JPH10119178A - Manufacture of resin-coated metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously laminate resin having a print pattern on a strip-like metal plate with satisfactory dimensional accuracy by transferring a resin layer to the plate while continuously bringing a striplike carrier obtained by laminating the resin layer into close contact with one surface at least on one surface of heated striplike metal plate. SOLUTION: A striplike metal plate 20 rewound from a metal plate rewinding means Rc is heated by a heating means 2. Meanwhile, a striplike resin laminate carrier 21 formed of a carrier 25 and resin layer 22 is rewound from a carrier rewinding means 3. A resin layer 22 is brought into contact with the heated plate 20 via a deflector roll 5, sandwiched between laminate rolls 4, and laminated. This plate 20 is fed to a separating roll 8 to separate only the carrier 25, and wound by a carrier winding means 9, and the resin-coated metal plate laminates only with the separated layer 22 is wound by a winding means 10. As a result, the optimum resin layer is laminated with satisfactory dimensional accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a resin-coated metal sheet. More specifically, the carrier with the resin layer laminated on the surface, after the resin layer is pressed against the band-shaped metal plate, the resin layer is peeled off from the carrier and removed to transfer and coat the resin on the surface of the band-shaped metal plate. And a method for producing a resin-coated metal plate.

[0002]

2. Description of the Related Art In recent years, in the field of beverage cans and the like, a method of laminating a resin film such as polyester on a metal plate has been implemented as a method of manufacturing a metal plate to be used. 2. Description of the Related Art Conventionally, a method of laminating a thermoplastic resin sheet on a steel sheet and forming a pattern by transfer using heat applied at the same time in order to apply a pattern or the like to the surface of the steel sheet (Japanese Patent Laid-Open No. No. 45187). This is because if the thermoplastic resin sheet with the printed pattern is directly laminated on the steel sheet, the thermoplastic resin sheet expands and contracts due to the heat applied during lamination, and the pattern on the surface is distorted. After a thermoplastic resin sheet is laminated on the thermoplastic resin sheet to absorb expansion and contraction caused by heating, a pattern is thermally transferred on the thermoplastic resin sheet without causing distortion. Further, as a method of forming a printing layer on the can body of a two-piece can, a metal plate on which a plastic sheet is laminated is formed into a two-piece can, and then, on the surface of the plastic sheet, an isolation layer, a display part layer, A method is disclosed in which a transfer sheet provided with an adhesive layer is closely contacted, heated, and then the substrate is peeled off to provide a display portion such as a picture on a can body (Japanese Patent Application Laid-Open No. 6-99235). In each of these methods, as a resin layer directly in contact with a metal plate, a thermoplastic resin sheet or a plastic sheet is preliminarily laminated on a metal plate, and a thermoplastic resin sheet or a plastic sheet on which patterns, display portions, and the like are laminated. Heat transfer is performed on the top.

[0003] However, these conventional methods of directly laminating a resin film on a metal plate require more laminating equipment than laminating a resin film directly on paper or other resin films because the metal plate is long and heavy. Become massive. In particular, it is difficult to prevent wrinkles from occurring when laminating a thin resin film on a metal plate, and to finely control lamination conditions when laminating resin films having a fixed print pattern continuously with good dimensional accuracy.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a technical problem to be solved is to use a simple laminating equipment to form a resin having a predetermined printing pattern on a strip-shaped metal plate. Are continuously laminated with good dimensional accuracy. In other words, a carrier laminated on one side of a carrier made of a light material is prepared in advance, and the carrier laminated with the resin is heated and pressed against a strip-shaped metal plate, and only the carrier is peeled off to be optimal for the intended use. It is an object of the present invention to provide a method of manufacturing a resin-coated metal plate capable of directly laminating a simple resin layer on a metal plate under easy laminating conditions and with good dimensional accuracy.

