Coating layer comprising bio-based resin and home appliance comprising same

Abstract

This refrigerator may comprise: a main body; a door connected to the main body and rotatably connected so as to open and close the main body; and a storage chamber disposed inside the main body and storing food. The exterior material of the main body may comprise: a frame comprising a metal material; a primer layer disposed on the frame; a base layer disposed on the primer layer and comprising a first bio-based resin; and a clear layer disposed on the base layer and comprising a second bio-based resin. The base layer and / or the clear layer may contain biomass and inorganic additives.

Description

Coating layer containing bio-based resin and home appliance containing the same

[0001] One embodiment of the present disclosure relates to a coating layer used on the body of a home appliance, wherein the coating layer may include a bio-based resin.

[0002] Household appliances refer to electronic and electrical devices used in the home, and may include devices that help make housework more convenient and improve the quality of life, such as refrigerators, washing machines, and air conditioners.

[0003] Recently, home appliances are being manufactured to serve important roles in terms of design, interior aesthetics, and environmental aspects, in addition to practical purposes. For example, the main body (e.g., housing) forming the exterior of a home appliance may include coating layers of various shapes to ensure chemical resistance and mechanical properties, and to provide an exterior material with high brightness and high linearity. Furthermore, in home appliances, the coating layer formed to wrap around the frame of the exterior material can minimize negative environmental impacts when the product is manufactured using eco-friendly materials. The coating layer of the exterior material may include a bio-based resin derived from biomass.

[0004] With the recent rise in environmental awareness, significant efforts are being made across various sectors to reduce carbon dioxide, which is identified as the primary culprit behind global warming. Among these efforts, bio-based raw materials are gaining attention as a potential replacement for conventional petroleum and coal resources.

[0005] When paints containing bio-based resins (e.g., biomass) are used as the coating layer for the exterior materials of home appliances, carbon dioxide emissions are reduced throughout the entire production process compared to paints using general petrochemical resins, because the bio-raw materials are derived from plants that utilize atmospheric carbon dioxide during their growth.

[0006] However, in paints for the exterior materials of home appliances, as the content of bio-based resin increases, the chemical resistance and mechanical properties of the entire film may weaken.

[0007] Accordingly, the design of a coating layer having high brightness and high linearity is discussed, which allows exterior materials of home appliances, including bio-based resins, to maintain chemical resistance and mechanical properties while providing an aesthetic appeal when viewed from the outside.

[0008] A refrigerator according to the present disclosure may include a main body, a door connected to the main body and rotatably connected to open and close the main body, and a storage compartment disposed inside the main body for storing food. The exterior material of the main body may include a frame comprising a metal material, a primer layer disposed on the frame, a base layer disposed on the primer layer and comprising a first bio-based resin, and a clear layer disposed on the base layer and comprising a second bio-based resin. The base layer and / or the clear layer may contain the biomass and inorganic additives.

[0009] The above inorganic additive may include silica (Si) and zirconium (Zr).

[0010] The content of the inorganic additive contained in the base layer may be 0.2 wt% to 0.6 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive contained in the clear layer may be 0.2 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

[0011] The silica content of the inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total weight of the inorganic additive, and the zirconium content of the inorganic additive may be 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0012] The content of the first bio-based resin in the base layer may be 10 wt% to 100 wt% relative to the total resin weight of the base layer.

[0013] The content of the second bio-based resin in the clear layer may be 10 wt% to 100 wt% relative to the total resin weight of the clear layer.

[0014] The average molecular weight (MW) of the first bio-based resin is 2,000 to 5,000 g / mol, and the average molecular weight (MW) of the second bio-based resin may be 10,000 to 20,000 g / mol.

[0015] The base layer may further comprise a first petroleum-based resin, and the average molecular weight (MW) of the first petroleum-based resin of the base layer may be 5,000 to 10,000 g / mol and / or the clear layer may further comprise a second petroleum-based resin, and the average molecular weight (MW) of the second petroleum-based resin of the clear layer may be 1,000 to 3,000 g / mol.

