JPH0785784B2 - Liquid ultrafine particle coating method and apparatus - Google Patents
Liquid ultrafine particle coating method and apparatusInfo
- Publication number
- JPH0785784B2 JPH0785784B2 JP61238741A JP23874186A JPH0785784B2 JP H0785784 B2 JPH0785784 B2 JP H0785784B2 JP 61238741 A JP61238741 A JP 61238741A JP 23874186 A JP23874186 A JP 23874186A JP H0785784 B2 JPH0785784 B2 JP H0785784B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- ultrafine particles
- container
- pressurized gas
- aerosol
- 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 - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims description 66
- 239000011882 ultra-fine particle Substances 0.000 title claims description 37
- 238000000576 coating method Methods 0.000 title claims description 18
- 239000000443 aerosol Substances 0.000 claims description 29
- 229920005992 thermoplastic resin Polymers 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000007786 electrostatic charging Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 19
- 239000010408 film Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0012—Apparatus for achieving spraying before discharge from the apparatus
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は液体超微粒子の塗布方法とその装置に係る。TECHNICAL FIELD The present invention relates to a coating method and apparatus for liquid ultrafine particles.
元来、液体の塗布というのは、液体をエアスプレイ又は
エアレススプレイによってミスト化し、それを被塗物面
上に塗布していた。しかしそのミストの粒径は一般に50
ミクロン前後で、特に小さいものでも10ミクロン前後が
限度であった。しかるに最近時にハイテク産業の急成長
により、１ミクロン以下即ちサブミクロン台の塗布の需
要が高まってきた。しかし上述の如く、従来の塗布技術
においては、その需要には応えられなかったのが実情で
ある。Originally, the application of a liquid was to mist the liquid by air spray or airless spray, and apply the mist to the surface of the object to be coated. However, the particle size of the mist is generally 50.
The limit was around 10 microns, especially for small ones. However, recently, due to the rapid growth of the high-tech industry, the demand for coating on the order of 1 micron or less, that is, on the order of submicron has been increased. However, as described above, the conventional coating technology cannot meet the demand.
上述の従来の塗布技術即ち各種のスプレイ方式によって
は、極薄塗布は数ミクロンが限度であって、サブミクロ
ン台の超極薄膜の塗布は不可能であった。Depending on the above-mentioned conventional coating technique, that is, various spray methods, the ultra-thin coating is limited to a few microns, and it is impossible to coat a super-micro thin film on the order of submicrons.
本発明の動機は、極薄膜塗布の限界である数ミクロン台
の壁を破り、サブミクロン台の超極薄膜塗布の技術を確
立することにあった。The motive of the present invention was to break the wall of several micron order, which is the limit of ultra-thin film coating, and to establish a technique of sub-micron order ultra-thin film coating.
上記問題点を解決するため、当発明者は、従来の各種ス
プレイ方式により、噴出気体又は噴出液体の圧力及び温
度の調整、気液の割合、従来の配合及び粘度の調整、液
体の材質の選定等など、あらゆる手段を尽して実験して
きたが、遂に満足すべき結果は得られなかった。In order to solve the above-mentioned problems, the present inventor uses various conventional spray methods to adjust the pressure and temperature of the ejected gas or ejected liquid, the gas-liquid ratio, the conventional composition and viscosity, and the selection of the liquid material. I tried all the means such as etc., but finally I could not get satisfactory results.
そこで、本発明者は、上記問題を解決するためには、上
記の如き従来のスプレイ方式に頼ることは困難であると
判断し、全く別な視野に立って本問題の解決に取組ん
だ。Therefore, the present inventor has determined that it is difficult to rely on the conventional spray method as described above in order to solve the above problem, and has taken an entirely different perspective to solve this problem.
種々新しい方式を模索しているうち、米国の文献にエア
ロゾル発生装置というものを見出した。同装置は特に液
体の超微粒子より成るエアロゾルの生成に用いられるも
のである。While searching for various new methods, I found an aerosol generator in the US literature. The device is used particularly for producing an aerosol composed of liquid ultrafine particles.
