JP2948394B2 - Method for manufacturing transparent fluororesin-coated stainless steel sheet - Google Patents
Method for manufacturing transparent fluororesin-coated stainless steel sheetInfo
- Publication number
- JP2948394B2 JP2948394B2 JP35700091A JP35700091A JP2948394B2 JP 2948394 B2 JP2948394 B2 JP 2948394B2 JP 35700091 A JP35700091 A JP 35700091A JP 35700091 A JP35700091 A JP 35700091A JP 2948394 B2 JP2948394 B2 JP 2948394B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- steel sheet
- coating
- transparent fluororesin
- fluororesin
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Description
【００１】[0101]
【産業上の利用分野】本発明は、ステンレス鋼板に塗装
下地処理を施し、その後透明フッ素樹脂で被覆する透明
フッ素樹脂被覆ステンレス鋼板の製造方法において、塗
装下地処理によるステンレス鋼板への外観的影響をなく
する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a transparent fluororesin-coated stainless steel sheet in which a stainless steel sheet is subjected to an undercoat treatment and then coated with a transparent fluororesin. It is about how to get rid of it.
【００２】[0092]
【従来技術】ステンレス鋼板は、その高耐食性、美麗な
金属肌に着目されて、従来より建築材料や家電製品など
に多岐にわたり使用されているが、裸で使用すると、指
紋などの汚れが付着して外観が損なわれ、また、用途に
よっては付着部位から発錆などが懸念される。そこで、
耐食性、耐汚染性に優れたフッ素樹脂で被覆して、これ
らの問題を解消する方法が提案されている。2. Description of the Related Art Stainless steel sheets have been used in a wide variety of construction materials and home electric appliances, focusing on their high corrosion resistance and beautiful metal skin. The appearance may be impaired, and depending on the application, rust may be generated from the adhesion site. Therefore,
A method of solving these problems by coating with a fluororesin having excellent corrosion resistance and stain resistance has been proposed.
【００３】この透明フッ素樹脂での被覆は、ステンレス
鋼板に塗装下地処理を施した後、熱可塑型または熱硬化
型の透明フッ素樹脂塗料を塗装する方法により行われて
いるが、塗装下地処理としては、クロメ−ト系処理、ア
ルカリ処理や水溶性（水分散性）有機化合物水溶液処理
のような非クロメート系処理が使用されている。The coating with the transparent fluororesin is carried out by applying a coating undercoat treatment to a stainless steel plate and then coating a thermoplastic or thermosetting transparent fluororesin paint. Non-chromate treatments such as chromate treatment, alkali treatment and aqueous solution of a water-soluble (water-dispersible) organic compound are used.
【００４】[0093]
【発明が解決しようとする課題】しかし、ステンレス鋼
板は、表面が耐食性の酸化クロム皮膜に覆われ、しか
も、濡れ性に劣るため、反応型、塗布型いずれのクロメ
−ト処理によっても十分なる耐食性を有するクロメ−ト
皮膜を形成することができない。十分なるクロメート皮
膜を形成する方法としては、塗布型クロメート処理の前
にリン酸塩処理を施すことにより濡れ性を向上させる方
法（特公昭６３−６６３９３号）があるが、被膜密着性
には優れているものの、黄色に着色するため、ステンレ
ス鋼板の銀白色外観が損なわれてしまう。However, since the surface of a stainless steel plate is covered with a corrosion-resistant chromium oxide film and has poor wettability, the corrosion resistance is sufficient by both the reaction-type and coating-type chromate treatments. Cannot be formed. As a method of forming a sufficient chromate film, there is a method of improving the wettability by applying a phosphate treatment before the coating type chromate treatment (Japanese Patent Publication No. 63-66393), but the film adhesion is excellent. However, since it is colored yellow, the silver-white appearance of the stainless steel plate is impaired.
【００５】一方、非クロメート系処理の場合、このよう
な着色の問題はないが、被膜密着性がクロメート処理の
場合より劣ってしまう。例えば、水溶性（水分散性）有
機化合物水溶液処理としては、タンニン酸水溶液及び／
又はポリアクリル酸水溶液による処理方法（特開昭５７
−１６１７３号）が知られているが、被膜密着性の向上
は認められるものの、十分ではない。On the other hand, in the case of the non-chromate treatment, there is no such a problem of coloring, but the coating adhesion is inferior to that of the chromate treatment. For example, as the treatment with an aqueous solution of a water-soluble (water-dispersible) organic compound, a tannic acid aqueous solution and / or
Alternatively, a treatment method using an aqueous solution of polyacrylic acid (JP-A-57
No. -16173) is known, but an improvement in coating adhesion is recognized but not sufficient.
