JPS61151243A - Method for pretreating resin molding for coating - Google Patents

Abstract

PURPOSE:To facilitate the removal of dust, etc. and at the same time to obtain a clean surface to be coated without attracting dust, etc., by blasting air against the surface of a plasma-treated resin molding before coating to clean the surface. CONSTITUTION:A resin molding is subjected to a plasma treatment as a pretreatment for coating and air is blasted against the molding before coating to clean its surface. Conventionally, coating has been conducted without plasma treatment by removing dust by wiping, etc., in advance. On the contrary, a molding which has been subjected to the plasma treatment must be coated without wiping, because the treated surface (modified surface) is broken by wiping. Accordingly, dust comes out to the surface and the quality of the coated surface is greatly lowered. By cleaning the surface by air blasting, good coating can be obtd.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、塗装性の悪いポリオレフィン系樹脂等を素材
とする成形品の塗装前処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for pre-painting a molded article made of a polyolefin resin or the like having poor paintability.

〔従来の技術及びその問題点〕[Conventional technology and its problems]

樹脂成形品、特に塗装性の悪いポリオレフィン系樹脂等
を素材とする成形品の塗装性を改善する几め、塗装前に
該成形品をプラズマ処理することは良く知られている。It is well known that a method for improving the paintability of resin molded articles, particularly molded articles made of polyolefin resins and the like that have poor paintability, is to subject the molded articles to plasma treatment before painting.

塗装前処理としてプラズマ処理を行う場合、通常、樹脂
成形品を脱脂洗浄した後プラズマ処理を行い然る後塗装
を行っているが、脱脂洗浄工程で完全に除去できなかっ
たほこり等の汚れや、脱脂洗浄後成形品に付着したほこ
り等は除去できないま＼で塗装工程に運ばれ、塗装され
ている。When plasma treatment is performed as a pre-painting treatment, the resin molded product is usually degreased and cleaned, then plasma treated and then painted. After degreasing and cleaning, the dust adhering to the molded product cannot be removed and is transported to the painting process where it is painted.

即ち、プラズマ処理を施こすことなく塗装する通常の塗
装方法においては、塗装前にほこり等の汚れをチェック
し、ワイプ等で除去した後塗装を行っているが、予めプ
ラズマ処理を施こした場合、核処理面全ワイプすると処
理面（改　　゛質面）が簡単に破壊されるため、ワイプ
にエリはこり等を除去することはできない。In other words, in the normal painting method, which involves painting without applying plasma treatment, dirt such as dust is checked before painting and is removed with a wipe, etc., before painting, but if plasma treatment is applied in advance However, if the entire nuclear treated surface is wiped, the treated surface (modified surface) will be easily destroyed, so it is not possible to remove burrs etc. with a wipe.

はこり等が付着し几ま＼で塗装すると、はこりが浮き出
して塗装面の品質を著るしく低下させ、そのま＼では外
観上市場に出し得る品質レベルのものとは言えず、その
部位を補修塗装する必要がある。そして、例え補修する
にしても補修部分をサンディングし、再度プラズマ処理
、塗装・焼付けを行わなければならないが、この工程の
みではサンディング部分がひけてしまうため、サンディ
ングした部分のみに塗装し肉盛りしなければならず、莫
大な手間がかかる。If you paint with nicks or the like, the nicks will stand out and will significantly reduce the quality of the painted surface. Needs to be repainted. Even if it were to be repaired, the repaired area would have to be sanded, plasma treated, painted, and baked again, but this step alone would cause the sanded area to fade, so paint only the sanded area and build up. It requires a lot of effort and effort.

〔発明の目的〕[Purpose of the invention]

本発明は、前記従来技術の問題点全解消するため、プラ
ズマ処理を行った樹脂成形品に塗装前に空気を吹付ける
ことにエフ、該成形品の表面を清浄にした後、塗装を施
こす方法全提供すること全目的とする。In order to solve all the problems of the prior art, the present invention involves blowing air onto a plasma-treated resin molded product before painting, and after cleaning the surface of the molded product, the painting is applied. The whole purpose is to provide the whole method.