上記エアロゾル発生装置の構造について、簡単に説明す
る。第４図を参照されたい。密閉容器72の内側底部に
は、外部よりの加圧気体導入管に接続された散気管73の
噴気孔74が開口している。この開口部より若干上方のレ
ベルまで液体Ｌが補給される。次に比較的低い圧力にて
加圧された加圧空気CA3を散気管73内に導入して、その
噴気孔74より液体中に噴出する。それは気泡B3となり、
上昇して上記液面に達する（第５図）。その気泡は液面
上に出ると薄膜の半球形状B3′となるが（第６図）、同
時に膨脹して破裂する（第７図）。その時、上記薄膜は
超微粒子Pl3となって外気中に飛散する（第８図）。そ
の超微粒子の粒径は、0.1〜0.2ミクロンといわれてい
る。The structure of the aerosol generator will be briefly described. See FIG. At the inner bottom portion of the hermetic container 72, a fumarole 74 of an air diffuser 73 connected to a pressurized gas introduction pipe from the outside is opened. The liquid L is replenished to a level slightly above this opening. Next, the pressurized air CA 3 pressurized at a relatively low pressure is introduced into the air diffusing pipe 73, and is ejected into the liquid from the fumes 74. It becomes bubble B 3 ,
It rises and reaches the above liquid level (Fig. 5). When the bubbles appear on the liquid surface, they form a thin film hemispherical shape B 3 ′ (FIG. 6), but at the same time they expand and burst (FIG. 7). At that time, the thin film becomes ultrafine particles Pl 3 and is scattered into the outside air (Fig. 8). The particle size of the ultrafine particles is said to be 0.1 to 0.2 micron.
当発明者は、上記のエアロゾル内の液体の超微粒子に着
目し、これらを塗布作業に応用することを試みた。しか
しエアロゾル中に浮遊している超微粒子は、なかなか沈
降せず、一時管経っても被塗物面上には付着即ち塗布さ
れなかった。よって上記エアロゾル内にコロナ放電を仕
掛けたところ、静電塗布と同じく、忽ち塗布が行われ、
超極薄の塗膜が得られたのである。The present inventor paid attention to the liquid ultrafine particles in the above-mentioned aerosol and tried to apply them to the coating operation. However, the ultrafine particles floating in the aerosol did not settle easily and were not adhered or coated on the surface of the object to be coated even after passing through the temporary pipe. Therefore, when a corona discharge was set up in the aerosol, like the electrostatic coating, the coating was performed briefly,
An ultra-thin coating film was obtained.
本発明の要旨は、液体の中に散気させ、発生する気泡の
破裂によって生ずる液体の超微粒子を含むエアロゾルを
得た後、これらを直ちに静電気的に塗布する方法であ
る。The gist of the present invention is a method of diffusing gas into a liquid and obtaining an aerosol containing ultrafine particles of the liquid generated by the bursting of generated bubbles, and then immediately electrostatically applying these.
上記の場合には、液体は常温液体であったが、これを加
熱溶融して得られた液状熱可塑性樹脂においても適用す
ることができる。即ち上記液状熱可塑性樹脂をエアロゾ
ル発生装置内に仕込み、加圧気体を散気管内に導入、そ
の噴出孔より溶融樹脂中に吹き込んで気泡を発生させ、
その気泡が液中上昇、液面上にて破裂するときに発生す
る樹脂の超微粒子を得、それらの気体中に分散したエア
ロゾルを得るのである。In the above case, the liquid was a room temperature liquid, but the liquid thermoplastic resin obtained by heating and melting the liquid can also be applied. That is, the liquid thermoplastic resin is charged into the aerosol generator, pressurized gas is introduced into the diffuser tube, and blown into the molten resin through its ejection holes to generate bubbles,
The ultrafine particles of the resin generated when the bubbles rise in the liquid and burst on the liquid surface are obtained, and the aerosol dispersed in those gases is obtained.
上記エアロゾル内には、粒径のサブミクロン台の熱可塑
性樹脂の超微粒子が含まれている。そして分散密度は均
一で、かつ分散密度は比較的低く、またこれら超微粒子
は凝集せず、殆んどが単離した状態であるため、これら
を沈降塗布すれば、極めて薄いかつ均一な塗布を行うこ
とができるのである。しかしこれらサブミクロン台の超
微粒子の自然沈降による塗着には多くの時間を要し、非
生産的であるため、前と同様これらを静電気式に塗布す
るものである。Ultrafine particles of a thermoplastic resin having a particle size in the submicron range are contained in the aerosol. The dispersion density is uniform, the dispersion density is relatively low, and most of these ultrafine particles do not aggregate and are in an isolated state. Therefore, if they are applied by sedimentation, an extremely thin and uniform application can be achieved. It can be done. However, since it takes a lot of time to apply these submicron-sized ultrafine particles by spontaneous precipitation and is unproductive, they are applied electrostatically as before.
