JP2577416B2 - Non-stick lubricating coating - Google Patents
Non-stick lubricating coatingInfo
- Publication number
- JP2577416B2 JP2577416B2 JP33324187A JP33324187A JP2577416B2 JP 2577416 B2 JP2577416 B2 JP 2577416B2 JP 33324187 A JP33324187 A JP 33324187A JP 33324187 A JP33324187 A JP 33324187A JP 2577416 B2 JP2577416 B2 JP 2577416B2
- Authority
- JP
- Japan
- Prior art keywords
- fluorine
- film
- coating
- test
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、非粘着性潤滑被膜に関するものである。The present invention relates to a non-adhesive lubricating coating.
従来、非粘着性潤滑被膜としてフッ素樹脂を用いるこ
とが広く知られている。そして、その被膜の形式方法と
して、フッ素樹脂を流動浸漬法等により溶融コーティン
グすることが行なわれているが、多くの場合、基材への
密着強度が充分でないため、あらかじめ基材表面にプラ
イマー層（中塗り層）を設けておく必要があった。ま
た、被膜の厚みを精度よく調整するのが難しく、基材の
温度をフッ素樹脂の溶融温度（約300℃）以上に上げね
ばならず、基材に硬度変化や寸法変化等が生じる等障害
が多かった。Conventionally, it is widely known to use a fluororesin as a non-adhesive lubricating coating. As a method of forming the film, a fluorine resin is melt-coated by a fluid immersion method or the like. However, in many cases, the adhesion strength to the substrate is not sufficient, so that a primer layer is previously formed on the surface of the substrate. (Intermediate coating layer). In addition, it is difficult to accurately adjust the thickness of the coating, and the temperature of the base material must be raised to a temperature higher than the melting temperature of the fluororesin (about 300 ° C.). There were many.
一方、プライマーを必要としないで、比較的低温で焼
成される含フッ素樹脂塗料もあり、これは塗装後のバイ
ンダー樹脂の硬化にともなって被膜を形成するものであ
る。このような塗料は、一般に、ポリイミド樹脂、ポリ
アミドイミド樹脂、エポキシ樹脂など基材に対する密着
性に優れたバインダー用の樹脂をＮ−メチルピロリドン
等の有機溶剤に分散させた溶液と四フッ化エチレン樹
脂、四フッ化エチレン六フッ化プロピレン樹脂、パーフ
ルオロアルコキシ樹脂等の潤滑性および非粘着性に富む
含フッ素樹脂を混合させたものである。この塗料の特徴
はバインダー樹脂とフッ素樹脂の凝集エネルギーの差を
利用して、被膜の基材側（接着側）にはバインダー樹脂
に富んだ層を形成し、基材との充分な密着強度を得、表
面にはフッ素樹脂に富んだ層を形成し、非粘着性および
潤滑性を得ようとするものである。また、この塗料の焼
成温度はバインダー樹脂の溶融、硬化温度によって決ま
り、室温で硬化できるものもある。しかし、これら塗料
の非粘着性を考慮すると、フッ素樹脂はほとんど溶融し
ておらず表面での分子のつながりはなく、表面層には若
干のバインダー層もあり、このバインダー層が有する親
和性が被膜表面の非粘着性を低下させるという問題点が
あった。また、潤滑に関しては、一般にフッ素樹脂が低
摩擦特性を有する材料とされるが、その摺動機構は、あ
る程度の摺動（エージング）により表面のフッ素樹脂が
相手材表面に転移して、その結果フッ素樹脂とフッ素樹
脂との摺動となり、それ以後安定した低摩擦特性を示す
と考えられているが、転移膜が形成されるまで、摩擦係
数が安定しない（特に摺動開始時の特性を左右する静摩
擦係数に大きい影響を与える）という欠点があった。こ
のことは従来の含フッ素樹脂被膜についても同様であ
る。On the other hand, there is a fluorine-containing resin paint which does not require a primer and is baked at a relatively low temperature, and this forms a film with the curing of the binder resin after the coating. Such coatings are generally prepared by dispersing a resin for a binder having excellent adhesion to a substrate such as a polyimide resin, a polyamideimide resin, and an epoxy resin in an organic solvent such as N-methylpyrrolidone and an ethylene tetrafluoride resin. And a fluorine-containing resin having high lubricity and non-adhesiveness, such as tetrafluoroethylene hexafluoropropylene resin and perfluoroalkoxy resin. The characteristic of this paint is to form a layer rich in binder resin on the substrate side (adhesion side) of the coating film by utilizing the difference in