JP7066136B2 - Liquid coating device - Google Patents

Description

The present invention relates to a liquid coating apparatus.

A liquid coating device provided with a roll for coating a liquid on a long substrate is known (Patent Documents 1 to 3).

Japanese Unexamined Patent Publication No. 5-220847 Japanese Unexamined Patent Publication No. 2014-188410 Japanese Unexamined Patent Publication No. 2000-24565

When applying a liquid to a long substrate, it may be required to form non-liquid coated portions at both ends of the elongated substrate.

An object of the present invention is to suppress damage to a long base material and a long base material separating member capable of applying a liquid to a long base material while forming a non-coated portion at an end portion of the long base material. It is to provide a coating device.

The present invention includes the following aspects [1] to [9].
[1] A transporting means for transporting a long base material in the length direction, and
A gravure roll for applying a liquid to the surface of the long base material,
Equipped with
The width of the gravure roll is wider than the width of liquid application to a long substrate.
In order to separate the end portion of the long base material from the gravure roll while contacting the end portion of the long base material to be conveyed between the long base material and the gravure roll at each of both ends in the width direction of the long base material. Is provided with a long base material separating member,
The static friction coefficient μ _s of the long base material separating member with respect to the cycloolefin polymer (COP) base material on the contact surface of the long base material in contact with the long base material is 0.35 or less, and the arithmetic average roughness of the surface roughness. A liquid coating apparatus having Ra of 0.22 μm or less and a maximum surface roughness Rz of 2.2 μm or less.
[2] The liquid coating apparatus according to [1], wherein the arithmetic average roughness Ra of the surface roughness of the long substrate contact surface is 0.21 μm or less.
[3] The liquid coating apparatus according to [1] or [2], wherein the maximum height Rz of the surface roughness of the long substrate contact surface is 2 μm or less.
[4] 2. The liquid coating device according to any one.
[5] The length base material separating member is at least one on each of the upstream side and the downstream side in the transport direction of the long base material with respect to the rotation axis of the gravure roll at both ends in the width direction of the long base material. The liquid coating device according to any one of [1] to [4] provided.
[6] The liquid coating device according to any one of [1] to [5], wherein the long base material separating member is movable in the width direction of the long base material.
[7] The liquid coating device according to any one of [1] to [6], wherein the long base material separating member has a wedge-shaped cross section when viewed from the transport direction.
[8] The width of contact between the long base material separating member and the long base material is 1 mm or more and 20 mm or less in the transport direction of the long base material, according to any one of [1] to [7]. Liquid coating device.
[9] The width of contact between the long base material separating member and the long base material is 1 mm or more and 100 mm or less in the width direction of the long base material, according to any one of [1] to [8]. Liquid coating device.

According to the present invention, it is possible to apply a liquid to a long base material while forming liquid non-applied portions at both ends of the long base material, and damage to the liquid non-applied portions at both ends of the long base material. It is possible to provide a coating device in which the amount is suppressed.

It is the schematic sectional drawing seen from the transport direction of the long base material which shows an example of the liquid coating apparatus of this invention. It is the schematic sectional drawing seen from the width direction of the long base material which shows an example of the liquid coating apparatus of this invention. It is a schematic diagram which shows an example of a long base material separating member. It is a schematic diagram which shows an example of the manufacturing apparatus of the laminated body which includes the liquid coating apparatus of this invention. It is a schematic diagram which shows the liquid coating apparatus used in an Example.

(Liquid coating device)
The liquid coating apparatus of the present invention will be described below with reference to the drawings.

1 and 2 schematically show a liquid coating device according to an aspect of the present invention. In FIG. 1, the arcuate broken line arrow indicates the rotation direction of the roll, and the arrow 110 indicates the transport direction of the long base material. The liquid coating device 101 includes a guide roll 103 as a part of a transporting means for transporting the long base material 102 in the length direction, and a gravure roll 104 for applying the liquid 106 to the surface of the long base material 102. And the liquid supply circulation means 105, and a backup roll 107 for bringing the long base material 102 into contact with the gravure roll 104. Further, the liquid coating device 101 touches the ends of the long base material 102 to be conveyed between the long base material 102 and the gravure roll 104 at both ends of the long base material 102. A long base material separating member 108 is provided to separate the long base material from the gravure roll, and the long base material is separated at each of both ends in the width direction of the long base material 102 (hereinafter, also referred to as the long base material width direction). Two or more members 108 are provided at different positions in the transport direction of the long base material. The liquid coating device 101 is shown in FIG. 1 as a reverse gravure coating method in which the gravure roll 104 is rotated in a direction opposite to the transport direction of the long base material 102 (hereinafter, also referred to as the long base material transport direction). , The coating method may be used in which the gravure roll 104 is rotated in the positive direction in the direction of transporting the long base material.

