KR101500422B1 - Method for preparing laminating steel sheet with embossed external appearance - Google Patents

Abstract

The present invention relates to a method to manufacture an embossed treated laminating steel plate and, more specifically, to a method to manufacture an embossed treated laminating steel plate comprising: a step of preparing a metal plate; a step of forming a chemical treated layer in one side or both sides of the metal plate; a step of applying a lower coating composition on one side of the metal plate having the chemical treated layer, and forming a lower coating layer by first baking; a step of applying an upper coating composition on the lower coating layer, and forming an upper coating layer by second baking at the temperature of 170-270°C; a step of providing a film preheated at 80-170°C on the upper coating layer; a step of primary pressing the film; and a step of secondary pressing the primary pressed film at the temperature of 170-270°C by an emboss roll. The present invention has effects of manufacturing a laminated steel plate with excellent touch and a sharp concavo-convex pattern on the surface, thereby improving competitiveness of the quality. Moreover, elongation and thickness of a film are different depending on the type, thereby the quality is changed depending on the pressure or the like of a press roll and an emboss roll when a laminated steel plate is manufactured. However, the present invention has the advantage of corresponding to fit film properties by adjusting the amount of reduction of a press roll and an emboss roll, thereby stably manufacturing a high quality product with improved appearance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an embossed laminated steel sheet,

The present invention relates to a method for producing a laminated steel sheet which is embossed, and more particularly, to a method for producing a laminated steel sheet excellent in three-dimensional texture which can be used for an exterior panel for household appliances, a board for interior decoration of buildings,

An embossed laminating steel sheet having a three-dimensional texture refers to a steel sheet coated with various films on the surface of an electro-galvanized steel sheet, a hot-dip galvanized steel sheet, a cold-rolled steel sheet or the like as a material, and is mainly used for a refrigerator, And the like. The steel sheet has been developed for use in the exterior of a home appliance such as a door or an interior or exterior of a building.

In this regard, prior arts such as Korean Patent Laid-Open No. 10-2011-0067556 disclose a method of manufacturing a metal sheet having a three-dimensional texture by preparing a film having a three-dimensional texture imparted to the embossed shape and bonding the film to the coated steel sheet / RTI >

However, according to this method, when the film having the three-dimensional texture is attached to the coated steel sheet, the unevenness tends to be flattened in the process of heating and adhering the film and the coated steel sheet, There is a problem that the three-dimensional texture is further weakened by being pressed by the pressing roll.

On the other hand, in the production of laminated steel sheets, there is a demand for a product having a pattern and a variety of three-dimensional texture imparted to a monolithic coated steel sheet produced in a general continuous color process, but in the conventional process, the actual touch is deteriorated, .

Therefore, it is expected that a method of manufacturing a new embossed laminated steel sheet which does not deteriorate the three-dimensional texture during the manufacturing process can be usefully used in related fields.

Korean Patent Publication No. 10-2011-0067556

An aspect of the present invention is to provide a method of manufacturing an embossed laminated steel sheet in which the three-dimensional texture does not deteriorate during the manufacturing process.

According to one aspect of the present invention, there is provided a method of manufacturing a metal plate, Forming a chemical conversion layer on one side or both sides of the metal plate; Applying a primer coating composition to one surface of the metal plate on which the chemical conversion treatment layer is formed, and forming a primer coating layer by a first baking treatment; Applying a top coat composition on the undercoat layer and forming a top coat layer by a second baking treatment at a temperature of 170 캜 to 270 캜; Providing a film preheated on said top coat layer at 80 占 폚 to 170 占 폚; First pressing the film; And subjecting the primary squeezed film to a secondary pressing with an emboss roll at a temperature of 170 ° C to 270 ° C to produce an embossed laminated steel sheet.

The film is preferably a resin film comprising at least one component selected from the group consisting of polyethylene, polyvinyl chloride, polypropylene, thermosetting polyolefin, thermoplastic polyolefin and polystyrene.

The film may be a multilayer film in which two or more films are laminated.