[0005]

According to a first aspect of the present invention, there is provided a method of manufacturing a resin-coated metal plate, comprising the steps of (a) manufacturing a band-shaped carrier having a resin layer laminated on one surface of the band-shaped carrier; Transferring the resin layer to the strip-shaped metal plate while continuously contacting at least one surface of the heated strip-shaped metal plate. Further, the manufacturing method of claim 2 includes: (a) a step of manufacturing a band-shaped carrier in which a resin layer is laminated on one side of the band-shaped carrier; and (b) connecting the band-shaped carrier to at least one side of a heated band-shaped metal plate. (C) cooling the integrated carrier and the band-shaped metal plate, and (d) separating the carrier from the band-shaped metal plate and transferring the resin layer to the band-shaped metal plate. And a step of performing The production method according to claim 3 includes: (a) a step of producing a band-shaped carrier in which a resin layer is laminated on one surface of the band-shaped carrier; and (b) continuously attaching the band-shaped carrier to at least one side of a heated band-shaped metal plate. (C) heating the integrated carrier and the band-shaped metal plate and then cooling; and (d) peeling the carrier from the band-shaped metal plate and changing the resin layer to a band-shaped metal plate. And a step of transferring to In these manufacturing methods, it is desirable that the resin layer is laminated on the carrier via the release layer, and that the resin layer is laminated on one side of the carrier without any gap. And it is also desirable that the resin layer is laminated on one side of the carrier in a repeated pattern.
Further, it is preferable that the carrier is a resin film, and it is preferable that the resin film is an oriented polyethylene terephthalate film which is biaxially stretched and heat-fixed. It is also preferable that the carrier is a thin metal plate or paper. Further, the resin layer may be a layer formed by applying a thermosetting resin to the carrier and drying the same, or a layer formed by applying a thermoplastic resin to the carrier and drying the thermoplastic resin, It is also preferable that the layer is formed by laminating a resin film on the carrier, that it has a printed pattern, and that it has a multilayer structure composed of at least two layers.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. First, a metal plate serving as a substrate of the resin-coated metal plate of the present invention will be described. As the metal plate, any of a commercially available painted metal plate and a metal plate used for a resin film laminated metal plate can be applied, but a steel plate, a metal such as tin, zinc, nickel, chromium, and aluminum, or a metal plate such as these. A plated steel sheet plated with an alloy of two or more metals, and further immersion treatment in an aqueous solution of dichromate,
Alternatively, a surface that has been subjected to a so-called TFS treatment comprising two layers of chromium metal and chromium hydrate oxide by a surface treatment for forming a hydrated chromium oxide by electrolytic treatment or an electrolytic treatment in an aqueous solution mainly containing chromic anhydride. Treated steel sheet, the above-mentioned plated steel sheet on which the surface treatment is further performed on a plating layer, or further an aluminum sheet, or an aluminum alloy sheet, or an aluminum sheet, or an aluminum alloy sheet, or an aqueous solution of dichromate on the aluminum alloy sheet Immersion treatment in water, immersion treatment in an aqueous solution of phosphate and dichromate, so-called non-chromium treatment immersed in an aqueous solution mainly composed of zirconium salt or titanium salt, or those subjected to the above-mentioned TFS treatment, etc. Is suitably applicable.

Next, as a carrier on which a resin layer is to be laminated in advance, a carrier having a certain degree of rigidity and made of a material which is lighter than a metal plate to be laminated makes the laminating equipment compact and easy to work, and the laminating conditions are adjusted. This is preferable in that fine control can be easily performed. Further, this carrier is peeled off from the resin layer after being heated and pressed against the metal plate together with the resin layer, and a carrier that can be repeatedly used as the carrier after peeling is preferable from an economic viewpoint. As such a carrier, a metal foil, a resin film, paper, or a composite of at least two of these can be applied to the present invention. As the metal foil, a foil of iron, steel, stainless steel, aluminum alloy, copper alloy or the like having a thickness of about 10 to 200 μm is preferable. As a resin film, it has a certain degree of rigidity to prevent the occurrence of wrinkles when laminating resin layers, and heat-resistant deformation that does not cause elongation or shrinkage when heated and pressed against a metal plate together with the resin layer Those having properties and having a smooth surface are preferred. For example, polyethylene terephthalate, polyethylene naphthalate, polymethylpentene, polypropylene, polyethylene, polystyrene, nylon, polycarbonate, polyethylene sulfide, cellophane, acetylcellulose, polytetrafluoride having a biaxially stretched and heat-set orientation. Films such as ethylene are preferred. As the paper, any paper such as paper produced from ordinary natural pulp, so-called synthetic paper formed by processing synthetic fibers or synthetic resin films like paper, and the like, can be used, such as parchment paper, woodfree paper,
Kraft paper, glassine paper, clay coated paper, coated paper and the like are preferred. Carriers made of these resins and paper are
It is desirable that the resin layer laminated thereon has such a thickness that it has a rigidity that does not cause wrinkles when heated and pressed against a metal plate, and has a thickness that does not impair economic efficiency. .