The long base material 102 may be, for example, a resin film, a resin sheet, a resin plate, a glass sheet, a glass plate, or the like. Of these, a resin film is preferable. The resin film may be a long resin film or a sheet-fed resin film. As shown in FIG. 1, the resin film is preferably a long resin film in that it can be continuously applied. Further, the resin film may be a single layer or a multilayer film in which a plurality of resin films are laminated.

Examples of the resin constituting the resin film include thermoplastic resins and the like. Above all, it is preferably a translucent thermoplastic resin, and more preferably a film composed of an optically transparent thermoplastic resin. Examples of the thermoplastic resin include cellulose-based resins such as triacetyl cellulose and diacetyl cellulose; polyolefin-based resins such as chain polyolefin-based resins (polypropylene-based resins and the like) and cycloolefin-based resins (norbornen-based resins and the like); polyethylene. It may be a polyester resin such as terephthalate or polybutylene terephthalate; a polycarbonate resin; a (meth) acrylic resin such as a methyl methacrylate resin or the like. The resin film may be, for example, a polystyrene resin; a polyvinyl chloride resin; an acrylonitrile / butadiene / styrene resin; an acrylonitrile / styrene resin; a polyvinyl acetate resin; a polyvinylidene chloride resin; a polyamide resin; a polyacetal resin. A film composed of a modified polyphenylene ether resin; a polysulfone resin; a polyethersulfone resin; a polyarylate resin; a polyamideimide resin; a polyimide resin or the like may be used. These resins can be used alone or in combination.

The thickness of the long base material 102 may be, for example, 1 μm or more and 1 mm or less, preferably 5 μm or more and 500 μm or less, more preferably 10 μm or more and 200 μm or less, and further preferably 20 μm or more and 100 μm or less. When the thickness of the long base material 102 is 1 μm or more and 1 mm or less, the long base material 102 tends to be difficult to break and the transport stability tends to be easily improved.

The width of the long base material 102 may be, for example, 100 mm or more and 2000 mm or less, preferably 200 mm or more and 1800 mm or less, and more preferably 400 mm or more and 1500 mm or less.

In order to improve the adhesion between the long base material 102 and the liquid 106, the coated surface of the long base material 102 may be surface-treated prior to applying the liquid 106 to the long base material 102. Examples of the surface treatment include surface treatments such as corona discharge treatment, flame treatment, plasma treatment, ultraviolet treatment, primer coating treatment, and saponification treatment. Among them, corona discharge treatment and plasma treatment are preferable from the viewpoint that uniform treatment is possible, the apparatus is simple and the cost is low.

The transporting means 103 is a roll for transporting the long base material 102 in the length direction. The transporting means 103 may be, for example, a drive roll (for example, a nip roll, a suction roll, etc.), a guide roll (free roll), a winding device, a combination thereof, or the like.

The speed for transporting the long substrate 102 may be, for example, 1 m / min or more and 100 m / min or less, preferably 5 m / min or more and 50 m / min or less, and more preferably 15 m / min or more and 30 m / min or less.

The surface of the gravure roll 104 is engraved with irregularities, and when the surface of the gravure roll 104 comes into contact with the liquid 106 to be applied, the liquid 106 is stored in the recesses on the surface of the gravure roll 104, and the surface of the gravure roll 104 is excessive. After scraping off the liquid with the blade 109, the long base material 102 is pressed by the backup roll 107 while rotating, so that the liquid 106 accumulated in the recess of the gravure roll 104 is transferred to the long base material 102. The pressure for pressing the gravure roll 104 against the long base material 102 can be adjusted by the tension of the long base material 102 and the pressing depth of the backup roll 107 against the long base material 102.

