JPH08283438A - Improvement in conductivity of resin molded product and electrostatic coating - Google Patents
Improvement in conductivity of resin molded product and electrostatic coatingInfo
- Publication number
- JPH08283438A JPH08283438A JP8398995A JP8398995A JPH08283438A JP H08283438 A JPH08283438 A JP H08283438A JP 8398995 A JP8398995 A JP 8398995A JP 8398995 A JP8398995 A JP 8398995A JP H08283438 A JPH08283438 A JP H08283438A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- molded product
- resin molded
- conductivity
- molding
- 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
- 229920005989 resin Polymers 0.000 title claims abstract description 44
- 239000011347 resin Substances 0.000 title claims abstract description 44
- 238000009503 electrostatic coating Methods 0.000 title description 6
- 238000000034 method Methods 0.000 claims abstract description 20
- -1 nitrogen-containing compound Chemical class 0.000 claims abstract description 19
- 238000003851 corona treatment Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 8
- 238000007610 electrostatic coating method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 abstract description 5
- 238000004898 kneading Methods 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 5
- 229920000178 Acrylic resin Polymers 0.000 abstract description 2
- 239000004925 Acrylic resin Substances 0.000 abstract description 2
- 239000012778 molding material Substances 0.000 abstract description 2
- 229920006122 polyamide resin Polymers 0.000 abstract description 2
- 229920005672 polyolefin resin Polymers 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 125000002947 alkylene group Chemical group 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- NAPSCFZYZVSQHF-UHFFFAOYSA-N dimantine Chemical compound CCCCCCCCCCCCCCCCCCN(C)C NAPSCFZYZVSQHF-UHFFFAOYSA-N 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 229960000735 docosanol Drugs 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- FTBKGTWNWSTGAY-UHFFFAOYSA-N n,n-dibutyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(CCCC)CCCC FTBKGTWNWSTGAY-UHFFFAOYSA-N 0.000 description 1
- IOKYPACLTOWHCM-UHFFFAOYSA-N n,n-diethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(CC)CC IOKYPACLTOWHCM-UHFFFAOYSA-N 0.000 description 1
- YWWNNLPSZSEZNZ-UHFFFAOYSA-N n,n-dimethyldecan-1-amine Chemical compound CCCCCCCCCCN(C)C YWWNNLPSZSEZNZ-UHFFFAOYSA-N 0.000 description 1
- ICZKASVWFUJTEI-UHFFFAOYSA-N n,n-dimethyldocosan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCCCCCN(C)C ICZKASVWFUJTEI-UHFFFAOYSA-N 0.000 description 1
- YWFWDNVOPHGWMX-UHFFFAOYSA-N n,n-dimethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)C YWFWDNVOPHGWMX-UHFFFAOYSA-N 0.000 description 1
- NHLUVTZJQOJKCC-UHFFFAOYSA-N n,n-dimethylhexadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCN(C)C NHLUVTZJQOJKCC-UHFFFAOYSA-N 0.000 description 1
- QMHNQZGXPNCMCO-UHFFFAOYSA-N n,n-dimethylhexan-1-amine Chemical compound CCCCCCN(C)C QMHNQZGXPNCMCO-UHFFFAOYSA-N 0.000 description 1
- UQKAOOAFEFCDGT-UHFFFAOYSA-N n,n-dimethyloctan-1-amine Chemical compound CCCCCCCCN(C)C UQKAOOAFEFCDGT-UHFFFAOYSA-N 0.000 description 1
- SFBHPFQSSDCYSL-UHFFFAOYSA-N n,n-dimethyltetradecan-1-amine Chemical compound CCCCCCCCCCCCCCN(C)C SFBHPFQSSDCYSL-UHFFFAOYSA-N 0.000 description 1
- MMWFTWUMBYZIRZ-UHFFFAOYSA-N n,n-dimethylundecan-1-amine Chemical compound CCCCCCCCCCCN(C)C MMWFTWUMBYZIRZ-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
- Manufacturing Of Electric Cables (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、樹脂成形体の導電性改
良方法および静電塗装方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving electrical conductivity of a resin molding and an electrostatic coating method.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】従来、樹
脂成形体の導電性を改良した後に静電塗装する方法とし
ては、例えば特開昭５０−６６５３８号公報記載のよう
に、樹脂成形体表面に、導電性金属粉末を含有した導電
塗料を塗布する等して導電性のプライマー層を形成し、
導電性をもたせてから静電塗装を行なう方法、または、
カーボンブラック、カーボンファイバー、導電性マイカ
等の無機質系導電物質を樹脂成形体原料に練り込んだ後
に成形し、これに静電塗装を行なう方法等がある。2. Description of the Related Art Conventionally, as a method of electrostatically coating a resin molded body after improving its conductivity, a resin molded body is disclosed, for example, in JP-A-50-66538. Form a conductive primer layer on the surface by applying a conductive paint containing conductive metal powder,
Method of applying electrostatic coating after giving conductivity, or
There is a method in which an inorganic conductive material such as carbon black, carbon fiber or conductive mica is kneaded into a raw material for a resin molded body, molded, and then electrostatically coated.
