JPH04146936A - Corona discharge treatment - Google Patents
Corona discharge treatmentInfo
- Publication number
- JPH04146936A JPH04146936A JP27446890A JP27446890A JPH04146936A JP H04146936 A JPH04146936 A JP H04146936A JP 27446890 A JP27446890 A JP 27446890A JP 27446890 A JP27446890 A JP 27446890A JP H04146936 A JPH04146936 A JP H04146936A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- molded product
- corona discharge
- resin molded
- humidity
- 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.)
- Pending
Links
- 238000003851 corona treatment Methods 0.000 title claims description 21
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 230000004913 activation Effects 0.000 claims abstract description 12
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 208000028659 discharge Diseases 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 18
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 6
- 230000002950 deficient Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、例えばポリプロピレン等のポリオレフィン系
樹脂からなる樹脂成形品の表面を活性化させるためのコ
ロナ放電処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a corona discharge treatment method for activating the surface of a resin molded article made of a polyolefin resin such as polypropylene.
［従来の技術］
一般に、ポリプロピレン等のポリオレフィン系樹脂は極
性基か少ないので、同樹脂からなる成形品の表面には塗
料、接着剤、印刷剤等が付着しにくい。そのため、前記
樹脂成形品の表面に塗装等を行う場合には、その前処理
としてコロナ放電処理を施して表面を活性化させ、付着
性を向上させている。[Prior Art] Generally, polyolefin resins such as polypropylene have few polar groups, so paints, adhesives, printing agents, etc. are difficult to adhere to the surfaces of molded products made of the same resins. Therefore, when painting or the like is applied to the surface of the resin molded article, a corona discharge treatment is performed as a pretreatment to activate the surface and improve adhesion.
このコロナ放電処理は、対向配置された一対の電極と、
両電極間に配設された搬送手段（例えば、ベルトコンベ
ア）とを備えた処理槽内で行われる。This corona discharge treatment involves a pair of electrodes placed opposite each other,
The treatment is carried out in a processing tank equipped with a conveying means (for example, a belt conveyor) disposed between both electrodes.
すなわち、搬送手段で樹脂成形品を搬送しながら、両電
極間に高電圧を印加してコロナ放電を発生させ、そのコ
ロナ放電により生成したオゾンで樹脂成形品の表面を活
性化させるものである。That is, a high voltage is applied between both electrodes while the resin molded product is transported by the transport means to generate corona discharge, and the surface of the resin molded product is activated with ozone generated by the corona discharge.
前記コロナ放電処理においては、コロナ放電の発生が両
電極間の湿度によって大きく影響を受ける。このため従
来は除湿機を用い、両電極間のコロナ放電が発生してい
る箇所に乾燥した空気を供給するようにしている。In the corona discharge treatment, the occurrence of corona discharge is greatly affected by the humidity between the two electrodes. For this reason, conventionally, a dehumidifier is used to supply dry air to the location where corona discharge is occurring between both electrodes.
［発明が解決しようとする課題］
ところが前記従来技術においては、除湿機が故障したり
外気が高温多湿になったりすると、十分に除湿が行われ
た乾燥空気を処理槽内へ供給できなくなることがある。[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, if the dehumidifier breaks down or the outside air becomes hot and humid, it may become impossible to supply sufficiently dehumidified dry air into the processing tank. be.
すると、両電極間の湿度が高くなってコロナ放電か弱く
なり、樹脂成形品の表面が十分に活性化されないまま次
行程へ送られてしまうという問題があった。This causes a problem in that the humidity between the two electrodes increases, weakening the corona discharge, and causing the surface of the resin molded product to be sent to the next step without being sufficiently activated.
本発明は上述したような事情に鑑みてなされたものであ
り、その目的は樹脂成形品の表面が十分に活性化されな
かったことに起因する不良品の発生を未然に防止するこ
とができるコロナ放電処理方法を提供することにある。The present invention was made in view of the above-mentioned circumstances, and its purpose is to prevent the occurrence of defective products due to insufficient activation of the surface of resin molded products. An object of the present invention is to provide a discharge treatment method.
