CN101556849A - Macromolecular positive temperature coefficient thermosensitive resistor and manufacturing method thereof - Google Patents
Macromolecular positive temperature coefficient thermosensitive resistor and manufacturing method thereof Download PDFInfo
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- CN101556849A CN101556849A CNA2009100516141A CN200910051614A CN101556849A CN 101556849 A CN101556849 A CN 101556849A CN A2009100516141 A CNA2009100516141 A CN A2009100516141A CN 200910051614 A CN200910051614 A CN 200910051614A CN 101556849 A CN101556849 A CN 101556849A
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Abstract
The invention relates to a macromolecular positive temperature coefficient thermosensitive resistor which comprises a sheet core, metal foils adhering on two sides of the sheet core, and sheet or lead-shaped metal electrodes welded on outer surfaces of the metal foils; the core is blended by macromolecule polymer, conductive fillings, inorganic fillings and processing material which are distributed according to weight percentage as follows: 35-65% of macromolecule polymer, 35-65% of conductive fillings, 0-20% of inorganic fillings and 0.1-5% of processing material. The invention is characterized in that the macromolecular positive temperature coefficient thermosensitive resistor has low cost; ball grinder pre-mixing process is employed in the technique to improve evenness of room-temperature resistance value of the macromolecular positive temperature coefficient thermosensitive resistor and uniformity of resistance lift after performing current resisting, voltage resisting and the like, thereby improving rate of pass of the product.
Description
Technical field
The present invention relates to the high molecular polymer composite material is the electronic devices and components of primary raw material, relates in particular to a kind of high molecular positive temperature coefficient thermal sensitive resistor and manufacture method thereof.
Background technology
The crystallization of filled conductive particle or hypocrystalline polymer composite can show positive temperature coefficient PTC (positive temperature coefficient) phenomenon.That is to say that in certain temperature range, the resistivity of himself can increase with the rising of temperature.These crystallizations or semi-crystalline polymer comprise polyethylene, polypropylene, Kynoar etc., and their copolymer.Conducting particles comprises carbon black, graphite, carbon fiber, metal dust 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, and during just so-called " shutoff " temperature, resistivity sharply raises.This class composite material with ptc characteristics has been made thermistor, is applied to the overcurrent protection setting of circuit.Usually under the 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 resettable 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 element 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.
High molecular PTC thermistor has been widely applied to the line protection in the various fields such as communication, computer, automobile, electronics.And, mostly have the inconsistent shortcoming of change in resistance in room temperature resistance wider distribution and the use by the high molecular PTC thermistor that existing manufacture method is produced, and will influence the operate as normal of electric equipment when serious, rate of finished products is lower in addition.A kind of method of new manufacturing high molecular positive temperature coefficient thermal sensitive resistor is provided in order to overcome the problem that above-mentioned technology exists.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high molecular positive temperature coefficient thermal sensitive resistor, and the resistance change rate after the anti-stream of its room temperature resistance value and product, voltage endurance capability, the anti-long-term behaviour is homogeneous more.
Another technical problem to be solved by this invention is to provide the manufacture method of above-mentioned high molecular positive temperature coefficient thermal sensitive resistor, improves its product percent of pass.
The present invention solves the problems of the technologies described above the technical scheme of being taked: a kind of high molecular positive temperature coefficient thermal sensitive resistor, it by the sheet core and be covered on above-mentioned sheet core two sides tinsel, be welded on this tinsel outer surface sheet or the lead-in wire shape metal electrode constitute, described sheet core is mixed by high molecular polymer, conductive filler, inorganic filler and processing aid, and percentage composition is counted by weight:
High molecular polymer 35～65%
Conductive filler 35～65%
Inorganic filler 0～20%
Processing aid 0.1～5%, wherein,
Described high molecular polymer is the blend of one or more polymer in polyethylene, polypropylene, Kynoar or its copolymer;
Conductive filler is following one or more mixtures of material in the described core component, is carbon black, graphite, carbon fiber, metal dust, as in nickel powder, the metal oxide one or more;
Inorganic filler is the inorganic matter that particle diameter is not more than 50 μ m in the described core component, is one or more the mixture in magnesium oxide, aluminium oxide, silicon dioxide, potter's clay, talcum powder, calcium carbonate, magnesium hydroxide, the aluminium hydroxide.
Concrete, the consumption of high molecular polymer can be 35,40,45,50,55,60 or 65%; The consumption of conductive filler can be 35,40,45,50,55,60 or 65%; The consumption of inorganic filler can be 0,5,10,15 or 20%; The consumption of processing aid can be 0.1,0.5,1,1.5,2,3,4 or 5%.
