KR102239357B1 - A manufacturing system for laminated steel sheet with three dimensional pattern - Google Patents

Abstract

One aspect of the present invention provides a system for manufacturing a laminated steel sheet, including: an immersion means which is for forming a chemical conversion coating layer on a base steel plate; a coating means which is installed downstream of the immersion means and coats an adhesive composition on the chemical conversion coating layer; a lamination means which is installed downstream of the coating means and attaches a laminate film on the adhesive composition; a three-dimensional pattern forming means which is installed downstream of the lamination means and forms a three-dimensional pattern by pressing an embossing roll on the laminate film; and a release layer removing means which is installed downstream of the three-dimensional pattern forming means and removes the release layer of the laminate film.

Description

Manufacturing system of laminated steel sheet having a three-dimensional pattern {A MANUFACTURING SYSTEM FOR LAMINATED STEEL SHEET WITH THREE DIMENSIONAL PATTERN}

The present invention relates to a system for manufacturing a laminated steel sheet having a three-dimensional pattern.

Conventional steel plate coating methods include a post-coating method and a pre-coating method. The former post-coating method is a method of painting a steel plate after molding, and the latter pre-coating method is a steel plate. This is a method of painting before molding.

The post-coating method has a disadvantage in that the equipment cost is low and it is advantageous for small quantity production, but it is difficult to produce a uniform product and mass production. have. In general, PCM steel sheets have excellent durability and durability, and are excellent in productivity, and are therefore applied to various fields such as construction materials and home appliances. However, due to the characteristics of the continuous process, since it is mainly produced with an offset-type roll coating, there is a problem in that the designability is deteriorated, and the metallic feel, image image quality, and printability are deteriorated.

In order to solve this problem, VCM (Vinyl Coated Metal) steel sheet, that is, laminated steel sheet, has been developed that attaches film and steel sheet manufactured with gravure coating using an adhesive to give excellent metal feel, image sharpness, and printability. .

However, since the laminated steel sheet has a film with low hardness such as PET on the outermost layer, defects such as scratches and lifts on the surface may easily occur during processing due to the low hardness of the film itself, and repair in case of defects Because it is impossible, there is a problem that the entire product needs to be replaced.

In order to improve the processability of the laminate film, a method of using a two-layered film including PVC has been proposed, but the manufacturing cost is high and harmful substances may be generated by the application of PVC, which may be harmful to the human body, and its use is limited. Has become.

Therefore, there is a need to develop a technology for a laminate steel sheet manufacturing system that can realize the advantages of a VCM steel sheet such as metal feel, sharpness, and printability while realizing adhesion, workability, and hardness, which are the advantages of PCM steel sheet. .

The present invention is to solve the problems of the prior art described above, the object of the present invention is to remove the release layer from the laminate film, so that the curable coating layer is disposed on the outermost surface of the steel sheet, excellent adhesion of the PCM steel sheet, It is to provide a laminated steel sheet that not only realizes workability and hardness, but also realizes the excellent metal feel, sharpness and printability of VCM steel sheet.

In addition, another object of the present invention is to provide a laminated steel sheet that implements a more beautiful three-dimensional texture and sharpness by removing the release layer and disposing an imprinting layer on the outermost surface of the remaining steel sheet.

One aspect of the present invention, an immersion means for forming a chemical conversion film layer on the holding steel plate; A coating means installed downstream of the immersion means and coating an adhesive composition on the chemical conversion film layer; A lamination means installed downstream of the coating means and for attaching a laminate film on the adhesive composition; A three-dimensional pattern forming means installed downstream of the laminating means and pressing on the laminate film with an emboss roll to form a three-dimensional pattern; And a release layer removing means installed downstream of the three-dimensional pattern forming means and removing the release layer of the laminate film.

In one embodiment, the laminate film is a base film; A first cured coating layer formed on the base film; A metal layer formed on the cured coating layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer.

In one embodiment, the laminate film is a base film; An imprinting layer formed on the base film and implementing a hairline; A metal layer formed on the imprinting layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer.