The width of the gravure roll 104 (the length in the width direction of the long base material in the gravure roll 104) is wider than the width of the long base material 102 and the liquid application width to the long base material. The width of the gravure roll 104 may be, for example, 200 mm or more and 2500 mm or less, preferably 300 mm or more and 2200 mm or less, and more preferably 500 mm or more and 2000 mm or less.

The diameter of the gravure roll 104 may be, for example, 50 mm or more and 500 mm or less.

The coating amount of the liquid 106 of the gravure roll 104 may be, for example, 0.05 g / m ² or more and 12 g / m ² or less, preferably 0.2 g / m ² or more and 6 g / m ² or less, and more preferably 0.5 g. / M ² or more and 4 g / m ² or less. When the coating amount of the liquid 106 of the gravure roll 104 is 0.05 g / m ² or more and 12 g / m ² or less, coating unevenness due to liquid dripping or the like is unlikely to occur, and the coating film thickness of the target liquid 106 can be easily obtained. It tends to be. The coating amount can be adjusted by selecting the type of engraving of the gravure roll 104, the depth of unevenness, the number of rotations, the pressing pressure, and the like.

The rotation speed of the gravure roll 104 may be, for example, 1 rotation / minute or more and 100 rotations / minute or less, preferably 10 rotations / minute or more and 80 rotations / minute or less, and more preferably 15 rotations / minute or more and 60 rotations / minute or less. Is. When the rotation speed of the gravure roll 104 is 1 rotation / minute or more and 100 rotations / minute or less, it tends to be easy to uniformly apply the liquid 106 to the long base material 102.

The shape of the unevenness to be engraved on the surface of the gravure roll 104 may be, for example, a lattice type, a honeycomb type, a diagonal line type, or the like. The width and depth of the uneven portion may be, for example, 1 μm or more and 3 mm or less.

The liquid coating device 101 includes a liquid supply circulation means 105. The liquid supply and circulation means 105 supplies the liquid 106 to the surface of the gravure roll 104 while circulating the liquid 106 from the direction of arrow 111 to the direction of arrow 112. The liquid supply / circulation means 105 is preferably a closed type in order to prevent the liquid 106 itself or the volatile components contained therein from being vaporized and foreign matter from being mixed into the liquid 106.

The liquid 106 is not particularly limited as long as it is a gravure-coatable solution, a dispersion, or the like, and is, for example, a composition containing an active energy ray-curable compound (hereinafter, also referred to as an active energy ray-curable composition). good. The active energy ray-curable composition can be cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. The active energy ray-curable composition can be used, for example, as an adhesive, an ink, a primer, a material for forming a hard coat, a material for forming a polarizing film, and the like.

According to the liquid coating apparatus of the present invention, since the non-coated portion is formed at the end portion in the width direction of the long substrate, the elongated substrate 102 coated with the liquid 106 is further lengthened in the subsequent laminating step. Even when the substrate is bonded to the base material using, for example, a nip roll or the like to form a laminated body, the applied liquid tends to be difficult to squeeze out from the bonded long base material. Therefore, the liquid coating apparatus of the present invention is suitable for coating, for example, an adhesive used for manufacturing a laminate.

The viscosity of the liquid 106 may be, for example, 10 mPa · s or more and 200 mPa · s or less, preferably 20 mPa · s or more and 150 mPa · s or less, and more preferably 30 mPa · s or more and 120 mPa · s or less. When the viscosity of the liquid 106 is 10 mPa · s or more and 200 mPa · s or less, the coating film thickness tends to be easily adjusted.

The backup roll 107 is movable in any direction of the arrow 113, and for example, the position of the backup roll 107 can be adjusted to obtain a desired coating film thickness.

The coating film thickness of the liquid 106 may be, for example, 0.1 μm or more and 10 μm or less, preferably 0.2 μm or more and 5 μm or less, and more preferably 0.5 μm or more and 3 μm or less.

The width of the backup roll 107 can be wider than the width of the long base material 102. When the width of the backup roll 107 is wider than the width of the long base material 102, the pressing pressure of the gravure roll 104 tends to be evenly applied to the long base material 102, and the coating film thickness uniformity and transfer stability tend to be applied. Tends to be easy to improve. The width of the backup roll 107 may be, for example, 200 mm or more and 2500 mm or less, preferably 300 mm or more and 2200 mm or less, and more preferably 500 mm or more and 2000 mm or less.

The diameter of the backup roll 107 may be, for example, 50 mm or more and 500 mm or less.

