CN102821495A - Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof - Google Patents
Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof Download PDFInfo
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- CN102821495A CN102821495A CN2012102950832A CN201210295083A CN102821495A CN 102821495 A CN102821495 A CN 102821495A CN 2012102950832 A CN2012102950832 A CN 2012102950832A CN 201210295083 A CN201210295083 A CN 201210295083A CN 102821495 A CN102821495 A CN 102821495A
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Abstract
The invention discloses a polytetrafluoroethylene (PTFE) base electrothermal thick film, comprising the following materials according to percentage by weight: 20-30% of flake graphite, 8-15% of acetylene black, 5-8% of carbon fiber powder, 4-6% of short carbon fiber, 5-8% of nickel powder, 5-8% of silver powder, 1-3% of manganese dioxide, 1-3% of iron sesquioxide, 1-3% of carbon black dispersant, 20-25% of PTFE dispersion liquid and 10-25% of PTFE diluent. The invention also discloses a manufacturing method of the PTFE base thick film, comprising the steps of grinding and uniformly mixing the flake graphite, the acetylene black, the carbon fiber powder, the short carbon fiber, the nickel powder, the silver powder, the manganese dioxide and the iron sesquioxide according to the proportion, mixing and ultrasonically dispersing the mixture, the carbon black dispersant, the PTFE dispersion liquid and the PTFE diluent according to the proportion to prepare a electrothermal thick film paste, and drying and sintering the electrothermal thick film paste, after a through printing process so as to manufacture the PTFE base electrothermal thick film. The manufacturing method provided by the invention is applicable to high-voltage electrothermal equipment, good in stability and using effect, and is not demoulded.
Description
Technical field
The present invention relates to a kind of PTFE base electric heating thick film and manufacturing approach thereof, belong to the manufacturing approach of electric heating device.Be particularly related to a kind of PTFE base electric heating thick film that adopts the stainless steel wire web plate to bite and deposit.
Background technology
At present, be applied in the numerous areas such as household electrical appliance and industrial electrical equipment, electric heating products is used more and more widely.Wherein to be used for heating service more and more general for the film type carbon Electric radiant Heating Film; But film type carbon Electric radiant Heating Film product has many restrictions on using; Only be applicable to low pressure and ultralow pressure electric current or be applied to battery or be applied to and on film type carbon Electric radiant Heating Film product, use, can not adapt to and be used in high pressure or line voltage electric current through adapter after the transformation; The wiring that present in addition film type carbon Electric radiant Heating Film is imprinted on the carrier is slim Electric radiant Heating Film, and its thickest degree is about 0.1mm, can not make thick type Electric radiant Heating Film; Slim film type carbon Electric radiant Heating Film is not high pressure resistant, after the high crimping surge of slim film type carbon Electric radiant Heating Film easily on fire with burn, it is too big that energising produces amount of leakage current; Phenomenon generations such as rubescent and scorching hot are arranged, and mechanical strength is low, not vibration resistance; A little less than the thermal shock resistance; Cause that slim film type carbon Electric radiant Heating Film comes off, short circuit and spark phenomenon take place, circuit electrical conduction current performance reduces, and is prone to ablate.The stability of its product, reliability can't guarantee, causes slim film type carbon Electric radiant Heating Film exothermic material in high pressure or the serious decay of line voltage energising back power and shortcoming such as aging rapidly.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of PTFE base electric heating thick film is provided, be applicable in the electric heating appliance of high pressure or line voltage, mechanical strength is high; Anti-vibration, thermal shock resistance is strong, good stability; Demoulding is not applied widely, and result of use is good.
The technical solution adopted for the present invention to solve the technical problems is:
Technical scheme of the present invention provides a kind of PTFE base electric heating thick film and manufacturing approach thereof, and it relates to the improvement on the film type carbon Electric radiant Heating Film Recipe in the existing manufacturing approach, particularly in the improvement of civil power or high-tension electricity film type carbon Electric radiant Heating Film whole structure.
