JPH0593184A - Antistatic coating agent, treatment of molding therewith and molding treated therewith - Google Patents
Antistatic coating agent, treatment of molding therewith and molding treated therewithInfo
- Publication number
- JPH0593184A JPH0593184A JP28054091A JP28054091A JPH0593184A JP H0593184 A JPH0593184 A JP H0593184A JP 28054091 A JP28054091 A JP 28054091A JP 28054091 A JP28054091 A JP 28054091A JP H0593184 A JPH0593184 A JP H0593184A
- Authority
- JP
- Japan
- Prior art keywords
- antistatic
- coating agent
- coating
- carbon powder
- antistatic coating
- 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.)
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、フッ素系樹脂製の成形
物品もしくはフッ素系樹脂からなる被覆層を有する各種
物品の帯電防止を行うのに利用される塗装剤と、これを
用いた帯電防止処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating agent used for antistatic treatment of a molded article made of a fluororesin or various articles having a coating layer made of a fluororesin, and an antistatic agent using the same. Regarding processing method.
【0002】[0002]
【従来の技術】フッ素系樹脂は、耐薬品性、耐熱性、非
粘着性、耐水性、電気的特性等に優れることから、様々
な物品の成形素材、ライニング材等として広く使用され
ているが、高い絶縁性を有するために帯電を生じ易いと
いう難点がある。従って、有機溶剤の如き可燃性液体や
可燃性ガスに接触する器材に適用した場合、器材自体な
らびに接触流体が帯電して放電による引火・爆発の危険
性があり、また分野によっては静電気による物品表面へ
の塵埃付着が大きな問題となる場合があり、帯電防止は
大きな課題となっている。2. Description of the Related Art Fluorine-based resins are widely used as molding materials and lining materials for various articles because of their excellent chemical resistance, heat resistance, non-adhesiveness, water resistance, electrical characteristics, etc. However, since it has a high insulating property, there is a drawback that charging is likely to occur. Therefore, when applied to equipment that comes into contact with flammable liquids or flammable gases such as organic solvents, there is a risk of ignition and explosion due to discharge due to the equipment itself and the contact fluid being charged. The adhesion of dust to the surface may be a serious problem, and the prevention of static charge is a major problem.
【0003】この帯電防止の手段としては、フッ素系樹
脂中にカーボンブラック等の炭素粉末を混入して導電性
を付与することが考えられるが、充分な導電性を得るた
めに炭素粉末の配合量を多くする必要があり、それによ
り強度等の機械的特性やフッ素系樹脂本来の性能が低下
する上、高価な炭素粉末の多量使用により材料コストが
非常に高く付き、実用性に乏しい。そこで、ペースト押
出法や溶融押出法にて製作されるフッ素系樹脂製の耐薬
品性チューブでは、二層構造としてその内層側に炭素粉
末を配合することにより、機械的特性やフッ素系樹脂本
来の性能をある程度確保すると共に全体としての炭素粉
末の使用量が少ない形で導電性を付与したものが登場し
ている。As a means for preventing this electrification, it is conceivable that carbon powder such as carbon black is mixed into the fluororesin to impart conductivity, but in order to obtain sufficient conductivity, the amount of carbon powder blended However, the mechanical properties such as strength and the original performance of the fluororesin are deteriorated, and the large amount of expensive carbon powder causes a very high material cost, resulting in poor practicability. Therefore, in the chemical resistant tube made of a fluororesin produced by the paste extrusion method or the melt extrusion method, the carbon powder is blended on the inner layer side as a two-layer structure to improve the mechanical properties and the original characteristics of the fluororesin. Some have been made to have conductivity, while ensuring a certain level of performance and using a small amount of carbon powder as a whole.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記の
二層構造とした耐薬品性チューブは製法上から用途が配
管用パイプや配管内装材等に限られ、配管系においても
エルボ、チーズ、レデュサー、各種バルブ等の非線形部
分には適用できず、また特殊な製造装置が必要となるの
で設備コストが高く付くと共に、導電性も充分とは言え
ない。However, the chemical resistance tube having the above-mentioned two-layer structure is limited to the pipe for piping and the pipe interior material from the manufacturing method, and the elbow, cheese, reducer, Since it cannot be applied to non-linear parts such as various valves, and requires special manufacturing equipment, the equipment cost is high and the conductivity is not sufficient.