なお、上述の方法による作用の円滑をはかるために熱可
塑性樹脂の溶融した状態を維持するために、同装置に加
熱及び保温の諸設備を設けることが必要となる。即ち容
器の外周及び導管、ガン更に気体導入配管上には断熱手
段は勿論、必要箇所に対しては自動温調による加熱の手
段を講ずることが必要である。In order to maintain the molten state of the thermoplastic resin in order to ensure smooth operation by the above-mentioned method, it is necessary to equip the apparatus with various equipment for heating and heat retention. That is, it is necessary to provide not only a heat insulating means on the outer periphery of the container, the conduit, the gun and the gas introducing pipe, but also a heating means by automatic temperature control at a necessary portion.
次の上述の方法による装置の基本的構造について説明す
る。第１図を参照されたい。なお同図は加熱溶融した液
状態熱可塑性樹脂を対象とするものを示し、加熱器、保
温材など設けられているが、常温液体に対しては、これ
らは不要であり、これらを取除いたものとして考えてい
ただきたい。さて、エアロゾル発生装置11は密閉型と
し、その外周はすべて断熱材にて覆われ、かつその底部
には自動温調に連なる加熱器21が設けられる。容器の内
部に収められた散気管13の外方は加圧気体導入管25に接
続し、かつ該導入管の内部には気体加熱用ラジエタ26
を、その外部には断熱材を設ける。上記散気管13の噴出
孔14は、上記容器内側の底部若干上方にて開口せしめ
る。また該容器12の上部には気体排出口15を設け、該口
には導管16を接続し、その導管の端末には静電式ガン17
を接続する。該静電式ガン及び上記導管16の外周部には
断熱材23及び24が、又は該管の内部にはラジエタ式加熱
器27が設けられる。また必要によって、液面検出用静電
容量式センサ29が設けられる。Next, the basic structure of the apparatus according to the above method will be described. See FIG. In addition, the same figure shows the one intended for a liquid state thermoplastic resin that has been heated and melted, and a heater, a heat insulating material, etc. are provided, but these are not necessary for a room temperature liquid, and these have been removed. I would like you to consider it as a thing. Now, the aerosol generating device 11 is of a hermetically sealed type, the outer periphery of which is entirely covered with a heat insulating material, and a heater 21 which is connected to the automatic temperature control is provided at the bottom thereof. The outside of the air diffusing tube 13 housed inside the container is connected to a pressurized gas introducing pipe 25, and a gas heating radiator 26 is provided inside the introducing pipe.
A heat insulating material is provided on the outside. The ejection hole 14 of the air diffuser 13 is opened slightly above the bottom inside the container. Further, a gas discharge port 15 is provided on the upper part of the container 12, a conduit 16 is connected to the port, and an electrostatic gun 17 is connected to the end of the conduit.
Connect. Thermal insulators 23 and 24 are provided on the outer periphery of the electrostatic gun and the conduit 16, or a radiator heater 27 is provided inside the pipe. If necessary, a liquid level detecting capacitance type sensor 29 is provided.
本発明による装置の基本的構造の作用について説明す
る。The operation of the basic structure of the device according to the present invention will be described.
先ず、取扱われる液体が常温液体である場合について説
明する。この場合は、前述の従来の技術の項において述
べたと同じようなステップを経て液体の超微粒子のエア
ロゾルが得られるが、本発明にては、そのようにして得
られたエアロゾルを、その発生装置11より導管16によっ
て導き、その静電式ガン17のノズル18より大気中に吹出
し、その流れの中にコロナ放電を発生させ、それによっ
て上記エアロゾル内の液体の超微粒子を静電気的に被塗
物面上に効果的に塗着せしめるものである。First, the case where the liquid to be handled is a room temperature liquid will be described. In this case, an aerosol of liquid ultrafine particles is obtained through the same steps as described in the section of the prior art described above, but in the present invention, the aerosol thus obtained is generated by a device for generating the aerosol. It is guided by a conduit 16 from 11 and blown into the atmosphere from the nozzle 18 of the electrostatic gun 17 to generate corona discharge in the flow, thereby electrostatically coating the ultrafine particles of liquid in the aerosol. It can effectively be applied to the surface.
