JP2806706B2 - Composite steel sheet with synthetic resin interlayer - Google Patents
Composite steel sheet with synthetic resin interlayerInfo
- Publication number
- JP2806706B2 JP2806706B2 JP4219066A JP21906692A JP2806706B2 JP 2806706 B2 JP2806706 B2 JP 2806706B2 JP 4219066 A JP4219066 A JP 4219066A JP 21906692 A JP21906692 A JP 21906692A JP 2806706 B2 JP2806706 B2 JP 2806706B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- synthetic resin
- hot
- dip galvanized
- intermediate layer
- 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 - Lifetime
Links
Landscapes
- Laminated Bodies (AREA)
- Chemical Treatment Of Metals (AREA)
- Coating With Molten Metal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合成樹脂中間層と溶融
亜鉛系めっき鋼板とを強固に積層一体化した耐剥離性に
優れた合成樹脂中間層を有する複合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 composite steel sheet having a synthetic resin intermediate layer having excellent peeling resistance, in which a synthetic resin intermediate layer and a hot-dip galvanized steel sheet are firmly laminated and integrated.
【０００２】[0002]
【従来の技術】合成樹脂中間層と溶融亜鉛系めっき鋼板
とを積層一体化した合成樹脂中間層を有する複合鋼板
は、たとえば振動抑制に効果があり機械的強度にも優れ
ているため自動車、家電、建材等の用途に多くの需要が
あり、このため様々な使用環境あるいは使用状態に対応
できるように耐食性、制振性、成形加工性等の諸特性を
高めたものが種々開発され提案されている（例えば、特
公平２−２７１４５号公報、特公平２−６０５１０号公
報参照）。ところで、屋根、壁等に使用されるカラー鋼
板は使用環境が厳しいため、従来から溶融亜鉛めっき鋼
板が使われており、合成樹脂中間層を有する複合鋼板に
おいても、前記したような耐食性、制振性等の諸特性を
満足する必要がある。しかし、溶融亜鉛系めっき鋼板と
合成樹脂中間層との密着性が劣り長期間使用していると
両者が剥離するという問題点があった。2. Description of the Related Art Composite steel sheets having a synthetic resin intermediate layer in which a synthetic resin intermediate layer and a hot-dip galvanized steel sheet are laminated and integrated, for example, are effective in suppressing vibration and have excellent mechanical strength, so that they are used in automobiles and home appliances. There are many demands for applications such as building materials, and for this reason, various types of materials having enhanced properties such as corrosion resistance, vibration damping properties, moldability, etc. have been developed and proposed to be able to cope with various use environments or use conditions. (For example, see Japanese Patent Publication No. 2-27145 and Japanese Patent Publication No. 2-60510). By the way, the color steel sheet used for roofs, walls, etc. has been used in severe environments, so hot-dip galvanized steel sheet has been conventionally used, and even in the case of composite steel sheet having a synthetic resin intermediate layer, the corrosion resistance and vibration suppression It is necessary to satisfy various properties such as properties. However, there has been a problem that the adhesion between the hot-dip galvanized steel sheet and the synthetic resin intermediate layer is inferior, and when used for a long period of time, they peel off.
