JPH09141173A - Coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unevenness of the thickness of a coating film and failure of coating and improve production yield by installing a pushing member to push a supporting body to the periphery of a coater in a prescribed direction, in the case of coating a continuously transported supporting body by using an extrusion type coater. SOLUTION: When a supporting body W is transported by winding with a guide roll 61, a support roll, and a guide roll 62, a uniform thin film is applied at high speed by an extrusion type coater 50. In such a coating apparatus, a support roll mechanism 70 in which the support roll is made to contact with a part of the supporting body in the width direction is installed. The mechanism 70 makes the support roll contact with a part of the supporting body W in the width direction by applying a pneumatic pressure to a tip end part of a piston frame through a cylinder. Consequently, flap of the supporting body W at the edge part in the width direction is solved and a proper tension is applied, so that coating is carried out excellently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method and a coating apparatus, and more particularly to an extruding apparatus for applying a thin film of a coating solution continuously discharged onto a moving support surface to a uniform thickness on the support surface. The present invention relates to a coating device using a rouge type coating head.

[0002]

2. Description of the Related Art Conventionally, various methods of applying a predetermined coating liquid to the surface of a flexible support have been studied and carried out. Among the various coating methods, for example, an extrusion type coating apparatus that applies a thin film of a coating liquid continuously extruded toward the surface of a moving support to a uniform thickness on the surface of the support is a reverse type coating device. Compared with roll type coating methods such as roll, kiss roll, and gravure roll, there are many advantages in terms of coating uniformity, thin film property, and coatable speed range. Further, the extrusion type coating method is capable of simultaneous multi-layer coating by so-called wet-on-wet, and is very effective in terms of cost and performance for the production method of coating products having high added value these days.

In order to achieve the multi-layer structure, a coating solution is applied one by one onto a support as disclosed in, for example, JP-A Nos. 51-119204, 52-51908 and 53-16604. Conventionally, a method of forming a multi-layered coating layer by coating and drying has been performed. However, this method has problems such as poor productivity and difficulty in thinning the uppermost layer because the steps such as coating and drying are repeated, and there are problems such as JP-A-48-98803 and JP-A-61-11.
No. 1168 discloses a method for producing a magnetic recording medium by simultaneous wet-on-wet multi-layer coating, both of which are pre-layered on the continuously running support held on a back roll. This is a method of applying a coating liquid, and the rotation blur accuracy of the back roll is insufficient, and coating unevenness easily occurs in the coating longitudinal direction, making it difficult to manufacture an optimum magnetic recording medium.

Therefore, as disclosed in JP-A-62-124631, a method in which the lower layer is in a wet state and the upper layer is coated on a support without holding a back roll, or JP-A-63-88080. A coater head having a slit through which two coating liquids are drawn has been devised as disclosed in Japanese Patent Laid-Open No. 2-251265.

However, a problem with such an extrusion type coating method is that the flatness of the support is affected by coating on a support not supported by a back roll. Even if the support is deformed to some extent if it is supported by the back roll, the effect of deformation is almost eliminated by wrapping around the back roll, but without support of the back roll, the support is conveyed to the coater section while being deformed, By coating the deformed portion, the uniformity of the coating film thickness is significantly impaired, and sometimes an uncoated portion, that is, a so-called coating omission may occur.

On the other hand, conventionally, a reference is set for the amount of deformation of the support, the support is inspected before coating, and only the support having a smaller deformation than the reference is used for coating, or the flatness of the support itself is improved. However, although it is inferior to the extrusion type coating method in coating uniformity, thin film property, coatable speed range, and multi-layer coating suitability, it is acceptable to other coating methods.

Further, in order to remove vertical wrinkles caused by deformation of stripes of a thin support, that is, pulling in the transport direction by transport tension, Japanese Patent Laid-Open No. 6-254466.
Japanese Patent No. 10-242242 discloses a technique relating to tenter rolls.

On the other hand, the inventors of the present invention have disclosed in JP-A-1-203075 a device for preventing thickening at both ends in the width direction caused by the influence of the tension distribution in the width direction on a uniform support.

