WO2008029718A1 - Procédé de revêtement et appareil de revêtement - Google Patents
Procédé de revêtement et appareil de revêtement Download PDFInfo
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- WO2008029718A1 WO2008029718A1 PCT/JP2007/066967 JP2007066967W WO2008029718A1 WO 2008029718 A1 WO2008029718 A1 WO 2008029718A1 JP 2007066967 W JP2007066967 W JP 2007066967W WO 2008029718 A1 WO2008029718 A1 WO 2008029718A1
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- Prior art keywords
- coating
- resin film
- rod
- coating liquid
- coating rod
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Classifications
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
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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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/12—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being fed round the roller
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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
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
- B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- 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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- 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
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
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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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
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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
- B05C9/04—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 to opposite sides of the work
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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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
- B05D2201/00—Polymeric substrate or laminate
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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
- B05D2252/00—Sheets
- B05D2252/02—Sheets of indefinite length
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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
- B05D2252/00—Sheets
- B05D2252/10—Applying the material on both sides
Definitions
- the present invention relates to a coating method and a coating apparatus.
- Resin films such as biaxially stretched polyester films have been widely used as base films for optical members such as touch panels, liquid crystal displays, and plasma displays.
- One optical member that uses resin film is a hard coat film that is attached to the front of the display.
- the hard coat film is formed by laminating a hard coat film having characteristics such as scratch resistance and abrasion resistance on one side of the resin film.
- the hard coat film with these characteristics is composed of acrylic resin, urethane resin, melamine resin, epoxy resin, polyester resin, etc., and the film thickness is preferably! ⁇ ⁇ ⁇ Has been.
- a coating solution obtained by diluting an actinic ray curable resin monomer or oligomer with an organic solvent is used by a die coating method, a rod coating method, a roll coating method, a gravure coating method, or the like.
- a method of applying to the surface of a resin film, evaporating the organic solvent in a drying oven, and then irradiating with an active ray such as ultraviolet rays to cure has a problem in that it requires a coating / drying device having an explosion-proof facility that is not only a heavy burden on the environment, but also increases the manufacturing cost because it uses a large amount of organic solvent.
- Patent Document 1 To solve the problem, as disclosed in Patent Document 1, by applying a coating liquid mainly composed of an acrylic oligomer and a reactive diluent during the resin film manufacturing process, scratch resistance is obtained. Invented a hard coat film exhibiting characteristics such as wear resistance.
- This coating solution can reduce the amount of organic solvent added to the extent that safety can be ensured even if it is applied in conventional resin film manufacturing equipment that does not have explosion-proof equipment. In addition, it does not require a coating process (called off-line coating) that has been performed on a coating line separate from the conventional resin film production line. Rum manufacturing costs can be reduced.
- the viscosity of the coating liquid diluted with the conventional organic solvent is 1 ⁇ ; whereas the viscosity of the coating liquid with the reduced amount of organic solvent is 200mPa's, while it is about lOmPa's.
- a new problem arises in that the coatability is significantly deteriorated.
- in-line coating in which a coating solution is applied during a resin film manufacturing process, is generally performed after the coating solution is applied and then dried using an oven of a device called a tenter.
- the tenter is a device that holds both ends of a resin film with clips and performs lateral stretching or simultaneous biaxial stretching of the resin film. Since the clip intermittently grips the resin film, the resin film vibrates. It is known that the vibration propagates to the coating part and causes coating unevenness called lateral unevenness (for example, Patent Document 2).
- the rod coating method is widely used for in-line coating.
- the rod coating method for example, as disclosed in Patent Document 3, it is pressed against the lower surface of the resin film while being supported externally by a support body having a plurality of pairs of rollers arranged intermittently in the longitudinal direction of the coating rod.
- a method in which an excessive amount of coating liquid supplied in advance to a resin film is scraped off (measured) with a coating rod is scraped off (measured) with a coating rod.
- since the apex of the groove formed on the outer peripheral surface of the coating rod comes into contact with the resin film! / It is possible to suppress the vibration of the resin film and hardly cause horizontal unevenness. .
- the top of the groove is in contact with the resin film
- the top of the groove is in direct contact with the resin film, but in reality, a very thin film of coating liquid is used. Since it may be interposed between the top of the groove and the resin film, this state is also included!
- the rod coating method is suitable for in-line coating because it has a simple apparatus configuration, simple operation and maintenance, and can be applied at a relatively high speed.
- the viscosity range of a coating solution suitable for the rod coating method is usually lOOmPa's or less (for example, Non-Patent Document 1).
- the viscosity of the coating solution is preferably lOOmPa's or less.
- the coating force is picked up by the coating rod when picking up the coating solution from the support, and it forms a streak, forming just before the contact point between the coating rod and the resin film. Since the puddle becomes uneven in the width direction of the resin film, a coating defect called a coating stripe is likely to occur.
- Patent Document 5 As is known, a method is known in which a coating liquid is supplied to the upper surface of a resin film by a die disposed in the vicinity of a coating rod. According to the knowledge of the present inventors, in this method, the liquid pool formed immediately before the contact portion between the coating rod and the resin film spreads due to the action of gravity, so that the coating liquid has a high viscosity. Even if it exists, it tends to be uniform in the width direction of the resin film.
- the pressure generated in the coating liquid is proportional to the viscosity of the coating liquid. Therefore, when the viscosity is high, a high pressure is applied between the coating rod and the resin film.
- the resin film after application is gripped only at both ends by a tenter clip, so the resin film is easily squeezed in the width direction. Therefore, when the viscosity of the coating liquid is high, the coating rod and the resin film are separated at the center of the resin film due to the pressure of the coating liquid, and the coating thickness becomes thicker than desired, or the coating film is applied in the width direction of the resin film. There are problems such as uneven fabric thickness.
- the guide film disposed before and after the coating rod is used to remove the resin film.
- Methods are known in which the upper surface is pressed and the wrapping angle of the resin film around the coating rod is kept constant (for example, Patent Document 6 and Patent Document 7).
- the viscosity of the coating liquid is less than lOOmPa's due to the above-mentioned problems of collecting the coating liquid and the streak problem that occurs when the coating liquid is picked up by the coating rod because it is applied to the lower surface of the resin finale. Is preferred.