【０００３】しかしながら、特開昭５０−６６５３８号
公報記載のように、樹脂成形体表面に導電性プライマー
層を形成する場合には、樹脂成形体表面と導電性プライ
マーとの密着性が悪く、これを改良するためには多種類
の導電性プライマー層を多層にわたって形成せざるを得
ない。このことから、導電性や生産性に問題を生ずるだ
けでなく、多種類の導電性プライマーを使用することに
よる塗布の際のロスやコストの面にも問題があった。However, when a conductive primer layer is formed on the surface of a resin molding as described in JP-A-50-66538, the adhesion between the surface of the resin molding and the conductive primer is poor and In order to improve the above, it is inevitable to form many kinds of conductive primer layers in multiple layers. For this reason, there is a problem not only in terms of conductivity and productivity, but also in terms of loss and cost during coating due to the use of various kinds of conductive primers.
【０００４】さらに、カーボンブラック、カーボンファ
イバー、導電性マイカ等の無機質系導電物質を練り込ん
だ成形体に静電塗装する場合には、これらの物質を樹脂
成形体原料に多量に練り込まざるを得ないため、樹脂成
形体の物質劣化が起こりやすく、また、樹脂成形体の着
色により静電塗装表面の色相に影響する等の問題があっ
た。Furthermore, when electrostatically coating a molded body in which an inorganic conductive material such as carbon black, carbon fiber or conductive mica is kneaded, a large amount of these materials must be kneaded into the raw material of the resin molded body. Since it is not obtained, there is a problem that the material deterioration of the resin molded product is likely to occur, and the coloring of the resin molded product affects the hue of the electrostatic coating surface.
【０００５】また最近、特開平３−１０１８７５号公報
記載のポリオキシアルキレンポリオールと可溶性電解質
塩との錯体を、樹脂成形体原料に練り込み、その混練物
を成形し、得られた成形体の表面をプラズマ処理した
後、静電塗装する方法が開示されたが、この方法はプラ
ズマ処理がバッチ式のために生産性に劣り、しかも減圧
下で成形品を処理しなければならないという問題があっ
た。Recently, a complex of a polyoxyalkylene polyol and a soluble electrolyte salt described in JP-A-3-101875 was kneaded into a raw material for a resin molded body, and the kneaded product was molded, and the surface of the molded body obtained. Although a method of electrostatically coating after plasma treatment was disclosed, this method had a problem that the plasma treatment was inferior in productivity due to the batch type and the molded product had to be treated under reduced pressure. .
【０００６】本発明は、このような従来法の欠点を解消
し、樹脂成形体の物性および色相に問題を生ずることな
く、生産性に優れた樹脂成形体の導電性改良方法を提供
すること、さらに、塗着性、付着性、生産性に優れた樹
脂成形体の静電塗装方法を提供することを課題とする。The present invention solves the drawbacks of the conventional method and provides a method for improving the electrical conductivity of a resin molded article which is excellent in productivity without causing problems in the physical properties and hue of the resin molded article. Further, it is an object to provide an electrostatic coating method for a resin molded body which is excellent in coatability, adhesiveness and productivity.
