KR20240007566A - Exterior material for home appliance and refrigerator comprising same - Google Patents

Abstract

The disclosed invention relates to exterior materials for home appliances and refrigerators including the same.
An exterior material for home appliances according to an embodiment includes a steel plate having a yield strength of 350 to 410 MPa; A base coating layer provided on the steel plate; It may include a clear coating layer provided on the base coating layer. Additionally, the embossing depth may be 70 to 90 ㎛.

Description

Exterior material for home appliance and refrigerator comprising same {Exterior material for home appliance and refrigerator comprising same}

The disclosed invention relates to exterior materials for home appliances and refrigerators including the same.

A refrigerator is a home appliance that keeps food fresh by having a main body with a storage compartment and a cold air supply device that supplies cold air to the storage compartment. The refrigerator body may include an outermost cabinet, an inner cavity forming an inner wall, and an insulating material.

The steel sheet used for the outer box of a refrigerator may be subjected to urethane foaming treatment on the back of the steel sheet for insulation. This foaming treatment is necessary for heat insulation, soundproofing, and sound absorption, but there is a problem in that the outer surface of the steel sheet is unevenly curved after the foaming treatment.

In addition, thick steel plates were used to solve the bending problem, but the problem of large raw material requirements arose.

Therefore, there is a need to develop an exterior material that improves surface quality by solving the bending problem while utilizing thin steel plates.

The purpose of the disclosed invention to solve the above problems is to provide an exterior material for home appliances with improved surface quality while reducing the thickness, and a refrigerator including the same.

An exterior material for home appliances according to an embodiment includes a steel plate having a yield strength of 350 to 410 MPa; A base coating layer provided on the steel plate; It may include a clear coating layer provided on the base coating layer. Additionally, the embossing depth may be 70 to 90 ㎛.

A method of manufacturing an exterior material for home appliances according to an embodiment includes a base coating layer forming step of providing a base coating layer containing 2.5 to 4.0% by weight of silica on an upper part of a steel plate, based on the total weight of the base coating layer; A clear coating layer forming step of providing a clear coating layer containing 2.0 to 5.0% by weight of beads and silica, based on the total weight of the clear coating layer, on the base coating layer; And it may include an embossing step of forming an emboss on the surface of the exterior material. Additionally, the emboss may have a depth of 70 to 90 μm.

A refrigerator according to one embodiment includes a cabinet provided at the outermost portion of the refrigerator; Cavity forming the inner wall of the refrigerator; And it may include urethane provided between the outer case and the inner case. The outer box may include an exterior material for home appliances. The exterior material for home appliances includes a steel plate having a yield strength of 350 to 410 MPa; A base coating layer provided on the steel plate; It may include a clear coating layer provided on the base coating layer. Additionally, the embossing depth may be 70 to 90 ㎛.

According to one embodiment, it is possible to provide an exterior material for home appliances and a refrigerator including the same, which is thin but has improved surface quality by using a special paint, optimizing the embossing depth, and using a high-strength steel plate.

However, the effects that can be achieved by the exterior material for home appliances and the refrigerator containing the same according to the embodiments are not limited to those mentioned above, and other effects not mentioned can be found in the technical field to which the present invention belongs from the description below. It will be clearly understandable to those with ordinary knowledge.

Figure 1 is a side cross-sectional view showing a laminated structure of an exterior material for a home appliance according to an embodiment.
Figures 2 and 3 are schematic diagrams showing a mechanism by which the side gloss of an exterior material for home appliances decreases according to an embodiment.
Figure 4 is a flowchart showing a method of manufacturing an exterior material for home appliances according to an embodiment.
Figure 5 is a perspective view of a refrigerator according to one embodiment.
Figure 6 is a 3D scanned image of the degree of curvature of Comparative Example 1.
Figure 7 is a 3D scanned image of the degree of curvature in Example 1.

Hereinafter, embodiments of the disclosed invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the disclosed invention to those skilled in the art. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit illustrations of parts unrelated to the description and may slightly exaggerate the sizes of components to aid understanding.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

Singular expressions include plural expressions unless the context clearly makes an exception.

An exterior material for home appliances according to an embodiment includes a steel plate having a yield strength of 350 to 410 MPa; A base coating layer provided on the steel plate; It may include a clear coating layer provided on the base coating layer.

Figure 1 is a side cross-sectional view showing a laminated structure of an exterior material according to an embodiment.

