CN101648179A - Method for drying coating film - Google Patents
Method for drying coating film Download PDFInfo
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- CN101648179A CN101648179A CN200910173359A CN200910173359A CN101648179A CN 101648179 A CN101648179 A CN 101648179A CN 200910173359 A CN200910173359 A CN 200910173359A CN 200910173359 A CN200910173359 A CN 200910173359A CN 101648179 A CN101648179 A CN 101648179A
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- chute
- coldplate
- flexible thin
- thin film
- coated film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
- B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
- F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Drying Of Solid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
The invention provides a method for drying a coating film, capable of preventing drops from dewing in a trough or on the surface of the trough and the dewed drops from causing the defect of the coating film. The method includes: moving a flexible film (12) coated with the coating film on the surface on one side, heating a solvent in the coating film of the flexible film (12) from the back side ofthe flexible film (12) by using a heater (19) to gasify the same on the other side, aggregating the gasified solvent by using a cooling plate (20) arranged at the surface side of the flexible film (12) and spaced at the specified distance apart from the flexible film (12), and recycling the aggregated solvent by the trough (21) at the specified temperature, wherein the above steps are performed atthe temperature being below the dew point temperature by 7 DEG C.
Description
Technical field
The present invention relates to the drying means of coated film, the coating face that relates to the rectangular and wide cut that the various fluid compositions of coating on the flexible thin film who advances are formed particularly carries out the drying means of dry coated film.
Background technology
About to the various fluid compositions of coating on the flexible thin film who advances and the coating face of the rectangular and wide cut that forms carries out dry drying means, existence is supported non-coated face side with cylinder, make its dry drying means by air nozzle to the coating surface cross air blasting, or drying to coated face and non-coated face simultaneously by air nozzle, thereby under the state that makes the supporter come-up, be supporter not with state of contact such as cylinder under, make the contactless air flotation drying means of its drying.
Usually, make in these blowings in its dry method (below be called the aeration-drying method),, and make the solvent evaporation that contains in the coated face and dry by wind to the damping of coating top blast.The drying efficiency height of this aeration-drying method, but, owing to directly or by porous plate, cowling panel etc. provide wind to coated face, therefore wind can cause the coated face disorder, make coating layer in uneven thickness, produce inequality, and cause the evaporation rate of solvent in the coated face inhomogeneous failing to be convened for lack of a quorum, produce so-called shaddock face, existence can not obtain the problem of uniform coating layer.
Particularly, contain in coating fluid under the situation of organic solvent, the generation of above-mentioned inequality is very remarkable.Reason is at the dry initial stage, be in the state that contains a large amount of organic solvents in the coated film, when this stage produces the evaporation distribution of organic solvent, the result produces Temperature Distribution at the coating face, surface tension distributes, in the coating face, cause that the high Buddhist nun of so-called horse traction (marangoni) convection current etc. flows.Produce such inequality and cause great coating defects.
Contain in coated film under the situation of liquid crystal, not only produce above-mentioned uneven drying, but also exist because the liquid crystal aligning that the wind that blows out causes being coated with face produces problems such as skew.
Therefore, in patent documentation 1, disclose and do not dried and make the solvent evaporation in the coating fluid and reclaim and make its dry method.In the method,, make solvent condenses by in drying device, the heating of non-coated face being promoted by the evaporation of the solvent of coated face and making its method in the cold plate dewfall that is arranged at the coated face side, and with solvent recovery in chute, thereby drying coating film.
Patent documentation 1 spy opens the 2003-170101 communique
Summary of the invention
But in the coated film drying means of the configuration chute in patent documentation 1, along with the rising of drying capacity, near water droplet dewfall chute and chute produces the problem that is caused the coated film defective by this water droplet.
