CN101353876B - Paper surface electrostatic painting process and special high pressure electrostatic painting system therefor - Google Patents
Paper surface electrostatic painting process and special high pressure electrostatic painting system therefor Download PDFInfo
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- CN101353876B CN101353876B CN2007100939895A CN200710093989A CN101353876B CN 101353876 B CN101353876 B CN 101353876B CN 2007100939895 A CN2007100939895 A CN 2007100939895A CN 200710093989 A CN200710093989 A CN 200710093989A CN 101353876 B CN101353876 B CN 101353876B
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Abstract
The invention discloses a paper surface electrostatic spraying technology which includes the following steps: (1) a working electric field is firstly established and connected with a negative high voltage electrode by a spray gun to form a high voltage negative electrode; a metal plate is additionally made to form a positive electrode after grounding; (2) spraying coating is prepared; and (3) paper is caused to move clinging to a positive metal plate in an electric field formed by two electrodes. The spraying coating is input into the spray gun and charged coating particles sprayed from the spray gun move to the positive metal plate under the action of a high-voltage electric field and are accepted by the paper and then deposited on the surface of the paper to form a coating layer. In addition, the invention also discloses a specific high-voltage electrostatic spraying system of the technology. The technology and the system of the invention can realize the coating of pigment with comparatively large particle size and the prepared paper has good glossiness, good scintillation effect, high utilization rate of the coating, uniform and smooth coating surface, and little fly ash, thereby being applicable to bulk production.
Description
Technical field
The present invention relates to a kind of coating process of paper surface, relate in particular to a kind of electrostatic painting process of paper surface, also can be used for the surface coated of non-conductive coiled material (as fabric, book film etc.); In addition, the invention still further relates to the high pressure electrostatic painting system that is exclusively used in above-mentioned technology.
Background technology
Utilize novel effect material (as pearl essence, flashlight powder etc.) that paper surface is coated with and increase artistic effect can for the paper surface, using more at present is to adopt pearl essence that paper surface is coated with, thereby produces iridescent paper.
Concrete coating process is with a certain amount of pearl essence, adds to be mixed with pearly coating in the resin, adopts the method for intaglio printing that paper is carried out coating and printing.The characteristics of this technology be coating quantitatively accurately, speed is fast, efficient is high, because of the depression size of intaglio plate, the solid particle that can hold corresponding particle diameter is among coating and do not influence coating quality.
The pearl essence particle diameter is between 15um-60um in actual use, can be coated with the gravure roller of collinear number not.
Characteristics of pearl essence are that particle diameter is thick more, and gloss is good more, and flicker effect is just strong more.Yet, though particle diameter is effective greater than the pearl essence of 100um, be coated with the notch board roller the depression space size restrictions and can't use (general, the pocket depth of notch board roller is within 30um).Therefore, according to the coating process in the existing sheet processing, be difficult to the decorative pigment that particle diameter is bigger and coat on the paper, the flicker effect of the pearly-lustre paper of production is unsatisfactory.So, we expect adopting the method for spraying, through test, prove the coating that can realize greater particle size pigment with the method for spraying, but, the problem that exists is, utilization efficiency of coatings is very low, and coated face can't even smooth unanimity, the space flying dust is many, can't produce in batches, therefore, study a kind of spraying coating process and overcome above problem and be very important.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of paper surface electrostatic painting process method, can realize the coating of greater particle size pigment, and the paper gloss of production is good, flicker effect is strong, and the utilization efficiency of coatings height, the even smooth unanimity of coated face, the space flying dust is few, can manufacture.For this reason, the present invention also provides a kind of high pressure electrostatic painting system that is exclusively used in above-mentioned technology.
For solving the problems of the technologies described above, the invention provides a kind of paper surface electrostatic painting process method, comprise the steps: that (1) set up an applied electric field earlier, this electric field connects negative high-voltage electrode with spray gun, forms high voltage negative; Other does a metallic plate, forms anodal after the ground connection; (2) preparation sprayed coating; (3) allow paper in the electric field that two electrodes form, be close to the motion of cathode metal plate, sprayed coating is imported spray gun, charged coating particle by the spray gun ejection under the effect of high voltage electric field, moves to the cathode metal plate, accepted to be deposited on paper surface by paper, form coating layer.
The operating voltage of applied electric field is between 60～90KV described in the step (1).
The described preparation sprayed coating of step (2) is specially: resin, solvent and coating pigment are hybridly prepared into sprayed coating.