【０００７】[0007]
【課題を解決するための手段】本発明では、特定の含窒
素化合物を、樹脂成形体原料に練り込み、成形した後
に、成形体表面をコロナ放電処理することにより、導電
性が改良されること、および、これにより、成形体表面
を静電塗装特性に適したものに改質し得ることを見出
し、上記課題を解決した。According to the present invention, conductivity is improved by kneading a specific nitrogen-containing compound into a raw material for a resin molded product, molding the product, and subjecting the surface of the molded product to corona discharge treatment. And, by this, it was found that the surface of the molded product can be modified to have a property suitable for electrostatic coating characteristics, and the above problems were solved.
【０００８】すなわち、本発明は、樹脂成形体原料に、
下記一般式（１）で表わされる含窒素化合物を練り込
み、その混練物を成形し、得られた成形体の表面をコロ
ナ放電処理することを特徴とする樹脂成形体の導電性改
良方法である。さらに、本発明は、コロナ放電処理後の
該成形体に荷電を有する塗料を噴霧して付着させること
を特徴とする樹脂成形体の静電塗装方法である。That is, the present invention provides a resin molding material as
A method for improving the electrical conductivity of a resin molded product, which comprises kneading a nitrogen-containing compound represented by the following general formula (1), molding the kneaded product, and subjecting the surface of the resulting molded product to corona discharge treatment. . Furthermore, the present invention is an electrostatic coating method for a resin molded body, which comprises spraying and attaching a paint having a charge to the molded body after the corona discharge treatment.
【０００９】[0009]
【化２】 Embedded image
【００１０】本発明の方法では、成形後、樹脂成形体の
表面層に存在する一般式（１）で表わされる含窒素化合
物が、コロナ放電処理によってより活性化され、一部が
四級化されることにより、成形体の表面抵抗値が低下
し、従来になく著しく導電性の改良された品質のよい樹
脂成形体を生産性よく得ることができる。さらに、コロ
ナ放電処理による表面改質効果も加わって、塗着性に優
れた静電塗装が可能となる。In the method of the present invention, after molding, the nitrogen-containing compound represented by the general formula (1) present in the surface layer of the resin molded body is further activated by corona discharge treatment, and a part thereof is quaternized. As a result, the surface resistance value of the molded product is lowered, and it is possible to obtain with good productivity a resin molded product of high quality with significantly improved conductivity, which has never been seen before. Furthermore, the effect of surface modification by corona discharge treatment is added, and electrostatic coating with excellent coatability becomes possible.
【００１１】一般式（１）において、Ｒ１は炭素数４〜
２０のアルキル基で、好ましくは炭素数６〜１６のアル
キル基であり、特に好ましくは炭素数８〜１４のアルキ
ル基である。In the general formula (1), R 1 has 4 to 4 carbon atoms.
An alkyl group having 20 carbon atoms, preferably an alkyl group having 6 to 16 carbon atoms, and particularly preferably an alkyl group having 8 to 14 carbon atoms.
【００１２】本発明では、樹脂成形体原料として、ポリ
エチレン、ポリプロピレン、ゴム入りポリプロピレン
（エチレン−プロピレン系共重合ゴム含有）等のポリオ
レフィン樹脂、ＡＢＳ樹脂、アクリル樹脂、ポリアミド
樹脂、ポリ塩化ビニル樹脂、ポリカーボネート樹脂、ポ
リアセタール樹脂、フェノール樹脂等の表面抵抗値の高
い樹脂がいずれも使用できる。In the present invention, as a resin molded material, polyolefin resin such as polyethylene, polypropylene, rubber-containing polypropylene (containing ethylene-propylene copolymer rubber), ABS resin, acrylic resin, polyamide resin, polyvinyl chloride resin, polycarbonate is used. Any resin having a high surface resistance value such as resin, polyacetal resin, and phenol resin can be used.
