JP3997587B2 - Coating equipment - Google Patents

Coating equipment Download PDF

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Publication number
JP3997587B2
JP3997587B2 JP03234398A JP3234398A JP3997587B2 JP 3997587 B2 JP3997587 B2 JP 3997587B2 JP 03234398 A JP03234398 A JP 03234398A JP 3234398 A JP3234398 A JP 3234398A JP 3997587 B2 JP3997587 B2 JP 3997587B2
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Japan
Prior art keywords
coating liquid
coating
liquid supply
supply pipe
supplied
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Japanese (ja)
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JPH11216406A (en
Inventor
幸洋 濱口
忠 佐々
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IHI Corp
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IHI Corp
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  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は製紙工場において製造された原紙に塗工液を塗布して塗被加工を施すための塗工装置に関するものである。
【０００２】
【従来の技術】
製紙工場で製造された紙はそのままの形で直ちに使用されることは少なく、それを原紙として更に加工を施すことにより所要の目的に適合する製品としての加工紙とする場合が多い。加工紙には種々のものがあるが、その一つに、塗被加工紙がある。塗被加工紙は、紙の表面の性質を改善する目的で紙の表面に塗工液を塗布させて製造するもので、その装置として塗工装置がある。
【０００３】
塗工装置の一つとして、カーテンコータ形式の塗工装置があるが、このカーテンコータ形式の塗工装置には、塗工液をカーテン状にロール上に流下させて該ロールを介して原紙表面に塗布させるものとか、塗工液をカーテン状に原紙表面に流下させて塗布させるものとかがあるが、図３はその一例として前者のものについて示すもので、原紙１を走行させる上下方向のパスラインを左右から挟むように水平且つ平行に配置された一対の塗布ロール２の各上方位置に、塗工液吐出口となるスリットノズル３を下部に備えた給液ヘッド４を、上記塗布ロール２の表面に非接触となる状態で平行に設置し、塗工液供給源５から塗工液供給管７を通して送給される塗工液６を、分岐管７ａ，７ｂを通してそれぞれ給液ヘッド４に導き、給液ヘッド４のスリットノズル３を通して薄膜カーテン状に一様に流下させて、塗布ロール２上に移し、更に該塗布ロール２間を通過する原紙１の表裏両面に塗布ロール２表面の塗工液６を塗布するようにしてあり、この際、塗工液供給管７のバルブ８の開閉により塗工液６の供給、停止を行うことができるようにすると共に、分岐管７ａ，７ｂのバルブ８ａ，８ｂの開閉により２つの給液ヘッド４からの塗工液６の吐出流量を調整してバランスさせるようにしてある。
【０００４】
【発明が解決しようとする課題】
ところが、上記塗工装置の場合、塗工液６によるカーテンの形成が、塗工液６の液性（粘性）、流量、スリットノズル３の幅に依存しているので、安定したカーテンを形成させるようにすると、塗工液６の流量、濃度に制約を受けることになり、そのため、従来では、少量塗工で済むような製品への適用が困難であり、取り扱える製品の種類が限定される問題がある。
【０００５】
すなわち、少量塗工を実施するためには、塗工液６の濃度を薄くするか、吐出流量を少なくする必要があるが、濃度を薄くすると、下流の乾燥工程での乾燥能力に支障を来すことになり、又、吐出流量を単に少なくすると、カーテン形成が不安定になる問題がある。
【０００６】
そこで、本発明は、塗工液カーテンの安定形成を維持しつつ少量塗工を行うことができるようにして、取り扱える製品の種類を増やすことができるようにしようとするものである。
【０００７】
【課題を解決するための手段】
本発明は、上記課題を解決するために、上下方向のパスラインを左右から挟むように一対の塗布ロールを配置し、該両塗布ロールの上方部に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液を供給するようにし、該各給液ヘッドからそれぞれ塗布ロールの表面へ塗工液をカーテン状に流下させ、上記パスラインを通る原紙の両面に上記両塗布ロール上の塗工液を塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにした構成とする。
【０００８】
気泡発生装置にて微小気泡を混入させた塗工液を給液ヘッドから吐出させると、見掛けの吐出流量を増やすことができるようになるため、塗工液カーテンの安定形成を維持しつつ実質的な吐出流量を減らすことができて、少量塗工を行うことができるようになる。又、塗工液中の微小気泡は原紙が塗布ロール間のニップを通過するときに除去される。
【０００９】
一方、水平方向のパスラインに沿って移動する原紙の上方位置に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液が供給されるようにし、該給液ヘッドからカーテン状に流下させられる塗工液を、上記原紙の表面に塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにし、且つ上記パスラインの塗工液流下位置よりも下流側位置に、パスラインを上下から挟むように一対のスムージングロールを配置した構成としても、少量塗工が可能となり、微小気泡は、原紙がスムージングロールの間を通過するときに除去される。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
