WO2012026330A1 - Web coating device - Google Patents

Web coating device Download PDF

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Publication number
WO2012026330A1
WO2012026330A1 PCT/JP2011/068229 JP2011068229W WO2012026330A1 WO 2012026330 A1 WO2012026330 A1 WO 2012026330A1 JP 2011068229 W JP2011068229 W JP 2011068229W WO 2012026330 A1 WO2012026330 A1 WO 2012026330A1
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WO
WIPO (PCT)
Prior art keywords
web
slit
coating
discharge port
roll
Prior art date
Application number
PCT/JP2011/068229
Other languages
French (fr)
Japanese (ja)
Inventor
藤田和彦
栗秋武史
北島賢司
Original Assignee
東レエンジニアリング株式会社
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.)
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Publication date
Application filed by 東レエンジニアリング株式会社 filed Critical 東レエンジニアリング株式会社
Priority to JP2012530620A priority Critical patent/JPWO2012026330A1/en
Publication of WO2012026330A1 publication Critical patent/WO2012026330A1/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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/511—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning
    • B65H2301/5114—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning coating

Definitions

  • the present invention relates to a web coating apparatus that continuously or intermittently applies a predetermined coating liquid to a running web, and is particularly suitable for applications that require uniform application of a coating liquid as a thin film.
  • the present invention relates to a web coating apparatus.
  • a predetermined coating liquid as a thin film on the surface of a web, for example, a metal foil or a resin film.
  • a metal foil 101 such as an aluminum foil or a copper foil.
  • a working layer 102 may be provided, and a relatively thick overcoating layer 103 may be provided thereon.
  • a capacitor, or the like by applying such anchor coating before overcoating, it is possible to prevent substances from being deposited on the metal foil 101.
  • the adhesiveness of the metal foil 101 and the overcoat layer 103 can be improved, the improvement of battery performance, the improvement of long-term durability, etc. can be expected.
  • the web 111 is run on a backup roll 112 and applied as a coating liquid supply means on the backup roll 112.
  • the gap between the outlet of the slit-like discharge port 114 of the coating head 113 and the surface of the backup roll 112 is equal to or slightly larger than the film thickness in the wet state applied to the web 111.
  • a method is known in which the coating film 115 is applied to the running web 111 continuously or intermittently with precise adjustment to the dimensions (in this application, such a method is referred to as “on-roll coating”). Call).
  • each member itself and assembly are required to have extremely high accuracy, and it is often difficult to meet the accuracy requirement.
  • the outlet of the slit-like discharge port 114 and the surface of the backup roll 112 are particularly difficult. It is often difficult to meet the extremely high accuracy required for the gaps between them.
  • the gap adjustment can be performed with high accuracy, if a foreign substance or the like enters the gap, a significant coating defect occurs due to the biting of the foreign substance. In some cases, the web 111 may be broken.
  • stripe-like coating irregularities strip-like color irregularities
  • Such stripe-shaped application unevenness may occur even when the web 111 itself has uneven thickness in the width direction or when the assembly accuracy is poor.
  • the application head 121 is provided with a reduced pressure suction port 123 that opens in the vicinity of the outlet of the slit-like discharge port 122, and the pressure is reduced on the upstream side of the coating part.
  • a coating method that suppresses air mixing due to the accompanying airflow is known. In such a coating method, the problem of streaky coating unevenness due to the accompanying airflow is reduced, but the gap between the outlet of the slit-like discharge port 122 and the surface of the backup roll 112 is extremely high accuracy.
  • the application head 113 is placed on a free path (air path) of the traveling web 111 (for example, an air path formed between the rolls 131 and 132).
  • a method is known in which the web 111 that is disposed and running is stretched so as to be slightly displaceable in a direction toward and away from the outlet of the slit-like discharge port 114 of the coating head 113 (in the present application, such a method is used).
  • the method is called “off-roll coating”) (for example, Patent Document 1).
  • Such an off-roll coating method makes the gap between the outlet of the slit-like discharge port 114 and the surface of the web 111 substantially zero (that is, while the web 111 is in contact with the outlet of the slit-like discharge port 114). Since the web 111 is displaceable in a direction toward and away from the outlet of the slit-shaped discharge port 114, it is possible to eliminate at least the possibility of breaking the web 111 due to the biting of foreign matter. This is one of the effective methods. However, the wrinkles of the web 111 itself (the web 111 may be curved in the longitudinal direction or the web 111 may have a part with poor flatness such as slack), or the running web 111 may flutter.
  • the web 111 may contact non-uniformly in the width direction at the tip of the coating head 113 (the exit of the slit-like discharge port 114) (for example, the contact pressure becomes non-uniform or the contact is made locally) Part may occur), and as a result, streaks and local application unevenness may occur.
  • the flapping of the web 111 can be suppressed to some extent by reducing the distance between the rolls 131 and 132, but it is difficult to suppress the uneven application due to the wrinkles of the web 111 itself.
  • the problem of the present invention is to prevent the occurrence of troubles due to the biting of foreign matter and prevent the occurrence of streaky coating unevenness due to the assembly accuracy, etc.
  • An object of the present invention is to provide a web coating apparatus capable of preventing the occurrence of coating unevenness due to wrinkles such as bending and loosening of the web itself and uniformly coating a coating liquid with a thin film.
  • a web coating apparatus is a predetermined coating liquid discharged from a slit-like discharge port of a coating liquid supply means extending in the width direction of the web on the surface of a running web.
  • the slit-shaped discharge port is disposed on the air path of the web, and the web is interposed between the slit-shaped discharge port and the slit-shaped discharge port.
  • an urging means for urging the web toward the slit-shaped discharge port with a uniform pressing force in the web width direction is provided in the web width direction.
  • the slit-like discharge port of the coating liquid supply means is disposed on the air path of the web, and is basically off-roll coating. Then, an urging force that biases the web toward the slit-like discharge port with a uniform pressing force in the web width direction at a position facing the slit-like discharge port with the web passing through the position of the slit-like discharge port interposed therebetween. Means are provided, and the web being coated is urged toward the slit-like discharge port with a uniform pressing force in the web width direction.
  • off-roll coating it is possible to prevent the occurrence of streaky coating unevenness due to troubles and assembly accuracy due to foreign matter biting, which is a drawback of on-roll coating (that is, Utilizing the advantage of off-roll coating as it is), provided with urging means to urge the web with equal pressing force in the web width direction, always apply the web with appropriate pressing force (slit discharge port)
  • the coating unevenness caused by wrinkles such as flapping of the web and bending or slack of the web itself, which is a disadvantage of conventional off-roll coating, is generated. Can be prevented.
  • this urging means only urges the running web toward the slit-like discharge port with a predetermined pressing force, the web (web running path) is provided at the position of the slit-like discharge port as necessary. Can be released toward the anti-slit discharge port side, compared to on-roll coating that mechanically regulates the gap to a constant value, there is no risk of foreign matter biting, and high assembly accuracy is not required .
  • This urging means can always urge the web toward the slit-like discharge port with a uniform pressing force in the web width direction, so that the running web is very unlikely to flutter, and the web itself is bent or slackened.