cohesive energy between the binder resin and the fluororesin, and to achieve sufficient adhesion strength with the substrate. On the surface, a layer rich in fluororesin is formed to obtain non-adhesiveness and lubricity. The baking temperature of the paint is determined by the melting and curing temperatures of the binder resin, and some of them can be cured at room temperature. However, considering the non-adhesiveness of these paints, the fluororesin is hardly melted, there is no connection of molecules on the surface, there is also a slight binder layer on the surface layer, and the affinity of this binder layer is There was a problem that the non-stickiness of the surface was reduced. Regarding lubrication, generally, fluororesin is a material having low friction characteristics, but the sliding mechanism is such that the fluororesin on the surface is transferred to the mating material surface by a certain degree of sliding (aging), and as a result, It is believed that the sliding between the fluororesin and the fluororesin results in a stable low friction characteristic. However, the coefficient of friction is not stable until the transition film is formed. Greatly affecting the coefficient of static friction). This is the same for the conventional fluorine-containing resin coating.
さらに、最近は寸法精度に対する要求が厳しく、被膜
形成後に被膜の切削等の仕上げ加工が必要となってきた
が、切削加工される層は凝集エネルギーにより表面に形
成された層であるため、当然のことながら加工後の表面
の非粘着性および摺動特性は本来のものよりは遥かに劣
るのである。Furthermore, recently, the demands on dimensional accuracy are severe, and it is necessary to finish the film such as cutting the film after forming the film. However, since the layer to be cut is a layer formed on the surface by cohesive energy, However, the non-adhesiveness and sliding properties of the processed surface are far inferior to the original.
以上述べたように、従来の技術においては、含フッ素
樹脂被膜で優れた非粘着性および安定性のある摺動特性
を有するものが得られていないこと、および高精度の要
求に対して、仕上げ加工を行なったときに、被膜本来の
非粘着性、潤滑性を失うという問題点があった。As described above, in the prior art, it has not been possible to obtain a fluorine-containing resin film having excellent non-adhesive and stable sliding properties, and to meet the demand for high precision, When processing is performed, there is a problem that the original non-adhesiveness and lubricity of the coating film are lost.
上記の問題点を解決するために、この発明は含フッ素
樹脂被膜の上にフッ素短鎖重合体からなる薄膜を形成す
るという手段を採用したものである。以下にその詳細を
述べる。In order to solve the above-mentioned problems, the present invention employs means for forming a thin film made of a short fluorine-chain polymer on a fluorine-containing resin film. The details are described below.
一般に、ポリ四フッ化エチレン樹脂（以下PTFEと略記
する）は分子量が10万〜100万であり、分子の性質上、
分散可能な溶剤はなく、塗液として前述のバインダー樹
脂の分散液等に混合されている。また融点が約330℃と
高く、溶融粘度も大きい。Generally, polytetrafluoroethylene resin (hereinafter abbreviated as PTFE) has a molecular weight of 100,000 to 1,000,000,
There is no dispersible solvent, and it is mixed as a coating liquid with the aforementioned binder resin dispersion or the like. The melting point is as high as about 330 ° C and the melt viscosity is high.