- a coating liquid cannot be simultaneously apply
- a coating method suitable for coating a coating liquid having a viscosity of 200 mPa's or more a die coating method, a roll coating method, a gravure coating method, and the like are known. In these coating methods, the coating tool (die, coating roll, gravure roll) and resin film are kept in a non-contact state, and the coating liquid retained in the gap between the coating tool and the resin film is applied.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-041205
- Patent Document 2 JP 2004-174410 A
- Patent Document 3 Japanese Patent Laid-Open No. 2001-276713
- Patent Document 4 Japanese Patent No. 1169863
- Patent Document 5 Japanese Patent No. 2805177
- Patent Document 6 Japanese Unexamined Patent Publication No. 2000-107661
- Patent Document 7 Japanese Unexamined Patent Application Publication No. 2004-113963
- Non-Patent Document 1 Yuji Harasaki, “Coating Method”, Japan, Sakai Shoten, published October 30, 1979, 56p.
- An object of the present invention is to prevent the occurrence of the problems as described above, and to provide characteristics such as scratch resistance and wear resistance on one side of the resin film during the manufacturing process of the resin film. It is to stack a hard coat film, and to make it possible to stack a functional film having characteristics such as slipperiness and easy adhesion on the opposite surface of the hard coat film as necessary. It is another object of the present invention to provide a coating method and a coating apparatus that can be applied by a rod coating method that has a simple apparatus configuration, is easy to operate and maintain, and is less likely to cause horizontal unevenness.
- An object is to provide a coating method and a coating apparatus that are simple and easy to operate and maintain. Means for solving the problem
- the coating liquid is applied to the upper surface of the traveling resin film using the first coating rod, and then the tenter
- a plurality of pairs of the first coating rods disposed on the upper surface side of the resin film are intermittently disposed in the longitudinal direction of the first coating rods.
- a coating method characterized in that the lower surface of the resin film is supported by a roll, and the coating liquid continuously metered to the upper surface of the resin film is smoothed by the first coating rod.
- the first coating A coating method is provided in which the distance between the center of the shaft of the rod and the guide roll is set to Dc + Dg or more and W / 2 or less.
- a coating method characterized in that a coating liquid having a viscosity of 200 to 2000 mPa's is used as the coating liquid supplied to the upper surface of the resin film. .
- the polymer is extruded by an extruder, the polymer is formed into a sheet shape to form the resin film, and the coating liquid is formed using the coating method described above.
- a method for producing a resin film with a coating film, which is applied to a resin film to form a coating film, is provided.
- an excess amount is supplied to the lower surface of the resin film by applying a coating liquid to the lower surface of the resin film and using a second coating rod as the guide roll.
- a coating method characterized by measuring a coating liquid to be measured with the second coating rod.
- the resin film manufacturing process after applying the coating liquid on both surfaces of the traveling resin film using the first and second coating rods, the resin
- the first coating rod disposed on the upper surface side of the film is pressed against the resin film while externally supported by a support having a plurality of pairs of rollers intermittently disposed in the longitudinal direction thereof, and substantially the same as the resin film.
- the second coating rod disposed at the lower surface side of the resin film on the downstream side of the first coating rod and on the upstream side of the tenter is intermittently moved in the longitudinal direction while rotating in the forward direction.
- a first support that is pressed against the resin film while being supported externally by a support having a plurality of pairs of rollers arranged, rotated in the forward direction at substantially the same speed as the resin film, and continuously metered to the upper surface of the resin film.
- a coating method characterized by smoothing the coating liquid with the first coating rod and simultaneously measuring the second coating liquid supplied to the lower surface of the resin film with the second coating rod. Is provided.
- the first coating method characterized in that the distance between the axial centers of one coating rod and the second coating rod is not less than Dc + D2 and not more than W / 2.
- a coating liquid having a viscosity of 200 to 2000 mPa's is used as the first coating liquid supplied to the upper surface of the resin film, and is supplied to the lower surface of the resin film.
- the polymer is extruded by an extruder, the polymer is formed into a sheet shape to form the resin film, and the coating liquid is applied using the coating method described above.
- a method for producing a resin film with a coating film, which is applied to a film to form a coating film, is provided.
- a coating apparatus that is disposed during a resin film manufacturing process and applies a coating liquid onto a top surface of the traveling resin film using a first coating rod.
- the first coating rod disposed on the upper surface side of the resin film and a support that rotatably and externally supports the first coating rod with a plurality of pairs of roller forces, in the longitudinal direction of the first coating rod
- a plurality of support means intermittently disposed on the support, a pressing means for pressing the first coating rod supported by the support means against the resin film, and a first coating rod
- a coating apparatus comprising a guide roll arranged on the downstream side and on the lower surface side of the resin film, and a coating liquid supply means for continuously supplying a coating liquid to the upper surface of the resin film.
- the first coating A coating apparatus is provided in which the distance between the center of the shaft of the rod and the guide roll is set to Dc + Dg or more and W / 2 or less.
- a coating apparatus for applying a coating liquid to the lower surface of the resin film, wherein the guide roll is a second coating rod, and the lower surface of the resin film.
- a coating apparatus characterized by having a coating liquid supply means for continuously supplying a coating liquid.
- the coating liquid is applied to both surfaces of the resin film that is disposed and travels during the resin film manufacturing process using the first and second coating rods.
- a coating apparatus comprising: a first coating rod disposed on an upper surface side of the resin film; and a support body that includes a plurality of pairs of rollers and that externally supports the first coating rod in a rotatable manner.
- a plurality of support means intermittently arranged in the longitudinal direction of the working rod, a pressing means for pressing the first coating rod supported by the supporting means against the resin film, the downstream side of the first coating rod and the The second coating rod arranged on the lower surface side of the resin film, and a support body that consists of a plurality of pairs of rollers and externally supports the second coating rod so as to rotate freely are intermittent in the longitudinal direction of the second coating rod.
- a plurality of second support means First coating liquid supply means for continuously supplying the first coating liquid to the upper surface of the resin film, and second coating liquid supply means for continuously supplying the second coating liquid to the lower surface of the resin film.