The present invention is In view of the foregoing proposed, the drying means that the purpose of this invention is to provide a kind of coated film, it is to use and comprises the heater that the solvent that will be coated with the flexible thin film who advances in the coated film of coating fluid heats and gasifies, in being separated by predetermined distance of flexible thin film's coated film side and the coldplate that almost parallel is provided with the flexible thin film, and be used for will be by coldplate cooling the drying device of the chute that reclaims in the solvent of this coldplate of condensation, thereby the coated film drying means of drying coating film, wherein, can prevent that the water droplet dewfall from producing defective in the water droplet of chute or chute surface and this dewfall in coated film.
To achieve these goals, the invention is characterized in, comprise: Yi Bian the flexible thin film who is coated with coated film on the surface is advanced, utilize the solvent of heater from this flexible thin film's the described flexible thin film's of rear side heating and gasifying coated film on one side, utilization be disposed at described flexible thin film face side with the be separated by coldplate of position of predetermined distance of this flexible thin film, make the solvent aggegation of gasification, and reclaim the operation of the solvent of described aggegation with the chute that maintains set point of temperature, in the atmosphere of dew-point temperature below 7 ℃, carry out above-mentioned operation.
According to the present invention, by comprising on one side the flexible thin film who is coated with coated film on the surface is advanced, utilize the solvent of heater from this flexible thin film's the described flexible thin film's of rear side heating and gasifying coated film on one side, utilization be disposed at described flexible thin film face side with the be separated by coldplate of position of predetermined distance of this flexible thin film, make the solvent aggegation of gasification, and reclaim the operation of the solvent of described aggegation with the chute that maintains set point of temperature, and in the atmosphere of dew-point temperature below 7 ℃, carry out above-mentioned operation, can be suppressed at and produce dewfall near chute or the chute, thereby can suppress water droplet to be attached to flexible thin film's coated film and produce the coated film defective.
Further, the invention is characterized in, described flexible thin film is vertically advanced with respect to ground.Under the situation that the flexible thin film is vertically advanced with respect to ground,, preferably be provided for preventing the solvent of condensation and the water-drop sputtering chute lid on the described coated film in the part of facing with described flexible thin film of chute.In addition, preferably chute and chute lid are maintained the set point of temperature higher than coldplate temperature.By chute and chute lid are maintained the set point of temperature higher than coldplate temperature,, can further suppress owing to causing the coated film defective at chute and chute lid generation dewfall because water droplet is difficult to dewfall and covers in chute.
In addition, under the situation that the chute lid is set, the gap of preferred chute lid and coldplate is more than the 2.5mm, below the 4.0mm.Gap by making chute lid and coldplate is more than 2.5mm, even in the water droplet dewfall under the situation of coldplate, owing to the water droplet of adhering to is arranged at the chute drowning, thus the chute lid can be suppressed by the water droplet cooling, or prevent to adhere to water droplet in a side of facing with the flexible thin film of chute lid.In addition, by making the gap below 4.0mm, can keep the bottom line distance of cooling effect of the vaporized solvent kept of coldplate.
Further preferably partly be implemented hydrophilicity-imparting treatment with the coldplate that described chute lid is faced mutually.In addition, further preferably partly be provided with mesh with coldplate that described chute lid is faced mutually.Partly implement hydrophilicity-imparting treatment or mesh is set thereon by the coldplate that coldplate and chute lid are faced mutually, can prevent that the water droplet of dewfall is attached to the chute lid.
According to the present invention, a kind of drying means of coated film is provided, it can prevent that water droplet from causing coated film to produce defective at chute or chute surface sweating and by the water droplet of this dewfall.
Description of drawings
Fig. 1 is the figure that the example of the coating drying production line that is assembled with the drying device of using coated film drying means of the present invention is shown.
Fig. 2 is the figure that the manufacturing line of optical compensating gage is shown.
Fig. 3 is near the enlarged drawing of chute of using the drying device of coated film drying means of the present invention.
Fig. 4 is the figure that another embodiment of the drying device of using coated film drying means of the present invention is shown.
