JPH02127442A - Surface treatment of molded article of fluorinated olefin polymer - Google Patents

Surface treatment of molded article of fluorinated olefin polymer

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Publication number
JPH02127442A
JPH02127442A JP27989188A JP27989188A JPH02127442A JP H02127442 A JPH02127442 A JP H02127442A JP 27989188 A JP27989188 A JP 27989188A JP 27989188 A JP27989188 A JP 27989188A JP H02127442 A JPH02127442 A JP H02127442A
Authority
JP
Japan
Prior art keywords
molded article
olefin polymer
fluorinated olefin
low
temperature plasma
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
Application number
JP27989188A
Other languages
Japanese (ja)
Inventor
Takeshi Nakaitsu
中逸 雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitika Ltd
Original Assignee
Unitika Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unitika Ltd filed Critical Unitika Ltd
Priority to JP27989188A priority Critical patent/JPH02127442A/en
Publication of JPH02127442A publication Critical patent/JPH02127442A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To safely and simply modify adhesive and wetting characteristic of surface of molded article by treating the molded article of fluorinated olefin polymer with low-temperature plasma of a gas consisting essentially of hydro gen. CONSTITUTION:For example, a molded article of fluorinated olefin polymer such as sheet, etc., of polytetrafluoroethylene is put in a low-temperature plasma treating device, the device is adjusted to 0.01-1Torr, charged with a gas compris ing hydrogen as a main component and preferably gases such as argon or meth ane (>=50vol.% hydrogen gas or 100vol.% hydrogen gas), the device is adjusted to 0.1-5Torr, 0.1-0.5W/cm high-frequency power is impressed to electrodes and the molded article is treated preferably for 30-180 seconds to give the aimed surface treated molded article.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は2フッ化オレフィン重合体成形物の表面処理方
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 surface treatment of a molded product of a difluorinated olefin polymer.

(従来の技術) フッ化オレフィン重合体成形物は、電気的緒特性、耐熱
性、耐薬品性等にすぐれているため、多くの用途に使用
されている。しかし、フッ化オレフィン重合体は、一般
にその表面が非常に不活性で、接着性や濡れ性が悪い。
(Prior Art) Fluorinated olefin polymer molded products have excellent electrical properties, heat resistance, chemical resistance, etc., and are therefore used for many purposes. However, fluorinated olefin polymers generally have very inert surfaces and poor adhesion and wettability.

通常のプラスチック成形物の表面を改質する手法として
は、物理的な表面粗化やコロナ放電処理。
Methods for modifying the surface of ordinary plastic molded products include physical surface roughening and corona discharge treatment.

低温プラズマ処理などが知られているが、フッ化オレフ
ィン重合体成形物の場合にはこのような従来の手法では
ほとんど効果がなく、従ってフッ化オレフィン重合体成
形物の表面処理には、金属ナトリウムなどのアルカリ金
属をナフタリンとテトラヒドロフランとの混合溶液、あ
るいは液体アンモニアに溶解した溶液で処理する方法が
用いられている。
Low-temperature plasma treatment is known, but such conventional methods have little effect on molded fluorinated olefin polymers. A method of treating alkali metals, such as, with a mixed solution of naphthalene and tetrahydrofuran, or a solution dissolved in liquid ammonia, is used.

上記のようなアルカリ金属を用いる従来の方法では、処
理操作時の危険性が高く、また処理品が褐色に着色して
商品価値が下るなどの問題があった。
Conventional methods using alkali metals as described above have problems such as high risks during treatment operations, and the treated products are colored brown, reducing their commercial value.

(発明が解決しようとする問題点) 従来から使用されることの多い酸素、アルゴン。(Problem that the invention attempts to solve) Oxygen and argon are commonly used.

窒素等のガスを用いた低温プラズマ処理では、上述のよ
うに接着性や濡れ性の改良にほとんど効果はないが2本
発明者はメタンを主成分とするガスの低温プラズマでフ
ッ化オレフィン重合体成形物の表面を処理すると特異的
にその表面の接着性や濡れ性が向上することを見出し、
先に特願昭63−134762号にてこの方法を提案し
た。
Low-temperature plasma treatment using a gas such as nitrogen has little effect on improving adhesion or wettability as mentioned above. We discovered that treating the surface of molded products specifically improves the adhesion and wettability of that surface.
This method was previously proposed in Japanese Patent Application No. 63-134762.