［課題を解決するための手段］
本発明者は樹脂成形品が両電極間を通過するのに要する
時間と、両電極間の湿度との関係について実験を行った
結果、両者の比率が小さくなる程、樹脂成形品の表面活
性度が低下することを見出した。[Means for Solving the Problems] The present inventor conducted an experiment on the relationship between the time required for a resin molded product to pass between both electrodes and the humidity between both electrodes, and as a result, the ratio of the two becomes small. It has been found that the surface activity of the resin molded article decreases as the temperature increases.
そこで、本発明は対向配置された一対の電極間に高電圧
を印加してコロナ放電を発生させるとともに、搬送手段
にて樹脂成形品を搬送して両電極間を通過させ、前記コ
ロナ放電により生成したオゾンで樹脂成形品の表面を活
性化させるようにしたコロナ放電処理方法において、前
記樹脂成形品が両電極間を通過するのに要する時間と、
両電極間の湿度との比率が予め設定された値よりも小さ
くなったとき、樹脂成形品の表面活性化が不十分として
、両電極間の電圧印加及び樹脂成形品の搬送を停止させ
るようにしたコロナ放電処理方法をその要旨とするもの
である。Therefore, in the present invention, a high voltage is applied between a pair of electrodes arranged opposite each other to generate a corona discharge, and a resin molded article is conveyed by a conveying means to pass between the two electrodes, and the corona discharge is generated by the corona discharge. In a corona discharge treatment method in which the surface of a resin molded article is activated with ozone, the time required for the resin molded article to pass between both electrodes;
When the ratio of the humidity between the two electrodes becomes smaller than a preset value, the surface activation of the resin molded product is considered insufficient, and the voltage application between the two electrodes and the transportation of the resin molded product are stopped. The gist of this paper is a corona discharge treatment method.
［作用］
一対の電極間に高電圧が印加されコロナ放電が発生する
と、このコロナ放電によってオゾンか生成する。この際
、オゾンか樹脂成形品表面の分子と結合して例えばカル
ボニル基が生成され、樹脂成形品の表面を活性化させる
。そして、樹脂成形品が両電極間を通過するのに要する
時間と、コロナ放電中の両電極間の湿度との比率か予め
設定された値よりも小さくなったとき、樹脂成形品の表
面活性化か不十分として、両電極間の電圧印加及び樹脂
成形品の搬送が停止される。[Operation] When a high voltage is applied between a pair of electrodes and corona discharge occurs, ozone is generated by this corona discharge. At this time, ozone combines with molecules on the surface of the resin molded article to generate, for example, carbonyl groups, thereby activating the surface of the resin molded article. When the ratio of the time required for the resin molded product to pass between the two electrodes and the humidity between the two electrodes during corona discharge becomes smaller than a preset value, the surface of the resin molded product is activated. If the voltage is insufficient, the voltage application between the two electrodes and the conveyance of the resin molded product are stopped.
［実施例］
以下、本発明を具体化した一実施例を第１図に基づいて
説明する。本実施例では、自動車用マッドガードの製造
工程の一つである射出成形工程を経て形成された未塗装
の中間成形品１を樹脂成形品とし、同中間成形品１の塗
装に先立ちコロナ放電処理が施されるものとする。この
中間成形品１は、ポリオレフィン系サーモプラスチック
エラストマー（ＴＰＥ）よりなるものである。[Example] Hereinafter, an example embodying the present invention will be described based on FIG. 1. In this example, an unpainted intermediate molded product 1 formed through an injection molding process, which is one of the manufacturing processes for automobile mudguards, is a resin molded product, and prior to painting of the intermediate molded product 1, a corona discharge treatment is performed. shall be administered. This intermediate molded product 1 is made of polyolefin thermoplastic elastomer (TPE).