In one embodiment, the laminate film is a base film; An imprinting layer formed on the base film and implementing a hairline; A second cured coating layer formed on the imprinting layer; A metal layer formed on the second cured coating layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer.

In one embodiment, it is installed downstream of the coating means, curing means for curing the adhesive composition at 200 ~ 300 ℃; may further include.

In one embodiment, the coating means may be one selected from the group consisting of a roll coater, a bar coater, a spray coater, and a gravure coater.

In one embodiment, the laminating means may be a lamination roll.

In one embodiment, the laminate roll may be a rubber roll.

In one embodiment, the three-dimensional pattern forming means may be an emboss roll.

In one embodiment, the metal layer may be one selected from the group consisting of a metal deposition layer and a metal coating layer.

In one embodiment, the base film may include one selected from the group consisting of an acrylic resin, a polyester resin, a polyethylene resin, a polypropylene resin, a polystyrene resin, and a combination of two or more of them.

According to an aspect of the present invention, by removing the release layer from the laminate film, the curable coating layer is disposed on the outermost surface of the steel sheet, thereby realizing excellent adhesion, workability and hardness of the PCM steel sheet, as well as the excellent metal of the VCM steel sheet. It can realize a sense, sharpness, and printability.

In addition, according to another aspect of the present invention, by removing the release layer and disposing the imprinting layer on the outermost surface of the remaining steel sheet, a more beautiful three-dimensional texture and sharpness can be realized.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram sequentially illustrating the manufacturing process of the laminate film of Preparation Examples 1 to 3 of the present invention.
2 is a schematic diagram sequentially illustrating the manufacturing process of the laminate film of Preparation Example 4 of the present invention.
3 is a schematic diagram sequentially illustrating the manufacturing process of the laminate film of Preparation Example 5 of the present invention.
4 is a schematic diagram of a system for manufacturing a laminated steel sheet applied to Examples 1 to 3 of the present invention.
5 is a schematic diagram of a layered structure of a laminated steel sheet in each section of FIGS. 4(g)-(i).
6 is a schematic diagram of a system for manufacturing a laminated steel sheet applied to Example 4 of the present invention.
7 is a schematic diagram of a layered structure of a laminated steel sheet in each section of FIGS. 6(g') to (i').
8 is a schematic diagram of a system for manufacturing a laminated steel sheet applied to Example 5 of the present invention.
Fig. 9 is a schematic diagram of a layered structure of a laminated steel sheet in each section of Figs. 8(g˝) to (i˝).
10 is an image of a laminated steel sheet manufactured according to the manufacturing system of FIG. 4. It can be seen that excellent adhesion, processability, and hardness are realized as the cured coating layer, not the base film, is disposed on the outermost edge of the laminated steel sheet. In addition, it can be seen that, as the three-dimensional pattern is formed by the emboss roll, it is possible to implement a pattern having excellent image sharpness and excellent three-dimensional effect.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, this means that other components may be further provided, not excluding other components, unless specifically stated to the contrary.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Laminated steel sheet manufacturing system

A system for manufacturing a laminated steel sheet according to an aspect of the present invention includes immersion means for forming a chemical conversion film layer on the holding steel sheet; A coating means installed downstream of the immersion means and coating an adhesive composition on the chemical conversion film layer; A lamination means 130 installed downstream of the coating means and attaching a laminate film 100 on the adhesive composition; A three-dimensional pattern forming means 140 installed downstream of the laminating means 130 and pressing with an emboss roll on the laminate film to form a three-dimensional pattern; And a release layer removing means 150 installed downstream of the three-dimensional pattern forming means 140 and removing the release layer of the laminate film.

As a non-limiting example of the present invention, the holding steel sheet may be, for example, a zinc-aluminum-silica alloy plated steel plate, a galvanized steel plate in which a zinc or zinc alloy plated layer is formed, such as an electric/hot galvanized steel plate, and in addition to the copper plate , An aluminum plate, a stainless steel plate, etc. may also be used, but the present invention is not limited thereto.

