WO2014058020A1 - Roll coating device - Google Patents

Roll coating device Download PDF

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Publication number
WO2014058020A1
WO2014058020A1 PCT/JP2013/077616 JP2013077616W WO2014058020A1 WO 2014058020 A1 WO2014058020 A1 WO 2014058020A1 JP 2013077616 W JP2013077616 W JP 2013077616W WO 2014058020 A1 WO2014058020 A1 WO 2014058020A1
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WO
WIPO (PCT)
Prior art keywords
roller
doctor
coating
outer peripheral
coating roller
Prior art date
Application number
PCT/JP2013/077616
Other languages
French (fr)
Japanese (ja)
Inventor
義美 大谷
田中　信幸
Original Assignee
旭硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭硝子株式会社 filed Critical 旭硝子株式会社
Publication of WO2014058020A1 publication Critical patent/WO2014058020A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0856—Reverse coating rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating roller

Definitions

  • the present invention relates to a roll coating apparatus.
  • a roll that applies the chemical solution while transporting the substrate to be coated because maintenance is easy, the cost is low, and the coating efficiency is high.
  • Coating equipment is widely used.
  • the roll coating apparatus for example, a doctor roller and a coating roller that rotate in opposite directions with their outer peripheral surfaces in contact with each other, and a backup provided so as to sandwich the substrate to be coated between the coating roller And an apparatus having a roller.
  • the chemical solution is stored in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the outer peripheral surface of the coating roller holding the chemical solution is brought into contact with the surface of the substrate to be coated being conveyed. Chemical solution is applied.
  • the chemical solution stored in the part where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is prevented from leaking from the side end side in the axial direction of the doctor roller and the coating roller.
  • a liquid leakage prevention plate is used. Specifically, on the side end sides of both the doctor roller and the coating roller, the first surface of each of the two liquid leakage prevention plates, that is, the side surface on the roll end surface side, is coated with the side end surface of the doctor roller.
  • a roll coating apparatus is known which is pressed against both side end surfaces of a roller (see Patent Document 1).
  • Patent Document 1 when a conventional roll coating apparatus such as Patent Document 1 is used for a long period of time, the chemical liquid is likely to leak from between the side end surfaces of the doctor roller and the coating roller and the liquid leakage prevention plate.
  • a liquid storage pan is disposed under a liquid leakage prevention plate, and consideration is given so that the leakage of the chemical liquid does not cause contamination of a substrate to be coated, a backup roller, and the like located under the doctor roller and the coating roller. ing. Since the leakage of the chemical solution leads to waste of the chemical solution, it is economically disadvantageous.
  • the present invention provides a roll coating apparatus in which a chemical stored in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is difficult to leak from the side end side in the axial direction of the doctor roller and the coating roller.
  • the roll coating apparatus of the present invention includes a doctor roller and a coating roller that rotate in opposite rotation directions in a state in which the outer peripheral surfaces are in contact with each other; A backup roller provided so as to sandwich the substrate to be conveyed conveyed between the coating roller; Two liquid leakage prevention plates provided between both ends in the axial direction of the coating roller and the doctor roller, The length of the doctor roller is longer than the length of the coating roller, The doctor roller sides of the two liquid leakage prevention plates each have a side end surface curved in a concave shape so as to follow the outer peripheral surface of the doctor roller, The coating roller sides of the two liquid leakage prevention plates each have a side surface pressed against the side end surface of the coating roller, In addition, the concavely curved side end surfaces of each of the two liquid leakage prevention plates described above are pressed against the outer peripheral surface of the doctor roller, while each of the two liquid leakage prevention plates described above.
  • the side surface is pressed against the side end surface of the coating roller, A chemical solution is accumulated in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the chemical solution attached to the outer peripheral surface of the coating roller is applied to the surface of the substrate to be applied that is in contact with the outer peripheral surface.
  • Device The side surface is pressed against the side end surface of the coating roller, A chemical solution is accumulated in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the chemical solution attached to the outer peripheral surface of the coating roller is applied to the surface of the substrate to be applied that is in contact with the outer peripheral surface.
  • the roll coating apparatus of the present invention further comprises a slit forming plate provided along the axial direction of the doctor roller on the coating roller side of the topmost line which is the highest position of the doctor roller, A slit is formed between the slit forming plate and the outer peripheral surface of the doctor roller, the chemical solution is supplied between the topmost line on the outer peripheral surface of the doctor roller and the slit forming plate, and the chemical solution is supplied to the slit. It is preferable that the outer peripheral surfaces of the doctor roller and the coating roller are accumulated in a contact portion. Moreover, the roll coating apparatus of the present invention further contacts the outer peripheral surface of the coating roller along the axial direction of the coating roller, closer to the doctor roller than the topmost line that is the highest position of the coating roller.
  • a doctor blade is preferably provided. Further, in the roll coating apparatus of the present invention, both end portions of the doctor blade protrude from the coating roller, and the doctor blade is located below the protruding portion of the doctor blade on both side end surfaces of the coating roller. It is preferable to provide a waste liquid tray in which the chemical liquid scraped off from the outer peripheral surface of the coating roller is accumulated.
  • the chemical solution stored in the portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is difficult to leak from the side ends in the axial direction of the doctor roller and the coating roller.
  • the roll coating apparatus 1 of this embodiment includes a doctor roller 12, a coating roller 14, a backup roller 16, four transport rollers 18, and two liquid leakage prevention plates 20.
  • the liquid supply nozzle 22, the slit forming plate 24, the doctor blade 26, and the two waste liquid trays 28 are provided.
  • the doctor roller 12 and the coating roller 14 are provided in a state where their outer peripheral surfaces are in contact with each other.
  • the backup roller 16 and the four transport rollers 18 are provided so as to be parallel to each other and at a predetermined interval at the same height.
  • the substrate to be coated 30 is transported by the rotation of each transport roller 18. Further, the backup roller 16 is provided below the coating roller 14 so as to sandwich the substrate 30 to be transported between the backup roller 16 and the coating roller 14.
  • the two liquid leakage prevention plates 20 are respectively provided on both end sides of the coating roller 14 in the axial direction.
  • the slit forming plate 24 is provided along the axial direction of the doctor roller 12 closer to the coating roller 14 than the topmost line 12b, which is the highest position of the doctor roller 12.
  • the length of the slit forming plate 24 is slightly shorter than the distance between the two liquid leakage preventing plates 20 provided on both ends of the coating roller 14, and the slit forming plate 24 is between the two liquid leakage preventing plates 20. Is located.
  • the chemical supply nozzle 22 is provided above the outer peripheral surface 12 a of the doctor roller 12 between the slit forming plate 24 and the topmost line 12 b of the doctor roller 12.
  • the doctor blade 26 is provided along the axial direction of the coating roller 14 on the side of the doctor roller 12 with respect to the top line 14b which is the highest position of the coating roller 14. Both end portions 26a, 26b in the axial direction of the doctor blade 26 protrude from the coating roller 14, and two waste liquid trays 28 are respectively provided below the both end portions 26a, 26b of the doctor blade 26 protruding from the coating roller 14. Yes.
  • doctor roller, coating roller In a portion where the outer peripheral surface 12 a of the doctor roller 12 and the outer peripheral surface 14 a of the coating roller 14 are in contact with each other, a chemical A for application to the substrate to be applied 30 is stored.
  • the doctor roller 12 and the coating roller 14 rotate in opposite rotation directions with the outer peripheral surfaces 12a and 14a in contact with each other. Specifically, the rotation direction of the doctor roller 12 (right rotation direction in FIG. 1) and the rotation of the coating roller 14 so that the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 do not rub against each other.
  • the direction (left rotation direction in FIG. 1) is opposite, and the rotation speed is synchronized.
  • the chemical solution A adheres to the outer peripheral surface 14 a of the coating roller 14.
  • the doctor roller 12 and the coating roller 14 are arranged such that the radius of the cross section perpendicular to the axial direction of the doctor roller 12 is r 1 and the radius of the cross section perpendicular to the axial direction of the coating roller 14 is r 2.
  • the distance d between the shaft and the central axis of the coating roller 14 is arranged to be smaller than r 1 + r 2 . Thereby, it is suppressed that the chemical
  • the distance d is preferably 0.1 to 1.0 mm smaller than the r 1 + r 2 , and more preferably 0.5 to 0.7 mm smaller.
  • the length D1 (see FIG. 3) of the doctor roller 12 is longer than the length D2 (see FIG. 3) of the coating roller 14.
  • the difference (D1 ⁇ D2) between the length D1 of the doctor roller 12 and the length D2 of the coating roller 14 is preferably 10 to 60 mm, and more preferably 10 to 30 mm.
  • the outer peripheral surface 12a of the doctor roller 12 is grooved such as a lattice type.
  • the material of the doctor roller 12 is preferably a metal from the viewpoint that precise groove processing of the outer peripheral surface is easy.
  • the material of the coating roller 14 is preferably solvent resistant rubber.
  • the hardness of the rubber forming the coating roller 14 is preferably 20 to 50 degrees, more preferably 30 to 45 degrees. When the hardness is in the above range, it becomes easy to form a thin coating film using the low-viscosity chemical solution A.
  • the hardness of the rubber here is the hardness of the rubber measured according to the standard of JIS K 6253. The same applies hereinafter.
  • the surface roughness of the coating roller 14 is preferably 1.2 ⁇ m or less, and more preferably 0.7 to 0.9 ⁇ m. If the surface roughness is at least the lower limit value, an economical coating roll polishing finish is possible. If the surface roughness is less than or equal to the upper limit value, a coating film appearance excellent in uniformity can be obtained.
  • the surface roughness here is the arithmetic average roughness Ra. The same applies hereinafter.
  • the surface roughness is measured by a surface roughness measuring instrument (product name “SJ-210” manufactured by Mitutoyo Corporation).