【0005】しかして、フッ素系樹脂が使用される分野
で帯電防止を要するものは、上記配管系以外に、混合,
反応,貯留等に使用される塔槽類やタンク類、これらの
内部に装備される攪拌器,ストレーナー,ディストリビ
ューターを始めとする各種内装器材、流体用コンテナ
等、極めて多岐にわたっているが、これら全般に有効な
帯電防止手段がない現状である。また、フッ素系樹脂を
使用した既存の器材・装置に対して二次的に帯電防止を
施す手段も見出されていない。However, in the field where fluorocarbon resins are used, those requiring antistatic properties are used in addition to the above-mentioned piping system, in addition to mixing,
There are a wide variety of tower tanks and tanks used for reactions, storage, etc., various internal equipment such as stirrers, strainers, distributors, etc. installed inside these, fluid containers, etc. The current situation is that there is no effective antistatic means. Further, there has been found no means for secondarily providing antistatic protection to existing equipment and devices using a fluororesin.
【0006】本発明は、上述の状況に鑑み、フッ素系樹
脂を使用する器材や装置等の形状・構造に関係なく、ま
た該フッ素系樹脂の特性・性能を損なうことなく、簡単
に且つ安価に優れた帯電防止機能を付与でき、しかも既
存のフッ素系樹脂を使用した各種の器材・装置に対して
も二次的に帯電防止を施すことを可能とする、帯電防止
用塗装剤と帯電防止処理方法を提供することを目的とし
ている。In view of the above situation, the present invention is simple and inexpensive, regardless of the shape and structure of equipment and devices using a fluororesin and without impairing the characteristics and performance of the fluororesin. An antistatic coating agent and antistatic treatment that can impart an excellent antistatic function and that can also secondarily prevent the static charge on various equipment and devices that use existing fluorocarbon resins. It is intended to provide a way.
【0007】[0007]
【課題を解決するための手段】本発明の帯電防止用塗装
剤は、上記目的を達成するために、アモルファスフルオ
ロポリマーをフッ素系溶剤に溶解した溶液中に炭素粉末
が配合されてなる構成を要旨とするものである。In order to achieve the above object, the antistatic coating composition of the present invention has a constitution in which carbon powder is mixed in a solution in which an amorphous fluoropolymer is dissolved in a fluorine-based solvent. It is what
【0008】また、本発明では、特に上記塗装剤とし
て、アモルファスフルオロポリマーが一般式; 〔式中、m及びnは整数であり、n/(m+n)の比が
0.2〜1.0の範囲にある〕で表されるものである構
成、並びに炭素粉末の配合量がアモルファスフルオロポ
リマー100重量部に対して10〜100重量部の範囲
にある構成、をそれぞれ好適態様としている。Further, in the present invention, an amorphous fluoropolymer represented by the general formula: [Wherein, m and n are integers, and the ratio of n / (m + n) is in the range of 0.2 to 1.0], and the blending amount of carbon powder is amorphous fluoro. A preferred embodiment is a composition in the range of 10 to 100 parts by weight with respect to 100 parts by weight of the polymer.
【0009】一方、本発明の帯電防止処理方法は、同様
目的において、被処理物のフッ素系樹脂からなる表面に
上記の帯電防止用塗装剤を塗布したのち、加熱処理を施
すことを特徴とする構成を採用したものである。また、
本発明の帯電防止処理成形物は、同様目的において、フ
ッ素系樹脂成形物の少なくとも一部表面に請求項1〜3
のいずれかに記載の帯電防止用塗装剤が塗着されてなる
構成を採用したものである。On the other hand, for the same purpose, the antistatic treatment method of the present invention is characterized in that the above antistatic coating agent is applied to the surface of the article to be treated, which is made of a fluororesin, and then heat treatment is applied. The configuration is adopted. Also,
For the same purpose, the antistatically treated molded article of the present invention has at least a part of the surface of the fluororesin molded article.
The antistatic coating agent according to any one of 1 to 4 is adopted.
【0010】[0010]
【発明の細部構成と作用】本発明の帯電防止用塗装剤
は、アモルファスフルオロポリマーをフッ素系溶剤に溶
解した溶液中に炭素粉末が配合されたものであるため、
これを塗布して乾燥させることにより、上記フルオロポ
リマー中に炭素粉末が分散した導電性の被膜を形成す
る。従って、フッ素系樹脂からなる各種の成形物やライ
ニング等は、従来と同様にしてフッ素系樹脂のみを用い
て製作あるいは施工したのち、その帯電防止を要する表
面に当該塗装剤を塗布するだけで、形成される導電性被
膜による良好な帯電防止機能が付与されることになる。Detailed Structure and Function of the Invention Since the antistatic coating material of the present invention is a solution in which amorphous fluoropolymer is dissolved in a fluorine-based solvent, carbon powder is blended,
This is applied and dried to form a conductive coating in which carbon powder is dispersed in the fluoropolymer. Therefore, various molded articles and linings made of fluorocarbon resin are produced or constructed using only fluorocarbon resin in the same manner as in the past, and then the coating agent is applied to the surface requiring antistatic, A good antistatic function is imparted by the conductive coating formed.