A kind of PTFE base electric heating thick film is characterized in that: comprise the material that contains following weight percentage,
The material of above-mentioned preferable percentage by weight,
Described short silk carbon fiber adopts PAN base chopped carbon fiber, and length is 1-2mm.Polytetrafluoroethylene content in the described polytetrafluoroethyldispersion dispersion is 50-60% (wt).Described polytetrafluoroethylene diluent is that raw material is made into by distilled water and nonionic surface active agent.
A kind of manufacturing approach of PTFE base electric heating thick film; Get the raw materials ready according to percentage by weight by above-mentioned scale graphite, acetylene black, carbon fiber powder, short silk carbon fiber, nickel powder, silver powder, manganese dioxide, di-iron trioxide; Be placed on grinder and ground 1 hour, process homogeneous mixture.
Mix by weight percentage with above-mentioned carbon black dispersant, polytetrafluoroethyldispersion dispersion, polytetrafluoroethylene diluent grinding the back homogeneous mixture, adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film.
According to required electric thermal power demand; Press the specifications design resistive layer track pattern of calandria; Through CAD plate-making; On corrosion resistant plate, carve out the resistive layer track pattern, adopt leakage printing process, on corrosion resistant plate (thickness of resistive layer, width and length determine according to the watt level of required electric heating appliance), carry out the heating position shape and structure and confirm.The slurry of printing PTFE base electric heating thick film on the insulating substrate of cleaning surfaces drying, levelling in air makes PTFE base electric heating thick film through technologies such as oven dry and sintering.
The anti-oxidant heatproof insulating coating of printing on PTFE base electric heating thick film behind oven dry and the sintering, promptly gets PTFE base electric heating thick film finished product at last.
PTFE base electric heating thick film is carried out surface resistivity evenly detect, measure its power behind the conductor leading, carry out the power adjustment, it is reached in the predefined parameter scope.Surface heat watt level and technical parameter variation can design different PTFE base electric heating thick films, and resistive layer geometry range of variation is wide.Therefore in actual application, can adopt standard or off-gauge unit mode make the exothermic material layer and use.
This prescription is in the mode of production of having studied existing film type carbon Electric radiant Heating Film; And draw to design on the advantage basis wherein and accomplish; Scale graphite, acetylene black and carbon fiber powder mix the conductivity that can obviously improve PTFE base electric heating thick film, can produce the electricity heating phenomenon of enough satisfaction; Short silk carbon fiber improves the entity and the fabrication strength of PTFE base electric heating thick film, prevents the segregation and the cracking of PTFE base electric heating thick film; Nickel powder and silver powder are the equal powder of PTFE base electric heating thick film, make all even reduction resistivity of distribution of resistance; Polytetrafluoroethyldispersion dispersion is an adhesion of strengthening PTFE base electric heating thick film and insulating substrate; Further improve PTFE base electric heating thick film and insulating substrate combination degree between the two; Make PTFE base electric heating thick film layers difficult drop-off or breakage; And improve PTFE base electric heating thick film durability, increase conductive stability; Anti-oxidant heatproof insulating coating is to improve PTFE base electric heating insulating thick film degree and isolated with outer oxygen, is short-circuited under wet environment to prevent the film oxidation and to prevent, reduces PTFE base electric heating thick film failure phenomenon, improves security performance.Through above-mentioned analysis, the proportioning of each composition of PTFE base electric heating thick film is to confirm through lot of experiment results.
Description of drawings
Fig. 1 is the process chart of a kind of PTFE base electric heating of the present invention thick film.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment to this bright further specifying.
Embodiment 1
Get scale graphite 24 gram, acetylene black 8 grams, carbon fiber powder 6 grams, short silk carbon fiber 5 grams, nickel powder 6 grams, silver powder 6 grams, manganese dioxide 2 grams, di-iron trioxide 2 grams and get the raw materials ready, be placed on grinder and ground 1 hour, process homogeneous mixture.
To grind the back homogeneous mixture and mix by weight percentage, and adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film with described carbon black dispersant 2 grams, polytetrafluoroethyldispersion dispersion 22 grams, polytetrafluoroethylene diluent 15 grams.