[0009]

[Patent Document 1] Japanese Unexamined Patent Publication No. 6-25446
In the method of using the tenter roll disclosed in No. 6, it is an effective means for the unevenness of the coating film thickness due to local deformation such as one-side extension in the width direction and extension of the end portion in the width direction which the support originally has. It's not.

On the other hand, the inventors of the present invention have disclosed in Japanese Unexamined Patent Publication No. 1-20307.
The device disclosed in No. 5 is basically applied to a uniform support, but it is effective for the deformation in which both widthwise ends of the support uniformly extend in the transport direction. Furthermore, it was suggested that the roll can be made movable so that the degree of pushing into the support can be adjusted as a method of coping with factors that cause film thickness variations within different lots even within the same product type. Factors and roll moving methods / mechanisms have not been examined, and it was not possible to deal with uneven support deformation in the support conveyance direction or width direction.

Therefore, the object of the present invention is to improve the product yield and to reduce the tension without uneven coating film thickness or coating loss even if the support is deformed in the width direction or the conveyance direction. Extrusion-type coating device that reduces the amount of product defects by expanding the range of applicable products and reducing the number of product defects. It is to provide a coating method.

[0012]

The above object of the present invention can be achieved by any of the following technical means (1) to (9).

(1) In a coating apparatus for coating a continuously transported support by using an extrusion type coater, the support is pressed in a predetermined direction in the vicinity of the extrusion type coater. A coating device comprising a pressing member.

(2) The coating apparatus according to item (1), wherein the pressing member is a heating means provided upstream of the extrusion type coater in the transport direction.

(3) The heating means has a glass transition point Tg.
The coating apparatus according to (2) above, which is a blowing unit that blows warm air having the above temperature.

(4) The heating means has a glass transition point Tg.
The coating apparatus according to the item (2), which is a hot roll having the above temperature.

(5) The pressing means is a roller that rotates with the conveyance of the support, and the roller is rotatably provided at least about the conveyance direction of the support as a rotation axis, and The coating apparatus according to (1), (2) or (4) above, which is elastically supported.

(6) Detecting means for measuring the amount of deformation of the widthwise end portion of the support, and pressing means, which are rollers that rotate with the conveyance of the support, and at least the support. A roller that is rotatably provided with the body transport direction as a rotation axis, a moving unit that moves the roller in at least the thickness direction of the support, and a moving unit that is driven according to the deformation amount. (1), (2), (4) or (5), characterized by comprising a control means.
The coating device according to Item.

(7) When viewed from the coater, the roller is at least any one of three positions, namely, the upstream side and the coater side in the carrying direction, the upstream side in the carrying direction and the anti-coater side, and the downstream side in the carrying direction and the anti-coater side. The coating apparatus according to (5) or (6) above, which is provided at one place.

(8) The above-mentioned (4), wherein the pressing member is a roller pair that nips the support.
The coating device according to (5) or (6).

(9) In any one of the above (1) to (8), the pressing member is provided so as to press the widthwise end of the support in a predetermined direction. The coating apparatus according to item 1.

In the coating apparatus of the present invention, a heating means or a support roll is used as the support deformation removing means. Although hot air, hot air, or a hot roll is used as the heating means, the heating means is not limited to these, and infrared rays, electron beams (microwave), or the like can be used as long as it can heat the support. As the support roll, the support roll has an elastic mechanism in which the amount of pressing against the support changes according to the amount of deformation of the support, or a mechanism that detects the amount of deformation of the support and the support roll movement corresponding to that amount of deformation. A support roll having a mechanism is used.

Further, it is desirable that the support roll is installed between the guide roll on the upstream side of the coater and the coater on both sides of the coater side and the non-coater side of the support, or on one side thereof. Further, it is desirable that the support is installed alone or in combination on the side opposite to the coater between the guide rolls on the downstream side of the coater and the coater.

The above-mentioned support deformation removing means is extremely effective especially when it is used at both ends in the support width direction where the support is strongly deformed.

The present invention also uses the above coating apparatus,
The present invention also provides a coating method for continuously coating a flexible support with a coating liquid having an extremely uniform coating thickness.