An adhesive layer 70 may be formed by applying an adhesive composition on the holding steel plate 60. The adhesive layer 70 is a layer formed to attach the laminate film 100 to be described later, and the adhesive composition may include a polyester resin or an acrylic resin main resin and a fluorine resin, and the content of the main resin Based on the total weight of the adhesive composition, it may be 80 to 95% by weight. If the content of the main resin is less than 80% by weight, adhesion may be lowered, and if it is more than 95% by weight, the adhesive layer 70 may become harder than necessary and workability may be lowered.

The coating means may be one selected from the group consisting of a roll coater, a bar coater, a spray coater, and a gravure coater. Such coating means can select the type of coater in consideration of the working environment, the process speed, and the use of the final product.

It is installed downstream of the coating means, curing means for curing the adhesive composition at 200 ~ 300 ℃; may further include.

The laminate film 100 includes a base film 10; A first cured coating layer 20 formed on the base film 10; A metal layer 30 formed on the first cured coating layer 20; A printing layer 40 formed on the metal layer 30; And a hot melt layer 50 formed on the printing layer 40.

The base film 10 may be a material suitable for photocuring because the first cured coating layer 20 containing the curable coating composition is formed on the base film 10, and may be transparent, glossy, semi-gloss, or matte. However, it is not limited thereto.

The base film 10 may include one selected from the group consisting of an acrylic resin, a polyester resin, a polyethylene resin, a polypropylene resin, a polystyrene resin, and a combination of two or more of them.

The curable coating composition, based on the total weight of the curable coating composition, urethane (meth) acrylate prepolymer 40 to 65% by weight; 30 to 55% by weight of a solvent; 1 to 3% by weight of a curing initiator; And 0.1 to 1% by weight of a silicone release agent.

The content of the urethane (meth) acrylate prepolymer may be 40 to 65% by weight. If the content of the urethane (meth) acrylate prepolymer is less than 40% by weight, the content of the solvent is relatively increased, so that drying and curing cannot be sufficiently performed, so that the hardness of the laminate film 100 may decrease. When the content of the urethane (meth)acrylate prepolymer is more than 65% by weight, the first cured coating layer 20 is cured more than necessary, and thus processability may be deteriorated.

As a non-limiting example of the present invention, the weight average molecular weight of the urethane (meth) acrylate prepolymer may be 5,000 to 25,000 g/mol. If the weight average molecular weight is less than 5,000 g/mol, the first cured coating layer 20 is cured more than necessary, and thus the workability and adhesion of the laminate film 100 may be deteriorated. When the weight average molecular weight exceeds 25,000 g/mol, mechanical properties such as hardness of the laminate film 100 may be deteriorated. In addition, the average urethane bond per molecule of the urethane (meth)acrylate prepolymer may be 9 to 30, but is not limited thereto.

As a non-limiting example of the present invention, the photoinitiator may be included in the curable coating composition, and the photoinitiator may increase the curing speed when irradiated with ultraviolet rays in a curing step to be described later. The content of the photoinitiator may be 1 to 3% by weight, and if it is less than 1% by weight, the curing speed may be lowered, and if it is more than 3% by weight, the surface of the film may be yellowed, and adhesion and processability may be lowered. . The photoinitiator is 1-hydroxycyclohexylphenylhectone, 2,2-dimethoxy-2phenyl-acetophenone, benzaldehyde, anthraquinone, 3-methylacetophenone, 4-chlorobenzophenone, 4´4-dimethoxybenzophenone , Benzoin propyl ether, benzoin ethyl ether, 1-(4-isopropyl-phenol)-2-hydroxy-2-methylpropan-1-one, thioxanthone, benzophenone, 2,4,6-trimethylbenzoyl -It may be one selected from the group consisting of diphenylphosphine and a mixture of two or more of them, but is not limited thereto. In addition, commercially supplied photoinitiator products are Irgacure184, 651, 500, 819, 907, 1800 (CIBA-GEIGY), Darocure1116, 1173 (MERCK), Lucirine LR8728 (BASF), Micure HP-8, TPO, CP -4, BK-6 (Miwon Corporation) and the like may be used, but are not limited thereto.