The release layer interposed between the carrier and the resin layer may be an organic polysiloxane (silicon resin) such as polydialkylsiloxane, a thermosetting silicon resin, an electron beam-curable silicone resin, a fluorine-containing resin, an aminoalkyd. The resin and the polyalkylene oxide-modified arylate are appropriately selected and used depending on the type of the carrier to be applied and the type of the resin layer laminated on the carrier so as to obtain the optimum releasability.

Next, a resin layer previously laminated on the carrier and continuously peeled off from the carrier after being pressed against a heated metal plate is made of epoxy resin, phenol resin, polyurethane, melamine resin. , Urea resin, unsaturated polyester resin, polyimide, xylene resin, guanamine resin, diallyl phthalate resin, vinyl ester resin, furan resin, thermosetting resin such as maleic acid resin, or vinyl chloride resin, vinylidene chloride resin, ionomer resin , Ethylene-vinyl chloride copolymer resin, ethylene-
Polyvinyl acetate copolymer resin, AS resin, ABS resin, cumarone resin, ketone resin, vinyl acetate resin, phenoxy resin, fluororesin, polyastal, polyvinyl alcohol,
Methacrylic resin, a coating layer formed by coating and drying a thermoplastic resin such as polyvinyl formal on the carrier, or polyethylene terephthalate, polybutylene terephthalate, terephthalic acid constituting the resin, and part of ethylene glycol or butanediol Or a polyester resin containing a copolymer in which all or other polybasic acids such as isophthalic acid and other polyhydric alcohols are substituted,
Polyolefin such as polyethylene, polypropylene, or a copolymer thereof, nylon-12, nylon-
6, a resin layer formed by laminating a film made of a thermoplastic resin such as polyamide such as nylon-6,12 or nylon-6,6 on the carrier.

[0010] The coated layer of the thermosetting resin, after being coated on the carrier, the solvent is removed and the dried layer remains
Alternatively, it is preferable that the resin is heated and dried so that only a part of the resin remains cured (heat-cured) so that the entire resin is cured when the resin is heated and bonded to a metal plate together with the carrier. Further, when the resin film is bonded to a metal plate by heating with insufficient bonding strength, it is preferable to bond the resin film with a bonding layer interposed between the resin film and the metal plate. In this case, it is preferable to provide an adhesive layer in advance on the side of the resin film that contacts the metal plate.

The thickness of the resin layer is desirably a thickness that ensures corrosion resistance, adhesion, workability, and the like according to the application and does not impair economic efficiency. However, it is generally 0.5 to 100 μm, and more preferably 5 to 50 μm.

Further, the resin layer may have a printing pattern. The printing pattern may be formed of a resin in which the printing ink used has adhesiveness, may be formed directly as a resin layer on the release layer of the carrier on which the release layer is formed, or may be formed on the carrier. A multilayer structure described below may be used, in which a printing pattern is formed on a resin layer using a normal printing ink and then an adhesive layer is provided thereon.

Further, the resin layer may be a colored resin layer to which an organic or non-permanent color pigment, or a pigment such as metal powder or mica powder capable of obtaining metallic luster or pearl luster is added. It may be a two-layer resin layer provided with a transparent resin layer thereon to give a three-dimensional appearance to the layer.
Alternatively, a multilayer resin layer may be formed based on these colored resin layers, on which a printed layer such as a grain pattern is provided, and on which a transparent resin layer is further provided. Further, the multilayer resin layers are all the same resin layer (for example, a thermosetting resin coating layer).
The resin layer constituting each layer may be composed of another resin (for example, a layer in contact with a metal plate is a thermoplastic resin coating layer, a layer thereon is a thermoplastic resin film layer, and a further layer is The thermosetting resin coating layer may be composed of three layers.