【０００３】[0003]
【発明が解決しようとする課題】本発明は前記のような
剥離現象が特にＰb を添加した溶融亜鉛系めっき鋼板を
用いた場合に顕著であることに着目して研究をすすめて
きた結果、従来のこの種合成樹脂中間層を有する複合鋼
板が高温、多湿環境下で時間の経過とともに密着性が劣
化する原因は、合成樹脂中間層の吸湿に伴い水分が溶融
亜鉛系めっき層の結晶粒界を通して内部へ入り込み、こ
の溶融亜鉛系めっき層を形成している亜鉛と該めっき層
中に含有されているＰb との間で腐食が生じて腐食生成
物が前記の合成樹脂中間層を押し上げたり、前記の腐食
によって発生したガスが合成樹脂中間層内へ侵入し、合
成樹脂中間層の接着力を著しく低下させることをつきと
め、この結果、溶融亜鉛系めっき鋼板と合成樹脂中間層
との密着性の低下を、溶融亜鉛系めっき鋼板のめっき層
で起こる局部的な腐食による腐食生成物やガスの発生を
極力防止することにより解決し、長期間使用しても溶融
亜鉛系めっき鋼板と合成樹脂中間層との密着性が低下す
ることのない優れた耐剥離性を維持できる合成樹脂中間
層を有する複合鋼板を提供しようとすることにある。The present invention focuses on the fact that the above-mentioned peeling phenomenon is particularly remarkable when using a hot-dip galvanized steel sheet to which Pb is added. The cause of the deterioration of adhesion with time in a high-temperature, high-humidity environment of a composite steel sheet having a synthetic resin intermediate layer of this kind is that moisture is passed through the crystal grain boundaries of the hot-dip galvanized plating layer due to moisture absorption of the synthetic resin intermediate layer. Corrosion occurs between the zinc forming the hot-dip zinc-based plating layer and Pb contained in the plating layer, and corrosion products push up the synthetic resin intermediate layer, Gas generated by the corrosion of the steel enters the synthetic resin intermediate layer and significantly reduces the adhesive strength of the synthetic resin intermediate layer. As a result, the adhesion between the hot-dip galvanized steel sheet and the synthetic resin intermediate layer is reduced. To The problem is solved by minimizing the generation of corrosion products and gases due to local corrosion that occurs in the coating layer of the hot-dip galvanized steel sheet. An object of the present invention is to provide a composite steel sheet having a synthetic resin intermediate layer capable of maintaining excellent peel resistance without lowering the adhesion.
【０００４】[0004]
【課題を解決するための手段】前記のような課題を解決
するためになされた本発明に係る合成樹脂中間層を有す
る複合鋼板は、表面に溶融亜鉛系めっき鋼板が積層一体
化された合成樹脂中間層を有する複合鋼板において、前
記溶融亜鉛系めっき鋼板のめっき層中に含まれるＰb 含
有量を０．００５〜０．０５％として、合成樹脂中間層
と溶融亜鉛系めっき鋼板のめっき層との境界でめっき層
中の亜鉛とＰb により局部的な腐食が生じて腐食生成物
やガスにより樹脂中間部から剥離することをなくし、溶
融亜鉛系めっき鋼板と合成樹脂中間層との安定的な長期
密着性を維持できるようにしたことを特徴とするもので
ある。Means for Solving the Problems A composite steel sheet having a synthetic resin intermediate layer according to the present invention, which has been made to solve the above-mentioned problems, has a synthetic resin in which a hot-dip galvanized steel sheet is laminated and integrated on the surface. in the composite steel sheet having an intermediate layer, a Pb content in the plating layer of the molten zinc plated steel sheet as a 0.005 to 0.05%, the synthetic resin intermediate layer
Layer at the boundary between the coating layer and the hot-dip galvanized steel sheet
Local corrosion caused by zinc and Pb in the corrosion products
To prevent peeling from the resin intermediate part due to
Stable long-term between hot-dip galvanized steel sheet and synthetic resin interlayer
It is characterized in that the adhesiveness can be maintained .
【０００５】前記したように溶融亜鉛系めっき鋼板と合
成樹脂中間層との間における耐剥離性の低下は、溶融亜
鉛系のめっき層中に含有されたＰb が何らかの影響を与
えているものであることをつきとめた結果、本発明が完
成されたものである。As described above, the decrease in the peeling resistance between the hot-dip galvanized steel sheet and the synthetic resin interlayer is caused by Pb contained in the hot-dip galvanized steel sheet. As a result, the present invention has been completed.