The long base material separating member 108 contacts the end portions of the long base material 102 to be conveyed between the long base material 102 and the gravure roll 104 at both ends in the width direction of the long base material. It is provided as follows. As a result, the end portion of the long base material 102 does not come into contact with the gravure roll, and it is possible to apply the liquid 106 to the long base material 102 while forming a non-applied portion at the end portion of the long base material 102. Become.

The long base material separating member 108 is provided at each of both ends in the width direction of the long base material. In FIG. 1, two long base material separating members 108 are provided at different positions in the long base material transport direction for each end portion. The long base material separating member 108 is long from the viewpoint of improving the stability of the liquid coating width of the long base material 102 and facilitating meandering transport and damage to the long base material and the long base material separating member. Two or more, three or more, or four or more may be provided at different positions in the scale substrate transport direction.

The long base material separating member 108 may be separated from, for example, 5 mm or more and 50 mm or less, preferably 10 mm or more and 40 mm or less, and more preferably 15 mm or more and 30 mm or less with respect to the rotation axis of the gravure roll 104 in the long base material transport direction. You may be. When the long base material separating member 108 is separated by 5 mm or more and 50 mm or less with respect to the rotation axis of the gravure roll 104 in the long base material transport direction, the stability of the liquid coating width of the long base material 102 is likely to be improved. It tends to be.

When two or more long base material separating members 108 are provided at different positions in the long base material transport direction, the long base material separating member 108 provided at one end in the long base material width direction is long. It can be installed at a distance of, for example, 10 mm or more and 100 mm or less from another long base material separating member 108 provided in the substrate transport direction, preferably 20 mm or more and 80 mm or less, more preferably 30 mm or more and 60 mm or less. Install. When the long base material separating member 108 is installed at a distance of 10 mm or more and 100 mm or less from another long base material separating member 108 provided in the long base material transporting direction, the liquid application width of the long base material 102 Stability tends to improve easily. The long base material separating member 108 is preferably installed between the gravure roll 104 and the backup roll 107 in the long base material transport direction. The long base material separating member 108 provided at the other end can also be installed in the long base material transport direction in the same manner. The long base material separating members 108 provided at both ends of the long base material 102 are preferably provided at the same position in the transport direction.

When two or more long base material separating members 108 are provided at different positions in the long base material transport direction at both ends in the long base material width direction, the long base material separating member 108 is a long base material separating member 108. From the viewpoint that the stability of the liquid coating width of the material 102 is easily improved, the meandering transport, the damage of the long base material and the long base material separating member, and the bending of the long base material are easily suppressed, the long base material is preferable. One or more are provided on each of the upstream side and the downstream side with reference to the rotation axis of the gravure roll in the transport direction of the base material. When three or more long base material separating members 108 are installed in the long base material transport direction, two may be installed on the upstream side and one on the downstream side, one on the upstream side and two on the downstream side. You may. When four long base material separating members 108 are installed in the long base material transport direction, two may be installed on the upstream side, two may be installed on the downstream side, three may be installed on the upstream side, and one may be installed on the downstream side. You may install one on the upstream side and three on the downstream side.

The long base material separating member 108 is movable in the width direction of the long base material. It may be necessary to adjust the liquid coating width depending on the type of long base material, product specifications, meandering conditions at the initial stage of operation after passing paper, and the like. Therefore, when the long base material separating member 108 is movable in the long base material width direction, it tends to be easy to adjust the liquid coating width even during the coating operation. The long base material separating member 108 may be movable in the direction perpendicular to the long base material.

The width of the liquid non-applied portion may be, for example, 1 mm or more and 100 mm or less, preferably 3 mm or more and 80 mm or less, and more preferably 5 mm or more and 50 mm or less. The width of the liquid-non-applied portion can be changed, for example, depending on the type and application of the liquid 106 and the long base material 102 coated with the liquid 106, the type of treatment to be performed after application, and the like.

The shape of the long base material separating member 108 is not particularly limited as long as it has a surface that can come into contact with the long base material 102. For example, it may be a triangular pyramid, a square pyramid, etc.), a half-pyramid shape, a pyramid trapezoidal shape (for example, a triangular pyramid stand, a square pyramid stand, etc.), a cylindrical shape, a semi-cylindrical shape, a conical shape, a conical trapezoidal shape, a semi-conical shape, or the like. When the shape of the long base material separating member is a cylinder or a cone, the long base material separating member 108 may be a free roll. The long base material separating member 108 preferably has a wedge-shaped cross section when viewed from the transport direction.