Referring to FIG. 1, the exterior material 300 for home appliances according to the disclosed embodiment includes a steel plate 310, a base coating layer 320 provided on the steel plate 310, and a clear coating layer provided on the base coating layer 320 ( 330) may be included.

The exterior material 300 for home appliances according to one embodiment is a PCM (Pre-Coated Metal) steel sheet, such as electrolytic galvanized iron (EGI), hot-dip galvanized steel sheet (GI), etc. It may be a steel sheet obtained by painting on the steel sheet 310.

Hot-dip galvanized steel sheet is a steel sheet obtained by passing a hot-rolled steel sheet pickled and rolled into an unannealed plate through a zinc bath (pot) in a molten state. Hot-dip galvanized steel sheets can be applied with thicker plating than electrogalvanized steel sheets, ensuring better corrosion resistance.

Electro-galvanized steel sheet is a product that improves corrosion resistance by electroplating zinc on cold-rolled steel sheet. Although the amount of plating attached is less than that of hot-dip galvanized steel sheet, the thickness of the plating layer is uniform and the surface is beautiful, and since it is plated at a low temperature, the mechanical properties of the cold-rolled steel sheet as a material are improved. The properties remain the same.

The steel plate 310 may be a high-strength steel plate with a yield strength of 350 to 410 Mpa. The disclosed invention can utilize a steel sheet with a yield strength approximately 50% higher than that of the prior art in order to minimize surface deformation due to foaming treatment.

The exterior material 300 for home appliances may have an embossing depth of 70 to 90 μm.

The emboss depth is related to bend visibility. As the embossing depth becomes deeper, the difference between the intaglio and the embossing increases, which can increase the visibility of the embossed pattern. When the visibility of the embossed pattern increases, the embossed pattern has the effect of hiding the curves of the surface of the exterior material. Therefore, the deeper the embossed pattern, the lower the bend visibility may be.

However, if the embossing depth is too deep, the diameter of the hole generated on the surface of the exterior material may increase and the area of the exterior material surface may decrease. Therefore, if the embossing depth is too deep, it may be difficult to use automatic transfer equipment that adsorbs and transfers the surface of the exterior material, which may reduce productivity.

The steel plate 310 may contain 0.08 to 0.18% by weight of carbon, based on the total weight of the steel plate.

Carbon is an element that plays a major role in improving the strength of steel. As the carbon content increases, carbon atoms can invade the iron atomic lattice, deforming the surroundings and hindering the movement of dislocations.

If the carbon content is low, it may be difficult to manufacture a thin steel sheet. However, if the carbon content is too high, elongation may decrease and molding may be difficult. Therefore, the carbon content can be controlled at 0.08 to 0.18%, and preferably at 0.1 to 0.15%.

The steel plate 310 may have an elongation of 20% or more. If the elongation rate is too low, forming steel sheets may be difficult and productivity may decrease.

The base coating layer 320 may be provided on the steel plate 310. The base coating layer 320 includes polyester resin as the main resin and may include a leveling agent, pigment, etc. The base coating layer 320 of the exterior material 300 for home appliances according to the disclosed embodiment may include silica 324 as a matting agent in addition to the above-mentioned components.

The matting agent is an additive added to reduce the gloss of the exterior material 300 for home appliances. The base coating layer 320 of the exterior material 300 for home appliances according to the disclosed embodiment is based on the total weight of the base coating layer 320. It may contain 2.5 to 4.0 wt% of silica 324, and more preferably 3.5 wt% of silica 324. The silica 324 may be an acryl-coated organic silica, but is not limited thereto.

Figures 2 and 3 are schematic diagrams showing a mechanism by which the side gloss of a steel plate decreases according to an embodiment.

Referring to FIG. 2, diffuse reflection of light incident from the outside occurs due to the metallic particles 322 of the pigment included in the base coating layer 320, which increases the gloss on the side, that is, at an 85° angle. As the gloss of the side increases, the visibility of curves on the outer surface of the exterior material 300 for home appliances also increases. In the disclosed embodiment, silica 324 is added as a matting agent to prevent diffuse reflection caused by metallic particles 322 of the pigment, etc., thereby reducing visibility of gloss at an angle of 85°.

In this way, the gloss of the side of the exterior material 300 for home appliances can be reduced by including silica 324 as a matting agent not only in the clear coating layer 330, which will be described later, but also in the base coating layer 320.