【００６】[0086]
【課題を解決するための手段】本発明は、かかる問題を
解決した透明フッ素樹脂被覆ステンレス鋼板の製造方法
を提供するもので、塗装下地処理にコロイダルシリカを
使用することによりステンレス鋼板の美観を損なうこと
なく被膜密着性を向上させたのである。すなわち、本発
明は、ステンレス鋼板の表面にコロイダルシリカを固形
分として２０〜３００ｍｇ／ｍ2塗布して乾燥した後、
透明フッ素樹脂で被覆することを特徴としている。SUMMARY OF THE INVENTION The present invention provides a method for producing a transparent fluororesin-coated stainless steel sheet which has solved the above-mentioned problems. The use of colloidal silica for coating undercoating impairs the appearance of the stainless steel sheet. The coating adhesion was improved without any problems. That is, the present invention applies 20 to 300 mg / m 2 of colloidal silica as a solid content on the surface of a stainless steel plate, and after drying,
It is characterized by being coated with a transparent fluororesin.
【００７】007
【作用】ステンレス鋼板にコロイダルシリカを塗布して
加熱すると、透明なシリカ化合物皮膜となる。コロイダ
ルシリカは、分散剤が水または溶剤の市販のものでよい
が、塗布量は固形分として２０〜３００ｍｇ／ｍ2にす
る。２０ｍｇ／ｍ2未満であると、十分なるフッ素樹脂
の被膜密着性が得られず、３００ｍｇ／ｍ2より多い
と、曲げ加工に対する応力に抗しきれず、かえって被膜
密着性が低下してしまう。When a colloidal silica is applied to a stainless steel plate and heated, a transparent silica compound film is formed. The colloidal silica may be a commercially available dispersant such as water or a solvent, and the coating amount is 20 to 300 mg / m 2 as a solid content. If the amount is less than 20 mg / m 2 , sufficient adhesion of the fluororesin film cannot be obtained, and if it is more than 300 mg / m 2 , the film cannot withstand the stress due to the bending process, and on the contrary, the adhesion of the film decreases.
【００８】塗布したコロイダルシリカは、乾燥して、シ
リカ表面に吸着した水分もしくは溶剤分を除去する。こ
の乾燥によりコロイダルシリカは充填密度の高いシリカ
化合物皮膜になり、耐久性を発揮する。また、コロイダ
ルシリカはその表面に存在するシラノ−ル基により被膜
密着性を向上させる。このコロイダルシリカの乾燥は、
ステンレス鋼板を１５０〜３００℃（到達板温）に加熱
して行うのが好ましい。１５０℃未満であると、シリカ
表面に吸着した水分若しくは溶剤が完全に除去されない
ため、シリカの充填密度が小さく、耐久性に劣り、３０
０℃を超えると、性能上問題はないが、経済的に不利に
なる。The applied colloidal silica is dried to remove water or solvent adsorbed on the silica surface. By this drying, the colloidal silica becomes a silica compound film having a high packing density and exhibits durability. Colloidal silica improves the adhesion of the coating due to silanol groups present on its surface. The drying of this colloidal silica
It is preferable to heat the stainless steel plate to 150 to 300 ° C. (attained plate temperature). If the temperature is lower than 150 ° C., the water or solvent adsorbed on the silica surface is not completely removed, so that the packing density of the silica is low, the durability is poor, and
If it exceeds 0 ° C., there is no problem in performance, but it is economically disadvantageous.
【００９】以上のようにしてシリカ化合物皮膜を形成し
た後に透明フッ素樹脂で被覆する。この被覆は、通常塗
料（ワニス）を塗布して乾燥するのが好ましいが、フィ
ルムラミネ−トのような他の方法で行ってもよい。フッ
素樹脂としては、熱硬化型のものが好ましい。被膜厚
は、用途により決定するが、一般的な用途の場合、５〜
２５μｍで十分である。本発明において、透明フッ素樹
脂とは、カラ−クリア−等の有色のフッ素系樹脂および
塗料を包含するものをいい、無色透明に限定されるもの
ではない。After forming the silica compound film as described above, it is covered with a transparent fluororesin. This coating is usually preferably applied with a paint (varnish) and dried, but may be performed by other methods such as film lamination. As the fluororesin, a thermosetting resin is preferable. The coating thickness is determined depending on the application.
25 μm is sufficient. In the present invention, the transparent fluororesin includes a colored fluororesin such as color clear resin and a paint, and is not limited to colorless and transparent.
【０１０】[0102]
【実施例】板厚０.４ｍｍのステンレス鋼板（ＳＵＳ３
０４）をアルカリ脱脂剤［商品名：ファインクリナ−４
３６０、日本パ−カライジング（株）製］で脱脂して、
水洗した後、コロイダルシリカを塗布した後、加熱して
乾燥した。次に、熱硬化型の透明フッ素樹脂塗料をバ−
コ−タ−で所定の膜厚塗装し、６０秒間（但し、実施例
９の場合は１２０秒）加熱乾燥した。以上のようにして
製造した塗装鋼板に対して、次の試験を実施した。第１
表に製造条件と性能を示す。EXAMPLE A 0.4 mm thick stainless steel plate (SUS3
04) with an alkaline degreasing agent [trade name: Fine Cleaner-4]
360, manufactured by Nippon Parkerizing Co., Ltd.]
After washing with water, colloidal silica was applied, and then heated and dried. Next, a thermosetting transparent fluororesin paint is covered with a bar.