Described resin is a vinyl chloride-vinyl acetate resin, and described solvent is butyl acetate and ethyl acetate, and the adding proportion of described resin and solvent is about 10 to 6, and described coating pigment is pearl essence, and the addition of described pearl essence is the 10%-25% of resin and solvent total amount.
The present invention also provides a kind of high pressure electrostatic painting system that is exclusively used in above-mentioned paper surface electrostatic painting process method, this system comprises: paper unwinding and rewinding device, drying unit, high pressure electrostatic painting device and supply application device, and described paper unwinding and rewinding device comprises coiler, unreels device; Described high pressure electrostatic painting device comprises forming after the spray gun that connects negative high-voltage electrode, the ground connection and forms an applied electric field between anodal metallic plate, spray gun and the metallic plate; Described supply application device comprises charging basket, pump and voltage-stablizer; Coating in the charging basket is transported to spray gun by pump and voltage-stablizer; Paper is by after unreeling device and unreeling, and is close to the metallic plate motion in the applied electric field that spray gun and metallic plate form, by the charged coating particle of spray gun ejection, and to the metallic plate motion, the spraying paper, paper is dried by drying unit then, enters coiler at last.
Coating in the described charging basket is transported to spray gun by pump and voltage-stablizer major part, and remainder is got back in the charging basket once more and reclaimed.
The area of described metallic plate and the paper breadth that will be coated with adapt.
Distance between described spray gun and the metallic plate is 200～250mm.
Described spray gun is single or multiple, and when adopting a plurality of spray gun, the distance between each spray gun is 1.5 times of single rifle spraying swath.
Described high pressure electrostatic painting device is set up two anti-dirty electrode wires in the metallic plate both sides, and this anti-dirty electrode wires is the positive pole of negative high-voltage electrode or ground connection.
Compared with prior art, beneficial effect of the present invention is: the present invention is mainly used in the paper coating of big particle diameter pigment.Adopt the present invention that paper is coated with, the paper gloss of production is good, and flicker effect is strong, improved the artistic effect of paper greatly, and the utilization efficiency of coatings height, the even smooth unanimity of coated face, the space flying dust is few, can manufacture, and provides a kind of brand-new selection to market.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the schematic diagram of corona discharge starting voltage and polar relationship in the Principle of Electrostatic Painting of the present invention;
Fig. 2 is the schematic diagram of electrostatic spraying in the paper surface coating process of the present invention;
Fig. 3 is the schematic diagram of the multi-cavity chamber voltage-stablizer among the present invention;
Fig. 4 is the structural representation of high pressure electrostatic painting system of the present invention;
Fig. 5 be among the present invention spray voltage and spray efficiency concern schematic diagram;
Fig. 6 be among the present invention anode-cathode distance and painting effect concern schematic diagram;
Fig. 7 is the cross-sectional distribution schematic diagram of coating layer among the present invention;
Fig. 8 is the schematic diagram that many spray guns are arranged among the present invention;
Fig. 9 is the schematic cross-section of spray gun rotary cup spray cup of the present invention.
The specific embodiment
Electrostatic spraying is at spray gun and is coated with high-voltage electrostatic field of formation between the workpiece, generally be coated with workpiece grounding for anodal, spray gun connects negative high voltage, and when electric field strength E was enough high, near the air the gun slot promptly produced corona discharge (corona discharge starting voltage and polar relationship are as shown in Figure 1), make air generation ionization, when coating particle by the gun slot band on electric charge become charged particle, just can be along direction of an electric field, towards being coated with workpiece motion s, be deposited on and be coated with surface of the work, form coating layer.
Because the workpiece paper that is coated with of the present invention is not a conductor, can't form positive pole by ground connection, just can't form effective electric field yet.Therefore, the present invention adopts following technical scheme: as shown in Figure 2, set up an applied electric field 2 earlier, this applied electric field 2 connects negative high-voltage electrode 3 with electrostatic gun mouth 1, forms high voltage negative; Other does a metallic plate 5, its area and paper 4 breadths that will be coated with adapt, form anodal after the ground connection, allow paper 4 in the electric field 2 that two electrodes form, be close to 5 motions of cathode metal plate, by the charged coating particle of electrostatic gun mouth 1 ejection, under the effect of high voltage electric field 2, move, accepted to be deposited on paper 4 surfaces to cathode metal plate 5, form coating layer by paper 4.The part coatings particle is retracted by positive pole again after leaping paper 4 edges, and wherein sub-fraction drops on paper 4 back sides, makes that paper 4 back side bands are dirty.For this reason, the present invention sets up 2 anti-dirty electrode wires 6 in metallic plate 5 both sides.Anti-dirty electrode wires 6 can be a negative high-voltage electrode, and the principle of utilizing the same sex to repel each other makes the motion of the coating particle that leaps paper 4 edges depart from paper 4, prevents that paper 4 back side bands are dirty.Anti-dirty electrode wires 6 also can be the positive pole of ground connection, the coating particle that leaps paper 4 edges is adsorbed on it and can not fall within paper 4 back sides, by experiment, the positive pole of ground connection is prevented dirty electrode wires 6, easy for installation, safety do not have harmful effect to the front coating, and effect is fine.