〔発明の構成〕[Structure of the invention]

本発明は、樹脂成形品の塗装前処理としてプラズマ処理
を行った後塗装を施こすまでの間に該樹脂成形品に空気
を吹付けその表面を清浄にすることを特徴とする塗装前
処理方法である。The present invention is a pre-painting treatment method characterized in that after performing plasma treatment as a pre-painting treatment for a resin molded article, air is blown onto the resin molded article to clean the surface thereof before painting. It is.

はこり汚れは、樹脂成形品の水平部に積るだけでなく該
成形品の靜空気により吸い付けられて付着する場合が多
く、この場合付着力が強くほこり等は除去し難いばかり
でなく、除去してもすぐ吸い付けられてしまう。Dust and dirt not only accumulates on the horizontal parts of resin molded products, but are also often attracted by the still air of the molded product and adhere to them. Even if you remove it, it will be absorbed immediately.

我々は、樹脂成形品の塗装前にほこり等の汚れ全除去す
る方法について穫々検討を行っていたところ、プラズマ
処理全行９ことにｘ９樹脂成形品の静電気（帯電電位ン
は除去され、従ってプラズマ処理を施こした樹脂成形品
はエアブロ−によりほこり等全簡単に除去することが可
能であり、しかもエアブｐ−をしても樹脂成形品は帯電
することがなく、はこり等を吸い付ける現象もないこと
を見出だし、本発明をなすに至った。We have been thoroughly investigating ways to remove all dirt such as dust before painting resin molded products, and we have found that plasma treatment in all lines 9 and x9 removes static electricity (electrostatic potential) from resin molded products. All dust and other particles can be easily removed from plasma-treated resin molded products by air blowing, and even with air blowing, resin molded products do not become electrically charged and attract clumps, etc. They discovered that there was no such phenomenon and came up with the present invention.

１００Ｘ１００Ｘ５ｍのポリプロピレン樹脂（ＩＰ−１
５ＯＡ（三菱油化）〕射出成形品全ブランソンＩＰＣ社
製５００５−１１０２０　　＋３ＴＱ、ＲＡＵＴＯ−Ｍ
ＡＴ：［ＯＰＬＡＳＭＡ　８Ｙ８ＴＫＭ　”ｉ用い、反
応カスＯ，、高周波周波数１３．５６　ＭＨ２で下記の
表−１に示す６つの条件下で夫々プラズマ処理を施した
後樹脂成形品の帯電電位を測定した。結果を表−２に示
す。100X100X5m polypropylene resin (IP-1
5OA (Mitsubishi Yuka)] Injection molded products All made by Branson IPC 5005-11020 +3TQ, RAUTO-M
AT: [OPLASMA 8Y8TKM''i was used, and the charged potential of the resin molded product was measured after plasma treatment was performed under each of the six conditions shown in Table 1 below at a reaction waste O, and a high frequency frequency of 13.56 MH2. The results are shown in Table-2.

表　　−１ 表　　−２ １）ｉ−１に示す６つの条件で処理し次成形品全てにつ
いての値 ２】帯電電位は静電気測定器スタチロンＭ（大戸商会］
ｔ−用い、２３℃、５０４ＲＨで測定し友。Table-1 Table-2 1) Values for all molded products processed under the six conditions shown in i-1 2) The charging potential is the static electricity meter Statylon M (Ooto Shokai)
Measured at 23°C and 504RH.

３）干アブロー条件：エア圧カ２ゆｆ／ｎＰ、エア噴出
口１．５　ｒｔａｎφ、ブロ一時間１分、噴出口からの
距離　２０ｍ 異−２に示す測定値は、処理直後〜１週間放置も変らな
かった。上記表−１９表−２に示すデータから樹脂成形
品を、プラズマ処理することによシ靜電気は除去され、
しかもエアブローをしても帯電することがないことがわ
がる。従ってほこり、等が静電気にエフ吸い付けられる
こともない。3) Drying blow conditions: Air pressure: 2yf/nP, air nozzle: 1.5 rtanφ, blowing time: 1 minute, distance from the nozzle: 20m The measured values shown in Annotation-2 are after being left for a week after treatment. There was no change. From the data shown in Table 19 and Table 2 above, static electricity is removed by plasma treatment of the resin molded product.
What's more, it is clear that there is no charge even after air blowing. Therefore, dust and the like will not be attracted to static electricity.

