CN102623116A - High-voltage-resistant subsize polymer PTC thermistor with high lightning level and preparation method thereof - Google Patents
High-voltage-resistant subsize polymer PTC thermistor with high lightning level and preparation method thereof Download PDFInfo
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- CN102623116A CN102623116A CN2011104583142A CN201110458314A CN102623116A CN 102623116 A CN102623116 A CN 102623116A CN 2011104583142 A CN2011104583142 A CN 2011104583142A CN 201110458314 A CN201110458314 A CN 201110458314A CN 102623116 A CN102623116 A CN 102623116A
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Abstract
The invention relates to a high-voltage-resistant subsize polymer PTC thermistor with a high lightning level and a preparation method thereof. The high-voltage-resistant subsize polymer PTC thermistor with a high lightning level consists of a polymer PTC core material, metal foil adhered onto two surfaces of the core material, extraction electrodes welded onto the external surface of the metal foil and externally coated insulating layers, wherein the PTC core material is prepared by mixing a high polymer, carbon black, a heat conducting filling material and a processing aid, and the weight percent of the above-mentioned components is as follows: 25 to 60% of the high polymer, 20 to 45% of carbon black and 25 to 50% of the heat conducting filling material, with the balance being the processing aid. The size of the high-voltage-resistant subsize polymer PTC thermistor with a high lightning level provided in the invention is far less than the size of commercially available products of a same kind in China, and the PTC thermistor can stand high voltage and has a lightning level far higher than that of products of a same kind in China.
Description
Technical field
The present invention relates to a kind of is the electronic devices and components and the manufacturing approach thereof of primary raw material with the high molecular polymer conducing composite material, especially a kind of high voltage withstanding small size high molecular PTC thermistor and method for making of high thunderbolt grade.
Background technology
The develop rapidly of information science technology makes with the large scale integrated circuit to be that the various communication equipments of core have obtained development widely, with respect to the independent entry device and equipment, has volume little, and cost is low, and is low in energy consumption, and the speed of service is fast, the reliability advantages of higher.But because its operating voltage is low; Dielectric strength is poor, a little less than the bearing capacity, under the situation that the interference of power network overvoltage or thunder and lightning occurs; Tend to make that communication equipment inefficacy even operation element are breakdown; Bring bigger damage to electronics, particularly in those various application relevant, need more powerful ESD and lightning strike protection with FPDPs such as man-machine interface and USB, HDMI, Ethernet and connector ports.Along with the continuous enhancing of electronic functionalities, its inner density of components constantly rises, and requires the device of identical operating current, voltage, anti-stream grade can further reduce size simultaneously; Similarly require to be also embodied in the protection to power line.Market is hoped equally and can be born identical or higher impulse current with the components and parts of reduced size.And the development that is directed against the circuit protecting element of miniaturization can be satisfied the trend that requires in overcurrent-overvoltage integrated protection element market.
Overcurrent protection is very important a kind of overflow protecting element in the present circuit protection with positive temperature coefficient thermistor (PTC).The positive temperature thermistor device of miniaturization goes in the sensitiveness high density integrated circuit plate of Security Unit and electronic equipment of various communication lines.When the part communication line is subjected to that thunder and lightning disturbs or contacts with power line; When perhaps various connector ports suffered short-circuit current, the resistance of PTC can increase sharply, and made circuit present high resistant (disconnection) state; The loop current amplitude reduces, and has protected indoor communications equipment.After overvoltage, overcurrent were eliminated, it is normal, reusable that thermistor PTC recovers automatically.So, for the electronic configurations circuit protecting element PTC of communication equipment and the constantly various microminiaturizations of development for the interference overvoltage that prevents communication line and electronic equipment, the reduction equipment failure rate is very important.
Summary of the invention:
The objective of the invention is to: the high voltage withstanding small size high molecular PTC thermistor that a kind of high thunderbolt grade is provided.
A purpose more of the present invention is: the preparation method that the high voltage withstanding small size high molecular PTC thermistor of said high thunderbolt grade is provided.