[0016] The content of the first bio-based resin in the base layer may be 20 wt% to 30 wt% relative to the total resin weight of the base layer, and / or the content of each of the second bio-based resins in the clear layer may be 20 wt% to 30 wt% relative to the total resin weight of the clear layer, and the content of the inorganic additive in the base layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive in the clear layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the clear layer.

[0017] The content of the first bio-based resin in the base layer may be 55 wt% to 65 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin in the clear layer may be 55 wt% to 65 wt% relative to the total resin weight of the clear layer, and the content of the inorganic additive in the base layer may be 0.3 wt% to 0.5 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive in the clear layer may be 0.3 wt% to 0.5 wt% relative to the total resin weight of the clear layer.

[0018] The content of the first bio-based resin in the base layer may be 100 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin in the clear layer may be 100 wt% relative to the total resin weight of the clear layer, and the content of the inorganic additive in the base layer may be 0.4 wt% to 0.6 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive in the clear layer may be 0.4 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

[0019] The content of the first bio-based resin of the base layer may be 20 wt% to 25 wt% relative to the total resin weight of the base layer, and the content of the second bio-based resin of the clear layer may be 25 wt% to 30 wt% relative to the total resin weight of the clear layer.

[0020] The base layer and / or the clear layer comprise a curing agent, a deformer, and a catalyst, wherein the content of the curing agent in the base layer is 5.0 wt% to 10.0 wt% relative to the total resin weight of the base layer and / or the content of the curing agent in the clear layer is 5.0 wt% to 10.0 wt% relative to the total resin weight of the clear layer, the content of the deformer in the base layer is approximately 0.2 wt% to 0.5 wt% relative to the total resin weight of the base layer and / or the content of the deformer in the clear layer is approximately 0.2 wt% to 0.5 wt% relative to the total resin weight of the clear layer, and the content of the catalyst in the base layer is approximately 0.5 wt% to 1.0 wt% relative to the total resin weight of the base layer. and / or the content of the catalyst in the clear layer may be approximately 0.5 wt% to 1.0 wt% relative to the total resin weight of the clear layer. The appliance according to the present disclosure may include an exterior material. The exterior material may include a frame comprising a metal material, a primer layer disposed on the frame, a base layer disposed on the primer layer comprising a first bio-based resin, and a clear layer disposed on the base layer comprising a second bio-based resin. The base layer (432) and / or the clear layer (433) comprises inorganic additives, wherein the content of the inorganic additives in the base layer (432) is 0.2 wt% to 0.6 wt% relative to the total resin weight of the base layer and / or the content of the inorganic additives in the clear layer (433) is 0% relative to the total resin weight of the clear layer.It can be 2 wt% to 0.6 wt%.

[0021] The above inorganic additive may include silica (Si) and zirconium (Zr).

[0022] The silica content of the above inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total weight of the above inorganic additive, and the zirconium content may be 0.1 wt% to 0.2 wt% relative to the total weight of the above inorganic additive.

[0023] The content of the first bio-based resin in the base layer may be 20 wt% to 30 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin in the clear layer may be 20 wt% to 30 wt% relative to the total resin weight of the clear layer, and the content of the inorganic additive in the base layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the base layer, and / or, the content of the inorganic additive in the clear layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the clear layer.

[0024] A washing machine according to the present disclosure may include a main body having an opening formed on the front, a tub disposed inside the main body and configured to contain water, and a rotating drum rotatably disposed inside the tub. The exterior material of the main body may include a frame comprising a metal material, a primer layer disposed on the frame, a base layer disposed on the primer layer and comprising a first bio-based resin, and a clear layer disposed on the base layer and comprising a second bio-based resin. The base layer and / or the clear layer may comprise inorganic additives, and the content of the inorganic additives in the base layer (432) may be 0.2 wt% to 0.6 wt% relative to the total resin weight of the base layer and / or the content of the inorganic additives in the clear layer (433) may be 0.2 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

[0025] The above inorganic additive may include silica (Si) and zirconium (Zr).

[0026] The silica content of the above inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total weight of the above inorganic additive, and the zirconium content may be 0.1 wt% to 0.2 wt% relative to the total weight of the above inorganic additive.