  • the web was always pressed against the coating liquid application part (slit discharge port) with an appropriate pressing force, and the wrinkles of the web itself were absorbed.
  • the coating liquid can be continuously or intermittently applied, and uniform application, particularly, uniform application with a thin film can be performed.
  • the pressing force applied to the web by the urging means is preferably distributed as evenly as possible in the web width direction. Is within ⁇ 5%, more preferably within ⁇ 3%.
  • the urging means for example, a form in which the roll surface is formed of a sponge roll formed of sponge, provided at a position facing the slit-like discharge port, Any of the modes including a chamber having a pressurizing chamber opened toward the web into which the pressurized gas is introduced can be employed.
  • a sponge roll by appropriately setting the hardness and thickness of the sponge that forms the roll surface, in the case of a pressurized gas chamber, the pressure of the gas introduced and the area of the applied pressure acting on the web By appropriately setting the size, the web can be always pressed evenly toward the coating liquid application portion (slit-shaped discharge port) with an appropriate pressing force, and uniform application with a thin film becomes possible.
  • a leveling roll for adjusting the path of the aerial path of the web to the front end position of the slit-like discharge port is provided before and after the slit-like discharge port in the web traveling direction.
  • a leveling roll is disposed, the web can be stably traveled on an air path route desirable for coating liquid application, and uniform coating is facilitated.
  • This leveling roll can be disposed only in either the front or back of the web traveling direction, and is not particularly required when a desirable aerial path route can be secured without providing the leveling roll.
  • the type of the web in the present invention is not particularly limited, and the present invention can be applied to any web that requires uniform coating liquid application.
  • a metal foil or a resin film can be used as the web in the present invention.
  • the web coating apparatus of the present invention basically adopting the off-roll coating method, the web passing through the position of the slit-shaped discharge port of the coating liquid supply means is interposed between the slit-shaped discharge port.
  • a biasing means for biasing the web toward the slit-shaped discharge port with equal pressing force in the web width direction is provided, and the web being coated is applied to the slit-shaped discharge port, that is, coating liquid.
  • the coating can be applied while urging with an appropriate pressing force that is uniform in the width direction of the web and can be displaced toward the anti-slit discharge port.
  • FIG. 1 is a schematic side view of a web coating apparatus according to a first embodiment of the present invention. It is a perspective view of the web coating apparatus which shows the more specific example of the form of FIG. It is a schematic side view of the web coating apparatus which concerns on the 2nd embodiment of this invention. It is a perspective view of the web coating apparatus which shows the more specific example of the form of FIG. It is a schematic sectional drawing which shows an example of the anchor coating form to metal foil. It is a perspective view which shows an example of the conventional on-roll coating system. It is a perspective view which shows an example of the on-roll coating system provided with the conventional suction mechanism. It is a perspective view which shows an example of the conventional off-roll coating system.
  • FIG. 1 shows a web coating apparatus according to a first embodiment of the present invention
  • FIG. 2 illustrates a more specific form thereof.
  • reference numerals 1 and 11 denote web coating apparatuses.
  • coating liquid supply means are provided on the aerial paths 3 and 13 of the running webs 2 and 12.
  • the coating heads 4 and 14 are arranged so that off-roll coating is performed.
  • a predetermined coating liquid discharged from the slit-like discharge ports 5 and 15 of the coating heads 4 and 14 extending in the width direction of the webs 2 and 12 is applied onto the surface (one side) of the running webs 2 and 12.
  • the film 16 is applied continuously or intermittently.
  • the air path 3 of the web 2 is formed between relatively small diameter rolls (leveling rolls) 6 and 7.
  • the air path 13 of the web 12 is relatively large. It is formed between a roll 17 having a diameter and a roll 18 having a relatively small diameter.
  • the coating liquid is discharged onto the surfaces of the webs 2 and 12 from the manifolds 8 and 19 in the coating heads 4 and 14 through the slit-shaped discharge ports 5 and 15.
  • the slit-like discharge ports 5, 15 are arranged on the aerial paths 3, 13 of the webs 2, 12, and the slits are interposed between the webs 2, 12.
  • a biasing means for biasing the webs 2 and 12 toward the outlets of the slit-like discharge ports 5 and 15 with a uniform pressing force in the web width direction is provided at a position facing the outlets of the discharge ports 5 and 15.
  • the urging means is composed of sponge rolls 9 and 20 each having a roll surface formed of a sponge.
  • the running webs 2, 12 approach the outlet at the exit positions of the slit-like discharge ports 5, 15. It has an appropriate degree of freedom in both the direction and the direction away from it, and it is possible to prevent the occurrence of streaky coating unevenness caused by troubles, assembly accuracy, and the like, which are disadvantages of the on-roll coating method. Due to the elasticity of the surfaces of the sponge rolls 9 and 20, the running webs 2 and 12 always have the outlets of the slit-like discharge ports 5 and 15 (that is, the webs 2 and 12 always have an appropriate pressing force in the width direction).
  • the webs 2 and 12 can be prevented from fluttering, and the webs 2 and 12 themselves can be bent even if there are wrinkles such as curvature and slack. 12 is continuously run and coated in a state of substantially contacting the slit-like discharge ports 5 and 15 via the discharge coating liquid.
  • a uniform and optimum coating state can be obtained.
  • FIG. 3 shows a web coating apparatus according to the second embodiment of the present invention
  • FIG. 4 illustrates a more specific form thereof.
  • the web coating apparatuses 21 and 31 shown in FIGS. 3 and 4 other than the urging means for urging the webs 2 and 12 toward the outlets of the slit-like discharge ports 5 and 15 with a uniform pressing force in the web width direction. 1 is substantially the same as the configuration shown in FIGS. 1 and 2, and the description thereof is omitted by attaching the same reference numerals as those shown in FIGS. 1 and 2.
  • the biasing means for biasing the webs 2 and 12 toward the outlets of the slit-like discharge ports 5 and 15 with an equal pressing force in the web width direction is opposed to the outlets of the slit-like discharge ports 5 and 15.
  • the pressure chambers 23 and 32 have pressure chambers 23 and 32 into which pressurized gas 22 (for example, pressurized air) is introduced. Is opened toward the webs 2 and 12 so that the pressure applied to the webs 2 and 12 can be applied.
  • the chamber 24 forming the pressurizing chamber 23 may be configured to extend between the rolls 6 and 7 as shown in FIG. 3 (in the form in which the pressurizing chamber 23 covers the rolls 6 and 7, As shown in FIG.
  • rolls 34 and 35 having relatively smaller diameters are disposed in the range of the aerial path 13 formed between the roll 17 and the roll 18 as shown in FIG. , 35 may be extended. In the latter case, the rolls 34 and 35 can also function as a general sealing means in the web running direction with respect to the pressurizing chamber 32.
  • the urging means in the form of the chambers 24 and 33 having the pressurizing chambers 23 and 32, the pressure of the pressurized gas introduced and the region of the applied pressure acting on the webs 2 and 12 (by appropriately setting the size of the pressurizing region: that is, the open region of the pressurizing chambers 23 and 32 toward the webs 2 and 12, the webs 2 and 12 are always slit-shaped discharge ports 5 with an appropriate pressing force, It becomes possible to press evenly in the web width direction toward the 15 outlets (coating liquid application portion), and uniform application with a thin film can be achieved.