- the first coating apparatus when the width of the resin film is W, the diameter of the first coating rod is Dc, and the diameter of the second coating rod is D2, the first There is provided a coating apparatus characterized in that the distance between the axial centers of one coating rod and the second coating rod is not less than Dc + D2 and not more than W / 2.
- the resin film in the present invention is a resin film capable of melt film formation or solution film formation. Ilm is preferably used. Specific examples thereof include films made of polyester, polyolefin, polyamide, polyphenylene sulfide, acetate, polycarbonate, acrylic resin, and the like. Of these, films made of thermoplastic resins with excellent transparency, mechanical strength, and dimensional stability are particularly preferred. In order to be used as a base film for an optical member of an image display device, it is preferable that the light transmittance is high and the haze value is low. Therefore, a film comprising at least one selected from polyester, acetate and acrylic resin Is preferred. In view of transparency, haze value and mechanical properties, a polyester film is particularly preferably used.
- the resin film in the present invention may be a single-layer film or a composite film having a laminated structure of two or more layers.
- the resin constituting the inner layer portion and the surface layer portion may be a chemically different resin or the same type of resin.
- “rotate at substantially the same speed as the resin film” means that the difference in speed between the peripheral speed of the first coating rod and the traveling speed of the film is rotated by ⁇ 10% or less. Further, it is preferable that the rotation speed is smaller than ⁇ 5% when the speed difference is smaller. It is more preferable to rotate the speed difference within ⁇ 1%.
- the first coating rod may be actively driven to synchronize with the film traveling speed, or the first coating rod may be driven and rotated by the film in order to simplify the device configuration and simplify the operation. You may rotate at substantially the same speed. The same applies to the second coating rod.
- “smoothing with the first coating rod” means to flatten the coating liquid supplied by weighing in advance with the first coating rod. “Weighing with a rod” means that the excess coating liquid supplied is scraped off with the second coating rod.
- the excessive amount is supplied to the lower surface of the resin film means the amount of the second coating liquid applied on the resin film after being measured by the second coating rod. In contrast, it means a large supply.
- the viscosity of the coating liquid is measured according to the standard of JI S Z8803 using a rheometer (RC20 manufactured by Rheotech).
- a rheometer RC20 manufactured by Rheotech.
- the temperature and shear rate of the coating liquid should be the same as the temperature and shear rate of the actual coating liquid. It is difficult to accurately know a certain force S, the temperature of the coating liquid in the coating area, and the shear rate. Therefore, as for the temperature of the coating liquid, the temperature at the center of the liquid pool is measured with a radiation thermometer, and a temperature close to the temperature of the coating section may be used.
- the shear rate in the present invention, the coating rod rotates at the same speed and forward as the resin film, so the shear rate is very small. Therefore, it is acceptable to use a shear rate of 10 / s as a representative value;
- the coating method and the coating apparatus it is possible to apply a coating liquid having a higher viscosity to the upper surface of the traveling resin film by a rod coating method with a simple apparatus configuration and easy operation and maintenance. . Since in-line coating can be applied with a high-viscosity coating without causing unevenness in the horizontal line, replace the coating solution that had been diluted with an organic solvent to reduce the viscosity with a coating solution that has not been diluted with an organic solvent. It is possible to reduce the burden on the environment. In addition, since an organic solvent is used, part of the coating process that has been performed with offline coating with explosion-proof equipment can now be performed with in-line coating, which can reduce manufacturing costs.
- a low-viscosity coating liquid of the same level as that of the conventional coating is applied to the lower surface of the traveling resin film while applying a higher-viscosity coating liquid to the lower surface. It becomes possible to apply simultaneously.
- FIG. 1 is a side view of a coating apparatus according to a first embodiment of the present invention.
- FIG. 2 is a side view of a coating apparatus according to a second embodiment of the present invention.
- FIG. 3 is a front view of a coating rod and support means arranged on the upper surface side of the resin film in the first embodiment of the present invention.
- FIG. 4 is a front view of a coating rod and support means arranged on the lower surface side of a resin film in a second embodiment of the present invention.
- FIG. 5 is a conceptual diagram showing how to obtain a winding angle.
- FIG. 6 is a side view of a coating apparatus in which the support body of the coating rod is configured with a V-shaped groove.
- FIG. 7 is a schematic view showing an embodiment of a resin film production process by sequential biaxial stretching.
- FIG. 8 is a schematic diagram showing an apparatus configuration when a coating liquid is applied to a resin film during the process of FIG.
- the production process of the resin film in the present invention is preferably a production process in which the film is formed into a sheet by melt film formation or solution film formation and then biaxially stretched.
- the biaxial stretching method is preferably sequential biaxial stretching or simultaneous biaxial stretching, and a tenter is used for the transverse stretching step in sequential biaxial stretching and the longitudinal and transverse stretching step in simultaneous biaxial stretching.
- the position where the coating method and the coating apparatus of the present invention are used is between the longitudinal stretching process and the transverse stretching process in the case of sequential biaxial stretching, and between the casting process and the longitudinal and transverse stretching process in the case of simultaneous biaxial stretching. It is preferable that the coating liquid immediately before the tenter is dried and / or cured in the oven of the tenter.
- FIG. 7 shows an embodiment of a resin film manufacturing process by the sequential biaxial stretching method
- FIG. 8 shows an apparatus configuration when a coating solution is applied to the resin film in the process of FIG.
- the production process of the resin film by the sequential biaxial stretching method comprises an extruder 91, a base 92, a cast drum 93, a longitudinal stretching machine 94, a lateral stretching machine 95, and a winding roll 96.
- the biaxially stretched film is stretched in the width direction by a transverse stretching machine 95 to form a biaxially stretched film, and the biaxially stretched film is continuously wound by a winding roll 96.
- a coating device 97 is installed between the longitudinal stretching machine 94 and the lateral stretching machine 95, and the coating is applied to the uniaxially stretched resin film.
- the present coating apparatus may be installed before the simultaneous biaxial stretching machine.
- the traveling speed of the resin film in the present invention is too fast, streaks are likely to occur, and if it is too slow, the traveling speed tends to fluctuate. 5 to 100 m / minute force S, preferably 10 to 60 m / minute.
- the thickness of the resin film used in the present invention is not particularly limited, but when used as a base film of an optical member, the thickness after biaxial stretching is 10 to 500 ⁇ m from the viewpoint of mechanical strength and handling properties.
