JPH07256821A - High hardness painted metal panel for lining turnnel - Google Patents
High hardness painted metal panel for lining turnnelInfo
- Publication number
- JPH07256821A JPH07256821A JP6075378A JP7537894A JPH07256821A JP H07256821 A JPH07256821 A JP H07256821A JP 6075378 A JP6075378 A JP 6075378A JP 7537894 A JP7537894 A JP 7537894A JP H07256821 A JPH07256821 A JP H07256821A
- Authority
- JP
- Japan
- Prior art keywords
- film
- spherical glass
- glass beads
- coating film
- thickness
- 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
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 239000011521 glass Substances 0.000 claims abstract description 23
- 239000011324 bead Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229920000728 polyester Polymers 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 40
- 238000000576 coating method Methods 0.000 claims description 40
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 8
- 239000003973 paint Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 238000001723 curing Methods 0.000 description 6
- 229920001225 polyester resin Polymers 0.000 description 5
- 239000004645 polyester resin Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010454 slate Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001227 electron beam curing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 102200124760 rs587777729 Human genes 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 sulfonic acid compound Chemical class 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、塗膜硬度が高く、洗浄
回復性、耐候性に優れたトンネル内装用塗装金属板に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated metal sheet for tunnel interior, which has a high coating film hardness and is excellent in washing recovery and weather resistance.
【０００２】[0002]
【従来技術】高速道路のトンネルは、コンクリ−ト仕上
げであると、設置照明や自動車のライトの反射がないた
め、内部が暗くなり、運転者を不安にするので、視覚反
射性をある程度備えた白色系統の内装板で内装してい
る。しかし、内装した場合、内装板は土ぼこりや排気ガ
ス中のカ−ボンなどの付着で汚れ、光の反射性が低下し
てしまうので、定期的にブラシ洗浄方式の洗浄機で内装
板を洗浄している。このため、トンネルの内装板として
は、視覚反射性と洗浄回復性を必要とする。2. Description of the Related Art Highway tunnels with a concrete finish have a certain degree of visual reflectivity because they do not reflect the installation lighting or the lights of automobiles, which makes the interior dark and makes the driver uneasy. The interior is white. However, when the interior is installed, the interior board becomes dirty due to dust and carbon adhering to the exhaust gas, and the light reflectivity deteriorates.Therefore, clean the interior board with a brush cleaning system regularly. ing. Therefore, the interior plate of the tunnel needs visual reflectivity and wash recoverability.
【０００３】ところで、内装板としては、当初石綿スレ
−ト板が使用されていたが、スレ−ト板は土ぼこりや排
気ガス中のカ−ボンなどで汚れ易く、しかも、表面の凹
凸が大きいため、いったん汚れると、洗浄機で洗浄して
も十分除去できないものであった。また、汚れを除去す
るのに高圧水とブラシを利用した洗浄機を使用すると、
石綿スレ−ト板は強度が弱いため、場所によっては割れ
てしまう場合があった。By the way, asbestos slate plate was initially used as the interior plate, but the slate plate is apt to be contaminated by dust or carbon in the exhaust gas, and the surface irregularities are large. Once it got dirty, it could not be removed sufficiently even if it was washed with a washing machine. Also, if you use a washing machine that uses high pressure water and a brush to remove dirt,
Since the asbestos-slate plate has low strength, it may be broken depending on the place.
【０００４】そこで、近年では、石綿スレ−ト板に代わ
り塗装金属板が使用されるようになってきた。この塗装
金属板としては、（１）電子線硬化型アクリル系樹脂塗
料の塗装金属板、（２）無機系塗料の塗装金属板などが
あるが、（１）の塗装金属板は塗料が高価で、塗料を硬
化させるのに特殊な電子線硬化設備を必要とするため、
製造コストが高くなるという問題があった。また、電子
線硬化型塗料は耐候性が劣るため、耐久性が不十分であ
った。（２）の塗装金属板は塗料の乾燥に長時間の焼き
付け時間を必要とするため、生産性が劣るという問題が
あった。Therefore, in recent years, coated metal plates have come to be used in place of asbestos slate plates. As the coated metal plate, there are (1) a coated metal plate of an electron beam curable acrylic resin paint, (2) a coated metal plate of an inorganic paint, and the like, but the coated metal plate of (1) is expensive. , Because special electron beam curing equipment is required to cure the paint,
There is a problem that the manufacturing cost becomes high. Further, the electron beam curable coating material has poor weather resistance, and thus has insufficient durability. The coated metal plate of (2) requires a long baking time for drying the paint, and thus has a problem of poor productivity.
