CN103789712B - Plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil - Google Patents
Plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil Download PDFInfo
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- CN103789712B CN103789712B CN201410039245.5A CN201410039245A CN103789712B CN 103789712 B CN103789712 B CN 103789712B CN 201410039245 A CN201410039245 A CN 201410039245A CN 103789712 B CN103789712 B CN 103789712B
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Abstract
The invention discloses a kind of method that plasma spraying polymer compound PTC powder prepares double-faced flexible aluminium foil, comprise the following steps: (1) prepares polymer compound PTC powder; (2) by heating unit, aluminium foil is heated to 100-300 DEG C, utilizes the plasma-spraying device polymer compound PTC powder that applying step (1) is obtained on aluminium foil, aluminium foil is formed polymer compound PTC powder coating; (3) aluminium foil of baking procedure (2) coated polymer compound PTC powder coating, obtains double-faced flexible aluminium foil through recrystallize technique.Compared with prior art, the course of processing of the present invention is easy, can enhance productivity and acceptance rate, and product thickness consistence is strong, and the qualitative reliability of obtained double-faced flexible PTC aluminium foil is high, and thermosensitive response speed is fast, accurate and capacity is easy to adjust.
Description
Technical field
The present invention relates to the preparation method of double-faced flexible aluminium foil, particularly relate to a kind of method that plasma spraying polymer compound PTC powder prepares double-faced flexible aluminium foil.
Background technology
Along with the develop rapidly of science and technology, social every profession and trade is matrix material, electronic material particularly, and the demand to functional aluminium foil such as decorative material increases day by day.Functional aluminium foil has become the critical material of PCB playing support, the effect of interconnection components and parts in the functional energy and electronic system product at present, it be called electronic product signal and power transmission, communication " neural network ".Aluminium foil is as the base mateiral of electronic industry, and its development follows the development of PCB technology always, and PCB technology is then along with the with rapid changepl. never-ending changes and improvements of electronic product improves constantly.The development of IT product technology facilitates PCB towards multiple stratification, slimming, densification, high speed, highly reliableization, functionalization future development, therefore develop more have high-performance, high quality, high reliability, functionalization aluminium foil market prospect boundless.
From nineteen fifty Philips company of Holland the people such as Heyman find the ceramic semiconductor of BaTiO3 system after can obtain positive temperature coefficient (PTC) characteristic since, the understanding of people to it is more and more deep.Meanwhile, also just increasingly extensive in its application aspect, penetrate into the every field such as daily life, industrial or agricultural technology, military science, communication, aerospace.PTC thermistor Heating element is the modern product down to high-tech tip in future.It is widely used in light industry, house, traffic, space flight, agricultural, medical treatment, environmental protection, mining, civilian apparatus etc., and it compared with Heating element, has remarkable advantage with nickel, chromium silk or far infrared etc.When PTC element applies interchange or volts DS heats up, below Curie-point temperature, resistivity is very low; When once surmount Curie-point temperature, resistivity increases suddenly, makes its electric current drop to stationary value, reaches A.T.C, constant temperature object.Not rubescent during PTC element heating, the flames of anger (resistance wire is rubescent and have naked light), nonflammable.During PTC component ambient temperature exceeds limit value, its power drops to equilibrium value automatically, can not produce danger of combustion.The energy input adoption rate formula of PTC element, current limiting effect, also saves electric power than the switched attenuator switched-mode energy input of the Heating elements such as nichrome wire.Ptc material has macromolecular material class and ceramic-like two kinds, and ceramic-like PTC element is originally as oxide compound, and the high temperature oxidation drawback of Ni-Cr free silk, also do not have the frangible phenomenon of infrared tube, the life-span is long.And multi-hole type is longer than the anapsid life-span.PTC element itself is temperature automatically controlled, does not need separately to add A.T.C line unit.Multi-hole type PTC does not more need other heat abstractors, does not need to use conductive resin yet.PTC element can normally use under low pressure (6-36 volt) and high pressure (110-240 volt).Low pressure PTC element is applicable to all kinds of low voltage heater, instrument low temp compensating, the well heater on automobile and on computer peripheral device.High pressure P TC element is applicable to the heating of following electric installation: electric thermal-insulation plate, shoe baking device, thermosol gelgun, electric cooker, electric shoes, electric mosquito heater, intravenous injection is heated, light-weight plastic closing machine, steam hair comb, steam generator, humidifier, curler, videocorder, duplicating machine, vending machine, hot-air screen, hand warmer, tea drier, Water pipe heating device, travelling clothes-drying machine, finish-baking room for automobile, liquefied gas bottle well heater, shower, beauty care device, Electric heating table, baby bottle thermostat, electric heating moxibustion instrument, electric hot water bottle, electric blanket etc.