- m force ⁇ preferably, more preferably 20 to 300 ⁇ m.
- the tension per unit width applied in the running direction of the resin film in the present invention is preferably 3000 N / m or more and lOOOON / m or less.
- the tension applied between the longitudinal stretching machine and the transverse stretching machine is designed to be lOOOON / m or less, so that it does not exceed the design upper limit. To do. Further, when less than 3000N / m tension is this the force s travel of the resin film becomes unstable.
- FIG. 1 is a side view of a coating apparatus according to a first embodiment of the present invention.
- FIG. 3 is a front view of the coating rod and supporting means arranged on the upper surface side of the resin film of the first embodiment of the present invention.
- the coating rod 11 as the first coating rod is formed by, for example, winding a wire around the outer peripheral surface of a smooth round bar V and rolling the outer peripheral surface of a smooth round bar.
- a rolling rod having grooves formed in can be used.
- the material of the coating rod 11 is preferably stainless steel, particularly SUS304 or SUS316 force S.
- the surface of the coating rod 11 may be subjected to a surface treatment such as hard chrome plating.
- the diameter of the coating rod 11 is preferably 5 to 40 mm, more preferably 10 to 30 mm.
- the coating rod 11 is rotated approximately at the same speed and in the forward direction as the resin film 1 in order to prevent the resin film 1 from being damaged.
- the coating amount of the coating liquid 14, 2 in the wet state immediately after coating 100 g / m 2 is preferred instrument 4 to 50 g / m 2 is more preferable.
- the coating amount can be adjusted by the size of the groove formed in the coating rod 11 as in the conventional rod coating method.
- the coating rod 11 is a wire mouth, the wire diameter of the wire to be wound is changed, and when the coating rod 11 is a rolling rod, the groove size is changed with a die having a different groove depth and / or groove pitch. It can be changed by rolling.
- the coating liquid supply means 33 for continuously metering and supplying the coating liquid 14 to the upper surface of the resin film 1 is composed of a tank 15, a pump 16, a filter 17 and a discharge nozzle 18.
- the temperature of coating solution 14 It may be equipped with a degree adjusting means and a defoaming means!
- the coating liquid 14 measured and supplied to the upper surface of the resin film 1 by the pump 16 forms a liquid pool upstream of the contact portion between the coating rod 11 and the resin film 1 and is smoothed by the coating rod 11.
- the coating width of the coating liquid 14 is adjusted by the discharge amount of the pump 16.
- the pump 16 is required to be quantitative and low pulsation, so a diaphragm pump or a mono pump is preferred!
- the support body 13 of the coating rod 11 is composed of a plurality of pairs of rollers 12, and a plurality of the support bodies 13 are intermittently arranged in the longitudinal direction of the coating rod 11.
- the pressure of the coating solution acting between coating rod 1 1 and resin film 1 increases, so coating rod 11 and resin film It is necessary to press the coating rod 11 firmly against the resin film 1 so that the 1 is not separated.
- a structure in which a coating rod is fitted in a V-shaped groove or a semicircular groove extending in the axial direction of the coating rod is known.
- the friction resistance between the coating rod 11 and the support 13 can be reduced by rotatably supporting the coating rod 11 in the circumferential direction by the support 13 composed of a plurality of pairs of rollers 12. Even if the pressing force is large, rotation failure of the coating rod 11 does not occur.
- a general-purpose bearing can be used with a diameter of the roller 12 of 8 mm or more, it is preferable that the diameter of the roller 12 is 2 times or less of the preferred diameter of the coating rod 11 because an arrangement space can be secured. It is preferable that the width of the roller 12 is 3 mm or more because it is possible to use a general-purpose bearing, and it is preferable that the width of the roller 12 is not more than twice the diameter of the coating rod 11. This is preferable because the hit can be reduced. In order to reduce wear of the coating rod 11, it is preferable to use a material having a lower hardness than the coating rod 11 for the surface layer of the roller 12. It is preferable to use a synthetic rubber or an elastomer.
- the elastomer means a rubber-like elastic resin that can be melt-molded by an injection molding method, an extrusion molding method, a casting molding method, a blow molding method, an inflation molding method, or the like.
- the elastomer urethane elastomer, polyester elastomer, polyamide elastomer and the like are preferable, and it is particularly preferable to use a thermoplastic polyurethane elastomer excellent in wear resistance and mechanical strength.
- the thickness of the elastomer formed on the surface layer of the roller 12 is preferably 0.5 to 6 mm. Elastomer hardness is 60 ⁇ 98AQIS K6253 standard! /, Measurement) is preferred! /.
- the support means 31 for the coating rod 11 includes a plurality of support bodies 13 including a pair of rollers 12, and at least one end of the coating rod 11 in the circumferential direction of the coating rod 11. And a holder 32 that is rotatable and restrains axial and vertical movements.
- the arrangement interval L1 of the support 13 is preferably arranged so that the amount of stagnation of the coating rod 11 when the coating liquid 14 having a high viscosity is smoothed is 1 O ⁇ m or less. The amount of stagnation is calculated from the tension in the running direction of the resin film 1 and the wrapping angle of the resin film 1 with respect to the coating rod 11. The reaction force in the out-of-plane direction of the resin film 1 is equally distributed on the coating rod 11.
- the arrangement interval L1 of the support 13 is 7 to 15 times the diameter of the coating rod 11.
- the pressing means (not shown) of the coating rod 11 is configured so that the support means 31 can be moved up and down and fixed at an arbitrary position.
- the support means 31 is installed so as to be movable only in the vertical direction using a linear guide or the like, and the support means 31 is pressed against the stopper and fixed using an air cylinder or an oil cylinder.
- the support means 31 may be moved and fixed to an arbitrary position using a ball screw or the like.
- a guide roll 19 that supports the entire width of the resin film 1 from the lower surface side is provided.
- the resin film 1 on the downstream side of the coating rod 11 is in a state where only the both ends are gripped by the tenter 4, so the tension applied in the running direction of the resin film 1 is the resin film.
- the center part is smaller than the end part of 1.