【０００５】上記のような問題は、エポキシ系やポリエ
ステル系樹脂等の下塗り塗膜の上にアクリル系、ポリエ
ステル系樹脂等の上塗り塗膜を形成した従来のプレコ−
ト金属板を使用すれば、焼き付け硬化方式の連続塗装ラ
インで安価に製造できるので、解決できるが、焼き付け
硬化型の塗料では鉛筆硬度３Ｈ以下の塗膜にしかならな
いという問題があった。The above-mentioned problems are caused by a conventional precoating method in which an acrylic or polyester resin topcoat is formed on an epoxy or polyester resin undercoat.
If a metal plate is used, it can be manufactured at a low cost on a baking-hardening type continuous coating line, but the problem can be solved. However, the baking-hardening type paint has a problem that the coating film has a pencil hardness of 3H or less.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、これらの点
に鑑み、安価で、生産性に優れたトンネル内装用高硬度
塗装金属板を提供するものである。SUMMARY OF THE INVENTION In view of these points, the present invention provides a high hardness coated metal plate for tunnel interior which is inexpensive and excellent in productivity.
【０００７】[0007]
【課題を解決するための手段】本発明は、下塗り塗膜と
ポリエステル系上塗り塗膜を有する塗装金属板におい
て、前記上塗り塗膜の塗膜厚を１０〜５０μｍにすると
ともに、塗膜中に平均粒径５〜７５μｍの球状ガラスビ
−ズを２０〜４０ｗｔ％添加し、塗膜厚Ｔと球状ガラス
ビ−ズの平均粒径ｒとの関係が０.５≦ｒ/Ｔ≦１.５に
した。The present invention relates to a coated metal plate having an undercoating film and a polyester-based topcoating film, wherein the thickness of the above-mentioned topcoating film is 10 to 50 μm and the average in the coating film is Spherical glass beads having a particle diameter of 5 to 75 μm were added in an amount of 20 to 40 wt% so that the relationship between the coating thickness T and the average particle diameter r of the spherical glass beads was 0.5 ≦ r / T ≦ 1.5.
【０００８】[0008]
【作用】本発明での金属板には、特に限定はなく、例え
ば、冷延鋼板、各種めっき鋼板、ステンレス鋼板、アル
ミニウム板に代表される非鉄金属板のいずれでもよい。
しかし、トンネル内は腐食物質を含有する排ガスにさら
されるので、ステンレス鋼板が好ましい。この金属板に
は、下塗り塗膜を形成する前に金属板の種類、表面状態
に応じて機械的研磨、酸洗、化成処理（リン酸塩処理、
クロメ−ト処理など）を施して、塗膜密着性を高めるの
が好ましい。The metal plate in the present invention is not particularly limited, and may be, for example, any of cold rolled steel plates, various plated steel plates, stainless steel plates, and non-ferrous metal plates represented by aluminum plates.
However, since the inside of the tunnel is exposed to the exhaust gas containing the corrosive substance, the stainless steel plate is preferable. This metal plate has mechanical polishing, pickling, and chemical conversion treatments (phosphate treatment, phosphate treatment, depending on the type and surface condition of the metal plate before forming the undercoat coating film).
Chromate treatment etc.) is preferably applied to enhance the adhesion of the coating film.
【０００９】下塗り塗膜は、エポキシ系、ポリエステル
系樹脂を主成分とする塗料を塗装して、焼き付け硬化さ
せたものが好ましい。また、塗料中には、硬化剤、例え
ば、メラミン、尿素、イソシアネ−トなどを添加して、
塗膜硬度を高くするのが好ましい。It is preferable that the undercoat coating film is obtained by coating a paint containing an epoxy resin or a polyester resin as a main component, followed by baking and curing. Further, in the paint, a curing agent, for example, melamine, urea, isocyanate, etc. are added,
Higher coating hardness is preferred.
