CN1139081C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306526C (en) * | 2001-08-03 | 2007-03-21 | 雅马哈株式会社 | Method for forming noble metal film pattern |
| CN100382204C (en) * | 2002-10-23 | 2008-04-16 | 深圳市固派电子有限公司 | Surface mounted polymer positive temperature coefficient self recovery fuse and its manufacture |
| CN100426424C (en) * | 2004-12-21 | 2008-10-15 | 上海长园维安电子线路保护股份有限公司 | Method for manufacturing high-temp PTC thermosensitive resistor |
| CN100411067C (en) * | 2005-02-24 | 2008-08-13 | 深圳市固派电子有限公司 | Macromolecular positive temperature coefficient thermosensitive resistor and method for making same |
| CN102427616A (en) * | 2011-09-02 | 2012-04-25 | 西安盖沃热能科技有限公司 | Flame-retarded PTC high polymer self-limiting temperature electric heating film and preparation method thereof |
| CN102701140A (en) * | 2012-05-06 | 2012-10-03 | 西北工业大学 | Method for processing suspended silicon thermistor |
| CN102701140B (en) * | 2012-05-06 | 2014-11-26 | 西北工业大学 | Method for processing suspended silicon thermistor |
| CN104252935A (en) * | 2013-06-25 | 2014-12-31 | 比亚迪股份有限公司 | Thermistor and method for manufacturing the same |
| CN112165741A (en) * | 2020-09-23 | 2021-01-01 | 江西复萍科技有限公司 | Electric heating plate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1139081C (en) | 2004-02-18 |
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Owner name: SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO., L Free format text: FORMER NAME: WEIAN THERMOELECTRICAL MATERIALS CO LTD, SHANGHAI |
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Address after: 200437 No. 99, Handan Road, Shanghai Patentee after: Shanghai Changyuan Wayon Circuit Protection Co., Ltd. Address before: 200437 No. 99, Handan Road, Shanghai Patentee before: Weian Thermoelectrical Materials Co., Ltd., Shanghai |
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