KR102321939B1 - Laminate deco film for steel sheet having high elongation formability and bond performance - Google Patents

Abstract

The present invention relates to a steel sheet laminate decorative film having excellent high elongation molding and cutting adhesiveness, which specifically comprises: a lower layer part provided as a film made of a PET material and having a structure with a lower surface in contact with one region of an outer surface of a steel sheet; a middle layer part formed on an upper surface of the lower layer part and forming a printed layer to implement a decoration element comprising at least one of a color, a texture, and a pattern; and an upper layer part formed on an upper surface of the middle layer part and forming a surface of a decorative film, wherein the steel sheet laminate decorative film having excellent high elongation molding and cutting adhesiveness, has a structure in which the lower layer part, the middle layer part, and the upper layer part are thermally fused in order to be laminated.

Description

Steel sheet lamie decoration film with excellent high-elongation forming and cutting adhesion

The present invention relates to a steel sheet lamina decoration film having excellent high-elongation molding and cutting adhesion, specifically, a three-dimensional protruding appearance, a color metal layer, and a PET layer with a thermal bonding function. As a related matter, it relates to a PVC film and a steel plate Lamy decor film that does not use a steel plate adhesive.

In general, in order to express the appearance and patterns of various colors and textures on the exterior of home appliances, a VCM film is prepared, and an adhesive is coated on a galvanized steel sheet, heated and pressed to complete the VCM color steel sheet.

This VCM color steel sheet can be understood as a concept in which PET or PVC film printed with various colors and patterns is adhered to the steel sheet. It has the advantage of being excellent.

Meanwhile, as a related prior art, looking at Korean Patent Application Laid-Open No. 10-2008-0058123 (a home appliance, a front cover coupled to a home appliance, and a manufacturing method of the front cover), forming, punching or drawing on a steel plate in which a pattern is expressed Even if the same process is performed, a front cover related technology in which a pattern is reduced or damaged is disclosed.

More specifically, in the prior art described above, a PVC film is provided between steel sheets having a small elongation, such as a decor film, during drawing processing of the front cover, thereby preventing peeling and damage of the decor film.

In other words, PVC film is a composition that is essential to secure the moldability of the front cover when forming the exterior of home appliances including washing machines and refrigerators. As it is revealed that it causes serious harm to the human body and environmental pollution, the regulations on the use of PVC films are becoming stricter. Accordingly, the active development of decorative films that can be used for exteriors of home appliances and the like is required to replace PVC films.

Accordingly, the present invention has a first object to provide a steel sheet lamina decoration film that is easy to form a high elongation without the use of a PVC film, which is an environmental problem.

In addition, the present invention is a steel sheet laminate decoration film that minimizes the problem of peeling from the steel sheet while maintaining the formability of the conventionally used PVC film by laminating the steel sheet and the decorative film at a high temperature when forming the steel sheet forming the exterior of the home appliance. A second purpose is to provide

In order to achieve the above object, according to an embodiment of the present invention, a steel sheet ramie decorative film having excellent high elongation molding and cutting adhesion is provided with a film of PET material, and has a structure in which the lower surface is in contact with one area of the outer surface of the steel sheet. lower level; a middle layer forming a printed layer on the upper surface of the lower layer to implement a decorative element including at least one of color, texture and pattern; And, the upper layer is formed on the upper surface of the middle layer, so as to form the surface of the decorative film; Containing, the steel sheet lamina decorative film excellent in high elongation forming and cutting adhesion, the lower layer, the middle layer and the upper layer are heat-sealed and laminated It is characterized in that it has

The above-mentioned upper layer part, after applying a resin material including at least one of a thermoplastic resin and a photocurable resin on the upper surface of the middle layer part, so that a three-dimensional pattern is formed by imprinting, and ultraviolet rays in the area where the three-dimensional pattern is formed It is preferable to irradiate it to form an imprinting layer.