  • the substrate to be coated 30 being transported is sandwiched between the backup roller 16 and the coating roller 14.
  • the outer peripheral surface 14 a of the coating roller 14 and the surface 30 a of the substrate to be coated 30 are sufficiently in contact with each other, and the chemical solution adhered to the outer peripheral surface 14 a of the coating roller 14.
  • A is transferred to the surface 30a of the substrate to be coated 30 and applied.
  • the conveyance direction (right direction in FIG. 1) of the substrate 30 to be coated by the conveyance roller 18 and the rotation direction (left rotation direction in FIG. 1) of the coating roller 14 are the contact points of the coating roller 14 and the substrate 30 to be coated. Are in opposite directions. That is, the roll coating apparatus 1 is a reverse coating method.
  • the distance between the coating roller 14 and the backup roller 16 is preferably 0.1 to 1.0 mm smaller than the thickness of the substrate 30 to be coated, and more preferably 0.2 to 0.4 mm smaller.
  • the length of the backup roller 16 is preferably shorter than the coating roller 14.
  • a solvent resistant rubber is preferable.
  • the hardness of the rubber forming the backup roller 16 is preferably 40 to 80 degrees, more preferably 50 to 70 degrees. When the hardness is equal to or higher than the lower limit, the contact of the substrate to be coated with the coating roller becomes uniform. If the hardness is less than or equal to the upper limit value, there is an effect of absorbing warpage of the substrate to be coated, and it becomes easy for the substrate to be coated to enter the roller.
  • the transport roller 18 a known transport roller can be used without any particular limitation.
  • the doctor roller side of the liquid leakage prevention plate 20 has a side end surface 20 a that is curved in a concave shape so as to follow the outer peripheral surface 12 a of the doctor roller 12.
  • the side end surfaces 20 a of the two liquid leakage prevention plates 20 are pressed against the outer peripheral surface 12 a of the side end portion of the doctor roller 12.
  • the side surfaces 20b of the two liquid leakage prevention plates on the side of the coating roller 14 opposite to the side end surface 20a are pressed against the side end surface 14c of the coating roller 14, respectively.
  • each liquid leakage prevention plate 20 is provided such that the side end surface 20a is in contact with the outer peripheral surface 12a of the doctor roller 12, and the first surface 20b is in contact with the side end surface 14c of the coating roller 14. Yes.
  • the side end surface 20c adjacent to the side surface 20b of the liquid leakage prevention plate 20 that is pressed against the side end surface 14c of the coating roller 14 is a concavely curved portion along the peripheral edge of the side end surface 14c of the coating roller 14. Have. Thereby, the contact area between the side end surface 14c of the coating roller 14 and the first surface 20b of the liquid leakage preventing plate 20 is reduced, and the resistance when the coating roller 14 is rotated is reduced.
  • a pipe or the like is connected to the liquid leakage prevention plate 20 in order to discharge the chemical solution A stored in the contact portion between the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 as necessary.
  • a discharge part may be provided.
  • the material of the liquid leakage prevention plate 20 may be any material that can prevent leakage of the chemical liquid A from the contact portion with the outer peripheral surface 12a of the doctor roller 12 and the contact portion with the side end surface 14c of the coating roller 14, for example, And polyacetal.
  • a slit 32 is formed between the outer peripheral surface 12 a of the doctor roller 12 and the slit forming plate 24 on the coating roller 14 side of the topmost line 12 b of the doctor roller 12.
  • the chemical solution A supplied from the chemical solution supply nozzle 22 between the top line 12b and the slit forming plate 24 on the outer peripheral surface 12a of the doctor roller 12 passes through the slit 32, and the outer peripheral surface 12a of the doctor roller 12 and the coating roller. 14 is accumulated in a portion in contact with the outer peripheral surface 14a. Thereby, it is suppressed that the chemical
  • the roll coating apparatus 1 there is a gap between the slit forming plate 24 and the two liquid leakage preventing plates 20 located on both sides of the slit forming plate 24.
  • the chemical solution A supplied between the topmost line 12b and the slit forming plate 24 on the outer peripheral surface 12a of the doctor roller 12 also flows down from the gap, but the gap is outside the width of the substrate 30 to be coated. So no problem arises.
  • the width of the slit 32 is preferably 0 to 0.4 mm, more preferably 0 to 0.1 mm, although it depends on the viscosity of the chemical solution A.
  • the chemical liquid supply nozzle 22 a known liquid supply nozzle can be employed without any particular limitation.
  • the slit forming plate 24 is not particularly limited as long as slits 32 having a predetermined interval can be formed between the outer peripheral surface 12 a of the doctor roller 12 and the slit forming plate 24.
  • a doctor blade, a roll bar, a squeegee or the like can be used as the slit forming plate 24.
  • the doctor blade 26 is provided so as to be inclined along the rotation direction of the outer peripheral surface 14 a of the coating roller 14.
  • the distal end of the doctor blade 26 is in contact with the outer peripheral surface 14 a of the coating roller 14 on the doctor roller 12 side with respect to the top line 14 b of the coating roller 14.
  • the chemical solution A remaining on the outer peripheral surface 14 a of the coating roller 14 after contact with the surface 30 a of the substrate to be coated 30 is scraped off by the doctor blade 26.
  • the length of the doctor blade 26 in the axial direction is longer than the length of the coating roller 14 in the axial direction, and both end portions 26a, 26b of the doctor blade 26 protrude from the coating roller 14, so that the scraped chemical solution A is applied to the coating roller.
  • 14 flows down from both side end faces 14c and 14c and is collected in the waste liquid tray 28.
  • a pipe for discharging the waste liquid is connected to the waste liquid receiving tray 28 (not shown).
  • the material and shape of the doctor blade 26 are not particularly limited, and a known doctor blade can be employed.
  • the doctor blade 26 is preferably pressed against the outer peripheral surface 14a of the coating roller 14 with a pressing force of 0.01 to 0.20 N / mm. If the pressing force is equal to or greater than the lower limit value, the chemical solution A remaining on the outer peripheral surface 14a of the coating roller 14 after contact with the surface 30a of the substrate to be coated 30 can be sufficiently scraped off and recovered as a waste solution. A film can be formed. If the pressing force is less than or equal to the upper limit value, it is easy to suppress wear of the outer peripheral surface 14a of the coating roller 14.
  • the pressing force is more preferably 0.05 to 0.15 N / mm, and particularly preferably 0.08 to 0.12 N / mm.
  • the pressing of the doctor blade 26 to the coating roller 14 can be defined by the pressing amount in addition to the pressing force.
  • the pressing amount means the maximum depth of the concave portion of the outer peripheral surface 14a of the coating roller 14 that is pressed by the doctor blade 26.
  • the pressing amount of the doctor blade 26 is more preferably 0.5 to 1.2 mm, and particularly preferably 0.7 to 1.0 mm.
  • a pressing mechanism that presses the doctor blade 26 against the outer peripheral surface 14a of the coating roller 14 along the vertical direction, and a doctor blade 26 along the horizontal direction.
  • a pressing member provided with a pressing mechanism that presses against the outer peripheral surface 14a of the coating roller 14 is preferable.
  • both the vertical and horizontal pressing forces are within the above range.
  • the doctor blade 26 is pressed by the pressing member so that three or more portions along the length direction of the doctor blade 26 can be independently pressed.
  • the doctor blade 26 that is, both end portions 26a and 26b and the center portion 26c of the doctor blade 26 can be independently pressed.
  • the doctor blade 26 there may be mentioned a configuration in which three pressing members are provided independently at three locations of both end portions 26a and 26b of the doctor blade 26 and the central portion 26c of the doctor blade 26, respectively.
  • the pressing force of the doctor blade 26 against the outer peripheral surface 14a of the coating roller 14 can be controlled more precisely, and it becomes easy to form a uniform coating film on the surface 30a of the substrate 30 to be coated.
  • the chemical liquid A used for the roll coating apparatus 1 is not particularly limited, and examples thereof include paint ink.
  • the substrate to be coated 30 is not particularly limited, and examples thereof include a glass plate, a resin plate, and a metal plate.
  • the chemical solution A is supplied from the chemical solution supply nozzle 22 between the top line 12 b and the slit forming plate 24 on the outer peripheral surface 12 a of the doctor roller 12.
  • the supplied chemical solution A passes through the slit 32 between the outer peripheral surface 12a of the doctor roller 12 and the slit forming plate 24, and the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 are in contact with each other. Accumulated in the part.
  • the chemical liquid A stored in the portion is prevented from leaking from both end sides of the doctor roller 12 and the coating roller 14 by the liquid leakage prevention plate 20.
  • the doctor roller 12 and the coating roller 14 rotate with each other, and the chemical solution A adheres to the outer peripheral surface 14a of the coating roller 14 that has passed through the portion where the chemical solution A is stored.
  • the liquid leakage prevention plate 20 is pressed against the outer peripheral surface 12a of the doctor roller 12 and the side end surface 14c of the coating roller 14 respectively.
  • the force for pressing the side end surface 20a of the liquid leakage prevention plate 20 against the outer peripheral surface 12a of the doctor roller 12 and the force for pressing the side surface 20b of the liquid leakage prevention plate 20 on the coating roller 14 side against the side end surface 14c of the coating roller 14 are respectively Since the direction is different, it can be adjusted independently. Therefore, the wear of the doctor roller 12 does not affect the adhesion between the side surface 20 b of the liquid leakage prevention plate 20 on the coating roller 14 side and the side end surface 14 c of the coating roller 14.
  • the wear of the coating roller 14 does not affect the adhesion between the side end surface 20 a of the liquid leakage prevention plate 20 and the outer peripheral surface 12 a of the doctor roller 12.