The long base material separating member 108 may be made of, for example, metal, plastic, paper, or the like, and is preferably made of metal. Examples of metals include, for example, stainless steel, iron, aluminum and the like.

In FIG. 2, a wedge-shaped long base material separating member 108 is installed. The long base material separating member 108 is a long base material contact surface 201 that contacts the long base material 102 at both ends of the long base material 102 so that the ends of the long base material 102 are separated from the gravure roll 104. Is installed so as to incline.

The coefficient of static friction _μs of the long substrate contact surface 201 with respect to the cycloolefin polymer (COP) substrate is 0.35 or less, preferably 0.32 or less. When the static friction coefficient _μs of the long base material contact surface 201 with respect to the cycloolefin polymer (COP) base material is 0.35 or less, the slipperiness of the long base material 102 on the long base material contact surface 201 is improved. , There is a tendency that damage to the long base material and the long base material separating member is easily suppressed. On the other hand, the coefficient of static friction _μs of the long substrate contact surface 201 with respect to the cycloolefin polymer (COP) substrate is usually 0 or more, and may be, for example, 0.001 or more, 0.005 or more, or 0.01 or more. .. The coefficient of static friction _μs with respect to the cycloolefin polymer (COP) substrate can be measured according to the method described in Examples described later.

The arithmetic average roughness Ra of the surface roughness of the long substrate contact surface 201 is 0.22 μm or less, preferably 0.21 μm or less, more preferably 0.15 μm or less, and particularly preferably 0.1 μm or less. .. When the arithmetic average roughness Ra of the surface roughness of the long base material contact surface 201 is 0.22 μm or less, the long base material and the long base material separating member are damaged on the long base material contact surface 201. It tends to be difficult. The arithmetic average roughness Ra of the surface roughness of the long substrate contact surface 201 is usually 0 μm or more, and may be, for example, 0.001 μm or more, 0.005 μm or more, or 0.01 μm or more. The arithmetic mean roughness Ra of the surface roughness can be measured according to the method described in Examples described later.

The maximum height Rz of the surface roughness of the long substrate contact surface 201 is 2.2 μm or less, preferably 2 μm or less, more preferably 1.8 μm or less, and particularly preferably 1.6 μm or less. When the maximum height Rz of the surface roughness of the long base material contact surface 201 is 2.2 μm or less, damage to the long base material and the long base material separating member on the long base material contact surface 201 is unlikely to occur. It tends to be. The maximum height Rz of the surface roughness of the long substrate contact surface 201 is usually 0 μm or more, and may be, for example, 0.1 μm or more, 0.2 μm or more, or 0.4 μm or more. The maximum height Rz of the surface roughness can be measured according to the method described in Examples described later.

In the long base material separating member 108, for example, the long base material contact surface 201 is polished to have the above-mentioned static friction coefficient μ _s , maximum height Rz, and arithmetic average roughness Ra. , A surface treatment such as a ceramic coating or a fluororesin coating may be applied, or a fluororesin tape, an ultra-high molecular weight polyethylene tape or the like may be attached. The long base material separating member 108 is subjected to the above treatment over a surface other than the long base material contact surface 201, for example, a surface adjacent to the long base material contact surface 201, or the entire surface of the long base material separating member 108. It may be attached or a tape or the like may be attached.

In order to separate the end portion of the long base material 102 from the gravure roll 104, the long base material separating member 108 is installed so that the long base material contact surface 201 is inclined with respect to the long base material coating surface 202. Can be done. The inclination angle 203 of the long base material separating member 108 may be, for example, 1 degree or more and 20 degrees or less, preferably 2 degrees or more and 15 degrees or less, and more preferably 3 degrees or more and 10 degrees or less. When the inclination angle 203 is 1 degree or more and 20 degrees or less, the long base material 102 is prevented from bending, and the transport stability of the long base material 102 tends to be improved.