Deformation of the support is non-uniform during the production of the support. Deformation that occurs due to heat treatment / subtraction of the support. Deformation due to gravity during storage of the support. Vibration, load, impact, etc. during transport of the support. Deformation due to It is natural to prevent all these deformations from occurring as before, but since there are various causes of occurrence, it is not only difficult to completely prevent them from being technically completely deformed, but also labor and cost. Is huge and not a good idea.

As a result of earnest studies on the solution method, the present inventors have noticed that it is more effective not to prevent the occurrence of deformation but to remove the generated deformation at the time of coating, and the support is deformed during coating. I found a removal device.

The means for heating the support just before the coating, which is the device for removing the deformation of the support during coating, can heat the support to a temperature at which the support is plastically deformed, and at that time, the support is heated. It is desirable to be able to apply a certain amount of tension in order to stretch it uniformly.

Further, as a support-deformation-removing device during coating, support rolls are provided in front of and behind the coater, and the pressing force of the support rolls against the support is weak according to the amount of deformation (elongation) of the support. If it is large, the tension of the support at the edge of the coater is kept uniform and the coating film thickness is kept uniform by pressing it strongly. Therefore, it is possible to perform uniform coating without coating unevenness. It is simple and practical to use the deformation of the support itself by using an elastic body such as a spring as a means to make the pressing force of the support roll against the support correspond to the amount of deformation (elongation) of the support. Is. In addition, by detecting the amount of deformation of the support with a displacement sensor and controlling the pressing force of the support roll against the support according to this displacement amount, the support roll pressing force can be controlled arbitrarily, resulting in higher accuracy. The coating film can be made uniform.

This apparatus for removing the deformation of the support during coating using the support roll is particularly effective when the end portion in the width direction of the support is unevenly extended to form a bud-like deformation.

[0031]

EXAMPLES Examples of the coating method of the present invention will be described below with reference to FIGS. 1 to 10, but the present invention is not limited to the following examples.

A support W such as a film or paper is wound around a guide roll 61, a support roll 71, and a guide roll 62, conveyed in the direction of the arrow shown in the perspective view of FIG. The coating surface of 50 is hereinafter referred to simply as a coater) so that the surface of the support W is uniformly contacted with the surface of the support W so that uniform thin film high-speed coating is performed.

As shown in FIG. 1, the support roll mechanism 70 has a support roll 71 over the entire width of the support W.
The means for contacting a part of the width direction is not used. The support roll mechanism 70 is provided with a support roll 71 rotatably mounted on the tip of a piston frame 72 as shown in the side sectional view of FIG.
By applying air pressure through the piston frame 72 and the cylinder 73, the support roll 71 is brought into pressure contact with a part of the support body in the width direction.

The coater 5 shown in FIGS.
The support roll contacts on the same side as the coater 50 on the upstream side of 0. In the side sectional view of FIG. 7, the support roll 71 is also the coater 50.
, But they are in pressure contact with each other so as to press the support surface on the side opposite to the coater 50. In this case, as a pressure contact means, a spring 74 urges the piston frame 72 to pull up in the cylinder 73. Further, since the support roll mechanism 70 as shown in FIG. 7 is arranged so that the support roll 71 is in pressure contact with the surface of the support W opposite to the coating surface, the support roll 71 is supported as shown in the side sectional view of FIG. It is also possible to provide it not on the upstream side of the body W but on the downstream side.

It should be noted that the roll surface of the support roll 71 in the support roll mechanism 70 of the above-described various forms is pressed in the thickness direction of the support W so as to always follow the surface of the support W and fit in a uniform state. It has a different structure.

To give an example of the structure, as shown in the perspective view of FIG.
5 is rotatably held, and the frame 75 is rotatably held by the swing lever 77 via a swing shaft 76 provided on the swing lever 77 in the transport direction of the support W. , The swing lever 77 is swingably held around a fixed shaft 78, and the swing lever 77 is always biased by a spring 79 so that the support roll 71 is pressed against the support W, and therefore, The support roll 71 is rotated around the rotation shaft 76, and is thereby given a touch and a pressing force in a state of being uniformly fitted to the support W.

As a result, the fluttering of the end portion of the support W in the width direction is eliminated, and an appropriate tension is applied in the width direction of the support W as well, so that a suitable coating is possible. .

A stopper (not shown) is provided on the frame 75 and the rocking lever so that the frame 75 and the rocking lever do not rotate over a predetermined range without being restricted.

