JP2020000961A - Liquid application device - Google Patents

Abstract

To provide an application device that can suppress a lengthy base material and a lengthy base material separating member from being broken, which can apply liquid to the lengthy base material while forming non-coated parts in end parts of the lengthy base material.SOLUTION: A liquid application device 101 comprises conveying means for conveying a lengthy base material 102 in a length direction and a gravure roll 104 for applying liquid 106 to a surface of the lengthy base material. A width of the gravure roll is wider than a width 204 of liquid application to the lengthy base material. Lengthy base material separating members that separate end parts of the lengthy base material to be conveyed from the gravure roll while contacting the end parts are provided between the lengthy base material and the gravure roll, in both end parts respectively in a width direction of the lengthy base material, where a coefficient μof static friction of a lengthy base material contact surface 201 which contacts the lengthy base material, of the lengthy base material separating member to a cycloolefin polymer base material is below 0.35, arithmetic average roughness Ra of surface roughness is below 0.22 μm and the maximum height Rz of the surface roughness is below 2.2 μm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a liquid application device.

  2. Description of the Related Art There are known liquid applying apparatuses including a roll for applying a liquid to a long base material (Patent Documents 1 to 3).

JP-A-5-220847 JP 2014-188410 A JP-A-2000-24565

  When applying a liquid to a long base material, it may be required to form liquid non-applied portions at both ends of the long base material.

  An object of the present invention is to be able to apply a liquid to a long base material while forming a non-applied portion at the end of the long base material, thereby suppressing damage to the long base material and the long base material separating member. It is to provide a coating device.

The present invention includes the following aspects [1] to [9].
[1] conveying means for conveying the long base material in the length direction,
A gravure roll for applying a liquid to the surface of the long base material,
With
The width of the gravure roll is wider than the width of the liquid applied to the long base material,
In each of both ends in the width direction of the long base material, between the long base material and the gravure roll, to separate the end from the gravure roll while contacting the end of the long base material being conveyed A long base material separating member is provided,
The coefficient of static friction μ _s of the long base member separating member with respect to the cycloolefin polymer (COP) base on the long base contact surface that comes into contact with the long base is 0.35 or less, and the arithmetic average roughness of the surface roughness A liquid coating apparatus, wherein Ra is 0.22 μm or less, and maximum surface roughness height Rz is 2.2 μm or less.
[2] The liquid coating apparatus according to [1], wherein an arithmetic average roughness Ra of a surface roughness of the long base material contact surface is 0.21 μm or less.
[3] The liquid coating device according to [1] or [2], wherein the maximum height Rz of the surface roughness of the long base material contact surface is 2 μm or less.
[4] The long base material separating member is provided at two or more positions at different positions in the transport direction of the long base material at each of both ends in the width direction of the long base material, [1] to [3]. The liquid application device according to any one of the above.
[5] The long base material separating member has, at both ends in the width direction of the long base material, one or more at each of the upstream side and the downstream side in the transport direction of the long base material based on the rotation axis of the gravure roll. The liquid application device according to any one of [1] to [4], which is provided.
[6] The liquid application device according to any one of [1] to [5], wherein the long base material separating member is movable in a width direction of the long base material.
[7] The liquid application 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 according to any one of [1] to [7], wherein the width of the 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. Liquid coating device.
[9] The width according to any one of [1] to [8], wherein a width of the contact between the long base material separating member and the long base material is 1 mm or more and 100 mm or less in a width direction of the long base material. Liquid coating device.

  According to the present invention, it is possible to apply a liquid to a long base material while forming a liquid non-application portion at both ends of the long base material. Can be provided.

FIG. 1 is a schematic cross-sectional view showing an example of a liquid coating apparatus according to the present invention, as viewed from a transport direction of a long base material. FIG. 1 is a schematic cross-sectional view of an example of a liquid coating apparatus of the present invention, as viewed from a width direction of a long base material. It is the schematic which shows an example of a long base material separation member. It is the schematic which shows an example of the manufacturing apparatus of the laminated body provided with the liquid application device of this invention. It is the schematic which shows the liquid application device used for the Example.

(Liquid coating device)
Hereinafter, a liquid application device of the present invention will be described with reference to the drawings.