しかしながら、メタンを主成分とするガスの低温プラズ
マ処理においては、長時間連続処理を行った場合、メタ
ンがプラズマ重合することにより低温ブラズ′7処理機
の内部が汚染し、定期的に清掃をしなければならなかっ
た。
However, in low-temperature plasma treatment of a gas whose main component is methane, if the treatment is carried out continuously for a long time, the inside of the low-temperature plasma processing machine becomes contaminated due to plasma polymerization of methane, which requires periodic cleaning. I had to.

(問題点を解決するだめの手段) 本発明者は、このような問題点を解決するために鋭意検
討の結果2 フッ化オレフィン重合体成形物を特定ガス
、すなわち水素の低温プラズマで処理する場合に限って
、接着性や濡れ性が大きく改良されるとともに、処理機
の内部の汚染も少ないことを見出し1本発明に到達した
(Means for Solving the Problems) The present inventor has conducted extensive studies to solve these problems. 2. When a fluorinated olefin polymer molded product is treated with a low-temperature plasma of a specific gas, that is, hydrogen. The inventors have discovered that the adhesiveness and wettability are greatly improved, and the inside of the processing machine is less contaminated, and the present invention has been achieved.

すなわち本発明は、フッ化オレフィン重合体成形物を、
水素を主成分とするガスの低温プラズマで処理すること
を特徴とするフッ化オレフィン重合体成形物の表面処理
法を要旨とするものである。
That is, the present invention provides a fluorinated olefin polymer molded product,
The gist of this paper is a method for surface treatment of fluorinated olefin polymer molded articles, which is characterized by treatment with low-temperature plasma of a gas containing hydrogen as a main component.

以下1本発明の詳細な説明する。Hereinafter, one aspect of the present invention will be explained in detail.

本発明におけるフッ化オレフィン重合体としては、4フ
ツ化エチレン、6フツ化プロピレン等のフッ素系モノマ
ーの重合体あるいはこれらのモノマーとオレフィンとの
共重合体があり、特にポリテトラフルオロエチレンをそ
の代表的な重合体としてあげることができる。
The fluorinated olefin polymer in the present invention includes polymers of fluorine-based monomers such as tetrafluoroethylene and hexafluoropropylene, or copolymers of these monomers and olefins, and polytetrafluoroethylene is particularly representative. It can be mentioned as a typical polymer.

これらの成形体としてはフィルム、シートあるいはガラ
スクロスを補強材としたシート、テープなどがある。
These molded bodies include films, sheets, sheets using glass cloth as a reinforcing material, and tapes.

低温プラズマ処理は公知の装置、たとえば「繊維機械学
会誌」第38巻、隘4(1985年)の第188頁に記
載されているものが使用できる。
For the low-temperature plasma treatment, a known apparatus can be used, for example, the one described in "Journal of the Textile Machinery Society", Vol. 38, No. 4 (1985), p. 188.

この装置は低圧が維持できる真空容器内に放電用の電極
を設け、特定のガスを所定流量で導入でき、付設した真
空ポンプにより容器内を排気し。
This device has a discharge electrode inside a vacuum container that can maintain a low pressure, allows a specific gas to be introduced at a predetermined flow rate, and evacuates the inside of the container using an attached vacuum pump.

一定圧に保つことができる構造と性能を有する装置であ
る。この装置内の電極に電圧を印加ずればグロー放電を
起し、導入したガスが低温プラズマ状態となる。最も一
般的には13.56 Ml[zの高周波電力を印加する
。電極間に形成した低温プラズマ中を処理すべきシート
、フィルム等を所望の速度で通過させることにより、低
温プラズマ処理を行うことができる。
This device has the structure and performance to maintain a constant pressure. When a voltage is applied to the electrodes in this device, a glow discharge occurs, and the introduced gas becomes a low-temperature plasma. Most commonly, a high frequency power of 13.56 Ml[z is applied. Low-temperature plasma treatment can be performed by passing a sheet, film, etc. to be treated through low-temperature plasma formed between electrodes at a desired speed.

具体的には、まず処理すべきフッ化オレフィン重合体成
形物3例えばポリテトラフルオロエチレンのシートを真
空容器内に収容し、真空ポンプにより排気減圧して内圧
を0,01〜1Torrに調節する。次いで水素を主体
とするガスを導入して。
Specifically, first, a fluorinated olefin polymer molded product 3 to be treated, such as a sheet of polytetrafluoroethylene, is placed in a vacuum container, and the internal pressure is adjusted to 0.01 to 1 Torr by exhausting and reducing the pressure using a vacuum pump. Next, a gas consisting mainly of hydrogen was introduced.