【０００６】すなわち、溶融亜鉛系のめっき層中に含ま
れるＰb 含有量は０．０８％〜０．１５％程度とするの
が一般的とされているが、本発明においてはＰb の含有
量を０．００５〜０．０５％とすることにより合成樹脂
中間層が吸湿して水分が溶融亜鉛系のめっき層内に入り
込んだとしても、このめっき層内における亜鉛と鉛によ
り局部的な腐食作用が発生することを極力なくし、これ
により腐食生成物の発生による合成樹脂中間層の押し上
げ現象や、腐食によるガスの発生もなくして合成樹脂中
間層内へのガスの侵入現象をなくし、溶融亜鉛系めっき
鋼板と合成樹脂中間層とが樹脂中間部で剥離することな
く強固な密着を長期間にわたって維持できるものとして
いる。なお、溶融亜鉛系のめっき層中のＰb 含有量が
０．０５％を超える場合には前記した理由により十分な
耐剥離性を維持することが困難となり、Ｐb 含有量の下
限値は０．００５％であることがメッキ層中にＰb が含
有されている溶融亜鉛系めっき鋼板のもつ諸特性を損な
わないようにするために必要である。That is, it is generally considered that the Pb content contained in a hot-dip zinc-based plating layer is about 0.08% to 0.15%. However, in the present invention, the Pb content is reduced. Even if the synthetic resin intermediate layer absorbs moisture and water enters the hot-dip galvanized plating layer by setting the content to 0.005 to 0.05%, the local corrosion action is caused by zinc and lead in this plating layer. This minimizes the generation of corrosion products, thereby eliminating the phenomenon of pushing up the synthetic resin intermediate layer due to the generation of corrosion products and the gas intrusion into the synthetic resin intermediate layer without generating gas due to corrosion. The steel sheet and the synthetic resin interlayer should not be separated at the resin intermediate part.
The firm and strong adhesion can be maintained for a long period of time. If the Pb content in the hot-dip zinc-based plating layer exceeds 0.05%, it becomes difficult to maintain sufficient peeling resistance for the above-mentioned reasons, and the lower limit of the Pb content is 0.005%. % Is necessary in order not to impair various properties of the hot-dip galvanized steel sheet containing Pb in the plating layer.
【０００７】本発明において表層を形成している溶融亜
鉛系のめっき層は、亜鉛または主成分を亜鉛としその他
マンガンやアルミニウム等の耐食性を向上させる元素等
を若干含有したものをいい、例えば、０．２〜０．８mm
厚の鋼板に対してめっき付着量が３０〜１５０g/m2とな
るよう処理される。なお、前記溶融亜鉛系めっき鋼板の
樹脂接触面にリン酸処理やクロメート処理を施すことに
より耐食性がより向上することは勿論である。In the present invention, the hot-dip galvanized layer forming the surface layer refers to a layer containing zinc or a main component of zinc and containing a small amount of an element such as manganese or aluminum which improves the corrosion resistance. 0.2-0.8mm
Thick steel plate is treated so as to have a coating weight of 30 to 150 g / m 2 . In addition, it is a matter of course that the corrosion resistance is further improved by performing a phosphoric acid treatment or a chromate treatment on the resin contact surface of the galvanized steel sheet.