【0011】しかして、この導電性被膜は、アモルファ
スフルオロポリマーが完全に溶解した溶液から溶剤揮散
により形成されるため、例えば不溶性のフッ素系樹脂粉
末と炭素粉末とを油剤中に分散含有させた懸濁液を用い
て形成される塗膜に比較して緻密で強度的に優れ、フッ
素系樹脂層としての充分な特性を保持する上、該ポリマ
ーによる炭素粉末の結着性が良好であり、高速の流体に
接触しても被膜層から脱落して流体中に混入する恐れは
なく、表面に触れても炭素粉末による汚れを生じず運搬
等の取扱い性がよく、しかも被膜内での炭素粉末の繋が
りがよいことから、薄い厚みで且つ炭素粉末の配合比率
が少ない状態でも非常に良好な導電性を示す。これに対
し、前記の耐薬品性チューブの内層のようにペースト押
出や溶融押出にて形成される炭素粉末含有層では、製造
時の混練等によって炭素粉末の繋がりが切れ易いため、
厚み及び炭素粉末の配合比率を大きく設定しても充分な
導電性が得られない。Since this conductive coating is formed by volatilizing the solvent from a solution in which the amorphous fluoropolymer is completely dissolved, for example, an insoluble fluorine resin powder and carbon powder are dispersed and contained in an oil agent. Compared to a coating film formed using a suspension, it is dense and excellent in strength, retains sufficient properties as a fluororesin layer, and has good binding properties of carbon powder by the polymer, and high speed. Even if it comes into contact with the fluid, there is no risk that it will fall out of the coating layer and mix into the fluid, and even if it comes into contact with the surface, it will not be contaminated by the carbon powder and it will be easy to carry and handle. Since they are well connected, they exhibit very good conductivity even when they are thin and the blending ratio of carbon powder is small. On the other hand, in the carbon powder-containing layer formed by paste extrusion or melt extrusion like the inner layer of the chemical resistant tube, since the connection of the carbon powder is easily broken by kneading during production,
Even if the thickness and the blending ratio of the carbon powder are set to be large, sufficient conductivity cannot be obtained.
【0012】このような帯電防止用塗装剤に用いるアモ
ルファスフルオロポリマーとしては、非晶性でフッ素系
溶剤に溶解して溶液となるものであれば特に制限なく使
用できるが、とりわけ好適なものとして次の一般式;As the amorphous fluoropolymer used in such an antistatic coating agent, any amorphous fluoropolymer which can be dissolved in a fluorine-based solvent to form a solution can be used without particular limitation. General formula of;
【0013】 〔式中、m及びnは整数であり、n/(m+n)の比が
0.2〜1.0の範囲にある〕で表されるものが挙げら
れる。[0013] [In the formula, m and n are integers, and the ratio of n / (m + n) is in the range of 0.2 to 1.0].
【0014】すなわち、上記一般式で表されるアモルフ
ァスフルオロポリマーは、特定のフッ素系溶剤に可溶で
あって、且つ各種溶剤に不溶性ではあるが非常に優れた
フッ素系樹脂として知られるポリテトラフルオロエチレ
ン樹脂やパーフルオロアルコキシエチレン樹脂等とほぼ
同等の性能を備える。なお、このようなアモルファスフ
ルオロポリマーの市販品としては、例えば米国E・I・
デュポン社製の商品名テフロンAF1600、同テフロ
ンAF2400等がある。That is, the amorphous fluoropolymer represented by the above general formula is polytetrafluoro, which is known as a fluorine-based resin which is soluble in a specific fluorine-based solvent and insoluble in various solvents but is very excellent. It has almost the same performance as ethylene resin and perfluoroalkoxy ethylene resin. Commercial products of such amorphous fluoropolymers include, for example, US E.I.
There are Teflon AF1600 and Teflon AF2400 manufactured by DuPont.
【0015】帯電防止用塗装剤に用いるフッ素系溶剤と
しては、使用するアモルファスフルオロポリマーを溶解
し得るものであればよい。しかして、前記一般式で表さ
れるアモルファスフルオロポリマー用のフッ素系溶剤と
しては、フッ素不活性液体が好適であり、その市販品に
は例えば米国スリーエム社製の商品名フロリナートFC
−75、同フロリナートFC−77、同フロリナートF
C−40等がある。The fluorine-based solvent used for the antistatic coating agent may be any solvent that can dissolve the amorphous fluoropolymer used. Therefore, as the fluorine-based solvent for the amorphous fluoropolymer represented by the above general formula, a fluorine-inert liquid is suitable, and a commercially available product thereof is, for example, a product name Fluorinert FC manufactured by 3M USA.