次に上記常温液体に代わって常温固体即ち加熱溶融され
た液状の熱可塑性樹脂の場合について述べる。同じく第
１図を参照されたい。密閉容器12上部の材料投入口28よ
り加熱溶融した液状熱可塑性樹脂が注入され、噴出孔14
より若干上方のレベルまで入れられる。そして該容器の
底部に設けられた加熱器21により所定の温度に維持され
る。また外部より供給される加圧気体CAも所定の温度に
加熱され、散気管13内に導入され、その噴気孔14より上
記溶融液体Ｌの中に噴出し、気泡となって液中を上昇、
液面に達し、半球形状の薄い気泡膜を形成する。液面上
に露出した気泡は膨脹し、破裂してその薄い気泡膜は破
片となって外気中に飛散する（以上前述の第５図ないし
第８図ご参照）。その破片は液体の超微粒子となるがそ
の粒径は極めて小さく、サブミクロン台のものとなる。
即ち、該容器12内は、熱可塑性樹脂による超微粒子の気
体中に分散された、いわゆるエアロゾルASとなって充満
される。と同時に断熱容器の保温効果により、上記エア
ロゾルASはその状態を維持しつつ、後続のエアロゾルに
押されて気体排出口15を通って導管16内を移動し、また
同管の保温及び又は自動温調機能付きのラジエタ式加熱
器27によって、適温が保たれ、発生時のエアロゾルの状
態を保ったまま断熱及び又は自動温調された加熱器30付
きの静電式ガン17内を通ってノズル18より大気中に吹出
される（AS）。と同時にコロナピン19と被塗物Ａとの間
に発生するコロナ放電により、荷電された熱可塑性樹脂
の超微粒子は電気力線Ｅにのって被塗物Ａ面上に向って
静電的に付着する。同超微粒子の粒径は、前述の如く、
サブミクロン台であるから、サブミクロンの厚さの超極
薄塗膜が得られる。Next, the case of a liquid-state thermoplastic resin that is solid at room temperature, that is, heated and melted instead of the above-mentioned normal temperature liquid will be described. See also Figure 1. Liquid thermoplastic resin that has been heated and melted is injected from a material inlet 28 at the upper part of the closed container 12, and the injection hole 14
It can be entered to a slightly higher level. Then, a predetermined temperature is maintained by the heater 21 provided at the bottom of the container. The pressurized gas CA supplied from the outside is also heated to a predetermined temperature, introduced into the air diffusing tube 13, and jetted into the molten liquid L from the fumarole 14 to become bubbles and rise in the liquid.
It reaches the liquid surface and forms a hemispherical thin bubble film. The bubbles exposed on the liquid surface expand and burst, and the thin bubble film becomes fragments and scatters in the outside air (see FIGS. 5 to 8 above). The shards become liquid ultrafine particles, but the particle size is extremely small, and is in the submicron range.
That is, the inside of the container 12 is filled with so-called aerosol A S dispersed in a gas of ultrafine particles made of a thermoplastic resin. At the same time, due to the heat retaining effect of the heat insulating container, while maintaining the state, the aerosol A S is pushed by the subsequent aerosol and moves in the conduit 16 through the gas discharge port 15, and also keeps the tube warm and / or automatically. A radiator type heater 27 with a temperature control function maintains a suitable temperature, and the nozzle is passed through an electrostatic gun 17 with a heater 30 that is heat-insulated and / or automatically controlled while maintaining the state of aerosol at the time of generation. It is blown into the atmosphere from 18 (A S ). At the same time, due to the corona discharge generated between the corona pin 19 and the object A to be coated, the charged ultrafine particles of the thermoplastic resin are electrostatically directed toward the surface A of the object A along the lines of electric force E. Adhere to. The particle size of the ultrafine particles is as described above.
Since it is in the submicron range, an ultrathin coating film with a submicron thickness can be obtained.
なお、上記説明においては、加熱溶融した液状熱可塑性
樹脂の注入について述べたが、同容器内底部の加熱器21
を熱可塑性樹脂溶融用とすれば、固形のものを投入する
こともできる。また密閉容器内の液面検出用として静電
容量式センサ29の用いられることが望ましい。理由は可
動部がないため溶融樹脂の固着の心配はなく、また耐熱
性の比較的高いことに因る。In the above description, the injection of the liquid thermoplastic resin heated and melted is described, but the heater 21 at the bottom of the container is
If is used for melting the thermoplastic resin, a solid product can be added. Further, it is desirable to use the capacitance type sensor 29 for detecting the liquid level in the closed container. The reason for this is that there is no moving part, so there is no concern about sticking of the molten resin, and the heat resistance is relatively high.