In addition, the above-mentioned intermediate layer further comprises an upper primer layer formed on the upper surface of the printed layer, and a lower primer layer formed on the lower surface of the printed layer, wherein the upper primer layer and the lower primer layer are urethane, polyester and, A material comprising at least one of a urethane-polyester mixture is preferably used.

In addition, on the lower surface of the lower layer described above, in order to impart adhesion to the surface of the steel sheet, a hot-melt resin layer using a material containing at least one of a polyester-based resin and a polyamide-based resin as a raw material is further formed. desirable.

In addition, the above-mentioned high-elongation forming and cutting adhesion of the steel sheet ramie decorative film excellent, by heating the surface temperature of the steel sheet to which the steel sheet lamy decorative film excellent in high elongation forming and cutting adhesion is applied to a temperature of 180 to 220 degrees, on the surface of the steel sheet It is preferable to achieve mutual thermal fusion by using the thermal energy conducted to the lower layer, the middle layer, and the upper layer.

In addition, it is preferable that the above-described high-elongation forming and cutting adhesion of the steel sheet ramie decorative film excellent in adhesion is 20 to 40 micrometers (um) before thermal fusion, the thickness of the lower layer, the middle layer, and the upper layer.

In addition, the steel sheet to which the above-described high-elongation forming and cutting adhesion is excellent, the lamie decor film is applied. is preferably provided with a thickness of 0.5 to 1.0 millimeters (mm).

According to an embodiment of the present invention, there is an effect that it is possible to provide a steel sheet lamina decoration film that is easy to form at high elongation without the use of a PVC film, which is a problem of various environmental problems such as emission of environmental hormones.

In addition, according to an embodiment of the present invention, in order to apply a PVC film to a conventional steel sheet, a process of laminating at least four layers with a steel sheet-adhesive layer-PVC film-PET film, etc. was required, but in the present invention, the steel sheet-bone With the decoration film of the present invention, it is possible to provide a decoration film capable of achieving the same physical properties and effects only by laminating only two layers, thereby improving the production yield and reducing the manufacturing cost.

In addition, according to an embodiment of the present invention, the PET film of the lower layer, which is directly attached to the steel sheet, performs the role of heat sealing to extend the lifespan of the steel sheet, as well as the middle layer located on the upper surface of the lower layer and the adhesive strength with the upper layer In addition, since it is excellent and prevents peeling from the steel sheet, there is an effect that it is possible to improve the quality of the product using the high-elongation forming and cutting adhesiveness of the steel sheet laminae deco film of the present invention.

In addition, according to an embodiment of the present invention, by preventing discoloration and deformation of the printed layer in which the color, material and pattern are implemented by the upper/lower primer layer, it is possible to maintain the unique beauty provided by the decor film for a long time. It works.

In addition, according to an embodiment of the present invention, since various three-dimensional patterns are transferred to the imprinting layer forming the uppermost surface of the decor film, when applied to home appliances, the material is expressed differently depending on the shape of the three-dimensional pattern It has the effect of being able to provide a decorative film that can be widely applied, such as giving a unique aesthetic feeling.

1 is a view showing a schematic cross-sectional view of the configuration of a steel sheet lamina decorative film excellent in high elongation forming and cutting adhesion according to an embodiment of the present invention.
Figure 2 is a view schematically showing an example in which the imprinting layer is formed on the uppermost surface of the steel sheet lamina decorative film excellent in high elongation molding and cutting adhesion according to an embodiment of the present invention.
3 is a view showing an example of forming an imprinting layer according to an embodiment of the present invention.
4 is a view showing a detailed shape of the middle layer according to an embodiment of the present invention.
5 is a view showing a detailed shape of a lower layer according to an embodiment of the present invention.
6 is a view schematically showing a process of thermally fusion of a steel sheet lamina decorative film excellent in high elongation forming and cutting adhesion to a steel sheet according to an embodiment of the present invention.