Further, in the side sectional view of FIG. 5, a heating section 40 of the support W is provided on the upstream side of the support transport path, hot air is sent into the heating chamber 41, and the support W passing therethrough is heated. The wakame-shaped wrinkles schematically shown in the plan view of the support member in FIG. 8 are corrected when passing through the support roll 71.

As described above, the wrinkles of the support W occur as an unavoidable phenomenon to some extent during the transportation and storage from the previous step.

As another example of the heating means 40 for the support W, a heating roll 45 as shown in the side sectional view of FIG.
It is also possible to use one provided with, and the same effect as that using the heating chamber 41 can be obtained.

By such means, the wrinkles on the edge of the support W as shown in FIG. 8 are returned to the normal state as shown in FIG. 9 and can be directed to the position of the coater 50. Become.

The results obtained by using such a coating apparatus of the present invention are shown below.

Using the coating solution, coater and support deformation removing means described below, a support having a width of 1000 mm was coated with a length of 10000 m, and the variation in film thickness in the support transport direction at the end of the support width direction was measured. Then, the average values were compared.

Coating liquid 1 <Magnetic coating liquid> 100 parts of ferromagnetic metal powder (average major axis diameter: 0.15 μm, σ _s : 1.25 emu / g, axial ratio: 8, pH: 9.5, crystal size: 145Å, Hc: 1700 Oe, BET: 53 m ² / g) Potassium sulfonate group-containing vinyl chloride resin 10 parts (Nippon Zeon Co., Ltd. MR-110) Sodium sulfonate group-containing polyurethane resin 10 parts (Toyobo Co., Ltd. ), UR-8700) α-alumina (0.15 μm) 8 parts Stearic acid 1 part Butyl stearate 1 part Cyclohexanone 100 parts Methyl ethyl ketone 100 parts Toluene 100 parts Coating liquid 2 <Lower layer coating liquid A> α-Fe ₂ O ₃ 100 parts (major axis diameter: 0.10 μm, minor axis diameter: 0.02 μm, axial ratio: 9, BET: 55 m ^{2 /} g, pH: 7.5, crystal size: 2 20Å, surface treatment with Si, Al compound, Si content 0.1% by weight, Al content 0.3% by weight) Potassium sulfonate group-containing vinyl chloride resin 12 parts (manufactured by Nippon Zeon Co., Ltd. MR-110) Sodium sulfonate group-containing polyurethane resin 8 parts (Toyobo Co., Ltd., UR-8700) α-alumina (average particle size: 0.2 μm) 5 parts Carbon black (average particle size: 15 nm, DBP oil absorption: 8. 5 ml / 100 g, pH: 8.0 BET value: 255 m ² / g, volatile matter; 1.1%, coloring power: 130%) 10 parts Stearic acid 1 part Butyl stearate 1 part Cyclohexanone 100 parts Methyl ethyl ketone 100 parts Toluene 100 parts A polyisocyanate compound (Coronate L, Nippon Polyureta Co., Ltd.) was added to each of the obtained magnetic coating liquid and lower layer coating liquid A. 5 parts (manufactured by K.K.) was added.

Coating Liquid 3 <Coating Liquid B for Lower Layer> The coating liquid B for lower layer is α-Fe ₂ in the coating liquid A for lower layer.
Instead of O ₃ , Co-γ-Fe ₂ O ₃ (Hc: 650 O
e, major axis diameter: 0.22 μm, BET value: 45 m ² / g,
A pH of 5.0, an axial ratio of 1.2, σ _{s of} 75 emu / g, and a crystallite size of 200 Å were obtained in the same manner as in the lower layer coating liquid A.

Coating Liquid 4 <Coating Liquid D for Lower Layer> Needle-shaped TiO ₂ (major axis diameter: 0.12 μm, axial ratio: 6, BET) in place of the needle-shaped α-Fe ₂ O ₃ in Coating Liquid A for lower layer.
Value: 40 m ^{2 /} g, pH: 7.0, SiAl compound (S
i: 0.1% by weight, Al: 0.4% by weight))
Was obtained in the same manner as in the lower layer coating liquid A except for using.