【００１１】
図１は本発明の実施の一形態を示すもので、図３に示したと同様な構成としてある塗工装置において、塗工液供給管７の途中に、塗工液６中に微小（微細）気泡９を混入させるようにする気泡発生装置１０を介在設置し、該気泡発生装置１０から給液ヘッド４に気泡が混入した塗工液６を供給するようにして、給液ヘッド４のスリットノズル３から吐出させる塗工液６の見掛けの吐出流量が増加させられるようにする。
【００１２】
上記気泡発生装置１０は、図１に一例を示す如く、上部から流入させた塗工液６を一定レベル貯留して底部から流出させるようにしたタンク１１と、該タンク１１外に設置したモータ１２の駆動によりタンク１１内で回転させられるようにした羽根１３とを有してなり、該羽根１３を、表裏両面にフィン１４を適宜な配置で取り付けた構造として半没液状態となるように配置した構成としてある。
【００１３】
図中１５は塗布ロール２の表面に接触配置したドクターブレードを示す。
【００１４】
原紙１に少量塗工を行う場合には、塗工液供給管７の途中に介在させてある気泡発生装置１０により塗工液６中に微小気泡９を混入させるようにする。この場合、モータ１２の駆動で羽根１３を回転させると、該羽根１３が半没液状態に配置されているいため、タンク１１内において塗工液６中に空気が巻き込まれることにより、微小気泡９が発生させられる。なお、この際、羽根１３の表裏面にはフィン１４が取り付けてあるため、塗工液６中に空気を巻き込み易く、塗工液６中に効率よく微小気泡９を混入させることができる。
【００１５】
微小気泡９が混入した塗工液６を、塗工液供給管７及びその分岐管７ａ，７ｂを通して左右の給液ヘッド４に供給し、それぞれ塗布ロール２へ向けスリットノズル３から吐出させて流下させると、微小気泡９が混入している分だけ見掛けの吐出流量を増やすことができる。したがって、見掛けの吐出流量を、塗工液６のカーテンが乱れない程度まで絞ることにより、実質的に吐出流量を減らすことができて、少量塗工を行うことができる。すなわち、塗工液６の実質的な吐出流量を減らしても、見掛けの吐出流量を一定に保つことができるので、塗工液６のカーテンの安定形成を維持しつつ、従来では困難であった少量塗工を行うことができる。
【００１６】
塗布ロール２から原紙１に塗布された塗工液６中には、上述したように微小気泡９が混入しているが、該微小気泡９は、原紙１が左右の塗布ロール２のニップを通過する際に押し潰されることによって除去される。したがって、原紙１の表面に微小気泡９の跡が表われることはなく、製品品質に支障を及ぼすことはない。
【００１７】
上記において、塗工液６中への微小気泡９の混入量は気泡発生装置１０で調整することができるので、製品の種類に応じた流量での少量塗工が可能となる。そのため、取り扱い対象となる製品の種類を広げることができる。
【００１８】
次に、図２は他の型式の塗工装置への適用例を示すもので、水平方向のパスラインに沿って移動する原紙１の上方部位に給液ヘッド４を配置し、該給液ヘッド４のスリットノズル３から上記原紙１の表面へ向け塗工液６をカーテン状に流下させるようにしてある塗工装置において、塗工液供給源５から上記給液ヘッド４へ向かう塗工液供給管７の途中に、図１に示したと同様な構成としてある気泡発生装置１０を介在設置し、且つ上記パスラインの塗液流下位置よりも下流側位置に、パスラインを上下から挟むように一対のスムージングロール１６を配置したものである。
【００１９】
図２に示す塗工装置の場合には、原紙１の表面に塗布された塗工液６中の微小気泡９を、原紙１が上下のスムージングロール１６間を通過するときに該上下のスムージングロール１６によって除去することができる。
【００２０】
なお、本発明は、上記実施の形態にのみ限定されるものではなく、たとえば、気泡発生装置１０としては、図示し説明した以外の構造のものを採用してもよいこと、その他本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００２１】
【発明の効果】
以上述べた如く、本発明によれば、次の如き優れた効果を発揮する。
(1) 上下方向のパスラインを左右から挟むように一対の塗布ロールを配置し、該両塗布ロールの上方部に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液を供給するようにし、該各給液ヘッドからそれぞれ塗布ロールの表面へ塗工液をカーテン状に流下させ、上記パスラインを通る原紙の両面に上記両塗布ロール上の塗工液を塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにした構成としてあるので、給液ヘッドから吐出させる塗工液に気泡発生装置にて微小気泡を混入させることができ、その結果、見掛けの吐出流量を増やすことができることにより、塗工液カーテンの安定形成を維持しつつ少量塗工を行うことができ、したがって、取り扱うことのできる製品の種類を増やすことができ、又、塗工液中の微小気泡は原紙への塗布時に塗布ロール間のニップを通過するときに除去できるので、製品品質に支障を来す虞はない。
(2) 水平方向のパスラインに沿って移動する原紙の上方位置に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液が供給されるようにし、該給液ヘッドからカーテン状に流下させられる塗工液を、上記原紙の表面に塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにし、且つ上記パスラインの塗工液流下位置よりも下流側位置に、パスラインを上下から挟むように一対のスムージングロールを配置した構成とすることにより、上記(1) 項記載の場合と同様に少量塗工が可能となり、又、塗工液中の微小気泡は下流のスムージングロールにて確実に除去することができる。
【図面の簡単な説明】
【図１】本発明の塗工装置の実施の一形態を示す概略図である。
【図２】他の型式への適用例を示す概略図である。
【図３】従来の塗工装置の一例を示す概略図である。
【符号の説明】
１ 原紙
２ 塗布ロール
４ 給液ヘッド
５ 塗工液供給源
６ 塗工液
７ 塗工液供給管
９ 微小気泡
１０ 気泡発生装置