Each composition of PTFE base electric heating thick film of present embodiment 1 is that the benchmark measuring and calculating gets according to the optimum weight ratio of its internal structure.
Embodiment 2
Get scale graphite 26 gram, acetylene black 10 grams, carbon fiber powder 6 grams, short silk carbon fiber 6 grams, nickel powder 7 grams, silver powder 7 grams, manganese dioxide 3 grams, di-iron trioxide 3 grams and get the raw materials ready, be placed on grinder and ground 1 hour, process homogeneous mixture.
To grind the back homogeneous mixture and mix by weight percentage, and adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film with described carbon black dispersant 3 grams, polytetrafluoroethyldispersion dispersion 24 grams, polytetrafluoroethylene diluent 18 grams.
Each composition of PTFE base electric heating thick film of present embodiment 2 is that the benchmark measuring and calculating gets according to the optimum weight ratio of its internal structure.
Embodiment 3
Get scale graphite 28 gram, acetylene black 12 grams, carbon fiber powder 7 grams, short silk carbon fiber 6 grams, nickel powder 7 grams, silver powder 7 grams, manganese dioxide 3 grams, di-iron trioxide 3 grams and get the raw materials ready, be placed on grinder and ground 1 hour, process homogeneous mixture.
To grind the back homogeneous mixture and mix by weight percentage, and adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film with described carbon black dispersant 3 grams, polytetrafluoroethyldispersion dispersion 24 grams, polytetrafluoroethylene diluent 20 grams.
Each composition of PTFE base electric heating thick film of present embodiment 3 is that the benchmark measuring and calculating gets according to the optimum weight ratio of its internal structure.
The processing step of making above-mentioned PTFE base electric heating thick film is following:
1. get the raw materials ready according to percentage by weight according to above-mentioned scale graphite, acetylene black, carbon fiber powder, short silk carbon fiber, nickel powder, silver powder, manganese dioxide, di-iron trioxide, be placed on grinder and ground 1 hour, process homogeneous mixture.
2. will grind the back homogeneous mixture and mix by weight percentage, and adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film with described carbon black dispersant, polytetrafluoroethyldispersion dispersion, polytetrafluoroethylene diluent.
3. the resistive layer track pattern of design calandria through CAD plate-making, is carved out the resistive layer track pattern on corrosion resistant plate, adopts leakage printing process, on corrosion resistant plate, carries out the heating position shape and structure and confirms.The slurry of printing PTFE base electric heating thick film on the insulating substrate of cleaning surfaces drying, levelling in air makes PTFE base electric heating thick film through technologies such as oven dry and sintering.
The anti-oxidant heatproof insulating coating of printing on PTFE base electric heating thick film behind oven dry and the sintering, promptly gets PTFE base electric heating thick film finished product at last.
The technological process of manufacturing approach sees also accompanying drawing 1.
At embodiment 1, the PTFE base electric heating thick film of preparation has feature among embodiment 2 and the embodiment 3:
PTFE base electric heating thick film; Thickness is 1mm; Surface area is 10cmm*10cm; Civil power; Continue energising 600 seconds.
PTFE base electric heating thick film surface resistivity:
Embodiment 1:158 Ω, embodiment 2:150 Ω, embodiment 3:148 Ω.
PTFE base electric heating thick film power:
Embodiment 1:306W, embodiment 2:322W, embodiment 3:327W.
PTFE base electric heating thick film surface heating temp:
Embodiment 1: normal temperature to 178 ℃.
Embodiment 2: normal temperature to 185 ℃.
Embodiment 3: normal temperature to 191 ℃.
PTFE base electric heating thick coating film adhesive force (cross-hatching):
Embodiment 1:95, embodiment 2:98, embodiment 3:97.
In sum, effect of the present invention is significantly improved, and has practicality, meets each important document of patent of invention, so propose application for a patent for invention in accordance with the law.