  1 and 2 schematically show a liquid application apparatus according to one embodiment of the present invention. In FIG. 1, an arc-shaped broken line arrow indicates a rotation direction of the roll, and an arrow 110 indicates a transport direction of the long base material. The liquid coating apparatus 101 includes a guide roll 103 as a part of a transport unit for transporting the long base material 102 in a length direction, and a gravure roll 104 for applying a liquid 106 to the surface of the long base material 102. , A liquid supply circulation unit 105, and a backup roll 107 for bringing the long base material 102 into contact with the gravure roll 104. Further, the liquid coating apparatus 101 is configured to contact the end portion of the long base material conveyed between the long base material 102 and the gravure roll 104 at both end portions of the long base material 102 while contacting the end portion. A long base material separating member 108 for separating from the gravure roll is provided, and a long base material separation member 108 is provided 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. Although the liquid coating apparatus 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 a direction in which the long base material 102 is conveyed (hereinafter, also referred to as a long base material conveyance direction). Alternatively, a coating method in which the gravure roll 104 is rotated in the forward direction of the long substrate transport direction may be used.

  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. Among them, a resin film is preferable. The resin film may be a long resin film or a sheet-like resin film. As shown in FIG. 1, the resin film is preferably a long resin film in that it can be applied continuously. 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 a thermoplastic resin. Among them, a translucent thermoplastic resin is preferable, and a film composed of an optically transparent thermoplastic resin is more preferable. Examples of the thermoplastic resin include cellulosic resins such as triacetyl cellulose and diacetyl cellulose; polyolefin resins such as chain polyolefin resins (eg, polypropylene resins) and cycloolefin resins (eg, norbornene resins); polyethylene. Polyester resins such as terephthalate and polybutylene terephthalate; polycarbonate resins; (meth) acrylic resins such as methyl methacrylate resins, and 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 film composed of a modified polyphenylene ether resin; a polysulfone resin; a polyethersulfone resin; a polyarylate resin; a polyamideimide resin; 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 still more 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, there is a tendency that the long base material 102 is not easily broken and the transport stability is 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.

  Before applying the liquid 106 to the long base material 102, a surface treatment may be performed on the application surface of the long base material 102 in order to increase the adhesion between the long base material 102 and the liquid 106. 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 transport means 103 is a roll for transporting the long base material 102 in the length direction. The transport unit 103 may be, for example, a drive roll (for example, a nip roll, a suction roll, or the like), a guide roll (free roll), a winding device, or a combination thereof.

  The speed at which the long base material 102 is conveyed may be, for example, 1 m / min to 100 m / min, preferably 5 m / min to 50 m / min, and more preferably 15 m / min to 30 m / min.

  The gravure roll 104 has an uneven engraving on its surface. When the surface comes into contact with the liquid 106 to be applied, the liquid 106 accumulates in a concave portion on the surface of the gravure roll 104 and the excess of the surface of the gravure roll 104 After the liquid is scraped off by the blade 109, the long base material 102 is pressed by the backup roll 107 while rotating, so that the liquid 106 collected in the concave portion 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 width of the liquid applied 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, for example may be a 0.05 g / ^{m 2} or more 12 g / ^{m 2} or less, preferably 0.2 g / ^{m 2} or more 6 g / ^{m 2} or less, more preferably 0.5g / M ² or more and 4 g / m ² or less. If the coating amount of the liquid 106 of the gravure roll 104 is 0.05 g / ^{m 2} or more 12 g / ^{m 2} or less, uneven coating is less likely to occur due to dripping or the like, and easily obtained coating film thickness of the liquid 106 to the intended Tend to be. The amount of application 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 to 100 rotations / minute, preferably 10 rotations / minute to 80 rotations / minute, and more preferably 15 rotations / minute to 60 rotations / minute. It is. When the rotation speed of the gravure roll 104 is 1 rotation / minute or more and 100 rotations / minute or less, the liquid 106 tends to be easily applied uniformly to the long base material 102.