【００１０】上塗り塗膜は、ポリエステル系樹脂を主成
分とする塗料を塗装して、焼き付け硬化させたものが好
ましい。塗料中には、塗膜硬度を高くするために硬化剤
（例えば、ブチル化メラミン）を、また、短時間に硬化
させるために触媒（例えば、スルホン酸化合物）を添加
するのが好ましい。しかし、ポリエステル系塗膜は、硬
化剤を添加しても、洗浄機のブラシ洗浄に耐えるほどの
硬度を有していない。色調は視覚反射性の優れた白色系
にするのが好ましい。The top coating film is preferably a coating composition containing a polyester resin as a main component, which is baked and cured. It is preferable to add a curing agent (for example, butylated melamine) to the coating material for increasing the hardness of the coating film, and a catalyst (for example, sulfonic acid compound) for curing in a short time. However, even if a curing agent is added, the polyester coating film does not have hardness enough to withstand brush cleaning in a cleaning machine. It is preferable that the color tone is white, which has excellent visual reflectivity.
【００１１】そこで、本発明では、フィラ−を添加し
て、塗膜硬度を高くしたのである。汎用フィラ−として
は、シリカ、マイカなどの粉末があるが、これらは表面
が平滑でないため、いったん汚染物が付着すると除去が
困難になる。本発明者らはこれを解決するために種々の
フィラ−について検討した結果、球状ガラスビ−ズが適
していることを見いだした。すなわち、球状ガラスビ−
ズは表面が平滑なため、自動車のライトや照明のような
光源方向への光反射性が優れているため、高い視覚反射
率を有し、トンネル内を明るくする。球状ガラスビ−ズ
より安価なフィラ−としては、ガラス粉末の添加も考え
られるが、高い視覚反射率が得られない。Therefore, in the present invention, a filler is added to increase the hardness of the coating film. As a general-purpose filler, there are powders of silica, mica and the like, but since the surface of these powders is not smooth, it becomes difficult to remove once contaminants adhere. The present inventors have examined various fillers to solve this problem and found that spherical glass beads are suitable. That is, spherical glass beads
Since the surface is smooth, it has excellent light reflectance in the direction of light sources such as automobile lights and lighting, and thus has a high visual reflectance and brightens the inside of the tunnel. As a filler cheaper than the spherical glass beads, glass powder may be added, but a high visual reflectance cannot be obtained.
【００１２】球状ガラスビ−ズは、単に上塗り塗膜に添
加しただけでは高硬度の塗膜や洗浄回復性がえられない
ので、上塗り塗膜の塗膜厚を１０〜５０μｍにするとと
もに、球状ガラスビ−ズの平均粒径を５〜７５μｍにし
て、塗膜中に２０〜４０ｗｔ％添加し、塗膜厚Ｔと球状
ガラスビ−ズの平均粒径ｒとの関係が０.５≦ｒ/Ｔ≦
１.５にする。ここで、上塗り塗膜の塗膜厚を１０〜５
０μｍにしたのは、上塗り塗膜が１０μｍ未満である
と、添加球状ガラスビ−ズの平均粒径が５μｍと小さく
ても、ブラシ洗浄の際に球状ガラスビ−ズが脱落し易く
なり、５０μｍを越えると、短時間焼き付け硬化の際に
ワキが発生し易くなるからである。また、球状ガラスビ
−ズの平均粒径を５〜７５μｍにしたのは、５μｍ未満
であると、反射性が劣り、７５μｍを越えると、上塗り
塗膜の塗膜厚を５０μｍにしても球状ガラスビ−ズを安
定して保持できないからである。Since spherical glass beads cannot provide a coating film with high hardness and washing recovery by simply adding them to the top coating film, the coating film thickness of the top coating film is set to 10 to 50 μm and the spherical glass beads are used. The average particle size of the beads is 5 to 75 μm, and 20 to 40 wt% is added to the coating film, and the relationship between the coating thickness T and the average particle size r of the spherical glass beads is 0.5 ≦ r / T ≦.