Wherein the metal sheet material comprises a non-carbon steel sheet comprising at least one component selected from the group consisting of Al, Mg and Cu; Carbon steel plate; A plated steel plate plated with at least one component selected from the group consisting of Zn, Al, Mg, Sn, Ti, Cr, Cu, Pb, W and Zr; Or a stainless steel sheet.

It is preferable that the chemical conversion treatment layer is formed using a chromium conversion treatment liquid or a chromium free chemical conversion treatment liquid.

The thickness of the converted layer is preferably 1.0 to 4.0 탆.

It is preferable that the undercoating film composition contains 5 to 20% by weight of polyester, 5 to 15% by weight of a rust preventive pigment and the balance of an organic solvent.

The thickness of the undercoating layer is preferably 4.0 to 10.0 탆.

The top coat composition preferably comprises at least one selected from the group consisting of polyester, modified polyester, high polymer polyester, silicone, fluorine, and acryl urethane.

The thickness of the top coat layer is preferably 5.0 to 30.0 mu m.

It is preferable to further include a step of subsequently quenching the second pressing step with the embossing roll.

It is preferable to further include a thin coating formed on one surface or both surfaces of the metal plate on which the chemical conversion treatment layer is formed, on a surface on which no undercoating layer is formed.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to produce a laminated steel sheet excellent in touch and clear on the surface thereof, and therefore, it is expected to improve the quality of the laminated steel sheet. Also, since the elongation and thickness of the film differ depending on the type thereof, the quality of the laminated steel sheet changes depending on the pressure of the pressing roll and the embossing roll. However, according to the present invention, it is possible to control the reduction amount of the pressing roll and the embossing roll, so that it is possible to cope with the film characteristic, and thus it is possible to stably produce a high quality and beautiful product.

FIG. 1 schematically illustrates an exemplary process of the embossed laminated steel sheet manufacturing method of the present invention.
2 is a schematic view showing the structure of a steel sheet produced by the method of manufacturing an embossed laminated steel sheet according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

According to the present invention, there is provided a method for producing a laminated steel sheet embossed by producing a film in a continuous process, compressing the same, performing secondary compression with reheating, and simultaneously applying compression and unevenness.

In more detail, the method of manufacturing an embossed laminated steel sheet of the present invention comprises the steps of: providing a metal sheet; Forming a chemical conversion layer on one side or both sides of the metal plate; Applying a primer coating composition to one surface of the metal plate on which the chemical conversion treatment layer is formed, and forming a primer coating layer by a first baking treatment; Applying a top coat composition on the undercoat layer and forming a top coat layer by a second baking treatment at a temperature of 170 캜 to 270 캜; Providing a film preheated on said top coat layer at 80 占 폚 to 170 占 폚; First pressing the film; And secondarily pressing the primary squeezed film with an emboss roll at a temperature of 170 ° C to 270 ° C.

Hereinafter, with reference to FIGS. 1 and 2, a method for manufacturing a laminating steel sheet excellent in three-dimensional texture and a steel sheet produced therefrom will be described in detail.

The embossed laminated steel sheet having excellent three-dimensional texture according to the present invention is prepared by first preparing a metal plate material (1, 101), applying a chemical liquor on one side or both sides of the metal plate material and then drying , The undercoat layer composition is applied to one surface of the metal plate on which the chemical conversion layer is formed, and then the first undercoat layer is baked in a baking oven to form the undercoat layer 103 A top coat composition is applied on the undercoat layer and a second baking treatment is performed in a baking oven at a temperature of 170 to 270 ° C to form an overcoat layer 104, Is preheated to 80 DEG C to 170 DEG C from a film feeder (3), and after primary pressing the film, the primary pressed film is heated to a temperature of from 170 DEG C to 270 DEG C, The step of secondary pressing with the roll (7) It is.