１６ スムージングロール[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating apparatus for coating a base paper manufactured in a paper mill by applying a coating liquid.
[0002]
[Prior art]
Paper manufactured at a paper mill is rarely used as it is, and is often processed into base paper to be processed paper as a product that meets the required purpose. There are various types of processed paper, one of which is coated paper. The coated paper is produced by applying a coating liquid to the surface of the paper for the purpose of improving the properties of the paper surface, and there is a coating device as the device.
[0003]
As one of the coating devices, there is a curtain coater type coating device. In this curtain coater type coating device, the coating liquid is allowed to flow down onto a roll in the form of a curtain and the surface of the base paper is passed through the roll. Fig. 3 shows an example of the former as an example, and a vertical path through which the base paper 1 travels. A liquid supply head 4 provided with a slit nozzle 3 serving as a coating liquid discharge port at the lower part of each of the upper positions of a pair of application rolls 2 arranged horizontally and in parallel so as to sandwich the line from the left and right, the application roll 2 The coating liquid 6 which is installed in parallel in a non-contact state on the surface of the coating liquid and is fed from the coating liquid supply source 5 through the coating liquid supply pipe 7 to the liquid supply head 4 through the branch pipes 7a and 7b, respectively. Guide the liquid supply head 4 The coating liquid 6 is applied to the surface of the coating roll 2 on both the front and back surfaces of the base paper 1 that is made to flow uniformly through the lit nozzle 3 in the form of a thin film curtain, is transferred onto the coating roll 2, and passes between the coating rolls 2. At this time, the coating liquid 6 can be supplied and stopped by opening and closing the valve 8 of the coating liquid supply pipe 7, and the valves 8a and 8b of the branch pipes 7a and 7b can be opened and closed. The discharge flow rate of the coating liquid 6 from the two liquid supply heads 4 is adjusted and balanced.
[0004]
[Problems to be solved by the invention]
However, in the case of the coating apparatus, since the formation of the curtain by the coating liquid 6 depends on the liquidity (viscosity) of the coating liquid 6, the flow rate, and the width of the slit nozzle 3, a stable curtain is formed. As a result, the flow rate and the concentration of the coating liquid 6 are restricted, so that conventionally, it is difficult to apply to a product that only requires a small amount of coating, and the types of products that can be handled are limited. There is.