これに対してこの発明のフッ素短鎖重合体とは四フッ
化エチレン鎖 CF2−CF2 を主骨格とし分子量が１万以下のものであり、ハロゲン
化炭化水素類の溶剤に分散可能であるため、フッ素短鎖
重合体だけの塗液を得ることができる。そして、重合度
が低いので、融点が約250℃程度であり、被膜は溶着さ
れたものとなる。この時の膜厚は分子の径および溶融状
態によって決定されるが、フッ素短鎖重合体ならば３μ
ｍ以下の厚さにすることは充分可能であり、通常の場合
１μｍ以下にするのが好ましい。特に寸法精度が要求さ
れる場合には、含フッ素樹脂被膜を基材面に形成した
後、切削等の仕上げ加工をし、それをフレオンで希釈し
たフッ素短鎖重合体の塗液へ浸漬し、引き上げた後焼成
するなどの操作を行なえば、所望する寸法を保持したま
まその表面に薄膜を形成することができる。In contrast, the fluorine short-chain polymer of the present invention has an ethylene tetrafluoride chain CF 2 —CF 2 as a main skeleton and a molecular weight of 10,000 or less, and can be dispersed in a solvent of a halogenated hydrocarbon. Therefore, it is possible to obtain a coating liquid containing only the fluorine short-chain polymer. And, since the degree of polymerization is low, the melting point is about 250 ° C., and the coating is welded. At this time, the film thickness is determined by the molecular diameter and the molten state.
It is sufficiently possible to make the thickness less than m, and usually less than 1 μm is preferable. In particular, when dimensional accuracy is required, after forming a fluorine-containing resin film on the base material surface, performing finishing such as cutting, immersing it in a coating liquid of a fluorine short chain polymer diluted with Freon, If an operation such as baking after lifting is performed, a thin film can be formed on the surface while maintaining the desired dimensions.
実施例1: ステンレス鋼（SUS 420J）からなる円盤（外径30mm、
内径6mm、厚5mm、表面粗さRmax1μｍ）をトリクレンの
蒸気で洗浄し、その片面に、含フッ素樹脂塗料（ダイキ
ン工業社製:TC−7109BK）をスプレーコーティングし、1
00℃で30分間乾燥した後、230℃で30分間焼成し、含フ
ッ素樹脂被膜を形成させた。さらに、その円盤をフッ素
短鎖重合体（デュポン社製：バイダックスAR）がフレオ
ンR113（三井フロロケミカル社製：フレオンTF）中に５
重量％になるように分散している塗液の中へ浸漬した
後、80mm/分の速度で引き上げた。これを100℃で１時間
乾燥し、さらに280℃で１時間焼成して、含フッ素樹脂
被膜の上にフッ素短鎖重合体薄膜が形成された試験片を
得た。得られた試験片についてつぎの２種類の試験（摩
擦試験および非粘着性試験）を行ない、その結果を表に
まとめた。Example 1: A disk (outer diameter 30 mm, stainless steel (SUS420J))
Inner diameter 6mm, thickness 5mm, surface roughness Rmax1μm) was washed with trichlene vapor, and one surface was spray-coated with fluororesin paint (TC-7109BK, manufactured by Daikin Industries, Ltd.).
After drying at 00 ° C. for 30 minutes, it was baked at 230 ° C. for 30 minutes to form a fluorine-containing resin film. Further, the disk was placed in a Freon R113 (Freon TF, manufactured by Mitsui Fluorochemicals, Inc.) in a short fluorocarbon polymer (Vidax AR, manufactured by DuPont).
After being immersed in the coating liquid dispersed so as to be in a weight%, it was pulled up at a speed of 80 mm / min. This was dried at 100 ° C. for 1 hour, and further baked at 280 ° C. for 1 hour to obtain a test piece having a fluorine-containing short-chain polymer thin film formed on a fluorine-containing resin film. The following two types of tests (friction test and non-adhesion test) were performed on the obtained test pieces, and the results were summarized in a table.
摩擦試験： 洋ベア・ルーロン工場社製スラスト摩擦試験機にて面
圧1kgf/cm2、速度10m/分、相手材アルミニウム（AL505
6）として100時間の摩擦試験を行なった。そして、運転
開始時および100時間運転後の静摩擦係数ならびに20時
間ごとの動摩擦係数および運転終了後の静摩擦係数を求
めた。Friction test: Surface tension 1kgf / cm 2 , speed 10m / min, aluminum mating material (AL505
A friction test for 100 hours was performed as 6). Then, the static friction coefficient at the start of the operation and after the operation for 100 hours, the dynamic friction coefficient every 20 hours, and the static friction coefficient after the operation was completed were determined.