Coating Solution 5 <Coating Solution E for Lower Layer> Spherical TiO ₂ (average particle diameter: 32 nm, BET value: 40 m ² / in place of needle-shaped α-Fe ₂ O ₃ in Coating Solution A for lower layer)
g, pH: 7.5, crystal diameter: rutile, SiAl compound (Si: 0.1% by weight, Al: 0.3% by weight) was used in the same manner as in the lower layer coating liquid A, except that the surface treatment was performed. I got it.

Coating liquid 6 Carbon black (Raven 1035) 40 parts Barium sulfate (average particle size 300 nm) 10 parts Nitrocellulose 25 parts Polyurethane resin 25 parts (N-2301 manufactured by Nippon Polyurethane Co., Ltd.) Polyisocyanate compound 10 parts (Nippon Polyurethane Co., Ltd., Coronate L) Cyclohexanone 400 parts Methyl ethyl ketone 250 parts Toluene 250 parts Coating liquid 7 <subtraction liquid> Copolymer latex quoted below (solid content 30%) (below) 270 g butyl acrylate 30 wt% t -Butyl acrylate 20% by weight Styrene 25% by weight 2-Hydroxyethyl acrylate 25% by weight The following compound (UL-1) 0.6 g Hexamethylene-1,6-bis (ethyleneurea) 0.8 g Water is made up to 1 liter.

Coating Liquid 8 <Subbing Liquid> Below-referenced copolymer latex (solid content 30%) (below) 270 g butyl acrylate 40% by weight styrene 20% by weight glycidyl methacrylate 40% by weight The following compound (UL-1) 0. 6 g Hexamethylene-1,6-bis (ethylene urea) 0.8 g Water is made up to 1 liter.

Coating Liquid 9 <Submersion Liquid> Gelatin 10 g Compound (UL-1) 0.2 g Compound (UL-2) 0.2 g N, N ′, N ″ -acryloyl-s-triazine 0.1 g Silica Particles (average particle diameter: 3 μm) 0.1 g Water is made up to 1 liter.

Coating liquid 10 <Antistatic processing liquid> Polymeric antistatic agent (number average molecular weight of about 5000) (below) 60 g Sodium p-styrenesulfonate 75% by weight Maleic anhydride (hydrolyzed after polymerization) 25% by weight Copolymerized latex (solid content 20%) (below) 80 g Styrene 40% by weight Acrylic acid 5% by weight Butyl acrylate 10% by weight Acrylamide 5% by weight Butyl methacrylate 40% by weight Ammonium sulphate 0.5 g Curing agent (compound UL-3 below) 0 0.5 g PEG (weight average molecular weight 600) 12 g Water is made up to 1 liter. 6 g Coating liquid 11 <Magnetic coating liquid> Co-γ-Fe ₂ O ₃ 10 parts (Hc: 900, BET value: 45 m ² / g) Diacetyl cellulose 100 parts α-alumina (average particle size: 0.2 μm) 5 parts Stearic acid 3 parts Carnauba wax 10 parts Cyclohexanone 100 parts Acetone 100 parts

[0053]

Embedded image

The following three types of coaters were used.

Coater 1 A single-layer coater described in JP-A-01-288364, which is shown in the side sectional view of FIG.

Coater 2 A multilayer coater described in JP-A-02-268862, which is shown in the side sectional view of FIG.

Coater 3 A multilayer coater described in JP-A-02-251265, which is shown in the side sectional view of FIG.

That is, the coater 1 is a single-layer coater shown by 50A in FIG. 2, and the coating solution extruded from the chamber 4 through the slit 3 is conveyed along the front edge 1 and the back edge 2. It is adapted to be applied on the body W.

Further, the coater 2 is a multi-layer coater indicated by 50B in FIG. 3, and the two types of coating liquids extruded from the chambers 4, 5 through the slits 6, 7 by the slit 3 are laminated. , The front edge 1 and the back edge 2 are multi-layered on the support W conveyed.

The coater 3 is a multi-layer coater indicated by 50C in FIG. 4, which is extruded from the chambers 4 and 5 through the slits 8 and 9, respectively, and extends along the front edge 10, the intermediate edge 30, and the back edge 20. The multi-layered coating is performed on the support W that is conveyed as a whole.