【００１３】一般式（１）で表わされる含窒素化合物と
しては、例えば、Ｎ，Ｎ−ジメチルヘキシルアミン、
Ｎ，Ｎ−ジメチルオクチルアミン、Ｎ，Ｎ−ジメチルデ
シルアミン、Ｎ，Ｎ−ジメチルウンデシルアミン、Ｎ，
Ｎ−ジメチルドデシルアミン、Ｎ，Ｎ−ジエチルドデシ
ルアミン、Ｎ，Ｎ−ジブチルドデシルアミン、Ｎ，Ｎ−
ジメチルテトラデシルアミン、Ｎ，Ｎ−ジメチルヘキサ
デシルアミン、Ｎ，Ｎ−ジメチルオクタデシルアミン、
Ｎ，Ｎ−ジメチルドコシルアミン等のアミン類、Ｎ，Ｎ
−ジメチルアミノ−２−ドデシルアルコール、Ｎ，Ｎ−
ジエチルアミノ−２−ドデシルアルコール、Ｎ，Ｎ−ジ
メチルアミノ−２−テトラデシルアルコール、Ｎ，Ｎ−
ジメチルアミノ−２−オクタデシルアルコール、Ｎ，Ｎ
−ジメチルアミノ−２−ドコシルアルコール等のアルコ
ール類、およびこれらアルコール類のアルキレンオキサ
イド付加物が挙げられる。Examples of the nitrogen-containing compound represented by the general formula (1) include N, N-dimethylhexylamine,
N, N-dimethyloctylamine, N, N-dimethyldecylamine, N, N-dimethylundecylamine, N,
N-dimethyldodecylamine, N, N-diethyldodecylamine, N, N-dibutyldodecylamine, N, N-
Dimethyltetradecylamine, N, N-dimethylhexadecylamine, N, N-dimethyloctadecylamine,
Amines such as N, N-dimethyldocosylamine, N, N
-Dimethylamino-2-dodecyl alcohol, N, N-
Diethylamino-2-dodecyl alcohol, N, N-dimethylamino-2-tetradecyl alcohol, N, N-
Dimethylamino-2-octadecyl alcohol, N, N
-Alcohols such as dimethylamino-2-docosyl alcohol, and alkylene oxide adducts of these alcohols.
【００１４】前記アミン類、アルコール類およびアルコ
ール類のアルキレンオキサイド付加物は、一般に市販さ
れているか、公知の方法にて製造されるものである。付
加されるアルキレンオキサイドとしては、炭素数２〜１
２のアルキレンオキサイドが挙げられ、２種以上のアル
キレンオキサイドが付加されてもよい。The above-mentioned amines, alcohols and alkylene oxide adducts of alcohols are generally commercially available or produced by known methods. The added alkylene oxide has 2 to 1 carbon atoms.
2 alkylene oxides may be mentioned, and two or more kinds of alkylene oxides may be added.
【００１５】上記一般式（１）で表わされる含窒素化合
物の使用量は、樹脂成形体原料１００重量部に対して
０．０１〜１０重量部、好ましくは０．０５〜５重量
部、特に好ましくは０．１〜３重量部である。０．０１
重量部未満だと、できあがった樹脂成形体の導電性が充
分でない。また、１０重量部を超える添加は、導電性の
向上には好ましいが、樹脂との相溶性の点で物性劣化お
よび表面ブリードを生じるので、大きな利点はない。The amount of the nitrogen-containing compound represented by the above general formula (1) used is 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, particularly preferably 100 parts by weight of the resin molded material. Is 0.1 to 3 parts by weight. 0.01
If it is less than the weight part, the electrical conductivity of the resulting resin molded product is insufficient. Further, the addition of more than 10 parts by weight is preferable for improving the electroconductivity, but there is no great advantage because it causes physical property deterioration and surface bleeding in terms of compatibility with the resin.
【００１６】なお、一般式（１）で表わされる含窒素化
合物を樹脂成形体原料に練り込んで添加する際には、本
発明の効果を本質的に変えない限りにおいて、他の帯電
防止剤や加工安定剤等を併用することができる。When the nitrogen-containing compound represented by the general formula (1) is kneaded and added to the raw material for the resin molded product, other antistatic agents and other antistatic agents are used unless the effects of the present invention are essentially changed. A processing stabilizer or the like can be used in combination.