The width of contact between the long base material separating member 108 and the long base material 102 may be, for example, 1 mm or more and 20 mm or less, preferably 1.5 mm or more and 15 mm or less, and more preferably 2 mm in the length base material transport direction. It is 10 mm or less. When the width of contact between the long base material separating member 108 and the long base material 102 in the long base material transport direction is 1 mm or more and 20 mm or less, the long base material and the long base material separating member are less likely to be damaged. There is a tendency.

The width of contact between the long base material separating member 108 and the long base material 102 may be, for example, 1 mm or more and 100 mm or less in the long base material width direction, preferably 3 mm or more and 80 mm or less, and more preferably 5 mm or more and 50 mm or less. Is. When the width of contact between the long base material separating member 108 and the long base material 102 in the long base material transport direction is 1 mm or more and 100 mm or less, fluttering at the end of the long base material 102 during transportation is suppressed. Therefore, it becomes easy to precisely adjust the transport position, and it tends to be difficult to limit the types of long base materials to be transported.

The liquid coating width 204 on the long substrate may be, for example, 100 mm or more and 2000 mm or less, preferably 200 mm or more and 1800 mm or less, and more preferably 400 mm or more and 1500 mm or less. When the liquid coating width 204 on the long substrate is 100 mm or more and 2000 mm or less, the width of the non-coated portion tends to be easily controlled.

The wedge-shaped long base material separating member will be described below with reference to FIG. The wedge-shaped long base material separating member 108 is installed while being supported by the support member 205 so that the long base material 102 and the surface 201 come into contact with each other at two positions different from each other in the long base material transport direction. .. The long base material separating member 108 may be integrally formed with the support member 205.

The length base material separating member 108 may have a dimension 206 of, for example, 1 mm or more and 20 mm or less in the long base material transport direction, preferably 1.5 mm or more and 15 mm or less, and more preferably 2 mm or more and 10 mm or less. When the dimension 206 in the transport direction of the long base material is 1 mm or more and 20 mm or less, the long base material and the long base material separating member tend to be less likely to be damaged, and the long base material 102 and the gravure roll 104 The interval becomes appropriate, and it tends to be easy to fine-tune the pressing amount of the gravure roll, and since the long base material separating member 108 does not become too large, it tends to be easy to save space at the installation location. ..

The length base material separating member 108 may have a dimension 207 in the width direction of the long base material, for example, 1 mm or more and 500 mm or less, preferably 5 mm or more and 400 mm or less, and more preferably 10 mm or more and 300 mm or less. When the dimension 207 in the width direction of the long base material is 1 mm or more and 500 mm or less, it becomes easy to form a liquid non-applied portion on the long base material 102, and the transport stability of the long base material 102 tends to be excellent.

The long base material separating member 108 may have an inclination angle 208 of the long base material contact surface 201 with respect to the facing surface thereof, for example, 1 degree or more and 20 degrees or less, preferably 2 degrees or more and 15 degrees or less, more preferably. It is 3 degrees or more and 10 degrees or less. When the inclination angle 208 is 1 degree or more and 20 degrees or less, it becomes easy to separate the end portion from the gravure roll while contacting the end portion of the long base material to be conveyed, and the bending of the long base material 102 is prevented. The transport stability of the long base material 102 is likely to be improved.

The tip dimension 209 between the long base material contact surface 201 of the long base material separating member 108 and the facing surface thereof is not particularly limited, and may be, for example, 1 mm or more and 20 mm or less.

(Laminate manufacturing equipment)
FIG. 4 shows a laminate manufacturing apparatus 301 provided with a liquid coating apparatus 101. The laminate manufacturing apparatus 301 includes a long resin film 302 unwinding portion 303, a long resin film 304 unwinding portion 305, a backup roll 107, a long base material separating member 108, a gravure roll 104, and a liquid supply circulation. The means 105, the nip roll 306, the UV irradiation device 307, and the guide roll 308 are provided. The active energy ray-curable composition is applied to the resin film 302 by the liquid coating device 101 to form a long base material with a coating film 309, which is then passed through between the nip rolls 306 together with the resin film 304 and bonded, and then UV-irradiated. The active energy ray-curable composition is cured by the apparatus 307 to obtain a laminate 310.

According to the liquid coating apparatus of the present invention, since a non-coated portion is formed at the end portion of the long base material, the long base material coated with the liquid is combined with a further long base material in a subsequent bonding step, for example. Even when bonded using a nip roll or the like, the applied liquid does not easily protrude from the bonded long base material, resulting in variations in the coating width, meandering transport, damage to the long base material and the long base material separating member, etc. Since it is unlikely to occur, it is suitable as a liquid coating device for a laminated body manufacturing device.