Hereinafter, various embodiments and/or aspects are disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of one or more aspects. However, it will also be recognized by one of ordinary skill in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain illustrative aspects of one or more aspects. These aspects are illustrative, however, and some of the various methods in principles of the various aspects may be employed, and the descriptions set forth are intended to include all such aspects and their equivalents.

As used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. may not be construed as an advantage or an advantage in any aspect or design described herein over other aspects or designs. .

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. should be understood as not

Also, terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are those commonly understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in an embodiment of the present invention, an ideal or excessively formal meaning is not interpreted as

The present invention relates to a steel sheet lamina decoration film having excellent high elongation molding and cutting adhesion, and the present invention is to provide a steel sheet lamina decoration film that is easy to form high elongation without the use of a PVC film, which is an environmental problem. It has a purpose, and when forming the steel sheet that forms the exterior of home appliances, heat-treating the steel sheet and the decorative film at high temperature for lamination to maintain the formability of the conventionally used PVC film while minimizing the problem of peeling from the steel sheet. A second purpose is to provide

As a description of the present invention for achieving the above object, the present invention will be described in more detail below with reference to the accompanying drawings, and a plurality of drawings to explain one or more technical features or components constituting the invention This could be a simultaneous reference.

Specifically, the high-elongation forming and cutting-adhesive steel sheet lamie decorative film of the present invention is a decorative film applied to the steel sheet forming the exterior of home appliances, including washing machines and refrigerators, and imparts color, texture and pattern sense to home appliances. Thus, it can be understood as a concept of a finishing material that provides a beautiful appearance while increasing durability and physicochemical stability.

On the other hand, referring to FIG. 1 in order to examine the detailed structure of the steel sheet lamina decoration film having excellent high elongation forming and cutting adhesion as mentioned in the present invention, in FIG. 1 , high elongation forming and cutting adhesion according to an embodiment of the present invention is shown. It can be seen that an example of a cross-sectional schematic diagram of an excellent steel sheet lamina decoration film is shown.

As shown in A of FIG. 1, the steel sheet lamie decorative film excellent in high elongation forming and cutting adhesion of the present invention has its structure largely divided into a lower layer portion 10, a middle layer portion 20 and an upper layer portion 30.

At this time, if a more detailed description of the lower layer portion 10 described above is continued with reference to FIG. 5 , the lower layer portion 10 of the present invention is provided with a film 11 made of PET material, and the lower surface is a steel plate 1 . It can be understood as a region consisting of a structure in contact with one region of the surface of the .

Preferably, in order to impart adhesion to the surface of the steel sheet 1 on the lower surface of the lower layer portion 10 as described above, a hot-melt resin layer using a material containing at least one of a polyester-based resin and a polyamide-based resin as a raw material. This may be further formed.

That is, the hot melt resin layer used in the present invention provides adhesion to the steel sheet 1 and the lower layer portion 10, and, as described above, is cooled and solidified within a few seconds, so that a separate drying process is unnecessary, thereby simplifying the production process. It is possible to provide the effect of reducing the manufacturing cost.

At this time, as the raw material for the above-mentioned hot melt resin layer, in the above-mentioned embodiment, the polyester resin and polyamide-based resin that exhibit adhesive properties by the resin alone have been described, but other embodiments of the present invention are limited. In the present invention, materials including ethylene-vinyl acetate (EVA) and styrenic block copolymers that form the properties of a hot melt resin by mixing with other compositions may be used, but the present invention is not limited thereto.

Returning to FIG. 1 and continuing the description of the present invention, in the present invention, a printed layer is formed on the upper surface of the above-described lower layer 10 to implement a decorative element including at least one of color, texture and pattern, and The middle layer portion 20 is included.

For a more detailed description of this, reference will be made simultaneously to FIG. 4 showing the detailed shape structure of the middle layer 20 .

1 and 4, the middle layer portion 20 of the present invention includes an upper primer layer 211 formed on the upper surface of the printed layer, and a lower primer layer 212 formed on the lower surface of the printed layer. It is preferable to include

At this time, the formation of the primer layer on the upper / lower surface of the printed layer increases the adhesion between the middle layer portion 20, the upper layer portion 30 and the lower layer portion 10, on which the printed layer is formed, while preventing discoloration / deformation of the printed layer. It may be understood as a configuration to prevent it.