【０００８】また、本発明における合成樹脂中間層に用
いる合成樹脂としては、成形性、耐熱性の点を考慮して
例えばポリオレフィン系合成樹脂や、ポリアミド系合成
樹脂、ポリエステル系合成樹脂等の通常この種合成樹脂
中間層を有する複合鋼板に使用される熱可塑性および熱
硬化性の高分子材料の全てが使用できる。また、この合
成樹脂中間層の厚みは、例えば３０〜１００μ程度とな
るよう調整され、溶融亜鉛系めっき鋼板間にこのような
合成樹脂中間層を形成するには、塗料型の樹脂を鋼板に
塗布し溶剤を除去したのちプレス成形機などにより加熱
下で圧着するか、合成樹脂中間層を溶融押出機から溶融
亜鉛系めっき鋼板間に供給してロールにより圧着する等
の周知の方法の全てが適用できる。The synthetic resin used for the synthetic resin intermediate layer in the present invention is usually made of polyolefin-based synthetic resin, polyamide-based synthetic resin, polyester-based synthetic resin or the like in consideration of moldability and heat resistance. All thermoplastic and thermosetting polymeric materials used in composite steel sheets having a seed synthetic resin interlayer can be used. The thickness of the synthetic resin intermediate layer is adjusted, for example, to about 30 to 100 μm. To form such a synthetic resin intermediate layer between hot-dip galvanized steel sheets, a paint-type resin is applied to the steel sheet. All the well-known methods, such as removing the solvent and then pressing under pressure with a press molding machine or the like, or applying a synthetic resin intermediate layer from a hot extruder between hot-dip galvanized steel sheets and pressing with a roll, etc. are applied. it can.
【０００９】[0009]
【実施例】次に、本発明の実施例について説明する。
０．６mm厚の冷延鋼板に、Ｚｎを主成分としてこれにＡ
ｌ０．３２％、０．４５％のＦｅとともにＰｂを０．０
０５〜０．１５％の範囲で量を種々変化させて添加し、
めっき付着量が１００g/m2となるよう常法により溶融め
っき処理を施して溶融亜鉛系のめっき層が表面に形成さ
れた溶融亜鉛系めっき鋼板を得た。次に、このようにし
て得られた溶融亜鉛系めっき鋼板表面にクロメート処理
を施し、その板間に厚み４０μのポリエステル系の合成
樹脂中間層を介在させてプレス成形機による加熱下で圧
着し、これらを積層一体化して合成樹脂中間層を有する
複合鋼板を製造した。このようにして得られた合成樹脂
中間層を有する複合鋼板について、製造初期状態および
４８０時間経過後のＴピール強度と、４８０時間経過後
における剥離状況を測定した結果は表１に示されるとお
りである。表１によれば溶融亜鉛めっき層中のＰｂ含有
量を０．００５〜０．０５％としたものは、比較例とし
て示した溶融亜鉛系のめっき層中のＰｂ含有量が０．０
５％を越えるものに比べて優れた耐剥離性が確認でき
た。Next, an embodiment of the present invention will be described.
A 0.6 mm thick cold rolled steel sheet containing Zn as a main component
0.10 Pb with 0.32% and 0.45% Fe
Added in various amounts ranging from 0.05 to 0.15%,
Amount plating adhesion was obtained hot-dip galvanized steel sheet plated layer is formed on the surface of the molten zinc is subjected to melt-plating in a conventional manner so as to be 100 g / m 2. Next, the surface of the hot-dip galvanized steel sheet thus obtained is subjected to a chromate treatment, and a 40 μm-thick polyester synthetic resin intermediate layer is interposed between the sheets and pressed under heating by a press forming machine, These were laminated and integrated to produce a composite steel sheet having a synthetic resin intermediate layer. With respect to the composite steel sheet having the synthetic resin intermediate layer obtained in this way, the results of measuring the initial peeling state, the T-peel strength after 480 hours, and the peeling state after 480 hours are shown in Table 1. is there. According to Table 1, when the Pb content in the hot-dip galvanized layer was 0.005 to 0.05%, the Pb content in the hot-dip galvanized plating layer shown as a comparative example was 0.0%.
