CN109448943A - A kind of high molecular PTC over-current protecting element - Google Patents
A kind of high molecular PTC over-current protecting element Download PDFInfo
- Publication number
- CN109448943A CN109448943A CN201811574534.XA CN201811574534A CN109448943A CN 109448943 A CN109448943 A CN 109448943A CN 201811574534 A CN201811574534 A CN 201811574534A CN 109448943 A CN109448943 A CN 109448943A
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- Prior art keywords
- conductive
- high molecular
- current protecting
- composite material
- electrode
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/034—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/021—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient formed as one or more layers or coatings
Abstract
The invention discloses a kind of using conducting high polymers object composite material as the sticked with high polymer PTC on surface over-current protecting element with excellent environment stability of main material.The invention has the characteristics that: 1. component side bread are wrapped with encapsulated layer, are environmentally isolated with element high molecular material base, to improve the environmental reliability of product；2. the conductive hole of electrical connection function is located at elements on either side, it ensure that element has with good welding performance 3. and do not change existing product structure and production technology, technology realizability is strong.
Description
Technical field
The present invention relates to circuit protection component technical fields, and in particular to a kind of conducting high polymers object composite material
It is a kind of side encapsulating, the sticked with high polymer PTC on surface with excellent environment stability for the electronic component of main material
(positive temperature coefficient) over-current protecting element.
Background technique
The conducting polymer of the conductive filler composition of polymer and dispersion in the polymer and thus electric conductive polymer
The over-current protecting element with positive temperature coefficient (PTC) feature prepared can be used for circuit over-current protection.In general, high score
Sub- PTC over-current protecting element has low-resistance value in room temperature, and has when temperature rises on a critical-temperature or circuit
When measuring electric current generation, resistance value can jump at once thousands of times or more, inhibit overcurrent to pass through whereby, have reached protection circuit
Purpose.When temperature is dropped to there is no when the situation of overcurrent in room temperature or circuit, high molecular PTC over-current protecting element can
Low resistive state is returned back to, thus circuit normal operation again.Such reusable advantage, makes high molecular PTC over current protection
Protection element is widely used in electronic circuit.
In existing disclosed technology, the material side of surface attaching type element is exposed in air, causes element in sky
It is placed in gas or after a period of use, just will appear resistance value rising, seriously affect its service performance.
The present invention is intended to provide a kind of PTC over-current protecting element that can effectively solve the above problems, i.e., in over current protection
Protection element side increases encapsulated layer, to improve the environmental reliability of over-current protecting element.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of macromolecule that can effectively increase Product environment reliability
PTC overflow protecting element, after avoiding it from using in air or place a period of time, resistance value, which is substantially increased, influences its service performance
The shortcomings that.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of high molecular PTC over-current protecting element includes:
1) at least one composite material sheet with resistance positive temperature coefficient effect, comprising:
(a) with the conducing composite material base of resistance positive temperature coefficient effect, by least one polymer and at least one
The volume resistivity that kind is scattered in the polymer is less than 1m Ω .m, and the conductive filler that partial size is 0.1 μm~50 μm forms, and
With opposite first, second surface；
(b) the first conductive electrode, positioned at the first surface of conducing composite material base；
(c) the second conductive electrode, positioned at the second surface of conducing composite material base；
2) one of conductive electrode electrical connection in the first conductive hole, with each composite material sheet, and it is corresponding
Another conductive electrode is not electrically connected；
The conductive electrode being electrically connected with the first conductive hole in second conductive hole, with each composite material sheet is not
Electrical connection is electrically connected with the conductive electrode not being electrically connected in each composite material sheet with the first conductive hole；
3) the first termination electrode connects the first conductive hole, makes as pad on the outermost two sides of entire element
With making element be electrically connected after being soldered in circuit with one pole of external circuit；
Second termination electrode is similarly positioned on the outermost two sides of entire element with the first termination electrode, and electric with first end
Extremely electrical partition, and the second conductive hole is connected, it is used as pad, makes element and external circuit another extremely electric after being soldered in circuit
Gas phase connects；
4) insulating layer is covered between the first conductive electrode and the second conductive electrode on adjacent composites sheet material, with
And between the outermost conductive electrode of element and termination electrode, and it is used for electrical isolation；
5) side coat is located at four sides of element, conducing composite material base is isolated with external environment.
The conducing composite material base, volume resistivity is less than 0.01 Ω .m.