  • the pressing by the pressurizing chambers 23 and 32 can apply a pressing force to the webs 2 and 12 over a wider area than the pressing by the sponge roll described above. If there is slack and the slack spreads over a certain area, it is possible to press the webs 2 and 12 evenly toward the slit-like discharge ports 5 and 15 with an appropriate pressing force. become.
  • the rolls 6 and 7 and the rolls 34 and 35 disposed before and after the running direction of the webs 2 and 12 in the pressurizing chambers 23 and 32 are fixed in position. If the position can be adjusted in the running directions 2 and 12, the area of the open area of the pressurizing chambers 23 and 32 toward the webs 2 and 12 can be slightly adjusted.
  • the chambers 24 and 33 themselves may be configured so that the area of the open region of the pressurizing chambers 23 and 32 can be adjusted.
  • the rolls 6 and 7 or the rolls 34 and 35 may basically be free rolls (that is, rolls that rotate following the running of the web).
  • the tension applied to the running webs 2 and 12 can be reduced, the wrinkles of the webs 2 and 12 caused by the tension can be prevented, and a uniform coating in a more desirable state is aimed at. It becomes possible.
  • the web coating apparatus according to the present invention can be applied to any web coating that requires uniform coating, and is particularly suitable for applications requiring thin film coating on metal foil or resin film.

Abstract

The present invention prevents the occurrence of uneven coating caused by flapping of a web or defects such as curvature or slackness in said web, while preventing the occurrence of uneven streaky coating, and enables uniform thin-film coating. The present invention is a device that coats the surface of a moving web (12) with a prescribed coating liquid discharged from a slit-shaped discharge port (15) in a coating liquid supply means (14) that extends in the width direction of the web. In addition to the positioning of the slit-shaped discharge port (15) on the mid-air path of the web (12), an impelling means (20) that impels the web (12) with a uniform pressing force in the web width direction facing the slit-shaped discharge port (15) is disposed at a position facing the slit-shaped discharge port (15), with the web (12) positioned therebetween.

Description

ウエブ塗工装置Web coating equipment
　本発明は、走行中のウエブに所定の塗液を連続的または間欠的に塗布していくウエブ塗工装置に関し、とくに、塗液を薄膜で均一に塗布することが要求される用途に好適なウエブ塗工装置に関する。 The present invention relates to a web coating apparatus that continuously or intermittently applies a predetermined coating liquid to a running web, and is particularly suitable for applications that require uniform application of a coating liquid as a thin film. The present invention relates to a web coating apparatus.
　ウエブ、例えば金属箔や樹脂フィルムの表面に、所定の塗液を薄膜で均一に塗布することが要求されることは多い。例えば、図５に示すように、アルミ箔や銅箔等の金属箔１０１上に、極薄膜の(例えば、ドライ状態かウエット状態かで異なるものの、０．５～１５μｍ程度の厚みの)アンカー塗工層１０２を設け、その上に比較的厚いオーバー塗工層１０３を設けることがある。例えば２次電池やキャパシタ等において、オーバー塗工前にこのようなアンカー塗工を施すことで、金属箔１０１上に物質が析出することを防止することができる。また、金属箔１０１とオーバー塗工層１０３との密着性を向上できるので、電池性能の向上や長期耐久性の向上等が期待できる。また、光学フィルム用途等では、ウエット状態で０．５～１μｍ程度の薄膜の塗工が要求されることがある。 It is often required to uniformly apply a predetermined coating liquid as a thin film on the surface of a web, for example, a metal foil or a resin film. For example, as shown in FIG. 5, an extremely thin film anchor (for example, having a thickness of about 0.5 to 15 μm, depending on whether it is dry or wet) is applied on a metal foil 101 such as an aluminum foil or a copper foil. A working layer 102 may be provided, and a relatively thick overcoating layer 103 may be provided thereon. For example, in a secondary battery, a capacitor, or the like, by applying such anchor coating before overcoating, it is possible to prevent substances from being deposited on the metal foil 101. Moreover, since the adhesiveness of the metal foil 101 and the overcoat layer 103 can be improved, the improvement of battery performance, the improvement of long-term durability, etc. can be expected. For optical film applications, etc., it may be required to apply a thin film of about 0.5 to 1 μm in a wet state.
　このような薄膜の塗工を均一な厚みで行うための一般的な方式として、例えば図６に示すように、ウエブ１１１をバックアップロール１１２上に走行させ、バックアップロール１１２上に塗液供給手段としての塗布ヘッド１１３を配置し、塗布ヘッド１１３のスリット状吐出口１１４の出口とバックアップロール１１２の表面との間の間隙を、ウエブ１１１に塗布されるウエット状態での膜厚と同等か僅かに大きい寸法に精度よく調整して、走行中のウエブ１１１に連続的または間欠的に塗膜１１５を塗工していく方式が知られている(本願では、このような方式を「オンロール塗工」と呼ぶ)。しかしこのオンロール塗工方式においては、各部材自体や組み付けに極めて高い精度が要求され、その精度要求に応えることが難しい場合が多く、とくにスリット状吐出口１１４の出口とバックアップロール１１２の表面との間の間隙に要求される極めて高い精度に応えることが難しい場合が多い。また、このような方式においては、たとえ高精度の間隙調整を行うことができたとしても、その間隙部に異物等が進入した場合には、その異物の噛み込みにより、顕著な塗布欠陥が生じたり、場合によってはウエブ１１１が破断するおそれも生じる。また、ウエブ１１１の走行に伴う随伴気流の巻き込み等により、ウエブ１１１の長手方向に延びウエブ１１１の幅方向に分布する多数のスジ状の塗布むら(スジ状の色むらとなって現れることが多い)が生じることがある。このようなスジ状の塗布むらは、ウエブ１１１自体にその幅方向において厚みむらが存在する場合や、上記組み付けの精度が悪い場合にも発生することがある。 As a general method for applying such a thin film with a uniform thickness, for example, as shown in FIG. 6, the web 111 is run on a backup roll 112 and applied as a coating liquid supply means on the backup roll 112. The gap between the outlet of the slit-like discharge port 114 of the coating head 113 and the surface of the backup roll 112 is equal to or slightly larger than the film thickness in the wet state applied to the web 111. A method is known in which the coating film 115 is applied to the running web 111 continuously or intermittently with precise adjustment to the dimensions (in this application, such a method is referred to as “on-roll coating”). Call). However, in this on-roll coating method, each member itself and assembly are required to have extremely high accuracy, and it is often difficult to meet the accuracy requirement. In particular, the outlet of the slit-like discharge port 114 and the surface of the backup roll 112 are particularly difficult. It is often difficult to meet the extremely high accuracy required for the gaps between them. Further, in such a system, even if the gap adjustment can be performed with high accuracy, if a foreign substance or the like enters the gap, a significant coating defect occurs due to the biting of the foreign substance. In some cases, the web 111 may be broken. In addition, due to the entrainment of the accompanying air flow accompanying the running of the web 111, a large number of stripe-like coating irregularities (strip-like color irregularities) that extend in the longitudinal direction of the web 111 and are distributed in the width direction of the web 111 often appear. ) May occur. Such stripe-shaped application unevenness may occur even when the web 111 itself has uneven thickness in the width direction or when the assembly accuracy is poor.