上記熱可塑性樹脂用としての装置は、電気加熱を使わな
ければ、そのまま常温液体用としても使用することがで
きることは前述した通りである。即ち上記装置は双方兼
用型ということができる。As described above, the device for thermoplastic resin can be used as it is for liquid at room temperature without electric heating. That is, the above device can be said to be a dual-purpose type.
次に特許請求の範囲第３項の液体超微粒子の塗布装置に
ついて述べる。第２図を参照されたい。本エアロゾル発
生装置31の容器32は上部開放型とする。本装置も上述と
同じく常温液体用と熱可塑性用との双方兼用型について
述べる。容器の外周は全面断熱材42が施工され、その底
部には自動温調に接続する加熱器45が設けられる。散気
管33への気体導入管45上には、その内部には気体加熱用
ラジエタ46が、またその外部には断熱材が設けられる。
上記散気管33の噴気孔34は、上記容器32内側の底部若干
上方にて開口せしめる。そして該容器上方は開口型と
し、該開口壁に沿って、ある所要高さの四方包囲の側壁
板36を設け、その外周を断熱材37にて覆う。該四方側壁
板の上方には被塗物A1、保持具38が設けられる。また必
要によって液面検出用の静電容量式センサ49が設けられ
る。Next, a coating device for liquid ultrafine particles according to claim 3 will be described. See FIG. The container 32 of the aerosol generating device 31 is of an upper open type. This apparatus is also described as a dual-purpose type for both normal temperature liquids and thermoplastics, as described above. A full-scale heat insulating material 42 is applied to the outer periphery of the container, and a heater 45 for automatic temperature control is provided at the bottom of the container. A gas heating radiator 46 is provided inside the gas introducing pipe 45 to the air diffusing pipe 33, and a heat insulating material is provided outside thereof.
The fumarole 34 of the air diffuser 33 is opened slightly above the bottom inside the container 32. The upper side of the container is of an opening type, and a side wall plate 36 having a certain required height and surrounded by four sides is provided along the opening wall, and the outer periphery thereof is covered with a heat insulating material 37. An article to be coated A 1 and a holder 38 are provided above the four side wall plates. If necessary, a capacitance type sensor 49 for detecting the liquid surface is provided.
次に同装置の作用について説明する。同じく第２図を参
照されたい。容器32の上方より加熱溶融された液状の熱
可塑性樹脂が供給される。該液状樹脂は必要によって
は、該容器の底部の加熱器45によって所要の温度まで加
熱され維持される。また供給される加圧気体CA1も加熱
ラジエタ46等により所要温度に加熱され、散気管33を通
って噴気孔34より液中に噴出し、気泡となって液中を上
昇、液面に達し、半球形状の薄い気泡膜を形成する。液
面上に露出した気泡は膨脹し、破裂して、その薄い気泡
膜は超微粒子となって外気中に飛散する。その超微粒子
の粒径は極めて小さく、サブミクロン台のものとなる。
即ち該容器32内は熱可塑性樹脂による超微粒子の気体中
に分散された、いわゆるエアロゾルとなって充満され
る。と同時に、断熱容器の保温効果により、上記エアロ
ゾルAS1は、その状態を維持しつつ、後続して発生する
エアロゾルに押されて上昇する。その途上、コロナピン
39によりその上方の被塗物A1に向けてコロナ放電が発生
し、その電気力線E1に沿い、荷電された熱可塑性樹脂の
超微粒子は、その被塗物A1に向かって突進し、その面上
に付着する。同超微粒子の粒径は、サブミクロン台であ
るので、それらより成る塗膜の厚さもサブミクロン台の
超極薄塗膜が得られるのである。Next, the operation of the device will be described. See also FIG. Liquid thermoplastic resin that has been heated and melted is supplied from above the container 32. The liquid resin is optionally heated and maintained at a required temperature by a heater 45 at the bottom of the container. The supplied pressurized gas CA 1 is also heated to a required temperature by the heating radiator 46 and the like, ejected into the liquid from the fumarole 34 through the diffuser pipe 33, becomes bubbles and rises in the liquid, and reaches the liquid surface. , Forming a hemispherical thin bubble film. The bubbles exposed on the liquid surface expand and burst, and the thin bubble film becomes ultrafine particles and scatters into the outside air. The particle size of the ultrafine particles is extremely small, and is in the submicron range.