  • the adhesion between the side surface 20b on the coating roller 14 side of the liquid leakage prevention plate 20 and the side end surface 14c of the coating roller 14, and the liquid leakage Adhesiveness between the side end surface 20a of the prevention plate 20 and the outer peripheral surface 12a of the doctor roller 12 can be sufficiently maintained. Therefore, the chemical liquid A is sufficiently suppressed from leaking at any of the contact portion between the liquid leakage prevention plate 20 and the doctor roller 12 and the contact portion between the liquid leakage prevention plate 20 and the coating roller 14.
  • the substrate to be coated 30 is transported in the direction opposite to the rotation direction of the coating roller 14 by the transport roller 18 so as to be sandwiched between the coating roller 14 and the backup roller 16.
  • the outer peripheral surface 14 a of the coating roller 14 to which the chemical liquid A adheres contacts the surface 30 a of the substrate to be coated 30, and from the outer peripheral surface 14 a of the coating roller 14.
  • the chemical liquid A is transferred to the surface 30a of the substrate to be coated 30, and the chemical liquid A is applied.
  • the chemical liquid A remaining on the outer peripheral surface 14 a of the coating roller 14 after coming into contact with the substrate to be coated 30 is scraped off by the doctor blade 26 and collected in the waste liquid tray 28.
  • the solvent is easily evaporated, and the solid content concentration of the chemical solution A is likely to increase.
  • the coating film formed on the surface 30a of the substrate 30 to be coated may be non-uniform. There is.
  • the doctor blade 26 scrapes off the chemical liquid A remaining on the outer peripheral surface 14a of the coating roller 14 and collects it as waste liquid, so that it becomes easy to form a uniform coating film on the surface 30a of the substrate 30 to be coated.
  • the roll coating apparatus of the present invention is not limited to the roll coating apparatus 1 described above.
  • the roll coating apparatus of the present invention may not have a slit forming plate.
  • the roll coating apparatus of this invention does not need to have a doctor blade and a waste-liquid tray.
  • the number of transport rolls may be 3 or less, or 5 or more.
  • the roll coating apparatus of the present invention it is possible for the chemical liquid stored in the portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other to leak from the side end sides in the axial direction of the doctor roller and the coating roller. It can be reduced as much as possible, the waste of the chemical solution can be eliminated, and the cost can be reduced.

Abstract

Provided is a roll coating device in which chemical fluid accumulating in a part where the peripheral surfaces of a doctor roller and coating roller come into contact with each other does not leak easily. The roll coating device (1) has: a doctor roller (12); a coating roller (14); a backup roller (16); and two liquid leak prevention plates (20). Each of the two liquid leak prevention plates (20) has a side end surface (20a) curved in a concave shape along a peripheral surface (12a) of the doctor roller (12). A first surface of each of the two liquid leak prevention plates (20) is pressed against a side end surface (14c) of the coating roller (14), and each of the side end surfaces (20a) is pressed against the peripheral surface (12a) of the doctor roller (12). A chemical fluid (A) accumulating between the doctor roller (12) and the coating roller (14) is applied to a surface (30a) of a substrate (30) to be coated via a peripheral surface (14a) of the coating roller (14).

Description

ロールコーティング装置Roll coating equipment
　本発明は、ロールコーティング装置に関する。 The present invention relates to a roll coating apparatus.
　ガラス板等の被塗布基板の表面に薬液等を塗布する際には、メンテナンスが容易で、コストも低く、塗布効率も高い点から、該被塗布基板を搬送しつつ薬液等の塗布を行うロールコーティング装置が広く用いられている。ロールコーティング装置としては、例えば、互いの外周面同士が接触した状態で反対の回転方向に回転するドクターローラおよびコーティングローラと、前記コーティングローラとの間に被塗布基板を挟み込むように設けられたバックアップローラとを有する装置が挙げられる。該ロールコーティング装置では、ドクターローラおよびコーティングローラの外周面同士が接触した部分に薬液を溜め、薬液を保持させたコーティングローラの外周面を、搬送している被塗布基板の表面に接触させることで薬液が塗布される。 When applying a chemical solution or the like to the surface of a substrate to be coated such as a glass plate, a roll that applies the chemical solution while transporting the substrate to be coated because maintenance is easy, the cost is low, and the coating efficiency is high. Coating equipment is widely used. As the roll coating apparatus, for example, a doctor roller and a coating roller that rotate in opposite directions with their outer peripheral surfaces in contact with each other, and a backup provided so as to sandwich the substrate to be coated between the coating roller And an apparatus having a roller. In the roll coating apparatus, the chemical solution is stored in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the outer peripheral surface of the coating roller holding the chemical solution is brought into contact with the surface of the substrate to be coated being conveyed. Chemical solution is applied.
　このようなロールコーティング装置においては、ドクターローラおよびコーティングローラの外周面同士が接触されている部分に溜められている薬液が、ドクターローラおよびコーティングローラの軸方向の側端側から漏れ落ちないように、液漏れ防止板が用いられる。具体的には、ドクターローラおよびコーティングローラの両方の側端側において、２枚の液漏れ防止板の各々の第１の面、すなわち、これらロール端面側の側面を、ドクターローラの側端面とコーティングローラの側端面の両方に押し付けるようにしたロールコーティング装置が知られている（特許文献１参照）。 In such a roll coating apparatus, the chemical solution stored in the part where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is prevented from leaking from the side end side in the axial direction of the doctor roller and the coating roller. A liquid leakage prevention plate is used. Specifically, on the side end sides of both the doctor roller and the coating roller, the first surface of each of the two liquid leakage prevention plates, that is, the side surface on the roll end surface side, is coated with the side end surface of the doctor roller. A roll coating apparatus is known which is pressed against both side end surfaces of a roller (see Patent Document 1).
日本特開昭５８－８４０７３号公報Japanese Unexamined Patent Publication No. 58-84073
　しかし、特許文献１のような従来のロールコーティング装置は、長期間使用した場合に、ドクターローラおよびコーティングローラの側端面と液漏れ防止板との間から薬液が漏れやすくなる。特許文献１では、液漏れ防止板の下に液溜めパンが配置され、該薬液の漏れが、ドクターローラおよびコーティングローラの下に位置する被塗布基板、バックアップローラ等の汚染を引き起こさないよう配慮されている。該薬液の漏れは、薬液の浪費にも繋がるため、経済的にも不利である。 However, when a conventional roll coating apparatus such as Patent Document 1 is used for a long period of time, the chemical liquid is likely to leak from between the side end surfaces of the doctor roller and the coating roller and the liquid leakage prevention plate. In Patent Document 1, a liquid storage pan is disposed under a liquid leakage prevention plate, and consideration is given so that the leakage of the chemical liquid does not cause contamination of a substrate to be coated, a backup roller, and the like located under the doctor roller and the coating roller. ing. Since the leakage of the chemical solution leads to waste of the chemical solution, it is economically disadvantageous.
　本発明は、ドクターローラおよびコーティングローラの外周面同士が接触されている部分に溜められている薬液が、ドクターローラおよびコーティングローラの軸方向の側端側から漏れ難いロールコーティング装置を提供する。 The present invention provides a roll coating apparatus in which a chemical stored in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is difficult to leak from the side end side in the axial direction of the doctor roller and the coating roller.
　本発明のロールコーティング装置は、互いの外周面同士が接触した状態で反対の回転方向に回転するドクターローラおよびコーティングローラと、
　前記コーティングローラとの間に搬送される被塗布基板を挟み込むように設けられたバックアップローラと、
　前記コーティングローラとドクターローラの軸方向の両端側のそれぞれの間に設けられた２つの液漏れ防止板と、を有し、
　前記ドクターローラの長さが前記コーティングローラの長さよりも長くなっており、
　前記２つの液漏れ防止板の前記ドクターローラ側は、それぞれ、前記ドクターローラの外周面に沿うように凹状に湾曲した側端面を有し、
　前記２つの液漏れ防止板のコーティングローラ側は、それぞれ、前記コーティングローラの側端面に押し付けられる側面を有し、
　かつ、前記した２つの液漏れ防止板の各々の前記凹状に湾曲した側端面は、前記したドクターローラの外周面に押し付けられており、一方、前記した２つの液漏れ防止板の各々の前記した側面は、前記コーティングローラの側端面に押し付けられており、
　前記ドクターローラと前記コーティングローラの外周面同士が接触した部分に薬液が溜められ、前記コーティングローラの外周面に付着した前記薬液が、該外周面と接触する前記被塗布基板の表面に塗布される装置である。 The roll coating apparatus of the present invention includes a doctor roller and a coating roller that rotate in opposite rotation directions in a state in which the outer peripheral surfaces are in contact with each other;
A backup roller provided so as to sandwich the substrate to be conveyed conveyed between the coating roller;
Two liquid leakage prevention plates provided between both ends in the axial direction of the coating roller and the doctor roller,
The length of the doctor roller is longer than the length of the coating roller,
The doctor roller sides of the two liquid leakage prevention plates each have a side end surface curved in a concave shape so as to follow the outer peripheral surface of the doctor roller,
The coating roller sides of the two liquid leakage prevention plates each have a side surface pressed against the side end surface of the coating roller,
In addition, the concavely curved side end surfaces of each of the two liquid leakage prevention plates described above are pressed against the outer peripheral surface of the doctor roller, while each of the two liquid leakage prevention plates described above. The side surface is pressed against the side end surface of the coating roller,
A chemical solution is accumulated in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the chemical solution attached to the outer peripheral surface of the coating roller is applied to the surface of the substrate to be applied that is in contact with the outer peripheral surface. Device.