Further, the resin layer may be continuously laminated on one entire surface of the strip-shaped carrier,
Also, they may be intermittently stacked with a certain length, a certain width, and a certain interval. That is, after the resin laminated carrier is heated and adhered to the metal plate and the carrier is peeled off, a portion where the resin layer is not laminated may be provided on the metal plate.

Next, a method for manufacturing the resin-coated metal plate of the present invention will be described with reference to FIG. The belt-shaped metal plate 20 continuously unwound from the metal plate unwinding means Rc is heated by the heating means 2 (for example, a heating roll) to a temperature lower than the temperature at which the material forming the carriers 25 and 26 undergoes deformation such as expansion and contraction. Heat to On the other hand, as shown in FIG. 2, the strip-shaped resin laminated carrier 21 composed of the carrier 25 and the resin layer 22 is continuously rewound from the carrier unwinding means 3, passed through the deflector roll 5, and The resin layers 22 are brought into contact with each other, and sandwiched between a pair of laminating rolls 4 and 4 for lamination. The metal plate 20 on which the resin laminate carrier 21 is laminated is sent to the separation roll 8 provided downstream of the laminate roll 4 and
5 is peeled off, the carrier 25 is peeled off by the carrier winding means 9, and the resin-coated metal plate on which the carrier 25 is peeled off and only the resin layer 22 is laminated is wound up by the winding means 10. A plate 40 is obtained.

As another embodiment of the method of manufacturing the resin-coated metal plate 40, the resin laminated carriers 21L, 21R are so arranged that the resin layers 22L, 22R are in contact with both surfaces of the heated strip-shaped metal plate 20.
21R is abutted and sandwiched between a pair of laminating rolls 4 and 4 to be laminated, then quenched by cooling means 12 (water-filled quench tank in the figure) provided downstream thereof, and then separated by rolls 8 to separate carriers 25L and 25R. Only the carrier 25L, 2
5R and the respective winding means 9 as the resin-coated metal plate 40
L, 9R, and 10 may be wound.

Further, as another embodiment of a method of manufacturing a resin-coated metal plate, a resin laminated carrier 21 is brought into contact with a heated metal plate 20 so that a resin layer 22 is in contact with the heated metal plate 20, and is sandwiched between a pair of laminated rolls 4, 4. After laminating, the resin is reheated to a temperature equal to or higher than the melting point of the resin layer 22 by a heating means 6 such as a heating oven or an induction heating device provided downstream thereof, and rapidly cooled by a cooling means 12 provided downstream thereof. Only the carriers 25L, 25R are peeled off by the separation roll 8, and the respective winding means 9L, 9R are formed as the carriers 25L, 25R and the resin-coated metal plate 40.
R and 10 may be wound.

[0018]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. Example 1 (Manufacture of resin-coated steel sheet for two-piece can) [Preparation of resin laminated carrier 21] While unwinding a 280 mm wide kraft paper from a wound reel, a thermosetting silicone resin was used as a release layer on one side thereof. After being continuously applied with a gravure roll so as to have a dry coating amount of 0.5 g / m ² and dried, a copolymer polyester coating containing 16% by weight of a white pigment is coated thereon with a dry thickness of 15 μm. And dried (resin layer R) so that the resin laminated carrier 21
R was set on the reel 3R. On the other hand, the same strip-shaped kraft paper as above is provided on one side with the same release layer in the same manner as above, and then a transparent copolymer polyester paint is applied to a dry thickness of 10 μm and dried. (Resin layer L), and placed on a reel 3L as a resin laminated carrier 21L.

[Preparation of band-shaped metal plate 20] A band-shaped cold-rolled steel plate having a width of 300 mm and a thickness of 0.20 mm is subjected to electrolytic cleaning and pickling, and then the lower layer is subjected to ordinary electrolytic chromic acid treatment to form a lower layer of 1 mm.
07 mg / m ² of metallic chromium and the upper layer is 28 mg / m ²
After forming two layers of the chromium hydrated oxide of Example 1 and washing and drying to form an electrolytic chromic acid-treated steel sheet (TFS), it was set as a metal plate 20 on a reel Rc.