[0027] The content of the first bio-based resin in the base layer may be 20 wt% to 30 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin in the clear layer may be 20 wt% to 30 wt% relative to the total resin weight of the clear layer, and the content of the inorganic additive in the base layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the base layer, and / or, the content of the inorganic additive in the clear layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight of the clear layer.

[0028] However, the problems to be solved in this disclosure are not limited to those mentioned above, and may be determined in various ways without departing from the spirit and scope of this disclosure.

[0029] FIG. 1 is a perspective view of a refrigerator according to one embodiment of the present disclosure.

[0030] FIG. 2 is a block diagram showing the configuration of a refrigerator according to one embodiment of the present disclosure.

[0031] FIG. 3 is a cross-sectional view of a part of a main body forming the exterior of a refrigerator according to one embodiment of the present disclosure.

[0032] Figures 4a and 4b are drawings showing the results of a chemical resistance test on a coating layer of a common household appliance (e.g., refrigerator, washing machine) under specific conditions.

[0033] FIG. 5 is a diagram showing the results of a chemical resistance test on a coating layer of a home appliance (e.g., refrigerator, washing machine) under specific conditions, according to one embodiment of the present disclosure.

[0034] FIG. 6a is an external perspective view of a washing machine according to one embodiment of the present disclosure.

[0035] FIG. 6b is a side cross-sectional view of a washing machine according to one embodiment of the present disclosure.

[0036] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0037] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0038] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0039] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0040] In this document, the term “and / or” includes a combination of multiple related described components or any of the multiple related described components.

[0041] In this document, terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in any other aspect (e.g., importance or order).

[0042] In this document, terms such as "front," "rear," "top," "bottom," "side," "left," "right," "top," and "bottom" are defined based on the drawings, and the shape and location of each component are not limited by these terms.

[0043] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0044] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0045] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0046] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0047] A refrigerator according to one embodiment may include a main body.

[0048] The "main body" may include an inner body, an outer body positioned on the outside of the inner body, and an insulating material provided between the inner body and the outer body.

[0049] The "inner body" may include at least one of a case, plate, panel, or liner forming a storage chamber. The inner body may be formed as a single body or may be formed by assembling multiple plates. The "outer body" may form the exterior of the main body and may be coupled to the outer side of the inner body so that an insulating material is disposed between the inner body and the outer body.

[0050] The "insulating material" can insulate the interior and exterior of the storage room so that the temperature inside the storage room is maintained at a set appropriate temperature without being affected by the external environment. According to one embodiment, the insulating material may include a foamed insulating material. The foamed insulating material can be formed by injecting and foaming urethane foam, which is a mixture of polyurethane and a foaming agent, between the inner and outer layers.

[0051] According to one embodiment, the insulation material may additionally include a vacuum insulation material in addition to a foam insulation material, or the insulation material may consist solely of a vacuum insulation material instead of a foam insulation material. The vacuum insulation material may include a core material and an outer shell material that accommodates the core material and seals the interior under vacuum or near-vacuum pressure. However, the insulation material is not limited to the foam insulation material or vacuum insulation material described above and may include various materials that can be used for insulation.

[0052] The "storage room" may include a space defined by an internal structure. The storage room may further include an internal structure defining a space corresponding to the storage room. Various items such as food, medicine, and cosmetics may be stored in the storage room, and the storage room may be formed so that at least one side is open to allow for the retrieval and retrieval of items.

[0053] A refrigerator may include one or more storage compartments. When two or more storage compartments are formed in a refrigerator, each storage compartment may have a different use and may be maintained at a different temperature. To this end, each storage compartment may be partitioned from one another by a partition containing insulation.

[0054] The storage room may be provided to be maintained within an appropriate temperature range according to its intended use and may include a "refrigeration room," "freezing room," or "variable temperature room" distinguished according to its intended use and / or temperature range. The refrigerator room may be maintained at a temperature appropriate for refrigerated storage of goods, and the freezer room may be maintained at a temperature appropriate for frozen storage of goods. "Refrigeration" may mean cooling goods to a temperature that does not freeze them; for example, the refrigerator room may be maintained within a range of 0°C to 7°C. "Freezing" may mean cooling goods to freeze them or to maintain them in a frozen state; for example, the freezer room may be maintained within a range of -20°C to -1°C. The variable temperature room may be used as either a refrigerator room or a freezer room, with or without the user's choice.