The polymer accounts for the volume fraction of the conducing composite material base between 20%~75%, selected from poly-
Ethylene, haloflex, oxidic polyethylene, polyvinyl chloride, hycar, acrylonitrile-butadiene-styrene (ABS)
Copolymer, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate (PBT), gathers polystyrene
Phenylate, polyphenylene sulfide, polyformaldehyde, phenolic resin, polytetrafluoroethylene (PTFE), tetrafluoraoethylene-hexafluoropropylene copolymer, poly- trifluoro-ethylene,
Polyvinyl fluoride, polypropylene, Kynoar, epoxy resin, ethylene-vinyl acetate copolymer, gathers maleic anhydride grafted polyethylene
The mixture of one or more of methyl methacrylate, ethylene-acrylic acid copolymer.
The conductive filler is selected from one or more of metal powder, conductivity ceramics powder or hydrocarbon black powder
Mixture.
The metal powder is selected from: one or more of copper, nickel, tungsten, tin, silver, gold, carbon black or its alloy
Mixture.
The conductivity ceramics powder is selected from: metal nitride, metal carbides, metal boride, metal silicide it
One or more of mixture.
The conductive hole is located at elements on either side, is formed by techniques such as laser drill or machine drillings, and hole surface adheres to
Conductive metal layer is constituted, and the shape of the conductive hole is any regular or irregular shape.
The conductive metal layer is used by chemical deposition, spraying, sputtering, plating or these types of process combining
It is formed.
The conductive metal layer, be by one of zinc, copper, nickel, cobalt, iron, tungsten, tin, lead, silver, gold, platinum or its alloy or
Two or more mixtures.
The side coat is epoxy resin, polyester resin, polyamide, silicon rubber, polyurethane, UV resin
Or the mixture of one or more of inorganic glue.
By polymer composite base and closely it is covered on first conductive electrode on above-mentioned high molecular material base two sides
Composite sheet is formed with the second conductive electrode, shifting etching technique by inner figure to composite sheet makes the conduction of composite sheet
Etching electrode goes out insulation tank, then two insulating layers is stacked in two surface of composite sheet for completing etching, and be covered each by metal
Foil carries out high-temperature laminating, later that the substrate after pressing is tin plating by subsequent outer layer metal foil, etching outer graphics, printing
Solder mask, solidification solder mask, drilling, heavy copper, copper-plating technique and etc. and encapsulating process, obtain with excellent environment stabilization
The polymer PTC overflow protection element of property.
Preparation method of the invention can be described as follows: by conductive polymer composite base component high molecular polymerization
Object, conductive filler mix in high-speed mixer, are then kneaded mixture at a temperature of 100~200 DEG C, then with molding or
It is 100~5000cm that area, which is made, in the method for extrusion2, the composite material base of 0.1~3.0mm of thickness；The method of reusable heat pressure exists
Metal foil is compound on hot press the one the second two surfaces of above-mentioned material base, composite sheet is made, then again will
This composite sheet gamma-rays (Co60) or electron beam irradiation crosslinking, dosage be 5~100Mrad.Printed wiring board technique is used again
Surface labeling type polymer PTC over-current protecting element is made.In assist side industrial manufacturing process, using side coating processes
Increase encapsulated layer in over-current protecting element lamination side, element high molecular material base is isolated with air environment, to mention
The high environmental reliability energy of product.
Structure feature of the invention are as follows: 1. protection element lamination sides have encapsulated layer, make element high molecular material base
It is isolated with air environment, so that element be made to have higher environmental reliability；2. the conductive hole of electrical connection function is located at member
Part two sides have fully ensured that element has good welding operability, and element are made to have good environmental performance；3. hair
Bright normally to produce single layer PTC chip product, the double-deck PTC chip and multilayer PTC chip product, all products all have double welding
Face；The characteristics of double welding surface elements are as follows: because front and back sides can not be distinguished in processing, use process, there is processing, detection and installation
Convenient advantage can save production and installation cost.
Detailed description of the invention
Fig. 1: entirety three-dimensional view of the present invention.
Fig. 2: 1 single sheet cutting plane view of the embodiment of the present invention.
Fig. 3: 1 double layer sheet cutting plane view of the embodiment of the present invention.
Fig. 4: 1 single sheet structure elucidation figure of the embodiment of the present invention.
Fig. 5: the embodiment of the present invention 1 and the relational graph that in comparative example hot and humid environment, resistance changes with standing time.