As a non-limiting example of the present invention, the silicone release agent may be included in the curable coating composition to impart lubrication and gloss to the surface of the coating layer. In addition, the curable coating composition may further include one selected from the group consisting of antioxidants, light absorbers, light stabilizers, silane coupling agents, thermal polymerization inhibitors, organic pigments, inorganic pigments, smoothing agents, dispersants, antifoaming agents, and combinations of two or more of them. Can include.

As a non-limiting example of the present invention, the thickness of the first cured coating layer 20 may be 1 to 5 μm. If the thickness of the first cured coating layer 20 is less than 1 μm, physical properties such as hardness and image sharpness of the laminate film 100 may be deteriorated, and if it exceeds 5 μm, the film is thickened to reduce adhesion and workability. Can be.

A metal layer 30 may be formed on the first cured coating layer 20. The metal layer 30 may be one selected from the group consisting of a metal deposition layer and a metal coating layer. As used herein, the term "metal layer" is a film layer including a metal component, and includes a metal deposition layer or a metal coating layer. In other words, the metal layer 30 is a term encompassing a layer on which a metal component is deposited or coated, and the metal component may preferably be aluminum. The metal layer 30 may provide a user of the laminated steel sheet with a metallic feel such that the surface of the laminated steel sheet is formed of metal. The thickness of the metal layer 30 may be 1 to 3 μm, if the thickness is less than 1 μm, the metal feeling effect may be insignificant, and if it exceeds 3 μm, the adhesion of the film may be deteriorated.

In the laminate film 100, by inserting one or more layers in which an imprinting pattern is implemented between the base film 10 and the metal layer 30, the appearance and image quality may be implemented more beautifully.

For example, the laminate film 100 may include a base film 10; An imprinting layer 21 formed on the base film 10 and implementing a hairline; A metal layer 30 formed on the imprinting layer 21; A printing layer 40 formed on the metal layer 30; And a hot melt layer 50 formed on the printing layer 40.

In addition, the laminate film 100 includes a base film 10; An imprinting layer 21 formed on the base film 10 and implementing a hairline; A second cured coating layer 22 formed on the imprinting layer 21; A metal layer 30 formed on the second cured coating layer 22; A printing layer 40 formed on the metal layer 30; And a hot melt layer 50 formed on the printing layer 40.

The printing layer 40 may be formed by applying a paint composition to the metal layer 30. The printing layer 40 refers to a coating layer composed of 1 to 10 degrees of gravure coating in order to implement a real-life image.

A hot melt layer 50 may be formed by applying a thermoplastic resin composition on the printing layer 40. In general, a hot melt is a heat-melting adhesive that does not contain water or solvent at all, but includes only a thermoplastic resin and melts at a high temperature above the melting point, is applied to an adherend, and then cooled and solidified, thereby giving an adhesive effect. The thermoplastic resin composition may be a thermoplastic resin, and in detail, one selected from the group consisting of a polyamide resin, a polyester resin, a polyurethane resin, a polyethylene resin, a polypropylene resin, an ethylene vinyl acetate resin, and a mixture of two or more thereof. However, it is not limited thereto.

The laminating means 130 may be a laminate roll, and the laminate roll may be a rubber roll. The laminating means 130 may include an upper roll 131 and a lower roll 132. The laminating means 130 may be laminated and attached on the hot melt layer 50 of the laminate film 100 transferred from the film supply means 120 and the adhesive layer 70 of the steel sheet.

The upper roll 131 and the lower roll 132 may be metal or rubber, but a rubber roll is more preferable. The laminating means 130 may press the upper and lower portions of the steel plate at the same time or at the same time as the upper roll 131 and the lower roll 132, and applying excessive pressure may cause damage to the exterior. The material of the rubber roll may be one selected from natural rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, ethylene propylene rubber, chlorosulfonated polyethylene rubber, acrylic rubber, fluorine rubber and silicone rubber. , But is not limited thereto.

The three-dimensional pattern forming means 140 may be an embossing roll. The three-dimensional pattern forming means 140 may include an upper roll 141 and a lower roll 142. The upper roll and the lower roll may form a three-dimensional pattern by applying pressure at the same time or at the same time. The area, depth, and width of the three-dimensional pattern may be different depending on the pressure applied by the emboss roll and whether the upper roll and the lower roll are applied simultaneously or at the same time.