In FIG. 1, the preheated film may be provided on a metal plate through a film feeder 3, and the film and the metal plate are laminated and then squeezed by a press roll 4, Heat is applied by the baking oven 5, and then the roll formed of the back-up roll 6 and the embossing roll 7 is passed through and the lamination is firmly formed, and at the same time, the three-dimensional texture can be effectively formed.

In the step of providing the metal plate 1, the material of the metal plate 1 is not particularly limited, and any material used in an ordinary continuous color process is applicable. For example, the metal plate may be a non-carbon steel plate comprising at least one component selected from the group consisting of Al, Mg and Cu; Carbon steel plate; A plated steel plate plated with at least one component selected from the group consisting of Zn, Al, Mg, Sn, Ti, Cr, Cu, Pb, W and Zr; Or a stainless steel sheet.

The non-carbon steel sheet preferably contains at least one component selected from the group consisting of Al, Mg and Cu as a main component in consideration of the weight reduction, high strength and high porosity of the coated steel sheet. On the other hand, a coated steel sheet having a metal coating layer formed in consideration of the corrosion resistance and paintability of the coated steel sheet can also be used.

The step of forming the chemical conversion layers 102 and 102 'on both sides of the metal plate can be performed by, for example, applying a chemical conversion solution and drying the chemical conversion layer. On the other hand, the type of the chemical conversion solution is not particularly limited, and a chromium conversion solution or a chromium free high corrosion resistance conversion solution can be used.

The chemical liquor which can be used in the step of forming the chemical conversion layer includes, for example, a chemical liquor containing 10 to 15% by weight of Cr (+6), 5 to 15% by weight of silicon oxide, Or a chemical treatment liquid containing 1 to 5% by weight of ammonium zirconyl carbonate, 1 to 5% by weight of a vanadium compound, 1 to 10% by weight of silicon dioxide and the remainder.

The drying means that can be applied in the case of drying after coating the chemical conversion solution is not particularly limited. For example, an IR heater using infrared rays, an induction heater, a drying oven, It is preferable to be a device capable of controlling a heat source such as a heat source.

The thickness of the chemical conversion layer formed after drying is preferably 1.0 to 4.0 占 퐉 in consideration of the drying time of the chemical conversion treatment liquid applied and the adhesion between the chemical conversion layer and the upper and lower layers thereof in the lamination structure formed after drying. If the thickness of the chemical conversion layer is less than 1.0 탆, the metal plate may be exposed to the outside when corrosion occurs in the undercoat layer or the top coat layer, thereby causing corrosion. On the other hand, when the thickness of the chemical conversion treatment layer is more than 4.0 탆, the cost due to the increase in the amount of the chemical conversion treatment solution increases, but it is unexpected because it is difficult to expect an improvement in the corrosion resistance effect relative to the thickness.

By forming the chemical conversion layer on one side or both sides of the metal plate as described above, the adhesion of the upper surface of the metal plate to the undercoat layer is improved. On the other hand, when a base coat (thin coating) Adhesion with the layer can also be improved.

In the step of applying the undercoating composition to one surface of the metal plate on which the chemical conversion treatment is formed and forming the undercoat layer 103 by the first baking treatment, the undercoat composition comprises 5 to 20% by weight of polyester, 5 to 15% by weight of the pigment and the balance of the organic solvent.

The kind of the anticorrosive pigment that can be used at this time is not particularly limited, but may be at least one selected from the group consisting of chromium, strontium, nickel, calcium and potassium. The type of the organic solvent is not particularly limited, but may be at least one selected from the group consisting of thinner, solvent, toluene, and cyclohexanone.

The thickness of the undercoat layer formed by the first baking treatment is preferably 4.0 to 10.0 탆 in consideration of the drying time of the applied undercoat composition and the adhesion between the undercoat layer and the upper and lower layers thereof in the laminate structure to be formed . When the thickness of the undercoating layer is less than 4.0 탆, the adhesion to the topcoating layer is lowered and the hue of the metal plate is exposed to the outside, which may cause defects due to color discrepancy. On the other hand, When the thickness of the coating layer is more than 10.0 탆, economical efficiency is lowered due to the use of a coating material more than necessary.