前記中間成形品ｌにコロナ放電処理を施すための処理装
置は処理槽２を備えている。この処理槽２は前後（図の
左右）両面を開放した箱型状をなし、その内部にはモー
タＭにより周回駆動される搬送手段としてのベルトコン
ベア３が配設されている。A processing apparatus for subjecting the intermediate molded product 1 to corona discharge treatment includes a processing tank 2. The processing tank 2 has a box-like shape with both front and rear sides (left and right in the figure) open, and a belt conveyor 3 as a conveying means driven by a motor M in rotation is disposed inside the processing tank 2.
前記モータＭと、これに電力を供給する電源４との間に
は、第１スイツチ５か接続されている。A first switch 5 is connected between the motor M and a power source 4 that supplies power to the motor M.
第１スイツチ５は、マイコンを内蔵したコントローラ６
の出力側に接続されており、同コントローラ６からの制
御信号によって同第１スイツチ５か閉じられるとモータ
Ｍか作動し、ヘルドコンヘア３のベルト３ａか矢印入方
向へ周回される。そのため、処理槽２の後側開放部分か
らヘルｈａａ上に中間成形品１が供給されると、この中
間成形品ｌはベルト３ａの周回によって前方へ搬送され
る。The first switch 5 is a controller 6 with a built-in microcomputer.
When the first switch 5 is closed in response to a control signal from the controller 6, the motor M is activated and the belt 3a of the heald converter 3 is rotated in the direction indicated by the arrow. Therefore, when the intermediate molded product 1 is supplied onto the health haa from the rear open portion of the processing tank 2, the intermediate molded product 1 is conveyed forward by the rotation of the belt 3a.
処理槽２内においてへルトコンヘア３の上方及び下方に
は一対の電極７，８か対向配置されており、画電極７，
８には電源９と、高圧トランス（図示しない）と、第２
スイツチ１０とか接続されている。第２スイツチ１０は
前記コントローラ６の出力側に接続されており、同コン
トローラ６からの制御信号によってこの第２スイツチ１
０が閉じられると、画電極７，８間に高電圧か印加され
てコロナ放電が発生し、オゾン（０３）か生成するよう
になっている。A pair of electrodes 7 and 8 are disposed facing each other above and below the heat converter 3 in the processing tank 2, and the picture electrodes 7,
8 includes a power supply 9, a high voltage transformer (not shown), and a second
Switch 10 is connected. The second switch 10 is connected to the output side of the controller 6, and is activated by a control signal from the controller 6.
When 0 is closed, a high voltage is applied between the picture electrodes 7 and 8, corona discharge occurs, and ozone (03) is generated.
前記処理槽２の上部には除湿機１１及びブロワ１２か配
設されている。除湿機１１は処理槽２内の湿気を含んだ
空気を吸い込み、同空気を蒸発器の表面に触れさせて空
気中の水分を水滴状にして除湿する。そして、この除湿
された空気はブロワ１２の作動によって処理槽２内へ供
給されるようになっている。A dehumidifier 11 and a blower 12 are disposed above the processing tank 2. The dehumidifier 11 sucks air containing moisture in the processing tank 2, contacts the surface of the evaporator, dehumidifies the air by turning moisture in the air into water droplets, and dehumidifies the air. This dehumidified air is then supplied into the processing tank 2 by the operation of the blower 12.
前記処理槽２内の前部には、湿度計（第−科学株式会社
製 鏡面冷却式露点計 Ｍ−２／１２１１．１（’）
１３か取付けられており、この湿度計１３により画電極
７，８間の湿度Ｃ（ｋｇ／ｒｎ’）か検出される。また
、前記ベルトコンベア３の近傍位置には、そのヘルド３
ａの周回速度Ｓ （ｍ／分）を検出するための速度検出
センサ１４か配設されている。これらの湿度計１３及び
速度検出センサ１４は前記コントローラ６の入力端に接
続されている。なお、コントローラ６の出力側には、湿
度計１３によって検出されたその時々の画電極７，８間
の湿度Ｃを表示する表示器１５か接続されている。A hygrometer (mirror cooling type dew point meter M-2/1211.1(') manufactured by Dai-Kagaku Co., Ltd.) is installed at the front part of the processing tank 2.