The pressure applied by the emboss roll may be 30 to 60 bar, and if the applied pressure is less than 30 bar, the three-dimensional pattern may be insufficiently formed, and if it exceeds 60 bar, the laminate film attached to the steel plate may be damaged. I can.

The release layer of the laminate film 100 may be removed by the release layer removing means 150. As used herein, the term "release layer" refers to a layer removed by the release layer removing means 150 among a plurality of films constituting the laminate film 100. That is, the release layer is at least one film, the base film 10, the first cured coating layer 20, the second cured coating layer 22, the imprinting layer 21, the metal layer 30 ), the printing layer 40, the hot melt layer 50, and may be one selected from the group consisting of a combination of two or more of them, preferably, the base film 10, or the base film 10 and imprinting It may be the layer 21, but is not limited thereto.

By removing the release layer, the first cured coating layer 20, the imprinting layer 21, or the second cured coating layer 22 may be positioned on the outermost edge of the finally manufactured laminated steel sheet. The thickness of the first cured coating layer 20, the imprinting layer 21, or the second cured coating layer 22 may be 1 to 5 μm. If the thickness of the first cured coating layer 20, the imprinting layer 21, or the second cured coating layer 22 is less than 1 μm, physical properties such as hardness and image sharpness of the laminated steel sheet may be deteriorated. If it exceeds µm, the steel sheet is thickened, and adhesion and workability may deteriorate. Accordingly, the laminated steel sheet finally manufactured can be seen in FIG. 10.

6 and 7, the laminated steel sheet of one aspect of the present invention may have an imprinting layer 21 formed on the outermost side thereof. In detail, the laminate film 100 manufactured according to FIG. 2 is laminated and attached on the adhesive layer 70, a three-dimensional pattern is formed by an emboss roll, and then the laminate by the release layer removing means 150 When the base film 10 of the film 100 is removed, finally, a laminated steel sheet having the layered structure of FIG. 7(i') can be manufactured.

In the laminated steel sheet having the layered structure of Fig. 7(i'), an imprinting pattern is formed under the imprinting layer 21 forming the outermost, and a three-dimensional pattern is formed by an emboss roll on the upper part, As the light irradiated from the outside causes an interference phenomenon, it is possible to realize a three-dimensional pattern that is excellent in sharpness and beautiful in the end.

Referring to FIGS. 8 and 9, the laminated steel sheet of one aspect of the present invention may include a second cured coating layer 22 on the outermost side. Specifically, the laminate film 100 manufactured according to FIG. 3 can be laminated and attached on the adhesive layer 70, and a three-dimensional pattern is formed by an emboss roll, and then by the release layer removing means 150 Not only the base film 10 but also the imprinting layer 21 may be removed at the same time. Finally, a laminated steel sheet having a layered structure of Fig. 9(i˝) can be manufactured.

The laminated steel sheet having the layered structure of Fig. 9(i˝) has a UV (ultraviolet) imprinting pattern formed on the outermost second cured coating layer 22, so a simple imprinting layer 21 Beautiful three-dimensional texture that could not have been implemented in can be realized. And, by superimposing a new three-dimensional pattern by the emboss roll, it is possible to implement a more precise pattern.

Meanwhile, the laminated steel sheet may be performed in a continuous roll-to-roll line. In the case of a discontinuous process such as a conventional sheet method, a plate-like steel plate having a certain size is arranged on a coating process line using a conveyor system, and the plate-like steel plate is coated and dried in each process step. By doing so, it is possible to manufacture a sheet-shaped steel sheet. However, in the discontinuous process, productivity may decrease in proportion to the interval between sheets, and storage efficiency during product storage and transportation efficiency during product shipment may decrease.

On the other hand, in the case of a continuous process, the holding steel sheets in a form that is not separated from each other to have a certain size and is continuously connected pass through each process facility or step of the continuous line, and the finished product is wound in a roll form. Can be stored. Accordingly, the continuous process has superior productivity compared to the conventional discontinuous process, and can greatly improve storage efficiency and transportation efficiency.

