EP0757597B1 - Düsenbeschichtungsverfahren und vorrichtung - Google Patents

Düsenbeschichtungsverfahren und vorrichtung Download PDF

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Publication number
EP0757597B1
EP0757597B1 EP95914074A EP95914074A EP0757597B1 EP 0757597 B1 EP0757597 B1 EP 0757597B1 EP 95914074 A EP95914074 A EP 95914074A EP 95914074 A EP95914074 A EP 95914074A EP 0757597 B1 EP0757597 B1 EP 0757597B1
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EP
European Patent Office
Prior art keywords
land
coating
die
downstream
vacuum
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
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EP95914074A
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English (en)
French (fr)
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EP0757597A1 (de
Inventor
Omar D. Brown
Gary W. Maier
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3M Co
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Minnesota Mining and Manufacturing Co
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Publication date
Priority claimed from US08/236,570 external-priority patent/US5759274A/en
Priority claimed from US08/236,635 external-priority patent/US5639305A/en
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0757597A1 publication Critical patent/EP0757597A1/de
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Publication of EP0757597B1 publication Critical patent/EP0757597B1/de
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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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades

Definitions

  • the present invention relates to coating methods. More particularly, the present invention relates to coating methods using a die.
  • U.S. Patent No. 2,681,294 discloses a vacuum method for stabilizing the coating bead for direct extrusion and slide types of metered coating system. Such stabilization enhances the coating capability of these systems.
  • these coating systems lack sufficient overall capability to provide the thin wet layers, even at very low liquid viscosities, required for some coated products.
  • U.S. Patent No. 2,761,791 teaches using various forms of extrusion and slide coaters to bead-coat multiple liquids simultaneously in a distinct layer relationship onto a moving web.
  • these coating systems lack sufficient overall performance to maintain the desired multiple wet layer thickness at the needed web speeds and coating gaps, for some coated products.
  • U.S. Patent No. 5,256,357 discloses a multiple layer coating die with an underbite in one of the slot edges. Underbite in one of the two edges improves the coating situation in some cases.
  • U.S. Patent No. 4,445,458 discloses an extrusion type bead-coating die with a beveled draw-down surface to impose a boundary force on the downstream side of the coating bead and to reduce the amount of vacuum necessary to maintain the bead. Reduction of the vacuum minimizes chatter defects and coating streaks. To improve coating quality, the obtuse angle of the beveled surface with respect to volatile solvent.
  • One solution to this problem, described in PCT Patent Application No. WO 93/14878 involves placing fluorine-containing resin coverings on the die faces adjacent to the lip faces to prevent wetting of these surfaces by coating liquid. This reduces streaking, dripping, and edge waviness. However, the coverings extend to the bead lip edges, and result in non-precision mechanical alignment components which are easily damaged.
  • EP 552653 describes covering a slide coating die surface adjacent to and below the coating bead with a low energy fluorinated polyethylene surface.
  • the covering starts 0.05-5.00 mm below the coating lip tip and extends away from the coating bead.
  • the low-surface-energy covering is separated from the coating lip tip by a bare metal strip. This locates the bead static contact line.
  • the low energy covering eliminates coating streaks and facilitates die cleanup. No mention is made of using this with an extrusion coating die.
  • Figure 1 shows a known coating die 10 with a vacuum chamber 12 as part of a metered coating system.
  • a coating liquid 14 is precisely supplied by a pump 16 to the die 10 for application to a moving web 18, supported by a backup roller 20.
  • Coating liquid is supplied through a channel 22 to a manifold 24 for distribution through a slot 26 in the die and coating onto the moving web 18.
  • the coating liquid passes through the slot 26 and forms a continuous coating bead 28 between the upstream die lip 30 and the downstream die lip 32, and the web 18.
  • Dimensions f 1 and f 2 , the width of the lips 30, 32 commonly range from 0.25 to 0.76 mm.
  • the vacuum chamber 12 applies a vacuum upstream of the bead to stabilize the bead. While this configuration works adequately in many situations, there is a need for a die coating method which improves the performance of known methods.
  • GB-A-2 120 132 discloses a die coating apparatus according to the preamble of claim 1 and a method of die coating according to the preamble of claim 13.
  • the present invention relates to a die coating apparatus and a method of die coating of fluid coating onto a surface according to the claims.
  • the shape of the land conforms to the shape of the surface being coated. Where the surface is curved, the land is curved.
  • the die also can include applying a vacuum upstream of the bead to stabilize the bead.
  • the vacuum can be applied using a vacuum chamber having a vacuum bar with a land.
  • the shape of the vacuum land also conforms to the shape of the surface being coated.
  • the land and the vacuum land can have the same radius of curvature and can have the same or different convergences with respect to the surface to be coated.
  • a replaceable, flexible strip can be clamped between two downstream bars above the coating slot to facilitate replacement of a damaged overbite edge.