The object of the invention realizes through following technical proposals: a kind of high voltage withstanding small size high molecular PTC thermistor of high thunderbolt grade; By high molecular PTC core and the tinsel that is covered on these core two surfaces; Be welded on the pair of electrodes of tinsel outer surface and the insulating barrier formation that the outside coats, the high molecular PTC core comprises high molecular polymer, carbon black and processing aid, and wherein: the proof voltage grade is not less than A.C.600Vrms; The thunderbolt grade is crest voltage 4-6KV; Impulse current 100-150A, waveform are 10/700 μ s, and described high molecular PTC core each component is by weight percentage:
High molecular polymer 25%-60%
Carbon black 20%-45%
Heat filling 25%-50%
Surplus is a processing aid, wherein,
Described high molecular polymer is the blend of one or more polymer in polyethylene, polypropylene, the Kynoar;
Described carbon black is one or more the mixture in conductive carbon black, reinforcement carbon black, the colour black;
Described heat filling is one or more the mixture in magnesium hydroxide, aluminium hydroxide, boron nitride, the carborundum.
On the such scheme basis, described proof voltage grade A.C.600Vrm～A.C.800Vrms.
A kind of method for making of high voltage withstanding small size high molecular PTC thermistor of high thunderbolt grade is provided, in regular turn by following step preparation:
The first step down mixing becomes polymer composite with core component high molecular polymer, carbon black, heat filling and processing aid at 100～200 ℃;
In second step, with the method for mold pressing well-mixed polymer composite material is pressed into the sheet material of desired thickness and shape, and pastes tinsel two of sheet materials while hot;
In the 3rd step, compound good sheet material is crosslinked with gamma-rays or electron irradiation, crosslinked number of times 1-4 time, irradiation dose 4-30Mrad; The 4th step cut into small pieces with the sheet material of cross-linking radiation, extraction electrode in the welding, and the coated insulation layer makes macromolecular PTC thermistor in the outside.
The thickness of high molecular PTC core is between 1.0～2.5mm, and the area of each core small pieces is 5～70mm
2
Superiority of the present invention is: said macromolecular PTC thermistor size can tolerate high voltage, thunderbolt grade far above domestic existing like product much smaller than the size of domestic commercial like product.
Embodiment
A kind of high voltage withstanding small size high molecular PTC thermistor of high thunderbolt grade; By high molecular PTC core and the tinsel that is covered on these core two surfaces, be welded on the pair of electrodes of tinsel outer surface and the insulating barrier formation that the outside coats, the high molecular PTC core comprises high molecular polymer, carbon black and processing aid; Wherein, The proof voltage grade is not less than A.C.600Vrms, and the thunderbolt grade is crest voltage 4-6KV, impulse current 100-150A; Waveform is 10/700 μ s, and described high molecular PTC core each component is by weight percentage:
High molecular polymer 25%-60%
Carbon black 20%-45%
Heat filling 25%-50%
Surplus is a processing aid, wherein,
Described high molecular polymer is the blend of one or more polymer in polyethylene, polypropylene, the Kynoar;
Described carbon black is one or more the mixture in conductive carbon black, reinforcement carbon black, the colour black;
Described heat filling is one or more the mixture in magnesium hydroxide, aluminium hydroxide, boron nitride, the carborundum.
Below be the constituent and the manufacturing process of a preferred embodiment of the high voltage withstanding small size PPTC macromolecular thermosensitive resistor device of high thunderbolt grade of the present invention:
Annotate: high density polyethylene (HDPE) is a Singapore Philps Petroleum Company 5502
The reinforcement carbon black is the N660 of Cabot Co.,Ltd
Conductive carbon black is the VXC72 of Cabot Co.,Ltd
Boron nitride is the ultra prestige nanosecond science and technology CW-BN-001 of Co., Ltd in Shanghai
Each component in the table 1 by weight weighing, is mixed cooling back granulation in comminutor in banbury under 180 ℃ of temperature.Get above-mentioned pellet 85g, it is clipped between two tinsels, and put into the mould of definite shape, under 180 ℃ of temperature, the pressure of 6MPa is pressed into area 200cm2 in addition,
The sheet material of thickness 2.0mm.Resulting sheet is crosslinked with gamma-ray irradiation, and irradiation dose is 16M.Sheet material behind the irradiation is cut to the small pieces of 7.8mm * 7.8mm size on sheet-punching machine; Tinned wird extraction electrode at its both sides weld diameter φ 0.6mm; Coat one deck epoxy resins insulation at last outside and seal material, can make required macromolecular PTC thermistor.High molecular PTC product to making carries out performance test, and chooses existing commercially available domestic similar high molecular PTC product and compare test as reference example.Testing standard is with reference to YD/T 741-2002 and ITU-T K.21 (2008), and test result is following:
The high voltage withstanding small size high molecular PTC thermistor of the height thunderbolt grade that the present invention obtains; Through in material, forming conductive and heat-conductive dual network structure; Its thunderbolt grade compares with present domestic commercial like product and is significantly improved, and effectively solved the difficult problem that the high molecular PTC product can't satisfy high thunderbolt class requirement.Component size is reduced to about 1/3 of domestic like product at present, and its voltage withstand class is further improved simultaneously.