Among the figure: 10-is coated with drying production line, 12-flexible thin film, 14-conveying device (conveying operation), the 15-guiding roller, 16-coating mechanism (painting process), 17-solvent and/or water droplet, 18-drying device (drying process), 19-heater, 20-coldplate, the 20a-bend, 21-chute, 21a-chute lid, 22-is incubated water, the 23-fixed part, 24-coiler device (coiling operation), L-gap
The specific embodiment
Below, preferred implementation of the present invention is described with reference to the accompanying drawings.The present invention is described by following preferred implementation, but can change by the whole bag of tricks without departing from the scope of the invention, and can utilize other embodiments beyond the present embodiment.Therefore, within the scope of the present invention change and be included in the scope of claims.In addition, in this manual, adopt the number range of "～" expression to mean the scope that comprises the numerical value of putting down in writing before and after "～".
Fig. 1 is the concept map that the example of the coating drying production line 10 that is assembled with the drying device of using coated film drying means of the present invention is shown.
As shown in the figure, coating drying production line 10 mainly comprises: the output device (omitting among the figure) that will export with the flexible thin film 12 that the cylinder shape is reeled, coating mechanism 16 to flexible thin film's 12 coating coating fluids, will be at the solvent condenses in the coating fluid of the coated film that flexible thin film's 12 coatings form, the drying device 18 of recovery, the coiler device (omitting among the figure) that to reel by the dry product of making of coating, and a plurality of guiding rollers 15,15 that form the transfer path that flexible thin film 12 advances.In addition, as required,, the aeration-drying device (not shown) that makes the coated film drying is set in the downstream of drying device 18.
As flexible thin film 12, use polyethylene, PET (PETG), TAC resin moldings such as (triacetates), paper, metal forming etc.
As shown in Figure 2, cleaner 70 can be set at the leading portion of coating mechanism 16, or implement preliminary treatment etc. on flexible thin film 12 surface.In high-quality optical film that requires almost not have impurity etc. etc.,, can obtain high-quality coating, desciccator diaphragm by adopting these operations simultaneously.
And Fig. 2 is the ideograph of brief configuration of the manufacturing installation of the expression optical compensating gage that is assembled with the drying device 18 of using coated film drying means of the present invention.
The manufacturing line of optical compensating gage is for example undertaken by following operation.
1) output flexible thin film's 12 operation 14;
2) contain alignment films formation in the coating of flexible thin film's surface and form the formation operation 52 of using resin bed with the coating fluid of resin and dry alignment films;
3) be formed with alignment films on the surface and form, implement friction treatment, on the flexible thin film, form the friction process 54 of alignment films at resin layer surface with on the flexible thin film of resin bed;
4) coating contains the painting process 16 of liquid crystal liquid crystal property discotic compound of the coating fluid of liquid crystal liquid crystal property discotic compound on alignment films;
5), make the drying process 18 of the solvent evaporation in this coated film with this coated film drying;
6) this coated film is heated to plate-like nematic phase formation temperature, the liquid crystal layer that forms the nematic liquid crystal layer of plate-like forms operation 58;
7) with the operation 60 of this curable liquid crystal layer (that is, quench after liquid crystal layer forms and solidify, perhaps when use has the liquid crystal liquid crystal property discotic compound of bridging property functional group, penetrate (perhaps heating) liquid crystal layer by illumination and make that it is crosslinked);
8) will be formed with the coiling operation 24 that the flexible thin film of this alignment films and liquid crystal layer reels.
In addition, 50 illustrate dry section, and 64 illustrate testing fixture, and 66 illustrate diaphragm, and 68 illustrate laminating machine.
As shown in Figure 1, drying device 18 comprises and will be coated with the solvent heating in the coated film of coating fluid and the heater 19 of gasification on the flexible thin film 12 who advances, in being separated by predetermined distance of flexible thin film's coated film side and the coldplate 20 that almost parallel ground is provided with the flexible thin film, and be used for will be by coldplate 20 coolings condensation in the chute 21 of the solvent recovery of coldplate.Thus, constitute when the solvent evaporates in the coating fluid of coated film, the solvent condenses of volatilization reclaims in coldplate 20 and by chute 21.