　本発明のロールコーティング装置は、さらに、前記ドクターローラの最も高い位置である最頂ラインよりも前記コーティングローラ側に、前記ドクターローラの軸方向に沿って設けられたスリット形成板を有し、前記スリット形成板と前記ドクターローラの外周面との間にスリットが形成され、前記ドクターローラの外周面における前記最頂ラインと前記スリット形成板との間に前記薬液が供給され、該薬液が前記スリットを通って、前記ドクターローラと前記コーティングローラの外周面同士が接触した部分に溜められることが好ましい。
　また、本発明のロールコーティング装置は、さらに、前記コーティングローラの最も高い位置である最頂ラインよりも前記ドクターローラ側に、前記コーティングローラの軸方向に沿って、前記コーティングローラの外周面に接するドクターブレードが設けられていることが好ましい。
　また、本発明のロールコーティング装置では、前記ドクターブレードの両端部が前記コーティングローラからはみ出しており、前記コーティングローラの両方の側端面側における前記ドクターブレードのはみ出した部分の下側に、前記ドクターブレードによって前記コーティングローラの外周面から掻き取られた薬液が溜まる廃液受け皿が設けられていることが好ましい。 The roll coating apparatus of the present invention further comprises a slit forming plate provided along the axial direction of the doctor roller on the coating roller side of the topmost line which is the highest position of the doctor roller, A slit is formed between the slit forming plate and the outer peripheral surface of the doctor roller, the chemical solution is supplied between the topmost line on the outer peripheral surface of the doctor roller and the slit forming plate, and the chemical solution is supplied to the slit. It is preferable that the outer peripheral surfaces of the doctor roller and the coating roller are accumulated in a contact portion.
Moreover, the roll coating apparatus of the present invention further contacts the outer peripheral surface of the coating roller along the axial direction of the coating roller, closer to the doctor roller than the topmost line that is the highest position of the coating roller. A doctor blade is preferably provided.
Further, in the roll coating apparatus of the present invention, both end portions of the doctor blade protrude from the coating roller, and the doctor blade is located below the protruding portion of the doctor blade on both side end surfaces of the coating roller. It is preferable to provide a waste liquid tray in which the chemical liquid scraped off from the outer peripheral surface of the coating roller is accumulated.
　本発明のロールコーティング装置は、ドクターローラおよびコーティングローラの外周面同士が接触されている部分に溜められている薬液が、ドクターローラおよびコーティングローラの軸方向の側端側から漏れ難い。 In the roll coating apparatus of the present invention, the chemical solution stored in the portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other is difficult to leak from the side ends in the axial direction of the doctor roller and the coating roller.
本発明のロールコーティング装置の概略構成図である。It is a schematic block diagram of the roll coating apparatus of this invention. 図１のロールコーティング装置におけるドクターローラおよびコーティングローラの近傍を示した斜視図である。It is the perspective view which showed the vicinity of the doctor roller and coating roller in the roll coating apparatus of FIG. 図１のロールコーティング装置におけるドクターローラおよびコーティングローラの近傍を示した平面図である。It is the top view which showed the vicinity of the doctor roller and coating roller in the roll coating apparatus of FIG.
　本発明のロールコーティング装置の一例を、図１～３に基づいて説明する。
　本実施形態のロールコーティング装置１は、図１～３に示すように、ドクターローラ１２と、コーティングローラ１４と、バックアップローラ１６と、４個の搬送ローラ１８と、２つの液漏れ防止板２０と、薬液供給ノズル２２と、スリット形成板２４と、ドクターブレード２６と、２つの廃液受け皿２８と、を有する。 An example of the roll coating apparatus of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the roll coating apparatus 1 of this embodiment includes a doctor roller 12, a coating roller 14, a backup roller 16, four transport rollers 18, and two liquid leakage prevention plates 20. The liquid supply nozzle 22, the slit forming plate 24, the doctor blade 26, and the two waste liquid trays 28 are provided.
　ドクターローラ１２とコーティングローラ１４とは、互いの外周面同士が接触した状態で設けられている。
　バックアップローラ１６と４個の搬送ローラ１８とは、互いに平行するように、かつ同じ高さで所定の間隔を空けて設けられている。各々の搬送ローラ１８の回転によって被塗布基板３０が搬送される。また、バックアップローラ１６は、コーティングローラ１４の下方において、コーティングローラ１４との間に、搬送される被塗布基板３０を挟み込むように設けられている。
　２つの液漏れ防止板２０は、コーティングローラ１４の軸方向の両端側にそれぞれ設けられている。 The doctor roller 12 and the coating roller 14 are provided in a state where their outer peripheral surfaces are in contact with each other.
The backup roller 16 and the four transport rollers 18 are provided so as to be parallel to each other and at a predetermined interval at the same height. The substrate to be coated 30 is transported by the rotation of each transport roller 18. Further, the backup roller 16 is provided below the coating roller 14 so as to sandwich the substrate 30 to be transported between the backup roller 16 and the coating roller 14.
The two liquid leakage prevention plates 20 are respectively provided on both end sides of the coating roller 14 in the axial direction.
　スリット形成板２４は、ドクターローラ１２の最も高い位置である最頂ライン１２ｂよりもコーティングローラ１４側に、ドクターローラ１２の軸方向に沿って設けられている。スリット形成板２４の長さは、コーティングローラ１４の両端側に設けられた２枚の液漏れ防止板２０の間隔よりもわずかに短く、２枚の液漏れ防止板２０の間にスリット形成板２４が位置している。
　薬液供給ノズル２２は、スリット形成板２４と、ドクターローラ１２の最頂ライン１２ｂとの間におけるドクターローラ１２の外周面１２ａの上方に設けられている。 The slit forming plate 24 is provided along the axial direction of the doctor roller 12 closer to the coating roller 14 than the topmost line 12b, which is the highest position of the doctor roller 12. The length of the slit forming plate 24 is slightly shorter than the distance between the two liquid leakage preventing plates 20 provided on both ends of the coating roller 14, and the slit forming plate 24 is between the two liquid leakage preventing plates 20. Is located.
The chemical supply nozzle 22 is provided above the outer peripheral surface 12 a of the doctor roller 12 between the slit forming plate 24 and the topmost line 12 b of the doctor roller 12.
　ドクターブレード２６は、コーティングローラ１４の最も高い位置である最頂ライン１４ｂよりもドクターローラ１２側に、コーティングローラ１４の軸方向に沿って設けられている。ドクターブレード２６の軸方向の両端部２６ａ，２６ｂはコーティングローラ１４からはみ出しており、ドクターブレード２６におけるコーティングローラ１４からはみ出した両端部２６ａ，２６ｂの下側に２つの廃液受け皿２８がそれぞれ設けられている。 The doctor blade 26 is provided along the axial direction of the coating roller 14 on the side of the doctor roller 12 with respect to the top line 14b which is the highest position of the coating roller 14. Both end portions 26a, 26b in the axial direction of the doctor blade 26 protrude from the coating roller 14, and two waste liquid trays 28 are respectively provided below the both end portions 26a, 26b of the doctor blade 26 protruding from the coating roller 14. Yes.
（ドクターローラ、コーティングローラ）
　ドクターローラ１２の外周面１２ａと、コーティングローラ１４の外周面１４ａとが接触する部分には、被塗布基板３０に塗布するための薬液Ａが溜められる。
　ドクターローラ１２とコーティングローラ１４とは、互いの外周面１２ａ，１４ａを接触させた状態で反対の回転方向に回転する。具体的には、ドクターローラ１２の外周面１２ａと、コーティングローラ１４の外周面１４ａとが擦れ合わないように、ドクターローラ１２の回転方向（図１において、右回転方向）とコーティングローラ１４の回転方向（図１において、左回転方向）とが反対とされ、回転速度が同期するようになっている。
　ドクターローラ１２とコーティングローラ１４が互いに回転することで、コーティングローラ１４の外周面１４ａに薬液Ａが付着する。 (Doctor roller, coating roller)
In a portion where the outer peripheral surface 12 a of the doctor roller 12 and the outer peripheral surface 14 a of the coating roller 14 are in contact with each other, a chemical A for application to the substrate to be applied 30 is stored.
The doctor roller 12 and the coating roller 14 rotate in opposite rotation directions with the outer peripheral surfaces 12a and 14a in contact with each other. Specifically, the rotation direction of the doctor roller 12 (right rotation direction in FIG. 1) and the rotation of the coating roller 14 so that the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 do not rub against each other. The direction (left rotation direction in FIG. 1) is opposite, and the rotation speed is synchronized.
As the doctor roller 12 and the coating roller 14 rotate with each other, the chemical solution A adheres to the outer peripheral surface 14 a of the coating roller 14.
　ドクターローラ１２とコーティングローラ１４とは、ドクターローラ１２の軸方向に垂直な断面の半径をｒ１、コーティングローラ１４の軸方向に垂直な断面の半径をｒ２としたとき、ドクターローラ１２の中心軸とコーティングローラ１４の中心軸との距離ｄがｒ１＋ｒ２よりも小さくなるように配置する。これにより、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとの間から薬液Ａが漏れ落ちることが抑制される。
　前記距離ｄは、前記ｒ１＋ｒ２に対して、０．１～１．０ｍｍ小さいことが好ましく、０．５～０．７ｍｍ小さいことがより好ましい。 The doctor roller 12 and the coating roller 14 are arranged such that the radius of the cross section perpendicular to the axial direction of the doctor roller 12 is r 1 and the radius of the cross section perpendicular to the axial direction of the coating roller 14 is r 2. The distance d between the shaft and the central axis of the coating roller 14 is arranged to be smaller than r 1 + r 2 . Thereby, it is suppressed that the chemical | medical solution A leaks from between the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14. FIG.
The distance d is preferably 0.1 to 1.0 mm smaller than the r 1 + r 2 , and more preferably 0.5 to 0.7 mm smaller.