The clear coating layer 330 may be provided on the base coating layer 320. The clear coating layer 330 includes polyester resin as the main resin and may include a leveling agent, etc. The clear coating layer 330 of the exterior material 300 for home appliances according to the disclosed embodiment includes silica 332 and beads 334 as matting agents in addition to the above-described components.

The clear coating layer 330 of the exterior material 300 for home appliances according to the disclosed embodiment may include 2.0 to 5.0% by weight of beads 334 based on the total weight of the clear coating layer 330, and more preferably It may include 2.0% by weight of beads 334. Acrylic beads may be used as the beads 334, but are not limited thereto. And the bead 334 may have a size of 20 to 50 ㎛, preferably 20 ㎛.

Meanwhile, the size of the bead refers to the length of the longest axis in the cross section of the bead.

Hereinafter, the special paint that forms the base coating layer 320 and the clear coating layer 330 is referred to as a side reduction paint.

Silica 332 along with the above-described beads 334 may also be included as a matting agent. Silica 332 may be included in an amount of 5% by weight based on the total weight of the clear coating layer 330.

Referring to FIG. 3, when acrylic beads 334 with rough particles are used together with silica 332 as a matting agent in the clear coating layer 330, the diffuse reflection of light is maximized, and this causes the side surface, that is, at an angle of 85°. Glossiness decreases. Therefore, visibility of gloss at an 85° angle can be reduced.

The exterior material 300 for home appliances may have an 85 degree gloss of 10 GU or less, preferably 5 GU or less, and more preferably 3 GU or less.

The outer surface of the refrigerator may be made of a PCM steel sheet as described above, and there is a problem in that the outer surface of the steel sheet is unevenly curved during foaming treatment for insulation.

These curves formed on the outer surface of the steel plate are visible to the user and act as a factor that reduces the aesthetics of the product, thereby lowering its marketability.

The disclosed embodiment seeks to provide an exterior material for home appliances that can reduce the visibility of curves in the outer surface of the body, which deteriorates the aesthetics of the product, and a refrigerator including the same.

More specifically, in the past, attempts were continuously made to lower the surface gloss of the steel plate in order to lower the visibility of such curves. However, all surface glosses subject to this improvement were frontal, that is, gloss at a 60° angle. In addition, in order to lower the surface gloss, all existing steel sheets have lowered the gloss by adding a matting agent only to the upper coating layer. As the gloss of the steel plate surface decreased, the visibility of the curves decreased, but the degree was not large and there was no fundamental improvement.

The inventors realized that in the case of such bending, the bending is not well recognized from the front, but is easily recognized from the side, and used a gloss meter to measure the curved steel sheet by angle (20°, 60°, 85°). As a result of measuring the gloss, it was confirmed that the lower the gloss at the 85° angle, the lower the visibility of the curve. In particular, it was confirmed that when the gloss at an 85° angle was measured to be 10 GU or less, the visibility of curves was reduced to the desired level. In addition, it was confirmed that the lower the gloss at the 85° angle compared to the gloss at the 60° angle, the more the visibility of the curves was reduced.

The disclosed embodiment seeks to solve the problem of reduced marketability by providing an exterior material for home appliances that reduces the visibility of curves by lowering the gloss of the 85° angle at which curves are perceived.

The exterior material 300 for home appliances may have a thickness of 0.4 mm or less.

The disclosed invention seeks to reduce the amount of raw materials required by controlling the thickness of the exterior material to be thin. For this purpose, a steel plate with high yield strength can be used, a coating layer can be formed on the top, and the embossing depth can be optimized.

Next, a method for manufacturing an exterior material for home appliances according to another aspect of the disclosed invention will be described in detail.

A method of manufacturing an exterior material for home appliances according to an embodiment includes a base coating layer forming step of providing a base coating layer containing 2.5 to 4.0% by weight of silica on an upper part of a steel plate, based on the total weight of the base coating layer; A clear coating layer forming step of providing a clear coating layer containing 2.0 to 5.0% by weight of beads and silica, based on the total weight of the clear coating layer, on the base coating layer; and an emboss forming step of forming an emboss on the surface of the exterior material. Additionally, the emboss may have a depth of 70 to 90 μm.

The description of the coating layer component content and embossing depth is as described above, and the manufacturing method of the exterior material for home appliances will be described in detail below.

Figure 4 is a flowchart showing a method of manufacturing an exterior material for home appliances according to an embodiment.