-75, Fluorinert FC-77, Fluorinert F
There is C-40 etc.
【0016】炭素粉末としては、合成樹脂に対する帯電
防止用配合剤として知られる各種のカーボンブラックを
いずれも使用可能であるが、特にケッチェンブラック等
の繊維質粉末からなるものが好適である。As the carbon powder, any of various carbon blacks known as antistatic compounding agents for synthetic resins can be used, but fibrous powder such as Ketjen black is particularly preferable.
【0017】アモルファスフルオロポリマーに対する炭
素粉末の配合量は、前者の100重量部に対して10〜
100重量部程度の範囲がよく、過少では充分な導電性
を付与できず、逆に過多ではポリマーによる炭素粉末の
結着性ならびに形成被膜の機械的特性の低下を招く。ま
た、塗装剤の固形分濃度は5〜10重量%程度とするの
がよい。The amount of carbon powder blended with the amorphous fluoropolymer is 10 to 100 parts by weight of the former.
A range of about 100 parts by weight is preferable, and if it is too small, sufficient conductivity cannot be imparted, and conversely, if it is too large, the binding property of the carbon powder by the polymer and the mechanical properties of the formed film are deteriorated. The solid content concentration of the coating material is preferably about 5 to 10% by weight.
【0018】本発明の塗装剤の塗布手段としては、浸漬
塗布、噴霧塗布、刷毛,ロール,ブレード等による塗り
付け、その他の種々の方法を採用でき、塗布対象とする
器材の形状や塗布部位に応じて適宜選択すればよい。そ
の塗布厚さは、乾燥塗膜厚として通常5〜10μm程度
の範囲である。As means for applying the coating agent of the present invention, various methods such as dip coating, spray coating, brush, roll, and blade coating, and other various methods can be adopted. It may be selected as appropriate. The coating thickness is usually in the range of about 5 to 10 μm as a dry coating film thickness.
【0019】上記塗装剤を用いて被処理物のフッ素系樹
脂からなる表面に帯電防止処理を施す場合、単に該塗装
剤を塗布して導電性被膜を形成するだけでもよいが、こ
の導電性被膜の形成後に加熱処理を施すことが望まし
い。すなわち、この加熱処理によって、導電性被膜と下
地のフッ素系樹脂とが強く一体化して実質的に連続層と
なるため、層間剥離等を防止できる。When an antistatic treatment is applied to the surface of a fluorine resin to be treated using the above coating agent, the coating agent may be simply applied to form a conductive coating. It is desirable to perform heat treatment after the formation of. That is, by this heat treatment, the conductive coating film and the underlying fluororesin are strongly integrated to form a substantially continuous layer, so that delamination or the like can be prevented.
【0020】ここで、上記の加熱処理温度としては、少
なくとも塗装剤に用いたアモルファスフルオロポリマー
のガラス転移点以上とするのがよい。また、その加熱手
段は、特に限定されないが、赤外線又は遠赤外線による
加熱が好適である。すなわち、この赤外線又は遠赤外線
加熱によれば、炭素粉末の含有により黒色を呈する導電
性被膜の熱吸収性が高いことから、下地のフッ素系樹脂
の融点が該被膜のアモルファスフルオロポリマーのガラ
ス転移点より高い場合及び低い場合共に、該被膜側が先
に溶融状態になり、次に該被膜に接している下地層が溶
融して該被膜と融着することになる。従って、下地層の
熱的悪影響や形状変化を殆ど生じないという利点があ
る。Here, the heat treatment temperature is preferably at least not lower than the glass transition point of the amorphous fluoropolymer used in the coating agent. The heating means is not particularly limited, but heating by infrared rays or far infrared rays is preferable. That is, according to this infrared or far-infrared heating, since the conductive coating that exhibits a black color due to the inclusion of carbon powder has high heat absorption, the melting point of the underlying fluororesin is the glass transition point of the amorphous fluoropolymer of the coating. In both cases of higher and lower cases, the coating side is in a molten state first, and then the underlayer in contact with the coating is melted and fused with the coating. Therefore, there is an advantage that the thermal adverse effect and the shape change of the underlayer hardly occur.