[0055] Storage rooms may be referred to by various names, such as "vegetable room," "fresh room," "cooling room," and "ice-making room," in addition to terms like "refrigeration room," "freezing room," and "variable temperature room." The terms "refrigeration room," "freezing room," and "variable temperature room" used below should be understood as encompassing storage rooms with corresponding uses and temperature ranges.

[0056] According to one embodiment, the refrigerator may include at least one door configured to open and close one side of the storage compartment. The door may be provided to open and close each of one or more storage compartments, or a single door may be provided to open and close multiple storage compartments. The door may be installed to be rotatable or sliding on the front of the main body.

[0057] The “door” may be configured to seal the storage room when the door is closed. The door may include insulation material, similar to the main body, to insulate the storage room when the door is closed.

[0058] According to one embodiment, the door may include a door outer panel forming the front of the door, a door inner panel forming the rear of the door and facing the storage room, an upper cap, a lower cap, and a door insulation material provided inside them.

[0059] A gasket may be provided on the edge of the door inner panel to seal the storage compartment by adhering to the front of the main body when the door is closed. The door inner panel may include a dyke that protrudes rearward to allow a door basket for storing items to be mounted.

[0060] According to one embodiment, the door may include a door body and a front panel detachably coupled to the front side of the door body and forming the front of the door. The door body may include a door outer panel forming the front of the door body, a door inner panel forming the rear of the door body and facing the storage compartment, an upper cap, a lower cap, and a door insulation material provided inside them.

[0061] Refrigerators can be classified into French Door Type, Side-by-side Type, BMF (Bottom Mounted Freezer), TMF (Top Mounted Freezer), or 1-door refrigerators depending on the arrangement of the door and storage compartment.

[0062] According to one embodiment, the refrigerator may include a cold air supply device arranged to supply cold air to the storage compartment.

[0063] The "cold air supply device" may include a machine, apparatus, electronic device, and / or a system combining these that can generate cold air and guide cold air to cool a storage room.

[0064] According to one embodiment, a cold air supply device can generate cold air through a refrigeration cycle that includes the processes of compression, condensation, expansion, and evaporation of a refrigerant. To this end, the cold air supply device may include a refrigeration cycle device having a compressor, a condenser, an expansion device, and an evaporator capable of driving the refrigeration cycle. According to one embodiment, the cold air supply device may include a semiconductor such as a thermoelectric element. The thermoelectric element can cool a storage chamber through heat generation and cooling action via the Peltier effect.

[0065] According to one embodiment, the refrigerator may include a machine room arranged to accommodate at least some parts belonging to a cold air supply device.

[0066] The "machine room" may be configured to be partitioned and insulated from the storage room to prevent heat generated from components placed in the machine room from being transferred to the storage room. The interior of the machine room may be configured to communicate with the exterior of the main body to dissipate heat from components placed inside the machine room.

[0067] According to one embodiment, the refrigerator may include a dispenser provided on the door to provide water and / or ice. The dispenser may be provided on the door so that it is accessible to a user without opening the door.

[0068] According to one embodiment, the refrigerator may include an ice-making device configured to generate ice. The ice-making device may include an ice-making tray that stores water, an ice-removing device that separates ice from the ice-making tray, and an ice bucket that stores the ice generated from the ice-making tray.

[0069] According to one embodiment, the refrigerator may include a control unit for controlling the refrigerator.

[0070] The "control unit" may include a memory that stores or remembers a program and / or data for controlling a refrigerator, and a processor that outputs a control signal for controlling a cold air supply device, etc., according to the program and / or data stored in the memory.

[0071] The memory stores or records various information, data, commands, programs, etc., necessary for the operation of the refrigerator. The memory can store temporary data generated while generating control signals to control the components included in the refrigerator. The memory may include at least one of volatile memory or non-volatile memory, or a combination thereof.