　このような問題に対処するために、例えば図７に示すように、塗布ヘッド１２１に、スリット状吐出口１２２の出口近傍に開口する減圧吸引口１２３を設け、塗工部の上流側において減圧するとともに随伴気流によるエアー混入を抑えるようにした塗工方式が知られている。このような塗工方式では、上述の随伴気流に起因するスジ状の塗布むらの問題は軽減されるものの、スリット状吐出口１２２の出口とバックアップロール１１２の表面との間の間隙に極めて高い精度が要求されることに変わりはないため、上述の異物噛み込みによる塗布欠陥やウエブ破断の問題、さらにはウエブ１１１自体の幅方向における厚みむらや組み付けの精度が悪いことに起因するスジ状の塗布むらの問題は依然として残る。 In order to deal with such a problem, for example, as shown in FIG. 7, the application head 121 is provided with a reduced pressure suction port 123 that opens in the vicinity of the outlet of the slit-like discharge port 122, and the pressure is reduced on the upstream side of the coating part. At the same time, a coating method that suppresses air mixing due to the accompanying airflow is known. In such a coating method, the problem of streaky coating unevenness due to the accompanying airflow is reduced, but the gap between the outlet of the slit-like discharge port 122 and the surface of the backup roll 112 is extremely high accuracy. As described above, there is no change to the above, so that the above-mentioned coating defects and web breakage problems due to biting of foreign matter, as well as the unevenness of thickness in the width direction of the web 111 itself and poor assembly accuracy are caused. The problem of unevenness remains.
　このような残された問題に対し、例えば図８に示すように、走行されるウエブ１１１のフリーパス(空中パス)(例えば、ロール１３１、１３２間に形成した空中パス)上に塗布ヘッド１１３を配置し、走行中のウエブ１１１を、塗布ヘッド１１３のスリット状吐出口１１４の出口に対し近づく方向と離れる方向とに多少変位可能に張設する方式が知られている(本願では、このような方式を「オフロール塗工」と呼ぶ)(例えば、特許文献１)。このようなオフロール塗工方式は、スリット状吐出口１１４の出口とウエブ１１１の表面との間隙を実質的にゼロにしつつ（つまり、ウエブ１１１をスリット状吐出口１１４の出口に接触させつつ）、ウエブ１１１がスリット状吐出口１１４の出口に対し近づく方向と離れる方向とに変位可能であるため少なくとも異物噛み込みによるウエブ１１１の破断のおそれを除去することが可能であるので、薄膜塗工のためには有効な手法の一つである。しかしながら、ウエブ１１１自体の癖(ウエブ１１１が長手方向に湾曲していたり、ウエブ１１１に部分的に弛み等の平面性が悪い部位が存在していたりすることがある)や、走行ウエブ１１１のばたつき等により、塗布ヘッド１１３の先端部（スリット状吐出口１１４の出口部）でウエブ１１１が幅方向において不均一に接触することがあり(例えば、接触圧が不均一になったり、局部的に接触しない部位が生じたりすることがあり)、それに起因してスジ状や局部的な塗布むらが生じることがある。ウエブ１１１のばたつきは、ロール１３１、１３２間の距離を縮めることである程度抑えることは可能であるが、上記のようなウエブ１１１自体の癖に起因する塗布むらについては、抑えることが難しい。 For such a remaining problem, for example, as shown in FIG. 8, the application head 113 is placed on a free path (air path) of the traveling web 111 (for example, an air path formed between the rolls 131 and 132). A method is known in which the web 111 that is disposed and running is stretched so as to be slightly displaceable in a direction toward and away from the outlet of the slit-like discharge port 114 of the coating head 113 (in the present application, such a method is used). The method is called “off-roll coating”) (for example, Patent Document 1). Such an off-roll coating method makes the gap between the outlet of the slit-like discharge port 114 and the surface of the web 111 substantially zero (that is, while the web 111 is in contact with the outlet of the slit-like discharge port 114). Since the web 111 is displaceable in a direction toward and away from the outlet of the slit-shaped discharge port 114, it is possible to eliminate at least the possibility of breaking the web 111 due to the biting of foreign matter. This is one of the effective methods. However, the wrinkles of the web 111 itself (the web 111 may be curved in the longitudinal direction or the web 111 may have a part with poor flatness such as slack), or the running web 111 may flutter. For example, the web 111 may contact non-uniformly in the width direction at the tip of the coating head 113 (the exit of the slit-like discharge port 114) (for example, the contact pressure becomes non-uniform or the contact is made locally) Part may occur), and as a result, streaks and local application unevenness may occur. The flapping of the web 111 can be suppressed to some extent by reducing the distance between the rolls 131 and 132, but it is difficult to suppress the uneven application due to the wrinkles of the web 111 itself.
特開２０００－５１７６７号公報JP 2000-51767 A
　そこで本発明の課題は、上記のような実情に鑑み、異物噛み込みに起因するトラブルの発生を防止するとともに組み付け精度等に起因するスジ状の塗布むらの発生を防止しつつ、ウエブのばたつきやウエブ自体の湾曲や弛み等の癖に起因する塗布むらの発生を防止し、塗液を薄膜で均一に塗布することが可能なウエブ塗工装置を提供することにある。 Therefore, in view of the above situation, the problem of the present invention is to prevent the occurrence of troubles due to the biting of foreign matter and prevent the occurrence of streaky coating unevenness due to the assembly accuracy, etc. An object of the present invention is to provide a web coating apparatus capable of preventing the occurrence of coating unevenness due to wrinkles such as bending and loosening of the web itself and uniformly coating a coating liquid with a thin film.
　上記課題を解決するために、本発明に係るウエブ塗工装置は、走行中のウエブの表面に、該ウエブの幅方向に延びる塗液供給手段のスリット状吐出口から吐出される所定の塗液を連続的または間欠的に塗布していくウエブ塗工装置において、前記スリット状吐出口を、ウエブの空中パス上に配置するとともに、該ウエブを間にして前記スリット状吐出口に対向する位置に、該ウエブを前記スリット状吐出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段を設けたことを特徴とするものからなる。 In order to solve the above-mentioned problems, a web coating apparatus according to the present invention is a predetermined coating liquid discharged from a slit-like discharge port of a coating liquid supply means extending in the width direction of the web on the surface of a running web. In the web coating apparatus that continuously or intermittently coats the slit-shaped discharge port, the slit-shaped discharge port is disposed on the air path of the web, and the web is interposed between the slit-shaped discharge port and the slit-shaped discharge port. And an urging means for urging the web toward the slit-shaped discharge port with a uniform pressing force in the web width direction.