非粘着性試験： 水を試験液とし、ゴニオメーターを用いて試験片被膜
の滴下１分後の接触角を求めた。Non-adhesion test: Using water as a test liquid, the contact angle of the test piece coating 1 minute after dripping was measured using a goniometer.
実施例2: 実施例１において含フッ素樹脂被膜を形成後切削加工
を行ない、その上にフッ素短鎖重合体からなる薄膜を形
成したものを試験片とした。実施例１と全く同様の試験
を行ない、得られた結果を表に併記した。Example 2: After forming the fluorine-containing resin film in Example 1, cutting was performed, and a thin film made of a fluorine short-chain polymer was formed thereon to obtain a test piece. The same test as in Example 1 was performed, and the obtained results are also shown in the table.
比較例１および2: 実施例１と同様の方法にて、ステンレス鋼円盤（SUS
420 J2）に含フッ素樹脂被膜を形成させたものを試験片
とし、これを比較例１とした。さらに、比較例１の被膜
を切削加工したものを試験片とし、これを比較例２とし
た。これら二つの試験片に対し実施例１と全く同様の試
験を行ない、得られた結果を表に併記した。Comparative Examples 1 and 2: In the same manner as in Example 1, a stainless steel disc (SUS
420 J2) on which a fluororesin coating was formed was used as a test piece, which was used as Comparative Example 1. Further, a cut piece of the coating of Comparative Example 1 was used as a test piece, which was used as Comparative Example 2. The same test as in Example 1 was performed on these two test pieces, and the obtained results are also shown in the table.
比較例3: ステンレス鋼円盤に含フッ素樹脂塗料を予め用いるこ
となく、実施例１と全く同様の方法にてフッ素短鎖重合
体からなる薄膜を形成させ、これを試験片とした。この
試験片に対し実施例１と全く同様の試験を行ない、得ら
れた結果を表に併記した。Comparative Example 3: A thin film made of a fluorine short-chain polymer was formed in exactly the same manner as in Example 1 without previously using a fluorine-containing resin paint on a stainless steel disk, and this was used as a test piece. The same test as in Example 1 was performed on this test piece, and the obtained results are also shown in the table.
表から明らかなように、実施例１および２は、安定し
て低い動摩擦係数を示し、静摩擦係数も運転開始時から
低かった。また、水に対する接触角は105〜110゜または
107〜110゜であった。これに対して、含フッ素樹脂被膜
のみを形成してある試験片（比較例１および２）は、運
転開始から数分間は動摩擦係数が高く、それ以降は低い
値で安定した。静摩擦係数も運転開始時は高かったが、
試験終了後は低い値になっていた。また水に対する接触
角は実施例に比較して小さい値であった。As is clear from the table, Examples 1 and 2 exhibited a low coefficient of dynamic friction stably, and the coefficient of static friction was also low from the start of operation. Also, the contact angle with water is 105-110 ゜ or
It was 107-110 ゜. On the other hand, the test pieces (Comparative Examples 1 and 2) on which only the fluorine-containing resin film was formed had a high dynamic friction coefficient for several minutes from the start of operation, and were stable at a low value thereafter. The coefficient of static friction was also high at the start of operation,
After the test, the value was low. Further, the contact angle with water was a small value as compared with the example.
フッ素短鎖重合体からなる薄膜だけを形成した比較例
３は、運転開始時の静・動いずれの摩擦係数も低かった
が、次第に大きくなる傾向を示した。 Comparative Example 3, in which only a thin film made of a fluorine short-chain polymer was formed, had a low static and dynamic coefficient of friction at the start of operation, but showed a tendency to gradually increase.