This hygrometer 13 detects the humidity C (kg/rn') between the picture electrodes 7 and 8. Further, a heddle 3 is located near the belt conveyor 3.
A speed detection sensor 14 for detecting the rotational speed S (m/min) of a is provided. These hygrometer 13 and speed detection sensor 14 are connected to the input terminal of the controller 6. A display 15 is connected to the output side of the controller 6 to display the humidity C detected by the hygrometer 13 between the picture electrodes 7 and 8 at any given time.
前記コントローラ６に内蔵されたメモリには、ヘルドコ
ンヘア３のベルト３ａの周回速度Ｓ毎に、同ベルト３ａ
上の中間成形品１が画電極７，８間を通過するのに要す
る時間（以後、通過時間という）Ｔか関係付けられて記
憶されている。すなわち、ベルトコンベア３の前後長さ
をｌとすると、Ｔ−４！／Ｓの関係式で求められる通過
時間Ｔか周回速度Ｓ毎に記憶されている。The memory built into the controller 6 stores information about the rotational speed S of the belt 3a of the held conveyor 3.
The time T required for the above intermediate molded product 1 to pass between the picture electrodes 7 and 8 (hereinafter referred to as passing time) is stored in association with the time T required. That is, if the length of the belt conveyor 3 from front to back is l, T-4! The passage time T determined by the relational expression /S is stored for each rotation speed S.
このコントローラ６は、速度検出センサ１４により検出
された周回速度Ｓ （ｍ／分）に対応する通過時間Ｔ（
分）と、前記湿度計１３により検出された湿度Ｃ（ｋｇ
／ｒｎ’）との比率を算出する。そして、コントローラ
６は算出された値と予め設定された設定値Ｂとを比較し
、前者の算出値が後者の設定値Ｂよりも大きい場合には
、前記両スイ・ソチ５，１０を閉じ、算出値が設定値Ｂ
以下である場合には、両スイッチ５，１０を開いて画電
極７゜８間への電圧印加及びベルトコンベア３の周回駆
動を停止させるようになっている。なお、本実施例にお
ける前記設定値Ｂは４６ｒｎ’・分／ ｋｇであり、こ
の設定値Ｂは後記する実験結果に基つき決定した値であ
る。This controller 6 detects a passing time T(
minutes) and the humidity C (kg) detected by the hygrometer 13
/rn'). Then, the controller 6 compares the calculated value with a preset setting value B, and if the former calculated value is larger than the latter setting value B, closes both the sui-sochi 5 and 10, Calculated value is set value B
If the condition is below, both switches 5 and 10 are opened to stop the voltage application between the picture electrodes 7 and 8 and stop the rotation of the belt conveyor 3. Note that the set value B in this example is 46 rn'·min/kg, and this set value B is a value determined based on the experimental results described later.
次に、前記処理装置を用いて中間成形品１の表面にコロ
ナ放電処理を施す方法について説明する。Next, a method of applying corona discharge treatment to the surface of the intermediate molded product 1 using the treatment apparatus will be described.
まず、中間成形品１の表面に確実にコロナ放電処理か行
われるように、同中間成形品１をトリクロロエタンで洗
浄する前処理を行う。このときの洗浄方法としては、■
トリクロロエタンの蒸気（約７４°Ｃ）中に中間成形品
１を所定時間（約２０秒間）放置する方法、■温められ
たトリクロロエタンを中間成形品１に所定時間（約２０
秒間）吹き付ける方法、■・トリクロロエタンの蒸気（
約７４°Ｃ）中に中間成形品１を所定時間（約２０秒間
）放置した後、温められたトリクロロエタンを中間成形
品１に所定時間（約２０秒間）吹き付ける方法かある。First, in order to ensure that the surface of the intermediate molded product 1 is subjected to corona discharge treatment, the intermediate molded product 1 is pretreated by cleaning with trichloroethane. The cleaning method at this time is ■
A method of leaving the intermediate molded product 1 in trichloroethane vapor (about 74°C) for a predetermined time (about 20 seconds);
■・Trichloroethane vapor (
There is a method of leaving the intermediate molded product 1 in a temperature of about 74° C. for a predetermined time (about 20 seconds), and then spraying warmed trichloroethane onto the intermediate molded product 1 for a predetermined time (about 20 seconds).