Numbering in the drawing explanation
1: the first termination electrode
2: the second termination electrodes
3: insulating layer
4 first conductive electrodes
5: conductive polymer composites base
6 second conductive electrodes
7: the first conductive holes
8: the second conductive holes
9: member outboard encapsulated layer
10: element-external is used for the insulation tank of electrical isolation the first termination electrode and the second termination electrode
Specific embodiment
Embodiment 1
High density polyethylene (HDPE), metal carbides are mixed into 12min in super mixer by a certain percentage.It then will mixing
Object component is kneaded uniformly in mixer at a temperature of 180 DEG C, through cooling, is placed it in pressing mold after crushing, pressure 8Mpa, temperature
Area 200cm is pressed under the conditions of 180 DEG C of degree2, thick 0.3mm polymer composite base 5.By the copper foil warp after roughing in surface
After smooth, the two-sided to get to macromolecule of polymer composite base is hot-pressed under the conditions of pressure 8Mpa, 180 DEG C of temperature
PTC composite sheet, in vacuum drying oven 60 DEG C heat treatment 8 hours after, with gamma-rays (Co60) irradiation, dosage 16Mrad.Later
The first conductive electrode 4 and the second conductive electrode 6 is set to etch insulation tank respectively by pattern transfer etching technique composite sheet,
Then an insulating layer 3 is superimposed between the first conductive electrode and a metal foil, while another insulating layer 3 is superimposed on second and is led
Between electrode 6 and another metal foil, high-temperature laminating is then carried out, the tin plating, outer graphics by termination electrode of the substrate after pressing
Etching, printing solder mask and etc., form the first termination electrode 1 and the second termination electrode 2.Then by subsequent drilling, heavy copper,
Copper facing forms two conductive holes, respectively the first conductive hole 7 and the second conductive hole 8.Side coating processes are used later, make member
Four side wraps of part, one special material encapsulated layer 9, to prepare the tool macromolecule high there are two welding surface, environmental reliability
PTC over-current protecting element.(referring to Fig. 1,2)
The present invention can also be in parallel by two or more layers composite sheet, is realized using same conduction mode, is reduced with reaching
The purpose of product internal resistance.A special material encapsulated layer is equally wrapped up in side, to prepare tool, there are two welding surface, environment are reliable
The high high molecular PTC over-current protecting element of property.(being two layers of composite sheet with reference to Fig. 3)
Prepared over-current protecting element is after long-range circumstances placement, relative to the comparison of no side encapsulating, environment
Stability significantly improves (referring to Fig. 5).
Technology contents and technical characterstic of the invention have revealed that as above, however those skilled in the art are still potentially based on this hair
Bright teaching and announcement and make various replacements and modification without departing substantially from spirit of that invention.Therefore, protection scope of the present invention should not
It is limited to disclosed in embodiment, and should includes various without departing substantially from replacement and modification of the invention, and the claim by more than is contained
Lid.
Claims (10)
1. a kind of high molecular PTC over-current protecting element, includes:
1) at least one composite material sheet with resistance positive temperature coefficient effect, comprising:
(a) with the conducing composite material base of resistance positive temperature coefficient effect, by least one polymer and at least one point
It dissipates the volume resistivity in the polymer and is less than 1m Ω .m, the conductive filler that partial size is 0.1 μm~50 μm forms, and has
Opposite first, second surface；
(b) the first conductive electrode, positioned at the first surface of conducing composite material base；
(c) the second conductive electrode, positioned at the second surface of conducing composite material base；
2) one of conductive electrode electrical connection in the first conductive hole, with each composite material sheet, and it is corresponding another
A conductive electrode is not electrically connected；
It is not electrical with the conductive electrode of the first conductive hole electrical connection in second conductive hole, with each composite material sheet
Connection is electrically connected with the conductive electrode not being electrically connected in each composite material sheet with the first conductive hole；
3) the first termination electrode connects the first conductive hole, uses as pad on the outermost two sides of entire element, welds
Element is set to be electrically connected after being connected in circuit with one pole of external circuit；
Second termination electrode is similarly positioned on the outermost two sides of entire element with the first termination electrode, and electric with the first termination electrode
Gas barrier, and the second conductive hole is connected, it is used as pad, element and another extremely electrical phase of external circuit is made after being soldered in circuit
Even；
4) insulating layer is covered between the first conductive electrode and the second conductive electrode on adjacent composites sheet material, Yi Jiyuan
Between the outermost conductive electrode of part and termination electrode, and it is used for electrical isolation；
5) side coat is located at four sides of element, conducing composite material base is isolated with external environment.
2. high molecular PTC over-current protecting element according to claim 1, which is characterized in that the conductive composite wood
Expect base, volume resistivity is less than 0.01 Ω .m.