Hereinafter, an embodiment of the present invention will be described in detail.

Manufacturing Example 1

Polyethylene terephthalate (PET) based on the total weight of the composition on the base film, including 50% by weight of a urethane (meth)acrylate prepolymer, 46.9% by weight of a solvent, 2% by weight of a photoinitiator, 0.1% by weight of a silicone release agent, and 1% by weight of an additive. The curable paint composition was applied. Thereafter, the base film to which the curable coating composition was applied was hot-air dried at 90° C. for 30 seconds and then irradiated with UV rays of 250 mJ/cm 2 to form a first cured coating layer having a thickness of 3 μm.

A laminate film was manufactured by sequentially laminating a metal layer containing aluminum, a printing layer, and a hot melt layer on the formed first cured coating layer.

Manufacturing Example 2

Except for using a curable coating composition comprising 50% by weight of a urethane (meth)acrylate prepolymer, 46.7% by weight of a solvent, 2% by weight of a photoinitiator, 0.3% by weight of a silicone release agent, and 1% by weight as an additive based on the total weight of the composition. A laminate film was prepared in the same manner as in Preparation Example 1.

Manufacturing Example 3

Except for using a curable coating composition containing 50% by weight of a urethane (meth)acrylate prepolymer, 46.5% by weight of a solvent, 2% by weight of a photoinitiator, 0.5% by weight of a silicone release agent, and 1% by weight as an additive based on the total weight of the composition A laminate film was prepared in the same manner as in Preparation Example 1.

Manufacturing Example 4

A curable coating composition including a solvent-free silicone release agent was applied on a polyethylene terephthalate (PET) base film. Thereafter, after hot air drying the base film coated with the curable paint composition at 90° C. for 30 seconds, irradiation with 250 mJ/㎠ of ultraviolet rays and pressing with a master mold having a transparency of 85%, the imprinting layer with a hairline was formed. Formed.

A laminate film was manufactured by sequentially laminating a metal layer containing aluminum, a printing layer, and a hot melt layer on the formed imprinting layer.

Manufacturing Example 5

A curable coating composition including a solvent-free silicone release agent was applied on a polyethylene terephthalate (PET) base film. Thereafter, after hot air drying the base film coated with the curable paint composition at 90° C. for 30 seconds, irradiation with 250 mJ/㎠ of ultraviolet rays and pressing with a master mold having a transparency of 85%, the imprinting layer on which the hairline was implemented was formed. Formed.

A curable coating composition including 50% by weight of a urethane (meth)acrylate prepolymer, 47% by weight of a solvent, 2% by weight of a photoinitiator, and 1% by weight of an additive was applied on the imprinting layer based on the total weight of the composition. Thereafter, the base film to which the curable coating composition was applied was hot-air dried at 90° C. for 30 seconds and then irradiated with UV rays of 250 mJ/cm 2 to form a second cured coating layer having a thickness of 3 μm.

Comparative Production Example 1

A laminate film was prepared in the same manner as in Preparation Example 1, except that a curable coating composition containing no silicone release agent was used.

Comparative Production Example 2

A laminate film was prepared in the same manner as in Preparation Example 1, except that a curable coating composition having a silicone release agent content of 3% by weight was used.

Comparative Production Example 3

A laminate film was manufactured in the same manner as in Preparation Example 1 except that the thickness of the coating layer was adjusted to 0.5 μm.

Comparative Production Example 4

A laminate film was manufactured in the same manner as in Preparation Example 1 except that the thickness of the coating layer was adjusted to 5 μm.

Example 1

After immersing GI (melted galvanized steel sheet) in a chromate-based solution to form a chemical conversion film layer having an area density of 80 mg/m2, an adhesive composition having a polyester content of 95% by weight based on the total weight of the composition was applied, and then the first It was coated with a roll coater to form an adhesive layer having a thickness of 10 μm. After laminating the laminate film of Preparation Example 1 on the adhesive layer using a laminate roll, a three-dimensional pattern was formed using an emboss roll, and then the PET base film located at the outermost part of the laminate film was removed using a release layer removing means. Removed to obtain a laminated steel sheet.