- the guide roll 19 is provided on the downstream side of the coating rod 11 and the upstream side of the tenter 4, so that the stagnation of the resin film 1 is suppressed and the high-viscosity coating liquid 14 can be applied.
- the guide roll 19 is preferably a general metal roll and preferably has a diameter of 100 to 200 mm.
- the distance La between the axial centers of the coating rod 11 and the guide roll 19 is such that the width of the resin film 1 is W, the diameter of the coating rod 11 is Dc, and the diameter of the guide roll 19 is Dg.
- the distance La between the shaft centers is smaller than Dc + Dg, there is a possibility that the coating rod 11 and the guide roll 19 interfere with each other.
- the axial center distance La is larger than W / 2, the effect of suppressing the sag in the width direction of the resin film 1 by the guide roll 19 becomes small.
- the viscosity of the coating liquid 14 supplied to the upper surface of the resin film 1 is preferably 200 to 2000 mPa's.
- the viscosity of the coating liquid 14 is smaller than 200 mPa's, the fluctuation of the liquid pool formed on the upstream side of the contact portion between the coating rod 11 and the resin film 1 is increased, resulting in uneven coating thickness and variation in coating width. And may contaminate the clip.
- coating stripes called rib stripes may occur. Ribbed lines usually occur on the entire coated surface with a small pitch of 2 mm or less.
- the viscosity of the coating liquid is high and easily occurs, but even if the occurrence of crease or rib streaks is observed immediately after application, leveling is not performed until the coating liquid dries or hardens. It may be reduced to a level that does not cause quality problems. According to the knowledge of the present inventors, if the viscosity of the coating liquid 14 is 2000 mPa's or less, the rib stripes can be easily leveled to a level that does not cause a problem in quality. In addition, when the coating rod is rotated in the forward direction with the resin film in the mouth coat method, air bubbles are mixed into the meniscus formed at the part where the coating rod and the resin film are separated from each other, and a coating streak called a foam streak may occur.
- the winding angle ⁇ is adjusted around the coating rod 11 while observing the state of the coated surface. If the winding angle ⁇ is too small, the coating solution 14 cannot be sufficiently smoothed, resulting in uneven coating thickness, and if it is too large, foam streaks are formed. According to the knowledge of the present inventors, the winding angle ⁇ where the state of the coated surface is the best is within the range of 3 degrees or more and 10 degrees or less. As shown in Fig. 5, the winding angle ⁇ is the section where the resin film 1 is wound around the outer periphery of the coating rod 11 in the cross section perpendicular to the axis of the coating rod 11. 11 axis center It is expressed in angle.
- the winding angle ⁇ is the tangential slope ⁇ 1 corresponding to the film path between the coating rod 11 and the guide hole 2 and the film path between the coating rod 11 and the guide roll 19.
- the slope S from the horizontal of the tangent line corresponding to can be calculated as the sum or difference of ⁇ 2.
- FIG. 2 is a side view of the coating apparatus according to the second embodiment of the present invention.
- FIG. 4 is a front view of the coating rod and supporting means arranged on the lower surface side of the resin film of the second embodiment of the present invention.
- the difference from the first embodiment described above is that a high-viscosity first surface is formed on the upper surface of the resin film 1 by using the coating rod 21 as the second coating rod instead of the guide roll 19 in the first embodiment. That is, the coating liquid 14 that is the coating liquid is applied, and at the same time, the coating liquid 24 that is the low-viscosity second coating liquid is applied to the lower surface of the resin film 1.
- the coating rod 21 plays the role of the guide roll 19 in the first embodiment, and at the same time functions to form a coating film on the lower surface and at the same time.
- the configuration of the discharge cap 18 is the same as that of the first embodiment, and the description thereof is omitted here.
- the coating rod 21 is arranged on the downstream side of the coating rod 11 and the upstream side of the tenter 4 and on the lower surface side of the resin film 1.
- the coating rod 21 is a wire rod in which a wire is wound around the outer peripheral surface of a smooth round bar V to form a groove, or a rolling rod in which a groove is formed by rolling on the outer peripheral surface of a smooth round bar. Conventionally known ones can be used.
- the material is preferably stainless steel, particularly SUS304 or SUS316 force S.
- the surface of the coating rod 21 may be subjected to a surface treatment such as hard chrome plating.
- the diameter of the coating rod 21 is preferably 5 to 40 mm, more preferably 10 to 30 mm.
- the coating rod 21 is rotated in the forward direction at approximately the same speed as the resin film 1 in order to prevent the resin film 1 from being damaged.
- the coating amount can be adjusted by the size of the groove formed in the coating rod 21 as in the conventional rod coating method.
- the size of the groove is that the coating rod 21 is the wire mouth Can be changed by rolling with a die with different groove depth and / or groove pitch.
- the coating liquid supply means 43 which is a second coating liquid supply means for continuously supplying an excessive amount of the coating liquid 24 to the lower surface of the resin film 1, includes a tank 25, a pump 26, a filter 27, and a discharge nozzle 28.
- a temperature adjusting means or a defoaming means of the coating liquid 24 may be provided.
- the coating liquid 24 supplied to the lower surface of the resin film 1 by the pump 26 is scraped off by the coating rod 21 at the contact portion between the coating rod 21 and the resin film 1.
- the application width of the coating liquid 24 is adjusted by the discharge width of the discharge nozzle 28. Since the pump 26 is required to have a certain amount of quantification and low pulsation, a gear pump, a diaphragm pump and a mono pump are preferred.
- the support body 23 of the coating rod 21 is composed of a pair of rollers 22, and a plurality of the support bodies 23 are intermittently arranged in the longitudinal direction of the coating rod 21.
- the coating rod 21 that supports the resin film 1 is also strongly pressed against the resin film 1. Therefore, like the coating rod 11, the coating rod 21 is rotatably supported in the circumferential direction by a support body 23 constituted by a pair of rollers 22.
- a general-purpose bearing can be used with a diameter of the roller 22 of 8 mm or more, it is preferable that the diameter of the roller 22 is not more than twice the diameter of the preferred coating rod 21 because an arrangement space can be secured. It is preferable that the roller 22 has a width of 3 mm or more because a general-purpose bearing can be used, and it is preferable that the width of the roller 22 is not more than twice the diameter of the coating rod 21. This is preferable because the hit can be reduced.