　このような本発明に係るウエブ塗工装置においては、塗液供給手段のスリット状吐出口がウエブの空中パス上に配置され、基本的にはオフロール塗工とされる。そして、スリット状吐出口の位置を通過するウエブを間にしてスリット状吐出口に対向する位置に、該ウエブをスリット状吐出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段が設けられ、塗工中のウエブがスリット状吐出口に向けてウエブ幅方向に均等な押圧力をもって付勢される。すなわち、基本的にオフロール塗工とすることにより、オンロール塗工の欠点である異物噛み込みに起因するトラブルや組み付け精度等に起因するスジ状の塗布むらの発生を防止可能にしつつ（つまり、オフロール塗工の長所はそのまま活かしつつ）、ウエブをウエブ幅方向に均等な押圧力をもって付勢する付勢手段を設け、適度な押圧力をもって常時ウエブを塗液塗布部（スリット状吐出口）に向けて押し付けその状態で連続的または間欠的に塗布を行うことにより、従来のオフロール塗工における短所である、ウエブのばたつきやウエブ自体の湾曲や弛み等の癖に起因する塗布むらの発生を防止可能としたものである。この付勢手段は、所定の押圧力をもって走行中のウエブをスリット状吐出口に向けて付勢するだけであるから、必要に応じて、スリット状吐出口の位置でウエブ（ウエブの走行パス）を反スリット状吐出口側に向けて逃がすことが可能であり、機械的に間隙を一定の値に規定するオンロール塗工に比べ、異物が噛み込むおそれがなく、また、高い組み付け精度も要求されない。そしてこの付勢手段は、ウエブ幅方向に均等な押圧力をもってウエブをスリット状吐出口に向けて常時付勢できるから、走行中のウエブにばたつきは極めて生じにくくなるとともに、ウエブ自体に湾曲や弛み等の癖が存在している場合にあっても、ウエブは適度な押圧力をもって常時塗液塗布部（スリット状吐出口）に向けて押し付けられる状態に保たれ、ウエブ自体の癖が吸収された状態での塗液の連続的なあるいは間欠的な塗布が可能になり、均一な塗布、とくに薄膜での均一な塗布を行うことが可能になる。なお、このような均一な塗布を達成するためには、上記付勢手段によってウエブに付与される押圧力は、ウエブ幅方向にできるだけ均等に分布されることが好ましく、その分布のばらつきは、望ましくは±５％以内、さらに望ましくは±３％以内である。 In such a web coating apparatus according to the present invention, the slit-like discharge port of the coating liquid supply means is disposed on the air path of the web, and is basically off-roll coating. Then, an urging force that biases the web toward the slit-like discharge port with a uniform pressing force in the web width direction at a position facing the slit-like discharge port with the web passing through the position of the slit-like discharge port interposed therebetween. Means are provided, and the web being coated is urged toward the slit-like discharge port with a uniform pressing force in the web width direction. In other words, basically by using off-roll coating, it is possible to prevent the occurrence of streaky coating unevenness due to troubles and assembly accuracy due to foreign matter biting, which is a drawback of on-roll coating (that is, Utilizing the advantage of off-roll coating as it is), provided with urging means to urge the web with equal pressing force in the web width direction, always apply the web with appropriate pressing force (slit discharge port) By applying the coating continuously or intermittently in the state, the coating unevenness caused by wrinkles such as flapping of the web and bending or slack of the web itself, which is a disadvantage of conventional off-roll coating, is generated. Can be prevented. Since this urging means only urges the running web toward the slit-like discharge port with a predetermined pressing force, the web (web running path) is provided at the position of the slit-like discharge port as necessary. Can be released toward the anti-slit discharge port side, compared to on-roll coating that mechanically regulates the gap to a constant value, there is no risk of foreign matter biting, and high assembly accuracy is not required . This urging means can always urge the web toward the slit-like discharge port with a uniform pressing force in the web width direction, so that the running web is very unlikely to flutter, and the web itself is bent or slackened. Even in the presence of wrinkles, etc., the web was always pressed against the coating liquid application part (slit discharge port) with an appropriate pressing force, and the wrinkles of the web itself were absorbed. In this state, the coating liquid can be continuously or intermittently applied, and uniform application, particularly, uniform application with a thin film can be performed. In order to achieve such uniform coating, the pressing force applied to the web by the urging means is preferably distributed as evenly as possible in the web width direction. Is within ± 5%, more preferably within ± 3%.
　上記本発明に係るウエブ塗工装置においては、上記付勢手段として、例えば、ロール表面がスポンジで形成されたスポンジロールから構成されている形態、スリット状吐出口に対向する位置に設けられ、加圧気体が導入されるウエブに向けて開放された加圧室を有するチャンバから構成されている形態、のいずれも採り得る。スポンジロールの場合には、ロール表面を形成するスポンジの硬度や厚みを適切に設定することにより、加圧気体チャンバの場合には、導入される気体の圧力およびウエブに作用する加圧力の領域のサイズを適切に設定することにより、ウエブを適度な押圧力をもって常時塗液塗布部（スリット状吐出口）に向けて均等に押し付けることができ、薄膜で均一な塗布が可能になる。 In the web coating apparatus according to the present invention, as the urging means, for example, a form in which the roll surface is formed of a sponge roll formed of sponge, provided at a position facing the slit-like discharge port, Any of the modes including a chamber having a pressurizing chamber opened toward the web into which the pressurized gas is introduced can be employed. In the case of a sponge roll, by appropriately setting the hardness and thickness of the sponge that forms the roll surface, in the case of a pressurized gas chamber, the pressure of the gas introduced and the area of the applied pressure acting on the web By appropriately setting the size, the web can be always pressed evenly toward the coating liquid application portion (slit-shaped discharge port) with an appropriate pressing force, and uniform application with a thin film becomes possible.
　また、本発明に係るウエブ塗工装置においては、上記スリット状吐出口のウエブ走行方向前後に、ウエブの空中パスの経路をスリット状吐出口の先端位置に合わせるレベリングロールが設けられていることが好ましい。このようなレベリングロールを配置しておけば、ウエブを、塗液塗布上望ましい空中パス経路上を安定して走行させることができ、均一な塗布がより行いやすくなる。このレベリングロールは、ウエブ走行方向前後のいずれか一方にのみ配置することも可能であり、レベリングロールを設けなくても望ましい空中パス経路を確保できる場合には、とくに設けなくてもよい。 Further, in the web coating apparatus according to the present invention, a leveling roll for adjusting the path of the aerial path of the web to the front end position of the slit-like discharge port is provided before and after the slit-like discharge port in the web traveling direction. preferable. If such a leveling roll is disposed, the web can be stably traveled on an air path route desirable for coating liquid application, and uniform coating is facilitated. This leveling roll can be disposed only in either the front or back of the web traveling direction, and is not particularly required when a desirable aerial path route can be secured without providing the leveling roll.
　本発明におけるウエブの種類としてはとくに限定されず、均一な塗液塗布が要求されるあらゆるウエブに対して本発明を適用可能である。代表的には、前述したように、本発明におけるウエブとして、金属箔や樹脂フィルムを使用できる。 The type of the web in the present invention is not particularly limited, and the present invention can be applied to any web that requires uniform coating liquid application. Typically, as described above, a metal foil or a resin film can be used as the web in the present invention.