(Liquid application method)
Another aspect of the present invention is a method of applying a liquid to a long base material (hereinafter, also referred to as a coating method) while forming a non-coated portion at the end of the long base material, and the long base material is used. The transport step includes a transport step in which the long base material and the gravure roll are brought into contact with each other by a backup roll, and a liquid is applied to the surface of the long base material by the gravure roll. It is a method of separating both ends of the above from the gravure roll at at least two different positions in the long substrate transport direction.

As the long base material, the liquid, the gravure roll, and the backup roll in the coating method, those exemplified in the above-mentioned liquid coating apparatus are applied.

In the coating step, the method of separating both ends of the long base material from the gravure roll at two different positions in the long base material transport direction is a method using the long base material separating member exemplified in the above-mentioned liquid coating device. May be. As examples of the long base material separating member, the installation position, the number of installations, etc., those exemplified in the above-mentioned liquid coating device are applied.

The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these examples.

[Slipperiness]
The static friction coefficient _μs with respect to the surface of the long substrate separating member used in each Example and Comparative Example and the cycloolefin polymer (COP) substrate was measured. The static friction coefficient μs was measured using a portable friction meter (Muse TYPE: _94i -II manufactured by Shinto Kagaku Co., Ltd.).

[Scratch property]
The surface of the long substrate separating member used in each Example and Comparative Example was rubbed against a cellulose triacetate (TAC) film (thickness 80 μm, length 40 mm × width 70 mm). Then, the surface of the long substrate separating member and the surface of the cellulose triacetate (TAC) film were visually observed and observed with a microscope. The case of no damage is indicated by ○, the case of damage but acceptable is indicated by Δ, and the case of damage is indicated by ×.
Further, for the surface of the long base material separating member used in each Example and Comparative Example, the arithmetic average roughness Ra and the maximum height Rz of the surface roughness are measured by a surface roughness meter (Surfcom 130A, Tokyo Seimitsu Co., Ltd.). It was measured using JIS2001 standard).

[Long base material separating member A]
SUS304 long base material separating member shown in FIG.

[First film]
Cellulose triacetate (TAC) film, thickness: 80 μm

[Second film]
Cellulose triacetate (TAC) film, thickness: 80 μm

[Active energy ray-curable composition 1]
Epoxy resin-based UV curable adhesive (viscosity 40 mPa · s)

[Example 1]
Evaluation of slipperiness and scratch resistance of the long base material separating member 1 to which an ultra high molecular weight polyethylene tape (ultra high molecular weight polyethylene tape manufactured by Nitto Denko Corporation, product number: No. 4430) is attached to the surface of the long base material separating member A. bottom. The results are shown in Table 1.

[Example 2]
Instead of attaching the ultra-high molecular weight polyethylene tape to the surface of the long base material separating member A in Example 1, a ceramic coating treatment (ZACROM treatment of Tocalo Co., Ltd.) was applied to the entire surface of the long base material separating member A. The slipperiness and scratchability were evaluated in the same manner as in Example 1 except that the long base material separating member 2 was used. The results are shown in Table 1.

[Example 3]
Instead of attaching the ultra-high molecular weight polyethylene tape to the surface of the long base material separating member A in Example 1, a hard non-adhesive coating treatment is applied to the entire surface of the long base material separating member A (Nippon Fluorine Industry Co., Ltd.). The slipperiness and scratchability were evaluated in the same manner as in Example 1 except that the long base material separating member 3 subjected to the Aμcot treatment of the company was used. The results are shown in Table 1.

[Comparative Example 1]
In Example 1, the slipperiness is the same as in Example 1 except that the long base material separating member A is used as it is instead of the ultra-high molecular weight polyethylene tape being attached to the surface of the long base material separating member A. And scratchability was evaluated. The results are shown in Table 1.