【００１７】一般式（１）で表わされる含窒素化合物を
樹脂成形体原料に練り込む方法としては、二軸式押出し
機式、熱ロール式等の一般的に用いられる方法がいずれ
も使用でき、樹脂成形体の成形方法としても、射出成
形、カレンダー加工、圧縮成形、ＳＭＣ法等がいずれも
使用できる。As a method of kneading the nitrogen-containing compound represented by the general formula (1) into the raw material for the resin molded body, any commonly used method such as a twin-screw type extruder or a heat roll type can be used. As the method for molding the resin molded body, any of injection molding, calendering, compression molding, SMC method and the like can be used.
【００１８】また、コロナ放電処理としては、常圧にお
いて、２つの導体間に高電圧を印加すると発生するコロ
ナを、被処理物（成形体）の表面に接触させる方法を用
いる。その処理条件は、コロナ放電が発生する条件であ
ればよく、例えば、印加電圧が１０〜１００ＫＶ程度
で、処理時間が１００秒以下程度でよい。As the corona discharge treatment, a method is used in which a corona generated when a high voltage is applied between two conductors is brought into contact with the surface of an object to be treated (molded body) at normal pressure. The treatment conditions may be such that corona discharge occurs, for example, the applied voltage is about 10 to 100 KV, and the treatment time is about 100 seconds or less.
【００１９】次に、静電塗装方法としては、電気遠心力
エア、エアレス霧化式塗装機等による方法がいずれも使
用でき、印加電圧は−３０ＫＶ〜−１２０ＫＶ程度であ
る。また、塗料の種類は、ウレタン系、アクリル系、ア
ルキッド系、メラミン系等の通常用いられている塗料が
いずれも使用できる。As the electrostatic coating method, a method using electric centrifugal force air, an airless atomizing type coating machine or the like can be used, and the applied voltage is about -30 KV to -120 KV. As for the type of paint, any of commonly used paints such as urethane, acrylic, alkyd, and melamine can be used.
【００２０】[0020]
【実施例】実施例１〜１８ 表１に示すように、一般式（１）で表わされる含窒素化
合物の所定量を、樹脂成形体原料１ｋｇに添加し、二軸
押出し機を用いて１８０℃で１０分間混練してペレット
を得た。このペレットを射出成形機（新潟鉄工所製、ハ
イパーショット）を用いて成形し、２３０ｍｍ×２３０
ｍｍ×３ｍｍの成形体を得た。この成形体の表面を、印
加電圧３０ＫＶで、２０秒間コロナ放電処理（高周波電
源；春日電機社製、高周波電源装置ＨＦＳ−２０３）
し、テストピースを作成した。直ちに、このテストピー
スの表面抵抗と引張強さを測定した。表面抵抗は、ＹＨ
Ｐ（横河ヒューレットパッカード）社製の超絶縁抵抗計
４３２９Ａ型を用いて、印加電圧５００Ｖで、電圧をか
けてから３０秒後に測定した（湿度６５％、気温２０
℃）。引張強さは、ＪＩＳ Ｋ ７１１３に従って測定
した。Examples Examples 1 to 18 As shown in Table 1, a predetermined amount of a nitrogen-containing compound represented by the general formula (1) was added to 1 kg of a raw material for a resin molded body, and the temperature was 180 ° C. using a twin-screw extruder. And kneaded for 10 minutes to obtain pellets. This pellet was molded using an injection molding machine (Hyper Shot, manufactured by Niigata Iron Works), and 230 mm x 230
A molded product of mm × 3 mm was obtained. The surface of this molded product was subjected to corona discharge treatment for 20 seconds at an applied voltage of 30 KV (high frequency power supply; high frequency power supply HFS-203 manufactured by Kasuga Denki KK).
Then, the test piece was created. Immediately, the surface resistance and tensile strength of this test piece were measured. Surface resistance is YH
Using an ultra-insulation resistance meter 4329A manufactured by P (Yokogawa Hewlett-Packard) Co., Ltd., it was measured at an applied voltage of 500 V and 30 seconds after the voltage was applied (humidity 65%, temperature 20
° C). The tensile strength was measured according to JIS K7113.