And, the solvent of coating fluid is corresponding to toluene, dimethylbenzene, styrene etc. are aromatic hydrocarbon based, chlorobenzene, chlorinations such as 0-dichlorobenzene are aromatic hydrocarbon based, comprise methane Derivatives such as monochloro methane, ethane derivatives such as monochlorethane etc. are in interior chlorinated aliphatic hydrocarbon class, methyl alcohol, isopropyl alcohol, alcohols such as isobutanol, methyl acetate, ester classes such as ethyl acetate, ether, 1, ethers such as 4-diox, acetone, ketones such as MEK, glycol ethers such as glycol monomethyl ether, alicyclic hydrocarbon types such as cyclohexane, aliphatic hydrocarbons such as n-hexane, the mixture of aliphatic or aromatic hydrocarbon etc.
The material that is used for the surface that makes solvent condenses of coldplate 20 is metal, plastics, timber etc., be not limited to this particularly, contain in coating fluid under the situation of organic solvent, some materials that this organic solvent is had patience are used in expectation, perhaps implement coating on the surface.
In drying device 18, the device that is recovered in the solvent of coldplate 20 condensations for example is provided with groove at the cryosurface of coldplate 20, utilizes capillary force to reclaim solvent.The direction of groove can be flexible thin film 12 a direct of travel, also can be perpendicular direction.
For the uneven drying of the coated film that prevents to cause by the free convection that produces after the coating coating fluid, preferably with drying device 18 from coating mechanism 16 near-earth configuration as far as possible.Particularly, preferably the inlet of drying device 18 is set in place in from coating mechanism 16 for 5m with interior position, more preferably the inlet of drying device 18 is set in place in from coating mechanism 16 for 2m with interior position, most preferably the inlet of drying device 18 is set in place in from coating mechanism 16 for 0.7m with interior position.
Based on same reason, flexible thin film 12 gait of march preferably flexible thin film 12 is being coated with the speed of back 30 seconds with interior arrival drying device 18 by coating mechanism 16, more preferably flexible thin film 12 is being coated with the speed of back 20 seconds with interior arrival drying device 18 by coating mechanism 16.
The coating weight of coating fluid and coated film thickness big more easy more cause in coated film inside mobile, thereby the inequality of being easy to generate, if but the thickness of coated film is 0.001～0.08mm, then can not have inequality and dry efficiently.
When flexible thin film 12 gait of march is too fast,, coated film is produced baneful influence because the wind that accompanies makes near the boundary layer disorder of coated film.Therefore, flexible thin film 12 gait of march is preferably set to 1～100m/ minute, more preferably is set at 5～80m/ minute.
The drying device 18 of using coated film drying means of the present invention is for flexible thin film's 12 heating and make solvent gasification in the coated film, and heater 19 is set with heating at the opposition side of coated film.As heater, can not as shown in Figure 1 tabular, the heated roller that can heat up also can be set with heating.In addition, also can adopt heating such as infrared heater, microwave heating equipment.
And,, coldplate 20 is set with cooling in flexible thin film 12 coated film side for the condensation of the solvent that promotes to gasify in the coating fluid.
Preferably heater 19 and coldplate 20 are carried out temperature treatment.Coldplate 20 can controlled temperature, under the situation of wanting to cool off, and the equipment that need be provided for cooling off.Cooling can be adopted the water-cooled heat exchanger mode of using refrigerant etc., uses the air-cooled type of wind, and the mode that makes electricity consumption, for example uses the amber ear to paste the mode etc. of element.
At this, the temperature of heater 19 preferably maintains 70～130 ℃, and the temperature of coldplate 20 preferably maintains 8～10 ℃.
As shown in Figure 1, below coldplate 20, be provided with the chute 21 of the solvent that is used to reclaim condensation, reclaim solvents through chute 21.As long as chute 21 is set in this wise, just carry out the recovery of condensing solvent easily.That is,, can easily carry out the recovery of condensing solvent by between flexible thin film 12 and coldplate 20, there being the surface of chute 21.