For this purpose, the upper primer layer 211 and the lower primer layer 212 described above use a material containing at least one of urethane, polyester, and a urethane-polyester mixture to increase the durability of the printed layer. This would be preferable.

In addition, in a more preferred embodiment of the present invention, in implementing decorative elements such as patterns and patterns expressing various colors and materials in the printing layer, a processing process of printing on a PET film may be generally performed, but preferably metal ink Gravure such as micronizing and color ink into nano-sized particles, filling them in a gravure cylinder, and printing with pressure with a pressure roller, or putting ink on an offset pad and printing on PET film. It may be possible to implement the above-described decorative elements using a Gravure Printing method.

To this end, in the present invention, a pattern mask for separating the applied/non-applied areas of the metal ink and the color ink in forming the printed layer may be used, and in the present invention, due to the implementation method of the printed layer, it is translucent and unique to the metal It has the effect of being able to perform an exterior expression that maximizes the glossiness of the

In addition, in another embodiment of the present invention, when the metal ink and the color ink are finely divided into nano-scale particles and used, a spin coating method using centrifugal force is used so that the ink can be uniformly applied to the printing layer without any unevenness. Also, the present invention is not limited thereto.

Continuing the description with reference to FIG. 1 again, in the present invention, the upper layer portion 30 is formed on the upper surface of the aforementioned middle layer portion 20 to form the surface of the decorative film, and may include the upper layer portion 30 .

At this time, the above-described upper layer 30 is a resin material containing at least one of a thermoplastic resin and a photocurable resin is applied to the upper surface of the middle layer 200, and then a three-dimensional pattern is formed by imprinting, It can be understood to be formed as an imprinting layer by irradiating ultraviolet rays to the region where the three-dimensional pattern is formed, which will be described in more detail with reference to the drawing shown in FIG. 2 .

Referring to FIG. 2A, in A, it can be seen that the above-described resin material for forming a three-dimensional pattern is applied to the upper surface of the middle layer portion as described above, and a patterning mask 300 that determines the shape of the three-dimensional pattern. can be seen that it is ready.

Specifically, the above-described patterning mask 300 is pressed to the upper surface of the resin material and overlapped in the form shown in B of FIG. By curing the applied resin material with UV (using a wavelength of 200 to 400 nm), an imprinting layer in which a three-dimensional pattern is transferred as the upper layer part 30 on the upper surface of the middle layer part 20 as shown in FIG. 2C can be formed. there will be

In addition, referring further to the drawing shown in FIG. 3, in FIG. 3A, an imprinting layer to which a three-dimensional pattern is transferred is formed on the upper surface of the middle layer 20 to form a cross-sectional view of the structure constituting the upper layer, In FIG. 3B , a plan view of the imprinting pattern of the upper layer part 30 on which the three-dimensional pattern is formed can be seen from above.

That is, in the present invention, it should be understood that the upper layer part 30 formed on the upper surface of the middle layer part 20 forms an imprinting layer in which an embossing pattern of a concave and convex shape is formed using a resin material. As the imprinting layer is included, a three-dimensional effect is given to the decorative film used as a finishing material for home appliances, thereby providing a decorative film with increased aesthetics.

In addition, in the present invention, as the above-described upper layer 30 is composed of a resin material imprinting layer, cracking due to surface curvature is prevented, and physical properties and functions are used even when a high temperature is used when bonding to the steel sheet 1 . There is an effect that it is possible to provide a steel sheet lamina decoration film excellent in high elongation forming and cutting adhesion without deterioration of the .

Meanwhile, in the above description, it is preferable that the three-dimensional pattern is not specified in the form shown in FIGS. 2 and 3, and it may be changed and applied to various types of patterns such as a wave pattern, a dot pattern, and a zigzag pattern.