[0005]
That is, in order to carry out a small amount of coating, it is necessary to reduce the concentration of the coating liquid 6 or reduce the discharge flow rate. However, if the concentration is decreased, the drying ability in the downstream drying process is hindered. In addition, if the discharge flow rate is simply reduced, there is a problem that the curtain formation becomes unstable.
[0006]
Therefore, the present invention is intended to increase the types of products that can be handled by applying a small amount while maintaining stable formation of a coating liquid curtain.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention has a pair of coating rolls so as to sandwich a vertical pass line from the left and right, and a coating liquid supply source in a liquid supply head installed above the two coating rolls. The coating liquid is supplied from the liquid supply head through the coating liquid supply pipe, the coating liquid is allowed to flow down in a curtain form from the liquid supply heads to the surface of the coating roll, and the both sides of the base paper passing through the pass line are In the coating apparatus that is adapted to apply the coating liquid on both coating rolls, in the middle of the coating liquid supply pipe in order to mix microbubbles in the coating liquid supplied from the coating liquid supply source. gas bubbles generating device interposed installed, a coating liquid containing air bubbles from the bubble generating device, a structure in which the so that flowed down by supplying to the liquid supply head through the coating liquid supply pipe.
[0008]
When the coating liquid mixed with microbubbles is discharged from the liquid supply head by the bubble generator, the apparent discharge flow rate can be increased, so that the coating liquid curtain can be formed stably while maintaining stable formation. The discharge flow rate can be reduced and a small amount of coating can be performed. In addition, the fine bubbles in the coating liquid are removed when the base paper passes through the nip between the coating rolls.
[0009]
On the other hand, a coating liquid is supplied from a coating liquid supply source via a coating liquid supply pipe to a liquid supply head installed at a position above the base paper that moves along the horizontal pass line. In the coating apparatus in which the coating liquid flowing down in the form of a curtain from the head is applied to the surface of the base paper , micro bubbles are mixed in the coating liquid supplied from the coating liquid supply source. the bubble generator in the middle of the coating liquid supply pipe interposed established for the coating liquid containing air bubbles from the bubble generator, to flow down supplied to the liquid supply head through the coating liquid supply pipe In addition, even in a configuration in which a pair of smoothing rolls are arranged so that the pass line is sandwiched from above and below at a position downstream of the pass line coating liquid flow position, a small amount of coating is possible, , Base paper is smoothing low It is removed as it passes between.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 shows an embodiment of the present invention. In a coating apparatus having the same configuration as that shown in FIG. 3, the coating liquid 6 is in the middle of the coating liquid supply pipe 7 and is fine (fine). A bubble generation device 10 for interposing bubbles 9 is interposed, and a coating liquid 6 in which bubbles are mixed is supplied from the bubble generation device 10 to the liquid supply head 4 so that the slit nozzle of the liquid supply head 4 is provided. The apparent discharge flow rate of the coating liquid 6 discharged from 3 is increased.
[0012]
As shown in FIG. 1, the bubble generating device 10 includes a tank 11 that stores a certain level of the coating liquid 6 that flows in from the top and flows out from the bottom, and a motor 12 that is installed outside the tank 11. And a blade 13 that can be rotated in the tank 11 by driving, and the blade 13 is arranged in a semi-immersed state as a structure in which fins 14 are attached to both front and back surfaces in an appropriate arrangement. It is as a configuration.
[0013]
In the figure, reference numeral 15 denotes a doctor blade disposed in contact with the surface of the coating roll 2.
[0014]
When a small amount of coating is performed on the base paper 1, the microbubbles 9 are mixed into the coating liquid 6 by the bubble generator 10 interposed in the middle of the coating liquid supply pipe 7. In this case, when the blade 13 is rotated by driving the motor 12, the blade 13 is disposed in a semi-immersed state, so that air is entrained in the coating liquid 6 in the tank 11, thereby causing the microbubbles 9. Is generated. At this time, since the fins 14 are attached to the front and back surfaces of the blade 13, air can easily be entrained in the coating liquid 6, and the microbubbles 9 can be efficiently mixed into the coating liquid 6.