3. high molecular PTC over-current protecting element according to claim 1, which is characterized in that the polymer accounts for institute
The volume fraction of conducing composite material base is stated between 20%~75%, selected from polyethylene, haloflex, the poly- second of oxidation
Alkene, polyvinyl chloride, hycar, acrylonitrile-butadiene-styrene copolymer, polystyrene, polycarbonate,
Polyamide, polyethylene terephthalate, polybutylene terephthalate (PBT), polyphenylene oxide, polyphenylene sulfide, polyformaldehyde, phenolic aldehyde
Resin, polytetrafluoroethylene (PTFE), tetrafluoraoethylene-hexafluoropropylene copolymer, poly- trifluoro-ethylene, polyvinyl fluoride, maleic anhydride are grafted poly- second
Alkene, polypropylene, Kynoar, epoxy resin, ethylene-vinyl acetate copolymer, polymethyl methacrylate, ethylene-propylene
The mixture of one or more of acid copolymer.
4. high molecular PTC over-current protecting element according to claim 1, which is characterized in that the conductive filler choosing
From the mixture of one or more of metal powder, conductivity ceramics powder or hydrocarbon black powder.
5. high molecular PTC over-current protecting element according to claim 4, which is characterized in that the metal powder choosing
From: the mixture of one or more of copper, nickel, tungsten, tin, silver, gold, carbon black or its alloy.
6. high molecular PTC over-current protecting element according to claim 4, which is characterized in that the conductivity ceramics powder
End is selected from: metal nitride, metal carbides, metal boride, metal silicide one or more of mixing
Object.
7. high molecular PTC over-current protecting element according to claim 1, which is characterized in that the conductive hole is located at
Elements on either side, it is formed by laser drill or machine drilling, and hole surface attachment conductive metal layer is constituted, the shape of the conductive hole
Shape is any regular or irregular shape.
8. high molecular PTC over-current protecting element according to claim 7, which is characterized in that the conductive metal layer,
It is to use and formed by chemical deposition, spraying, sputtering, plating or these types of process combining.
9. high molecular PTC over-current protecting element according to claim 7, which is characterized in that the conductive metal layer is
By the mixture of one or more of zinc, copper, nickel, cobalt, iron, tungsten, tin, lead, silver, gold, platinum or its alloy.
10. according to high molecular PTC overcurrent stream protection element described in claim 1, which is characterized in that the side coating
Layer is one or both of epoxy resin, polyester resin, polyamide, silicon rubber, polyurethane, UV resin or inorganic glue
Above mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574534.XA CN109448943A (en) | 2018-12-22 | 2018-12-22 | A kind of high molecular PTC over-current protecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574534.XA CN109448943A (en) | 2018-12-22 | 2018-12-22 | A kind of high molecular PTC over-current protecting element |
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| Publication Number | Publication Date |
|---|---|
| CN109448943A true CN109448943A (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811574534.XA Pending CN109448943A (en) | 2018-12-22 | 2018-12-22 | A kind of high molecular PTC over-current protecting element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113674937A (en) * | 2021-08-20 | 2021-11-19 | 上海维安电子有限公司 | Low-resistance high-reproducibility PTC (Positive temperature coefficient) overcurrent protection element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427974A (en) * | 2015-12-24 | 2016-03-23 | 上海长园维安电子线路保护有限公司 | High-polymer PTC over-current protection element |
| CN205911099U (en) * | 2015-12-24 | 2017-01-25 | 上海长园维安电子线路保护有限公司 | Polymer PTC over -current protection component |
| CN106679844A (en) * | 2017-01-19 | 2017-05-17 | 上海长园维安电子线路保护有限公司 | Polymer PTC temperature sensor |
-
2018
- 2018-12-22 CN CN201811574534.XA patent/CN109448943A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105427974A (en) * | 2015-12-24 | 2016-03-23 | 上海长园维安电子线路保护有限公司 | High-polymer PTC over-current protection element |
| CN205911099U (en) * | 2015-12-24 | 2017-01-25 | 上海长园维安电子线路保护有限公司 | Polymer PTC over -current protection component |
| CN106679844A (en) * | 2017-01-19 | 2017-05-17 | 上海长园维安电子线路保护有限公司 | Polymer PTC temperature sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113674937A (en) * | 2021-08-20 | 2021-11-19 | 上海维安电子有限公司 | Low-resistance high-reproducibility PTC (Positive temperature coefficient) overcurrent protection element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 200083 806, floor 8, No. 125, Liuying Road, Hongkou District, Shanghai Applicant after: Shanghai Wei'an Electronic Co.,Ltd. Address before: 201202 Shanghai city Pudong New Area Town Road No. 1001 to seven Shiwan Applicant before: Shanghai Changyuan Wayon Circuit Protection Co.,Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant after: Shanghai Weian Electronics Co.,Ltd. Address before: 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant before: Shanghai Wei'an Electronic Co.,Ltd. |