Wherein the top coat composition is applied onto the undercoat layer and the second baking treatment is performed at a temperature of 170 to 270 ° C to form the top coat layer 104, It is preferable to include at least one selected from the group consisting of polyester, modified polyester, high polymer polyester, silicone, fluorine, and acryl urethane.

The top coat composition for forming the top coat layer should have excellent surface smoothness and processability, and should have strong adhesion to metals and adhesives. The top coat composition that satisfies these requirements may use a polyester resin as a base resin, and may include a pigment and a cross-linking agent. In addition, blocked catalysts and surface modifiers may be further included to adjust the cure rate with additives

For example, the polyester resin is preferably added in an amount of 40 to 70% by weight based on the total top coat composition, and the weight average molecular weight of the resin is preferably 10,000 to 30,000, If it is more than 30,000, there is a problem that hardening of the coating film is not smooth and it is difficult to increase the solid content of the coating material. On the other hand, Tg is preferably 10 to 50 ° C, and if it is lower than 10 ° C, the adhesion to the metal and the adhesive agent is lowered, and if it exceeds 50 ° C, the hardness of the coating film is increased and the workability is lowered. The hydroxyl value (OH Value) is preferably in the range of 10 to 50, and when it is less than 10, the curing agent and the degree of crosslinking are lowered, and when it exceeds 50, the adhesive force with the adhesive may be lowered.

The pigment is preferably added in an amount of 0.1 to 30% by weight based on the total top coat composition, and is generally divided into organic and inorganic pigments. These pigments can be used singly or in combination.

As the crosslinking agent, a melamine resin can be used, and it is preferable to add it in an amount of 5 to 15% by weight based on the total top coat composition. Generally, it is divided into methoxy melamine and butoxy melamine, which may be used alone or in combination.

The containment type catalyst is preferably added in an amount of 0.1 to 5% by weight based on the total top coat composition, and is generally divided into p-TSA, DNNDSA, DNNSA, DDBSA and mixed acid catalyst, Or may be used in combination.

The surface control agent is preferably added in an amount of 0.1 to 5% by weight based on the total top coat composition, and is generally divided into a silicone-based and non-silicone-based coating, Do.

In the step of forming the upper coat layer, the second baking process is preferably performed at a temperature of 170 ° C to 270 ° C. In particular, when the temperature of the outlet side of the metal plate coated with the top coat composition is 170 to 270 ° C . If the temperature is less than 170 ° C, there is a problem that the film is not sufficiently adhered. If the temperature exceeds 270 ° C, there is a problem that the film is broken or deformed.

For example, in the case of using a film of the present invention in which a polyvinyl chloride (PVC) film is laminated on the lower part of a polyethylene film, when the temperature is lower than 170 ° C, the adhesive force for attaching the film to the upper coat layer However, when the temperature exceeds 270 ° C, a polyethylene (PET) resin imparting a three-dimensional texture melts and the film breaks down The shape tends to adhere in a deformed form.

The thickness of the top coat layer is preferably 5 to 30 占 퐉 in consideration of the drying time of the applied top coat composition and the adhesion between the upper and lower layers in the laminated structure to be formed.

The method of applying the chemical conversion coating liquid, the undercoating film composition and the top coat composition is not particularly limited and may be carried out by, for example, a roll coating method in the case of contact type or a die coating method in the case of non-contact type.

The first baking treatment means and the second baking treatment means are not particularly limited in the present invention. However, the first baking treatment means and the second baking treatment means are not limited to the present invention, but may be used in combination with IR heaters, It is preferable to be a device capable of controlling a heat source.

According to the present invention there is provided a process for producing a film comprising the steps of: subsequently providing a film preheated on said top coat layer at a temperature of from 80 DEG C to 170 DEG C; First pressing the film; And a step of secondarily pressing the primary squeezed film with an emboss roll at a temperature of 170 ° C to 270 ° C. By carrying out these steps, the embossed laminated steel sheet of the present invention is produced.