  • the strip can be held in position by vacuum applied through the downstream bar.
  • the method of die coating according to this invention includes passing coating fluid through a slot; improving coating performance by changing at least one of the relative orientations of the land and the sharp edge; selecting the length of the land, the edge angle of the downstream bar, the die attack angle between the downstream bar surface of the coating slot and a tangent plane through a line on the surface to be coated parallel to, and directly opposite, the sharp edge, and the coating gap distance between the sharp edge and the surface to be coated in combination with each other; and selecting the slot height, the overbite, and the convergence in combination with each other.
  • the method can also include the step of applying a vacuum upstream of the bead to stabilize the bead.
  • the die can have an upstream bar with an upstream lip, a middle bar with a middle lip, and a downstream bar with a downstream lip.
  • the upstream lip is formed as a land
  • the middle lip is formed as a sharp edge
  • the downstream lip is formed as a sharp edge.
  • a first passageway runs through the die between the upstream and middle bars.
  • the passageway has a first slot defined by the upstream and middle lips, and coating fluid exits the die from the first slot to form a continuous coating bead between the upstream die lip, the middle die lip, and the surface being coated.
  • a second passageway runs through the die between the middle and downstream bars and has a second slot defined by the middle and downstream lips.
  • a predetermined amount of coating fluid leaves the bead and reenters the die in the second slot, and the remaining coating fluid in the bead is coated on the surface to be coated.
  • the head does not significantly move into the space between the land and the surface to be coated even as vacuum is increased.
  • the method of die coating according to this embodiment includes passing coating fluid through a first slot; exiting the coating fluid from the first slot to form a continuous coating bead between an upstream die lip, a middle die lip, and the surface being coated; passing a predetermined amount of coating fluid from the bead through a second slot; and coating the remaining coating fluid in the bead on the surface to be coated.
  • This invention is a die coating method and apparatus where the die includes a sharp edge and a land which are positioned to improve and optimize performance.
  • the land is configured to match the shape of the surface in the immediate area of coating liquid application.
  • the land can be curved to match a web passing around a backup roller or the land can be flat to match a free span of web between rollers.
  • the upstream lip 60 is formed as a curved land 68 and the downstream lip 62 is formed as a sharp edge 70.
  • This configuration improves overall performance over that of known die-type coaters. Improved performance means permitting operating at increased web speeds and increased coating gaps, operating with higher coating liquid viscosities, and creating thinner wet coating layer thicknesses.
  • the sharp edge 70 should be clean and free of nicks and burrs, and should be straight within 1 micron in 25 cm of length.
  • the edge radius is no greater than 10 microns.
  • the edge can be formed of an acute angle, as shown or as a right or obtuse angle, with or without a bevel. Alternatively, the edge can be formed with a "drop nose", on an extension of the downstream lip 62 that narrows the slot 56. Regardless of the edge configuration, proper overbite is required to maintain performance.
  • the radius of the curved land 68 should be equal to the radius of the backup roller 50 plus a minimal, and non-critical, 0.13 mm allowance for coating gap and web thickness.
  • the radius of the curved land 68 can exceed that of the backup roller 50 and shims can be used to orient the land with respect to the web 48.
  • a given convergence C achieved by a land with the same radius as the backup roller can be closely approached by a land with a larger radius than the backup roller by manipulating the land with the shims.
  • Figure 5 also shows dimensions of geometric operating parameters for single layer extrusion.
  • the length L 1 of the curved land 68 on the upstream bar 64 can range from 1.6 mm to 25.4 mm.
  • the preferred length L 1 is 12.7 mm.
  • the edge angle A 1 of the downstream bar 66 can range from 10° to 75°, and is preferably 60°.
  • the edge radius of the sharp edge 70 should be from about 2 microns to about 4 microns and less than 10 microns.
  • the die attack angle A 2 between the downstream bar 66 surface of the coating slot 56 and the tangent plane P through a line on the web 48 surface parallel to, and directly opposite, the sharp edge 70 can range from 30° to 150° and is preferably 90°-95°, such as 93°.
  • the coating gap G 1 is the perpendicular distance between the sharp edge 70 and the web 48. (The coating gap G 1 is measured at the sharp edge but is shown in some Figures spaced from the sharp edge for drawing clarity. Regardless of the location of G 1 in the drawings - and due to the curvature of the web the gap increases as one moves away from the sharp edge - the gap is measured at the sharp edge.)
  • Slot height H can range from 0.076 mm to 3.175 mm.
  • Overbite O is a positioning of the sharp edge 70 of the downstream bar 66, with respect to the downstream edge 72 of the curved land 68 on the upstream bar 64, in a direction toward the web 48. Overbite also can be viewed as a retraction of the downstream edge 72 of the curved land 68 away from the web 48, with respect to the sharp edge 70, for any given coating gap G 1 .