On the basis of such scheme, described processing aid is antioxidant, crosslinking accelerator and coupling agent, wherein, antioxidant is phenols or aminated compounds, as phenolic antioxidant ANOX20, crosslinking accelerator is the polyfunctional group unsaturated compound, as triallyl isocyanurate (TAIC), coupling agent is silane or titanate ester organic compound, as TC series titanate coupling agent.
Compare with existing high molecular PTC thermistor, each component is easy to get, and cheap.
At the manufacture method of above-mentioned high molecular positive temperature coefficient thermal sensitive resistor, by the core two sides paste tinsel and on this tinsel outer surface the welding sheet or the lead-in wire shape metal electrode make, comprise the steps:
The first step: the core component of high molecular positive temperature coefficient thermal sensitive resistor is comprised high molecular polymer, conductive filler and processing aid premix in ball mill, rotational speed of ball-mill 180～280rpm, ball milling time 10～120min makes premix;
Second step: with premix double screw extruder extruding pelletization, particle is extruded with single screw extrusion machine and is made the sheet core, utilizes integral machine that tinsel is compound in two surfaces up and down of sheet core simultaneously, and making area is 100～1000cm
2, the composite sheet of thick 0.1～1.0mm;
The 3rd step: composite sheet is washed into the small pieces of certain size, and the metal electrode of the sheet or the shape that goes between carries out cross-linking radiation to composite sheet again in the welding, makes high molecular positive temperature coefficient thermal sensitive resistor.
Concrete, the rotational speed of ball-mill of premix process can be 180,200,220,240,260 or 280rpm; The ball milling time can be 10,2,30,40,50,60,70,80,90,100,110 or 120min, and further preferred 30～80min.
Compare with existing high molecular PTC thermistor manufacture method, the present invention is owing to adopted the technology of ball mill premix, make various fillers more be evenly dispersed in the high polymer, thereby can make more homogeneous of room temperature resistance value, the high molecular positive temperature coefficient thermal sensitive resistor that rate of finished products is higher.
On the basis of such scheme, in second step, double screw extruder is divided into nine batch mixing sections, be followed successively by from inlet to the temperature that exports the batch mixing section: 150～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 150～180 ℃, the twin-screw rotating speed is 200～280rpm; The temperature of single screw extrusion machine is 140～180 ℃, and single screw speed is 5～30rpm.
On the basis of such scheme, in the 3rd step, described cross-linking radiation adopts gamma-rays (Co
60) or electron beam, dosage is 5～100Mrad.
The invention has the beneficial effects as follows:
The present invention is cheap, owing in technology, introduced the ball milling premixing process, improved the high molecular positive temp degree that makes enumerate in full detail thermistor room temperature resistance value homogeneity, anti-stream is withstand voltage etc., and anti-various performances are waited the consistency that the back rises resistance, thereby improved the qualification rate of product.
Embodiment
Two exemplary embodiments of the present invention are as follows:
Embodiment 1
The high molecular positive temperature coefficient thermal sensitive resistor core comprises following component:
| High density polyethylene (HDPE) | Carbon black | Phenolic antioxidant ANOX20 | Triallyl isocyanurate | Titanate coupling agent TCF |
| 450g | 450g | 2g | 2g | 1g |
Annotate: the high density polyethylene (HDPE) fusing point is 130 ℃
The manufacture method of high molecular positive temperature coefficient thermal sensitive resistor, by the core two sides paste tinsel and on this tinsel outer surface the welding sheet or the lead-in wire shape metal electrode make, comprise the steps:
The first step: press prescription with each component premix in ball mill, rotational speed of ball-mill 270rpm, ball milling time 40min makes premix;
Second step: with premix double screw extruder extruding pelletization, the temperature of each the batch mixing section of double screw extruder from inlet to outlet is in regular turn: 180 ℃, and 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 173 ℃, the twin-screw rotating speed is 260rpm; Particle is extruded with single screw extrusion machine and is made the sheet core, and the temperature of single screw extrusion machine is 150 ℃, and single screw speed is 20rpm; Utilize all-in-one that tinsel is compound in two surfaces up and down of sheet core when making the sheet core, making area is 100cm
2, the composite sheet of thick 0.2mm;
The 3rd step: composite sheet is washed into 3.6mm * 10mm small pieces, and the metal electrode of sheet or lead-in wire shape carries out electron beam to irradiate crosslinked to composite sheet again in the welding, and dosage is 20Mrad, makes high molecular positive temperature coefficient thermal sensitive resistor.
The room temperature resistance of the high molecular positive temperature coefficient thermal sensitive resistor that makes with the inventive method is 30～50mohms.And not adopting the ball milling premixing process, the room temperature resistance of the product that makes under the identical situation of other conditions is 27～55mohms.