　ドクターローラ１２の長さＤ１（図３参照）は、コーティングローラ１４の長さＤ２（図３参照）よりも長くなっている。ドクターローラ１２の長さＤ１とコーティングローラ１４の長さＤ２の差（Ｄ１－Ｄ２）は、１０～６０ｍｍが好ましく、１０～３０ｍｍがより好ましい。
　ドクターローラ１２の外周面１２ａは、格子型等の溝加工が施されている。
　ドクターローラ１２の材質としては、外周面の精密な溝加工が容易な点から、金属が好ましい。 The length D1 (see FIG. 3) of the doctor roller 12 is longer than the length D2 (see FIG. 3) of the coating roller 14. The difference (D1−D2) between the length D1 of the doctor roller 12 and the length D2 of the coating roller 14 is preferably 10 to 60 mm, and more preferably 10 to 30 mm.
The outer peripheral surface 12a of the doctor roller 12 is grooved such as a lattice type.
The material of the doctor roller 12 is preferably a metal from the viewpoint that precise groove processing of the outer peripheral surface is easy.
　コーティングローラ１４の材質としては、耐溶剤性のゴムが好ましい。
　コーティングローラ１４を形成するゴムの硬度は、２０～５０度が好ましく、３０～４５度がより好ましい。前記硬度が前記範囲であれば、低粘度な薬液Ａを用いて薄い塗膜を形成することが容易になる。ここにおけるゴムの硬度は、ＪＩＳ　Ｋ　６２５３の規格に準拠して測定したゴムの硬度である。以下、同様である。 The material of the coating roller 14 is preferably solvent resistant rubber.
The hardness of the rubber forming the coating roller 14 is preferably 20 to 50 degrees, more preferably 30 to 45 degrees. When the hardness is in the above range, it becomes easy to form a thin coating film using the low-viscosity chemical solution A. The hardness of the rubber here is the hardness of the rubber measured according to the standard of JIS K 6253. The same applies hereinafter.
　コーティングローラ１４の表面粗さは、１．２μｍ以下が好ましく、０．７～０．９μｍがより好ましい。前記表面粗さが下限値以上であれば、経済的なコーティングロール研磨仕上げが可能になる。前記表面粗さが上限値以下であれば、均一性に優れた塗膜外観が得られる。ここにおける表面粗さは、算術平均粗さＲａである。以下、同様である。
　前記表面粗さは、表面粗さ測定器（株式会社ミツトヨ製、製品名「ＳＪ－２１０」）により測定される。 The surface roughness of the coating roller 14 is preferably 1.2 μm or less, and more preferably 0.7 to 0.9 μm. If the surface roughness is at least the lower limit value, an economical coating roll polishing finish is possible. If the surface roughness is less than or equal to the upper limit value, a coating film appearance excellent in uniformity can be obtained. The surface roughness here is the arithmetic average roughness Ra. The same applies hereinafter.
The surface roughness is measured by a surface roughness measuring instrument (product name “SJ-210” manufactured by Mitutoyo Corporation).
（バックアップローラ）
　バックアップローラ１６とコーティングローラ１４との間に、搬送されている被塗布基板３０が挟み込まれる。バックアップローラ１６とコーティングローラ１４で被塗布基板３０を挟み込むことで、コーティングローラ１４の外周面１４ａと被塗布基板３０の表面３０ａとが充分に接触し、コーティングローラ１４の外周面１４ａに付着した薬液Ａが被塗布基板３０の表面３０ａに転写されて塗布される。
　搬送ローラ１８による被塗布基板３０の搬送方向（図１において、右方向）と、コーティングローラ１４の回転方向（図１において、左回転方向）とは、コーティングローラ１４と被塗布基板３０の接触点において互いに逆方向となっている。すなわち、ロールコーティング装置１は、リバースコート方式となっている。 (Backup roller)
The substrate to be coated 30 being transported is sandwiched between the backup roller 16 and the coating roller 14. By sandwiching the substrate to be coated 30 between the backup roller 16 and the coating roller 14, the outer peripheral surface 14 a of the coating roller 14 and the surface 30 a of the substrate to be coated 30 are sufficiently in contact with each other, and the chemical solution adhered to the outer peripheral surface 14 a of the coating roller 14. A is transferred to the surface 30a of the substrate to be coated 30 and applied.
The conveyance direction (right direction in FIG. 1) of the substrate 30 to be coated by the conveyance roller 18 and the rotation direction (left rotation direction in FIG. 1) of the coating roller 14 are the contact points of the coating roller 14 and the substrate 30 to be coated. Are in opposite directions. That is, the roll coating apparatus 1 is a reverse coating method.
　コーティングローラ１４とバックアップローラ１６の間隔は、被塗布基板３０の厚みより０．１～１．０ｍｍ小さいことが好ましく、０．２～０．４ｍｍ小さいことがより好ましい。
　バックアップローラ１６の長さは、コーティングローラ１４よりも短いことが好ましい。これにより、たとえドクターローラ１２およびコーティングローラ１４の側端側から薬液Ａが漏れたとしても、バックアップローラ１６が薬液Ａで汚れ難くなる。 The distance between the coating roller 14 and the backup roller 16 is preferably 0.1 to 1.0 mm smaller than the thickness of the substrate 30 to be coated, and more preferably 0.2 to 0.4 mm smaller.
The length of the backup roller 16 is preferably shorter than the coating roller 14. Thereby, even if the chemical solution A leaks from the side end sides of the doctor roller 12 and the coating roller 14, the backup roller 16 is hardly contaminated with the chemical solution A.
　バックアップローラ１６の材質としては、耐溶剤性のゴムが好ましい。
　バックアップローラ１６を形成するゴムの硬度は、４０～８０度が好ましく、５０～７０度がより好ましい。前記硬度が下限値以上であれば、コーティングローラへの被塗布基板の接触が均一になる。前記硬度が上限値以下であれば、被塗布基板の反りを吸収する効果があり、ローラへの被塗布基板の進入が容易になる。
　搬送ローラ１８としては、公知の搬送ローラを特に制限無く採用できる。 As a material of the backup roller 16, a solvent resistant rubber is preferable.
The hardness of the rubber forming the backup roller 16 is preferably 40 to 80 degrees, more preferably 50 to 70 degrees. When the hardness is equal to or higher than the lower limit, the contact of the substrate to be coated with the coating roller becomes uniform. If the hardness is less than or equal to the upper limit value, there is an effect of absorbing warpage of the substrate to be coated, and it becomes easy for the substrate to be coated to enter the roller.
As the transport roller 18, a known transport roller can be used without any particular limitation.
（液漏れ防止板）
　液漏れ防止板２０の前記ドクターローラ側は、ドクターローラ１２の外周面１２ａに沿うように凹状に湾曲した側端面２０ａを有している。２つの液漏れ防止板２０の各々の側端面２０ａは、ドクターローラ１２における側端部の外周面１２ａに押し付けられている。
　前記した２つの液漏れ防止板のコーティングローラ１４側であって、側端面２０ａと反対側に位置する部分の各々の側面２０ｂは、それぞれ、前記コーティングローラ１４の側端面１４ｃに押し付けられている。 (Liquid leakage prevention plate)
The doctor roller side of the liquid leakage prevention plate 20 has a side end surface 20 a that is curved in a concave shape so as to follow the outer peripheral surface 12 a of the doctor roller 12. The side end surfaces 20 a of the two liquid leakage prevention plates 20 are pressed against the outer peripheral surface 12 a of the side end portion of the doctor roller 12.
The side surfaces 20b of the two liquid leakage prevention plates on the side of the coating roller 14 opposite to the side end surface 20a are pressed against the side end surface 14c of the coating roller 14, respectively.
　このように、それぞれの液漏れ防止板２０は、側端面２０ａをドクターローラ１２の外周面１２ａと接触させ、第１の面２０ｂをコーティングローラ１４の側端面１４ｃと接触させるようにして設けられている。
　コーティングローラ１４の両端側に、前記のように液漏れ防止板２０が設けられることで、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとが接触している部分に溜められる薬液Ａが、ドクターローラ１２およびコーティングローラ１４の軸方向の側端側から漏れることが抑制される。 As described above, each liquid leakage prevention plate 20 is provided such that the side end surface 20a is in contact with the outer peripheral surface 12a of the doctor roller 12, and the first surface 20b is in contact with the side end surface 14c of the coating roller 14. Yes.
By providing the liquid leakage prevention plates 20 on both ends of the coating roller 14 as described above, the chemical solution A stored in the portion where the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 are in contact with each other. However, leakage from the side ends of the doctor roller 12 and the coating roller 14 in the axial direction is suppressed.
　また、液漏れ防止板２０におけるコーティングローラ１４の側端面１４ｃに押し付けられる側の側面２０ｂに隣接する側端面２０ｃは、コーティングローラ１４の側端面１４ｃの周縁に沿って凹状に湾曲している部分を有している。これにより、コーティングローラ１４の側端面１４ｃと液漏れ防止板２０の第１の面２０ｂとの接触面積が小さくなり、コーティングローラ１４を回転させる際の抵抗が小さくなる。 Further, the side end surface 20c adjacent to the side surface 20b of the liquid leakage prevention plate 20 that is pressed against the side end surface 14c of the coating roller 14 is a concavely curved portion along the peripheral edge of the side end surface 14c of the coating roller 14. Have. Thereby, the contact area between the side end surface 14c of the coating roller 14 and the first surface 20b of the liquid leakage preventing plate 20 is reduced, and the resistance when the coating roller 14 is rotated is reduced.
　また、液漏れ防止板２０には、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとの接触部分に溜められた薬液Ａを必要に応じて排出するために、配管等を接続する排出部を設けてもよい。 In addition, a pipe or the like is connected to the liquid leakage prevention plate 20 in order to discharge the chemical solution A stored in the contact portion between the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 as necessary. A discharge part may be provided.