  • Overbite can range from 0 mm to 1.02 mm, and the settings at opposite ends of the die slot should be within 2.5 microns of each other. A precision mounting system for this coating system is required, for example to accomplish precise overbite uniformity.
  • Convergence C is a counterclockwise, as shown in Figure 5, angular positioning of the curved land 68 away from a location parallel to (or concentric with) the web 48, with the downstream edge 72 being the center of rotation. Convergence can range from 0° to 4.58°, and the settings at opposite ends of the die slot should he within 0.023° of each other.
  • the slot height, overbite, and convergence, as well as the fluid properties such as viscosity affect the performance of the die coating apparatus and method.
  • the slot height be 0.18 mm, the overbite be 0.076 mm, and the convergence be 0.57°. Performance levels using other slot heights can be nearly the same. Performance advantages can also be found at viscosities above 1,000 centipoise.
  • the vacuum chamber 42 can be an integral part of, or clamped to, the upstream bar 64 to allow precise, repeatable vacuum system gas flow.
  • the vacuum chamber 42 is formed using a vacuum bar 74 and can be connected through an optional vacuum restrictor 76 and a vacuum manifold 78 to a vacuum source channel 80.
  • a curved vacuum land 82 can be an integral part of the upstream bar 64, or can be part of the vacuum bar 74, which is secured to the upstream bar 64.
  • the vacuum land 82 has the same radius of curvature as the curved land 68.
  • the curved land 68 and the vacuum land 82 can be finish-ground together so they are "in line" with each other.
  • the vacuum land 82 and the curved land 68 then have the sale convergence C with respect to the web 48.
  • the vacuum land gap G 2 is the distance between the vacuum land 82 and the web 48 at the lower edge of the vacuum land and is the sum total of the coating gap G 1 , the overbite O, and the displacement caused by convergence C of the curved land 68. (Regardless of the location of G 1 in the drawings the gap is the perpendicular distance between the lower edge of the vacuum land and the web.)
  • the vacuum land gap G 2 is large, an excessive inrush of ambient air to the vacuum chamber 42 occurs. Even though the vacuum source may have sufficient capacity to compensate and maintain the specified vacuum pressure level at the vacuum chamber 42, the inrush of air can degrade coating performance.
  • the vacuum land 82 is part of a vacuum bar 74 which is attached to the upstream bar 64.
  • the curved land 68 is finished with the convergence C "ground in.”
  • the vacuum bar 74 is then attached and the vacuum land 82 is finish ground, using a different grind center, such that the vacuum land 82 is parallel to the web 48, and the vacuum land gap G 2 is equal to the coating gap G 1 when the desired overbite value is set.
  • the vacuum land length L 2 may range from 6.35 mm to 25.4 mm.
  • the preferred length L 2 is 12.7 mm.
  • This embodiment has greater overall coating performance capability in difficult coating situations than the embodiment of Figure 6, but it is always finish ground for one specific set of operating conditions. So, as coating gap G 1 or overbite O are changed vacuum land gap G 2 may move away from its optimum value.
  • the upstream bar 64 of the die 40 is mounted on an upstream bar positioner 84, and the vacuum bar 74 is mounted on a vacuum bar positioner 86.
  • the curved land 68 on the upstream bar 64 and the vacuum land 82 on the vacuum bar 74 are not connected directly to each other.
  • the vacuum chamber 42 is connected to its vacuum source through the vacuum bar 74 and the positioner 86.
  • the mounting and positioning for the vacuum bar 74 are separate from those for the upstream bar 64. This improves performance of the die and allows precise, repeatable vacuum system gas flow.
  • the robust configuration of the vacuum bar system also aids in the improved performance as compared with known systems. Also, this configuration for the vacuum bar 74 could improve performance of other known coaters, such as slot, extrusion, and slide coaters.
  • a flexible vacuum seal strip 88 seals between the upstream bar 64 and the vacuum bar 74.
  • Figures 19 and 20 show a system of the present invention for die coating where excess coating liquid is continuously metered into the coating bead from a die 270, and some of the coating liquid is subtractively metered out, such that a specified amount is coated onto the moving web.
  • Coating liquid 14 is supplied to the die 270 by a pump 272, and returned to a sump 274 by a second pump 276.
  • the die 270 using a stabilizing vacuum chamber 278, coats the precisely metered amount of coating liquid onto the web 48 moving over a backup roller 280.
  • Coating liquid 14 is pumped through an inlet channel 288 into a manifold 290 and through a flow slot 292 into the coating bead. Meanwhile, a predetermined amount of coating liquid is pumped out of the coating bead through an exit slot 294 into an exit manifold 296 and through an exit channel 298. The coating liquid remaining in the bead is coated onto the moving web 48. This system out-performs known systems.
  • the die parameters were set as follows.
  • the supply slot 292 height was 0.15 mm, and its overbite (middle edge 300 compared with the downstream edge 72 of the curved land) was 0.0 mm.
  • the exit slot 294 was 0.076 mm, and its overbite (downstream edge 70 compared with the middle edge 300) was 0.076 mm.
  • the cross-web width of the exit slot 294 was 3.2 mm less than the width of the supply slot 292 to eliminate air entrainment in the bead.
  • the convergence C was 0.23°.
  • the coats were smooth and streak-free.
  • attack angle A 2 between the supply slot 292 and the tangent plane P can range from 90° to 135°
  • attack angle A 5 between the exit slot 294 and the tangent plane P can range from 60° to 115°.
  • the vacuum bar can be mounted and adjusted separately from the upstream bar 282.