That is, the inside of the container 32 is filled with what is called an aerosol, which is dispersed in a gas of ultrafine particles made of a thermoplastic resin. At the same time, due to the heat retaining effect of the heat insulating container, the aerosol A S1 is pushed by the aerosol generated subsequently and rises while maintaining its state. On the way, corona pin
Corona discharge is generated toward the article A 1 above it by 39, and along the electric line of force E 1 , the charged ultrafine particles of the thermoplastic resin rush toward the article A 1. , Adhere to the surface. Since the particle size of the ultrafine particles is in the submicron range, the thickness of the coating film made of them is in the submicron range and an ultrathin coating film can be obtained.
次に特許請求の範囲第４項の液体超微粒子の塗布装につ
いて説明する。第３図を参照されたい。本例は前述した
基本構造の装置の静電式ガンノズルに対し、より塗着効
果を上げるため、更に大きな静電気荷電用装置を付加し
たものである。本装置も常温液体と熱可塑性樹脂との兼
用型について述べる。上記静電式ガン57と、その下方を
走る被塗物移動用コンベア67との間に、上側及び四方包
囲型のブース68（又は上側及び両側板型）を設計、更に
該ブース内部には、下方の被塗物に向けた複数のコロナ
ピン69の設けられたものである。Next, the coating device for liquid ultrafine particles according to claim 4 will be described. See FIG. In this example, a larger electrostatic charging device is added to the electrostatic gun nozzle of the above-described basic structure device in order to further improve the coating effect. This device also describes a dual-purpose type of normal temperature liquid and thermoplastic resin. Between the electrostatic gun 57 and a conveyor 67 for moving an object to be coated that runs below the booth 68 (or upper and both side plate type) of an upper side and a four-sided surrounding type, further inside the booth, It is provided with a plurality of corona pins 69 directed toward the object to be coated below.
本装置によれば、ブース68によって超微粒子の飛散は完
全に防止され、かつ複数のコロナピン59,69によるコロ
ナ放電によって、より広範囲に静電気的に超微粒子を被
塗物A2面上に付着せしめることができるのである。According to this device, the booth 68 completely prevents the scattering of ultrafine particles, and the corona discharge by the plurality of corona pins 59, 69 electrostatically causes the ultrafine particles to adhere to the surface A 2 of the object to be coated in a wider area. It is possible.
以上の如く本発明による方法と装置によれば液体超微粒
子の塗布に当って、粒径１ミクロン以下の超微粒子を塗
布し、それによって厚さ１ミクロン以下の極薄膜を、高
い塗着効率をもって塗布することができるのである。As described above, according to the method and apparatus of the present invention, when the liquid ultrafine particles are applied, the ultrafine particles having a particle size of 1 micron or less are applied, whereby an ultra-thin film having a thickness of 1 micron or less is applied with high application efficiency. It can be applied.
第１図は本発明の方法に基づく装置の基本構造の液体超
微粒子の塗布装置の側断面図 第２図は特許請求の範囲
第６項の装置の側断面図 第３図は特許請求の範囲第８
項の装置の側断面図 第４図はエアロゾル発生装置の作
用説明図 第５図は気泡の液面に到達した説明図 第６
図は同上気泡の液面上に気泡膜の発生した状態説明図
第７図は同上気泡の破裂した状態説明図 第８図は同上
破裂直後液体の超微粒子の飛散分散した状態説明図 主要な符号の説明 11,31,51,71……エアロゾル発生装置、12,32,52,72……
容器、13,33,53,73……散気管、14,34,54,74……噴気
孔、15,55,75……気体排出口、16,56,76……排気管、1
7,57……静電式ガン、19,39,59,69……コロナピン、21,
45,61……加熱器、22,23,24,37,42,62,63,64……断熱
材、25,45,65……加圧気体導入管、26,27,30,46,66,70,
71……加熱器、29,49,79……静電容量式センサ、38……
被塗物保持具、67……コンベア、68……ブース、AS,
AS1,AS2……エアロゾル、B,B1,B2,B3……気泡、CA,CA1,
CA2CA3……加圧気体、E,E1,E2……電気力線、L,L1,L2,L
3……液体、Pl3……液体超微粒子FIG. 1 is a side sectional view of a liquid ultrafine particle coating apparatus having a basic structure of the apparatus based on the method of the present invention. FIG. 2 is a side sectional view of the apparatus according to claim 6 and FIG. 8th
Fig. 4 is a side sectional view of the device described in paragraph 4. Fig. 4 is an explanatory view of the action of the aerosol generating device.