The position that chute 21 is set is located at the downside of coldplate 20.Like this, be arranged on can be by the position of reclaiming under the solvent streams for preferred chute 21.In addition, as shown in the figure, the drying device 18 of using coated film drying means of the present invention vertically is provided with, and makes flexible thin film 12 vertically advance with respect to ground, thereby effect of the present invention is increased.
But in the drying device that constitutes like this, along with the rising of drying capacity, near water droplet dewfall chute or chute produces the problem that is caused the coated film defective by this water droplet.
Therefore, the present invention includes on one side advances the flexible thin film who is coated with coated film on the surface, utilize the solvent of heater from this flexible thin film's the described flexible thin film's of rear side heating and gasifying coated film on one side, utilization be disposed at described flexible thin film face side with the be separated by coldplate of position of predetermined distance of this flexible thin film, make the solvent aggegation of gasification, and reclaim the operation of the solvent of described aggegation with the chute that maintains set point of temperature, and in the atmosphere of dew-point temperature below 7 ℃, carry out above-mentioned operation.
According to the present invention, by in the atmosphere of dew-point temperature below 7 ℃, carrying out above-mentioned operation, can be suppressed near the dewfall that produces of chute or chute, cause the coated film defective attached to flexible thin film's coated film thereby can suppress water droplet.
At this,, consider for example to be provided with the indoor temperature of coating mechanism 16 and drying device 18 by air-conditioning control about making dew-point temperature in the above-mentioned operation below 7 ℃.
Fig. 3 is near the enlarged drawing the chute 21 of drying device 18.In chute 21, make 22 circulations of insulation water, make the surface of chute can keep set point of temperature.In addition, chute 21 is fixed in coldplate 20 by fixed part 23.Though need like this chute 21 to be fixed in coldplate 20 etc., for chute 21 being maintained set point of temperature, the preferred fixed part that is formed by heat-insulating material that adopts perhaps inserts heat-insulating material between fixed part 23 and chute 21.In addition, depending on the solvent types that comprises in the coating fluid (coated film) and the temperature of heater and coldplate in this set point of temperature, is 20～50 ℃.Also have, the set point of temperature of chute strictly is meant the surface temperature of chute 21 parts between flexible thin film 12 and the coldplate 20.In addition, as described below, chute 21 is provided with under the situation of chute lid 21a, refers to the surface temperature of this chute lid.
In addition, be provided with under the situation of drying device as Fig. 1 or mode of advancing in an approximate vertical direction with respect to ground shown in Figure 2 with flexible thin film 12, as shown in Figure 3, preferably in the part of facing with the flexible thin film of chute, be provided for preventing that condensation is splashed to the chute lid 21a on flexible thin film 12 the coated film in the solvent 17 of coldplate 20.
Then, in the part of facing with the flexible thin film of chute, be provided with under the situation that is used to prevent the chute lid 21a on condensation is in the solvent of coldplate 20 or water-drop sputtering to coated film, as shown in Figure 3, preferred chute lid 21a and chute 21 are one.Because by the chute lid is integrated with chute, can not only also maintain set point of temperature with chute but also with the chute lid, cover in chute so can prevent solvent or water droplet dewfall, and then prevent that the solvent of dewfall or water droplet one-tenth are attached to coated film and produce the coated film defective with dripping.
In addition, under the situation that chute lid 21a is set, the gap L (with reference to figure 3) of chute lid 21a and coldplate 20 is preferably more than the 2.5mm, below the 4.0mm.
In addition, gap by making chute lid and coldplate more than 2.5mm, even in the water droplet dewfall under the situation of coldplate, do not adhere to water droplet owing to covering at chute, so can suppress chute lid by the water droplet cooling, perhaps prevent to adhere to water droplet in a side of facing with the flexible thin film of chute lid.In addition, by making the gap below 4.0mm, can keep the bottom line distance of the cooling effect that can keep vaporized solvent of coldplate.