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  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (14)

  1. Düsenbeschichtungsvorrichtung zum Auftragen einer Fluidbeschichtung auf eine Oberfläche, die aufweist:
    eine Düse (40) mit einem flußaufwärts gelegenen Mantel (64) mit einer flußaufwärts gelegenen Lippe (60) und einem flußabwärts gelegenen Mantel (66) mit einer flußabwärts gelegenen Lippe (62), wobei die flußaufwärts gelegene Lippe als eine Quetschfläche (68) ausgebildet ist; und
    einen Verbindungsweg, der zwischen den flußaufwärts gelegenen und flußabwärts gelegenen Mänteln (64, 66) durch die Düse (40) läuft, wobei der Verbindungsweg einen Schlitz (56) aufweist, der durch die flußaufwärts gelegenen und flußabwärts gelegenen Lippen (60, 62) begrenzt ist, wobei ein Beschichtungsfluid (14) die Düse über den Schlitz verläßt, um einen zusammenhängenden Beschichtungsschwall (58) zwischen der flußaufwärts gelegenen Düsenlippe, der flußabwärts gelegenen Düsenlippe und der Oberfläche, die beschichtet wird, zu bilden;
    dadurch gekennzeichnet, daß die flußabwärts gelegene Lippe als eine scharfe Kante (70) mit einem Kantenradius, der nicht größer als 10 Mikrometer ist, ausgebildet ist.
  2. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei die scharfe Kante (70) relativ zu einer flußabwärts gelegenen Kante der Quetschfläche (68) positioniert ist, um einen Überhang O zu erzeugen.
  3. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei die Quetschfläche (68) unter Verwendung der flußabwärts gelegenen Kante der Quetschfläche als Drehzentrum winkelförmig von einer Stelle parallel zur Bahn oder konzentrisch mit ihr weg positioniert ist.
  4. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei der Spalt zwischen der scharfen Kante und der Oberfläche mehr als zehnmal die Dicke der Beschichtung auf der Oberfläche hat.
  5. Düsenbeschichtungsvorrichtung nach Anspruch 1, die ferner Einrichtungen aufweist, um die Beschichtungsleistung zu verbessern, indem zumindest entweder die Schlitzhöhe H, der Überhang O oder die Konvergenz C geändert wird, wobei die Schlitzhöhe, der Überhang und die Konvergenz in Verbindung miteinander ausgewählt werden und wobei die Länge L1 der Quetschfläche (68), der Kantenwinkel A1 des flußabwärts gelegenen Mantels (66), der Düsenangriffswinkel A2 zwischen der flußabwärts gelegenen Manteloberfläche des Beschichtungsschlitzes und einer Tangentialebene durch eine Linie auf der zu beschichtenden Oberfläche parallel und direkt entgegengesetzt zur scharfen Kante (70) und der Beschichtungsspaltabstand G zwischen der scharfen Kante und der zu beschichtenden Oberfläche in Verbindung miteinander ausgewählt werden.
  6. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei die Form der Quetschfläche (68) der Form der Oberfläche, die beschichtet wird, entspricht.
  7. Düsenbeschichtungsvorrichtung nach Anspruch 1, die ferner Einrichtungen zum Anlegen eines Vakuums flußaufwärts von dem Schwall (58) aufweist, um den Schwall zu stabilisieren, welche eine Vakuumkammer (42) mit einer Vakuumquetschfläche (82) als ihren flußaufwärts gelegenen Verschluß aufweisen.