　液漏れ防止板２０の材質としては、ドクターローラ１２の外周面１２ａとの接触部分、およびコーティングローラ１４の側端面１４ｃとの接触部分からの薬液Ａの漏れを防止できる材質であればよく、例えば、ポリアセタール等が挙げられる。 The material of the liquid leakage prevention plate 20 may be any material that can prevent leakage of the chemical liquid A from the contact portion with the outer peripheral surface 12a of the doctor roller 12 and the contact portion with the side end surface 14c of the coating roller 14, for example, And polyacetal.
（スリット形成板、薬液供給ノズル）
　ドクターローラ１２の最頂ライン１２ｂよりもコーティングローラ１４側における、ドクターローラ１２の外周面１２ａとスリット形成板２４の間にスリット３２が形成される。
　薬液供給ノズル２２から、ドクターローラ１２の外周面１２ａにおける最頂ライン１２ｂとスリット形成板２４との間に供給された薬液Ａは、スリット３２を通って、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとが接触した部分に溜められる。これにより、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとが接触した部分において、薬液Ａが波立つことが抑制される。そのため、被塗布基板３０の表面３０ａに均一な塗膜を形成しやすくなる。 (Slit forming plate, chemical supply nozzle)
A slit 32 is formed between the outer peripheral surface 12 a of the doctor roller 12 and the slit forming plate 24 on the coating roller 14 side of the topmost line 12 b of the doctor roller 12.
The chemical solution A supplied from the chemical solution supply nozzle 22 between the top line 12b and the slit forming plate 24 on the outer peripheral surface 12a of the doctor roller 12 passes through the slit 32, and the outer peripheral surface 12a of the doctor roller 12 and the coating roller. 14 is accumulated in a portion in contact with the outer peripheral surface 14a. Thereby, it is suppressed that the chemical | medical solution A swells in the part which the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 contacted. Therefore, it becomes easy to form a uniform coating film on the surface 30a of the substrate 30 to be coated.
　また、ロールコーティング装置１では、スリット形成板２４と、スリット形成板２４の両側に位置する２つの液漏れ防止板２０との間には隙間が存在している。ドクターローラ１２の外周面１２ａにおける最頂ライン１２ｂとスリット形成板２４との間に供給された薬液Ａは、該隙間からも流下するが、該隙間は被塗布基板３０の幅よりも外側にあるので問題は生じない。 Further, in the roll coating apparatus 1, there is a gap between the slit forming plate 24 and the two liquid leakage preventing plates 20 located on both sides of the slit forming plate 24. The chemical solution A supplied between the topmost line 12b and the slit forming plate 24 on the outer peripheral surface 12a of the doctor roller 12 also flows down from the gap, but the gap is outside the width of the substrate 30 to be coated. So no problem arises.
　スリット３２の幅は、薬液Ａの粘度にもよるが、０～０．４ｍｍが好ましく、０～０．１ｍｍがより好ましい。 The width of the slit 32 is preferably 0 to 0.4 mm, more preferably 0 to 0.1 mm, although it depends on the viscosity of the chemical solution A.
　薬液供給ノズル２２としては、公知の液供給ノズルを特に制限無く採用できる。
　スリット形成板２４としては、ドクターローラ１２の外周面１２ａとスリット形成板２４の間に所定の間隔のスリット３２を形成できるものであれば特に限定されない。スリット形成板２４としては、例えば、ドクターブレード、ロールバー、スキージ等を使用できる。 As the chemical liquid supply nozzle 22, a known liquid supply nozzle can be employed without any particular limitation.
The slit forming plate 24 is not particularly limited as long as slits 32 having a predetermined interval can be formed between the outer peripheral surface 12 a of the doctor roller 12 and the slit forming plate 24. As the slit forming plate 24, for example, a doctor blade, a roll bar, a squeegee or the like can be used.
（ドクターブレード、廃液受け皿）
　ドクターブレード２６は、コーティングローラ１４の外周面１４ａの回転方向に沿うように傾斜して設けられている。また、ドクターブレード２６の先端は、コーティングローラ１４の最頂ライン１４ｂよりもドクターローラ１２側における、コーティングローラ１４の外周面１４ａに接している。被塗布基板３０の表面３０ａとの接触後にコーティングローラ１４の外周面１４ａに残存している薬液Ａは、ドクターブレード２６によって掻き取られる。
　ドクターブレード２６の軸方向の長さはコーティングローラ１４の軸方向の長さよりも長く、ドクターブレード２６の両端部２６ａ，２６ｂがコーティングローラ１４からはみ出しているので、掻き取られた薬液Ａはコーティングローラ１４の両方の側端面１４ｃ，１４ｃ側から流れ落ち、廃液受け皿２８に回収される。廃液受け皿２８には、廃液を排出するための配管が接続される（不図示）。 (Doctor blade, waste pan)
The doctor blade 26 is provided so as to be inclined along the rotation direction of the outer peripheral surface 14 a of the coating roller 14. The distal end of the doctor blade 26 is in contact with the outer peripheral surface 14 a of the coating roller 14 on the doctor roller 12 side with respect to the top line 14 b of the coating roller 14. The chemical solution A remaining on the outer peripheral surface 14 a of the coating roller 14 after contact with the surface 30 a of the substrate to be coated 30 is scraped off by the doctor blade 26.
The length of the doctor blade 26 in the axial direction is longer than the length of the coating roller 14 in the axial direction, and both end portions 26a, 26b of the doctor blade 26 protrude from the coating roller 14, so that the scraped chemical solution A is applied to the coating roller. 14 flows down from both side end faces 14c and 14c and is collected in the waste liquid tray 28. A pipe for discharging the waste liquid is connected to the waste liquid receiving tray 28 (not shown).
　ドクターブレード２６の材質および形状は特に限定されず、公知のドクターブレードを採用できる。
　ドクターブレード２６は、０．０１～０．２０Ｎ／ｍｍの押し付け力でコーティングローラ１４の外周面１４ａに押し付けられていることが好ましい。前記押し付け力が下限値以上であれば、被塗布基板３０の表面３０ａとの接触後にコーティングローラ１４の外周面１４ａに残存している薬液Ａを充分に掻き取って廃液として回収でき、均一な塗膜を形成できる。前記押し付け力が上限値以下であれば、コーティングローラ１４の外周面１４ａの摩耗を抑制しやすい。
　前記押し付け力は、０．０５～０．１５Ｎ／ｍｍがより好ましく、０．０８～０．１２Ｎ／ｍｍが特に好ましい。 The material and shape of the doctor blade 26 are not particularly limited, and a known doctor blade can be employed.
The doctor blade 26 is preferably pressed against the outer peripheral surface 14a of the coating roller 14 with a pressing force of 0.01 to 0.20 N / mm. If the pressing force is equal to or greater than the lower limit value, the chemical solution A remaining on the outer peripheral surface 14a of the coating roller 14 after contact with the surface 30a of the substrate to be coated 30 can be sufficiently scraped off and recovered as a waste solution. A film can be formed. If the pressing force is less than or equal to the upper limit value, it is easy to suppress wear of the outer peripheral surface 14a of the coating roller 14.
The pressing force is more preferably 0.05 to 0.15 N / mm, and particularly preferably 0.08 to 0.12 N / mm.
　また、ドクターブレード２６のコーティングローラ１４への押し付けは、押し付け力以外にも、押し付け量でも規定が可能である。押し付け量とは、コーティングローラ１４の外周面１４ａにおけるドクターブレード２６が押し付けられて凹んだ部分の最大深さを意味する。ドクターブレード２６の押し付け量は、０．５～１．２ｍｍがより好ましく、０．７～１．０ｍｍが特に好ましい。 Further, the pressing of the doctor blade 26 to the coating roller 14 can be defined by the pressing amount in addition to the pressing force. The pressing amount means the maximum depth of the concave portion of the outer peripheral surface 14a of the coating roller 14 that is pressed by the doctor blade 26. The pressing amount of the doctor blade 26 is more preferably 0.5 to 1.2 mm, and particularly preferably 0.7 to 1.0 mm.
　ドクターブレード２６の先端をコーティングローラ１４の外周面１４ａに押し付ける部材としては、上下方向に沿ってドクターブレード２６をコーティングローラ１４の外周面１４ａに押し付ける押圧機構と、水平方向に沿ってドクターブレード２６をコーティングローラ１４の外周面１４ａに押し付ける押圧機構とを備えた押し付け部材が好ましい。該押し付け部材を用いる場合は、上下方向と水平方向の両方の押し付け力を前記範囲内にすることが好ましい。
　また、押し付け部材によるドクターブレード２６の押圧は、ドクターブレード２６の長さ方向に沿った３箇所以上の部分をそれぞれ独立に押圧できるようになっていることが好ましい。なかでも、少なくともドクターブレード２６の両端部２６ａ，２６ｂと、ドクターブレード２６の中央部２６ｃの３箇所をそれぞれ独立に押圧できるようになっていることが好ましい。例えば、ドクターブレード２６の両端部２６ａ，２６ｂと、ドクターブレード２６の中央部２６ｃの３箇所に、それぞれ独立に３つの押し付け部材を設ける形態等が挙げられる。これにより、コーティングローラ１４の外周面１４ａに対するドクターブレード２６の押し付け力をより精密に制御でき、被塗布基板３０の表面３０ａに均一な塗膜を形成することが容易になる。 As a member that presses the tip of the doctor blade 26 against the outer peripheral surface 14a of the coating roller 14, a pressing mechanism that presses the doctor blade 26 against the outer peripheral surface 14a of the coating roller 14 along the vertical direction, and a doctor blade 26 along the horizontal direction. A pressing member provided with a pressing mechanism that presses against the outer peripheral surface 14a of the coating roller 14 is preferable. When the pressing member is used, it is preferable that both the vertical and horizontal pressing forces are within the above range.