[Lamination of Resin Laminated Carrier on Band-shaped Metal Plate] While the band-shaped TFS was rewound from the reel Rc, it was heated by the heating roll 2 so that the plate temperature became 215 ° C. One side of the heated TFS is coated with a white paint (the surface of the resin layer L) while rewinding the resin laminated carrier 21L from the reel 3L provided on one side (left side) of the TFS.
It was in contact with the surface. On the other hand, at the same time, the other side of the heated TFS is provided on the opposite side (right side) and the surface coated with the transparent paint while rewinding the resin laminated carrier 21R from the reel 3R (the surface of the resin layer R) is the TFS surface. The three layers of the laminated resin carrier 21L, TFS, and the laminated resin carrier 21R were sandwiched and laminated by a pair of laminated rolls (see FIG. 3).

[Removal of Carrier] Resin laminated carrier 2
TLS coated with 1L and laminated resin carrier 21R, respectively
To the downstream of the laminating rolls 4 and 4, and the resin laminated carrier 21
L, and the resin laminated carrier 21R to the carriers 25L, 25R
Was peeled off and wound on the carrier winding reels 9L and 9R provided on each side of the TFS.
The TFS in which one surface is covered with the resin layer L and the other surface is covered with the resin layer R is a resin-coated metal plate 4 having both surfaces covered with the resin layer.
It was wound on the winding reel 10 as 0. In this way, a resin-coated steel sheet for two-piece cans having one surface white and the other surface having metallic luster (color tone of TFS) was obtained.

Example 2 (Production of resin-coated steel sheet for welding can) [Preparation of resin-laminated carrier] A biaxially stretched and strip-shaped polyethylene terephthalate film (heat fixing temperature: 230 ° C) having a width of 280 mm and a thickness of 80 µm was wound. While rewinding from the reel, the same thermosetting silicone resin as in Example 1 was continuously applied and dried as a release layer on one side in the same manner as in Example 1, and then a transparent acrylic paint was applied. As shown in Fig. 4, in the longitudinal direction of the film, every 159.8 mm
The thickness after drying is 5
It was applied intermittently to a thickness of μm and dried. Further, a pattern indicating a trademark was printed on the painted portion 31 with a printing ink composed of a urethane resin. Further, an epoxy phenolic resin containing 20% by weight of a white pigment is applied to the painted portion on which the trademark pattern is printed,
It was applied intermittently so that the thickness after drying became 5 μm and dried to form a resin layer L, which was wound around a reel 3L as a resin laminated carrier 21L. On the other hand, the same belt-shaped biaxially stretched and oriented polyethylene terephthalate film was unwound from the wound reel and the same thermosetting silicone resin as in Example 1 was used as a peeling layer on one side as in Example 1. After coating and drying continuously, apply a transparent epoxy-phenolic resin in the longitudinal direction of the film in the same manner as above.
An unpainted portion of 4 mm is provided every 159.8 mm, and is applied intermittently so that the thickness after drying becomes 12 μm and dried to form a resin layer R, and the reel 3 is formed as a resin laminated carrier 21R.
R was installed.

[Preparation of strip-shaped metal sheet] After cold-rolled steel sheet is subjected to electrolytic cleaning and pickling, 1.
After applying tin plating with a basis weight of 7 g / m ² , the tin was subsequently heated and melted (reflow treatment), and further subjected to cathodic electrolysis in an aqueous solution of sodium dichromate to form a chromate film on the tin plating. The band-shaped metal plate 20 was set on the reel Rc.

[Lamination of Resin Laminated Carrier on Band-shaped Metal Plate] While the band-shaped metal plate 20 was rewound from the reel Rc, it was heated by the heating roll 2 to a plate temperature of 220 ° C. One side of the heated metal plate 20 was brought into contact with the belt-shaped metal plate 20 while rewinding the resin laminated carrier 21L from the reel 3L provided on one side of the metal plate 20 while the white paint was applied. . On the other hand, at the same time, a reel 3 provided on the other side of the heated metal plate 20 on the side opposite to the reel 3L is provided.
The uncoated portion provided on the resin laminated carrier 21L and the unpainted portion provided on the resin laminated carrier 21R are made of metal so that the surface coated with the paint is in contact with the metal surface, and the uncoated portion provided on the resin laminated carrier 21R is unwound. The two members, the resin laminated carrier 21L, the metal plate 20, and the resin laminated carrier 21R, are sandwiched between a pair of laminated rolls 4 and 4 by adjusting the position so that the two are overlapped at the same corresponding position with the plate 20 interposed therebetween. Laminated.