以上のことから、フッ素短鎖重合体を単独で使用した
場合充分な密着強度が得られず、耐久性に欠ける。しか
し、含フッ素樹脂被膜の上に薄膜として形成すると、耐
久性が向上し、運転開始前に相手材摺動面に転移膜が予
めある場合と同様の低い静摩擦係数を示し、動摩擦係数
も低い値で安定させることができた。また含フッ素樹脂
被膜だけの場合より非粘着性も向上させることができ
た。このように、優れた非粘着性および摺動特性を要求
される被膜には含フッ素樹被膜の上にフッ素短鎖重合体
からなる薄膜を形成させたものが最も好ましい。また、
寸法精度の厳しいものに対しても、同様に仕上げ加工さ
れた含フッ素樹脂被膜に対して、その寸法精度を保持し
たまま、フッ素短鎖重合体薄膜にて優れた非粘着性およ
び摺動特性を付与することができた。As described above, when the fluorine short-chain polymer is used alone, sufficient adhesion strength cannot be obtained and the durability is poor. However, when formed as a thin film on a fluorine-containing resin film, the durability is improved, a low coefficient of static friction similar to the case where a transfer film is previously provided on the sliding surface of the mating material before the start of operation, and a low dynamic friction coefficient. Could be stabilized. Further, the non-adhesiveness could be improved as compared with the case of only the fluorine-containing resin coating. As described above, it is most preferable that a film which is required to have excellent non-adhesiveness and sliding properties is formed by forming a thin film composed of a fluorine short-chain polymer on a fluorine-containing resin film. Also,
Even for those with strict dimensional accuracy, the fluororesin coating film that has been finished in the same way, while maintaining its dimensional accuracy, has excellent non-adhesiveness and sliding characteristics with a fluorine short-chain polymer thin film. Could be granted.
以上述べたように、この発明の非粘着性潤滑被膜は寸
法精度の厳しい場合においても安定性のある優れた非粘
着性および摺動特性を発揮し得るものであるから、この
発明の非粘着性潤滑被膜は複写機またはレーザービーム
プリンター等の分離爪、光学式ピックアップの支持軸、
自動車用ステアリング用サポート軸受、撹拌槽中の撹拌
翼またはじゃま板等々にきわめて有効に利用することが
できる。As described above, since the non-adhesive lubricating coating of the present invention can exhibit excellent stable non-adhesive and sliding properties even when dimensional accuracy is severe, the non-adhesive lubricating film of the present invention The lubricating film is a separation claw of a copier or a laser beam printer, a support shaft of an optical pickup,
It can be very effectively used for a support bearing for an automobile steering, a stirring blade or a baffle plate in a stirring tank, and the like.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｎ 40:00 40:02 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location C10N 40:00 40:02
Claims (1)
からなる薄膜を形成させたことを特徴とする非粘着性潤
滑被膜。1. A non-adhesive lubricating film, wherein a thin film made of a fluorine short-chain polymer is formed on a fluorine-containing resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33324187A JP2577416B2 (en) | 1987-12-24 | 1987-12-24 | Non-stick lubricating coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33324187A JP2577416B2 (en) | 1987-12-24 | 1987-12-24 | Non-stick lubricating coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01169200A JPH01169200A (en) | 1989-07-04 |
| JP2577416B2 true JP2577416B2 (en) | 1997-01-29 |
Family
ID=18263904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33324187A Expired - Fee Related JP2577416B2 (en) | 1987-12-24 | 1987-12-24 | Non-stick lubricating coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2577416B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411109A1 (en) | 2002-10-17 | 2004-04-21 | Juki Corporation | Solid lubricant on the basis of RBC powder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3614324B2 (en) * | 1999-08-31 | 2005-01-26 | シャープ株式会社 | Image interpolation system and image interpolation method |
-
1987
- 1987-12-24 JP JP33324187A patent/JP2577416B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411109A1 (en) | 2002-10-17 | 2004-04-21 | Juki Corporation | Solid lubricant on the basis of RBC powder |
| US7258926B2 (en) | 2002-10-17 | 2007-08-21 | Juki Corporation | Solid lubricant and sliding members |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01169200A (en) | 1989-07-04 |
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