The film which can be used in the present invention is preferably a material which can be attached to the top coat layer by heating and to which a three-dimensional texture can be imparted by the embossing treatment. The film may be a single layer film, May be in the form of a laminated film.

Specifically, the film of the present invention is characterized in that the film is made of polyethylene (PET, melting point 220 캜), polyvinyl chloride (PVC, melting point 170 캜), polypropylene (PP, melting point 165 캜), thermosetting polyolefin (TPO, melting point 220 占 폚) and polystyrene (PS, melting point 240 占 폚), and preferably the film may be a resin film containing at least one component selected from the group consisting of a thermoplastic polyolefin It may be a multilayer film in the form of a printed film or a stack of two or more films.

When the film is formed of a multilayer film in which two or more films are laminated, it is preferable that the film disposed at the lower side has a low melting point. For example, when a polyethylene film is used, Low-polyvinyl chloride can be further laminated to the lower layer. In this case, the polyvinyl chloride has a melting point of 170 ° C, so that when the heat is applied, the lower layer is more easily tacky and is advantageous for adhesion.

On the other hand, since the melting point of the resin in the form of a polymer compound such as the film is not constant, when the film having a large melting point deviation is laminated, the embossed film laminated on the upper side is melted and the quality may be deteriorated. Therefore, the larger the difference in melting point between the laminated films is, the more advantageous it is, but the difference of 30 DEG C or more is preferable in terms of stable production.

Most preferably, the film is a laminated film comprising a polyvinyl chloride (PVC) resin film as an adhesive film 106 for imparting an adhesive force and a polyethylene (PET) resin film as an embossed film 107. Although the adhesive film and the embossed film are not clearly distinguished from each other by the film component, when the multilayered film laminated in the present invention is used, the lower film is referred to as an adhesive film and the upper film as an embossed film for convenience.

On the other hand, since the film is relatively low in temperature compared to the metal plate on which the top coat layer is formed, the film may not be completely adhered. Therefore, before the top coat layer is pressed, . If the temperature of the preheated film is lower than 80 캜, the film may not be sufficiently preheated and the adhesion of the film may be insufficient. On the other hand, when the temperature of the preheated film exceeds 170 캜, for example, polyvinyl chloride ) Film is pre-melted to cause a problem of contamination of the roll.

The step of primary pressing the film should be performed so as to give sufficient adhesion between the top coat layer and the film. For this purpose, it is preferable that heat is applied together with the pressure, If the latent heat of the metal plate on which the top coat layer is formed is used, no additional heating device is necessary.

When the film attachment is completed by performing the primary pressing step, it is preferable to carry out a step of re-heating the film to improve the adhesive force of the film, soften the surface, and secondary press with the emboss roll.

The reheating temperature is preferably 170 to 270 ° C. If the reheating temperature is less than 170 캜, the film may not sufficiently melt and the film may not be flat. On the other hand, when the reheating temperature exceeds 270 캜, the film imparted with the three-dimensional texture design may be deformed.

For example, when a laminated film comprising a polyvinyl chloride (PVC) resin film as an adhesive film 106 for imparting an adhesive force and a polyethylene (PET) resin film as an embossed film 107 is used, (PVC) resin film which imparts the adhesive force is not melted and remains in a fixed state, and thus the film tends not to be flat. On the other hand, when the reheating temperature exceeds 270 DEG C, (PE) resin is melted or deformed.

In the case of carrying out the second pressing step with the embossing roll, since the embossing and stitching, that is, the three-dimensional texture is imparted to the film by the embossing pattern of the embossing roll, So that the film peeling phenomenon can be effectively prevented.

The method of applying the necessary pressure in the primary pressing step and the secondary pressing step is not particularly limited. For example, a pressure applying method using two or more pressing rolls in the longitudinal direction of the plate material have. In this case, an actuator device that applies pressure to the squeeze roll may be used, and is not particularly limited, and for example, a pneumatic cylinder, a hydraulic cylinder, an electric motor, or the like may be used.