Support Deformation Removing Means Support Roll Moving Method Support Roll Position Means 1 Before Spring Coater / Coater Side Means 2 Just Before Spring Coater / Anti Coater Side Means 3 Immediately After Spring Coater / Anti Coater Side 4 Before Spring Coater Before Guide Roll Means 5 After spring coater After guide rolls Means 6 Air cylinder Immediately before coater / Coater means 7 Displacement detection of support by laser displacement meter Immediately after coater interlocking with stepping motor / Counter 8 Means 8 Heating: 110 ° C to support before coating Apply hot air for 10 seconds.

Means 9 Heating: Prior to coating, the support was conveyed to a roller heated to 200 ° C. and having a diameter of 300 mm.

Means 10 tenter roll (described in JP-A-6-254466) Means 11 drum-shaped roll described in FIGS. 10 (a) and 10 (b) of JP-A-1-203075 Support deformation removing means Coating liquid coater Film thickness fluctuation (%) Example 1 Means 1 Coating liquid 1 Coater 1 1 Example 2 Means 1 Coating liquid 2 Coater 1 1 Example 3 Means 1 Coating liquid 3 Coater 1 2 Example 4 Means 1 Coating liquid 4 Coater 1 1 Example 5 Means 1 Coating Liquid 5 Coater 1 2 Example 6 Means 1 Coating Liquid 6 Coater 1 3 Example 7 Means 1 Coating Liquid 7 Coater 1 3 Example 8 Means 1 Coating Liquid 8 Coater 1 3 Example 9 Means 1 Coating Liquid 9 Coater 1 3 Example 10 Means 1 Coating liquid 10 Coater 1 3 Example 11 Means 1 Coating liquid 11 Coater 1 2 Example 12 Means 1 Coating liquid 1, 2 Coater 2 2 Example 13 Means 1 Coating Liquid 1,3 Coater 2 2 Example 14 Means 1 Coating liquid 1,5 Coater 2 2 Example 15 Means 1 Coating liquid 7,9 Coater 2 3 Example 16 Means 1 Coating liquid 8,10 Coater 2 3 Example 17 Means 1 Coating Liquid 1,5 Coater 3 3 Example 18 Means 1 Coating Liquid 7,9 Coater 3 3 Example 19 Means 2 Coating Liquid 1 Coater 1 1 Example 20 Means 3 Coating Liquid 1 Coater 1 1 Example 21 Means 4 Coating Liquid 1 Coater 1 1 Example 22 Means 5 Coating Liquid 1 Coater 1 1 Example 23 Means 6 Coating Liquid 1 Coater 1 2 Example 24 Means 7 Coating Liquid 1 Coater 1 1 Example 25 Means 8 Coating Liquid 1 Coater 1 2 Implementation Example 26 Means 9 Coating Liquid 1 Coater 1 2 Comparative Example 1 Means No Coating Liquid 1 Coater 1 7 Comparative Example 2 Means No Coating Liquid 2 Coater 1 8 Comparative Example 3 Means No Coating Liquid 3 Coater 1 Comparative Example 4 No Means Coating Liquid 4 Coater 1 8 Comparative Example 5 No Means Coating Liquid 5 Coater 1 7 Comparative Example 6 No Means Coating Liquid 6 Coater 1 9 Comparative Example 7 No Means Coating Liquid 7 Coater 1 10 Comparative Example 8 No Means Coating Liquid 8 Coater 1 10 Comparative Example 9 No Means Coating Liquid 9 Coater 1 9 Comparative Example 10 No Means Coating Liquid 10 Coater 1 9 Comparative Example 11 No Means Coating Liquid 11 Coater 1 8 Comparative Example 12 No Means Coating Liquid 1, 2 Coater 2 9 Comparative Example 13 Means No Coating Liquid 1,3 Coater 2 8 Comparative Example 14 Means No Coating Liquid 1,5 Coater 2 8 Comparative Example 15 Means No Coating Liquid 7,9 Coater 2 11 Comparative Example 16 Means No Coating Liquid 8,10 Coater 2 10 Comparative Example 17 Means No Coating Liquid 1,5 Coater 3 9 Comparative Example 18 Means No Coating Liquid 7,9 Coater 3 11 Comparative Example 19 Means 10 Coating Liquid 1 Coater 1 7 Ratio Comparative Example 20 Means 11 Coating liquid 1 Coater 16 As described above, by using the coating apparatus of the present invention, the fluctuation of the film thickness was significantly reduced and the uniformity of the coating film thickness was improved.