【0021】塗布対象は、フッ素系樹脂からなる各種成
形体のほか、ライニング等のフッ素系樹脂からなる被覆
層を有するもの等、帯電防止を必要とするものであれば
特に形状や構造等に制限はなく、既存の器材でもよい。
また、塗布の下地となるフッ素系樹脂にも特に制約はな
いが、加熱処理温度は下地層の融点以上になることが望
ましい。因に、アモルファスフルオロポリマーとして前
記一般式のものを用いた塗装剤を、パーフルオロアルコ
キシエチレン樹脂(融点300〜310℃)からなる成
形物の表面に塗布し、該樹脂の融点以上に加熱処理した
ところ、塗膜層が下地の成形物表面に強固に融着され、
優れた帯電防止効果を発揮する成形物が得られた。The object to be coated is not limited to various shapes made of fluorocarbon resin, but also those having a coating layer made of fluorocarbon resin such as a lining, etc., as long as it requires antistatic properties, and the shape and structure are particularly limited. Alternatively, existing equipment may be used.
Further, although there is no particular limitation on the fluorine-based resin as a base for coating, it is desirable that the heat treatment temperature be higher than the melting point of the base layer. Incidentally, a coating agent using the above-mentioned general formula as an amorphous fluoropolymer was applied to the surface of a molded article made of perfluoroalkoxyethylene resin (melting point 300 to 310 ° C.), and heat-treated at a temperature not lower than the melting point of the resin. However, the coating layer is firmly fused to the surface of the underlying molded article,
A molded product having an excellent antistatic effect was obtained.
【0022】[0022]
実施例1 アモルファスフルオロポリマー(米国E・I・デュポン
社製の商品名テフロンAF1600)2gをフッ素系溶
剤(米国スリーエム社製の商品名フロリナートFC−7
5)30cc中に溶解した溶液中に、ケッチェンブラッ
ク1gを混合分散して帯電防止用塗装剤を調製した。そ
して、パーフルオロアルコキシエチレン樹脂製の耐薬品
性チューブ(直径22mm、厚さ1.5mm)の表面
に、上記塗装剤を刷毛塗りにより塗布し、室温下で乾燥
して厚さ約5μmの導電性被膜を形成し、次いで赤外線
加熱装置により該被膜表面での温度が320℃となるよ
うに設定して3分間の加熱処理を施した。処理後のチュ
ーブの1cm長さ間の電気抵抗を測定したところ、3〜
50KΩであった。Example 1 2 g of an amorphous fluoropolymer (Teflon AF1600, trade name, manufactured by E.I.DuPont, USA) was added to a fluorine-based solvent (Fluorinert FC-7, trade name, manufactured by 3M, USA).
5) 1 g of Ketjen Black was mixed and dispersed in a solution dissolved in 30 cc to prepare an antistatic coating agent. Then, the above coating agent is applied by brush coating on the surface of a perfluoroalkoxyethylene resin chemically resistant tube (diameter 22 mm, thickness 1.5 mm), and dried at room temperature to give a conductive layer having a thickness of about 5 μm. A coating film was formed, and then heat treatment was performed for 3 minutes by setting the temperature on the surface of the coating film to 320 ° C. by an infrared heating device. When the electric resistance of the treated tube for 1 cm was measured, it was 3 to
It was 50 KΩ.
【0023】実施例2 ケッチェンブラックの使用量を0.7gに変更した以外
は、実施例1と同様にして帯電防止用塗装剤を調製し
た。そして、実施例1と同様にして、上記塗装剤を耐薬
品性チューブの表面に塗布、乾燥して厚さ約3μmの導
電性被膜を形成し、次いで実施例1と同様にして、赤外
線加熱装置による加熱処理を施したところ、処理後のチ
ューブの実施例1と同条件での電気抵抗は3〜100K
Ωであった。Example 2 An antistatic coating agent was prepared in the same manner as in Example 1 except that the amount of Ketjen black used was changed to 0.7 g. Then, in the same manner as in Example 1, the above coating agent was applied to the surface of the chemical resistant tube and dried to form a conductive coating film having a thickness of about 3 μm. Then, in the same manner as in Example 1, an infrared heating device was used. The heat resistance of the tube after the heat treatment was 3 to 100K under the same conditions as in Example 1.
It was Ω.
【0024】実施例3 アモルファスフルオロポリマーとして米国E・I・デュ
ポン社製の商品名テフロンAF2400を同量使用した
以外は、実施例1と同様にして帯電防止用塗装剤を調製
した。そして、実施例1と同様にして、上記塗装剤を耐
薬品性チューブの表面に塗布、乾燥して厚さ約5μmの
導電性被膜を形成し、次いで実施例1と同様にして、赤
外線加熱装置による加熱処理を施したところ、処理後の
チューブの実施例1と同条件での電気抵抗は10〜70
KΩであった。Example 3 An antistatic coating agent was prepared in the same manner as in Example 1 except that the same amount of Teflon AF2400 (trade name, manufactured by EI DuPont, USA) was used as the amorphous fluoropolymer. Then, in the same manner as in Example 1, the above coating agent was applied to the surface of the chemical resistant tube and dried to form a conductive coating film having a thickness of about 5 μm. Then, in the same manner as in Example 1, an infrared heating device was used. When subjected to a heat treatment with, the electric resistance of the treated tube under the same conditions as in Example 1 was 10 to 70.