The same as above is an explanatory diagram of the state in which a bubble film is generated on the liquid surface of the bubble.
Fig. 7 is the same as above. Fig. 7 is the same as Fig. 8 is the same as above. Fig. 8 is the same as above. Fig. 7 is the same as above. Fig. 7 is an explanatory view of the dispersion and dispersion of ultrafine particles of the liquid. 32,52,72 ……
Vessel, 13,33,53,73 …… Air diffuser, 14,34,54,74 …… Fumarole, 15,55,75 …… Gas outlet, 16,56,76 …… Exhaust pipe, 1
7,57 …… Electrostatic gun, 19,39,59,69 …… Corona pin, 21,
45,61 …… Heater, 22,23,24,37,42,62,63,64 …… Insulation material, 25,45,65 …… Pressurized gas inlet pipe, 26,27,30,46,66 , 70,
71 …… Heater, 29, 49, 79 …… Capacitive sensor, 38 ……
Object holder, 67 …… Conveyor, 68 …… Booth, A S ,
A S1,, A S2 …… Aerosol, B, B 1 , B 2 , B 3 …… Bubbles, CA, CA 1 ,
CA 2 CA 3 …… Pressurized gas, E, E 1 , E 2 …… Electric lines of force, L, L 1 , L 2 , L
3 …… Liquid, Pl 3 …… Liquid ultrafine particles
Claims (4)
（Ｌ）の中に加圧気体（CA）を噴出発泡せしめ、その気
泡（Ｂ）が上昇、液面上にてその気泡膜が破裂し、液面
上の気体中に飛散、分散された液体又は加熱溶融した液
状熱可塑性樹脂超微粒子（Pl）を分散質とするエアロゾ
ル（As）を得、これらを導いてガンノズル（18）より吹
出し、同時にコロナ放電を発生せしめてその流れの中に
ある上記液体又は加熱溶融した液状熱可塑性樹脂超微粒
子（Pl）を荷電し、それらを被塗物面上に塗着せしめる
ことを特徴とする液体超微粒子の塗布方法。1. A pressurized gas (CA) is jetted and foamed into a liquid or a liquid thermoplastic resin (L) which is heated and melted, and the bubbles (B) rise and the bubble film bursts on the liquid surface. , Aerosol (As) containing dispersed or dispersed liquid or heated and melted liquid thermoplastic resin ultrafine particles (Pl) in the gas on the liquid surface is obtained, and these are guided and blown out from the gun nozzle (18), At the same time, a corona discharge is generated to charge the liquid or heat-melted liquid thermoplastic resin ultrafine particles (Pl) in the flow and to coat them on the surface of the object to be coated. Method of applying fine particles.
気体導入管（25）に接続された散気管（13）の噴気孔
（14）の設けられたエアロゾル発生装置（11）に対し、
その密閉容器（12）の上部の気体排出口（15）より、導
管（16）をもって静電式ガン（17）に接続され、更に前
記密閉容器（12）の底部には自動温度調節式の加熱器
（21）が設けられ、前記加圧気体導入管（25）には気体
加熱用のラジエタ（26）がもうけられ、前記導管（16）
にはラジエタ式加熱器（27）が設けられていることを特
徴とする、液体超微粒子の塗布装置。2. An aerosol generator (11) having a closed container (12), at the bottom of which a diffuser pipe (13) connected to a pressurized gas introduction pipe (25) from the outside is provided with fumarole holes (14). As opposed to
The gas discharge port (15) at the top of the closed container (12) is connected to the electrostatic gun (17) through the conduit (16), and the bottom of the closed container (12) is heated by automatic temperature control. A vessel (21) is provided, a gas heating radiator (26) is provided in the pressurized gas introduction pipe (25), and the conduit (16) is provided.
An apparatus for applying liquid ultrafine particles, characterized in that a radiator type heater (27) is provided in the.