Also have, preferred coldplate 20 partly is implemented hydrophilicity-imparting treatment with the coldplate that chute lid 21a faces mutually.By coldplate 20 is partly carried out hydrophilicity-imparting treatment with the coldplate that chute lid 21a faces mutually, can prevent that the water droplet of dewfall is attached to the chute lid.
Consider the rate of drying of the coated film of expectation, the distance (at interval) on the surface of the chute 21 of the surface of coated film and drying device 18 need be adjusted into suitable distance.Distance rate of drying in short-term rises, on the other hand, and the influence of the range accuracy of being set easily.On the other hand, when distance was big, not only rate of drying significantly reduced, and causes free convection by heat, thereby causes uneven drying.The distance on the surface of the chute 21 of the surface of coated film and drying device 18 is 1～200mm preferably, is more preferably 1.5～100mm.
Also have, as the aeration-drying device that uses as required, can use and use as prior art, support non-coated face side by cylinder, make its dry cylinder transmit drying mode to the coated face cross air blasting by air nozzle, dry to coated face and non-coated face simultaneously by air nozzle, under the state that makes the supporter come-up, be supporter not with state of contact such as cylinder under, make the contactless air flotation drying mode of its drying, a kind of by in the contactless drying mode, utilize the drying device of space and dry efficiently string volume type drying mode etc. efficiently.In the aeration-drying device of any mode, make providing dry air to the coating face coated film drying aspect be identical.
In addition, the conveying device of using in the coating drying production line 10 that is assembled with the drying device of using coated film drying means of the present invention, guiding roller 15, coiler device etc. use habitual parts, omit their explanation at this.
According to the drying means of the coated film of the present invention of above detailed description, can be suppressed near (chute lid) generation dewfall chute or the chute, thereby can suppress water droplet to be attached to flexible thin film's coated film and produce the coated film defective.
In addition, coated film drying means of the present invention is even being used for the coating fluid dissolving or being dispersed with under the situation of solid state components such as macromolecule or particle, also can obtain identical effect.And, in containing the system of particle etc., produce uneven drying and also the particle in the coated film is disperseed to distribute and produce considerable influence.Therefore, preferably in this system, use native system.
And the shape of the coldplate 20 of drying device 18 need not for example as shown in Figure 4, also can be the shape that is provided with bend 20a at coldplate 20 in the shape shown in Fig. 1 and Fig. 3.Like this, by being provided with bend 20a at coldplate 20, dewfall in the solvent of coldplate 20 or water droplet by the chute 21 that leads best.In this case, preferably not only coldplate 20 is covered the coldplate part that 21a faces mutually with chute, and bend 20a is implemented hydrophilicity-imparting treatment similarly.In addition, in this case, preferably also be provided with mesh, make its suction at bend 20a.
(embodiment)
The manufacturing installation of optical compensating gage of being used the drying device 18 of coated film drying means of the present invention by being assembled with of Fig. 2 experimentizes.
The manufacture method of optical compensating gage is always to carry out continuously up to the operation of the optical compensating gage of the acquisition of reeling from output strip flexible thin film's operation.(FUJITAC, Fuji Photo Film Co., Ltd. make at triacetyl cellulose, thickness: 100 μ m, width: strip flexible thin film's 500mm) a side, be coated with long chain alkyl modified Poval (poval) (MP-203, KURARAY company makes, poval is a registration mark) 5 weight % solution, drying is 4 minutes under 90 ℃, thereby forms the alignment films formation resin bed of thickness 2.0 μ m.The transfer rate of film is 50m/ minute.
In above-mentioned tri acetyl cellulose membrane, the refractive index of the both direction of the quadrature in the film surface is nx, ny, and the refractive index of thickness direction is nz, and film thickness is when being d, (nx-ny) * and d=16nm, (nx-ny)/2-nz} * d=75nm.In addition, when resin bed is used in the above-mentioned alignment films formation of formation, adopt the coating drying production line of the drying device 18 that comprises Fig. 3 to carry out.