Accordingly, in the present invention, it is possible to implement various colors, as well as to express various textures by a three-dimensional pattern, so that a wide range of applications is possible.

Returning to FIG. 1 again, the steel sheet ramie decorative film excellent in high elongation forming and cutting adhesion of the present invention including the above-described components is a steel sheet 1 to which the decoration film is attached as shown in B of FIG. It is preferable that the lower layer portion 10 - the middle layer portion 20 - the upper layer portion 30 are arranged in the order, and then thermally fused to form a laminated structure.

In this case, the above-described laminated structure may be understood to mean a structure in which the lower layer portion 10, the middle layer portion 20, and the upper layer portion 30 are deposited without being separated from each other.

On the other hand, the steel sheet (1) to which the high-elongation forming and cutting adhesiveness of the steel sheet excellent in cutting adhesion is applied is an ABS sheet, a VCM steel sheet, and a hot-dip galvanized steel sheet among the steel sheets (1) applied to the exterior of general home appliances. , it will be preferable to use a steel sheet 1 comprising at least one of an electrogalvanized steel sheet and a nickel-plated steel sheet, and the thickness of the steel sheet 1 is 0.5 to 1.0 millimeters, most preferably 0.7 to 0.8 millimeters. will be able to use

At this time, limiting the type of the steel sheet 10 to the above-described type of steel sheet 1 is to apply a high-elongation forming and cutting-adhesive steel sheet lamina decorative film to the steel sheet 1 through a heat treatment process of 180 to 220 degrees. Accordingly, it may be understood that the use of the steel sheet 1 of a material that does not affect the generation of harmful gases or the physicochemical stability of the decorative film of the present invention even at high temperatures.

In addition, the steel sheet ramie decorative film having excellent high elongation forming and cutting adhesion applied to the steel sheet 1 of this thickness, before thermal fusion, the lower layer portion 10, the middle layer portion 20 and the upper layer portion 30 have a total thickness of 20 It is preferable to have a thickness in the range of 40 micrometers to 40 micrometers, and most preferably, it may have a thickness in the range of 25 to 36 micrometers.

At this time, the thickness before thermal fusion of the steel sheet ramie decorative film excellent in high elongation forming and cutting adhesion is compared to the thickness of the above-described steel sheet 1 during stretch forming by thermal fusion, the lower layer 10, the middle layer ( 20) and the upper layer part 30 will be understood to be a thickness that prevents separation from each other, and the lower layer part 10, the middle layer part 20 and the upper layer part 30 may be provided with equal thickness within the above-described range, but There may be a difference in thickness between the lower layer portion 10, the middle layer portion 20, and the upper layer portion 30 within one range, but the present invention is not limited thereto.

On the other hand, an example of thermal fusion of a steel sheet lamy decor film having excellent high elongation forming and cutting adhesion can be seen in FIG. The surface temperature of 1) is heated to a temperature of 180 to 220 degrees, and the steel sheet 1 and , the lower layer portion 10 - the middle layer portion 20 - the upper layer portion 30 can be thermally fused.

At this time, it will be understood that the means for heating the steel sheet 1 may be made through a heating means including a hot press machine.

That is, according to this, in the present invention, the decorative film composed of the lower layer portion 10, the middle layer portion 20 and the upper layer portion 30 can be easily adhered to the steel plate 1 without forming a separate adhesive layer on the decorative film. There are advantages.

In particular, in the present invention, the PET film of the lower layer, which is directly bonded to the steel sheet, performs the role of heat sealing to extend the life of the steel sheet, and also has excellent adhesion with the middle layer and the upper layer located on the upper surface of the lower layer. Since it prevents the peeling phenomenon from occurring, there is an effect that it is possible to improve the quality of the product using the high-elongation forming and cutting adhesion of the steel sheet laminae decorative film of the present invention.

Furthermore, the manufacturing process is simple compared to the conventionally used PVC film, but it is sustainable in that it provides the same level of physical properties as the PVC film and provides an environmentally friendly decorative film compared to the PVC film. It has the effect of being able to contribute to future industrial development.