Meanwhile, the means for preheating and the heat source for reheating are not particularly limited as long as it is a heating device capable of controlling the temperature. For example, an infrared ray heater using infrared rays, a steam heating roll ), An electric heating roll, and the like.

Further, it is preferable that the step of quenching the laminated steel sheet by the rapid cooler (8) is followed by the step of quenching the laminated steel sheet at the secondary pressing step with the emboss roll.

The quenching step is preferably performed at a temperature of 0 to 40 ° C, And preferably at a rate of 50 ° C / sec to 150 ° C / sec. When the quenching rate is less than 50 ° C / sec, there is a problem that the surface of the embossed film is not hardened and is flattened again by other rolls, and when it exceeds 150 ° C / sec, energy consumption is increased for excessive cooling have.

The quenching step may be performed by, for example, a water-cooling device 8 without particular limitation. In the case of performing the quenching step, the uneven patterns imparted to the film are rapidly adhered, Can be maximized.

In addition, in the method of manufacturing an embossed laminated steel sheet according to the present invention, it is possible to further include a thin coating 105 on one side or both sides of the metal sheet on which the chemically treated layer is formed, have. The thin coating layer is a basic coating layer formed on a metal plate. The thin coating layer is wrapped in a coil form in the form of a metal plate and is transported or cut into a sheet form and laminated and transported. In this case, the top surface of the metal plate is damaged In addition, due to the ambient humidity, the surface may be corroded and surface defects such as red or white may appear. In addition, when the plate is molded, friction may occur between the mold and the processing machine and scratches and surface contamination may occur To prevent this phenomenon, it is possible to treat thin coatings with corrosion resistance and surface lubricity.

The coating composition for forming the thin coating layer is not particularly limited, but may include an epoxy resin of bisphenol-A type, a polyamine crosslinking agent, and a p-toluene sulfonic acid (p-TSA) It is possible to solve the adhesion problem, and the corrosion resistance and the chemical resistance can be improved.

More specifically, the composition of the thin coating layer forming composition is as follows.

The epoxy resin as the main resin preferably has an epoxy equivalent of 1,750 to 2,100 EEW (g / eq), a molecular weight (Mw) of about 2,900, a hydroxyl value of about 0.36 equivalents / 100 g and a melting point of 122 to 131 ° C, and bisphenol A and epi May be an epoxy resin of bisphenol-A type obtained by reaction of epichlorohydrin.

If the content of the resin is less than 25% by weight, the durability of the coating film is deteriorated. If the content of the resin is more than 40% by weight, the amount of the resin There is a problem that the hardness of the coating film is lowered.

As the crosslinking agent for forming a coating film with the epoxy resin component described above, a polyamine resin may be included, and addition reaction of an epoxy group with an amine is common in a small-type drying system. The amine / epoxy equivalent ratio of the epoxy resin to the amine crosslinking agent is preferably about 1 to about 0.5, and if the epoxy resin is less than 0.5, the hardening degree of the coating film may be poor, and if it exceeds 1.0, the workability of the coating film may be deteriorated.

Toluene sulfonic acid (p-TSA) amine may be neutralized with a curing catalyst, and a low temperature dissociation type curing agent having a dissociation temperature of 100 to 120 ° C may be used. The curing catalyst may improve the physical properties of the cured coating film while lowering the curing temperature of the coating film in the course of forming the coating film and may improve the storage stability of the coating. The curing catalyst may be used in an amount of 0.5 to 1.0 By weight based on the total weight of the composition.

It is preferable that aromatic solvents, glycol esters, glycol ethers, and alcohol solvents are appropriately mixed and used as the organic solvent that can be used in the preparation of the thin coating layer forming composition.