[Example 4]
As shown in FIG. 5, at each of both ends of the long base material in the width direction of the liquid coating device 101, the long base material separating member 108 is placed between the gravure roll 104 and the backup roll 107, and the rotation axis of the gravure roll 104. One was installed at a position 30 mm away from the upstream side in the long base material transport direction and one at a position 30 mm away from the long base material transport direction downstream side. The surface of the long base material separating member 108 was coated with the ultra-high molecular weight polyethylene tape of Example 1. The width of the contact surface between the long base material separating member 1 and the long base material is 6 mm in the long base material transport direction, 15 mm in the long base material width direction, and the long base material of the long base material separating member 1. The angle between the contact surface and the gravure roll contact surface was set to 6 degrees.
As described above, in the laminate manufacturing apparatus provided with the liquid coating device in which the long base material separating member 108 is arranged, the long second film is continuously conveyed and the long first film is continuously conveyed. , The active energy ray-curable composition 1 is applied on the first film, and the gravure roll is applied at a thickness of about 1.5 μm without forming a curable composition layer in the region 15 mm from the end in the width direction of the first film. After coating with, it was passed between the bonding rolls. Then, the curable composition layer was subsequently cured by irradiation with ultraviolet rays to obtain a laminate composed of a first film / a cured layer / a second film.
No damage to the long base material and the long base material separating member was confirmed. In addition, variations in the liquid application width to the long base material, meandering transport, bending of the long base material, and protrusion of the active energy ray-curable composition 1 from the laminate were not observed.

[Comparative Example 2]
In Example 4, the same applies to Example 4 except that the long base material separating member 108 is used as it is in SUS304 instead of the ultra-high molecular weight polyethylene tape being attached to the surface of the long base material separating member 108. The laminate was manufactured. Damage was confirmed on the outside of the first film of the obtained laminate.

101 liquid coating device, 102 long base material, 103 transport means , 104 gravure roll, 105 liquid supply circulation mechanism, 106 liquid, 107 backup roll, 108 long base material separating member , 109 blade, 201 long base material contact surface. , 202 Long substrate coated surface, 203 tilt angle, 204 liquid coating width on long substrate, 205 support member, 206 dimensions in long substrate transport direction, 207 dimensions in long substrate width direction, 208 tilt Square, 209 tip dimensions, 301 laminate manufacturing equipment, 302 resin film, 303 unwinding part, 304 resin film, 305 unwinding part, 306 nip roll, 307 UV irradiation device, 308 guide roll, 309 long base with coating Material, 310 laminate

Claims (9)

A transport means for transporting a long base material in the length direction, and
A gravure roll for applying a liquid to the surface of the long base material,
Equipped with
The width of the gravure roll is wider than the width of liquid application to a long substrate.
In order to separate the end portion of the long base material from the gravure roll while contacting the end portion of the long base material to be conveyed between the long base material and the gravure roll at each of both ends in the width direction of the long base material. Is provided with a long base material separating member,
The static friction coefficient μ _s of the long base material separating member with respect to the cycloolefin polymer (COP) base material on the contact surface of the long base material in contact with the long base material is 0.35 or less, and the arithmetic average roughness of the surface roughness. A liquid coating apparatus having Ra of 0.22 μm or less and a maximum surface roughness Rz of 2.2 μm or less. The liquid coating apparatus according to claim 1, wherein the arithmetic average roughness Ra of the surface roughness of the long substrate contact surface is 0.21 μm or less. The liquid coating apparatus according to claim 1 or 2, wherein the maximum height Rz of the surface roughness of the long substrate contact surface is 2 μm or less. The item according to any one of claims 1 to 3, wherein two or more of the long base material separating members are provided at different positions in the transport direction of the long base material at both ends in the width direction of the long base material. The liquid coating device described. At both ends of the long base material in the width direction, one or more of the long base material separating members are provided on each of the upstream side and the downstream side in the transport direction of the long base material with reference to the rotation axis of the gravure roll. The liquid coating apparatus according to any one of claims 1 to 4. The liquid coating device according to any one of claims 1 to 5, wherein the long base material separating member is movable in the width direction of the long base material. The liquid coating device according to any one of claims 1 to 6, wherein the long base material separating member has a wedge-shaped cross section when viewed from the transport direction. The liquid coating apparatus according to any one of claims 1 to 7, wherein the width of contact between the long base material separating member and the long base material is 1 mm or more and 20 mm or less in the transport direction of the long base material. .. The liquid coating apparatus according to any one of claims 1 to 8, wherein the width of contact between the long base material separating member and the long base material is 1 mm or more and 100 mm or less in the width direction of the long base material. ..

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