  8. Düsenbeschichtungsvorrichtung nach Anspruch 7, wobei die Quetschfläche (68) und die Vakuumquetschfläche (82) gekrümmt sind und den gleichen Krümmungsradius haben, wobei die Vakuumquetschfläche konzentrisch mit der Quetschfläche ist und relativ zur Oberfläche, die beschichtet werden soll, die gleiche Konvergenz C wie die Quetschfläche hat und wobei die Vakuumquetschfläche die Konvergenz null relativ zur Oberfläche, die beschichtet werden soll, hat und die Quetschfläche mit einem konstant eingestellten Wert relativ zur Oberfläche, die beschichtet werden soll, konvergiert.
  9. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei die flußabwärts gelegene Lippe (62) einen austauschbaren flexiblen Streifen (350) aufweist.
  10. Düsenbeschichtungsvorrichtung nach Anspruch 9, wobei der austauschbare flexible Streifen (350) durch ein leichtes Vakuum, das durch den flußabwärts gelegenen Mantel (66) angelegt wird, oberhalb des Beschichtungsschlitzes in seiner Position gehalten wird.
  11. Düsenbeschichtungsvorrichtung nach Anspruch 1, wobei die flußabwärts gelegene Lippe (62) einen gespannten dünnen Draht aufweist.
  12. Düsenbeschichtungsvorrichtung nach Anspruch 1, die ferner aufweist:
    eine Abdeckung (260) mit niedriger Oberflächenenergie, welche auf die Oberfläche des flußabwärts gelegenen Mantels (66) benachbart zur scharfen Kante (70) aufgetragen ist, und eine Abdeckung (260) mit niedriger Oberflächenenergie, die auf die Ouetschfläche (68) benachbart zu ihrer flußabwärts gelegenen Kante aufgetragen ist, um eine im allgemeinen wellige Oberfläche darzustellen, wobei die Abdeckungen mit niedriger Oberflächenenergie sich nicht vollständig zu den Kanten des flußabwärts gelegenen Mantels und der Ouetschfläche erstrecken.
  13. Verfahren zum Düsenbeschichten einer Fluidbeschichtung auf eine Oberfläche, das aufweist:
    Führen von Beschichtungsfluid (14) durch einen Schlitz (56), der durch einen flußaufwärts gelegenen Mantel (64) mit einer flußaufwärts gelegenen Lippe (60) und einen flußabwärts gelegenen Mantel (66) mit einer flüßabwärts gelegenen Lippe (62) begrenzt ist, wobei die flußaufwärts gelegene Lippe als eine Quetschfläche (68) ausgebildet ist; und
    Auswählen der Schlitzhöhe H, des Überhangs O und der Konvergenz C in Verbindung miteinander;
    dadurch gekennzeichnet, daß die flußabwärts gelegene Lippe als eine scharfe Kante (70) mit einem Kantenradius ausgebildet ist, der nicht größer als 10 Mikrometer ist.
  14. Verfahren nach Anspruch 13, das ferner das Festlegen der Lage der scharfen Kante in einem Abstand von der Oberfläche aufweist, der mehr als zehnmal die Dicke der Beschichtung auf der Oberfläche ist.
EP95914074A 1994-04-29 1995-03-16 Düsenbeschichtungsverfahren und vorrichtung Expired - Lifetime EP0757597B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US23655194A 1994-04-29 1994-04-29
US08/236,570 US5759274A (en) 1994-04-29 1994-04-29 Die coating apparatus with surface covering
US08/236,635 US5639305A (en) 1994-04-29 1994-04-29 Die coating method and apparatus
US236551 1994-04-29
US236635 1994-04-29
US236570 1994-04-29
PCT/US1995/003312 WO1995029764A1 (en) 1994-04-29 1995-03-16 Die coating method and apparatus

