JP3195638B2 - Painted steel sheet with excellent formability - Google Patents
Painted steel sheet with excellent formabilityInfo
- Publication number
- JP3195638B2 JP3195638B2 JP06945292A JP6945292A JP3195638B2 JP 3195638 B2 JP3195638 B2 JP 3195638B2 JP 06945292 A JP06945292 A JP 06945292A JP 6945292 A JP6945292 A JP 6945292A JP 3195638 B2 JP3195638 B2 JP 3195638B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- steel sheet
- powder
- coated steel
- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 25
- 239000010959 steel Substances 0.000 title claims description 25
- 239000011248 coating agent Substances 0.000 claims description 41
- 238000000576 coating method Methods 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 14
- 238000005452 bending Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
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、塗膜に表面粗度を付与
することにより成形加工の際の塗膜耐傷付き性、耐塗膜
剥離性を改善した塗装鋼板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated steel sheet in which the coating film is provided with surface roughness to improve the coating film scratch resistance and coating film peeling resistance during molding.
【００２】[0092]
【従来技術】近年、家電製品、音響機器、鋼製家具など
の分野では、冷延鋼板やめっき鋼板を成形加工した後、
塗装して部材を製造する方法に代えて、塗装鋼板を直接
成形加工して、製造する方法が採用されている。この製
造方法では、成形加工の際塗装鋼板の塗膜がしごかれる
ので、塗装鋼板としては、塗膜の耐傷付き性、耐塗膜剥
離性に優れたものを要求される。2. Description of the Related Art In recent years, in the fields of home electric appliances, audio equipment, steel furniture, etc., after forming a cold-rolled steel sheet or a plated steel sheet,
Instead of a method of manufacturing a member by painting, a method of manufacturing by directly forming a coated steel plate is adopted. In this manufacturing method, the coating film of the coated steel sheet is wrung out during the forming process, so that the coated steel sheet is required to have excellent scratch resistance and coating film peeling resistance.
【００３】塗膜の耐傷付き性、耐塗膜剥離性を改善する
方法としては、（１）塗膜硬度を高くする方法、（２）
塗膜表面に保護フィルムを貼付ける方法、（３）塗膜中
または塗膜表面に有機系ワックスを添加もしくは塗布す
る方法がある。Methods for improving the scratch resistance and peeling resistance of the coating film include (1) a method of increasing the hardness of the coating film, and (2) a method of increasing the hardness of the coating film.
There are a method of attaching a protective film to the surface of the coating film and (3) a method of adding or applying an organic wax in or on the coating film.
【００４】[0093]
【発明が解決しようとする課題】しかしながら、（１）
の方法の場合、塗膜硬度を樹脂組成的に高くして、耐傷
付き性を改善すると、塗膜加工性が低下し、逆に塗膜硬
度を樹脂組成的に低くすると、耐塗膜剥離性が劣化して
しまう。このため、両者を最高の状態にするのが極めて
困難であった。However, (1)
In the case of the method, when the coating film hardness is increased in terms of the resin composition and the scratch resistance is improved, the coating film processability is reduced. Conversely, when the coating film hardness is reduced in the resin composition, the coating film peeling resistance is reduced. Deteriorates. For this reason, it was extremely difficult to bring both into the best state.
【００５】また、（２）の方法の場合は、保護フィルム
の貼付けやそれを用いることによる塗装鋼板のコストア
ップのほかに、成形加工後保護フィルムを剥離しなけれ
ばならず、しかも、剥離の際保護フィルムが破れたり、
経時的に接着力が上昇して容易に剥離しなくなったりし
て、成形加工後の作業が繁雑になるものであった。さら
に、（３）の方法の場合は、成形加工後ワックスを洗浄
除去して乾燥しなければならないため、やはり成形加工
の作業が繁雑になるものであった。In the case of the method (2), in addition to attaching the protective film and increasing the cost of the coated steel sheet by using the protective film, the protective film must be peeled off after the forming process. When the protective film is torn,
The adhesive force increases with time, so that it does not easily peel off, and the work after the molding process becomes complicated. Furthermore, in the case of the method (3), since the wax must be washed and removed after the forming process and dried, the forming process also becomes complicated.