　本発明に係るウエブ塗工装置によれば、基本的にはオフロール塗工方式を採用しつつ、塗液供給手段のスリット状吐出口の位置を通過するウエブを間にしてスリット状吐出口に対向する位置に、ウエブをスリット状吐出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段を設けて、塗工中のウエブを、スリット状吐出口、つまり塗液の塗布部に対してウエブ幅方向に均等なかつ反スリット状吐出口側への変位も許容し得る適切な押圧力をもって付勢しながら塗工できるようにしたので、オンロール塗工方式の場合のような異物噛み込みに起因するトラブルの発生や組み付け精度等に起因するスジ状の塗布むらの発生を防止しつつ、ウエブのばたつきやウエブ自体の湾曲や弛み等の癖に起因する塗布むらの発生を防止することが可能となり、薄膜で均一な塗工が可能になる。 According to the web coating apparatus of the present invention, basically adopting the off-roll coating method, the web passing through the position of the slit-shaped discharge port of the coating liquid supply means is interposed between the slit-shaped discharge port. At the opposite position, a biasing means for biasing the web toward the slit-shaped discharge port with equal pressing force in the web width direction is provided, and the web being coated is applied to the slit-shaped discharge port, that is, coating liquid. The coating can be applied while urging with an appropriate pressing force that is uniform in the width direction of the web and can be displaced toward the anti-slit discharge port. While preventing troubles caused by biting and streaky application unevenness due to assembly accuracy, etc., it prevents occurrence of uneven application due to wrinkles such as flapping of the web or bending or slack of the web itself. thing Possible and becomes allows uniform coating with a thin film.
本発明の第１実施態様に係るウエブ塗工装置の概略側面図である。1 is a schematic side view of a web coating apparatus according to a first embodiment of the present invention. 図１の形態のより具体的な例を示すウエブ塗工装置の斜視図である。It is a perspective view of the web coating apparatus which shows the more specific example of the form of FIG. 本発明の第２実施態様に係るウエブ塗工装置の概略側面図である。It is a schematic side view of the web coating apparatus which concerns on the 2nd embodiment of this invention. 図３の形態のより具体的な例を示すウエブ塗工装置の斜視図である。It is a perspective view of the web coating apparatus which shows the more specific example of the form of FIG. 金属箔へのアンカー塗工形態の一例を示す概略断面図である。It is a schematic sectional drawing which shows an example of the anchor coating form to metal foil. 従来のオンロール塗工方式の一例を示す斜視図である。It is a perspective view which shows an example of the conventional on-roll coating system. 従来の吸引機構を備えたオンロール塗工方式の一例を示す斜視図である。It is a perspective view which shows an example of the on-roll coating system provided with the conventional suction mechanism. 従来のオフロール塗工方式の一例を示す斜視図である。It is a perspective view which shows an example of the conventional off-roll coating system.
　以下に、本発明の望ましい実施の形態について、図面を参照して説明する。
　図１は、本発明の第１実施態様に係るウエブ塗工装置を示しており、図２はそのより具体的な形態を例示している。図１、図２において、１、１１はウエブ塗工装置を示しており、該ウエブ塗工装置１、１１においては、走行中のウエブ２、１２の空中パス３、１３上に塗液供給手段としての塗布ヘッド４、１４が配置されており、オフロール方式の塗工が行われるようになっている。この走行中のウエブ２、１２の表面(片面)上に、該ウエブ２、１２の幅方向に延びる塗布ヘッド４、１４のスリット状吐出口５、１５から吐出される所定の塗液が、塗膜１６として連続的または間欠的に塗布されていくようになっている。図１に示す形態では、ウエブ２の空中パス３は比較的小径のロール（レベリングロール）６、７間で形成されており、図２に示す形態では、ウエブ１２の空中パス１３は比較的大径のロール１７と比較的小径のロール１８との間で形成されている。塗液は、塗布ヘッド４、１４内のマニホールド８、１９からスリット状吐出口５、１５を通してウエブ２、１２の表面上に吐出される。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a web coating apparatus according to a first embodiment of the present invention, and FIG. 2 illustrates a more specific form thereof. 1 and 2, reference numerals 1 and 11 denote web coating apparatuses. In the web coating apparatuses 1 and 11, coating liquid supply means are provided on the aerial paths 3 and 13 of the running webs 2 and 12. The coating heads 4 and 14 are arranged so that off-roll coating is performed. A predetermined coating liquid discharged from the slit- like discharge ports 5 and 15 of the coating heads 4 and 14 extending in the width direction of the webs 2 and 12 is applied onto the surface (one side) of the running webs 2 and 12. The film 16 is applied continuously or intermittently. In the form shown in FIG. 1, the air path 3 of the web 2 is formed between relatively small diameter rolls (leveling rolls) 6 and 7. In the form shown in FIG. 2, the air path 13 of the web 12 is relatively large. It is formed between a roll 17 having a diameter and a roll 18 having a relatively small diameter. The coating liquid is discharged onto the surfaces of the webs 2 and 12 from the manifolds 8 and 19 in the coating heads 4 and 14 through the slit-shaped discharge ports 5 and 15.
　このようなオフロール方式のウエブ塗工装置１、１１において、上記スリット状吐出口５、１５がウエブ２、１２の空中パス３、１３上に配置されつつ、ウエブ２、１２を間にしてスリット状吐出口５、１５の出口に対向する位置に、該ウエブ２、１２をスリット状吐出口５、１５の出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段が設けられており、この付勢手段は、本実施態様では、ロール表面がスポンジで形成されたスポンジロール９、２０から構成されている。 In such an off-roll type web coating apparatus 1, 11, the slit- like discharge ports 5, 15 are arranged on the aerial paths 3, 13 of the webs 2, 12, and the slits are interposed between the webs 2, 12. A biasing means for biasing the webs 2 and 12 toward the outlets of the slit- like discharge ports 5 and 15 with a uniform pressing force in the web width direction is provided at a position facing the outlets of the discharge ports 5 and 15. In this embodiment, the urging means is composed of sponge rolls 9 and 20 each having a roll surface formed of a sponge.