前記トリクロロエタンによる洗浄か終わったら、中間成
形品１を乾燥（９０°ＣＸ１５分）し、付着しているト
リクロロエタンを蒸発させる。After the washing with trichloroethane is completed, the intermediate molded product 1 is dried (at 90° C. for 15 minutes) to evaporate adhering trichloroethane.
次に、前記中間成形品１を処理装置に投入する。Next, the intermediate molded product 1 is put into a processing device.
そして、処理装置のスタートスイッチ（図示しない）が
オン操作されると、コントローラ６は第１スイツチ５及
び第２スイツチ１０を閉じるための制御信号を出力する
。この制御信号に基つき両スイッチ５．ＸＯか閉じられ
ると、ベルトコンベア３が周回駆動されるとともに、画
電極７，８間に高電圧か印加される。前記電圧印加によ
り画電極７．８間でコロナ放電か発生し、これにともな
いオゾンか生成する。このとき、オゾンが中間成形品１
表面の分子と結合して例えばカルボニル基か生成され、
同中間成形品１の表面が活性化される。When a start switch (not shown) of the processing device is turned on, the controller 6 outputs a control signal for closing the first switch 5 and the second switch 10. Based on this control signal, both switches5. When the XO is closed, the belt conveyor 3 is rotated and a high voltage is applied between the picture electrodes 7 and 8. Corona discharge is generated between the picture electrodes 7 and 8 by the voltage application, and ozone is generated accordingly. At this time, ozone is released into the intermediate molded product 1.
For example, carbonyl groups are generated by bonding with molecules on the surface,
The surface of the intermediate molded product 1 is activated.
前記処理装置の作動時には、画電極７，８間の湿度Ｃか
湿度計１３にて検出されるとともに、ベルトコンベア３
のヘルド３ａの周回速度Ｓが速度検出センサ１４にて検
出される。コントローラ６は、検出されたその時々の湿
度Ｃ及び周回速度Ｓを取り込み、その周回速度Ｓに対応
する通過時間Ｔと湿度Ｃとの比率を算出する。そして、
前記のように算出された値と、設定値Ｂ（この場合４６
耐・分／ ｋｇ ）とを比較する。このとき、算出値が
設定値Ｂよりも大きければ前記両スイッチ５．ＩＯを閉
状態に保持する。When the processing device is in operation, the humidity C between the picture electrodes 7 and 8 is detected by the hygrometer 13, and the humidity C between the picture electrodes 7 and 8 is detected by the hygrometer 13.
The rotational speed S of the heald 3a is detected by the speed detection sensor 14. The controller 6 takes in the detected humidity C and circulating speed S at each time, and calculates the ratio between the passage time T and the humidity C corresponding to the circulating speed S. and,
The value calculated as above and the setting value B (in this case 46
(min./kg). At this time, if the calculated value is larger than the set value B, both the switches 5. Holds IO closed.
ところで、除湿器１１が故障したり、外気が高温多湿に
なったりして、中間成形品１の通過時間Ｔと湿度Ｃとの
比率が設定値Ｂ（４６ｍ’・分／ｋｇ）以下になると、
中間成形品１の表面活性化が不十分として、コントロー
ラ６は第１スイツチ５及び第２スイツチＩＯを開くため
の制御信号を出力する。これらの両スイッチ５．ｌＯが
開かれると、画電極７，８間への電圧印加及びベルトコ
ンベア３の周回が停止される。このため、処理装置の作
動が自動的に停止され、不良品の発生が未然に防止され
る。By the way, if the dehumidifier 11 malfunctions or the outside air becomes hot and humid, and the ratio between the passage time T of the intermediate molded product 1 and the humidity C becomes less than the set value B (46 m'min/kg),
Assuming that the surface activation of the intermediate molded product 1 is insufficient, the controller 6 outputs a control signal to open the first switch 5 and the second switch IO. Both of these switches5. When lO is opened, the application of voltage between the picture electrodes 7 and 8 and the rotation of the belt conveyor 3 are stopped. Therefore, the operation of the processing device is automatically stopped, and the occurrence of defective products is prevented.