Set to 1.5. Here, the coating thickness of the top coating film is 10 to 5
The reason for setting the thickness to 0 μm is that if the top coat film is less than 10 μm, the spherical glass beads easily fall off during brush cleaning, even if the average particle size of the added spherical glass beads is as small as 5 μm, and exceeds 50 μm. This is because armpits are likely to occur during baking and curing for a short time. When the average particle size of the spherical glass beads is 5 to 75 μm, the reflectivity is poor when it is less than 5 μm, and when it exceeds 75 μm, the spherical glass beads are formed even if the coating film thickness of the top coat film is 50 μm. This is because it is not possible to stably hold the gap.
【００１３】球状ガラスビ−ズの平均粒径ｒと塗膜厚Ｔ
の比ｒ/Ｔが０.５未満であると、球状ガラスビ−ズが塗
膜表面にあまり露出しないため、十分な塗膜硬度、反射
性および耐候性が得られない。一方、ｒ/Ｔが１.５を越
えると、塗膜表面の凹凸が大きくなり過ぎて、洗浄回復
性が低下する。また、球状ガラスビ−ズの添加量が２０
ｗｔ％未満であると、必要とする塗膜硬度が得られず、
４０ｗｔ％を越えると、塗膜表面の凹凸が大きくなり過
ぎて、洗浄回復性が低下する。Average particle size r of spherical glass beads and coating thickness T
If the ratio r / T is less than 0.5, the spherical glass beads are not exposed to the coating film surface so much that sufficient coating film hardness, reflectivity and weather resistance cannot be obtained. On the other hand, when r / T exceeds 1.5, the surface roughness of the coating film becomes too large and the cleaning recovery property deteriorates. The addition amount of spherical glass beads is 20.
If it is less than wt%, the required coating film hardness cannot be obtained,
If it exceeds 40 wt%, the unevenness of the coating film surface becomes too large, and the cleaning recovery property deteriorates.
【００１４】[0014]
【実施例】ステンレス鋼板にクロメ−ト処理（クロム付
着量２０ｍｇ/ｍ2）を施し、その上に酸化チタン顔料を
添加したエポキシ系樹脂の下塗り塗料を乾燥塗膜厚で１
０μｍになるように塗装して、２１５℃（最高到達板
温）で４０秒間焼き付け乾燥した。そして、引き続い
て、球状ガラスビ−ズを添加したポリエステル系樹脂の
上塗り塗料を乾燥塗膜厚で２０μｍになるように塗装し
て、２３０℃（最高到達板温）で５０秒間焼き付け乾燥
した。次に、このようにして得られた塗装鋼板の塗膜鉛
筆硬度、洗浄回復性および耐候性を次の要領で調査し
た。この結果を表１に示す。[Example] Chromate treatment (amount of chromium deposited: 20 mg / m 2 ) was applied to a stainless steel plate, and an epoxy resin undercoating containing a titanium oxide pigment was applied to the undercoating to give a dry film thickness of 1
It was coated so as to have a thickness of 0 μm, and baked and dried at 215 ° C. (maximum plate temperature reached) for 40 seconds. Then, subsequently, a top coat paint of a polyester resin to which spherical glass beads had been added was applied so as to have a dry coating film thickness of 20 μm, and baked and dried at 230 ° C. (maximum reached plate temperature) for 50 seconds. Next, the coating film pencil hardness, washing recoverability, and weather resistance of the coated steel sheet thus obtained were investigated in the following manner. The results are shown in Table 1.
【００１５】（１）鉛筆硬度 ＪＩＳ Ｋ ５４００に準拠した。 （２）洗浄回復性 カ−ボンブラックを油で混練したペ−ストを試験片に塗
布して、６０℃の熱風炉内に７０時間放置した後、ＪＩ
Ｓ Ａ ５４０３に準拠して塗布物を洗浄し、汚染残り
度合いを、汚染の残りがないものを◎、わずかに汚染が
残っているものを○、汚染がはっきり残っているものを
△で評価した。 （３）耐候性 サンシャインウエザ−メ−タ−試験機で１０００時間促
進耐候性試験を行い、わずかに光沢が低下したものを
○、光沢の低下がはっきり認められるものを△で評価し
た。(1) Pencil hardness According to JIS K 5400. (2) Washing recoverability A paste prepared by kneading carbon black with oil was applied to a test piece and left in a hot air oven at 60 ° C. for 70 hours, and then JI.