Referring to FIG. 4, the method of manufacturing an exterior material for home appliances according to an embodiment may include a base coating layer forming step (S500), a clear coating layer forming step (S600), and an emboss forming step (S700).

First, prepare a steel sheet 310 such as an electrolytic galvanized iron (EGI) or a hot-dip galvanized steel sheet (GI), and then form a base coating layer on the steel sheet 310. You can. The base coating layer 320 includes polyester resin as the main resin and may include a leveling agent, pigment, etc. The base coating layer 320 of the exterior material 300 for home appliances according to the disclosed embodiment may include silica 324 as a matting agent in addition to the above-mentioned components.

The exterior material 300 for home appliances may be manufactured by a 2C-2B (2 coating 2 baking) method including the step of baking after forming each coating layer. Alternatively, the exterior material 300 for home appliances is provided with a primer coating layer, a base coating layer 320, and a clear coating layer 330 on a steel plate 310, and 3C-3B (3) including the step of firing after forming each coating layer. It can also be manufactured by coating 3 baking method. The following disclosed embodiments are explained by taking a steel plate manufactured by the 2C-2B method as an example.

The clear coating layer 330 may be provided on the base coating layer 320. The clear coating layer 330 includes polyester resin as the main resin and may include a leveling agent, etc. The base coating layer 320 of the steel sheet 300 according to the disclosed embodiment may include silica 332 and beads 334 as matting agents in addition to the above-described components.

In the emboss forming step (S700), emboss may be formed on the surface of the exterior material 300 for home appliances. In the emboss formation step, bend visibility can be lowered by forming an emboss with a depth of 70 to 90 μm.

The steel plate 310 may have a yield strength of 350 to 410 Mpa and may contain 0.08 to 0.18% by weight of carbon based on the total weight of the steel plate.

Additionally, the bead 334 may have a size of 20 to 50 μm.

Next, a refrigerator according to another aspect of the disclosed invention will be described in detail.

A refrigerator according to one embodiment includes a cabinet provided on the outermost side of the refrigerator; Cavity forming the inner wall of the refrigerator; And it may include urethane provided between the outer case and the inner case. The outer box may include an exterior material for home appliances. The exterior material for home appliances includes steel plates having a yield strength of 350 to 410 MPa; A base coating layer provided on the steel plate; It may include a clear coating layer provided on the base coating layer. Additionally, the embossing depth may be 70 to 90 ㎛.

The description of the exterior material for the home appliance is as described above, and the refrigerator according to one embodiment will be described in detail below.

Figure 5 is a perspective view of a refrigerator according to one embodiment.

Referring to FIG. 5, the refrigerator 1 includes a main body 10, a storage compartment 13 formed by dividing the inside of the main body 10 into upper and lower sections, a door 100 that opens and closes the storage compartment 13, and a storage compartment ( 13) includes a cold air supply device (not shown) that supplies cold air.

The main body 10 includes an inner case 11 that forms the storage compartment 13, an outer case 12 that is coupled to the outside of the inner case to form an exterior, and a main body insulator that is foamed between the inner case and the outer case to insulate the storage compartment 20. It may be configured to include (not shown). The external wound can be manufactured using a PCM (Pre coated metal) steel plate 300.

The cold air supply device can generate cold air using a cooling cycle that compresses, condenses, expands, and evaporates the refrigerant.

The storage compartment 13 may be divided into a plurality of partitions 15, and a plurality of shelves 14 and storage containers 16 may be provided inside the storage compartment 13 to store food, etc.

The storage compartment 13 may be divided into a plurality of storage compartments 13a and 13b by a partition 15, and the partition 15 is a first partition that is arranged horizontally and divides the interior of the storage compartment 13 in the vertical direction. It includes (17) and a second partition (19) that is arranged vertically and divides the interior of the storage compartment (13) in the horizontal direction.

The division of the storage compartment 13 as described above is just an example, and of course, the storage compartment 13 may be divided in other ways than the above-described examples.

The storage compartment 13 can be opened and closed by the door 100. The door 100 includes a pair of first doors (or upper doors, 101) that open and close the upper storage compartment (13a) and a pair of second doors (or lower doors, 102) that open and close the lower storage compartment (13b). It can be included.

The pair of first doors 101 and the pair of second doors 102 can open and close the main body opening 10a of the opened main body 10. The first door 101 and the second door 102 may be provided with handles, and the user may use the handles provided on the first door 101 and the second door 102 to open the first door 101 and the second door 102. The second door (102) can be opened.