  The shape of the irregularities engraved on the surface of the gravure roll 104 may be, for example, a lattice type, a honeycomb type, an oblique 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 application device 101 includes a liquid supply circulation unit 105. The liquid supply 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 circulating means 105 is preferably a closed type in order to prevent the liquid 106 itself or 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 solution or dispersion liquid capable of gravure coating, 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-coating portion is formed at the end in the width direction of the long base material, the long base material 102 on which the liquid 106 has been applied is further elongated in the subsequent laminating step. Even when a laminated body is formed by laminating the base material using, for example, a nip roll or the like, the applied liquid tends to hardly protrude from the bonded long base material. Therefore, the liquid application device of the present invention is suitable for applying an adhesive used for manufacturing a laminate, for example.

  The liquid 106 may have a viscosity of, 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, there is a tendency that the coating film thickness is easily adjusted.

  The backup roll 107 has mobility in any direction of the arrow 113. For example, the position of the backup roll 107 can be adjusted to obtain a desired coating film thickness.

  The coating 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 made wider than the width of the long base material 102, the pressure for pressing the gravure roll 104 on the long base material 102 tends to be applied evenly, and the uniformity of the coating film thickness and the transport stability Tend to be improved. 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 comes into contact with the end of the long base material 102 conveyed between the long base material 102 and the gravure roll 104 at each of both ends in the long base material width direction. It is provided as follows. Thereby, the end 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-application portion at the end of the long base material 102. Become.

  The long base material separating member 108 is provided at each of both ends in the long base material width direction. In FIG. 1, two long base material separating members 108 are provided at different positions in the long base material transport direction at each end. From the viewpoint that the stability of the liquid application width of the elongate base material 102 is improved and the meandering conveyance and damage to the elongate base material and the elongate base material separation member are easily suppressed, Two or more or three or more or four or more may be provided at different positions in the length base material transport direction.

  The long base material separating member 108 may be separated from the rotation axis of the gravure roll 104 by, for example, 5 mm or more and 50 mm or less in the long base material transport direction, preferably 10 mm or more and 40 mm or less, more preferably 15 mm or more and 30 mm or less. May be. When the long base material separating member 108 is separated from the rotation axis of the gravure roll 104 by 5 mm or more and 50 mm or less in the long base material transport direction, the stability of the liquid application width of the long base material 102 is easily improved. Tend 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 an interval of, for example, 10 mm or more and 100 mm or less from another long substrate separating member 108 provided in the substrate transport direction, preferably at an interval of 20 mm or more and 80 mm or less, more preferably at an interval of 30 mm or more and 60 mm or less. Install. When the long base material separating member 108 is installed at an interval of 10 mm or more and 100 mm or less from another long base material separating member 108 provided in the long base material conveying direction, the liquid application width of the long base material 102 The stability tends to be improved. The long substrate separating member 108 is preferably installed between the gravure roll 104 and the backup roll 107 in the long substrate transport direction. The long substrate separating member 108 provided at the other end can also be installed in the long substrate 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 conveying direction at each of both ends in the long base material width direction, the long base material separating member 108 From the viewpoint that the stability of the liquid application width of the material 102 is easily improved, meandering conveyance, damage to the long base material and the long base material separating member, and bending of the long base material are easily suppressed. At least one is provided on each of the upstream side and the downstream side based on 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 provided in the long base material transport direction, two may be provided on the upstream side and one may be provided on the downstream side, or one may be provided on the upstream side and two may be provided on the downstream side. May be. 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 and two may be installed on the downstream side, and three may be installed on the upstream side and one may be installed on the downstream side. Or one on the upstream side and three on the downstream side.

  The long base material separating member 108 is movable in the long base material width direction. In some cases, it is necessary to adjust the liquid application width depending on the type of long base material, product specifications, meandering conditions in the initial operation after paper passing, and the like. Therefore, when the long base material separating member 108 is movable in the long base material width direction, the liquid coating width tends to be easily adjusted even during the coating operation. The long base material separating member 108 may be movable in a 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 according to, for example, the type and use of the liquid 106 and the long substrate 102 to which the liquid 106 has been applied, the type of processing 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, and is, for example, a prism (for example, a rectangular parallelepiped, a cube, a triangular prism, a quadrangular prism, or the like), a pyramid ( For example, the shape may be a triangular pyramid, a quadrangular pyramid, or the like, a half pyramid, a truncated pyramid (for example, a truncated triangular pyramid, a quadrangular pyramid, or the like), a cylindrical shape, a semicylindrical shape, a conical shape, a truncated cone shape, a semiconical shape, or the like. When the shape of the long base material separating member is cylindrical or conical, the long base material separating member 108 may be a free roll. It is preferable that the long base material separating member 108 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 the metal include, for example, stainless steel, iron, aluminum, and the like.