【００２１】次に、上記で得たテストピースをアース
し、静電圧−４０ＫＶ、レシプロストローク４００ｍ
ｍ、吹きつけ距離３００ｍｍ、コンベア速度２．２ｍ／
分の塗装機（ランズバーグ・ゲマ社製、μμＢＥＬ３０
φ）で、ウレタン系塗料（日本ビーケミカル社製、Ｒ−
３１５）を静電塗装し、１２０℃で３０分間乾燥後、膜
厚と塗着効率を測定した。Next, the test piece obtained above was grounded, static voltage -40 KV, reciprocating stroke 400 m.
m, spraying distance 300 mm, conveyor speed 2.2 m /
Minute coating machine (manufactured by Ransburg Gemma, μμBEL30
φ), urethane-based paint (R-
315) was electrostatically coated and dried at 120 ° C. for 30 minutes, and then the film thickness and coating efficiency were measured.
【００２２】各測定結果を表１に示す。Table 1 shows the measurement results.
【００２３】比較例１〜６ 含窒素化合物とコロナ放電処理を表２に示すようにした
以外は、実施例１〜１８と同様にして行なった。 Comparative Examples 1 to 6 Comparative examples 1 to 6 were carried out in the same manner as in Examples 1 to 18 except that the corona discharge treatment was as shown in Table 2.
【００２４】各測定結果を表２に示す。Table 2 shows the results of each measurement.
【００２５】表１、２から明らかなように、本発明にお
ける成形体の樹脂物性、導電性、および塗装物の塗着効
率等は優れている。As is clear from Tables 1 and 2, the molded product of the present invention is excellent in resin physical properties, conductivity, and coating efficiency of a coated product.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【発明の効果】本発明によれば、導電性の低い樹脂を使
用して、その樹脂物性および色相を実質的に害すること
なく、著しく導電性を改良した樹脂成形体を得ることが
でき、さらに、塗着効率、表面外観、生産性等に優れた
静電塗装が可能である。According to the present invention, it is possible to obtain a resin molded product having a remarkably improved conductivity by using a resin having a low conductivity, without substantially impairing the physical properties and hue of the resin. It enables electrostatic coating with excellent coating efficiency, surface appearance, and productivity.
Claims (3)
表わされる含窒素化合物を練り込み、その混練物を成形
し、得られた成形体の表面をコロナ放電処理することを
特徴とする樹脂成形体の導電性改良方法。 【化１】 1. A resin-molded raw material, a nitrogen-containing compound represented by the following general formula (1) is kneaded, a kneaded product is molded, and the surface of the molded product obtained is subjected to corona discharge treatment. A method for improving the electrical conductivity of a resin molding. Embedded image
の使用量が、樹脂成形体原料１００重量部に対して０．
０１〜１０重量部であることを特徴とする請求項１記載
の樹脂成形体の導電性改良方法。2. The use amount of the nitrogen-containing compound represented by the general formula (1) is 0.
The method for improving the electrical conductivity of a resin molded article according to claim 1, wherein the amount is 01 to 10 parts by weight.
た樹脂成形体に荷電を有する塗料を噴霧して付着させる
ことを特徴とする樹脂成形体の静電塗装方法。3. An electrostatic coating method for a resin molded body, which comprises spraying and attaching a charged coating material to the resin molded body obtained by the method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8398995A JPH08283438A (en) | 1995-04-10 | 1995-04-10 | Improvement in conductivity of resin molded product and electrostatic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8398995A JPH08283438A (en) | 1995-04-10 | 1995-04-10 | Improvement in conductivity of resin molded product and electrostatic coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08283438A true JPH08283438A (en) | 1996-10-29 |
Family
ID=13817957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8398995A Pending JPH08283438A (en) | 1995-04-10 | 1995-04-10 | Improvement in conductivity of resin molded product and electrostatic coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08283438A (en) |
-
1995
- 1995-04-10 JP JP8398995A patent/JPH08283438A/en active Pending
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