[0015]
The coating liquid 6 in which the microbubbles 9 are mixed is supplied to the left and right liquid supply heads 4 through the coating liquid supply pipe 7 and its branch pipes 7a and 7b, and is discharged from the slit nozzle 3 toward the coating roll 2 and flows down. As a result, the apparent discharge flow rate can be increased by the amount of minute bubbles 9 mixed therein. Therefore, by reducing the apparent discharge flow rate to such an extent that the curtain of the coating liquid 6 is not disturbed, the discharge flow rate can be substantially reduced and a small amount of coating can be performed. That is, even if the substantial discharge flow rate of the coating liquid 6 is reduced, the apparent discharge flow rate can be kept constant, which is difficult in the past while maintaining the stable formation of the curtain of the coating liquid 6. A small amount can be applied.
[0016]
In the coating liquid 6 applied to the base paper 1 from the coating roll 2, the microbubbles 9 are mixed as described above. The microbubbles 9 pass through the nip of the left and right coating rolls 2. It is removed by being crushed. Therefore, the trace of the microbubbles 9 does not appear on the surface of the base paper 1, and the product quality is not hindered.
[0017]
In the above, since the mixing amount of the fine bubbles 9 in the coating liquid 6 can be adjusted by the bubble generating device 10, a small amount of coating can be performed at a flow rate corresponding to the type of product. Therefore, the types of products to be handled can be expanded.
[0018]
Next, FIG. 2 shows an example of application to another type of coating apparatus. A liquid supply head 4 is arranged above the base paper 1 moving along a horizontal pass line, and the liquid supply head In the coating apparatus in which the coating liquid 6 is made to flow down from the slit nozzle 3 of 4 to the surface of the base paper 1 in the form of a curtain, the coating liquid supply from the coating liquid supply source 5 toward the liquid supply head 4 A bubble generating device 10 having the same configuration as that shown in FIG. 1 is interposed in the middle of the tube 7 and a pair of pass lines are sandwiched from above and below at a position downstream of the coating liquid flow position of the above pass line. The smoothing roll 16 is arranged.
[0019]
In the case of the coating apparatus shown in FIG. 2, when the base paper 1 passes between the upper and lower smoothing rolls 16 through the fine bubbles 9 in the coating liquid 6 applied to the surface of the base paper 1, the upper and lower smoothing rolls. 16 can be removed.
[0020]
The present invention is not limited to the above-described embodiment. For example, as the bubble generation device 10, a structure other than that illustrated and described may be adopted, and other gist of the present invention. Of course, various changes can be made without departing from the scope of the invention.
[0021]
【The invention's effect】
As described above, according to the present invention, the following excellent effects are exhibited.
(1) A pair of application rolls are arranged so that the vertical pass line is sandwiched from the left and right, and the liquid supply head installed above the two application rolls is supplied from the application liquid supply source through the application liquid supply pipe. The coating liquid is supplied, and the coating liquid is made to flow down from the liquid supply heads to the surface of the coating roll in a curtain shape, and the coating liquid on both coating rolls is applied to both surfaces of the base paper passing through the pass line. in coating apparatus that is to be coated, the air bubble generating device interposed placed in the middle of the coating liquid supply pipe for mixed microbubbles in the coating liquid supplied from the above coating liquid supply source , a coating liquid containing air bubbles from the bubble generating device, since a structure in which the so that flowed down by supplying to the liquid supply head through the coating liquid supply pipe, the coating liquid discharged from the liquid supply head Microbubbles can be mixed with a bubble generator. As a result, the apparent discharge flow rate can be increased, so that a small amount of coating can be performed while maintaining the stable formation of the coating liquid curtain, and therefore the types of products that can be handled are increased. In addition, since the fine bubbles in the coating liquid can be removed when passing through the nip between the coating rolls when applied to the base paper, there is no possibility of affecting the product quality.