【００６】[0086]
【課題を解決するための手段】本発明は、上記のような
欠点のない塗装鋼板を提供するもので、塗膜中に平均粒
径が塗膜厚の１／２倍で、最大粒径のものが塗膜厚の２
倍以下であるシリカ粉末、ポリテトラフルオロエチレン
粉末、マイカ粉末から選んだ１種または２種以上の粉末
骨材を分散させた。SUMMARY OF THE INVENTION The present invention provides a coated steel sheet which does not have the above-mentioned drawbacks. Thing is coating thickness 2
Silica powder, polytetrafluoroethylene which is less than double
One or more kinds of powder aggregates selected from powder and mica powder were dispersed.
【００７】007
【作用】本発明の塗装鋼板は、粉末骨材の平均粒径が塗
膜厚の１／２倍で、最大粒径が塗膜厚の２倍以下である
と、塗膜表面より突出する粒子が多いので、成形加工の
際のポンチやロ−ルなどはこの凸部にだけ作用し、塗膜
の凹部には接触しない。このため、塗膜の凹部は保護さ
れ、傷が付かない。しかし、塗膜の凸部には傷が付く
が、この傷は非常に細かいものが表面全体に分散したも
のであるため、外観的に目立たず、見かけ傷がないよう
に見えるのである。According to the coated steel sheet of the present invention, if the average particle diameter of the powder aggregate is 1/2 times the coating film thickness and the maximum particle diameter is not more than twice the coating film thickness, the particles projecting from the coating film surface Therefore, punches and rolls at the time of molding work only on these convex portions and do not come into contact with the concave portions of the coating film. Therefore, the concave portion of the coating film is protected and is not scratched. However, the projections of the coating film are scratched, but since these scratches are very fine ones dispersed over the entire surface, they are inconspicuous in appearance and appear to have no apparent scratches.
【００８】塗膜中に分散させる粉末骨材を平均粒径が塗
膜厚の１／２倍で、最大粒径のものが塗膜厚の２倍以下
にしたのは、表面粗度をある程度大きくして、塗膜凸部
に生ずる傷の比率を少なくして、外観上傷が目立たない
ようにするためである。平均粒径、最大粒径のものがこ
れらの値未満であると、表面粗度が小さくなるため、見
かけ上の傷付き防止効果はなく、逆にその値を超える
と、塗膜の連続性が失われ、耐食性が低下する。The reason why the average particle size of the powder aggregate dispersed in the coating film was 1/2 times the coating film thickness and the maximum particle size was less than twice the coating film thickness was that the surface roughness was increased to some extent. This is for increasing the size and reducing the ratio of scratches generated on the convex portions of the coating film so that the scratches are not conspicuous in appearance. If the average particle size and the maximum particle size are less than these values, the surface roughness becomes small, so there is no apparent scratch prevention effect, and if it exceeds the value, the continuity of the coating film is reduced. Loss and reduced corrosion resistance.
【００９】粉末骨材としては、塗料に分散しやすく、比
較的安価で、金型を傷付けることがなく、また、塗膜性
能に悪影響を及ぼさないことなどから、シリカ粉末、ポ
リテトラフルオロエチレン粉末、マイカ粉末から選んだ
１種または２種以上を使用する。この粉末骨材の添加量
は、塗膜の１〜１５重量％にするのが好ましい。１重量
％未満であると、成形加工の際、ポンチやロ−ルなど受
ける凸部が少ないため、押し潰され、凹部にも傷が付い
てしまう。一方、１５重量％を越えると、塗膜の加工性
が低下し、割れが発生する。As a powder aggregate, it is easy to disperse in paint,
Relatively inexpensive, does not damage the mold, and has good coating properties
Silica powder, polish , etc.