In addition, it is preferable that the doctor blade 26 is pressed by the pressing member so that three or more portions along the length direction of the doctor blade 26 can be independently pressed. In particular, it is preferable that at least three ends of the doctor blade 26, that is, both end portions 26a and 26b and the center portion 26c of the doctor blade 26 can be independently pressed. For example, there may be mentioned a configuration in which three pressing members are provided independently at three locations of both end portions 26a and 26b of the doctor blade 26 and the central portion 26c of the doctor blade 26, respectively. Thereby, the pressing force of the doctor blade 26 against the outer peripheral surface 14a of the coating roller 14 can be controlled more precisely, and it becomes easy to form a uniform coating film on the surface 30a of the substrate 30 to be coated.
　ロールコーティング装置１に用いる薬液Ａは、特に限定されず、塗料インク等が挙げられる。
　被塗布基板３０としては、特に限定されず、ガラス板、樹脂板、金属板等が挙げられる。 The chemical liquid A used for the roll coating apparatus 1 is not particularly limited, and examples thereof include paint ink.
The substrate to be coated 30 is not particularly limited, and examples thereof include a glass plate, a resin plate, and a metal plate.
（作用効果）
　ロールコーティング装置１では、薬液供給ノズル２２から、ドクターローラ１２の外周面１２ａにおける最頂ライン１２ｂとスリット形成板２４の間に薬液Ａが供給される。供給された薬液Ａは、ドクターローラ１２の外周面１２ａとスリット形成板２４との間のスリット３２を通って、ドクターローラ１２の外周面１２ａとコーティングローラ１４の外周面１４ａとが接触している部分に溜められる。該部分に溜められた薬液Ａは、液漏れ防止板２０によって、ドクターローラ１２およびコーティングローラ１４の両端側から漏れることが抑制されている。ドクターローラ１２とコーティングローラ１４は互いに回転しており、薬液Ａが溜められた部分を通過したコーティングローラ１４の外周面１４ａに薬液Ａが付着する。 (Function and effect)
In the roll coating apparatus 1, the chemical solution A is supplied from the chemical solution supply nozzle 22 between the top line 12 b and the slit forming plate 24 on the outer peripheral surface 12 a of the doctor roller 12. The supplied chemical solution A passes through the slit 32 between the outer peripheral surface 12a of the doctor roller 12 and the slit forming plate 24, and the outer peripheral surface 12a of the doctor roller 12 and the outer peripheral surface 14a of the coating roller 14 are in contact with each other. Accumulated in the part. The chemical liquid A stored in the portion is prevented from leaking from both end sides of the doctor roller 12 and the coating roller 14 by the liquid leakage prevention plate 20. The doctor roller 12 and the coating roller 14 rotate with each other, and the chemical solution A adheres to the outer peripheral surface 14a of the coating roller 14 that has passed through the portion where the chemical solution A is stored.
　特許文献１のような、液漏れ防止板の第１の面をドクターローラの側端面とコーティングローラの側端面の両方に押し付ける従来のロールコーティング装置では、ドクターローラとコーティングローラの材質の違いから、ドクターローラの摩耗速度と、コーティングローラの摩耗速度に差がある。具体的には、ゴム製のコーティングローラの摩耗速度は、金属製のドクターローラの摩耗速度よりも速い。そのため、従来のロールコーティング装置では、摩耗によってゴム製のコーティングローラの側端面と液漏れ防止板との間に隙間ができやすく、該隙間から薬液が漏れやすい。
　これに対して、本発明のロールコーティング装置１では、液漏れ防止板２０は、ドクターローラ１２の外周面１２ａと、コーティングローラ１４の側端面１４ｃとに、それぞれ別々の面が押し付けられている。ドクターローラ１２の外周面１２ａに液漏れ防止板２０の側端面２０ａを押し付ける力と、コーティングローラ１４の側端面１４ｃに液漏れ防止板２０のコーティングローラ１４側の側面２０ｂを押し付ける力とは、それぞれ方向が異なるため独立して調節できる。そのため、ドクターローラ１２の摩耗は、液漏れ防止板２０のコーティングローラ１４側の側面２０ｂとコーティングローラ１４の側端面１４ｃとの密着性に影響しない。また、コーティングローラ１４の摩耗は、液漏れ防止板２０の側端面２０ａとドクターローラ１２の外周面１２ａとの密着性に影響しない。このように、ドクターローラ１２とコーティングローラ１４とが異なる速度で摩耗したとしても、液漏れ防止板２０のコーティングローラ１４側の側面２０ｂとコーティングローラ１４の側端面１４ｃとの密着性と、液漏れ防止板２０の側端面２０ａとドクターローラ１２の外周面１２ａとの密着性とを充分に維持できる。よって、液漏れ防止板２０とドクターローラ１２の接触部分、および液漏れ防止板２０とコーティングローラ１４の接触部分のいずれにおいても薬液Ａが漏れることが充分に抑制される。 In the conventional roll coating apparatus that presses the first surface of the liquid leakage preventing plate on both the side end surface of the doctor roller and the side end surface of the coating roller as in Patent Document 1, due to the difference in the material of the doctor roller and the coating roller, There is a difference between the wear rate of the doctor roller and the wear rate of the coating roller. Specifically, the wear rate of the rubber coating roller is faster than the wear rate of the metal doctor roller. Therefore, in the conventional roll coating apparatus, a gap is easily formed between the side end surface of the rubber coating roller and the liquid leakage prevention plate due to wear, and the chemical liquid is liable to leak from the gap.
On the other hand, in the roll coating apparatus 1 of the present invention, the liquid leakage prevention plate 20 is pressed against the outer peripheral surface 12a of the doctor roller 12 and the side end surface 14c of the coating roller 14 respectively. The force for pressing the side end surface 20a of the liquid leakage prevention plate 20 against the outer peripheral surface 12a of the doctor roller 12 and the force for pressing the side surface 20b of the liquid leakage prevention plate 20 on the coating roller 14 side against the side end surface 14c of the coating roller 14 are respectively Since the direction is different, it can be adjusted independently. Therefore, the wear of the doctor roller 12 does not affect the adhesion between the side surface 20 b of the liquid leakage prevention plate 20 on the coating roller 14 side and the side end surface 14 c of the coating roller 14. Further, the wear of the coating roller 14 does not affect the adhesion between the side end surface 20 a of the liquid leakage prevention plate 20 and the outer peripheral surface 12 a of the doctor roller 12. Thus, even if the doctor roller 12 and the coating roller 14 are worn at different speeds, the adhesion between the side surface 20b on the coating roller 14 side of the liquid leakage prevention plate 20 and the side end surface 14c of the coating roller 14, and the liquid leakage Adhesiveness between the side end surface 20a of the prevention plate 20 and the outer peripheral surface 12a of the doctor roller 12 can be sufficiently maintained. Therefore, the chemical liquid A is sufficiently suppressed from leaking at any of the contact portion between the liquid leakage prevention plate 20 and the doctor roller 12 and the contact portion between the liquid leakage prevention plate 20 and the coating roller 14.
　また、ロールコーティング装置１では、搬送ローラ１８によって、被塗布基板３０が、コーティングローラ１４とバックアップローラ１６の間に挟み込まれるようにして、コーティングローラ１４の回転方向と反対方向に搬送されている。被塗布基板３０がコーティングローラ１４とバックアップローラ１６に挟み込まれる部分において、薬液Ａが付着したコーティングローラ１４の外周面１４ａが被塗布基板３０の表面３０ａと接触し、コーティングローラ１４の外周面１４ａから被塗布基板３０の表面３０ａに薬液Ａが転写され、薬液Ａの塗布が行われる。 In the roll coating apparatus 1, the substrate to be coated 30 is transported in the direction opposite to the rotation direction of the coating roller 14 by the transport roller 18 so as to be sandwiched between the coating roller 14 and the backup roller 16. In the portion where the substrate to be coated 30 is sandwiched between the coating roller 14 and the backup roller 16, the outer peripheral surface 14 a of the coating roller 14 to which the chemical liquid A adheres contacts the surface 30 a of the substrate to be coated 30, and from the outer peripheral surface 14 a of the coating roller 14. The chemical liquid A is transferred to the surface 30a of the substrate to be coated 30, and the chemical liquid A is applied.
　被塗布基板３０と接触した後にコーティングローラ１４の外周面１４ａに残存している薬液Ａは、ドクターブレード２６によって掻き取られ、廃液受け皿２８に回収される。コーティングローラ１４の外周面１４ａに付着した状態の薬液Ａにおいては、溶媒が蒸発しやすく、薬液Ａの固形分濃度が上昇しやすい。コーティングローラ１４の外周面１４ａ上で固形分濃度が上昇した薬液Ａが再度被塗布基板３０への塗布に用いられると、被塗布基板３０の表面３０ａに形成される塗膜が不均一になるおそれがある。ドクターブレード２６によってコーティングローラ１４の外周面１４ａに残存している薬液Ａを掻き取って廃液として回収することで、被塗布基板３０の表面３０ａに均一な塗膜を形成することが容易になる。 The chemical liquid A remaining on the outer peripheral surface 14 a of the coating roller 14 after coming into contact with the substrate to be coated 30 is scraped off by the doctor blade 26 and collected in the waste liquid tray 28. In the chemical solution A attached to the outer peripheral surface 14a of the coating roller 14, the solvent is easily evaporated, and the solid content concentration of the chemical solution A is likely to increase. If the chemical liquid A having a solid content concentration increased on the outer peripheral surface 14a of the coating roller 14 is used again for application to the substrate 30 to be coated, the coating film formed on the surface 30a of the substrate 30 to be coated may be non-uniform. There is. The doctor blade 26 scrapes off the chemical liquid A remaining on the outer peripheral surface 14a of the coating roller 14 and collects it as waste liquid, so that it becomes easy to form a uniform coating film on the surface 30a of the substrate 30 to be coated.