The appearance of ptc material, the problem of the fast not and large not these two aspects of capacity of the speed that can solve traditional switch.Along with the development of science and technology and updating of technique, the characteristic of PTC element will be more and more perfect, its normality can will be further improved by galvanization, a field technology revolution of traditional switch may be caused in AC and DC field, linear quadratic control equipment is also had a wide range of applications, it will reduce the manufacturing cost of electronics greatly, improves economy, reliability that electronic system is run.
Ptc material processing is due to barium titanate ceramics material, and it is more difficult that tradition processing homogeneity controls, and limits the application of ptc material.
Tradition preparation PTC components and parts are due to the restriction of technique, and PTC components and parts and electrode are processed respectively, then weld with pole plate or are cemented to device, based on Miniature component, there are no the report of jumbo ultra-thin function aluminium foil processing.
Summary of the invention
For problems of the prior art, the invention provides a kind of method that plasma spraying polymer compound PTC powder prepares double-faced flexible aluminium foil, the method course of processing is easy, can enhance productivity and acceptance rate.
For achieving the above object, the present invention is by the following technical solutions:
Plasma spraying polymer compound PTC powder prepares a method for double-faced flexible aluminium foil, comprises the following steps: (1) prepares polymer compound PTC powder; (2) by heating unit, aluminium foil is heated to 100-300 DEG C, utilizes the plasma-spraying device polymer compound PTC powder that applying step (1) is obtained on aluminium foil, aluminium foil is formed polymer compound PTC powder coating; (3) aluminium foil of baking procedure (2) coated polymer compound PTC powder coating, obtains double-faced flexible aluminium foil through recrystallize technique.
Described step (1) polymer is polypropylene, polyethylene, polyvinyl chloride, polyester, polyvinylidene difluoride (PVDF), polyimide, polymeric amide, epoxy resin, urethane, polyethers or acrylate.
The barium titanate micro mist that described step (1) PTC powder is carbon black, carbon fiber, graphite flake, silver, aluminium flake, silver-colored alclad nano particle, barium titanate micro mist, leaded mass percent are 0.3-1.5% or be the barium titanate micro mist of 0.5-2.2% containing strontium mass percent.
In described step (1), polymer and PTC powder carry out compound with the ratio of 1:10-10:1, adopt screw machine or ball mill to carry out composite.
In described step (2), aluminium foil is electrolytic aluminum foil or hot pressing aluminium foil, and the thickness of aluminium foil is 3-70 μm.
The thickness of the polymer compound PTC powder coating in described step (2), aluminium foil formed is 1-10 μm.
Recrystallize technological process be that the aluminium foil that step (2) obtains is carried out recrystallize according to the Tc of different macromolecular materials in imperial kiln in described step (3), and each humidity province heat-up time is 10-20 minute.
If polyethylene kind is successively through 80 DEG C, 130 DEG C, 90 DEG C, 30 DEG C of humidity provinces are heated; Polypropylene-base experiences 80 DEG C successively, 150 DEG C, 90 DEG C, and 30 DEG C of humidity provinces are heated; Polyimide experiences 180 DEG C successively, 290 DEG C, 190 DEG C, and 130 DEG C are heated; Polyester experiences 180 DEG C successively, 250 DEG C, 190 DEG C, and 130 DEG C are heated, complete recrystallization process.
The thickness of the double-faced flexible aluminium foil that described step (3) is obtained is 5-90 μm.
Compared with prior art, the course of processing of the present invention is easy, can enhance productivity and acceptance rate, and product thickness consistence is strong, and the qualitative reliability of obtained double-faced flexible PTC aluminium foil is high, and thermosensitive response speed is fast, accurate and capacity is easy to adjust; The present invention take ultra-thin aluminum foil as base material, utilize plasma spray technology, process one deck ptc material respectively on aluminium foil two sides, form double-faced flexible PTC aluminium foil functional material, meet the application demand of the every field such as daily life, industrial or agricultural technology, military science, communication, aerospace.