本発明は、前記知見に基いて、樹脂成形品の塗装前処理
としてプラズマ処理を行った後塗装を施すまでの間に、
樹脂成形品に空気を吹き付けてその表面を清浄にするも
のであるが、この空気吹付けは、プラズマ処理を終った
後プラズマ処理装置の中で行ってもよく、またプラズマ
処理後塗装工程への搬送時に行ってもよい。Based on the above-mentioned knowledge, the present invention provides the following steps after plasma treatment is performed as a pre-painting treatment for resin molded products and before painting.
Air is sprayed onto the resin molded product to clean its surface, but this air spraying may be carried out in the plasma processing equipment after the plasma treatment is completed, or it may be carried out during the painting process after the plasma treatment. This may be done during transportation.

以下、図面に基いて本発明の詳細な説明する。Hereinafter, the present invention will be explained in detail based on the drawings.

先づ、第５図に基いて従来のプラズマ処理について説明
す、る。First, conventional plasma processing will be explained based on FIG.

第３図はマイク四波プラズマ装置の概略を示す図であっ
て、■被処理＠ａを処理室１に入れ、■プラズマ化ガス
（反応ガスン供給用バルブ４及びパージガス導入管上の
バルブ７を閉じ、プラズマ化装置のマイクロ波出力ＯＦ
’Ｆの状態でバルブ５を開き真空ポンプヲＯＮとして処
理室内を減圧し、■一定圧（例えばＩ　Ｔｏｒｒ前後）
まで圧力が下がった所でバルブ４を開きマイクロ波出力
−１ｉＯＮとすることにエフ反応ガス全プラズマ化し、
プラズマ化ガス’ｌｊ３．Ｃり被処理物８の表面にあて
、プラズマ処理全行う。所定時間の処理が終了した時点
で、■マイクロ波出力ｉ　ＯＦＦとしバルブ４及び５を
閉じ最後にパージガス導入管用のバルブ７を開いて、処
理室を大気圧に戻す。FIG. 3 is a diagram schematically showing a microphone four-wave plasma apparatus, in which: (1) the object to be processed @a is placed in the processing chamber 1; Close, microwave output OF plasma generator
In the 'F state, open valve 5 and turn on the vacuum pump to reduce the pressure in the processing chamber, and maintain a constant pressure (for example, around I Torr).
When the pressure has dropped to 1, the valve 4 is opened to set the microwave output to -1iON, and the F-reactive gas is completely turned into plasma.
Plasma gas 'lj3. The carbon is applied to the surface of the object 8 to be treated, and the entire plasma treatment is performed. At the end of the treatment for a predetermined period of time, (1) the microwave output is turned off, valves 4 and 5 are closed, and finally valve 7 for the purge gas introduction pipe is opened to return the treatment chamber to atmospheric pressure.

本発明の一実施態様においては、処理室内を大気圧に戻
すため大気又はパージ用ガスを処理室内に導入する際、
このガスを用いて被処理物表面のほこり汚れ等を除去す
るもので、その−例を第１図及び第２図に基いて説明す
る。In one embodiment of the present invention, when introducing atmospheric air or purge gas into the processing chamber to return the interior to atmospheric pressure,
This gas is used to remove dust and dirt from the surface of the object to be treated, and an example thereof will be explained with reference to FIGS. 1 and 2.

第１図、第２図において符号１〜８は第３図の符号と同
じ意味を有し、符号９はパージガスを被処理面に噴射す
るための管を示し、第２図は第１図のＸ　−Ｘ’線にお
ける断面図を示す。In FIGS. 1 and 2, numerals 1 to 8 have the same meanings as the numerals in FIG. A cross-sectional view taken along the line X-X' is shown.