Overall, according to an embodiment of the present invention, there is an effect that it is possible to provide a decorative film that can be used as a replacement for the PVC film, which has emerged as various environmental problems such as the discharge of environmental hormones.

In addition, according to an embodiment of the present invention, in order to apply a PVC film to the conventional steel sheet 1, a process of laminating at least four layers with a steel sheet 1-adhesive layer-PVC film-PET film, etc. was required, but this In the present invention, a decorative film that can improve production yield and reduce manufacturing costs by realizing equivalent physical properties and effects only by laminating only two layers with a steel sheet (1)-deco film of the present invention. be able to

In addition, according to an embodiment of the present invention, by preventing discoloration and deformation while increasing the adhesion between the multilayered layers by the upper/lower primer layer 212 of the printed layer in which the color, material, and pattern are implemented, deco It has the effect of maintaining the unique beauty provided by the film for a long time.

In addition, according to an embodiment of the present invention, since various three-dimensional patterns are transferred to the imprinting layer 31 forming the uppermost surface of the decor film, when applied to home appliances, etc., the material may vary depending on the shape of the three-dimensional pattern. It has the effect of providing a decorative film that can be widely applied, such as expressing differently or giving a unique aesthetic feeling.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, those skilled in the art will understand that various modifications and variations are possible from the above description. Terms such as “include”, “comprise” or “have” described above mean that a component without a particularly opposing description may be embedded, so it does not exclude other components but includes other components It should be construed as being able to include more. In addition, the protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (7)

The steel sheet lamie decoration film with excellent high-elongation molding and cutting adhesion,
a lower layer portion provided with a PET film and having a structure in which a lower surface is in contact with a surface area of a steel plate;
a middle layer forming a printed layer on the upper surface of the lower layer to implement a decorative element including at least one of a color, a texture and a pattern; and,
Including; is formed on the upper surface of the middle layer, the upper layer to form the surface of the decorative film;
The high-elongation forming and cutting adhesion of the steel sheet lamie decorative film is excellent,
The lower layer part, the middle layer part and the upper layer part are heat-sealed in order to have a laminated structure,
The middle layer,
The upper primer layer formed on the upper surface of the print layer and the lower primer layer formed on the lower surface of the print layer are made of a material including any one of urethane, polyester, and a urethane-polyester mixture. Prevents discoloration and deformation of the printed layer,
The steel plate is
Any one of VCM steel sheet, hot-dip galvanized steel sheet, electro-galvanized steel sheet and nickel-plated steel sheet is provided with a thickness of 0.5 to 1.0 millimeters (mm),
The high-elongation forming and cutting adhesiveness of the steel sheet ramie decorative film is excellent before thermal fusion, and the thickness of the lower layer, the middle layer and the upper layer has a thickness of 20 to 40 micrometers (um),
During thermal fusion, the surface temperature of the steel sheet is heated to a temperature of 180 to 220 degrees, so that thermal energy is conducted from the surface of the steel sheet to the lower layer, the middle layer, and the upper layer to achieve mutual thermal fusion. High-elongation forming and cutting adhesive laminated steel film.
According to claim 1,
the upper layer,
After coating a resin material containing at least one of a thermoplastic resin and a photocurable resin on the upper surface of the intermediate layer, a three-dimensional pattern is formed by imprinting, and ultraviolet rays are irradiated to the area where the three-dimensional pattern is formed. A steel sheet lamie decorative film with excellent high elongation molding and cutting adhesion, characterized in that it is formed as a printing layer.
delete According to claim 1,
On the lower surface of the lower layer,
High-elongation molding and cutting, characterized in that in order to impart adhesion to the surface of the steel sheet, a hot-melt resin layer using a material containing at least one of a polyester-based resin and a polyamide-based resin as a raw material is further formed Steel plate Lamy Decor Film with excellent adhesion.
delete delete delete

Images