The coated material was washed in accordance with S A5403, and the degree of residual stain was evaluated as ⊚ for those with no residual stain, as ○ for slight residual stain, and as Δ for slight residual stain. . (3) Weather resistance A 1000 hour accelerated weather resistance test was carried out with a sunshine weather meter tester, and those with a slight decrease in gloss were evaluated as ◯, and those with a clear decrease in gloss were evaluated as Δ.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【発明の効果】以上のように、本発明のトンネル内装用
塗装金属板は、塗膜硬度が高く、洗浄回復性にも優れて
いるので、洗浄機による洗浄にも耐える。また、球状ガ
ラスビ−ズが塗膜より露出しているので、光反射性に優
れ、トンネル内を明るくすることができる。さらに、上
塗り塗膜は球状ガラスビ−ズを添加したポリエステル系
塗料を塗装し、通常のプレコ−ト金属板と同じ焼き付け
乾燥条件で硬化させればよいので、金属板の連続塗装ラ
インで製造でき、生産性に優れている。As described above, the coated metal sheet for tunnel interior of the present invention has a high coating hardness and is excellent in cleaning recovery, and therefore can be washed by a washing machine. Further, since the spherical glass beads are exposed from the coating film, the light reflectivity is excellent and the inside of the tunnel can be brightened. Furthermore, the top coating film may be coated with a polyester-based coating material to which spherical glass beads are added, and may be cured under the same baking and drying conditions as a normal precoat metal plate, so that it can be produced on a continuous coating line for metal plates, It has excellent productivity.
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 Ｅ２１Ｄ 11/14 Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI Technical display area E21D 11/14
Claims (1)
膜を有する塗装金属板において、前記上塗り塗膜の塗膜
厚を１０〜５０μｍにするとともに、塗膜中に平均粒径
５〜７５μｍの球状ガラスビ−ズを２０〜４０ｗｔ％添
加し、塗膜厚Ｔと球状ガラスビ−ズの平均粒径ｒとの関
係が０.５≦ｒ/Ｔ≦１.５にしたことを特徴とするトン
ネル内装用高硬度塗装金属板。1. A coated metal plate having an undercoating film and a polyester-based topcoating film, wherein the topcoating film has a coating film thickness of 10 to 50 μm and a spherical glass plate having an average particle size of 5 to 75 μm. 20 to 40% by weight of the steel particles is added, and the relationship between the coating thickness T and the average particle diameter r of the spherical glass beads is set to 0.5 ≦ r / T ≦ 1.5. Hardness coated metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6075378A JPH07256821A (en) | 1994-03-22 | 1994-03-22 | High hardness painted metal panel for lining turnnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6075378A JPH07256821A (en) | 1994-03-22 | 1994-03-22 | High hardness painted metal panel for lining turnnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07256821A true JPH07256821A (en) | 1995-10-09 |
Family
ID=13574484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6075378A Pending JPH07256821A (en) | 1994-03-22 | 1994-03-22 | High hardness painted metal panel for lining turnnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07256821A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1128419A (en) * | 1997-05-16 | 1999-02-02 | Mitsubishi Electric Corp | Surface treatment member and surface treatment method |
-
1994
- 1994-03-22 JP JP6075378A patent/JPH07256821A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1128419A (en) * | 1997-05-16 | 1999-02-02 | Mitsubishi Electric Corp | Surface treatment member and surface treatment method |
| US6303209B1 (en) | 1997-05-16 | 2001-10-16 | Mitsubishi Denki Kabushiki Kaisha | Electrical apparatus having metal case with thermal insulation |
| US6355332B1 (en) | 1997-05-16 | 2002-03-12 | Mitsubishi Denki Kabushiki Kaisha | Portable electrical apparatus with metal case having thermal insulation |
| US6358595B1 (en) | 1997-05-16 | 2002-03-19 | Mitsubishi Denki Kabushiki Kaisha | Portable electrical apparatus with metal case having thermal insulation |
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