[Removal of Carrier] Both sides of the resin laminated carrier 21
L and the metal plate 2 coated with the resin laminated carrier 21R, respectively.
0 to the downstream of the laminating rolls 4 and 4, and
L and the resin laminated carrier 21R, the carriers 25L, 25
Only the biaxially oriented polyethylene terephthalate film as R was peeled off and wound around the carrier winding reels 3L and 3R provided on both sides of the metal plate. The metal plate having each surface coated with the resin layer L and the resin layer R is a resin-coated metal plate 4.
It was wound on the reel 10 for winding as 0. In this manner, the resin-coated steel sheet 4 having both sides coated with the resin having an unpainted portion having a width of 4 mm at the same corresponding position on both sides of the metal plate.
0 was obtained. This resin-coated steel plate 40 is cut at the center of the unpainted portion in the longitudinal direction (a long plate having a length of 163.8 mm and a width of 280 mm having an unpainted portion of 2 mm on each side is obtained). 2 strip-shaped plates
It was cut so that one piece could be collected. The resin-coated steel sheet 40 having a size of 163.8 mm × 125 mm obtained in this manner.
After the trademark is printed on the outside and the unpainted part is rounded so as to overlap and molded into a cylindrical shape, the overlapped unpainted part is welded to form a welded can body having a can diameter of 52 mm. Obtained.

Example 3 (Production of decorative steel sheet) [Preparation of laminated resin carrier] Electrochromic treatment (96 mg / m ² metal chromium in lower layer and 19 mg / m ^{2 in} upper layer)
Chromium hydrated oxide of 2 layers) 280 m wide
m, a 30 μm-thick steel foil as a carrier, and on one surface thereof, a thermosetting silicone resin similar to that of Example 1 was continuously applied as a release layer in the same manner as in Example 1, dried, and then dried. Wood pattern printing was performed with ink. Furthermore, an epoxy-phenol-based paint containing 15% by weight of a brown pigment,
The resin layer L was formed by applying and drying the dried layer to a thickness of 5 μm to form a resin layer L, which was mounted on a reel 3L as a resin laminated carrier 21L. On the other hand, while rewinding a 15 μm-thick biaxially oriented polyethylene terephthalate film coated with a 2 μm-thick epoxy adhesive on one side, a release layer was provided on one side in the same manner as above, and then a transparent epoxy A phenolic paint was applied so as to have a thickness of 10 μm after drying and dried to form a resin layer R, which was installed on a reel 3R as a resin laminated carrier 21R.

[Preparation of strip-shaped metal plate] Width 300 mm, thickness
A 0.5 mm cold-rolled steel sheet is electrolytically washed and pickled, then a 20 g / m ² galvanized layer is formed by a normal electrogalvanizing method, and then dipped in a chromic acid aqueous solution to form a chromate film. After washing with water and drying, the metal plate 20 was set on the reel Rc.

[Lamination of laminated resin carrier on metal plate] Reel R
c, the strip-shaped electrogalvanized steel sheet 20 (metal sheet 2
0), the sheet temperature is 210 ° C. with the heating roll 2 while rewinding
Was heated so that One side of the heated electrogalvanized steel sheet was brought into contact with the galvanized surface while unwinding the resin laminated carrier 21L from the reel 3L provided on one side while the epoxy-phenol-based paint was applied.
At the same time, the uncoated surface of the epoxy-phenol-based paint comes into contact with the galvanized surface while rewinding the resin laminated carrier 21R from the reel 3R provided on the other side to the other surface of the heated electrogalvanized steel sheet. So that the three members of the laminated resin carrier 21L, the electrogalvanized steel sheet, and the laminated resin carrier 21R are sandwiched and laminated by a pair of laminated rolls 4, 4, and further provided downstream of the laminated rolls 4, 4. After being led to a high-frequency induction heating furnace (heating means 6) set so that the temperature of the metal plate is set to 200 ° C. and reheated, it is led to a water-filled quench tank (cooling means) 12 provided downstream thereof and rapidly cooled. Dried.