Excellent peeling resistance was confirmed as compared with those exceeding 5%.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【発明の効果】以上の説明からも明らかなように、本発
明は溶融亜鉛系のめっき層中において亜鉛と鉛との局部
的な腐食を極力防止し、長期間使用しても溶融亜鉛系め
っき鋼板と合成樹脂中間層との密着性が低下することを
なくして長期間にわたり優れた耐剥離性を維持すること
ができるものであり、また、耐剥離性が高められること
により加工性もより優れたものとなるので深絞り加工な
どの複雑な加工であっても所定寸法どうりに精度よく加
工することができるという利点もある。従って、本発明
は従来のこの種合成樹脂中間層を有する複合鋼板の問題
点を一掃したものとして、産業の発展に寄与するところ
は極めて大である。As is clear from the above description, the present invention minimizes the local corrosion of zinc and lead in a hot-dip galvanized coating layer and prevents the hot-dip galvanized plating even after long-term use. It is possible to maintain excellent peel resistance for a long period of time without reducing the adhesion between the steel sheet and the synthetic resin intermediate layer, and also to improve the workability by improving the peel resistance. Therefore, there is an advantage that even a complicated process such as a deep drawing process can be accurately processed to a predetermined size. Therefore, the present invention, which has solved the problems of the conventional composite steel sheet having a synthetic resin intermediate layer, greatly contributes to industrial development.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−158242（ＪＰ，Ａ) 特開 平２−267281（ＪＰ，Ａ) 特開 平３−253550（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-158242 (JP, A) JP-A-2-267281 (JP, A) JP-A-3-253550 (JP, A)
Claims (1)
化された合成樹脂中間層を有する複合鋼板において、前
記溶融亜鉛系めっき鋼板のめっき層中に含まれるＰb 含
有量を０．００５〜０．０５％として、合成樹脂中間層
と溶融亜鉛系めっき鋼板のめっき層との境界でめっき層
中の亜鉛とＰb により局部的な腐食が生じて腐食生成物
やガスにより樹脂中間部から剥離することをなくし、溶
融亜鉛系めっき鋼板と合成樹脂中間層との安定的な長期
密着性を維持できるようにしたことを特徴とする合成樹
脂中間層を有する複合鋼板。1. A composite steel sheet having a synthetic resin intermediate layer on the surface of which a hot-dip galvanized steel sheet is laminated and integrated, wherein the Pb content contained in the plating layer of the hot-dip galvanized steel sheet is 0.005 to 0. as a .05%, synthetic resin intermediate layer
Layer at the boundary between the coating layer and the hot-dip galvanized steel sheet
Local corrosion caused by zinc and Pb in the corrosion products
To prevent peeling from the resin intermediate part due to
Stable long-term between hot-dip galvanized steel sheet and synthetic resin interlayer
A composite steel sheet having a synthetic resin intermediate layer, characterized in that adhesion can be maintained .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219066A JP2806706B2 (en) | 1992-08-18 | 1992-08-18 | Composite steel sheet with synthetic resin interlayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219066A JP2806706B2 (en) | 1992-08-18 | 1992-08-18 | Composite steel sheet with synthetic resin interlayer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0664087A JPH0664087A (en) | 1994-03-08 |
| JP2806706B2 true JP2806706B2 (en) | 1998-09-30 |
Family
ID=16729740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4219066A Expired - Lifetime JP2806706B2 (en) | 1992-08-18 | 1992-08-18 | Composite steel sheet with synthetic resin interlayer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2806706B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6946031B2 (en) | 2002-02-08 | 2005-09-20 | Fuji Photo Film Co., Ltd. | Rod for a coating device, and process for producing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63158242A (en) * | 1986-08-25 | 1988-07-01 | 新日本製鐵株式会社 | Vibration-damping steel plate having excellent weldability |
| JPH02267281A (en) * | 1989-04-07 | 1990-11-01 | Sumitomo Metal Ind Ltd | Hot dip galvanized steel sheet having superior white rust resistance and blackening resistance and production thereof |
| JPH03253550A (en) * | 1990-01-16 | 1991-11-12 | Nippon Steel Corp | Production of alloyed hot dip galvanized steel sheet having superior spot weldability and hot dip galvanizing bath |
-
1992
- 1992-08-18 JP JP4219066A patent/JP2806706B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0664087A (en) | 1994-03-08 |
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