　このようなウエブ塗工装置１、１１においては、基本的にはオフロール塗工とされているので、走行中のウエブ２、１２はスリット状吐出口５、１５の出口位置において該出口に近づく方向と離れる方向とに適度な自由度を持ち、オンロール塗工方式の欠点である異物噛み込みに起因するトラブルや組み付け精度等に起因するスジ状の塗布むらの発生が防止される。そして、スポンジロール９、２０の表面の弾力性により、走行中のウエブ２、１２は常時ウエブ２、１２の幅方向に適度の均等な押圧力をもってスリット状吐出口５、１５の出口（つまり、塗液塗布部）に向けて押し付けられることになるので、ウエブ２、１２のばたつきが抑えられるとともに、ウエブ２、１２自体に湾曲や弛み等の癖が存在する場合にあっても、ウエブ２、１２はスリット状吐出口５、１５に吐出塗液を介して実質的に接触した状態で連続的に走行され、塗工されることになる。とくに、スポンジロール９、２０の外径や、ロール表面を形成するスポンジの硬度や厚みを適切に設定することにより、均一で最適な塗工状態を現出できる。その結果、従来のオフロール塗工方式の欠点である、ウエブ２、１２のばたつきやウエブ２、１２自体の湾曲や弛み等の癖に起因する塗布むらの発生が防止され、塗液の均一な塗布、とくに薄膜での均一な塗布を行うことが可能になる。 In such a web coating apparatus 1, 11, since it is basically an off-roll coating, the running webs 2, 12 approach the outlet at the exit positions of the slit- like discharge ports 5, 15. It has an appropriate degree of freedom in both the direction and the direction away from it, and it is possible to prevent the occurrence of streaky coating unevenness caused by troubles, assembly accuracy, and the like, which are disadvantages of the on-roll coating method. Due to the elasticity of the surfaces of the sponge rolls 9 and 20, the running webs 2 and 12 always have the outlets of the slit-like discharge ports 5 and 15 (that is, the webs 2 and 12 always have an appropriate pressing force in the width direction). Since the web 2 is pressed against the coating liquid application portion), the webs 2 and 12 can be prevented from fluttering, and the webs 2 and 12 themselves can be bent even if there are wrinkles such as curvature and slack. 12 is continuously run and coated in a state of substantially contacting the slit- like discharge ports 5 and 15 via the discharge coating liquid. In particular, by appropriately setting the outer diameter of the sponge rolls 9 and 20 and the hardness and thickness of the sponge forming the roll surface, a uniform and optimum coating state can be obtained. As a result, the occurrence of coating unevenness due to wrinkles such as flapping of the webs 2 and 12 and the bending and loosening of the webs 2 and 12 itself, which is a drawback of the conventional off-roll coating method, is prevented, and the coating liquid is uniform. It is possible to perform coating, particularly uniform coating with a thin film.
　図３は、本発明の第２実施態様に係るウエブ塗工装置を示しており、図４はそのより具体的な形態を例示している。図３、図４に示すウエブ塗工装置２１、３１においては、ウエブ２、１２をスリット状吐出口５、１５の出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段以外の構成は、図１、図２に示した構成と実質的に同一であるので、図１、図２において付したのと同一の符号を付すことにより説明を省略する。 FIG. 3 shows a web coating apparatus according to the second embodiment of the present invention, and FIG. 4 illustrates a more specific form thereof. In the web coating apparatuses 21 and 31 shown in FIGS. 3 and 4, other than the urging means for urging the webs 2 and 12 toward the outlets of the slit- like discharge ports 5 and 15 with a uniform pressing force in the web width direction. 1 is substantially the same as the configuration shown in FIGS. 1 and 2, and the description thereof is omitted by attaching the same reference numerals as those shown in FIGS. 1 and 2.
　本実施態様では、ウエブ２、１２をスリット状吐出口５、１５の出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段が、スリット状吐出口５、１５の出口に対向する位置に設けられ、加圧気体２２(例えば、加圧空気)が導入される加圧室２３、３２を有するチャンバ２４、３３から構成されており、加圧室２３、３２は加圧気体２２による圧力をウエブ２、１２に負荷できるようウエブ２、１２に向けて開放されている。加圧室２３を形成するチャンバ２４は、図３に示すようにロール６、７間にわたって延在するように構成してもよく（加圧室２３がロール６、７を覆っている形態でも、覆っていない状態でもよく）、図４に示すように、ロール１７とロール１８との間に形成されている空中パス１３の範囲内にさらに比較的小径のロール３４、３５を配置し、ロール３４、３５間にわたって延在するように構成してもよい。後者の場合、ロール３４、３５は、加圧室３２に対し、ウエブ走行方向における概略シール手段としても機能できる。 In this embodiment, the biasing means for biasing the webs 2 and 12 toward the outlets of the slit- like discharge ports 5 and 15 with an equal pressing force in the web width direction is opposed to the outlets of the slit- like discharge ports 5 and 15. The pressure chambers 23 and 32 have pressure chambers 23 and 32 into which pressurized gas 22 (for example, pressurized air) is introduced. Is opened toward the webs 2 and 12 so that the pressure applied to the webs 2 and 12 can be applied. The chamber 24 forming the pressurizing chamber 23 may be configured to extend between the rolls 6 and 7 as shown in FIG. 3 (in the form in which the pressurizing chamber 23 covers the rolls 6 and 7, As shown in FIG. 4, rolls 34 and 35 having relatively smaller diameters are disposed in the range of the aerial path 13 formed between the roll 17 and the roll 18 as shown in FIG. , 35 may be extended. In the latter case, the rolls 34 and 35 can also function as a general sealing means in the web running direction with respect to the pressurizing chamber 32.
　このような加圧室２３、３２を備えたチャンバ２４、３３の形態の付勢手段を構成することによっても、導入される加圧気体の圧力およびウエブ２、１２に作用する加圧力の領域(加圧領域：つまり加圧室２３、３２のウエブ２、１２に向けての開放領域)のサイズを適切に設定することにより、ウエブ２、１２を適度な押圧力をもって常時スリット状吐出口５、１５の出口（塗液塗布部）に向けてウエブ幅方向に均等に押し付けることが可能になり、薄膜で均一な塗布を達成可能となる。この加圧室２３、３２による押圧の方が、前述のスポンジロールによる押圧に比べ、より広い領域にわたってウエブ２、１２に押圧力を加えることができるので、例えば、ウエブ２、１２に局所的な弛みが存在し、その弛みがある程度の面積にわたって広がっているような場合には、より適切にウエブ２、１２を適度な押圧力をもってスリット状吐出口５、１５に向けて均等に押し付けることが可能になる。 By configuring the urging means in the form of the chambers 24 and 33 having the pressurizing chambers 23 and 32, the pressure of the pressurized gas introduced and the region of the applied pressure acting on the webs 2 and 12 ( By appropriately setting the size of the pressurizing region: that is, the open region of the pressurizing chambers 23 and 32 toward the webs 2 and 12, the webs 2 and 12 are always slit-shaped discharge ports 5 with an appropriate pressing force, It becomes possible to press evenly in the web width direction toward the 15 outlets (coating liquid application portion), and uniform application with a thin film can be achieved. The pressing by the pressurizing chambers 23 and 32 can apply a pressing force to the webs 2 and 12 over a wider area than the pressing by the sponge roll described above. If there is slack and the slack spreads over a certain area, it is possible to press the webs 2 and 12 evenly toward the slit- like discharge ports 5 and 15 with an appropriate pressing force. become.