  In FIG. 2, a long base material separating member 108 having a wedge shape is provided. The long base material separating member 108 has a long base material contact surface 201 that is in contact with the long base material 102 at both ends of the long base material 102 such that the ends of the long base material 102 are separated from the gravure roll 104. Is installed to be inclined.

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, and preferably 0.32 or less. When the coefficient of static friction _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. In addition, damage to the long base material and the long base material separating member tends to be easily suppressed. On the other hand, the coefficient of static friction μ _s of the long base material contact surface 201 with respect to the cycloolefin polymer (COP) base material 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 for a cycloolefin polymer (COP) substrate can be measured according to a method described in Examples described later.

  The arithmetic average roughness Ra of the surface roughness of the long base material 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 separation member on the long base material contact surface 201 may be damaged. It tends to be difficult. The arithmetic average roughness Ra of the surface roughness of the long base material 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 average roughness Ra of the surface roughness can be measured according to a method described in Examples described later.

  The maximum height Rz of the surface roughness of the long base material 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, the long base material and the long base material separation member are less likely to be damaged on the long base material contact surface 201. Tend to be. The maximum height Rz of the surface roughness of the long base material 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 in accordance with a method described in Examples described later.

The long base material separating member 108 is, for example, polished on the long base material contact surface 201 in order to make the long base material contact surface 201 have the above-described static friction coefficient μ _s , maximum height Rz, and arithmetic average roughness Ra. Alternatively, a surface treatment such as ceramic coating or fluororesin coating may be performed, and a fluororesin tape, an ultrahigh molecular weight polyethylene tape, or the like may be applied. The above-described processing is performed on the surface other than the long base material contact surface 201, for example, the surface adjacent to the long base material contact surface 201, or the entire surface of the long base material separation member 108. 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 such that the long base material contact surface 201 is inclined with respect to the long base material application surface 202. Can be. 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, bending of the long base material 102 is prevented, and the transport stability of the long base material 102 tends to be improved.

  The width at which the long base material separating member 108 and the long base material 102 come into contact may be, 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, more preferably 2 mm or less. Not less than 10 mm. When the width in which the long base material separating member 108 and the long base material 102 contact 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 not easily damaged. There is a tendency.

  The width of the long base material separating member 108 and the long base material 102 in contact 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, more preferably 5 mm or more and 50 mm or less. It is. When the width of the long base material separating member 108 and the long base material 102 in the long base material conveyance direction that is in contact with the long base material 102 is 1 mm or more and 100 mm or less, fluttering of the end of the long base material 102 during conveyance is suppressed. This makes it easy to precisely adjust the transfer position, and tends to limit the type of long base material to be transferred.

  The liquid application width 204 to the long base material 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 application width 204 on the long base material is 100 mm or more and 2000 mm or less, the width of the non-application 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 are in contact with each other at two different positions in the long base material transport direction. . The long base material separating member 108 may be formed integrally with the support member 205.

  The long base material separating member 108 may have a dimension 206 in the long base material transport direction of, 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 or more and 10 mm or less. When the dimension 206 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 tend to be hardly damaged, and the long base material 102 and the gravure roll 104 The spacing becomes moderate, and the fine adjustment of the pressing amount of the gravure roll tends to be easily performed, and the long base material separating member 108 does not become too large, so that the installation location tends to be space-saving. .

  The length 207 of the long base material separating member 108 in the long base material width direction may be, 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 206 in the width direction of the long base material is 1 mm or more and 500 mm or less, it is 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.

  In the long base material separating member 108, the inclination angle 208 of the long base material contact surface 201 with respect to the opposite surface may be, 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 not less than 1 degree and not more than 20 degrees, the end portion is easily separated from the gravure roll while being in contact with the end portion of the conveyed long base material, and the long base material 102 is prevented from being bent, The transport stability of the long base material 102 is easily improved.