Selected from Litetrafluoroethylene powder and Mica powder
One or more kinds are used . The amount of the powder aggregate is preferably 1 to 15% by weight of the coating film. If the amount is less than 1% by weight, since there are few convex portions such as punches and rolls during molding, they are crushed and the concave portions are also damaged. On the other hand, if it exceeds 15% by weight, the workability of the coating film is reduced, and cracks occur.
【０１０】[0102]
【実施例】板厚０.８ｍｍの溶融亜鉛めっき鋼板に下記
塗膜を形成したものを試験材に用いて成形加工試験を実
施した。表１にこれらの塗装鋼板の塗膜物性を示す。 （１）本発明１塗装鋼板 平均粒径１０μｍ、最大粒径のもの３５μｍの結晶質シ
リカ粉末を１０重量％添加して、分散させたポリエステ
ル系塗膜を２０μｍ形成したもの。（２）本発明２塗装鋼板 平均粒径１０μｍ、最大粒径のもの３５μｍのポリテト
ラフルオロエチレン粉末を１０重量％添加して、分散さ
せたポリエステル系塗膜を２０μｍ形成したもの。 （３）本発明３塗装鋼板 平均粒径１０μｍ、最大粒径のもの３５μｍのマイカ粉
末を１０重量％添加して、分散させたポリエステル系塗
膜を２０μｍ形成したもの。 （４） 比較例１塗装鋼板 前記本発明塗装鋼板に使用したポリエステル系塗膜を粉
末骨材を添加せずに２０μｍ形成したもの。（５） 比較例２塗装鋼板 塗膜硬度を樹脂組成的に高くしたポリエステル系塗膜を
２０μｍ形成したもの。EXAMPLE A forming test was carried out by using a hot-dip galvanized steel sheet having a thickness of 0.8 mm on which the following coating film was formed as a test material. Table 1 shows the coating film properties of these coated steel sheets. (1) Present invention 1 coated steel sheet A coated steel sheet formed by adding 10% by weight of crystalline silica powder having an average particle diameter of 10 μm and a maximum particle diameter of 35 μm and dispersing it to 20 μm. (2) Invention 2 Polyteto having a coated steel sheet having an average particle diameter of 10 μm and a maximum particle diameter of 35 μm.
10% by weight of lafluoroethylene powder was added and dispersed.
A 20 μm-thick coated polyester film. (3) Mica powder of the present invention 3 coated steel sheet having an average particle diameter of 10 μm and a maximum particle diameter of 35 μm
10% by weight of powder and dispersed in a polyester coating
A film with a thickness of 20 μm. (4) Comparative Example 1 Painted steel plate The polyester coating film used for the coated steel plate of the present invention was formed to 20 μm without adding powder aggregate. (5) Comparative Example 2 Painted steel plate A polyester coating film having a coating film hardness of 20 μm with a high resin composition.
【０１１】[0111]
【表１】 （注）塗膜密着性での０ｔは１８０度密着折り曲げを、
１ｔおよび２ｔは同板厚の鋼板を内側に挟んで１８０度
密着折り曲げをしたもので、○印は塗膜割れなし、×印
は塗膜割れ発生を意味している。[Table 1] (Note) 0t in the coating film adhesion is 180 degree close contact bending,
1t and 2t are obtained by bending the steel plate having the same thickness inward by 180 ° with the steel plate being sandwiched between the insides.
【０１２】これらの塗装鋼板より幅４０ｍｍ、長さ１０
０ｍｍの寸法の試験片を調製して、図１および図２に示
す端曲げフランジ加工装置で成形加工試験を実施した。
この装置は、図１に示すように、下側のダイスホルダ−
１およびダイス２と上側の板押さえ３とで塗膜側を上に
した試験片４を水平に、しかも、塗膜剥離試験部分がポ
ンチ５側に突出するように保持して、ポンチ５でその突
出したフランジ部分を図２のように折り曲げるようにな
っている。[0122] These coated steel plates were 40 mm wide and 10 mm long.