Claims (4)
1. the high voltage withstanding small size high molecular PTC thermistor of a high thunderbolt grade; By high molecular PTC core and the tinsel that is covered on these core two surfaces; Be welded on the pair of electrodes of tinsel outer surface and the insulating barrier formation that the outside coats, the high molecular PTC core comprises high molecular polymer, carbon black and processing aid, it is characterized in that: the proof voltage grade is not less than A.C.600Vrms; The thunderbolt grade is crest voltage 4-6KV; Impulse current 100-150A, waveform are 10/700 μ s, and described high molecular PTC core each component is by weight percentage:
High molecular polymer 25%-60%
Carbon black 20%-45%
Heat filling 25%-50%
Surplus is a processing aid, wherein,
Described high molecular polymer is the blend of one or more polymer in polyethylene, polypropylene, the Kynoar;
Described carbon black is one or more the mixture in conductive carbon black, reinforcement carbon black, the colour black;
Described heat filling is one or more the mixture in magnesium hydroxide, aluminium hydroxide, boron nitride, the carborundum.
2. the high voltage withstanding small size high molecular PTC thermistor of high thunderbolt grade according to claim 1 is characterized in that described proof voltage grade A.C.600Vrm～A.C.800Vrms.
3. the method for making of the high voltage withstanding small size high molecular PTC thermistor of high thunderbolt grade according to claim 1 and 2 is characterized in that in regular turn by following step preparation
The first step down mixing becomes polymer composite with core component high molecular polymer, carbon black, heat filling and processing aid at 100～200 ℃;
In second step, with the method for mold pressing well-mixed polymer composite material is pressed into the sheet material of desired thickness and shape, and pastes tinsel two of sheet materials while hot;
In the 3rd step, compound good sheet material is crosslinked with gamma-rays or electron irradiation, crosslinked number of times 1-4 time, irradiation dose 4-30Mrad; The 4th step cut into small pieces with the sheet material of cross-linking radiation, extraction electrode in the welding, and the coated insulation layer makes macromolecular PTC thermistor in the outside.
4. according to claim 1 or claim 7, the thickness that it is characterized in that the PTC core is between 1.0～2.5mm, and the area of each core small pieces is 5～70mm
2
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104583142A CN102623116A (en) | 2011-12-31 | 2011-12-31 | High-voltage-resistant subsize polymer PTC thermistor with high lightning level and preparation method thereof |
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| CN2011104583142A CN102623116A (en) | 2011-12-31 | 2011-12-31 | High-voltage-resistant subsize polymer PTC thermistor with high lightning level and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531316A (en) * | 2013-10-23 | 2014-01-22 | 上海长园维安电子线路保护有限公司 | Polymer PTC element with excellent weather resistance and its manufacturing method |
| CN103772782A (en) * | 2013-12-03 | 2014-05-07 | 上海神沃电子有限公司 | Self-limited flexible PTC (positive temperature coefficient) exothermic material and PTC core material prepared from same and preparation method of PTC core material |
| CN104530694A (en) * | 2014-12-26 | 2015-04-22 | 广州市聚赛龙工程塑料有限公司 | Regenerated PA6 (polyamide 6)-base flame-retardant electric-insulating heat-conducting composite material, and preparation method and application thereof |
-
2011
- 2011-12-31 CN CN2011104583142A patent/CN102623116A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531316A (en) * | 2013-10-23 | 2014-01-22 | 上海长园维安电子线路保护有限公司 | Polymer PTC element with excellent weather resistance and its manufacturing method |
| CN103772782A (en) * | 2013-12-03 | 2014-05-07 | 上海神沃电子有限公司 | Self-limited flexible PTC (positive temperature coefficient) exothermic material and PTC core material prepared from same and preparation method of PTC core material |
| CN104530694A (en) * | 2014-12-26 | 2015-04-22 | 广州市聚赛龙工程塑料有限公司 | Regenerated PA6 (polyamide 6)-base flame-retardant electric-insulating heat-conducting composite material, and preparation method and application thereof |
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Application publication date: 20120801 |