第１図及び第２図において、被処理物をプラズマ処理し
大径パージガスにより処理室全大気圧に戻すに際し、パ
ージガス管を被処理物底面付近まで延ばし、ガス噴出部
９はシャワー状にガスを噴出するように構成されている
。第３図に基いて説明したと同様の■へ■の手順により
被処理物８をプラズマ処理した後処理室をパージする際
パージガス噴出管９から被処理物表面にパージガスを勢
いよく噴射させることにより被処理物表面のほこり汚れ
等を除去し被処理物の表面を清浄にする。In FIGS. 1 and 2, when the object to be processed is plasma-processed and the entire atmospheric pressure in the processing chamber is returned to the atmospheric pressure using a large-diameter purge gas, the purge gas pipe is extended to the vicinity of the bottom of the object, and the gas jetting section 9 emits gas in a shower-like manner. It is configured to erupt. When the processing chamber is purged after the processing object 8 has been subjected to the plasma treatment according to the same procedure as explained based on FIG. Remove dust and dirt from the surface of the object to clean it.

パージガスはほこり等を含まないガスを使用するのが好
ましく、大気をそのま＼パージガスとして利用する場合
には、エアフィルター等を使用してほこり等を除くのが
好ましい。またパージガス導入管上のバルブ７には圧力
調節装置を追加し、パージガス噴出圧力全調整してもよ
く、また、減圧装置用パルプにも排気量調節装置を追加
し、パージガスにエフ被処理物表面より除かれたほこり
等を吸い込むようにしてもよい。この場合、圧力調節装
置と排気量調節装置は何れも処理室内の圧力との相対関
係により調節する必要がある。It is preferable to use a gas that does not contain dust etc. as the purge gas, and when using the atmosphere as it is as the purge gas, it is preferable to remove dust etc. using an air filter or the like. In addition, a pressure regulator may be added to the valve 7 on the purge gas inlet pipe to fully adjust the purge gas ejection pressure.Also, a displacement regulator may be added to the pulp for the decompression device, and the purge gas It is also possible to suck in the dust, etc. that has been removed. In this case, both the pressure adjustment device and the exhaust amount adjustment device need to be adjusted based on the relative relationship with the pressure inside the processing chamber.

また、パージガスによるほこり等の除去効果を高めるた
めに、パージガス噴射管９又は被処理物をパージ中に動
かすようにしてもよい。Further, in order to enhance the effect of removing dust and the like by the purge gas, the purge gas injection pipe 9 or the object to be treated may be moved during purging.

また、パージガスによるほこり等の除去効果を高めるた
め、強制排気口を別途設けてもよい。Further, in order to enhance the effect of removing dust and the like by the purge gas, a forced exhaust port may be provided separately.

つぎに、第４図、第５図、第６図及び第７図に基いて、
プラズマ処理後塗装工程への搬送工程においてエアプロ
ーにより被処理物を清浄にする方法について説明する。Next, based on Fig. 4, Fig. 5, Fig. 6, and Fig. 7,
A method of cleaning the object by air blowing in the step of transporting the object to the painting step after plasma treatment will be explained.

第４図について説明すると、プラズマ処理された樹脂成
形品８は、ベルトコンベヤ１０上の固定冶具１３上に載
置され、矢印の方向に搬送されながら、エア噴出部１２
から噴射されるエアにより樹脂成形品８上のほこシ汚れ
等は除去される。この場合、エア噴出部１２の下部で、
且つコンベアの下に強制排気装置１１を備えるのが好ま
しい。Explaining FIG. 4, the plasma-treated resin molded product 8 is placed on the fixing jig 13 on the belt conveyor 10, and while being conveyed in the direction of the arrow,
Dust, dirt, etc. on the resin molded product 8 are removed by the air jetted from the resin molded product 8. In this case, at the bottom of the air jet section 12,
It is also preferable to provide a forced exhaust device 11 under the conveyor.

また、第５図に示すように、床１４上の固定冶具１３上
に載置されたプラズマ処理後の樹脂成形品上に、手で、
又は自動的に動かせるエア噴出部１２によりエアをブロ
ーするようにしてもよい。この場合にも床の下側に第一
図に示すと同様な強制排気装置を設けるのが好ましい。In addition, as shown in FIG.
Alternatively, the air may be blown by an automatically movable air blowing section 12. In this case as well, it is preferable to provide a forced exhaust device similar to that shown in FIG. 1 below the floor.