0.1〜5Torr 、好ましくは0.5〜2Torr
に調整する。このとき水素ガスは容積%で50%以上含
まれていることが必要であり、もちろん水素100%で
もよい。水素のほかに含まれるガスとしてはアルゴン、
ヘリウムな゛どの不活性ガスやメタンなどが好ましい。
0.1 to 5 Torr, preferably 0.5 to 2 Torr
Adjust to. At this time, it is necessary that the hydrogen gas is contained in an amount of 50% or more by volume, and of course it may be 100% hydrogen. In addition to hydrogen, other gases include argon,
Inert gases such as helium, methane, etc. are preferred.

このような状態で容器内の電極に高周波電力を印加すれ
ば、導入されたガスが低温プラズマ状態となる。高周波
電力は0.1〜0.5W/cJ (電極単位面積)程度
が適当である。
When high-frequency power is applied to the electrodes in the container in this state, the introduced gas becomes a low-temperature plasma state. Appropriate high frequency power is about 0.1 to 0.5 W/cJ (unit area of electrode).

この低温プラズマ雰囲気中に、先に収容しておいたポリ
テトラフルオロエチレンのシートを通過させることによ
り、低温プラズマ処理を行うことができる。
A low-temperature plasma treatment can be performed by passing the previously housed polytetrafluoroethylene sheet through this low-temperature plasma atmosphere.

処理時間は2通常数秒〜300秒、好ましくは30〜1
80秒である。
The processing time is 2 usually several seconds to 300 seconds, preferably 30 to 1
It is 80 seconds.

(作 用) 有機高分子化合物を低温プラズマ処理することにより、
その表面特性、特に接着性や濡れ性を改良することがで
きることは公知の事実として広く知られているが、この
方法をそのままフッ化オレフィン重合体成形物に利用し
てみてもほとんど効果がない。
(Function) By treating organic polymer compounds with low-temperature plasma,
Although it is widely known that surface properties, particularly adhesiveness and wettability, can be improved, this method has almost no effect when directly applied to molded fluorinated olefin polymers.

例えば1表面改質の最も代表的な酸素プラズマによる処
理の場合には1通常の有機高分子では酸素が反応し表面
は極性基化されて水との接触角は大きく低下し、接着力
が向上するのであるが、このことはESCA (X線光
電子スペクトル分析)による表面元素の分析結果からも
確認することができ、酸素プラズマで処理したものは表
面の元素構成比率において酸素の比率が高くなる。そし
て酸素以り(のプラズマ、例えば不活性ガスに属するア
ルゴンのプラズマの場合でも、同様の効果が認められて
おり、これはアルゴンのプラズマ処理によって形成され
たラジカルに、処理後空気中の酸素が反応してとりこま
れるためであると説明さている。
For example, in the case of oxygen plasma treatment, which is the most typical surface modification method, oxygen reacts with ordinary organic polymers and the surface becomes polarized, greatly reducing the contact angle with water and improving adhesive strength. However, this can also be confirmed from the analysis results of surface elements by ESCA (X-ray photoelectron spectroscopy), and those treated with oxygen plasma have a higher proportion of oxygen in the element composition ratio of the surface. A similar effect has also been observed in the case of plasmas other than oxygen, such as argon plasma, which belongs to an inert gas. It is explained that this is because they react and become absorbed.

これに対して、フッ化オレフィン重合体の場合は、これ
らの低温プラズマ処理ではほとんど効果がなく、ESC
A分析結果でも酸素はとりこまれず、炭素、フッ素の原
素比率はほとんど変化していない。
On the other hand, in the case of fluorinated olefin polymers, these low-temperature plasma treatments have little effect, and ESC
Even in the A analysis results, oxygen was not incorporated, and the atomic ratios of carbon and fluorine remained almost unchanged.

ところが本発明者は、以前にメタンを主成分とした低温
プラズマで処理を行うと、特異的にフッ化オレフィン重
合体の表面に接着力向上効果、濡れ性向上効果が認めら
れるようになり、ESCA分析結果でもフッ素元素比率
が大きく低下し炭素元素比率が高くなり、しかも少量で
はあるが酸素元素もとりこまれていることを見出してい
る。これはメタンガスがプラズマ重合してフッ化オレフ
ィン重合体の表面にデポジションし、しかも一部はフッ
化オレフィン重合体のポリマー鎮に反応している結果で
あると推定される。その結果、フッ化オレフィン重合体
成形物の表面の濡れ性が改良されて、接着性が向上する
ものと考えられる。
However, the present inventor previously discovered that when treated with low-temperature plasma containing methane as the main component, a specific adhesion and wettability improvement effect was observed on the surface of the fluorinated olefin polymer. The analysis results also showed that the fluorine element ratio decreased significantly, the carbon element ratio increased, and even a small amount of oxygen element was incorporated. This is presumed to be the result of plasma polymerization of methane gas, which is deposited on the surface of the fluorinated olefin polymer, and in addition, a portion of the methane gas reacts with the polymer base of the fluorinated olefin polymer. As a result, it is thought that the wettability of the surface of the fluorinated olefin polymer molded article is improved and the adhesiveness is improved.