Claims (6)
1. PTFE base electric heating thick film is characterized in that: comprise the material that contains following weight percentage,
2. a kind of PTFE base electric heating thick film according to claim 1 is characterized in that: comprise the material that contains following weight percentage,
3. a kind of PTFE base electric heating thick film according to claim 1 and 2 is characterized in that: described short silk carbon fiber adopts PAN base chopped carbon fiber, and length is 1-2mm.
4. a kind of PTFE base electric heating thick film according to claim 1 and 2 is characterized in that: the polytetrafluoroethylene content in the described polytetrafluoroethyldispersion dispersion is 50-60% (wt).
5. a kind of PTFE base electric heating thick film according to claim 1 and 2 is characterized in that: described polytetrafluoroethylene diluent is that raw material is made into by distilled water and nonionic surface active agent.
6. the manufacturing approach of a PTFE base electric heating thick film is following according to claim 1 or 2 described a kind of PTFE base electric heating thick films and manufacturing technology steps thereof:
(1) described scale graphite, acetylene black, carbon fiber powder, short silk carbon fiber, nickel powder, silver powder, manganese dioxide, di-iron trioxide are got the raw materials ready according to percentage by weight, be placed on grinder and ground 1 hour, process homogeneous mixture.
(2) will grind the back homogeneous mixture and mix by weight percentage, and adopt ultrasonic echography to disperse 2 hours, be mixed with the slurry of PTFE base electric heating thick film with described carbon black dispersant, polytetrafluoroethyldispersion dispersion, polytetrafluoroethylene diluent.
(3) according to required electric thermal power demand; Through CAD plate-making; On corrosion resistant plate, carve out the resistive layer track pattern, adopt leakage printing process, the slurry of printing PTFE base electric heating thick film on the insulating substrate of cleaning surfaces drying; Levelling in air makes PTFE base electric heating thick film through technologies such as oven dry and sintering.
(4) on PTFE base electric heating thick film, print anti-oxidant heatproof insulating coating at last, behind oven dry and the sintering, promptly get PTFE base electric heating thick film finished product.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279604A (en) * | 2014-09-29 | 2015-01-14 | 高要市萨提亚新型建材科技有限公司 | Stone-plastic carbon fiber environment-friendly floor heating system |
| CN107555993A (en) * | 2017-09-06 | 2018-01-09 | 江正元 | A kind of low-temperature conductive plastic electric heating film and preparation method thereof |
| CN110167215A (en) * | 2019-06-17 | 2019-08-23 | 宁波凌光热材料科技有限公司 | A kind of preparation method of new far infrared electric heating film |
| CN111548589A (en) * | 2020-06-11 | 2020-08-18 | 四川大学 | High-filling-amount polytetrafluoroethylene composite film and preparation method thereof |
| CN113582668A (en) * | 2021-08-24 | 2021-11-02 | 中科传感(佛山)科技有限公司 | Full-printing preparation method of manganese nickel cobalt-based high-temperature-resistant flexible thermosensitive device |
| CN113878835A (en) * | 2021-12-08 | 2022-01-04 | 国家电投集团氢能科技发展有限公司 | Polytetrafluoroethylene/carbon fiber composite release film and preparation method and application thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279604A (en) * | 2014-09-29 | 2015-01-14 | 高要市萨提亚新型建材科技有限公司 | Stone-plastic carbon fiber environment-friendly floor heating system |
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| CN111548589A (en) * | 2020-06-11 | 2020-08-18 | 四川大学 | High-filling-amount polytetrafluoroethylene composite film and preparation method thereof |
| CN113582668A (en) * | 2021-08-24 | 2021-11-02 | 中科传感(佛山)科技有限公司 | Full-printing preparation method of manganese nickel cobalt-based high-temperature-resistant flexible thermosensitive device |
| CN113878835A (en) * | 2021-12-08 | 2022-01-04 | 国家电投集团氢能科技发展有限公司 | Polytetrafluoroethylene/carbon fiber composite release film and preparation method and application thereof |
| CN113878835B (en) * | 2021-12-08 | 2022-03-08 | 国家电投集团氢能科技发展有限公司 | Polytetrafluoroethylene/carbon fiber composite release film and preparation method and application thereof |
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Application publication date: 20121212 |