また、エア噴出部は、第６図に符号１５で示すように、
樹脂成形品８の形状に沿うような構造のものとするのが
好ましく、この場合、第６図の矢印方向から見た第７図
に示すように、樹脂成形品を矢印の方向に移動させるか
、或いにエア噴出部を樹脂成形品８に沿って移動させる
とよい。In addition, the air jetting portion is, as shown by reference numeral 15 in FIG.
It is preferable to have a structure that follows the shape of the resin molded product 8. In this case, as shown in FIG. 7 when viewed from the direction of the arrow in FIG. 6, the resin molded product may be moved in the direction of the arrow. Alternatively, it is preferable to move the air jet section along the resin molded product 8.

実施例 床面に強制排気装置を備えた第５図に示すようか装置を
用い、エアスプレーガンを使用して、手動でプラズマ処
理終了品をブロー後、塗料Ｒ−２６３（日本ビーケミカ
ル社ンヲ約３５μｍの厚さで塗布、９０℃で２０分焼付
乾燥後の完成塗膜のゴミ付着等による塗膜欠陥の有無を
調査したが、５０個のｐｐ樹脂成形品すべて欠陥なく、
合格率１００％であった。Example Using an apparatus as shown in Fig. 5 equipped with a forced exhaust system on the floor, the plasma-treated product was manually blown using an air spray gun, and then painted with paint R-263 (made by Nippon B Chemical Co., Ltd.). After applying the product to a thickness of about 35 μm and baking it at 90°C for 20 minutes, we investigated whether there were any defects in the finished coating due to dust adhesion, etc., and found that all 50 PP resin molded products had no defects.
The passing rate was 100%.

一方、比較として、本発明の工程金省いたものを５個塗
装したが、そのうち４個に、ゴミ付着による不具合を発
生した。On the other hand, as a comparison, we painted 5 pieces using the method of the present invention in which the process cost was omitted, but 4 of them had problems due to adhesion of dust.

【図面の簡単な説明】[Brief explanation of drawings]

第１図、ｔｇ　２図、第４図、第５図、第６図及び第７
図は本発明方法を説明するための概略図であって、第２
図は第１図のｘ　−ｘ’線における断面図を、第７図は
第６図の矢印方向から見た側面図を示し、第３図は従来
のプラズマ処理装置の概略図を示すものである。 １・・プラズマ処理室、２・・プラズマ化装置、５・・
プラズマ化ガス導入！、４，５．７・・バルブ、６・・
真空ポンプ、８・・被処理物、９・・パージガス噴射管
、１０・・ベルトコンベア、１１・・排気装置、１２．
１５・・エア噴射部、１５・・固定冶具、１４・・末弟
１図 第２図Figure 1, tg Figure 2, Figure 4, Figure 5, Figure 6 and Figure 7
The figure is a schematic diagram for explaining the method of the present invention.
The figure shows a cross-sectional view taken along the line x-x' in Fig. 1, Fig. 7 shows a side view seen from the direction of the arrow in Fig. 6, and Fig. 3 shows a schematic diagram of a conventional plasma processing apparatus. be. 1. Plasma processing chamber, 2. Plasma conversion device, 5.
Introducing plasma gas! , 4, 5.7... valve, 6...
Vacuum pump, 8. Workpiece, 9. Purge gas injection pipe, 10. Belt conveyor, 11. Exhaust device, 12.
15... Air injection part, 15... Fixing jig, 14... Youngest brother 1 figure 2

Claims (1)

【特許請求の範囲】 樹脂成形品の塗装前処理としてプラズマ処 理を行つた後塗装を施すまでの間に該樹脂成形品に空気
を吹き付け、その表面を清浄にすることを特徴とする樹
脂成形品の塗装前処理方法。[Scope of Claims] A resin molded product characterized in that after plasma treatment is performed as a pre-painting treatment for the resin molded product, air is blown onto the resin molded product to clean the surface thereof before painting. Pre-painting treatment method.