Accompanying drawing explanation
Fig. 1 is spraying coating process schema of the present invention.
Fig. 2 is recrystallize process flow sheet of the present invention.
Embodiment
Embodiment 1
As depicted in figs. 1 and 2, the present embodiment plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil, comprises the following steps: (1) gets 100g polyethylene and 100g carbon black, puts into ball mill under nitrogen protection, ball milling mixes 5 hours, obtained polymer compound PTC powder; (2) be that the electrolytic aluminum foil of 5 μm is released through unwinding device 1 by thickness, by heating unit 2, the electrolytic aluminum foil of releasing is heated to 100 ° of C, fabric width 1.3 meters, on the plasma body coating machine 3 of long 5 meters, with the speed continuously coating 600 meters of 50 ms/min, it is 2.5 μm that the flowrate control valve 4 be provided with by plasma body coating machine controls polymer compound PTC powder coating thickness, through refrigerating unit 5 crystallisation by cooling, then enter wrap-up 6, complete the double-sided plasma body spraying of polymer compound PTC powder on electrolytic aluminum foil; (3) electrolytic aluminum foil in wrap-up is batched out in the imperial kiln being contained in 10 meters long, experience 80 DEG C successively, 130 DEG C, 90 DEG C, 30 DEG C are heated, each humidity province respectively toasts 10 minutes, cooling, completes recrystallize processing, and obtained package 600 meters is long, fabric width 1.3 meters, thickness is the double-faced flexible electrolytic aluminum foil of 10 μm.
Embodiment 2
The present embodiment plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil, comprise the following steps: (1) gets 10g polypropylene and 100g barium titanate micro mist, put into three screw rod blending reaction devices under nitrogen protection, mix 4 hours, obtained polymer compound PTC powder; (2) be that the electrolytic aluminum foil of 3 μm is released through unwinding device by thickness, by heating unit, the electrolytic aluminum foil of releasing is heated to 220 ° of C, fabric width 1.3 meters, on the plasma body coating machine of long 5 meters, with the speed continuously coating 600 meters of 50 ms/min, it is 1 μm that the flowrate control valve be provided with by plasma body coating machine controls polymer compound PTC powder coating thickness, through refrigerating unit crystallisation by cooling, then enter wrap-up, complete the double-sided plasma body spraying of polymer compound PTC powder on electrolytic aluminum foil; (3) electrolytic aluminum foil in wrap-up is batched out in the imperial kiln being contained in 10 meters long, experience 80 DEG C successively, 150 DEG C, 90 DEG C, 30 DEG C are heated, each humidity province respectively toasts 15 minutes, cooling, completes recrystallize processing, and obtained package 600 meters is long, fabric width 1.3 meters, thickness is the double-faced flexible electrolytic aluminum foil of 5 μm.
Embodiment 3
The present embodiment plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil, comprise the following steps: (1) gets the barium titanate micro mist that 50g polyimide and the leaded mass percent of 100g are 0.3%, put into three screw rod blending reaction devices under nitrogen protection, mix 5 hours, obtained polymer compound PTC powder; (2) be that the hot pressing aluminium foil of 15 μm is released through unwinding device by thickness, by heating unit, the hot pressing aluminium foil of releasing is heated to 250 ° of C, fabric width 1.3 meters, on the plasma body coating machine of long 5 meters, with the speed continuously coating 600 meters of 50 ms/min, it is 2.5 μm that the flowrate control valve be provided with by plasma body coating machine controls polymer compound PTC powder coating thickness, through refrigerating unit crystallisation by cooling, then enter wrap-up, complete the double-sided plasma body spraying of polymer compound PTC powder on hot pressing aluminium foil; (3) the hot pressing aluminum foil coil taking-up in wrap-up is contained in the imperial kiln of 10 meters long, experience 180 DEG C successively, 290 DEG C, 190 DEG C, 130 DEG C are heated, each humidity province respectively toasts 12 minutes, cooling, completes recrystallize processing, and obtained package 600 meters is long, fabric width 1.3 meters, thickness is the double-faced flexible hot pressing aluminium foil of 20 μm.
Embodiment 4
The present embodiment plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil, comprise the following steps: (1) gets the barium titanate micro mist that 100g polyimide and the leaded mass percent of 10g are 1.0%, put into three screw rod blending reaction devices under nitrogen protection, mix 5 hours, obtained polymer compound PTC powder; (2) be that the hot pressing aluminium foil of 70 μm is released through unwinding device by thickness, by heating unit, the hot pressing aluminium foil of releasing is heated to 270 ° of C, fabric width 1.3 meters, on the plasma body coating machine of long 5 meters, with the speed continuously coating 600 meters of 50 ms/min, it is 10 μm that the flowrate control valve be provided with by plasma body coating machine controls polymer compound PTC powder coating thickness, through refrigerating unit crystallisation by cooling, then enter wrap-up, complete the double-sided plasma body spraying of polymer compound PTC powder on hot pressing aluminium foil; (3) the hot pressing aluminum foil coil taking-up in wrap-up is contained in the imperial kiln of 10 meters long, experience 180 DEG C successively, 290 DEG C, 190 DEG C, 130 DEG C are heated, each humidity province respectively toasts 18 minutes, cooling, completes recrystallize processing, and obtained package 600 meters is long, fabric width 1.3 meters, thickness is the double-faced flexible hot pressing aluminium foil of 90 μm.
Embodiment 5
The present embodiment plasma spraying polymer compound PTC powder prepares the method for double-faced flexible aluminium foil, comprise the following steps: (1) gets 100g polyester and 100g carbon fiber, put into three screw rod blending reaction devices under nitrogen protection, mix 5 hours, obtained polymer compound PTC powder; (2) be that the electrolytic aluminum foil of 30 μm is released through unwinding device by thickness, by heating unit, the electrolytic aluminum foil of releasing is heated to 300 ° of C, fabric width 1.3 meters, on the plasma body coating machine of long 5 meters, with the speed continuously coating 600 meters of 50 ms/min, it is 5 μm that the flowrate control valve be provided with by plasma body coating machine controls polymer compound PTC powder coating thickness, through refrigerating unit crystallisation by cooling, then enter wrap-up, complete the double-sided plasma body spraying of polymer compound PTC powder on electrolytic aluminum foil; (3) electrolytic aluminum foil in wrap-up is batched out in the imperial kiln being contained in 10 meters long, experience 180 DEG C successively, 250 DEG C, 190 DEG C, 130 DEG C are heated, each humidity province respectively toasts 20 minutes, cooling, completes recrystallize processing, and obtained package 600 meters is long, fabric width 1.3 meters, thickness is the double-faced flexible electrolytic aluminum foil of 40 μm.
Claims (3)
1. plasma spraying polymer compound PTC powder prepares a method for double-faced flexible aluminium foil, it is characterized in that comprising the following steps: (1) prepares polymer compound PTC powder; (2) by heating unit, aluminium foil is heated to 100-300 DEG C, utilizes the plasma-spraying device polymer compound PTC powder that applying step (1) is obtained on aluminium foil, aluminium foil is formed polymer compound PTC powder coating; (3) aluminium foil of baking procedure (2) coated polymer compound PTC powder coating, obtains double-faced flexible aluminium foil through recrystallize technique;
In described step (1), polymer and PTC powder carry out compound with the ratio of 1:10-10:1, adopt screw machine or ball mill to carry out composite;
In described step (2), aluminium foil is electrolytic aluminum foil or hot pressing aluminium foil, and the thickness of aluminium foil is 3-70 μm;
The thickness of the polymer compound PTC powder coating in described step (2), aluminium foil formed is 1-10 μm;
Recrystallize technological process be that the aluminium foil that step (2) obtains is carried out recrystallize according to the Tc of different macromolecular materials in imperial kiln in described step (3), and each humidity province heat-up time is 10-20 minute;
The thickness of the double-faced flexible aluminium foil that described step (3) is obtained is 5-90 μm.
2. plasma spraying polymer compound PTC powder according to claim 1 prepares the method for double-faced flexible aluminium foil, it is characterized in that: described step (1) polymer is polypropylene, polyethylene, polyvinyl chloride, polyester, polyvinylidene difluoride (PVDF), polyimide, polymeric amide, epoxy resin, urethane, polyethers.
3. plasma spraying polymer compound PTC powder according to claim 1 prepares the method for double-faced flexible aluminium foil, it is characterized in that: the barium titanate micro mist that described step (1) PTC powder is carbon black, carbon fiber, graphite flake, silver, aluminium flake, silver-colored alclad nano particle, barium titanate micro mist, leaded mass percent are 0.3-1.5% or be the barium titanate micro mist of 0.5-2.2% containing strontium mass percent.
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