な・お、前記コロナ放電処理が正常に行われた中間成形
品ｌは、次行程である塗装工程へ移行される。この工程
で中間成形品１にアクリルウレタン系の塗料が塗布され
、室温で約１０分放置された後、８５℃で３０分間反応
硬化される。すると、中間成形品１の表面に塗膜が形成
される。Note that the intermediate molded product 1 that has been successfully subjected to the corona discharge treatment is transferred to the next step, which is the painting step. In this step, an acrylic urethane paint is applied to the intermediate molded product 1, left to stand at room temperature for about 10 minutes, and then reacted and cured at 85° C. for 30 minutes. Then, a coating film is formed on the surface of the intermediate molded product 1.
ここで、（通過時間Ｔ）／（湿度Ｃ）と、中間成形品１
表面の活性化度との関係について実験を行った。その結
果を表−１に示す。この実験では中間成形品１表面の活
性化度として、同表面に対する塗膜の密着性を調べた。Here, (passage time T)/(humidity C) and intermediate molded product 1
An experiment was conducted to examine the relationship with the degree of surface activation. The results are shown in Table-1. In this experiment, the degree of activation of the surface of the intermediate molded product 1 was determined, and the adhesion of the coating film to the surface was investigated.
この密着性試験は塗膜に基盤の目状に切り込みを入れて
１００個の塗膜片を形成し、これに工業用テープを貼着
し、その後同テープを剥がしたときに、中間成形品１か
ら剥離する塗膜片の数を数えるものである。また、表−
１には参考までに、コロナ放電処理か行われた中間成形
品ｌの表面に水滴を垂らしたときの接触角（０）も併記
した。In this adhesion test, 100 pieces of coating film were formed by making cuts in the pattern of the substrate, and then industrial tape was attached to these pieces, and then when the tape was peeled off, intermediate molded product 1 The number of pieces of paint that peel off from the surface is counted. Also, table -
For reference, 1 also shows the contact angle (0) when a water droplet is dropped on the surface of the intermediate molded product 1 that has been subjected to the corona discharge treatment.
表
表−１から明らかなように、：通過時間Ｔと湿度Ｃとの
比率が４６ｒｎ’・分／ｋｇよりも大きい場合には、塗
膜片が全く剥がれないのに対し、同比率か４６ｍ３１分
／ ｋｇ以下では塗膜片が剥がれてしまった。これは、
前記比率が４６ｒｎ’・分／ ｋｇ以下では、中間成形
品１の表面か十分なレベルまで活性化されていないから
である。従って、前記通過時間Ｔと湿度Ｃとの比率で、
コロナ放電処理による中間成形品１表面の活性化度を正
確に把握することかできる。As is clear from Table 1, if the ratio of transit time T and humidity C is greater than 46rn'min/kg, no paint film flakes will peel off, whereas if the ratio is the same, 46rn'min/kg. / kg or less, pieces of the coating peeled off. this is,
This is because if the ratio is less than 46 rn'·min/kg, the surface of the intermediate molded product 1 is not activated to a sufficient level. Therefore, the ratio between the passage time T and the humidity C is:
It is possible to accurately grasp the degree of activation of the surface of the intermediate molded product 1 due to the corona discharge treatment.
このように本実施例によれば、通過時間Ｔと湿度Ｃとの
比率で中間成形品ｌの表面か十分に活性化されたか否か
を処理中に判定でき、十分に活性化されていない場合に
は、画電極７，８間への電圧印加及び中間成形品ｌの搬
送を停止させるようにしたので、活性化が十分に行われ
なかったことに起因する不良品の発生を未然に防止する
ことができる。As described above, according to this embodiment, it is possible to determine during processing whether or not the surface of the intermediate molded product l has been sufficiently activated based on the ratio of the transit time T and the humidity C, and if it has not been sufficiently activated, In this case, the application of voltage between the picture electrodes 7 and 8 and the conveyance of the intermediate molded product 1 are stopped, thereby preventing the occurrence of defective products due to insufficient activation. be able to.