Example 2

A laminate steel sheet was obtained in the same manner as in Example 1, except that the laminate film of Preparation Example 2 was attached.

Example 3

A laminate steel sheet was obtained in the same manner as in Example 1, except that the laminate film of Preparation Example 3 was attached.

Example 4

A laminate steel sheet was obtained in the same manner as in Example 1, except that the laminate film of Preparation Example 4 was attached.

Example 5

A laminated steel sheet was obtained in the same manner as in Example 1, except that the laminate film of Preparation Example 5 was attached and the PET base film and the imprinting layer of the laminate film were removed by means of removing the release layer.

Comparative Example 1

A laminate steel sheet was manufactured in the same manner as in Example 1, except that the laminate film of Comparative Preparation Example 1 was attached.

Comparative Example 2

A laminate steel sheet was manufactured in the same manner as in Example 1, except that the laminate film of Comparative Preparation Example 2 was attached.

Comparative Example 3

A laminate steel sheet was manufactured in the same manner as in Example 1, except that the laminate film of Comparative Preparation Example 3 was attached.

Comparative Example 4

A laminate steel sheet was manufactured in the same manner as in Example 1, except that the laminate film of Comparative Preparation Example 4 was attached.

Comparative Example 5

A laminate steel sheet was manufactured in the same manner as in Example 1, except that a PET film was positioned at the outermost part including a commercially available laminate film.

Comparative Example 6

A commercially available steel plate (Sigma Samsung Coating, Z367) coated with oily top clear was set as a comparative example.

Experimental Example 1: Evaluation of physical properties of a laminated steel sheet according to the composition of the curable coating composition

In order to evaluate the releasability and coatability of the laminated steel sheets prepared in Examples 1 to 5 and Comparative Examples 1 to 6 including laminate films having different compositions of the curable coating composition, a test piece of 50 mm X 100 mm, t: 0.5 mm was prepared. It was prepared, measured and evaluated by the following method, and the results are shown in Table 2 below.

-Releasability: After drawing 10 squares at 1mm intervals, width x length on the test piece, visually check whether the film is peeled off.

-Coating property: Visually check the appearance of the manufactured laminated steel sheet

division Dysplasia Coating properties Example 1 ○ ○ Example 2 ◎ ◎ Example 3 ○ ○ Example 4 ◎ ◎ Example 5 ◎ ◎ Comparative Example 1 X △ Comparative Example 2 ○ X Comparative Example 3 △ X Comparative Example 4 X △ Comparative Example 5 X △ Comparative Example 6 △ X

(◎: excellent, ○: good, △: normal, X: poor)

Referring to Table 2, the laminated steel sheets of Examples 1 to 5 were found to be remarkably superior in all physical properties compared to Comparative Examples 1 to 6, and in particular, Examples including the laminate films of Preparation Examples 2, 4 and 5 Laminated steel sheets of 1 to 3 are shown to have the best properties in all properties, so it can be expected that the properties of the laminated steel sheet can be effectively implemented.

Experimental Example 2: Evaluation of physical properties of laminated steel sheet

In order to evaluate the physical properties of the laminated steel sheets of Examples 1 to 5 and Comparative Examples 1 to 6, a test piece of 50 mm X 100 mm, t: 0.5 mm was prepared according to an embodiment of the present invention. Measurement and evaluation were performed, and the results are shown in Table 3 below.

-Seonyeongseong: The apparent degree of the steel plate is visually confirmed without distortion.

-Three-dimensional texture: Visually check the clarity and beauty of the three-dimensional texture on the exterior surface of the steel plate.

-Processability: T-banding at room temperature (20℃) to evaluate the occurrence of cracks in the processed area

-Adhesion: After drawing 10 squares at 1mm intervals, width x length, and sticking with a scotch tape, instant peeling is performed to check the presence or absence of peeling of the coating film.

-Hardness: Check whether the coating film is damaged when a certain amount of pressure is applied.