[0064]

According to the present invention, even if the support is unevenly deformed in the width direction or the transport direction, neither uneven coating film thickness nor coating omission occurs, and the product yield is improved and the tension is low. It enables transportation, reduces the cost of transportation equipment and reduces scratches on the support, and further supports any support,
An extrusion type coating device and coating method have been established to widen the range of applicable products and reduce the amount of product defects.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an arrangement of an extrusion type coater and a support roll with respect to a support and a structure of the support roll.

FIG. 2 is a side sectional view showing an example of an extrusion type coater for single layer coating.

FIG. 3 is a side sectional view showing an example of an extrusion type coater for multilayer coating.

FIG. 4 is a side sectional view showing an example of an extrusion type coater for multilayer coating.

FIG. 5 is a side sectional view showing an example of the arrangement of the extrusion type coater, the support rolls, and the hot air heating means with respect to the support.

FIG. 6 is a side sectional view showing an example of an arrangement of an extrusion type coater, a support roll and a heating roll heating means with respect to a support.

FIG. 7 is a side sectional view showing an example of the arrangement of the extrusion type coater and the support roll with respect to the support.

FIG. 8 is a plan view showing the disorder of the coating end portion when the both ends in the width direction of the support are deformed.

FIG. 9 is a plan view showing a state in which coating is performed by using a support body deformation removing unit when both ends of the support body in the width direction are deformed.

FIG. 10 is a perspective view of a drum roll.

[Explanation of symbols]

1,10 Front edge 2,20 Back edge 3,6,7,8,9 Slit 4,5 Chamber 41 Heating chamber 42 Hot air outlet 45 Heating roll 50,50A, 50B, 50C Extrusion type coater 61,62 Guide roll 70 Support Roll Mechanism 71 Support Roll 72 Piston Frame 73 Cylinder 74 Spring 75 Frame 76 Rotating Shaft 77 Swing Lever 78 Fixed Shaft 79 Spring

Claims (9)

[Claims] 1. A coating device for coating a continuously transported support by using an extrusion type coater, and pressing the support in a predetermined direction in the vicinity of the extrusion type coater. A coating device, characterized in that a member is provided. 2. The coating apparatus according to claim 1, wherein the pressing member is a heating unit provided upstream of the extrusion type coater in the transport direction. 3. The coating apparatus according to claim 2, wherein the heating unit is a blowing unit that blows warm air having a temperature equal to or higher than the glass transition point Tg of the support. 4. The coating apparatus according to claim 2, wherein the heating means is a heat roll having a temperature equal to or higher than a glass transition point Tg of the support. 5. The pressing means is a roller that rotates with the conveyance of the support body, and the roller is rotatably provided with at least the conveyance direction of the support body as a rotation axis and is elastic. 5. The coating apparatus according to claim 1, 2 or 4, wherein the coating apparatus is supported in a static manner. 6. A detection means for measuring a deformation amount of an end portion in the width direction of the support body, and a roller which rotates as the support body is conveyed, which is the pressing means, and at least the support body. A roller that is rotatably provided with the conveyance direction of the roller as a rotation axis, a moving unit that moves the roller in at least the thickness direction of the support, and a control that drives the moving unit according to the deformation amount. Means, and the coating device according to claim 1, 2, 4 or 5. 7. The roller comprises, from the coater's perspective, three points, namely, an upstream side and a coater side in the conveyance direction, an upstream side in the conveyance direction and an anti-coater side, and a downstream side in the conveyance direction and an anti-coater side.
The coating apparatus according to claim 5 or 6, wherein the coating apparatus is provided at least at one place. 8. The coating apparatus according to claim 4, 5 or 6, wherein the pressing member is a roller pair that nips the support. 9. The pressing member according to claim 1, wherein the pressing member is provided so as to press an end portion in the width direction of the support body in a predetermined direction. Coating equipment.