It was KΩ.
【0025】実施例4 厚さ約0.5mmのガラス繊維クロスを介してパーフル
オロアルコキシエチレン樹脂からなるライニング(樹脂
層厚3mm)を施した鉄製円筒形タンク(内径20c
m、高さ30cm)の内面に、実施例1と同様にして調
製した帯電防止用塗装剤を刷毛塗りにより塗布し、室温
下で乾燥して厚さ約5μmの導電性被膜を形成し、次い
で高温熱風装置(約600℃)により該被膜表面を移動
させつつ加熱処理を施した。処理後のタンク内面の1c
m長さ間の電気抵抗を測定したところ、100〜500
KΩであった。Example 4 An iron cylindrical tank (inner diameter 20c) having a lining made of perfluoroalkoxyethylene resin (resin layer thickness 3 mm) through a glass fiber cloth having a thickness of about 0.5 mm.
m, height 30 cm), an antistatic coating agent prepared in the same manner as in Example 1 was applied by brush coating, and dried at room temperature to form a conductive coating having a thickness of about 5 μm. Heat treatment was performed while moving the surface of the coating film by a high temperature hot air device (about 600 ° C.). 1c of the inner surface of the tank after processing
When the electric resistance between m lengths was measured, it was 100 to 500.
It was KΩ.
【0026】実施例5 実施例1と同様の組成比に調製した帯電防止用塗装剤中
に、表面全体に厚さ約3mmのパーフルオロアルコキシ
エチレン樹脂からなるライニングを施したステンレス鋼
製のパドル型攪拌羽根(実験用小型反応槽に装備するも
ので、幅3cm、長さ10cmの2枚羽根)を浸漬し乾
燥する操作を3回反復したところ、表面全体に均一に厚
さ約10μmの導電性被膜が形成された。次いで赤外線
加熱炉内に該攪拌羽根を装填し、340にて10分間の
加熱処理を施した。処理後の攪拌羽根表面の1cm長さ
間の電気抵抗を測定したところ、20〜30KΩであっ
た。Example 5 A paddle type made of stainless steel in which an antistatic coating agent prepared in the same composition ratio as in Example 1 was lined with a perfluoroalkoxyethylene resin having a thickness of about 3 mm on the entire surface. When the stirring blade (equipped in a small reaction tank for experiments, two blades with a width of 3 cm and a length of 10 cm) was dipped and dried three times, the surface was uniformly conductive with a thickness of about 10 μm. A film was formed. Next, the stirring blade was loaded in an infrared heating furnace, and heat treatment was performed at 340 for 10 minutes. When the electrical resistance of the surface of the stirring blade after the treatment for 1 cm was measured, it was 20 to 30 KΩ.
【0027】〔帯電性比較試験〕直径22mm、厚さ
1.5mmのパーフルオロアルコキシエチレン樹脂製の
耐薬品性チューブを軸線方向に沿って3分割したもの
(長さ10cm)を用い、その内面側に実施例1と同様
の帯電防止用塗装剤を刷毛塗りして室温乾燥したのち実
施例1と同条件で加熱処理する方法において、該塗装剤
の塗布回数を変えることにより導電性被膜の厚みが異な
る複数の試験片(表1記載)を作製した。[Chargeability Comparison Test] A chemical resistant tube made of perfluoroalkoxyethylene resin having a diameter of 22 mm and a thickness of 1.5 mm, which was divided into three along the axial direction (10 cm in length), was used on the inner surface side. In the method in which the same antistatic coating material as in Example 1 is applied with a brush, dried at room temperature, and then heat-treated under the same conditions as in Example 1, the thickness of the conductive coating is changed by changing the number of times the coating material is applied. Different test pieces (described in Table 1) were prepared.