[0072] The processor controls the overall operation of the refrigerator. The processor can control the components of the refrigerator by executing programs stored in memory. The processor may include a separate NPU that performs the operation of an artificial intelligence model. Additionally, the processor may include a central processing unit, a graphics processing unit (GPU), etc. The processor can generate control signals to control the operation of the cold air supply unit. For example, the processor can receive temperature information of the storage compartment from a temperature sensor and generate a cooling control signal to control the operation of the cold air supply unit based on the temperature information of the storage compartment.

[0073] Additionally, the processor can process user input of the user interface and control the operation of the user interface according to programs and / or data stored in memory. The user interface may be provided using an input interface and an output interface. The processor can receive user input from the user interface. Additionally, the processor can transmit display control signals and image data to the user interface to display an image on the user interface in response to the user input.

[0074] The processor and memory may be provided as a single unit or separately. The processor may include one or more processors. For example, the processor may include a main processor and at least one sub-processor. The memory may include one or more memory units.

[0075] According to one embodiment, the refrigerator may include a processor and memory that control all components included in the refrigerator, and may include a plurality of processors and a plurality of memories that individually control the components of the refrigerator. For example, the refrigerator may include a processor and memory that control the operation of a cold air supply device according to the output of a temperature sensor. Additionally, the refrigerator may separately provide a processor and memory that control the operation of a user interface according to user input.

[0076] The communication module can communicate with external devices, such as servers, mobile devices, and other home appliances, through nearby Access Points (APs). The Access Point (AP) can connect the Local Area Network (LAN) to which the refrigerator or user device is connected to the Wide Area Network (WAN) to which the server is connected. The refrigerator or user device can be connected to the server through the Wide Area Network (WAN).

[0077] The input interface may include keys, touchscreens, microphones, etc. The input interface may receive user input and transmit it to the processor.

[0078] The output interface may include a display, a speaker, etc. The output interface can output various notifications, messages, information, etc. generated by the processor.

[0079] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0080] Meanwhile, terms such as "upward," "downward," "front," and "rear" used in the following description are defined based on the drawings, and the shape and location of each component are not limited by these terms. For example, the terms "front" and "rear" below may refer to the front and rear of the refrigerator in the X-direction, respectively, based on the drawings. The terms "upward" and "downward" below may refer to the upward and downward directions of the refrigerator in the Z-direction, respectively, based on the drawings. The terms "left" and "right" below may refer to the left and right directions of the refrigerator in the Y-direction, respectively, based on the drawings.

[0081] FIG. 1 is a perspective view of a refrigerator according to one embodiment of the present disclosure.

[0082] Referring to FIG. 1, the refrigerator (1) may include a main body (10), a storage room (20), a door (30), and / or a cold air supply device.

[0083] According to one embodiment, the storage room (20) may be partitioned inside the main body (10) and formed into multiple spaces. A door (30) may be positioned at the front of the main body (10) to open and close the storage room (20). A cold air supply device may be provided inside the main body (10) to supply cold air to the storage room (20).

[0084] According to one embodiment, the main body (10) may include an inner housing (11) and / or an outer housing (12). The inner housing (11) may be provided to form, for example, the exterior of the storage room (20). The inner housing (11) may be, for example, made of a plastic material and injection molded integrally. The outer housing (12) may be provided to form, for example, at least a part of the exterior of the refrigerator (1). The outer housing (12) may be made of, for example, a metal material with excellent durability and aesthetic appeal. A receiving space may be formed between the inner housing (11) and the outer housing (12). A main body insulation material (not shown) that insulates the storage room (20) may be provided in part of the receiving space.

[0085] According to one embodiment, a cold air supply device can generate cold air by using a cooling circulation cycle that compresses, condenses, expands, and evaporates a refrigerant.

[0086] According to one embodiment, the storage room (20) may be divided into multiple sections by partitions (14). The storage room (20) may be formed by the internal housing (11) of the main body (10) and the partitions (14). Inside the storage room (20), a plurality of shelves (24) or storage containers (25) may be provided to store food or the like. The plurality of shelves (24) and storage containers (25) may be provided, for example, so as to be separable.