(2) The coating liquid is supplied from the coating liquid supply source through the coating liquid supply pipe to the liquid supply head installed above the base paper moving along the horizontal pass line. In the coating device that is applied to the surface of the base paper, the coating liquid that is allowed to flow down in a curtain form from the liquid head is mixed with microbubbles in the coating liquid supplied from the coating liquid supply source. the bubble generator interposed placed in the middle of the application liquid supply pipe in order to, a coating liquid containing air bubbles from the bubble generating device, flows down is supplied to the paper-liquid head through the coating liquid supply pipe to be the so that allowed, and a downstream-side position than the coating liquid flows down position of the pass line, with the configuration of arranging the pair of smoothing rolls so as to sandwich the pass line from above and below, the (1) according to claim A small amount can be applied as in the case of Microbubbles in the coating liquid can be reliably removed by the downstream smoothing roll.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a coating apparatus of the present invention.
FIG. 2 is a schematic view showing an application example to another type.
FIG. 3 is a schematic view showing an example of a conventional coating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base paper 2 Application | coating roll 4 Liquid supply head 5 Coating liquid supply source 6 Coating liquid 7 Coating liquid supply pipe 9 Micro bubble 10 Bubble generator 16 Smoothing roll

Claims (2)

上下方向のパスラインを左右から挟むように一対の塗布ロールを配置し、該両塗布ロールの上方部に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液を供給するようにし、該各給液ヘッドからそれぞれ塗布ロールの表面へ塗工液をカーテン状に流下させ、上記パスラインを通る原紙の両面に上記両塗布ロール上の塗工液を塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにした構成を有することを特徴とする塗工装置。A pair of coating rolls are arranged so as to sandwich the vertical pass line from the left and right, and the coating liquid is supplied from the coating liquid supply source to the liquid supply head installed above the both coating rolls via the coating liquid supply pipe. The coating liquid is allowed to flow in the form of curtains from the liquid supply heads to the surface of the coating roll, and the coating liquid on both coating rolls is applied to both sides of the base paper passing through the pass line. are to the coating apparatus, the coating liquid bubble generating device interposed placed in the middle of the coating liquid supply pipe for mixed microbubbles in the coating liquid supplied from the supply source, bubble a coating liquid containing air bubbles from the generator, the coating apparatus characterized by having the configuration in so that flowed down by supplying to the liquid supply head through the coating liquid supply pipe. 水平方向のパスラインに沿って移動する原紙の上方位置に設置した給液ヘッドに塗工液供給源から塗工液供給管を介して塗工液が供給されるようにし、該給液ヘッドからカーテン状に流下させられる塗工液を、上記原紙の表面に塗布するようにしてある塗工装置において、上記塗工液供給源から供給されてくる塗工液中に微小気泡を混入させるため上記塗工液供給管の途中に気泡発生装置を介在設置し、該気泡発生装置から気泡が混入した塗工液を、上記塗工液供給管を通して上記給液ヘッドへ供給して流下させるようにし、且つ上記パスラインの塗工液流下位置よりも下流側位置に、パスラインを上下から挟むように一対のスムージングロールを配置した構成を有することを特徴とする塗工装置。The coating liquid is supplied from the coating liquid supply source to the liquid supply head installed at the upper position of the base paper moving along the horizontal pass line through the coating liquid supply pipe. In the coating apparatus in which the coating liquid that is allowed to flow down in the form of a curtain is applied to the surface of the base paper, the microbubbles are mixed into the coating liquid supplied from the coating liquid supply source. the bubble generator interposed placed in the middle of the coating liquid supply pipe, so that a coating liquid containing air bubbles from the bubble generator, to flow down supplied to the liquid supply head through the coating liquid supply pipe And a pair of smoothing rolls arranged so that the pass line is sandwiched from above and below at a position downstream of the coating liquid flow position of the pass line.
JP03234398A 1998-01-30 1998-01-30 Coating equipment Expired - Fee Related JP3997587B2 (en)

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Application Number Priority Date Filing Date Title
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JP3997587B2 true JP3997587B2 (en) 2007-10-24

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* Cited by examiner, † Cited by third party
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JPH0745023B2 (en) * 1988-12-29 1995-05-17 石川島播磨重工業株式会社 Roll coater
JP3014521B2 (en) * 1991-12-20 2000-02-28 三菱製紙株式会社 Curtain coating device with coating amount control mechanism
JP3204813B2 (en) * 1993-07-30 2001-09-04 住友ゴム工業株式会社 Method and apparatus for applying lubricant for tire beads
JP3165783B2 (en) * 1995-10-06 2001-05-14 株式会社ノリタケカンパニーリミテド Method for forming coating film by foam and apparatus therefor

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