りの加圧気体導入管（45）に接続された散気管（33）の
噴気孔（34）の設けられたエアロゾル発生装置（31）に
対し、その容器（32）の上部開放口上に四方包囲型の側
壁板（36）が、また該側壁板の内側には単数又は複数の
静電気荷電用コロナピン（39）が上向きに設けられ、更
に該コロナピンの上方、かつ上記側壁板の上方には被塗
物保持具（38）が設けられ、更に前記容器（32）の底部
には自動温度調節式の加熱器（45）が設けられ、前記加
圧気体導入管（45）には気体加熱用のラジエタ（46）が
設けられていることを特徴とする、液体超微粒子の塗布
装置。3. An aerosol generator in which a fumarole (34) of a diffuser pipe (33) connected to a pressurized gas introduction pipe (45) from the outside is provided at the bottom of an upper open container (32). In contrast to (31), a four-sided enclosing side wall plate (36) is provided on the upper opening of the container (32), and one or more electrostatic charging corona pins (39) are provided inside the side wall plate facing upward. Further, an article holder (38) is provided above the corona pin and above the side wall plate, and an automatic temperature control type heater (45) is provided at the bottom of the container (32). The pressurized gas introduction pipe (45) is provided with a gas heating radiator (46), which is an apparatus for applying liquid ultrafine particles.
気体導入管（65）に接続された散気管（53）の噴気孔
（54）の設けられたエアロゾル発生装置（51）に対し、
その密閉容器（52）の上部の気体排出口（55）より、導
管（56）をもって静電式ガン（57）に接続せしめ、かつ
該ガンより、その下方を走るコンベア（67）又は保持具
上の被塗物（A2）との間に、上側四方包囲型又は上側両
側型のブース（68）が設けられ、更に該ブース内部には
単数又は複数の静電気荷電用コロナピン（59,69）が下
方に向けて設けられ、更に前記密閉容器（12）の底部に
は自動温度調節式の加熱器（61）が設けられ、前記加圧
気体導入管（65）には気体加熱用のラジエタ（66）がも
うけられ、前記導管（56）にはラジエタ式加熱器（70）
が設けられていることを特徴とする、液体超微粒子の塗
布装置。4. An aerosol generating device (51), wherein the airtight hole (54) of a diffuser pipe (53) connected to a pressurized gas introduction pipe (65) from the outside is provided at the bottom of a closed container (52). As opposed to
From the gas discharge port (55) in the upper part of the closed container (52), connect the electrostatic gun (57) with the conduit (56), and on the conveyor (67) or the holder running below the gun. An upper four-sided enclosure type or upper both sides type booth (68) is provided between the article to be coated (A 2 ) and a single or a plurality of electrostatic charging corona pins (59, 69) are provided inside the booth. An automatic temperature control type heater (61) is provided at the bottom of the closed container (12), and the pressurized gas introduction pipe (65) is provided with a radiator (66) for heating gas. ) Is provided, and a radiator heater (70) is provided in the conduit (56).
A coating device for liquid ultrafine particles, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238741A JPH0785784B2 (en) | 1986-10-07 | 1986-10-07 | Liquid ultrafine particle coating method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238741A JPH0785784B2 (en) | 1986-10-07 | 1986-10-07 | Liquid ultrafine particle coating method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6393366A JPS6393366A (en) | 1988-04-23 |
| JPH0785784B2 true JPH0785784B2 (en) | 1995-09-20 |
Family
ID=17034567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61238741A Expired - Fee Related JPH0785784B2 (en) | 1986-10-07 | 1986-10-07 | Liquid ultrafine particle coating method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785784B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0785783B2 (en) * | 1986-10-07 | 1995-09-20 | ノードソン株式会社 | Method and apparatus for applying solid ultrafine particles |
| US5284684A (en) * | 1992-03-03 | 1994-02-08 | Alltrista Corporation | Method and apparatus for coating glassware |
| JP2002086025A (en) * | 2000-09-18 | 2002-03-26 | Kao Corp | Spraying equipment |
| EP2766130B1 (en) | 2011-10-12 | 2020-07-08 | 1366 Technologies Inc. | Apparatus and process for depositing a thin layer of resist on a substrate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2531880A1 (en) * | 1982-08-18 | 1984-02-24 | Commissariat Energie Atomique | METHOD FOR MANUFACTURING THIN LAYERS |
| JPH0785783B2 (en) * | 1986-10-07 | 1995-09-20 | ノードソン株式会社 | Method and apparatus for applying solid ultrafine particles |
-
1986
- 1986-10-07 JP JP61238741A patent/JPH0785784B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6393366A (en) | 1988-04-23 |
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