Embodiment 2
The high molecular positive temperature coefficient thermal sensitive resistor core comprises following component:
| High density polyethylene (HDPE) | Carbon black | Calcium carbonate | Phenolic antioxidant ANOX20 | Triallyl isocyanurate | Titanate coupling agent TCF |
| 450g | 400g | 50g | 2g | 2g | 1g |
Annotate: the high density polyethylene (HDPE) fusing point is 130 ℃
The manufacture method of high molecular positive temperature coefficient thermal sensitive resistor, the core component of high molecular positive temperature coefficient thermal sensitive resistor is high molecular polymer, conductive filler, inorganic filler and processing aid, manufacture method comprises the steps:
The first step: press prescription with each component premix in ball mill, rotational speed of ball-mill 230rpm, ball milling time 60min makes premix;
Second step: with premix double screw extruder extruding pelletization, the temperature of each the batch mixing section of double screw extruder from inlet to outlet is in regular turn: 180 ℃, and 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 175 ℃, 173 ℃, the twin-screw rotating speed is 260rpm; Particle is extruded with single screw extrusion machine and is made the sheet core, and the temperature of single screw extrusion machine is 150 ℃, and single screw speed is 20rpm; Utilize all-in-one that tinsel is compound in two surfaces up and down of sheet core when making the sheet core, making area is 100cm
2, the composite sheet of thick 0.2mm;
The 3rd step: composite sheet is washed into 3.6mm * 10mm small pieces, and the metal electrode of sheet or lead-in wire shape carries out electron beam to irradiate crosslinked to composite sheet again in the welding, and dosage is 20Mrad, makes high molecular positive temperature coefficient thermal sensitive resistor.
The room temperature resistance of the high molecular positive temperature coefficient thermal sensitive resistor that makes with the inventive method is 30～50mohms.And not adopting the ball milling premixing process, the room temperature resistance of the product that makes under the identical situation of other conditions is 25～60mohms.
Claims (5)
1, a kind of high molecular positive temperature coefficient thermal sensitive resistor, it by the sheet core and be covered on above-mentioned sheet core two sides tinsel, be welded on this tinsel outer surface sheet or the lead-in wire shape metal electrode constitute, it is characterized in that: described sheet core is mixed by high molecular polymer, conductive filler, inorganic filler and processing aid, and percentage composition is counted by weight:
High molecular polymer 35～65%
Conductive filler 35～65%
Inorganic filler 0～20%
Processing aid 0.1～5%,
Wherein, described high molecular polymer is the blend of one or more polymer in polyethylene, polypropylene, Kynoar or its copolymer;
Conductive filler is following one or more mixtures of material in the described core component, is in carbon black, graphite, carbon fiber, metal dust, the metal oxide one or more;
Inorganic filler is the inorganic matter that particle diameter is not more than 50 μ m in the described core component, is one or more the mixture in magnesium oxide, aluminium oxide, silicon dioxide, potter's clay, talcum powder, calcium carbonate, magnesium hydroxide, the aluminium hydroxide.
2, high molecular positive temperature coefficient thermal sensitive resistor according to claim 1, it is characterized in that: described processing aid is antioxidant, crosslinking accelerator and coupling agent, wherein, antioxidant is phenols or aminated compounds, crosslinking accelerator is the polyfunctional group unsaturated compound, and coupling agent is silane or titanate ester organic compound.
3, at the manufacture method of claim 1 or 2 described high molecular positive temperature coefficient thermal sensitive resistors, by the core two sides paste tinsel and on this tinsel outer surface the welding sheet or the lead-in wire shape metal electrode make, it is characterized in that comprising the steps:
The first step: with core component high molecular polymer, conductive filler, inorganic filler and processing aid premix in ball mill of high molecular positive temperature coefficient thermal sensitive resistor, rotational speed of ball-mill 180～280rpm, ball milling time 10～120min makes premix;
Second step: with premix double screw extruder extruding pelletization, particle is extruded with single screw rod and is made the sheet core, simultaneously tinsel is compound in two surfaces up and down of sheet core, and making area is 100～1000cm
2, the composite sheet of thick 0.1～1.0mm;
The 3rd step: composite sheet is washed into small pieces, and the metal electrode of sheet or lead-in wire shape carries out cross-linking radiation to composite sheet again in the welding, makes high molecular positive temperature coefficient thermal sensitive resistor.
4, the manufacture method of high molecular positive temperature coefficient thermal sensitive resistor according to claim 3 is characterized in that: in second step, double screw extruder is divided into nine batch mixing sections, be followed successively by from charging aperture to the temperature that exports the batch mixing section: 150～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 155～185 ℃, 150～180 ℃, the twin-screw rotating speed is 200～280rpm; The temperature that single screw rod is extruded is between 140～180 ℃, and single screw speed is 5～30rpm.