A test piece having a size of 0 mm was prepared, and a forming test was performed using the end bending flange forming apparatus shown in FIGS. 1 and 2.
As shown in FIG. 1, this device has a lower die holder.
The test piece 4 with the coating side facing upward is held by the die 1 and the die 2 and the upper plate retainer 3 horizontally, and the coating film peeling test portion is protruded to the punch 5 side. The protruding flange portion is bent as shown in FIG.
【０１３】なお、ダイス２とポンチ５の間隔Ｄ、ポンチ
５の肩半径Ｒ1は変更できるようになっている。試験に
際しては、ダイス２とポンチ５の間隔Ｄを０.８ｍｍ、
ダイス２の肩半径Ｒ2は０ｍｍに設定して、試験片４の
ポンチ５側に突出するフランジ長さＬ、ポンチ５の肩半
径Ｒ1を種々変更した。表２にこの結果を示す。The distance D between the die 2 and the punch 5 and the shoulder radius R 1 of the punch 5 can be changed. In the test, the distance D between the die 2 and the punch 5 was 0.8 mm,
Shoulder radius R 2 of the die 2 is set to 0 mm, flange length protruding punch 5 side of the test piece 4 L, a shoulder radius R 1 of the punch 5 with various modifications. Table 2 shows the results.
【０１４】[0141]
【表２】 [Table 2]
【０１５】[0151]
【発明の効果】以上のように、本発明の塗装鋼板は、成
形加工性が優れているので、そのまま加工するだけでよ
い。As described above, the coated steel sheet of the present invention has excellent formability, so that it is only necessary to process it as it is.
【図１】実施例で塗装鋼板の成形加工試験に使用した端
曲げフランジ加工装置で、試験片を曲げ加工する前の状
態を示している。FIG. 1 shows a state before a test piece is bent by an edge bending flange processing apparatus used in a forming test of a coated steel sheet in Examples.
【図２】実施例で塗装鋼板の成形加工試験に使用した端
曲げフランジ加工装置で、試験片を曲げ加工した後の状
態を示している。FIG. 2 shows a state after a test piece is bent by an end bending flange processing apparatus used in a forming test of a coated steel sheet in Examples.
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B05D 7/14 B05D 7/24 303 B32B 15/08 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) B05D 7/14 B05D 7/24 303 B32B 15/08
Claims (1)
で、最大粒径のものが塗膜厚の２倍以下であるシリカ粉
末、ポリテトラフルオロエチレン粉末、マイカ粉末から
選んだ１種または２種以上の粉末骨材を分散させたこと
を特徴とする成形加工性に優れた塗装鋼板。1. A silica powder having an average particle size in the coating film of 1/2 times the thickness of the coating film and a maximum particle size of 2 times or less the thickness of the coating film.
Powder, from polytetrafluoroethylene powder, mica powder
A coated steel sheet excellent in formability characterized by dispersing one or more selected powder aggregates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06945292A JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06945292A JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05228433A JPH05228433A (en) | 1993-09-07 |
| JP3195638B2 true JP3195638B2 (en) | 2001-08-06 |
Family
ID=13403054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06945292A Expired - Fee Related JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3195638B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8695967B2 (en) | 2011-11-07 | 2014-04-15 | Ricoh Company, Ltd. | Sheet feeder and image forming apparatus including same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5572269B1 (en) * | 2014-03-24 | 2014-08-13 | 日新製鋼株式会社 | Painted metal plate and exterior building materials |
| JP5572270B1 (en) | 2014-03-24 | 2014-08-13 | 日新製鋼株式会社 | Painted metal plate and exterior building materials |
-
1992
- 1992-02-19 JP JP06945292A patent/JP3195638B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8695967B2 (en) | 2011-11-07 | 2014-04-15 | Ricoh Company, Ltd. | Sheet feeder and image forming apparatus including same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05228433A (en) | 1993-09-07 |
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