- the preferred material used for the surface layer of the roller 22 and its thickness and hardness are the same as those of the roller 12.
- the support means 41 as the second support means of the coating rod 21 rotates in the circumferential direction of the coating rod 21 at a plurality of support bodies 23 including a pair of rollers 22 and at least one end of the coating rod 21. And a holder 42 that can freely move and restrain the movement in the axial direction and the vertical direction. It is preferable to arrange the support spacing L2 of the support 23 so that the amount of stagnation of the coating rod 21 is 10 m or less. The amount of stagnation is applied to the coating rod 21 by the reaction force in the out-of-plane direction of the resin film 1 calculated from the tension applied in the traveling direction of the resin film 1 and the winding angle of the resin film 1 with respect to the coating rod 21.
- Equal distribution weight, roller 22 as support point, and coating rod 21 What is necessary is just to obtain
- the arrangement interval L2 of the support 23 is 7 to 15 times the diameter of the coating rod 21.
- the axial center distance Lb between the coating rod 11 and the coating rod 21 is such that the width of the resin film 1 is W, the diameter of the coating rod 11 is Dc, and the diameter of the coating rod 21 is In the case of D2, it is preferably Dc + D2 or more and W / 2 or less. The reason is the same as in the first embodiment.
- the viscosity of the coating liquid 24 supplied to the lower surface of the resin film 1 is preferably 1 to 50 mPa's, particularly preferably a low viscosity as in the case of a conventional coating rod.
- the film formed by the coating liquid 24 is used to improve the slipperiness for facilitating the transport and winding of the resin film 1 and the adhesion when the resin film 1 is bonded to other members. It is preferable to have characteristics such as easy adhesion.
- an aqueous coating liquid containing at least one selected from water-dispersible acrylic resins, polyurethane resins, and polyester resins as a main component is preferable!
- the winding angle ⁇ is the same as in the first embodiment, but ⁇ 2 is the inclination of the tangent line corresponding to the film path between the coating rod 11 and the coating rod 21 from the horizontal.
- Intrinsic viscosity also referred to as intrinsic viscosity
- 0.662dl / g measured in o-black phenol at 25 ° C in accordance with JIS K7367 standard
- a chip of polyethylene terephthalate (hereinafter abbreviated as PET) 180 After sufficiently drying in vacuum at ° C, supply to extruder 91, melt at 285 ° C, extrude into sheet form from T-shaped base 92, mirror surface with surface temperature of 23 ° C using electrostatic casting method The film was wound around a cast drum 93 and solidified by cooling to obtain an unstretched film.
- this unstretched film is heated with a roll group heated to 80 ° C in a longitudinal stretching machine, and further stretched 3.2 times in the longitudinal direction while being heated with an infrared heater, and adjusted to 50 ° C.
- the uniaxially stretched resin film 1 was obtained by cooling with the cooled roll.
- the width W of resin film 1 is 1600mm I got it.
- the coating solution 14 was applied to the upper surface of the resin film 1 running at a speed of 25 m / min using the coating apparatus shown in FIG.
- both ends of the resin film 1 coated with the coating liquid 14 are gripped by the clips 3 of the tenter 4, guided into a 90 ° C oven, and heated, and then in the 100 ° C oven.
- the film is stretched 3.7 times in the width direction and further cured 5% in the width direction in an oven at 220 ° C.
- the coating solution 14 is cured and the film is heat-set, and a cured film of the coating solution 14 is applied on one side.
- a formed biaxially stretched film was obtained.
- the tension between the longitudinal stretching machine 94 and the lateral stretching machine 95 was controlled by a dancer roll so that the tension per unit width in the running direction of the film was 80 OON / m.
- the roller 12 was constructed by bonding a thermoplastic polyurethane elastomer having a thickness of 2.5 mm and a hardness of 90 A to the surface of an aluminum pipe material having a diameter of 17 mm and a width of 16 mm.
- the support 13 is configured such that two rollers 12 are horizontally arranged with a distance of 24 mm between the shaft centers, and the rollers 12 are rotatable in the circumferential direction and are constrained in the axial direction and the vertical direction.
- the distance La between the axial centers of the coating rod 11 and the guide roll 19 was 800 mm, that is, half the width W of the resin film 1.
- the coating liquid supply means 33 is composed of a tank 15, a pump 16, a filter 17 and a discharge nozzle 18.
- the pump 16 was a diaphragm pump (manufactured by Takumina Co., Ltd., with a pulsation rate of ⁇ 3.5%), and the discharge rate was 650 g / min.
- the discharge nozzle 18 was a die having a slit gap of 0 ⁇ lmm and a slit width of 1200 mm.
- the temperature of the coating liquid supply means 33 was adjusted to 25 ° C.
- Coating solution 14 is a mixture of dipentaerythritol hexaatalylate and dipentaerythritol pentaatalylate (trade name: Carrad DPHA, Nippon Kayaku Co., Ltd.) 63 parts by weight (weight ratio of solids) Same as below), methylated melamine resin (trade name: Cymel 303, manufactured by Cytec Industries Inc., USA) 21 parts by weight, ethylene oxide modified trimethylolpropane tritalylate (trade name: Alonix M-350, manufactured by Toagosei Co., Ltd.) ) A mixed solution of 16 parts by weight.
- the viscosity of the coating liquid 14 was 2000 mPa's at a temperature of 25 ° C and a shear rate of 10 / s.
- the coating width immediately after smoothing with the coating rod 11 was 1400 ⁇ 20 mm, and the variation of the coating width was within an allowable range from the viewpoint of process stability.
- weak rib streaks were generated. No foam streaks occurred during the 2 hours of collecting a product length of 3000 m.
- the thickness of the biaxially stretched laminated film (cured film of coating liquid 14 + PET film) is 130 ⁇ 3 111, and the thickness unevenness is the same as that of normal PET film without coating liquid 14 Met.
- rib streaks were leveled to such an extent that they could not be seen, and horizontal unevenness was also not seen. Therefore, it was a quality level that can be shipped as a product.
- a biaxially stretched film in which a cured film of the coating liquid 14 is formed on one side is obtained in the same manner as in Example 1 except that the support 63 shown in FIG. 6 is used instead of the support 13 in Example 1.