A door shelf 105 capable of storing food may be provided on the back of the first door 101. The door shelf 105 may include a shelf support portion 107 extending vertically from the first door 101 to support the door shelf 105 on both left and right sides of the door shelf 105. The shelf support portion 107 may be separately provided on the first door 101 to be detachable. In this embodiment, the shelf support portion 107 protrudes rearward from the back of the first door 101 and extends in the vertical direction.

A first gasket 109 may be provided on the rear edge of the first door 101 to seal the gap with the main body 10 when the first door 101 is closed. The first gasket 109 may be installed in a loop shape along the edge of the rear surface of the first door 101, and a first magnet (not shown) may be included inside.

The lower storage compartment 13b can be opened and closed by a second door 102 rotatably coupled to the main body 10. A second gasket 106 may be provided on the rear edge of the second door 102 to seal the gap with the main body 10 when the second door 102 is closed. The second gasket 106 may be installed in a loop shape along the edge of the rear surface of the second door 102, and a second magnet (not shown) may be included inside.

The steel sheet may contain 0.08 to 0.18% by weight of carbon, based on the total weight of the steel sheet, and may have an elongation of 20% or more.

The base coating layer may include 2.5 to 4.0% by weight of silica based on the total weight of the base coating layer, and the clear coating layer may include 2.0 to 5.0% by weight of beads and silica based on the total weight of the clear coating layer. The beads included in the clear coating layer may have a size of 20 to 50 ㎛.

The exterior material for home appliances may have an 85 degree gloss of 10 GU or less and a thickness of 0.4 mm or less.

Below, examples and comparative examples are described to aid understanding of the present invention. However, the following description is only an example of the content and effect of the disclosed invention, and the scope and effect of the disclosed invention are not necessarily limited thereto.

{Example}

Exterior material specimens for home appliances having the composition shown in Table 1 below were manufactured.

Yield strength was measured at room temperature in accordance with the ASTM KS B 0802 standard for steel plates using a tensile tester under a tensile speed of 20 mm/min.

The embossing depth was measured using Mitutoyo's Digimatic MicroMeter (MDC-25MXT) equipment at room temperature.

Whether to use side reduction paint yield strength
(MPa) emboss depth
(㎛) Comparative Example 1 X 250 50 Comparative example 2 O 380 60 Example 1 O 380 70 Example 2 O 380 80 Example 3 O 380 90 Comparative Example 3 O 380 100

Table 2 below shows the glossiness, degree of waviness, and whether automatic transfer is possible.

Glossiness was measured at room temperature and at angles of 60 and 85 degrees using BYK's Gloss Meter in accordance with ASTM D523 and D2457.

The degree of bending was measured 24 hours after foaming urethane on the exterior material to which the specimen was applied, by imaging the surface with a 3D scanner. At this time, the average height and standard deviation of the curves were measured, and if the standard deviation was 1.0 or less, it was evaluated as good.

The 3D scanning method used a laser-based 3D measurement with a strong surface material and then measured it through a bending visualization algorithm.

When the specimen was applied to an automatic transport device using a rubber suction plate, it was judged to be defective if it fell without being adsorbed on the suction plate.

Glossiness
(GU) degree of curvature Is automatic transfer possible? 60 degrees 85 degrees Comparative Example 1 6.8 4.2 error Good Comparative example 2 4.6 2.8 error Good Example 1 4.6 2.5 Good Good Example 2 4.6 2.2 Good Good Example 3 4.4 2.1 Good Good Comparative Example 3 4.4 1.8 Good error

Referring to Table 2, Examples 1 to 3 used a side-reducing paint, had a yield strength of 350 to 410 MPa, and an emboss depth of 70 to 90 ㎛. Therefore, the 85 degree opacity was low, and the degree of bending and automatic transferability were all found to be good.

However, in Comparative Examples 1 and 2, the embossing depth was shallow and the degree of bending was poor. That is, Comparative Examples 1 and 2 could be evaluated as having poor surface quality.

In Comparative Example 3, the embossing depth was too deep and automatic transfer was poor, so it could be evaluated that productivity was low.

Figure 6 is a 3D scanned image of the degree of curvature of Comparative Example 1, and Figure 7 is a 3D scanned image of the degree of curvature of Example 1. At this time, the more red the sign is, the more severe the degree of curvature is, and the more blue the sign is, the better the degree of curvature.