Electrostatic Spray Technology has certain dielectric constant requirement to coating, the end that coating is carried is that gun slot is a negative high-voltage electrode, from security standpoint, the present invention has abandoned the defeated material method by the motor drives dehvery pump, then the defeated material method of power is made in consideration of compressed air, comprehensive various scheme, the present invention adopts open paint can, and the moving membrane pump of distribution drives.
Open paint can is convenient to the interpolation at any time of coating, helps continuous production, and the membrane pump that air is used as power has been eliminated the possibility that motor is damaged by high-tension electricity, and this pump also has good anti-clogging function.
During practical application, because membrane pump is reciprocating motion, pulsation output, make the coating pressure that moves to gun slot that very big pressure reduction be arranged, cause coating weight with the membrane pump reciprocating motion not of uniform size causing, for this reason, through long-term experiment, finally successfully made multi-cavity chamber automatic voltage regulator, will effectively overcome behind this voltage-stablizer connecting system the pulsatile change of the coating pressure that produces during membrane pump work, make the quantity for spray stable and controllable that becomes.
As shown in Figure 3, multi-cavity chamber voltage-stablizer comprises a plurality of chamber A1 with pipeline A2 polyphone, and these a plurality of chamber A1 are fastened on the same dull and stereotyped A3, are provided with charging aperture A4 and discharging port A 5 in each chamber A1.The operation principle of this multi-cavity chamber voltage-stablizer is: when coating is admitted to first chamber, because the resistance that coating flows in pipeline exists, it can make the air in the chamber be subjected to elastic compression, air effect after the compression is coated with charge level in chamber, promote coating and discharge chamber by discharging opening, because the elasticity of compression of air in the chamber, cut down the pressure differential of membrane pump output, the coating of having cut down pressure differential is admitted to second chamber, second chamber repeated the process of first chamber, make the coating pressure difference in the course of conveying further cut down, be cut to the scope of coating process requirement by that analogy until pressure differential.As shown in Figure 3, the multi-cavity chamber voltage-stablizer that the present invention adopts has five chambers, can select according to different coating and spraying coating process, uses three chambers can satisfy the coating process requirement in the present invention.
The high pressure electrostatic painting system that the present invention is used for above-mentioned paper surface electrostatic painting process method as shown in Figure 4, this system comprises: paper unwinding and rewinding device, drying unit, high pressure electrostatic painting device and supply application device, and described paper unwinding and rewinding device comprises coiler B1, unreels device B2; Described high pressure electrostatic painting device comprises forming after the spray gun B3 (two spray guns are arranged among Fig. 4) that connects negative high-voltage electrode, the ground connection and forms an applied electric field between anodal metal plate B 4, spray gun B3 and the metal plate B 4; Described supply application device comprises charging basket B5, membrane pump B6 and multi-cavity chamber voltage-stablizer B7; Coating among the charging basket B5 is transported to spray gun B3 by membrane pump B6 (entrance pressure contract air) and multi-cavity chamber voltage-stablizer B7; Paper is by after unreeling device B2 and unreeling, and is close to metal plate B 4 motions in the applied electric field that spray gun B3 and metal plate B 4 form, by the charged coating particle of spray gun B3 ejection, to metal plate B 4 motions, the spraying paper, paper enters coiler B1 at last by drying unit B8 oven dry then.
Wherein, the coating among the charging basket B5 is transported to spray gun B3 by membrane pump B6 and multi-cavity chamber voltage-stablizer B7 major part, and remainder is got back to once more among the charging basket B5 and reclaimed.
Systematic parameter is as follows:
A, voltage
Electrostatic spraying voltage is a crucial parameter, spray efficiency only about 20% when voltage is lower than 40KV as shown in Figure 5, along with voltage raises, spraying effect raises rapidly, coating efficiency can reach 80% when 60KV, the voltage coating efficiency that raises again changes and to be tending towards saturated, the danger that excessive high voltage may occur being broken down by high-voltage, operating voltage of the present invention are between 60～90KV, and preferred 90KV is as the operating voltage of system.