また、従来のコロナ放電処理方法では、コロナ放電処理
中に樹脂成形品の表面が十分に活性化されたか否かを確
認できないため、処理後に同表面に水等の液体を垂らし
てその接触角を測定したり、樹脂成形品の表面に濡れ指
数標準液を塗布し、その塗布面における液ぎれ状態を観
察したりして、樹脂成形品表面の活性化度を判定してい
た。ところか、本実施例では前述のように、中間成形品
ｌの表面が十分に活性化されたか否かを処理中に判定し
ているので、前記接触角の測定やぬれ試験等の改質確認
作業が不要となる。In addition, with conventional corona discharge treatment methods, it is not possible to confirm whether or not the surface of the resin molded product has been sufficiently activated during the corona discharge treatment. The degree of activation of the surface of a resin molded product was determined by measuring or by applying a standard wettability index solution to the surface of the resin molded product and observing the state of liquid dripping on the coated surface. However, in this example, as described above, it is determined during the treatment whether or not the surface of the intermediate molded product L has been sufficiently activated, so that modification confirmation such as the contact angle measurement and wetting test is performed. No work is required.
なお、本発明は前記実施例の構成に限定されるものでは
なく、例えば以下のように発明の趣旨から逸脱しない範
囲で任意に変更してもよい。It should be noted that the present invention is not limited to the configuration of the embodiments described above, and may be modified as desired without departing from the spirit of the invention, for example, as described below.
（１）前記実施例では画電極７，８間への電圧印加及び
ベルトコンベア３の駆動を停止させるときの下限値のみ
を設定したか、上限値も併せて設定してもよい。このよ
うにすれは不良品の発生をさらに確実に防止できる。(1) In the embodiment described above, only the lower limit value for stopping the voltage application between the picture electrodes 7 and 8 and the driving of the belt conveyor 3 was set, but the upper limit value may also be set. In this way, the occurrence of defective products can be more reliably prevented.
（２）本発明は前記マツ）・カート以外にも、自動車用
バンパ、自動車用モール等の成形後に塗装、接着、印刷
等か必要な樹脂成形品を対象物とすることができる。(2) In addition to the aforementioned pine carts, the present invention can also target resin molded products that require painting, adhesion, printing, etc. after molding, such as automobile bumpers and automobile moldings.
（３）本発明を、特願平２−９８９６７号（電極間のオ
ゾン濃度と通過時間との積に基づき電圧印加等を制御）
、特願平２−９８９６８号（コロナ放電時の騒音レベル
と通過時間との積に基づき電圧印加等を制御）及び特願
平２−１８５５９６号（両電極間の輝度と通過時間との
積に基づき電圧印加等を制御）で提案したコロナ放電処
理方法と適宜組み合わせて具体化してもよい。(3) The present invention is applied to Japanese Patent Application No. 2-98967 (controlling voltage application, etc. based on the product of ozone concentration between electrodes and passage time)
, Japanese Patent Application No. 2-98968 (controls voltage application, etc. based on the product of noise level and passing time during corona discharge) and Japanese Patent Application No. 2-185596 (controls voltage application based on the product of the brightness between the two electrodes and the passing time). The corona discharge treatment method proposed in the above (controlling voltage application, etc.) may be used in combination as appropriate.
［発明の効果］
以上詳述したように、本発明のコロナ放電処理方法によ
れは、樹脂成形品の表面が十分に活性化されなかったこ
とに起因する不良品の発生を未然に防止することができ
、コロナ放電処理後に接触角を測定したり、濡れ指数標
準液の液ぎれ状態を観察したりするという活性化の程度
を確認する作業が不要になる。[Effects of the Invention] As detailed above, the corona discharge treatment method of the present invention can prevent the occurrence of defective products due to insufficient activation of the surface of resin molded products. This eliminates the need to confirm the degree of activation by measuring the contact angle after corona discharge treatment or observing the dripping state of the standard wetting index solution.