-Alkaline resistance: After immersion in 5% NaCl, 5% NaOH solution for 240 hours, visually check the appearance of the coating film

-Scratch resistance: When the surface of the coating film is scratched with a fingernail, the degree of ƒJ strength is visually identified.

division Yeongseong Sun Three-dimensional texture Processability Adherence Hardness Alkali resistance Scratch resistance Example 1 ○ ○ ◎ ○ ○ ◎ ◎ Example 2 ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 3 ○ ○ ◎ ○ ◎ ○ ◎ Example 4 ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 5 ◎ ◎ ◎ ◎ ◎ ○ ◎ Comparative Example 1 X X X △ X △ X Comparative Example 2 △ X X X △ X △ Comparative Example 3 X X △ X X X △ Comparative Example 4 X X X △ △ X X Comparative Example 5 ○ △ X X X △ X Comparative Example 6 △ ○ △ X X ○ X

(◎: excellent, ○: good, △: normal, X: poor)

Referring to Table 3, the laminated steel sheets of Examples 1 to 5 were found to be remarkably superior in all physical properties compared to Comparative Examples 1 to 6, and in particular, Example 2 including the laminate films of Preparation Examples 2, 4 and 5 , 4, and 5 were found to be the most excellent.

Through this, when the laminated steel sheet according to an embodiment of the present invention is applied to the final product, the advantages of the VCM steel sheet, such as metal feel, sharpness, printability, and workability, adhesion, and hardness, which are the advantages of the PCM steel sheet, can be simultaneously realized. Can be seen.

In addition, it was confirmed that the laminate films of Preparation Example 4 and Preparation Example 5 included an imprinting pattern, so that when applied to a laminated steel sheet, excellent image sharpness and a beautiful three-dimensional texture could be realized.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

10: base film
20: first cured coating layer
21: imprinting layer
22: second cured coating layer
30: metal layer
40: printed layer
50: hot melt layer
60: holding steel plate
70: adhesive layer
100: laminate film
110: adhesive layer forming means
120: film supply means
130: laminating means
131, 132: upper roll, lower roll
140: three-dimensional pattern forming means
141, 142: upper roll, lower roll
150: release layer removal means

Claims (11)

Immersion means for forming a chemical conversion film layer on the holding steel plate;
A coating means installed downstream of the immersion means and coating an adhesive composition on the chemical conversion film layer;
A lamination means installed downstream of the coating means and for attaching a laminate film on the adhesive composition;
A three-dimensional pattern forming means installed downstream of the laminating means and pressing on the laminate film with an emboss roll to form a three-dimensional pattern; And
A release layer removing means provided downstream of the three-dimensional pattern forming means and removing the release layer of the laminate film; and
The laminate film is one selected from the following first laminate film to third laminate film, the production system of the laminate steel sheet:
The first laminate film is a base film; A first cured coating layer formed on the base film; A metal layer formed on the first cured coating layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer,
The second laminate film is a base film; An imprinting layer formed on the base film and implementing a hairline; A metal layer formed on the imprinting layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer,
The third laminate film is a base film; An imprinting layer formed on the base film and implementing a hairline; A second cured coating layer formed on the imprinting layer; A metal layer formed on the second cured coating layer; A printing layer formed on the metal layer; And a hot melt layer formed on the printing layer. delete delete delete The method of claim 1,
A system for manufacturing a laminated steel sheet further comprising a; curing means installed downstream of the coating means and curing the adhesive composition at 200 to 300°C. The method of claim 1,
The coating means is one selected from the group consisting of a roll coater, a bar coater, a spray coater, and a gravure coater. The method of claim 1,
The laminating means is a laminate roll, a system for manufacturing a laminated steel sheet. The method of claim 7,
The laminate roll is a rubber roll, a system for manufacturing a laminate steel sheet. The method of claim 1,
The three-dimensional pattern forming means is an emboss roll, a system for manufacturing a laminated steel sheet. The method of claim 1,
The metal layer of the second laminate film is one selected from the group consisting of a metal deposition layer and a metal coating layer. The method of claim 1,
The base film of the second laminate film comprises one selected from the group consisting of an acrylic resin, a polyester resin, a polyethylene resin, a polypropylene resin, a polystyrene resin, and a combination of two or more of them. system.

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