- the support 63 is configured as a V-shaped groove extending in the axial direction of the coating rod 11 and is made of “Teflon (registered trademark)” having a good sliding property.
- Teflon registered trademark
- a biaxially stretched film having a cured film of the coating liquid 14 formed on one side was obtained in the same manner as in Example 1 except that the guide roll 19 in Example 1 was not used. At this time, a liquid pool was not sufficiently formed immediately before the contact portion between the coating rod 11 and the resin film 1 and was discontinuous in the width direction. On the coated surface immediately after smoothing with the coating rod 11, a large number of coating streaks occurred, and in some cases, the coating liquid 14 was not partially applied. Therefore, the condition of the force application surface with the pump 16 discharge rate increased to 800 g / min did not improve.
- the resin film 1 stagnates in the width direction due to the pressure of the coating liquid 14, and the coating rod 11 and the resin film 1 It was found that the coating liquid 14 supplied from the discharge nozzle 18 could be smoothed with the coating rod 11! Therefore, when the wrapping angle ⁇ of the film 1 with respect to the coating rod 11 was set to 10 degrees, the condition of the coated surface was slightly improved. However, increasing the winding angle ⁇ further abandoned the coating because the load on the coating device was large and the clip 3 could not grip the edge of the resin film 1.
- Example 1 In the same manner as in Example 1 except that the distance La between the axial centers of the coating rod 11 and the guide roll 19 in Example 1 was 1200 mm, that is, greater than 1/2 of the width W of the resin film 1, the coating liquid was applied on one side. A biaxially stretched film having 14 cured films was obtained. At this time, a liquid pool was not sufficiently formed immediately before the contact portion between the coating rod 11 and the resin film 1 and it became discontinuous in the width direction, and many coating streaks were generated on the coating surface.
- the coating width immediately after smoothing with the coating rod 11 was 1400 ⁇ 20 mm, and the variation of the coating width was within an allowable range from the viewpoint of process stability.
- the thickness of the laminated film (cured film of coating solution 14 + PET film) after biaxial stretching was 131 ⁇ 6 m, and the thickness unevenness was worse than that of normal PET film without coating solution 14 applied. .
- the cause of the uneven thickness was that the film thickness at the center of the film was thicker than at the edges. As a result of visual observation of the appearance of the laminated film, no rib stripes, bubble stripes, or horizontal unevenness were observed. Therefore, it was a quality level that could be shipped as a product if it was limited to applications with a wide tolerance for uneven thickness.
- the distance Lb between the axial centers of the coating rod 11 and the second coating rod 21 was 100 mm.
- Roller 22 is a thermoplastic polyurethane with a thickness of 2.5 mm and a hardness of 90 A on the surface of an aluminum pipe with a diameter of 17 mm and a width of 14 mm. N elastomer was bonded and constituted.
- the support 23 is configured such that two rollers 22 are horizontally arranged at a distance of 24 mm between the shaft centers, and the rollers 22 are freely rotatable in the circumferential direction and restrained in the axial direction and the vertical direction.
- the second coating liquid supply means 43 was composed of a tank 25, a pump 26, a finer 27, and a discharge nozzle 28. Pump 26 ⁇ or gear pump was used and the discharge rate was 15kg / min.
- the discharge nozzle 28 was a fountain with a slit gap of 0.3 mm and a slit width of 1300 mm.
- the coating liquid 24 sprinkled off with the coating rod 21 was collected in the tank 25 via the liquid receiver 29 and reused.
- Coating liquid 24 is an emulsion of polyester copolymer (containing components: 90 mol% terephthalic acid, 10 mol 0 / sodium sulfoisophthalic acid, 96 mol 0 / ethylene glycol, 3 mol 0 / ne neopentyl glycol, jetty) 5 parts by weight of melamine crosslinking agent (imino group-type methylated melamine diluted with a mixed solvent of 10% by weight of isopropyl alcohol and 90% by weight of water) A mixed solution was prepared by adding 1 part by weight of colloidal silica particles having a diameter of 0.1 m.
- the viscosity of the coating liquid 24 was 2 mPa ′s at a temperature of 25 ° C. and a shear rate of 10 / s.
- the coating liquid 24 was dried in the tenter 4 oven until stretching in the width direction started. Otherwise, in the same manner as in Example 1, a biaxially stretched film was obtained in which a cured film of the coating liquid 14 was formed on one side and a dried film of the coating liquid 24 was formed on the opposite side.
- the coating width of the coating liquid 14 immediately after smoothing with the coating rod 11 is 1400 ⁇ 20 mm
- the coating width of the coating liquid 24 immediately after weighing with the second coating rod 21 is 1420 ⁇ 50 mm. It was an acceptable range from the viewpoint of process stability.
- the coated surface of the coating solution 14 immediately after smoothing is visually observed with the coating rod 11, the force that the weak rib streaks were generated.
- the product length 3000 m was collected. I got it.
- the thickness of the biaxially stretched laminated film (cured film of coating solution 14 + PET film + dried film of coating solution 24) is 130 ⁇ 3 m, and the thickness unevenness was applied to one side of coating solution 24. It was equivalent to just ordinary PET film.
- Mixing ratio of coating liquid 14 is a mixture of dipentaerythritol hexaatalylate and dipentaerythritol monopentaatalylate (trade name: Carrad DPHA, Nippon Kayaku Co., Ltd.) 67 parts by weight (solid content weight ratio, The same applies hereinafter), methylated melamine resin (trade name: Cymel 303, manufactured by Cytec Industries Inc., USA) 22 parts by weight, ethylene oxide-modified trimethylolpropane tritalylate (trade name: Aronix M-350, manufactured by Toagosei Co., Ltd.) Except for changing to 11 parts by weight, a biaxially stretched film was obtained in the same manner as in Example 3 except that a cured film of coating solution 14 was formed on one side and a dried film of coating solution 24 was formed on the opposite side.
- the viscosity of this coating liquid 14 was 2500 mPa ′s at a temperature of 25 ° C. and a shear rate of 10 / s.
- the viscosity of this coating liquid 14 was 2500 mPa ′s at a temperature of 25 ° C. and a shear rate of 10 / s.
- weak rib streaks were generated.