【0028】次に、未処理試験片Aと帯電防止処理を施
した試験片C1〜C4、ならびに2層管状押出成形にて
作製された炭素粉末を含む内層を有するパーフルオロア
ルコキシエチレン樹脂製の2層チューブ(径及び肉厚は
上記耐薬品性チューブと同じ、内層は厚さ0.1mmで
ケッチェンブラック10重量%含有)を上記同様に分割
した試験片Bについて、それぞれ内面側を絹布で10回
摩擦したのち、その内面側の帯電量を帯電測定器(Io
n System Inc.製のModel−75)に
て測定したところ、下記表1に示す結果が得られた。な
お、各試験片は、外面側の帯電による測定値への影響を
避けるためにアルミ箔で外面側を覆った状態とし、帯電
測定器の検知部に対して2.5cmの間隔をおいて内面
側を対向させた形で試験した。Next, an untreated test piece A, antistatic test pieces C1 to C4, and 2 made of perfluoroalkoxyethylene resin having an inner layer containing carbon powder produced by two-layer tubular extrusion molding were used. A test piece B obtained by dividing a layer tube (having the same diameter and wall thickness as the above-mentioned chemical resistant tube, the inner layer having a thickness of 0.1 mm and containing 10% by weight of Ketjenblack) in the same manner as above was made of silk cloth on the inner surface side. After rubbing twice, the amount of charge on the inner surface of
n System Inc. The results shown in Table 1 below were obtained by measurement with a Model-75 manufactured by Mfg. Co., Ltd. The outer surface of each test piece was covered with aluminum foil in order to avoid the influence of the outer surface charge on the measured value. The test was done with the sides facing each other.
【0029】[0029]
【表1】 [Table 1]
【0030】上表より、本発明の帯電防止用塗装剤によ
れば、3回程度の塗布回数で充分な帯電防止効果が得ら
れることが判る。なお、その帯電量は2層チューブより
大きいが、塗膜厚は2層チューブの内層に比べて格段に
薄いことを考慮すれば、効率が高く、また帯電防止手段
としての容易さから遙かに実用性が高いと言える。From the above table, it can be seen that the antistatic coating agent of the present invention can achieve a sufficient antistatic effect with about three application times. It should be noted that the charge amount is larger than that of the two-layer tube, but considering that the coating film thickness is much thinner than that of the inner layer of the two-layer tube, the efficiency is high, and it is much easier as an antistatic means. It can be said that it is highly practical.
【0031】[0031]
【発明の効果】本発明の帯電防止用塗装剤によれば、フ
ッ素系樹脂からなる各種の成形物やライニング等の帯電
防止を要する表面に塗布するだけで強靱な導電性被膜が
形成されるから、フッ素系樹脂を用いた器材や装置等の
形状・構造に関係なく、また該フッ素系樹脂の特性・性
能を損なうことなく、簡単に且つ安価に優れた帯電防止
機能を付与でき、しかもフッ素系樹脂を使用した既存の
各種器材・装置に対しても二次的に帯電防止を施すこと
が可能となる。しかして、この導電性被膜は、薄い膜厚
で且つ炭素粉末の配合比率が低い状態でも高い導電性を
示し、それだけ帯電防止に要する炭素粉末の使用量を少
なくでき、また被膜形成成分がアモルファスフルオロポ
リマーであるため、フッ素系樹脂特有の優れた被膜特性
を具備すると共に下地のフッ素系樹脂との親和性がよ
く、加えて炭素粉末の結着力が高く該粉末の脱落による
接触流体中への混入や取扱い時の汚れを生じる恐れがな
い。EFFECTS OF THE INVENTION According to the antistatic coating agent of the present invention, a tough conductive coating film can be formed only by applying it to various antistatic surfaces such as various moldings and linings made of fluororesin. , An excellent antistatic function can be easily and inexpensively provided regardless of the shape and structure of equipment and devices using fluorocarbon resin, and without impairing the characteristics and performance of the fluorocarbon resin. It also becomes possible to secondarily prevent static electricity from existing equipment and devices that use resin. However, this conductive coating shows high conductivity even in a state where the film thickness is thin and the mixing ratio of carbon powder is low, the amount of carbon powder required for antistatic can be reduced accordingly, and the film forming component is amorphous fluorocarbon. Since it is a polymer, it has excellent film characteristics peculiar to fluorocarbon resin, has good affinity with the fluorocarbon resin of the base, and also has high binding strength of carbon powder and is mixed into the contact fluid due to falling of the powder. There is no risk of contamination during handling or handling.
【0032】またアモルファスフルオロポリマーとして
特定の構造を有するものを使用する請求項2の構成、な
らびにアモルファスフルオロポリマーに対する炭素粉末
の配合量を特定範囲とする請求項2の構成によれば、上
記の帯電防止機能をより効率よく発揮できると共に、特
に優れた被膜特性を有する導電性被膜が形成されるとい
う利点がある。According to the structure of claim 2 in which an amorphous fluoropolymer having a specific structure is used, and in the structure of claim 2 in which the amount of carbon powder to be mixed with the amorphous fluoropolymer is within a specific range, the above-mentioned charging There is an advantage that the prevention function can be exhibited more efficiently, and a conductive film having particularly excellent film characteristics is formed.