第１図は本発明を具体化した一実施例を示し、コロナ放
電処理を行うために用いられる処理装置の構成を示す図
である。
■・・・樹脂成形品としての中間成形品、３・・・搬送
手段としてのベルトコンヘア、７，８・・・電極、Ｃ・
・・湿度、Ｔ・・・通過時間。
特許出願人 豊田合成株式会社FIG. 1 shows an embodiment of the present invention, and is a diagram showing the configuration of a processing apparatus used for performing corona discharge treatment. ■... Intermediate molded product as a resin molded product, 3... Belt conhair as a conveyance means, 7, 8... Electrode, C.
...humidity, T...passage time. Patent applicant Toyoda Gosei Co., Ltd.
Claims (1)
印加してコロナ放電を発生させるとともに、搬送手段（
３）にて樹脂成形品（１）を搬送して両電極（７、８）
間を通過させ、前記コロナ放電により生成したオゾンで
樹脂成形品（１）の表面を活性化させるようにしたコロ
ナ放電処理方法において、 前記樹脂成形品（１）が両電極（７、８）間を通過する
のに要する時間と、両電極（７、８）間の湿度との比率
が予め設定された値よりも小さくなったとき、樹脂成形
品（１）の表面活性化が不十分として、両電極（７、８
）間の電圧印加及び樹脂成形品（１）の搬送を停止させ
るようにしたことを特徴とするコロナ放電処理方法。[Claims] 1. A high voltage is applied between a pair of electrodes (7, 8) arranged opposite to each other to generate a corona discharge, and a conveying means (
3), transport the resin molded product (1) and attach it to both electrodes (7, 8).
In the corona discharge treatment method, the surface of the resin molded product (1) is activated with ozone generated by the corona discharge by passing the resin molded product (1) between the electrodes (7, 8). When the ratio of the time required to pass through the electrodes and the humidity between the electrodes (7, 8) becomes smaller than a preset value, the surface activation of the resin molded product (1) is deemed insufficient. Both electrodes (7, 8
) and stopping the conveyance of the resin molded product (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27446890A JPH04146936A (en) | 1990-10-11 | 1990-10-11 | Corona discharge treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27446890A JPH04146936A (en) | 1990-10-11 | 1990-10-11 | Corona discharge treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04146936A true JPH04146936A (en) | 1992-05-20 |
Family
ID=17542114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27446890A Pending JPH04146936A (en) | 1990-10-11 | 1990-10-11 | Corona discharge treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04146936A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008505245A (en) * | 2004-07-01 | 2008-02-21 | スリーエム イノベイティブ プロパティズ カンパニー | Atmospheric pressure nitrogen dielectric-methods, systems, and polymeric materials related to consideration of H2O levels present in barrier discharge |
| JP2015195113A (en) * | 2014-03-31 | 2015-11-05 | 芝浦メカトロニクス株式会社 | Surface treatment apparatus and surface treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268746A (en) * | 1987-04-24 | 1988-11-07 | Toyoda Gosei Co Ltd | Corona discharge treatment device |
-
1990
- 1990-10-11 JP JP27446890A patent/JPH04146936A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268746A (en) * | 1987-04-24 | 1988-11-07 | Toyoda Gosei Co Ltd | Corona discharge treatment device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008505245A (en) * | 2004-07-01 | 2008-02-21 | スリーエム イノベイティブ プロパティズ カンパニー | Atmospheric pressure nitrogen dielectric-methods, systems, and polymeric materials related to consideration of H2O levels present in barrier discharge |
| JP2012052120A (en) * | 2004-07-01 | 2012-03-15 | Three M Innovative Properties Co | Method, system, and polymer substance relating to consideration of h2o levels present within an atmospheric-pressure nitrogen dielectric-barrier discharge |
| JP2015195113A (en) * | 2014-03-31 | 2015-11-05 | 芝浦メカトロニクス株式会社 | Surface treatment apparatus and surface treatment method |
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