- bubble streaks occurred three times during the two hours when a product length of 3000 m was collected.
- rib stripes were leveled on the coated surface of the coating liquid 14 so as not to be visually recognized.
- the horizontal unevenness was not visually recognized.
- bubble streaks were visible. Therefore, if a bubble streaks was marked as a defective part, it was a quality level that could be shipped as a product.
- a cured film of coating solution 14 was formed on one side and a dried film of coating solution 24 was formed on the opposite side in the same manner as in Example 3 except that the supply means of coating solution 14 was heated to 55 ° C.
- a biaxially stretched film was obtained.
- the viscosity of the coating liquid 14 was 200 mPa ⁇ s at a temperature of 55 ° C. and a shear rate of 10 / s.
- Power ivy.
- As a result of visually observing the appearance of the laminated film after biaxial stretching it was found that neither rib streaks nor horizontal unevenness was observed on the coated surface of coating liquid 14. Therefore, it was a quality level that could be shipped as a product.
- a cured film of coating liquid 14 was formed on one side and a dried film of coating liquid 24 was formed on the opposite side in the same manner as in Example 3 except that the supply means of coating liquid 14 was heated to 65 ° C. Biaxial stretching I got Lum.
- the viscosity of the coating liquid 14 was lOOmPa ⁇ s at a temperature of 65 ° C. and a shear rate of 10 / s.
- the liquid pool formed immediately before the contact portion between the coating rod 11 and the resin film 1 fluctuated.
- force streaks that did not generate rib streaks Bubble streaks were generated 5 times in 2 hours of sampling 3000m.
- the thickness of the biaxially stretched laminated film (cured film of coating solution 14 + PET film + dried film of coating solution 24) is 130 ⁇ 4 m, and the thickness unevenness was applied to one side of coating solution 24. Only a little worse than normal PET film. As a result of visual observation of the appearance of the laminated film, no rib streaks or horizontal unevenness was observed on the coated surface of the coating liquid 14, but bubble streaks were visible. Therefore, if the bubble streaks are marked as defective, and limited to applications with a wide tolerance range of thickness unevenness, the quality level can be shipped as a product.
- coating solution 14 By applying coating solution 14 on the top surface of resin film 1, a laminated film with a quality level that can be shipped as a product could be obtained.
- the thickness unevenness of Example 2 is larger than Example 1, it is more preferable that the axial center distance La between the coating rod 11 and the guide roll 19 is not more than half of the width W of the resin film 1. It can be said.
- the second coating rod 21 instead of the guide roll 19 is substantially the same in that it supports the lower surface of the resin film 1, so the coating rod 11 and the second coating rod 21 It is more preferable that the distance Lb between the axial centers of the resin film is less than half of the width W of the resin film 1.
- the viscosity of coating solution 14 is more preferably 200 to 2000 mPa's.
- Example 1 2 0 0 0 Roller 1 2 Guide wheel / 1 9 8 0 0 Good Supportable carrier 1 3
- Comparative example 1 2 0 0 0 0 Support for V-shaped groove Guide roll 1 9 8 0 0 Horizontal unevenness Impossible Body 6 3
- Example 2 2 0 0 0 Has a ladle 1 2 Guide roll 1 9 1 2 0 0 Thickness variation is large Support for limited use 1 3
- Shipable Example 3 2 0 0 0 Roller 1 2
- Existence Second coating rod 2 1 1 0 0 Good Shippable support 1 3
- Example 4 2 5 0 0 Roller 1 2 2nd coating pad 2 1 1 0 0 Foam streaks that mark defective parts in 2 hours 1 3 Can be generated and shipped 3 times
- Example 5 2 0 0 With roller 1 2 2nd coating pad 2 1 1 0 0 Good Supportable carrier 1 3
- Example 6 1 0 0 Roller 1 2 2nd coating pad 2 1 1 0 0 Foam streaks Supporting the defective part in 2 hours 1 3 5 times, thickening, limiting use Unevenness is also slightly large.
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Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020097004713A KR101445406B1 (ko) | 2006-09-08 | 2007-08-31 | 도포 방법 및 도포 장치 |
| CN2007800332522A CN101511492B (zh) | 2006-09-08 | 2007-08-31 | 涂覆方法和涂覆装置 |
| US12/440,128 US8535763B2 (en) | 2006-09-08 | 2007-08-31 | Coating method and coating apparatus |
| EP07806444A EP2060327A4 (en) | 2006-09-08 | 2007-08-31 | COATING METHOD AND COATING APPARATUS |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2006243956 | 2006-09-08 | ||
| JP2006-243956 | 2006-09-08 |
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| WO2008029718A1 true WO2008029718A1 (fr) | 2008-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2007/066967 Ceased WO2008029718A1 (fr) | 2006-09-08 | 2007-08-31 | Procédé de revêtement et appareil de revêtement |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8535763B2 (ja) |
| EP (2) | EP2060327A4 (ja) |
| KR (1) | KR101445406B1 (ja) |
| CN (1) | CN101511492B (ja) |
| TW (1) | TWI408008B (ja) |
| WO (1) | WO2008029718A1 (ja) |
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- 2007-08-31 KR KR1020097004713A patent/KR101445406B1/ko not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011128408A (ja) * | 2009-12-18 | 2011-06-30 | Konica Minolta Opto Inc | ハードコートフィルムの製造方法、ハードコートフィルム、偏光板、および画像表示装置 |
| CN115041352A (zh) * | 2022-07-04 | 2022-09-13 | 四川晨飞科技有限公司 | 一种压敏胶涂布生产方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2060327A4 (en) | 2011-06-08 |
| KR20090051744A (ko) | 2009-05-22 |
| TWI408008B (zh) | 2013-09-11 |
| TW200822977A (en) | 2008-06-01 |
| CN101511492B (zh) | 2013-09-18 |
| US20100117255A1 (en) | 2010-05-13 |
| US8535763B2 (en) | 2013-09-17 |
| EP2060327A1 (en) | 2009-05-20 |
| EP2468421A2 (en) | 2012-06-27 |
| KR101445406B1 (ko) | 2014-09-26 |
| CN101511492A (zh) | 2009-08-19 |
| EP2468421A3 (en) | 2012-10-24 |
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