[Removal of Carrier] Both sides of the resin laminated carrier 21
L and the laminated resin carrier 21R are respectively guided to the downstream of the high-frequency induction heating furnace, and the resin laminated carrier 21L and the laminated steel carrier 21R are converted into steel as the carrier in the same manner as in Example 1. The foil and the film are peeled off, and the carrier winding reels 9L and 9L are wound in the same manner as in Example 1.
It was wound around R. The electrogalvanized steel sheet having each surface coated with the resin layer L and the resin layer R was wound on a winding reel 10 as a resin-coated metal plate 40. Thus, a decorative steel plate having a wood grain pattern on one side was obtained.

[0030]

According to the method of the present invention, a resin layer to be laminated on a metal plate is previously laminated on one surface of a carrier made of a material having a certain degree of rigidity and lighter than the laminated metal plate. The resin laminated carrier is heated and pressed against the metal plate so that the resin layer is in contact with the metal plate, and then only the carrier is peeled off to form the optimal resin layer for the intended application under easy lamination conditions and dimensions. It is possible to laminate directly on a metal plate with good precision.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating a manufacturing process of a resin-coated metal plate of the present invention.

FIG. 2 is a cross-sectional view showing a structure of a resin laminated carrier.

FIG. 3 is a cross-sectional view showing a structure before carrier separation.

FIG. 4 is a plan view showing the structure of an example of the resin-coated metal plate of the present invention.

[Explanation of symbols]

 Rc: metal plate rewinding means 2, 6: heating means 3: rewinding means (reel) 4: laminating roll 5: deflector roll 8: separating roll 9: winding means (reel) 12: cooling means 20: metal plate 21 , 21L, 21R: laminated resin carrier 22: resin layer 25, 25L, 25R: carrier 30: unpainted portion 31: painted portion 40: resin-coated metal plate

Claims (15)

[Claims] (1) a step of producing a band-shaped carrier in which a resin layer is laminated on one surface of a band-shaped carrier;
Transferring the resin layer to the strip-shaped metal plate while continuously adhering to at least one surface of the heated strip-shaped metal plate. 2. A step of producing a band-shaped carrier in which a resin layer is laminated on one side of a band-shaped carrier;
(C) cooling the integrated carrier and the strip-shaped metal plate, and (d) removing the carrier from the strip-shaped metal plate. Peeling and transferring the resin layer to a strip-shaped metal plate. 3. A step of producing a band-shaped carrier in which a resin layer is laminated on one side of a band-shaped carrier, and (b) a step of producing the band-shaped carrier.
(C) heating the integrated carrier and the strip-shaped metal plate and then cooling the same; and (d) removing the heat from the strip-shaped metal plate. Peeling the carrier and transferring the resin layer to a strip-shaped metal plate. 4. The method for producing a resin-coated metal sheet according to claim 1, wherein the resin layer is laminated on the carrier via a release layer. 5. The method for producing a resin-coated metal sheet according to claim 1, wherein the resin layer is laminated on one surface of the carrier without any gap. 6. The method for producing a resin-coated metal sheet according to claim 1, wherein said resin layer is repeatedly laminated on one surface of said carrier. 7. The method for producing a resin-coated metal plate according to claim 1, wherein the carrier is a resin film. 8. The method for producing a resin-coated metal sheet according to claim 7, wherein the resin film is a polyethylene terephthalate film having an orientation, which is stretched in a biaxial direction and then heat-set. 9. The method according to claim 1, wherein the carrier is a thin metal plate.
7. The method for producing a resin-coated metal sheet according to any one of 6. 10. The method for producing a resin-coated metal plate according to claim 1, wherein the carrier is paper. 11. The method for producing a resin-coated metal sheet according to claim 1, wherein said resin layer is a layer formed by applying a thermosetting resin to said carrier and drying it. 12. The method for producing a resin-coated metal sheet according to claim 1, wherein said resin layer is a layer formed by applying a thermoplastic resin to said carrier and drying it. 13. The resin layer according to claim 1, wherein the resin layer is a layer formed by laminating a thermoplastic resin film on the carrier.
The method for producing a resin-coated metal plate according to any one of the above. 14. The method according to claim 1, wherein the resin layer has a printed pattern. 15. The method for producing a resin-coated metal sheet according to claim 1, wherein the resin layer has a multilayer structure composed of at least two layers.