　以上説明した本発明のロールコーティング装置にあっては、液漏れ防止板の別々の面がドクターローラとコーティングローラにそれぞれ押し付けられているため、液漏れ防止板におけるドクターローラに押し付けられた部分とコーティングローラに押し付けられた接触部分のいずれにも隙間が生じ難く、薬液の漏れが抑制される。そのため、ドクターローラおよびコーティングローラの下に位置する被塗布基板、バックアップローラ等が汚染されることが抑制され、また薬液の浪費も抑制される。 In the roll coating apparatus of the present invention described above, since the separate surfaces of the liquid leakage prevention plate are pressed against the doctor roller and the coating roller, respectively, the portion pressed against the doctor roller and the coating on the liquid leakage prevention plate A gap is hardly generated in any of the contact parts pressed against the roller, and leakage of the chemical liquid is suppressed. Therefore, contamination of the substrate to be coated, the backup roller and the like located under the doctor roller and the coating roller is suppressed, and the waste of the chemical solution is also suppressed.
　なお、本発明のロールコーティング装置は、前記したロールコーティング装置１には限定されない。
　例えば、本発明のロールコーティング装置は、スリット形成板を有していなくてもよい。また、本発明のロールコーティング装置は、ドクターブレードおよび廃液受け皿を有していなくてもよい。
　また、搬送ロールの数は３個以下でもよく、５個以上でもよい。また、搬送ロールの代わりにベルトコンベアで被塗布基板を搬送するようにしてもよい。 The roll coating apparatus of the present invention is not limited to the roll coating apparatus 1 described above.
For example, the roll coating apparatus of the present invention may not have a slit forming plate. Moreover, the roll coating apparatus of this invention does not need to have a doctor blade and a waste-liquid tray.
Further, the number of transport rolls may be 3 or less, or 5 or more. Moreover, you may make it convey a to-be-coated substrate with a belt conveyor instead of a conveyance roll.
　本発明のロールコーティング装置によれば、ドクターローラおよびコーティングローラの外周面同士が接触されている部分に溜められている薬液が、ドクターローラおよびコーティングローラの軸方向の側端側から漏れるのを可及的に少なくすることができ、薬液の無駄をなくし、コスト低減に寄与することができる。
　なお、２０１２年１０月１１日に出願された日本特許出願２０１２－２２５７７３号の明細書、特許請求の範囲、図面および要約書の全内容をここに引用し、本発明の開示として取り入れるものである。 According to the roll coating apparatus of the present invention, it is possible for the chemical liquid stored in the portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other to leak from the side end sides in the axial direction of the doctor roller and the coating roller. It can be reduced as much as possible, the waste of the chemical solution can be eliminated, and the cost can be reduced.
The entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2012-225773 filed on October 11, 2012 are incorporated herein as the disclosure of the present invention. .
　１・・・ロールコーティング装置、１２・・・ドクターローラ、１２ａ・・・外周面、１２ｂ・・・最頂ライン、１４・・・コーティングローラ、１４ａ・・・外周面、１４ｂ・・・最頂ライン、１４ｃ・・・側端面、１６・・・バックアップローラ、１８・・・搬送ローラ、２０・・・液漏れ防止板、２０ａ・・・側端面、２０ｂ・・・側面、２２・・・薬液供給ノズル、２４・・・スリット形成板、２６・・・ドクターブレード、２８・・・廃液受け皿、３０・・・被塗布基板、３２・・・スリット。 DESCRIPTION OF SYMBOLS 1 ... Roll coating apparatus, 12 ... Doctor roller, 12a ... Outer peripheral surface, 12b ... Top line, 14 ... Coating roller, 14a ... Outer surface, 14b ... Top Line, 14c ... side end face, 16 ... backup roller, 18 ... transport roller, 20 ... liquid leakage prevention plate, 20a ... side end face, 20b ... side face, 22 ... chemical liquid Supply nozzle, 24 ... slit forming plate, 26 ... doctor blade, 28 ... waste liquid tray, 30 ... substrate to be coated, 32 ... slit.

Claims (4)

  1. 　互いの外周面同士が接触した状態で反対の回転方向に回転するドクターローラおよびコーティングローラと、
    　前記コーティングローラとの間に搬送される被塗布基板を挟み込むように設けられたバックアップローラと、
    　前記コーティングローラとドクターローラの軸方向の両端側のそれぞれの間に設けられた２つの液漏れ防止板と、を有し、
    　前記ドクターローラの長さが前記コーティングローラの長さよりも長くなっており、
    　前記２つの液漏れ防止板の前記ドクターローラ側は、それぞれ、前記ドクターローラの外周面に沿うように凹状に湾曲した側端面を有し、
    　前記２つの液漏れ防止板のコーティングローラ側は、それぞれ、前記コーティングローラの側端面に押し付けられる側面を有し、
    　かつ、前記した２つの液漏れ防止板の各々の前記凹状に湾曲した側端面は、前記したドクターローラの外周面に押し付けられており、一方、前記した２つの液漏れ防止板の各々の前記した側面は、前記コーティングローラの側端面に押し付けられており、
    　前記ドクターローラと前記コーティングローラの外周面同士が接触した部分に薬液が溜められ、前記コーティングローラの外周面に付着した前記薬液が、該外周面と接触する前記被塗布基板の表面に塗布されるロールコーティング装置。     A doctor roller and a coating roller that rotate in opposite rotation directions with their outer peripheral surfaces in contact with each other;
    A backup roller provided so as to sandwich the substrate to be conveyed conveyed between the coating roller;
    Two liquid leakage prevention plates provided between both ends in the axial direction of the coating roller and the doctor roller,
    The length of the doctor roller is longer than the length of the coating roller,
    The doctor roller sides of the two liquid leakage prevention plates each have a side end surface curved in a concave shape so as to follow the outer peripheral surface of the doctor roller,
    The coating roller sides of the two liquid leakage prevention plates each have a side surface pressed against the side end surface of the coating roller,
    In addition, the concavely curved side end surfaces of each of the two liquid leakage prevention plates described above are pressed against the outer peripheral surface of the doctor roller, while each of the two liquid leakage prevention plates described above. The side surface is pressed against the side end surface of the coating roller,
    A chemical solution is accumulated in a portion where the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other, and the chemical solution attached to the outer peripheral surface of the coating roller is applied to the surface of the substrate to be applied that is in contact with the outer peripheral surface. Roll coating equipment.
  2. 　さらに、前記ドクターローラの最も高い位置である最頂ラインよりも前記コーティングローラ側に、前記ドクターローラの軸方向に沿って設けられたスリット形成板を有し、
    　前記スリット形成板と前記ドクターローラの外周面との間にスリットが形成され、
    　前記ドクターローラの外周面における前記最頂ラインと前記スリット形成板との間に前記薬液が供給され、該薬液が前記スリットを通って、前記ドクターローラと前記コーティングローラの外周面同士が接触した部分に溜められる、請求項１に記載のロールコーティング装置。     Furthermore, it has a slit forming plate provided along the axial direction of the doctor roller on the coating roller side from the top line which is the highest position of the doctor roller,
    A slit is formed between the slit forming plate and the outer peripheral surface of the doctor roller,
    A portion where the chemical liquid is supplied between the topmost line on the outer peripheral surface of the doctor roller and the slit forming plate, the chemical liquid passes through the slit, and the outer peripheral surfaces of the doctor roller and the coating roller are in contact with each other. The roll coating apparatus according to claim 1, wherein the roll coating apparatus is stored in the apparatus.
  3. 　さらに、前記コーティングローラの最も高い位置である最頂ラインよりも前記ドクターローラ側に、前記コーティングローラの軸方向に沿って、前記コーティングローラの外周面に接するドクターブレードが設けられている、請求項１または２に記載のロールコーティング装置。 Further, a doctor blade that is in contact with the outer peripheral surface of the coating roller along the axial direction of the coating roller is provided closer to the doctor roller than the topmost line that is the highest position of the coating roller. The roll coating apparatus according to 1 or 2.
  4. 　前記ドクターブレードの両端部が前記コーティングローラからはみ出しており、
    　前記コーティングローラの両方の側端面側における前記ドクターブレードのはみ出した部分の下側に、前記ドクターブレードによって前記コーティングローラの外周面から掻き取られた薬液が溜まる廃液受け皿が設けられている、請求項１～３のいずれか一項に記載のロールコーティング装置。     Both end portions of the doctor blade protrude from the coating roller,
    The waste liquid receiving tray in which the chemical liquid scraped off from the outer peripheral surface of the coating roller by the doctor blade is provided below the protruding portion of the doctor blade on both side end surfaces of the coating roller. The roll coating apparatus according to any one of 1 to 3.
PCT/JP2013/077616 2012-10-11 2013-10-10 Roll coating device WO2014058020A1 (en)

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CN104437959A (en) * 2014-10-31 2015-03-25 合肥鼎雅家具有限责任公司 Oil paint roll-painting device
CN104829142A (en) * 2015-05-14 2015-08-12 海南中航特玻科技有限公司 Belt joint automatic-avoiding device of AR film coating roller coater
CN115155938A (en) * 2022-08-01 2022-10-11 青岛国华木业有限公司 Painting device for UV paint of plate

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KR102432971B1 (en) * 2020-03-11 2022-08-17 카부시키가이샤 미야코 롤러 코교 Coating apparatus

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CN104437959A (en) * 2014-10-31 2015-03-25 合肥鼎雅家具有限责任公司 Oil paint roll-painting device
CN104829142A (en) * 2015-05-14 2015-08-12 海南中航特玻科技有限公司 Belt joint automatic-avoiding device of AR film coating roller coater
CN115155938A (en) * 2022-08-01 2022-10-11 青岛国华木业有限公司 Painting device for UV paint of plate

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