The film was coated with a predetermined thickness using a coater, and dried by heating for 60 seconds (120 seconds in Example 9). The following tests were performed on the coated steel sheets manufactured as described above. First
The table shows the manufacturing conditions and performance.
【０１１】（１）外観 塗装後の外観を目視観察して、着色なしを○、着色を
△、著しく着色を×で評価した。(1) Appearance The appearance after coating was visually observed, and evaluation was given as “○” for no coloring, “△” for coloring, and “×” for marked coloring.
【０１２】（２）塗膜密着性 塗装鋼板をそのまま１８０°折り曲げする一次密着性試
験と沸騰水に２時間浸漬後１８０°折り曲げする二次密
着性試験とを行い、○（優）→△→×（劣）で評価し
た。(2) Coating film adhesion A primary adhesion test in which the coated steel sheet was bent 180 ° as it was and a secondary adhesion test in which the coating steel sheet was immersed in boiling water for 2 hours and then bent 180 ° were performed. X (poor) was evaluated.
【０１３】[0113]
【第１表】 （注）コロイダルシリカの種類 Ａ：水分散型コロイダルシリカ［商品名：スノ−テック
スＯ、日産化学（株）製］ Ｂ：溶剤分散型コロイダルシリカ［商品名：ＮＰＣ−Ｓ
Ｔ、日産化学（株）製］ Ｃ：水分散型コロイダルシリカ［商品名：スノ−テック
スＮ、日産化学（株）製］[Table 1] (Note) Type of colloidal silica A: Water-dispersed colloidal silica [trade name: Sno-Tex O, manufactured by Nissan Chemical Co., Ltd.] B: Solvent dispersed colloidal silica [trade name: NPC-S]
T, manufactured by Nissan Chemical Co., Ltd.] C: Water-dispersed colloidal silica [trade name: Sno-Tex N, manufactured by Nissan Chemical Co., Ltd.]
【０１４】[0141]
【発明の効果】以上のように、本発明の製造方法では、
コロイダルシリカの塗布により透明な塗装下地処理皮膜
を形成できるので、皮膜形成後もステンレス鋼板の外観
に変化がない。このため、その上に透明フッ素樹脂を被
覆すれば、透明フッ素樹脂被覆ステンレス鋼板を製造す
ることができる。また、フッ素樹脂被膜の密着性も優れ
ている。As described above, in the production method of the present invention,
Since a transparent undercoat coating can be formed by applying colloidal silica, the appearance of the stainless steel sheet does not change even after the coating is formed. Therefore, if a transparent fluororesin is coated thereon, a transparent fluororesin-coated stainless steel sheet can be manufactured. Also, the adhesion of the fluororesin coating is excellent.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ３２Ｂ 15/08 １０２ Ｂ３２Ｂ 15/08 １０２Ｂ (72)発明者 畑野 憲文 東京都中央区日本橋１丁目15番１号 日 本パ−カライジング株式会社内 (72)発明者 大山 和幸 東京都中央区日本橋１丁目15番１号 日 本パ−カライジング株式会社内 (56)参考文献 特開 平１−120483（ＪＰ，Ａ) 特開 平２−111865（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B32B 9/00 B05D 3/02 B05D 7/14 B05D 7/24 302 B32B 7/04 B32B 15/08 102 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification symbol FI B32B 15/08 102 B32B 15/08 102B (72) Inventor Norifumi Hatano 1-15-1 Nihonbashi, Chuo-ku, Tokyo (72) Kazuyuki Oyama, Inventor Kazuyuki Oyama 1-15-1 Nihonbashi, Chuo-ku, Tokyo, Japan In-Parkerizing Co., Ltd. (56) References JP-A-1-120483 (JP, A) JP Hei 2-111865 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B32B 9/00 B05D 3/02 B05D 7/14 B05D 7/24 302 B32B 7/04 B32B 15/08 102
Claims (1)
リカを固形分として２０〜３００ｍｇ／ｍ2塗布した
後、該鋼板を到達板温１５０〜３００℃に加熱乾燥し、
次いで透明フッ素樹脂で被覆することを特徴とする透明
フッ素樹脂被覆ステンレス鋼板の製造方法。After applying 20 to 300 mg / m 2 of colloidal silica as a solid content on the surface of a stainless steel sheet, the steel sheet is heated and dried to an ultimate sheet temperature of 150 to 300 ° C.,
Next, a method for producing a transparent fluororesin-coated stainless steel sheet, comprising coating with a transparent fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35700091A JP2948394B2 (en) | 1991-12-25 | 1991-12-25 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35700091A JP2948394B2 (en) | 1991-12-25 | 1991-12-25 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05169584A JPH05169584A (en) | 1993-07-09 |
| JP2948394B2 true JP2948394B2 (en) | 1999-09-13 |
Family
ID=18451862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35700091A Expired - Fee Related JP2948394B2 (en) | 1991-12-25 | 1991-12-25 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2948394B2 (en) |
-
1991
- 1991-12-25 JP JP35700091A patent/JP2948394B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05169584A (en) | 1993-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990622 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |