JPS5939399B2 - How to paint slate tiles - Google Patents
How to paint slate tilesInfo
- Publication number
- JPS5939399B2 JPS5939399B2 JP11054677A JP11054677A JPS5939399B2 JP S5939399 B2 JPS5939399 B2 JP S5939399B2 JP 11054677 A JP11054677 A JP 11054677A JP 11054677 A JP11054677 A JP 11054677A JP S5939399 B2 JPS5939399 B2 JP S5939399B2
- Authority
- JP
- Japan
- Prior art keywords
- slate
- tile
- tiles
- coating
- paint
- 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
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明はスレート瓦の粉体塗料塗装方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder coating method for slate tiles.
こうしたスレート瓦のようなセメント製品は水を用いて
水和せしめることにより硬化させるために多量の水を含
有しており、しかも多孔質であるために気孔内にはガス
体が吸蔵されているものである。したがつて、スレート
瓦に粉体塗料を塗装して焼付けた場合には、該瓦に含ま
れている水分あるいはガスがここに形成された塗膜の下
から揮発しようとするために、塗膜は著しく発泡して実
用に供しえないものとなる。Cement products such as slate tiles contain a large amount of water to harden by hydrating them with water, and are porous, so gas is occluded in the pores. It is. Therefore, when a powder coating is applied to a slate tile and baked, the moisture or gas contained in the tile tends to evaporate from under the coating film, causing the coating film to evaporate. foams significantly and becomes unusable.
本発明者らは、かかる欠点ないしは欠陥の存在に鑑みて
鋭意研究の結果、スレート瓦を１３０〜２５０℃に予熱
したのち、熱硬化性粉体塗料を塗着させ、塗膜が十分硬
化される以前に、好ましくはゲル化する以前に、５００
属ＲＨｇ以下の減圧下に保持すれば、かかる極めて短時
間の処理のみで得られる塗膜には殆んど全く発泡は認め
られなく、著し＜当該スレート瓦の発泡性の問題が改善
されることを見出すに及んど、本発明に到達したもので
ある。In view of the existence of such defects, the inventors of the present invention have conducted intensive research and found that after preheating slate tiles to 130 to 250°C, a thermosetting powder coating is applied, and the coating film is sufficiently cured. 500 ml before gelling, preferably before gelling.
If the slate roof tiles are kept under reduced pressure below the RHg, almost no foaming will be observed in the coating film obtained by such extremely short treatment, and the foaming problem of the slate tiles will be significantly improved. By discovering this, we have arrived at the present invention.
本発明方法を詳細に説明すると、スレート瓦をまず工３
０〜２５０℃に予熱し、次いでこの瓦に熱硬化性粉体塗
料を塗着せしめる。To explain the method of the present invention in detail, the slate tiles are first
The tile is preheated to 0 to 250°C, and then a thermosetting powder coating is applied to the tile.
このさいの予熱手段としては遠赤外炉、赤外炉、電気炉
またはバーナー炉などであり、塗装方法としては静電吹
付法、撒布法あるいは流動浸漬法が適当であり、通常２
０〜２００ミクロンの厚さに塗装される。Preheating means at this time include far-infrared furnaces, infrared furnaces, electric furnaces, or burner furnaces, and suitable coating methods include electrostatic spraying, spreading, or fluidized dipping.
Painted to a thickness of 0 to 200 microns.
また、予熱温度は粉体塗料の塗着効率ないしは塗膜の平
滑性から１３０℃以上、特に好ましくは１５０℃以上が
よく、他方、粉体塗料の変質の点から２５０℃以下、特
に２００℃以下が好ましい。次いで、粉体塗料を塗着せ
しめたのち塗膜が硬化する前に５００７ＲｍＨｇ以下の
減圧下で工〜３０分間処理する。In addition, the preheating temperature is preferably 130°C or higher, particularly preferably 150°C or higher, from the viewpoint of powder coating efficiency or coating film smoothness, and on the other hand, 250°C or lower, particularly 200°C or lower, from the viewpoint of deterioration of the powder coating. is preferred. Next, after applying the powder coating, the coating is treated under reduced pressure of 5007 RmHg or less for 30 minutes before the coating film is cured.
そのさい保温のみでもよいが、１３０〜２５０℃の範囲
に加熱加温してもよい。塗膜が硬化してから減圧下に保
持することにすると、減圧時の発泡がそのまま残つて逆
効果となるので、これは避けねばならない。減圧度が５
００ｍｍＨｇ以下であれば本発明方法の効果は認められ
るが、工ｏ０ｍｍＨｇ以下とするのが特に好ましい。At that time, it may be kept warm only, but it may also be heated to a temperature in the range of 130 to 250°C. If the coating film is held under reduced pressure after it has hardened, the foaming caused by the reduced pressure will remain and have the opposite effect, so this must be avoided. Decompression degree is 5
Although the effect of the method of the present invention is recognized as long as the temperature is 00 mmHg or less, it is particularly preferable that the temperature is 0 mmHg or less.