これに対して1本発明方法の如く、水素を主成分とする
ガスの低温プラズマで処理した場合には。
On the other hand, when the treatment is performed with low-temperature plasma of a gas containing hydrogen as the main component, as in the method of the present invention.

フッ素元素と炭素元素の比率の変化は、メタンガスの低
温プラズマ処理の場合はど変化していないが2表面張力
や接着力の改質効果は、従来のナトリウム処理以上の効
果を有していることが判明した。これは、ESCAによ
る分析結果から、そのスペクトルがナトリウム処理品に
近くなっていることから、“フッ素−炭素”の結合が“
水素−炭素”の結合に変化し、メタンガスの低温プラズ
マとは機構が異なり、フッ化オレフィン重合体の一部の
フッ素が離脱した結果、改質効果が得られたものと考え
られる。
Although the change in the ratio of fluorine element to carbon element does not change in the case of low-temperature plasma treatment of methane gas, the effect of modifying surface tension and adhesive strength is more effective than that of conventional sodium treatment. There was found. The ESCA analysis results show that the spectrum is close to that of the sodium-treated product, which indicates that the fluorine-carbon bond is
The mechanism is different from that of low-temperature plasma of methane gas, and it is thought that the reforming effect was obtained as a result of some of the fluorine being released from the fluorinated olefin polymer.

さらに、この水素を主成分とするガスの低温プラズマの
場合はプラズマ重合が起こらないので処理機の内部を汚
染することがなくなり、掃除をする必要もな(、また、
処理そのものに悪影曾を及ぼすこともない。
Furthermore, in the case of low-temperature plasma of gas whose main component is hydrogen, plasma polymerization does not occur, so there is no need to contaminate the inside of the processing machine, and there is no need to clean it.
It does not have any negative impact on the processing itself.

(実施例) 次に1本発明を実施例により説明する。(Example) Next, one embodiment of the present invention will be explained with reference to examples.

実施例1 厚さ0 、2 m11のポリテトラフルオロエチレンの
シートを下記の低温プラズマ処理条件1にて低温プラズ
マ処理した。
Example 1 A sheet of polytetrafluoroethylene with a thickness of 0.2 m11 was subjected to low temperature plasma treatment under the following low temperature plasma treatment conditions 1.

低温プラズマ処理条件1 処理後の試料のポリテトラフルオロエチレンシートに、
凸版印刷■製の粘着テープTFG−203(フッ素樹脂
含浸ガラスクロステープ)を貼り付は室温で24時間放
置後、 100 wm/minの引張速度で角度180
°にてビーリングテストを行った結果。
Low-temperature plasma treatment conditions 1 After treatment, the polytetrafluoroethylene sheet of the sample is
Adhesive tape TFG-203 (fluororesin-impregnated glass cloth tape) manufactured by Toppan Printing ■ was applied after being left at room temperature for 24 hours, and then stretched at an angle of 180 at a pulling speed of 100 wm/min.
Results of a beer ring test at °.

剥離強力は2100gであった。The peel strength was 2100 g.

これに対して低温プラズマ処理を行わない未処理のポリ
テトラフルオロエチレンシートについて全く同様のテス
トを行った結果、剥離強力は85gであった。
On the other hand, a similar test was conducted on an untreated polytetrafluoroethylene sheet that was not subjected to low-temperature plasma treatment, and as a result, the peel strength was 85 g.

次にこの処理を50回繰り返し実施した後、処理機の内
部を観察したところ、清浄で異常はなかった。
Next, after repeating this process 50 times, the inside of the processing machine was observed and found to be clean and without any abnormality.

さらに本発明方法との比較のため1本実施例における低
温プラズマ処理条件1の水素100%にかえて、これを
メタン100%とするほかは9本実施例と全く同一の方
法により、比較用の試料を得た。
Furthermore, for comparison with the method of the present invention, a comparative sample was prepared using the same method as in this example except that 100% methane was used instead of 100% hydrogen in low-temperature plasma treatment condition 1 in this example. A sample was obtained.

この試料について本実施例と同一条件のピーリングテス
トを行った結果、剥離強力は1850gで1本発明方法
の2100gよりかなり劣っていた。
A peeling test was conducted on this sample under the same conditions as in this example, and the peel strength was 1,850 g, which was considerably inferior to the 2,100 g obtained by the method of the present invention.