Examples of the aromatic hydrocarbon-based solvent include cocosol # 100 and cocosol # 150 manufactured by SK Company. Examples of the glycol ester solvent include ethyl acetate, n-butyl acetate, cellosolve acetate, propylene glycol monomethyl acetate, 3- Methoxybutyl acetate, and the like. Examples of the glycol ether-based solvent include methyl cellosolve, ethyl cellosolve, ethylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, and diethylene glycol butyl ether of Union Carbide. Examples of the alcohol- Isopropanol, n-butanol, amyl alcohol, cyclohexanol and the like. The above-mentioned solvents may be included in the range of 10 to 25% by weight based on the total composition.

As the colored pigment, a pigment such as titanium oxide, carbon black or the like which can be used in the coating composition field may be added. In addition, the composition of the present invention may include extender pigments such as talc, clay, silica, mica, alumina and the like, fillers and the like. The above-mentioned pigments may be included in the range of 20 to 30% by weight based on the total composition.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made without departing from the scope of the invention. It will be obvious to those who have knowledge of

1, 101: Metal plate (Strip, Substrate)
2, 5: 2 Baking Oven
3: Film Feeder
4: Press Roller
5: Third baking oven (No.3 Baking Oven)
6: Backup Roller
7: Embossed Roller
8: Water Chiller
102, 102 ': Chemical coating
103: bottom coating (primer coating)
104: top coating (base coating)
105: service coating
106: Adhesive Film (PVC)
107: Pattern Film (PET)
108: Texture Pattern

Claims (12)

Providing a metal sheet;
Forming a chemical conversion layer on one side or both sides of the metal plate;
Applying a primer coating composition to one surface of the metal plate on which the chemical conversion treatment layer is formed, and forming a primer coating layer by a first baking treatment;
Applying a top coat composition on the undercoat layer and forming a top coat layer by a second baking treatment at a temperature of 170 캜 to 270 캜;
Providing a film preheated on said top coat layer at 80 占 폚 to 170 占 폚;
First pressing the film; And
Subjecting the primary squeezed film to a secondary pressing with an emboss roll at a temperature of 170 ° C to 270 ° C
Wherein the embossed laminated steel sheet has an embossed surface.
The method according to claim 1, wherein the film is a resin film comprising at least one component selected from the group consisting of polyethylene, polyvinyl chloride, polypropylene, thermosetting polyolefin, thermoplastic polyolefin and polystyrene .
The method of manufacturing an embossed laminated steel sheet according to claim 2, wherein the film is a multilayer film in which two or more films are laminated.
The non-carbon steel sheet according to claim 1, wherein the metal plate comprises at least one component selected from the group consisting of Al, Mg and Cu; Carbon steel plate; A plated steel plate plated with at least one component selected from the group consisting of Zn, Al, Mg, Sn, Ti, Cr, Cu, Pb, W and Zr; Or a stainless steel plate.
The method of manufacturing an embossed laminated steel sheet according to claim 1, wherein the chemical conversion treatment layer is formed using a chromium conversion solution or a chromium free chemical solution.
The method for producing an embossed laminated steel sheet according to claim 1, wherein the chemical conversion treatment layer has a thickness of 1.0 to 4.0 탆.
The method for producing an embossed laminated steel sheet according to claim 1, wherein the undercoating film composition comprises 5 to 20% by weight of polyester, 5 to 15% by weight of a rust inhibitive pigment, and the balance of an organic solvent.
The method of manufacturing an embossed laminated steel sheet according to claim 1, wherein the thickness of the undercoat layer is 4.0 to 10.0 탆.
The method according to claim 1, wherein the top coat composition comprises at least one selected from the group consisting of polyester, modified polyester, high polymer polyester, silicone, fluorine, and acryl urethane.
The method for manufacturing an embossed laminated steel sheet according to claim 1, wherein the upper coating layer has a thickness of 5.0 to 30.0 탆.
The method of manufacturing an embossed laminated steel sheet according to claim 1, further comprising a subsequent quenching step following the second pressing step with the embossing roll.
The method for manufacturing an embossed laminated steel sheet according to claim 1, further comprising a thin coating formed on a surface of the metal plate on which the chemical conversion treatment layer is formed, on one side or both sides of the metal plate.

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