Next, with 50m/ minute speed continuously transmit and have gained alignment films form film with resin bed on one side, implement friction treatment and formed alignment films at resin layer surface on one side.Friction treatment is carried out with the friction roll revolution of 300rpm, next the alignment films that obtains is carried out dedusting.
Next, on one side transmit film continuously with 50m/ minute speed with gained alignment films, on one side on alignment films by coating speed, the 6.5cc/m of channel mould coating machine with 50m/ minute
2The coating fluid used of coating weight coating fluid crystal layer and form liquid crystal layer (coated film), next, make it pass through drying device 18 and hot-air drying device.Hot-air drying device is adjusted into 130 ℃.After being coated with for 3 seconds, enter in the drying device 18, enter hot-air drying device after 3 seconds.In hot-air drying device, passed through about 3 minutes.
The coating fluid that the liquid crystal layer that uses is used is that the weight ratio by discotic compound TE-(1) that will illustrate below and TE-(2) is that the mixture of 4: 1 mixture and the Photoepolymerizationinitiater initiater that is added with 1 quality % (trade name: IRGACURE907, Japanese Ciba-Geigy company makes) is dissolved in the MEK of 40 weight % and prepares.
[changing 1]
In addition, the moistening thickness t of liquid crystal layer is 6.5 μ m, and compound plate (ウ エ Block) 12 is 65 μ m with the interval D of channel mould coating machine 18 front ends.And the value of t/D is 0.1.
Then, on one side transmit the film that has been coated with this alignment films and liquid crystal layer continuously with 50m/ minute speed, on one side by ultraviolet lamp to liquid crystal layer surface irradiation ultraviolet ray.That is, the film by the above-mentioned thermal treatment zone is made liquid crystal layer crosslinked by the ultraviolet ray of the illumination 600mW in 4 seconds of ultraviolet lamp (ultraviolet lamp: power output 160W/cm, length of illumination 1.6m) irradiation.
At this, in the drying device 18 of the application of Fig. 3 coated film drying means of the present invention, the gap L of the chute that is arranged at chute 21 being covered 21a and coldplate 20 experimentizes.The temperature of heater 19 is 120 ℃, and the temperature of coldplate 20 is 10 ℃.In embodiment 1～9 and comparative example 1～3, the drying of coated film is to carry out in the atmosphere of the dew-point temperature shown in the following table 1.
At this, under the condition of the 1.0mm shown in the table 1～10.0mm scope, make drying device 18 work in the gap L that makes chute lid and coldplate.In embodiment 1～6,9 and comparative example 1～3, the coldplate that coldplate and chute lid are faced has mutually partly been implemented hydrophilicity-imparting treatment.In addition, in embodiment 8, the coldplate of facing mutually at coldplate and chute lid partly is provided with mesh.
In embodiment 1～9 and comparative example 1～3, the pollution to product (coated film) surface that water droplet is caused to the adhesion condition of coldplate and chute lid, by water droplet, the surface state uneven drying of product (coated film) are tested.
Evaluation about the water droplet in table 1 adheres to is evaluated as ◎: do not have zero fully: adhere to or delay, △ are arranged a little: adhere to and be detained, *: be detained and grow to and contact with product.That pollutes is evaluated as ◎: do not pollute, normal, zero: though pollution is arranged in the product outside of compound plate end, but improve by fine tuning to device, △: by avoiding to the fine tuning of device, but can not produce damage to the product outside, *: owing to accumulating of water droplet polluted product.The surface state uneven drying be evaluated as ◎: no problem, zero: the part drying is slow slightly, but quality is no problem, △: produce the part uneven drying, but to not influence of quality, *: because the part drying produces slowly to the influential uneven drying of quality.