また、この処理を50回操り返し実施した後。Also, after repeating this process 50 times.

処理機の内部を観察したところ、黄褐色の重合体が電極
の表面や処理機の内壁に付着して汚れていた。
When the inside of the processing machine was observed, it was found that a yellow-brown polymer had adhered to the surface of the electrodes and the inner wall of the processing machine, making it dirty.

(発明の効果) 本発明は、フッ化オレフィン重合体成形物の表面を、水
素を主成分とするガスの低温プラズマで処理する構成を
有し、かかる構成の本発明によれば、フッ化オレフィン
重合体成形物の表面を容易にしかも安全に接着性の良好
な表面に改質することができる。
(Effects of the Invention) The present invention has a configuration in which the surface of a fluorinated olefin polymer molded product is treated with low-temperature plasma of a gas containing hydrogen as a main component. The surface of a polymer molded article can be easily and safely modified to have a surface with good adhesive properties.

また、この良好な接着性能を利用して、フッ化オレフィ
ン重合体成形物を所望の部材に接着すれば1該部材にフ
ッ化オレフィン重合体のもつ電気的特性や熱的、化学的
安定性などの良好な特性を付与することができるように
なる。
In addition, if a fluorinated olefin polymer molded product is bonded to a desired member by utilizing this good adhesive performance, it is possible to bond the fluorinated olefin polymer molded product to the desired member. This makes it possible to impart good properties.

Claims (1)

【特許請求の範囲】[Claims] (1)フッ化オレフィン重合体成形物を、水素を主成分
とするガスの低温プラズマで処理することを特徴とする
フッ化オレフィン重合体成形物の表面処理法。
(1) A method for surface treatment of a fluorinated olefin polymer molded article, which comprises treating the fluorinated olefin polymer molded article with low-temperature plasma of a gas containing hydrogen as a main component.
JP27989188A 1988-11-04 1988-11-04 Surface treatment of molded article of fluorinated olefin polymer Pending JPH02127442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27989188A JPH02127442A (en) 1988-11-04 1988-11-04 Surface treatment of molded article of fluorinated olefin polymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27989188A JPH02127442A (en) 1988-11-04 1988-11-04 Surface treatment of molded article of fluorinated olefin polymer

Publications (1)

Publication Number Publication Date
JPH02127442A true JPH02127442A (en) 1990-05-16

Family

ID=17617368

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27989188A Pending JPH02127442A (en) 1988-11-04 1988-11-04 Surface treatment of molded article of fluorinated olefin polymer

Country Status (1)

Country Link
JP (1) JPH02127442A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026811A1 (en) * 1993-05-12 1994-11-24 British Technology Group Limited (Gb) Producing a layer on a substrate
US5470617A (en) * 1993-10-15 1995-11-28 Kurashishiki Boseki Kabushiki Kaisha Process for modifying the surfaces of the molded materials made of fluorine resins
US5594260A (en) * 1993-09-03 1997-01-14 Rohm Co., Ltd. Photoelectric converter with photoelectric conversion devices mounted separately from wiring boards
US5635257A (en) * 1994-05-10 1997-06-03 Kurashiki Boseki Kabushiki Kaisha Process for hydrophilizing a porous material made of fluorine resin
JP2022543600A (en) * 2020-11-05 2022-10-13 中国長江三峡集団有限公司 Manufacturing method and application of PTFE-based nano-functional composite membrane
JP2023503686A (en) * 2020-11-05 2023-01-31 中国長江三峡集団有限公司 Nano-depth surface activation method for PTFE-based membrane

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026811A1 (en) * 1993-05-12 1994-11-24 British Technology Group Limited (Gb) Producing a layer on a substrate
US5594260A (en) * 1993-09-03 1997-01-14 Rohm Co., Ltd. Photoelectric converter with photoelectric conversion devices mounted separately from wiring boards
US5470617A (en) * 1993-10-15 1995-11-28 Kurashishiki Boseki Kabushiki Kaisha Process for modifying the surfaces of the molded materials made of fluorine resins
US5635257A (en) * 1994-05-10 1997-06-03 Kurashiki Boseki Kabushiki Kaisha Process for hydrophilizing a porous material made of fluorine resin
JP2022543600A (en) * 2020-11-05 2022-10-13 中国長江三峡集団有限公司 Manufacturing method and application of PTFE-based nano-functional composite membrane
JP2023503686A (en) * 2020-11-05 2023-01-31 中国長江三峡集団有限公司 Nano-depth surface activation method for PTFE-based membrane

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