　なお、図３、図４に示した形態では、加圧室２３、３２のウエブ２、１２の走行方向前後に配置されたロール６、７およびロール３４、３５は位置固定としたが、例えばウエブ２、１２の走行方向に位置調整できるようにしておけば、加圧室２３、３２のウエブ２、１２に向けての開放領域の面積を多少調整できるようになる。もちろん、チャンバ２４、３３自体を、その加圧室２３、３２の開放領域の面積を調整できるように構成しておいてもよい。 3 and 4, the rolls 6 and 7 and the rolls 34 and 35 disposed before and after the running direction of the webs 2 and 12 in the pressurizing chambers 23 and 32 are fixed in position. If the position can be adjusted in the running directions 2 and 12, the area of the open area of the pressurizing chambers 23 and 32 toward the webs 2 and 12 can be slightly adjusted. Of course, the chambers 24 and 33 themselves may be configured so that the area of the open region of the pressurizing chambers 23 and 32 can be adjusted.
　さらに、ロール６、７あるいはロール３４、３５は、基本的にはフリーロール（つまり、ウエブの走行に従動して回転するロール）でよいが、例えば、小さなトルクで助勢駆動可能な構成とすれば、走行中のウエブ２、１２に加わる張力を軽減することが可能になり、張力に起因するウエブ２、１２の波状しわの発生防止をはかることができ、一層望ましい状態での均一塗工を目指すことが可能になる。 Furthermore, the rolls 6 and 7 or the rolls 34 and 35 may basically be free rolls (that is, rolls that rotate following the running of the web). The tension applied to the running webs 2 and 12 can be reduced, the wrinkles of the webs 2 and 12 caused by the tension can be prevented, and a uniform coating in a more desirable state is aimed at. It becomes possible.
　本発明に係るウエブ塗工装置は、均一な塗工が求められるあらゆるウエブの塗工に適用でき、とくに金属箔や樹脂フィルムへの薄膜塗工が求められる用途に好適である。 The web coating apparatus according to the present invention can be applied to any web coating that requires uniform coating, and is particularly suitable for applications requiring thin film coating on metal foil or resin film.
１、１１、２１、３１　ウエブ塗工装置
２、１２　ウエブ
３、１３　空中パス
４、１４　塗布ヘッド
５、１５　スリット状吐出口
８、１９　マニホールド
９、２０　スポンジロール
１６　塗膜
２２　加圧気体
２３、３２　加圧室
２４、３３　チャンバ
３４、３５　小径のロール 1, 11, 21, 31 Web coating device 2, 12 Web 3, 13 Aerial path 4, 14 Coating head 5, 15 Slit discharge port 8, 19 Manifold 9, 20 Sponge roll 16 Coating film 22 Pressurized gas 23, 32 Pressurizing chamber 24, 33 Chamber 34, 35 Small diameter roll

Claims (6)

  1. 　走行中のウエブの表面に、該ウエブの幅方向に延びる塗液供給手段のスリット状吐出口から吐出される所定の塗液を連続的または間欠的に塗布していくウエブ塗工装置において、前記スリット状吐出口を、ウエブの空中パス上に配置するとともに、該ウエブを間にして前記スリット状吐出口に対向する位置に、該ウエブを前記スリット状吐出口に向けてウエブ幅方向に均等な押圧力をもって付勢する付勢手段を設けたことを特徴とするウエブ塗工装置。 In the web coating apparatus for continuously or intermittently applying a predetermined coating liquid discharged from the slit-like discharge port of the coating liquid supply means extending in the width direction of the web to the surface of the running web, The slit-shaped discharge port is disposed on the air path of the web, and the web is directed to the slit-shaped discharge port at a position facing the slit-shaped discharge port with the web interposed therebetween in the web width direction. A web coating apparatus comprising an urging means for urging with a pressing force.
  2. 　前記付勢手段が、ロール表面がスポンジで形成されたスポンジロールから構成されている、請求項１に記載のウエブ塗工装置。 The web coating apparatus according to claim 1, wherein the urging means comprises a sponge roll having a roll surface formed of a sponge.
  3. 　前記付勢手段が、前記スリット状吐出口に対向する位置に設けられ、加圧気体が導入されるウエブに向けて開放された加圧室を有するチャンバから構成されている、請求項１に記載のウエブ塗工装置。 The said urging | biasing means is comprised in the position which opposes the said slit-shaped discharge port, and is comprised from the chamber which has a pressurization chamber open | released toward the web into which pressurized gas is introduce | transduced. Web coating equipment.
  4. 　前記スリット状吐出口のウエブ走行方向前後に、前記ウエブの空中パスの経路を前記スリット状吐出口の先端位置に合わせるレベリングロールが設けられている、請求項１～３のいずれかに記載のウエブ塗工装置。 The web according to any one of claims 1 to 3, wherein a leveling roll for adjusting a path of an air path of the web to a tip position of the slit-like discharge port is provided before and after the slit-like discharge port in the web running direction. Coating equipment.
  5. 　前記ウエブが金属箔からなる、請求項１～４のいずれかに記載のウエブ塗工装置。 The web coating apparatus according to any one of claims 1 to 4, wherein the web is made of a metal foil.
  6. 　前記ウエブが樹脂フィルムからなる、請求項１～４のいずれかに記載のウエブ塗工装置。 The web coating apparatus according to any one of claims 1 to 4, wherein the web is made of a resin film.
PCT/JP2011/068229 2010-08-23 2011-08-10 Web coating device WO2012026330A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9248054B2 (en) 2012-11-27 2016-02-02 The Procter & Gamble Company Methods and apparatus for making elastic laminates
US9265672B2 (en) 2012-11-27 2016-02-23 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9295590B2 (en) 2012-11-27 2016-03-29 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
CN113083616A (en) * 2021-04-07 2021-07-09 深圳市曼恩斯特科技股份有限公司 Coating extrusion die face density external adjusting device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121865A (en) * 1979-03-13 1980-09-19 Fuji Photo Film Co Ltd Coating method
JPS6078664A (en) * 1983-10-07 1985-05-04 Konishiroku Photo Ind Co Ltd Coating method
JPH01310769A (en) * 1988-06-07 1989-12-14 Matsushita Electric Ind Co Ltd Coating device
JPH0344380U (en) * 1989-09-04 1991-04-24
JP2001009337A (en) * 1999-06-30 2001-01-16 Sony Corp Coating apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121865A (en) * 1979-03-13 1980-09-19 Fuji Photo Film Co Ltd Coating method
JPS6078664A (en) * 1983-10-07 1985-05-04 Konishiroku Photo Ind Co Ltd Coating method
JPH01310769A (en) * 1988-06-07 1989-12-14 Matsushita Electric Ind Co Ltd Coating device
JPH0344380U (en) * 1989-09-04 1991-04-24
JP2001009337A (en) * 1999-06-30 2001-01-16 Sony Corp Coating apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9248054B2 (en) 2012-11-27 2016-02-02 The Procter & Gamble Company Methods and apparatus for making elastic laminates
US9265672B2 (en) 2012-11-27 2016-02-23 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9295590B2 (en) 2012-11-27 2016-03-29 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
US9730839B2 (en) 2012-11-27 2017-08-15 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
US9808827B2 (en) 2012-11-27 2017-11-07 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US10729593B2 (en) 2012-11-27 2020-08-04 The Procter & Gamble Company Methods and apparatus for making elastic laminates
CN113083616A (en) * 2021-04-07 2021-07-09 深圳市曼恩斯特科技股份有限公司 Coating extrusion die face density external adjusting device

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