  The tip size 209 between the long base material contact surface 201 and the opposing surface of the long base material separating member 108 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 laminated body manufacturing apparatus 301 including the liquid application apparatus 101. The laminated body manufacturing apparatus 301 includes an unwinding section 303 of a long resin film 302, an unwinding section 305 of a long resin film 304, a backup roll 107, a long substrate separating member 108, a gravure roll 104, and a liquid supply circulation. It comprises a means 105, a nip roll 306, a UV irradiation device 307, and a guide roll 308. The active energy ray-curable composition is applied to the resin film 302 by the liquid application device 101 to form a long base material with a coating film 309, and then passes between the nip rolls 306 together with the resin film 304 and is bonded, followed by UV irradiation The active energy ray-curable composition is cured by the device 307, and the laminate 310 is obtained.

  According to the liquid coating apparatus of the present invention, since the non-coating portion is formed at the end of the long base material, the long base material coated with the liquid, in the subsequent laminating step, a further long base material, for example, Even in the case of bonding using a nip roll, etc., the applied liquid is unlikely to protrude from the bonded long base material, and variations in coating width and meandering conveyance, damage to the long base material and the long base material separating member, etc. Since it is unlikely to occur, it is suitable for a liquid application device for a laminate manufacturing device.

(Liquid application method)
Another embodiment according to the present invention is a method of applying a liquid to a long base material while forming a non-application portion at an end of the long base material (hereinafter, also referred to as an application method). A transporting step of transporting, and a coating step of contacting the long base material and the gravure roll with a backup roll and applying a liquid to the surface of the long base material with the gravure roll; Are separated from the gravure roll at at least two different positions in the long substrate transport direction.

  The long substrate, the liquid, the gravure roll, and the backup roll in the coating method are applied to those exemplified in the above-described liquid coating apparatus.

  In the application 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 conveyance direction is a method using the long base material separating member exemplified in the above-described liquid coating apparatus. It may be. As examples regarding the long base material separating member, the installation position, the number of installations, and the like, those illustrated in the above-described liquid application apparatus are applied.

  The present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

[Slip property]
The coefficient of static friction _μs of the surface of the long base material separating member used in each of the examples and the comparative examples and the cycloolefin polymer (COP) base material was measured. The static friction coefficient _μs was measured using a portable tribometer (Muse TYPE: 94i-II manufactured by Shinto Kagaku Co., Ltd.).

[Scratch property]
The surface of the long base material separating member used in each of the examples and comparative examples was rubbed with a cellulose triacetate (TAC) film (thickness 80 μm, length 40 mm × width 70 mm). Thereafter, the surface of the long base material separating member and the surface of the cellulose triacetate (TAC) film were visually observed and observed with a microscope.場合 indicates no damage, Δ indicates damage is acceptable, and X indicates damage.
Further, for the surface of the long base material separating member used in each of the examples and comparative examples, the arithmetic average roughness Ra and the maximum height Rz of the surface roughness were measured using a surface roughness meter (Surfcom 130A manufactured by Tokyo Seimitsu Co., Ltd., It was measured using JIS 2001 standard).

[Long substrate separating member A]
The long base material separating member made of SUS304 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 UV curable adhesive (viscosity 40 mPa · s)

[Example 1]
Evaluate the slipperiness and scratch property of the long base material separating member 1 in which an ultra-high molecular weight polyethylene tape (Ultra high molecular weight polyethylene tape product number: No. 4430 manufactured by Nitto Denko Corporation) is attached to the surface of the long base material separating member A. did. Table 1 shows the results.

[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 Tokaro Corporation) is applied to the entire surface of the long base material separating member A. The slip property and the scratch property were evaluated in the same manner as in Example 1 except that the applied long base material separating member 2 was used. Table 1 shows the results.

[Example 3]
Instead of attaching the ultrahigh molecular weight polyethylene tape to the surface of the long base member A in Example 1, a hard non-adhesive coating treatment (Nippon Fluorine Industry Co., Ltd.) was applied to the entire surface of the long base member A. The sliding property and the scratch property were evaluated in the same manner as in Example 1 except that the long base material separating member 3 subjected to the company's Aμcoat treatment) was used. Table 1 shows the results.

[Comparative Example 1]
Sliding property was obtained in the same manner as in Example 1, except that the ultra-high molecular weight polyethylene tape was attached to the surface of the long base material separating member A in Example 1, and the long base material separating member A was used as it was. And the scratch property was evaluated. Table 1 shows the results.