[0087] According to one embodiment, the storage room (20) may be divided into a plurality of storage rooms (21, 22, 23) by a partition wall (14). For example, the storage room (20) may include one first storage room (21) located at the top (e.g., upper storage room) and two second storage rooms (22) (e.g., lower storage rooms) and a third storage room (23) (e.g., lower storage room) located at the bottom, as illustrated.

[0088] According to one embodiment, the partition (14) may include a first partition (141) and a second partition (142). The partition (14) may, for example, have a T-shaped cross-section. The first partition (141) may be provided horizontally, for example, to partition the first storage room (21) and the second and third storage rooms (22, 23). The second partition (142) may be provided vertically, for example, to partition the second storage room (22) and the third storage room (23). The second partition (142) may be formed to protrude downward from the first partition (141), for example. The illustrated second partition (142) is formed protruding from the center of the first partition (141), but is not limited thereto, and the size of the second storage room (22) and the third storage room (23) may vary depending on the position of the second partition (142).

[0089] Among the illustrated storage rooms (20), the first storage room (21) can be used as a refrigerator room, and the second and third storage rooms (22, 23) can be used as freezer rooms, but are not limited thereto, and the location and number of each refrigerator room and freezer room can be varied according to the user's needs.

[0090] According to one embodiment, the number, size, or shape of the storage rooms (20) may vary depending on the shape or location of the partition wall (14). The freezer room may be maintained at approximately minus 20 degrees, and the refrigerator room may be maintained at approximately plus 3 degrees. The storage rooms (20) may be insulated, for example, by the partition wall (14).

[0091] According to one embodiment, the storage room (20) may be divided into left and right sections by a single vertical partition. Here, the vertical partition may be formed such that one end contacts the upper part of the inner housing (11) and the other end contacts the lower part of the inner housing (11). Depending on the position of the vertical partition, the size of the storage room (20) divided into left and right sections may vary. For example, the vertical partition may be provided in the center so that the storage room (20) divided into left and right sections is provided in a mirror-symmetric manner. According to one embodiment, there may be multiple vertical partitions. If there are multiple vertical partitions, three or more storage rooms (20) may be provided in the left and right directions.

[0092] According to one embodiment, the storage room (20) may be divided only into upper and lower sections by a single horizontal partition. That is, the storage room (20) may be divided into two sections, an upper storage room and a lower storage room. Here, the horizontal partition may be formed such that one end contacts the left side of the inner housing (11) and the other end contacts the right side of the inner housing (11). Depending on the position of the horizontal partition, the size of the upper and lower divided storage room (20) may vary. According to one embodiment, there may be multiple horizontal partitions. If there are multiple horizontal partitions, three or more storage rooms (20) may be provided in the upper and lower directions. In addition to the above-described embodiment, multiple storage rooms (20) of various types may be configured depending on the shape and number of the partitions (14).

[0093] According to one embodiment, the door (30) may include a first door (31) (e.g., upper door) or a second door (32) (e.g., lower door) as illustrated. The door (30) may be provided to open and close, for example, an opening (10a) of the main body (10). The first door (31) may be provided as a pair (e.g., double door) to open and close the first storage room (21), for example. The second door (32) may be provided as a pair (e.g., double door) to open and close the second storage room (22) or the third storage room (23), for example. In addition, the number and shape of the door (30) may vary in correspondence with the number and shape of the storage room (20), and the door (30) may be configured to rotate around the hinge (16) as well as to slide.

[0094] According to one embodiment, a rotating bar (316) may be provided on one of the pair of first doors (31). The rotating bar (316) may be positioned, for example, on the side opposite to the side forming the axis of rotation in one of the pair of first doors (31). The rotating bar (316) may be provided, for example, so that the axis of rotation is fixed to the side of one of the pair of first doors (31) and can rotate around the axis of rotation. The rotating bar (316) may be provided, for example, to be positioned in the center of the front of the main body (10) when one of the pair of first doors (31) is closed. The rotating bar (316) can seal the gap between the pair of first doors (31) when the pair of first doors (31) are closed. The main body (10) may be provided with a rotating bar guide (15) that guides the movement of the rotating bar (316) when one of the pair of first doors (31) is closed.