Publications (2)

Publication Number Publication Date
EP0757597A1 EP0757597A1 (de) 1997-02-12
EP0757597B1 true EP0757597B1 (de) 1999-09-01

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EP95914074A Expired - Lifetime EP0757597B1 (de) 1994-04-29 1995-03-16 Düsenbeschichtungsverfahren und vorrichtung

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EP (1) EP0757597B1 (de)
JP (1) JP3766097B2 (de)
KR (1) KR100329583B1 (de)
CN (1) CN1067299C (de)
BR (1) BR9507567A (de)
CA (1) CA2187895A1 (de)
DE (1) DE69511856T2 (de)
MX (1) MX9605132A (de)
WO (1) WO1995029764A1 (de)

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US6813820B2 (en) 2001-12-19 2004-11-09 3M Innovative Properties Company Method of improving coating uniformity
US20030157252A1 (en) 2002-01-09 2003-08-21 Yasuhiko Tokimasa Apparatus and method for applying coating solution, die and method for assembling thereof
US8178166B2 (en) 2002-01-09 2012-05-15 Fujifilm Corporation Apparatus and method for applying coating solution, die and method for assembling thereof
US6720025B2 (en) 2002-07-01 2004-04-13 3M Innovative Properties Company Slot extrusion coating methods
JP2007505737A (ja) 2003-09-17 2007-03-15 スリーエム イノベイティブ プロパティズ カンパニー 実質的に均一な厚さを有するコーティング層を形成するための方法、およびダイコータ
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JP4841822B2 (ja) 2004-09-30 2011-12-21 富士フイルム株式会社 塗布膜付きウエブの製造方法
US7872716B2 (en) 2005-03-10 2011-01-18 Fujifilm Corporation Optical compensation film, polarizing plate and liquid crystal display
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JP6904770B2 (ja) * 2017-04-25 2021-07-21 株式会社ヒラノテクシード ウエブの冷却装置
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MX9605132A (es) 1997-08-30
JPH09511682A (ja) 1997-11-25
EP0757597A1 (de) 1997-02-12
CA2187895A1 (en) 1995-11-09
KR970702759A (ko) 1997-06-10
WO1995029764A1 (en) 1995-11-09
KR100329583B1 (ko) 2002-08-24
BR9507567A (pt) 1997-08-05
CN1147218A (zh) 1997-04-09
CN1067299C (zh) 2001-06-20
DE69511856T2 (de) 2000-02-24
DE69511856D1 (de) 1999-10-07
JP3766097B2 (ja) 2006-04-12

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