Also have, carry out overall merit according to these evaluations.The overall merit that three above ◎ will be arranged is ◎, and two following ◎ will be arranged and do not have the overall merit of △ is zero, and two following ◎ will be arranged and the overall merit of △ is arranged is △, if having one * then overall merit for *.
[table 1]
According to above result as can be known, when carrying out coated film dry in the atmosphere of dew-point temperature below 7 ℃, overall merit is more than the △.In addition, according to embodiment 1～7 more as can be known, the gap L of preferred chute lid and coldplate is more than the 2.5mm, below the 4.0mm.In addition, according to embodiment 3 and embodiment 7 more as can be known, preferred coldplate partly is implemented hydrophilicity-imparting treatment with the coldplate that the chute lid is faced mutually.And then, according to embodiment 7 and embodiment 8 more as can be known, preferably the coldplate of facing mutually at coldplate and chute lid partly is provided with mesh.
Claims (7)
1, a kind of drying means of coated film is characterized in that, comprising:
The flexible thin film who is coated with coated film on the surface is advanced on one side,
Utilize the solvent of heater from this flexible thin film's the described flexible thin film's of rear side heating and gasifying coated film on one side,
Utilization be disposed at described flexible thin film face side with the be separated by coldplate of position of predetermined distance of this flexible thin film, make the solvent aggegation of gasification,
Reclaim the operation of the solvent of described aggegation with the chute that maintains set point of temperature,
Wherein, in being atmosphere below 7 ℃, dew-point temperature carries out described operation.
2, the drying means of coated film according to claim 1 is characterized in that,
Described flexible thin film is vertically advanced with respect to ground.
3, the drying means of coated film according to claim 2 is characterized in that,
In the part towards described flexible thin film of described chute, be provided with the chute lid.
4, the drying means of coated film according to claim 3 is characterized in that,
With the temperature maintenance of described chute and described chute lid is the set point of temperature higher than the temperature of described coldplate.
5, the drying means of coated film according to claim 4 is characterized in that,
The gap of described chute lid and described coldplate is more than the 2.5mm, below the 4.0mm.
6, the drying means of coated film according to claim 5 is characterized in that,
The coldplate of facing mutually with described chute lid partly is implemented hydrophilicity-imparting treatment.
7, the drying means of coated film according to claim 5 is characterized in that,
Partly be provided with mesh with coldplate that described chute lid is faced mutually.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008179796A JP4934111B2 (en) | 2008-07-10 | 2008-07-10 | Drying method of coating film |
| JP2008179796 | 2008-07-10 |
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| CN101648179A true CN101648179A (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910173359A Pending CN101648179A (en) | 2008-07-10 | 2009-07-09 | Method for drying coating film |
Country Status (3)
| Country | Link |
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| JP (1) | JP4934111B2 (en) |
| KR (1) | KR20100007761A (en) |
| CN (1) | CN101648179A (en) |
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| JP5189424B2 (en) * | 2008-07-10 | 2013-04-24 | 富士フイルム株式会社 | Drying method of coating film |
| JP2013249999A (en) * | 2012-05-31 | 2013-12-12 | Konica Minolta Inc | Drying device and drying method for coating film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11170722A (en) * | 1997-12-17 | 1999-06-29 | Konica Corp | Manufacture of photosensitive lithographic plate and photosensitive lithographic plate |
| JP4004429B2 (en) * | 2003-03-26 | 2007-11-07 | 富士フイルム株式会社 | Coating film drying method and apparatus |
| JP4601909B2 (en) * | 2003-03-26 | 2010-12-22 | 富士フイルム株式会社 | Coating film drying method and apparatus |
| JP4951301B2 (en) * | 2006-09-25 | 2012-06-13 | 富士フイルム株式会社 | Optical film drying method and apparatus, and optical film manufacturing method |
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| JP4934111B2 (en) | 2012-05-16 |
| JP2010017646A (en) | 2010-01-28 |
| KR20100007761A (en) | 2010-01-22 |
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Application publication date: 20100217 |