[Example 4]
As shown in FIG. 5, at each of both ends of the long base material width direction of the liquid coating apparatus 101, the long base separating member 108 is placed between the gravure roll 104 and the backup roll 107, and the rotation axis of the gravure roll 104 is rotated. One was installed at a position 30 mm away from the upstream side in the transport direction of the long base material and another at a position 30 mm away from the downstream side in the transport direction of the long base material. The ultrahigh molecular weight polyethylene tape of Example 1 was applied to the surface of the long base material separating member 108. The width of the contact surface between the long base material separation member 1 and the long base material is 6 mm in the long base material conveyance direction, 15 mm in the long base material width direction, and the long base material The angle between the contact surface and the gravure roll contact surface was 6 degrees.
As described above, in the laminate manufacturing apparatus including the liquid coating device in which the long base member separating member 108 is disposed, the long second film is continuously transferred, and the long first film is continuously transferred. An active energy ray-curable composition 1 is formed on a first film, and a gravure roll having a coating thickness of about 1.5 μm is formed without forming a curable composition layer in a region 15 mm from an end in the width direction of the first film. And then passed between laminating rolls. Thereafter, ultraviolet rays were continuously irradiated to cure the curable composition layer, thereby obtaining a laminate comprising the first film / cured layer / second film.
No damage to the long base material and the long base material separating member was observed. In addition, variations in the liquid application width to the long base material, meandering conveyance, 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, in the same manner as in Example 4 except that the long base material separating member 108 was used as SUS304 instead of attaching the ultrahigh molecular weight polyethylene tape to the surface of the long base material separating member 108, To produce a laminate. Damage was confirmed on the outside of the first film of the obtained laminate.

  101 liquid coating device, 102 long base material, 103 transport mechanism, 104 gravure roll, 105 liquid supply and circulation mechanism, 106 liquid, 107 backup roll, 108 non-coating part forming means, 109 blade, 201 long base material contact surface, 202 long base material application surface, 203 inclination angle, 204 liquid application width to long base material, 205 support member, 206 size in long base material conveyance direction, 207 dimension in long base material width direction, 208 inclination angle , 209 Tip size, 301 Laminate manufacturing apparatus, 302 resin film, 303 unwinding section, 304 resin film, 305 unwinding section, 306 nip roll, 307 UV irradiation apparatus, 308 guide roll, 309 long base material with coating film , 310 laminate

Claims (9)

Conveying means for conveying the long substrate in the length direction,
A gravure roll for applying a liquid to the surface of the long base material,
With
The width of the gravure roll is wider than the width of the liquid applied to the long base material,
In each of both ends in the width direction of the long base material, between the long base material and the gravure roll, to separate the end from the gravure roll while contacting the end of the long base material being conveyed A long base material separating member is provided,
The coefficient of static friction μ _s of the long base member separating member with respect to the cycloolefin polymer (COP) base on the long base contact surface that comes into contact with the long base is 0.35 or less, and the arithmetic average roughness of the surface roughness A liquid coating apparatus, wherein Ra is 0.22 μm or less, and maximum surface roughness height Rz is 2.2 μm or less.   The liquid application device according to claim 1, wherein an arithmetic average roughness Ra of a surface roughness of the long base material contact surface is 0.21 µm or less.   The liquid application device according to claim 1, wherein a maximum height Rz of a surface roughness of the long base material contact surface is 2 μm or less.   The long substrate separating member is provided at two or more different positions in the transport direction of the long substrate at each of both end portions in the width direction of the long substrate, according to any one of claims 1 to 3, The liquid application device according to any one of the preceding claims.   The long base material separating member is provided at each of one or more upstream and downstream sides in the transport direction of the long base material on the basis of the rotation axis of the gravure roll, at both ends in the width direction of the long base material, The liquid application device according to claim 1.   The liquid application device according to any one of claims 1 to 5, wherein the long base material separating member is movable in a width direction of the long base material.   The liquid application 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 device according to any one of claims 1 to 7, wherein a width of the long base material separating member and the long base material in contact with each other is 1 mm or more and 20 mm or less in a transport direction of the long base material. .   The liquid coating device according to any one of claims 1 to 8, wherein a width at which the long base member is in contact with the long base material is 1 mm or more and 100 mm or less in a width direction of the long base material. .

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