Referring to Figures 6 and 7, it can be seen that the degree of bending of Example 1 is better than that of Comparative Example 1.

Table 3 below shows the stiffness (N/mm) according to embossing depth for exterior materials for home appliances using side-reducing paint and steel plates with a yield strength of 380 MPa.

Stiffness was expressed by measuring the displacement when a vertical load of 800N was applied to a specimen of the same area at room temperature. At this time, the stiffness can be calculated through equation (1) below.

Equation (1): Stiffness (N/mm) = Load (N)

emboss depth
(㎛) 40 60 80 100 Rigidity (N/mm) 88.43 89.22 90.39 90.51

Referring to Table 3, it can be seen that the stiffness increases as the emboss depth increases. In other words, it was confirmed that the deeper the embossing depth, the greater the rigidity of the exterior material, which improved the resistance to bending and improved surface quality.

According to one embodiment, it is possible to provide an exterior material for home appliances and a refrigerator including the same, which is thin but has improved surface quality by using special paints, optimizing the embossing depth, and using high-strength steel plates.

Claims (20)

Steel sheet having a yield strength of 350 to 410 MPa;
A base coating layer provided on the steel plate;
It includes a clear coating layer provided on the base coating layer,
An exterior material for home appliances with an embossing depth of 70 to 90 μm. According to paragraph 1,
The steel plate is,
An exterior material for home appliances containing 0.08 to 0.18% by weight of carbon, based on the total weight of the steel plate. According to paragraph 1,
The steel plate is,
Exterior material for home appliances with an elongation of 20% or more. According to paragraph 1,
The base coating layer is,
An exterior material for home appliances containing 2.5 to 4.0% by weight of silica, based on the total weight of the base coating layer. According to paragraph 1,
The clear coating layer is,
An exterior material for home appliances, comprising 2.0 to 5.0% by weight of beads and silica, based on the total weight of the clear coating layer. According to paragraph 1,
The beads included in the clear coating layer are exterior materials for home appliances with a size of 20 to 50 ㎛. According to paragraph 1,
Exterior material for home appliances with an 85-degree gloss of 10 GU or less. According to paragraph 1,
Exterior material for home appliances with a thickness of 0.4 mm or less. A base coating layer forming step of providing a base coating layer containing 2.5 to 4.0% by weight of silica on the top of the steel sheet, based on the total weight of the base coating layer;
A clear coating layer forming step of providing a clear coating layer containing 2.0 to 5.0% by weight of beads and silica, based on the total weight of the clear coating layer, on the base coating layer; and
It includes an emboss forming step of forming an emboss on the surface of the exterior material,
The embossing has a depth of 70 to 90 ㎛, a method of manufacturing an exterior material for home appliances. According to clause 9,
The steel plate is,
A method of manufacturing an exterior material for home appliances with a yield strength of 350 to 410 MPa. According to clause 9,
The steel plate is,
A method of manufacturing an exterior material for home appliances, comprising 0.08 to 0.18% by weight of carbon, based on the total weight of the steel plate. According to clause 9,
The beads are,
Method for manufacturing exterior materials for home appliances with a size of 20 to 50㎛. A cabinet provided on the outermost side of the refrigerator;
Cavity forming the inner wall of the refrigerator; and
Including urethane provided between the outer box and the inner box,
The above trauma is,
Including exterior materials for home appliances,
The exterior material for the home appliance is,
Steel sheet having a yield strength of 350 to 410 MPa;
A base coating layer provided on the steel plate;
It includes a clear coating layer provided on the base coating layer,
Refrigerator with an emboss depth of 70 to 90 μm. According to clause 13,
The steel plate is,
A refrigerator comprising 0.08 to 0.18% by weight of carbon, based on the total weight of the steel sheet. According to clause 13,
The steel plate is,
Refrigerator with an elongation rate of 20% or more. According to clause 13,
The base coating layer is,
A refrigerator comprising 2.5 to 4.0% by weight of silica, based on the total weight of the base coating layer. According to clause 13,
The clear coating layer is,
A refrigerator comprising 2.0 to 5.0% by weight of beads and silica, based on the total weight of the clear coating layer. According to clause 13,
The beads included in the clear coating layer have a size of 20 to 50 ㎛, refrigerator. According to clause 13,
The exterior material for the home appliance is,
Refrigerator with 85 degrees Gloss of 10 GU or less. According to clause 13,
The exterior material for the home appliance is,
Refrigerator with a thickness of 0.4 mm or less.

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