減圧処理時間は前述した通り１〜３０分が適当であるが
、好ましくは２〜５分である。As mentioned above, the appropriate time for the depressurization treatment is 1 to 30 minutes, but preferably 2 to 5 minutes.
かかる減圧処理ののちは常圧に戻して保温するのみでも
よいが、硬化を完全ならしめるべくさらに加熱すること
も亦推奨される。After such a reduced pressure treatment, it is sufficient to simply return the pressure to normal pressure and keep it warm, but it is also recommended to further heat it to ensure complete curing.
次に、実施例により本発明を具体的に説明する。Next, the present invention will be specifically explained with reference to Examples.
実施例厚型スレート瓦を熱風乾燥機で２５０℃の雰囲気
温度に２０分間加熱して瓦の温度を１７０℃に予熱した
。EXAMPLE A thick slate tile was heated in a hot air dryer to an ambient temperature of 250°C for 20 minutes to preheat the tile to 170°C.
次いで、この瓦に「デイツク・パウダーＡ」（大日本イ
ンキ化学工業（株）製アクリル系粉体塗※料：１７０℃
におけるゲル時間 １０分）を吹付法により膜厚１２０
ミクロンに塗着し、直ちに真空加熱乾燥機に入れて５０
ｎＨｇの減圧度、２３０℃の雰囲気温度に３分間保持せ
しめたのち、常圧圧に戻して２３０℃の雰囲気でさらに
１０分間保持した。Next, this tile was coated with "Deitsku Powder A" (acrylic powder paint manufactured by Dainippon Ink & Chemicals Co., Ltd.*: 170℃)
gel time: 10 minutes) to a film thickness of 120
Apply it to a micron size and immediately put it in a vacuum heating dryer for 50 minutes.
After the pressure was reduced to nHg and the ambient temperature was maintained at 230° C. for 3 minutes, the pressure was returned to normal pressure and the atmosphere was maintained at 230° C. for an additional 10 minutes.
かくして得られた塗膜は全く発泡が認められなく、光沢
にもすぐれ、十分に硬化していた。The coating film thus obtained showed no foaming, had excellent gloss, and was sufficiently cured.
※ プラベンダ一に依り、溶融粘度が急激に上昇し始め
るまでの時間として測定したもの。比較例減圧処理は一
切行なわずに２３０℃に１３分間保持した以外は、実施
例と同様の操作を繰り返し行なつた処、得られた塗膜は
著しく発泡していて、もはや実用に供せられるものでは
なかつた。*Measured as the time until the melt viscosity starts to rise rapidly, according to Prabender. Comparative Example The same operation as in Example was repeated, except that the film was held at 230°C for 13 minutes without any vacuum treatment.The resulting coating film was noticeably foamed and could no longer be put to practical use. It wasn't something.
Claims (1)
瓦に熱硬化性粉体塗料を塗着したのち塗膜硬化する前に
５００ｍｍＨｇ以下の減圧下に１〜３０分間加熱してあ
るいは加熱せずに保持し、さらに必換に応じて常圧に加
熱することを特徴とするスレート瓦の塗装方法。1 Preheat a slate tile to 130 to 250°C, then apply a thermosetting powder coating to the tile, and then heat it for 1 to 30 minutes under reduced pressure of 500 mmHg or less or without heating before curing the coating. A method for painting slate tiles, which is characterized by holding the tiles at a constant temperature and heating them to normal pressure when necessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11054677A JPS5939399B2 (en) | 1977-09-16 | 1977-09-16 | How to paint slate tiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11054677A JPS5939399B2 (en) | 1977-09-16 | 1977-09-16 | How to paint slate tiles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5445331A JPS5445331A (en) | 1979-04-10 |
| JPS5939399B2 true JPS5939399B2 (en) | 1984-09-22 |
Family
ID=14538555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11054677A Expired JPS5939399B2 (en) | 1977-09-16 | 1977-09-16 | How to paint slate tiles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939399B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223076A (en) * | 1986-03-19 | 1987-10-01 | 財団法人鉄道総合技術研究所 | Synthetic resin adhesion onto concrete surface |
| JP5464963B2 (en) * | 2009-10-08 | 2014-04-09 | 旭サナック株式会社 | Surface coating method for extruded cement board |
-
1977
- 1977-09-16 JP JP11054677A patent/JPS5939399B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5445331A (en) | 1979-04-10 |
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