B, spray gun and be coated with the distance of paper
Fig. 6 be among the present invention anode-cathode distance and painting effect concern schematic diagram.The 10KV electric field action can be carried in general 1CM airspace, the present invention selects the electric-field intensity of 90KV, then anode-cathode distance (being spray gun and the distance that is coated with paper) must not be less than 9CM, be lower than this distance and just have the possibility that interpolar punctures the generation fire, general metal is coated with workpiece must get 3 times safety coefficient, but the workpiece that is coated with of the present invention is a paper, through experiment, selects 2-2.5 safety coefficient.Spray gun of the present invention and the distance that is coated with between the paper (or metallic plate) are 200～250mm.
The layout of C, spray gun
The spray cup of spray gun of the present invention adopts rotary cup spray cup, and its spray trajectory is a hollow circular ring, the cross-sectional distribution situation that forms coating at surface of the work as shown in Figure 7, effective spraying swath of single rifle spraying reaches 620mm.Because the breadth restriction of single rifle spraying, bigger paper spraying can be adopted the spray of multiple gun connection to fabric width, and the distance between rifle and the rifle generally can be grasped 1.5 times at single rifle spraying swath, specifically can carry out with reference to method shown in Figure 8.
D, spray rim of a cup footpath
The relation of coating particle radius r and rotary cup spray rim of a cup footpath R as shown in the formula:
In the formula, R-revolves a glass radius (as shown in Figure 9), E-electric-field intensity, the surface tension of σ-coating, the dielectric constant of ε-coating, β-the revolve angle (as shown in Figure 9) of cup-and-cone face and level, W
c-total quantity for spray, r-coating particle radius.
By following formula as seen, the radius that revolves cup is big more, and then coating particle is thin more, but hollow area is also just big more thereupon, therefore should determine the fashionable rim of a cup footpath of revolving according to actual conditions.The rim of a cup that revolves of the present invention is directly selected 60mm.
E, revolve a glass speed
The primary atomization of coating mainly relies on the action of centrifugal force of the high speed rotation generation of revolving cup in the rotary cup electrostatic coating system, and secondly under the effect of high-voltage electrostatic field, coating particle is further by electrostatic atomization.
Coating atomizing is very important link during electrostatic spraying, and in order to guarantee atomizing effect, it is high more good more to revolve glass speed, but too high unfavorable its abundant electric charge in the corona zone of movement velocity of coating particle influences spraying effect.
Therefore should be according to the caliber size of spray cup, electric-field intensity, the dielectric constant of coating is determined the suitable glass speed of revolving, to obtain best spraying effect.Revolving glass speed, to look actual coating effect adjustable between 3000～10000 rev/mins.
F, dope viscosity
Coating generally is that the viscosity high atomization performance that heals is poorer, spray efficiency is had a negative impact, but consider from qualitative factor, improve the coating solid content, viscosity can raise, but can improve gloss and richness, so take all factors into consideration, dope viscosity can be grasped at 15～20S (being coated with-4 glasss).
The electrical property of G, coating
According to the principle of electrostatic spraying, the ability of coating particle charged lotus in electric field is relevant with the electrical property of coating, its major parameter---dielectric constant.The polarity of common coating is very low, and its impedance can adapt to the needs of electrostatic spraying often greater than 100M Ω for making coating, must adjust the impedance of coating with the higher solvent of dielectric constant, makes it between 5～50M Ω.
The solvent properties of coating commonly used sees the following form:
Electrostatic spraying common solvent characteristic
| Classification | The solvent title | Resistivity/M Ω .cm | Dielectric constant (ε) | Boiling point/℃ | Flash-point/℃ | Surface tension/(* 10 -3N/m) |
| Alcohols | Methyl alcohol n-butanol ethanol DAA phenmethylol isopropyl alcohol | 0.621.41.92.83.220 | 32.117.424.327.514.520.4 | 64.5117.378.3169.2205.082.3 | 123714609612 | 22.624.822.331.423.8 |
| Ketone | MEK (MEK) isophorone methyl iso-butyl ketone (MIBK) (MIBK) cyclohexanone | 7.7182139 | 19.520.514.118.2 | 79.6215.2116.0156.7 | -5921647 | 24.235.2 |
| The ester class | Butyl glycol ether butyl acetate ethylene glycol ethyl ether acid esters ethylene glycol ethyl ether | 14177085 | 9.55.18.014.7 | 171.2126.1156.3153.1 | 61275243 | 25.2 |
| Aromatics | Toluene dimethylbenzene | 2.8×10 31.8×10 4 | 2424 | 109.9～110.4138.2～139.9 | 527 | 28.523.8 |
Preparation sprayed coating: resin vinyl chloride-vinyl acetate resin 100 grams, solvent butyl acetate and ethyl acetate 60 grams and pearl essence 16 grams are hybridly prepared into sprayed coating.Adopt above-mentioned high pressure electrostatic painting system, allow paper in the applied electric field of spray gun and metallic plate formation, be close to the motion of cathode metal plate, the operating voltage of this applied electric field is 90KV, distance between spray gun and the metallic plate is 200mm, spray gun revolves rim of a cup and directly is 60mm, and glass speed of revolving is 3000 rev/mins.With the sprayed coating input spray gun of above-mentioned preparation, by the charged coating particle of spray gun ejection, under the effect of high voltage electric field,, accepted to be deposited on paper surface by paper to the motion of cathode metal plate, form coating layer.
Preparation sprayed coating: resin vinyl chloride-vinyl acetate resin 200 grams, solvent butyl acetate and ethyl acetate 120 grams and pearl essence 80 grams are hybridly prepared into sprayed coating.Adopt above-mentioned high pressure electrostatic painting system, allow paper in the applied electric field of spray gun and metallic plate formation, be close to the motion of cathode metal plate, the operating voltage of this applied electric field is 60KV, distance between spray gun and the metallic plate is 250mm, spray gun revolves rim of a cup and directly is 60mm, and glass speed of revolving is 10000 rev/mins.With the sprayed coating input spray gun of above-mentioned preparation, by the charged coating particle of spray gun ejection, under the effect of high voltage electric field,, accepted to be deposited on paper surface by paper to the motion of cathode metal plate, form coating layer.
Preparation sprayed coating: resin vinyl chloride-vinyl acetate resin 300 grams, solvent butyl acetate and ethyl acetate 180 grams and pearl essence 96 grams are hybridly prepared into sprayed coating.Adopt above-mentioned high pressure electrostatic painting system, allow paper in the applied electric field of spray gun and metallic plate formation, be close to the motion of cathode metal plate, the operating voltage of this applied electric field is 80KV, distance between spray gun and the metallic plate is 220mm, spray gun revolves rim of a cup and directly is 60mm, and glass speed of revolving is 5000 rev/mins.With the sprayed coating input spray gun of above-mentioned preparation, by the charged coating particle of spray gun ejection, under the effect of high voltage electric field,, accepted to be deposited on paper surface by paper to the motion of cathode metal plate, form coating layer.
Claims (7)
1. a paper surface electrostatic painting process method is characterized in that, comprises the steps:
(1) set up an applied electric field earlier, this electric field connects negative high-voltage electrode with spray gun, forms high voltage negative; Other does a metallic plate, forms anodal after the ground connection; (2) resin, solvent and coating pigment are hybridly prepared into sprayed coating, described resin is a vinyl chloride-vinyl acetate resin, described solvent is butyl acetate and ethyl acetate, described resin is 10 to 6 with the adding proportion of solvent, described coating pigment is pearl essence, and the addition of described pearl essence is the 10%-25% of resin and solvent total amount; (3) allow paper in the electric field that two electrodes form, be close to the motion of cathode metal plate, sprayed coating is imported spray gun, charged coating particle by the spray gun ejection under the effect of high voltage electric field, moves to the cathode metal plate, accepted to be deposited on paper surface by paper, form coating layer.
2. paper surface electrostatic painting process method according to claim 1 is characterized in that, the operating voltage of applied electric field is between 60～90kV described in the step (1).
3. high pressure electrostatic painting device that is exclusively used in claim 1 or 2 described paper surface electrostatic painting process methods, it is characterized in that, this device comprises: paper unwinding and rewinding device, drying unit, high pressure electrostatic painting device and supply application device, and described paper unwinding and rewinding device comprises coiler, unreels device; Described high pressure electrostatic painting device comprises forming after the spray gun that connects negative high-voltage electrode, the ground connection and forms an applied electric field between anodal metallic plate, spray gun and the metallic plate; Described high pressure electrostatic painting device is provided with two anti-dirty electrode wires in the metallic plate both sides, and this anti-dirty electrode wires is the positive pole of negative high-voltage electrode or ground connection; Described supply application device comprises charging basket, pump and voltage-stablizer; Coating in the charging basket is transported to spray gun by pump and voltage-stablizer; Paper is by after unreeling device and unreeling, and is close to the metallic plate motion in the applied electric field that spray gun and metallic plate form, by the charged coating particle of spray gun ejection, and to the metallic plate motion, the spraying paper, paper is dried by drying unit then, enters coiler at last.
4. high pressure electrostatic painting device as claimed in claim 3 is characterized in that, the coating in the described charging basket is transported to spray gun by pump and voltage-stablizer major part, and remainder is got back in the charging basket once more and reclaimed.
5. high pressure electrostatic painting device as claimed in claim 3 is characterized in that, the area of described metallic plate and the paper breadth that will be coated with adapt.
6. high pressure electrostatic painting device as claimed in claim 3 is characterized in that, the distance between described spray gun and the metallic plate is 200～250mm.
7. high pressure electrostatic painting device as claimed in claim 3 is characterized in that, described spray gun is single or multiple, and when adopting a plurality of spray gun, the distance between each spray gun is 1.5 times of single rifle spraying swath.
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| CN2007100939895A CN101353876B (en) | 2007-07-27 | 2007-07-27 | Paper surface electrostatic painting process and special high pressure electrostatic painting system therefor |
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| CN2007100939895A CN101353876B (en) | 2007-07-27 | 2007-07-27 | Paper surface electrostatic painting process and special high pressure electrostatic painting system therefor |
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|---|---|---|---|---|
| CN102806158A (en) * | 2011-05-30 | 2012-12-05 | 张家港市佳龙真空浸漆设备制造厂 | Electrostatic paint spray equipment with retainer cup structure |
| CN102806159A (en) * | 2011-05-30 | 2012-12-05 | 张家港市佳龙真空浸漆设备制造厂 | Continuous electrostatic painting equipment |
| CN102806161A (en) * | 2011-05-30 | 2012-12-05 | 张家港市佳龙真空浸漆设备制造厂 | Continuous electrostatic painting equipment for non-conductive coiled materials |
| CN102806160A (en) * | 2011-06-02 | 2012-12-05 | 张家港市佳龙真空浸漆设备制造厂 | Electrostatic paint spray equipment |
| JP5787223B2 (en) * | 2011-09-20 | 2015-09-30 | いすゞ自動車株式会社 | Electrostatic coating method and electrostatic coating gun |
| CN104594126A (en) * | 2015-01-14 | 2015-05-06 | 深圳市美盈森环保科技股份有限公司 | Process method for baking and molding surface of paperboard |
| CN105568766B (en) * | 2015-12-16 | 2017-11-10 | 青岛大学 | A kind of paper document is guaranteed the quality processing method |
| CN105568757B (en) * | 2015-12-16 | 2017-09-29 | 青岛大学 | A kind of paper document is guaranteed the quality liquid |
| CN105568756B (en) * | 2015-12-16 | 2017-09-29 | 青岛大学 | A kind of paper document is guaranteed the quality liquid and preparation method thereof |
| CN105344510B (en) * | 2015-12-16 | 2017-11-14 | 青岛大学 | A kind of paper document is guaranteed the quality processing unit |
| CN108511610B (en) * | 2018-03-21 | 2021-11-30 | 南京大学昆山创新研究院 | Preparation method and device of full-spraying perovskite solar cell |
| CN113601973A (en) * | 2021-08-06 | 2021-11-05 | 长胜纺织科技发展(上海)有限公司 | Moistening processing equipment and moistening processing method |
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| CN1074395A (en) * | 1991-10-10 | 1993-07-21 | 帝国化学工业公司 | The electrostatic spraying apparatus of liquid and method thereof |
| CN2541061Y (en) * | 2002-04-10 | 2003-03-26 | 崔晓序 | Electrostatic coating controller |
| CN1516624A (en) * | 2001-04-24 | 2004-07-28 | 3M | Electrostatic spray coating apparatus and method |
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- 2007-07-27 CN CN2007100939895A patent/CN101353876B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074395A (en) * | 1991-10-10 | 1993-07-21 | 帝国化学工业公司 | The electrostatic spraying apparatus of liquid and method thereof |
| CN1516624A (en) * | 2001-04-24 | 2004-07-28 | 3M | Electrostatic spray coating apparatus and method |
| CN2541061Y (en) * | 2002-04-10 | 2003-03-26 | 崔晓序 | Electrostatic coating controller |
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