5, the manufacture method of high molecular positive temperature coefficient thermal sensitive resistor according to claim 3 is characterized in that: in the 3rd step, described cross-linking radiation adopts gamma-rays (Co
60) or electron beam, dosage is 5～100Mrad.
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| CNA2009100516141A CN101556849A (en) | 2009-05-20 | 2009-05-20 | Macromolecular positive temperature coefficient thermosensitive resistor and manufacturing method thereof |
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| CNA2009100516141A CN101556849A (en) | 2009-05-20 | 2009-05-20 | Macromolecular positive temperature coefficient thermosensitive resistor and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930819A (en) * | 2010-01-15 | 2010-12-29 | 上海长园维安电子线路保护股份有限公司 | Positive temperature coefficient thermosensitive resistor for overtemperature and overcurrent protection of secondary battery |
| CN101975191A (en) * | 2010-10-12 | 2011-02-16 | 浙江大学 | Temperature self-controlled fan blade |
| CN102190830A (en) * | 2010-03-12 | 2011-09-21 | 北京化工大学 | High-temperature low-carbon-black-content polymer-based PTC composite material and preparation method thereof |
| CN102477226A (en) * | 2010-11-24 | 2012-05-30 | 沈阳建筑大学 | High current resistant thermistor polymer composite material and preparation method thereof |
| CN107556669A (en) * | 2017-09-26 | 2018-01-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of carbon doping thermistor |
| CN108485034A (en) * | 2018-04-23 | 2018-09-04 | 合肥羿振电力设备有限公司 | A kind of thermistor composite material and preparation method thereof |
| CN108822492A (en) * | 2018-05-23 | 2018-11-16 | 江苏时瑞电子科技有限公司 | A kind of macromolecular PTC thermistor material and preparation method thereof |
| CN108863160A (en) * | 2018-07-06 | 2018-11-23 | 句容市博远电子有限公司 | A kind of preparation method of the Ni-based thermistor material of NTC |
| CN112094449A (en) * | 2020-09-16 | 2020-12-18 | 东莞市竞沃电子科技有限公司 | Curie point adjustable PTC polymer conductive composite material and preparation method thereof |
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2009
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930819A (en) * | 2010-01-15 | 2010-12-29 | 上海长园维安电子线路保护股份有限公司 | Positive temperature coefficient thermosensitive resistor for overtemperature and overcurrent protection of secondary battery |
| CN102190830A (en) * | 2010-03-12 | 2011-09-21 | 北京化工大学 | High-temperature low-carbon-black-content polymer-based PTC composite material and preparation method thereof |
| CN101975191A (en) * | 2010-10-12 | 2011-02-16 | 浙江大学 | Temperature self-controlled fan blade |
| CN102477226A (en) * | 2010-11-24 | 2012-05-30 | 沈阳建筑大学 | High current resistant thermistor polymer composite material and preparation method thereof |
| CN102477226B (en) * | 2010-11-24 | 2014-01-15 | 沈阳建筑大学 | High current resistant thermistor polymer composite material and preparation method thereof |
| CN107556669A (en) * | 2017-09-26 | 2018-01-09 | 苏州南尔材料科技有限公司 | A kind of preparation method of carbon doping thermistor |
| CN108485034A (en) * | 2018-04-23 | 2018-09-04 | 合肥羿振电力设备有限公司 | A kind of thermistor composite material and preparation method thereof |
| CN108822492A (en) * | 2018-05-23 | 2018-11-16 | 江苏时瑞电子科技有限公司 | A kind of macromolecular PTC thermistor material and preparation method thereof |
| CN108863160A (en) * | 2018-07-06 | 2018-11-23 | 句容市博远电子有限公司 | A kind of preparation method of the Ni-based thermistor material of NTC |
| CN108863160B (en) * | 2018-07-06 | 2020-08-25 | 句容市博远电子有限公司 | Preparation method of NTC nickel-based thermistor material |
| CN112094449A (en) * | 2020-09-16 | 2020-12-18 | 东莞市竞沃电子科技有限公司 | Curie point adjustable PTC polymer conductive composite material and preparation method thereof |
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Address after: Seven road 201202 Shanghai City Airport Town Shiwan No. 1001 Applicant after: Shanghai Changyuan Wayon Circuit Protection Co., Ltd. Address before: Seven road 201202 Shanghai City Airport Town Shiwan No. 1001 Applicant before: Shanghai Changyuan Wayon Circuit Protection Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI CHANGYUAN WEIAN ELECTRONIC LINE PROTECTION CO., LTD. TO: SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO., LTD. |
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Application publication date: 20091014 |