【0033】一方、本発明の帯電防止処理方法によれ
ば、上記の導電性被膜を確実に形成できる上、該被膜と
下地のフッ素系樹脂とが強く一体化して層間剥離を生じ
ないものとなる。On the other hand, according to the antistatic treatment method of the present invention, the above-mentioned conductive film can be reliably formed, and at the same time, the film and the underlying fluororesin are strongly integrated so that delamination does not occur. ..
【0034】更に、本発明の帯電防止処理成形物は、フ
ッ素系樹脂成形物の少なくとも一部表面に上記帯電防止
用塗装剤が塗着されているため、全体としてフッ素系樹
脂の優れた物理的及び化学的特性を保持して且つ良好な
帯電防止性能を備える。Further, since the antistatic-treated molded article of the present invention has the above-mentioned antistatic coating agent applied on at least a part of the surface of the fluororesin molded article, it is excellent in the physical properties of the fluororesin as a whole. And retains chemical properties and has good antistatic performance.
Claims (5)
系溶剤に溶解した溶液中に炭素粉末が配合されてなる帯
電防止用塗装剤。1. An antistatic coating agent comprising carbon powder mixed in a solution obtained by dissolving an amorphous fluoropolymer in a fluorine-based solvent.
式; 〔式中、m及びnは整数であり、n/(m+n)の比が
0.2〜1.0の範囲にある〕で表されるものである請
求項1記載の帯電防止用塗装剤。2. An amorphous fluoropolymer having the general formula; The antistatic coating agent according to claim 1, wherein m and n are integers and the ratio of n / (m + n) is in the range of 0.2 to 1.0.
ロポリマー100重量部に対して10〜100重量部の
範囲にある請求項1又は2に記載の帯電防止用塗装剤。3. The antistatic coating agent according to claim 1, wherein the compounding amount of the carbon powder is in the range of 10 to 100 parts by weight with respect to 100 parts by weight of the amorphous fluoropolymer.
請求項1〜3のいずれかに記載の帯電防止用塗装剤を塗
布したのち、加熱処理を施すことを特徴とする帯電防止
処理方法。4. An antistatic treatment method, which comprises applying the antistatic coating agent according to any one of claims 1 to 3 to a surface of an object to be treated made of a fluororesin, and then performing heat treatment. ..
面に請求項1〜3のいずれかに記載の帯電防止用塗装剤
が塗着されてなる帯電防止処理成形物。5. An antistatic-treated molded article obtained by applying the antistatic coating agent according to claim 1 on at least a part of the surface of a fluororesin molded article.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3280540A JP2758091B2 (en) | 1991-09-30 | 1991-09-30 | Antistatic treatment method for fluororesin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3280540A JP2758091B2 (en) | 1991-09-30 | 1991-09-30 | Antistatic treatment method for fluororesin |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0593184A true JPH0593184A (en) | 1993-04-16 |
JP2758091B2 JP2758091B2 (en) | 1998-05-25 |
Family
ID=17626499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3280540A Expired - Lifetime JP2758091B2 (en) | 1991-09-30 | 1991-09-30 | Antistatic treatment method for fluororesin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2758091B2 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5843425A (en) * | 1981-09-09 | 1983-03-14 | Nippon Kogaku Kk <Nikon> | Spectacle frame made of metal |
JPS62199663A (en) * | 1986-02-26 | 1987-09-03 | Daikin Ind Ltd | Electrically conductive coating material composition |
JPS6438827A (en) * | 1987-08-05 | 1989-02-09 | Fujitsu Ltd | First-in first-out buffer control system |
JPH0218690A (en) * | 1988-07-07 | 1990-01-22 | Matsushita Electric Ind Co Ltd | Ic card reader |
-
1991
- 1991-09-30 JP JP3280540A patent/JP2758091B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5843425A (en) * | 1981-09-09 | 1983-03-14 | Nippon Kogaku Kk <Nikon> | Spectacle frame made of metal |
JPS62199663A (en) * | 1986-02-26 | 1987-09-03 | Daikin Ind Ltd | Electrically conductive coating material composition |
JPS6438827A (en) * | 1987-08-05 | 1989-02-09 | Fujitsu Ltd | First-in first-out buffer control system |
JPH0218690A (en) * | 1988-07-07 | 1990-01-22 | Matsushita Electric Ind Co Ltd | Ic card reader |
Also Published As
Publication number | Publication date |
---|---|
JP2758091B2 (en) | 1998-05-25 |
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