[0095] According to one embodiment, the door (30) (e.g., first door (31) or second door (32)) may include a door panel (30a) or a door body (30b). The door panel (30a) and the door body (30b) may be joined so as to be detachable.

[0096] According to one embodiment, the door body (30b) may be fixed to the main body (10) at one side by a hinge (16), for example. The door body (30b) may be provided to be rotatable relative to the main body (10). The door panel (30a) may form part of the front exterior of the refrigerator (1), for example. The door panel (30a) may be an important aesthetic element, particularly when the refrigerator (1) is placed indoors. Accordingly, the user may customize the front exterior of the refrigerator (1) as desired by replacing the door panel (30a) with one having a different color or design. According to some embodiments, the door panel (30a) and the door body (30b) may be formed as a single unit.

[0097] For convenience of explanation, only one first door (31) and one second door (32) are described below, and the description of the remaining first door (31) and the remaining second door (32) is omitted. However, the first door (31) and the second door (32) for which the description is omitted may each have a configuration approximately identical to that of the first door (31) and the second door (32) described below, except that they are arranged in a mutual mirror-symmetrical manner. Additionally, the second door (32) may have the same configuration as the first door (31), and a detailed description may be omitted.

[0098] According to one embodiment, the first door (31) may include a first door handle (not shown), a first door shelf (313), a first shelf support (314), or a first gasket (315). The first door (31) may be rotatably coupled to the main body (10), for example, to open and close at least a portion of the first storage room (21). A user may open and close the first door (31) using the first door handle. The first door handle may be formed as a recess on the bottom surface of the first door (31) or as a protrusion on the front surface of the first door (31), but is not limited thereto.

[0099] According to one embodiment, the first door shelf (313) may be provided to store food, for example. On both the left and right sides of the first door shelf (313), a first shelf support (314) may be provided to support the first door shelf (313). The first shelf support (314) may be formed to extend vertically from the first door (31), for example. That is, the first shelf support (314) may be provided to protrude rearward from the back surface of the first door (31) and extend in the vertical direction. The first shelf support (314) may be provided detachably to the first door (31) as a separate component, for example, or may be formed integrally. The first shelf support (314) may be formed to protrude rearward from the rear surface of the door body (30b), for example.

[0100] According to one embodiment, the first gasket (315) may be provided to wrap around the back edge of the first door (31), for example. Specifically, the first gasket (315) may be provided to wrap around the edge of the door body (30b). The first gasket (315) may be provided to seal the gap with the main body (10) when the first door (31) is closed.

[0101] According to one embodiment, the second door (32) may include a second door handle (321) or a second gasket (322). The second door (32) may be rotatably coupled to the main body (10), for example, to open and close the second storage room (22) or the third storage room (23). A user may open and close the second door (32) using the second door handle (321). The second door handle (321) may be formed as a recess on the upper surface of the second door (32) or as a protrusion on the front surface of the second door (32), but is not limited thereto.

[0102] According to one embodiment, the second gasket (322) may be provided to wrap around, for example, the back edge of the second door (32). The second gasket (322) may be provided to seal the gap with the main body (10) when the second door (32) is closed.

[0103] Although not illustrated, the second door (31) may further include a configuration that is wholly or partially identical to the first door shelf (313) and the first shelf support (314) of the first door (32).

[0104] According to one embodiment, the refrigerator (1) may include a top table (13) provided on the upper part of the main body (10). The top table (13) may be coupled to the upper part of the outer housing (12). For example, the top table (13) may be coupled to the upper surface of the outer housing (12). For example, the top table (13) may be fixed to the outer housing (12).

[0105] According to one embodiment, the top table (13) can cover various electrical components. A receiving space for accommodating various electrical components may be formed on the inside of the top table (13). For example, the top table (13) can cover a door driving module (400) described later, and the door driving module (400) can be accommodated on the inside of the top table (13). In this respect, the top table (13) may be named a door driving module cover. A more detailed description of the structure of the top table (13) will be provided later.

[0106] Although the refrigerator (1) according to one embodiment of the present disclosure has been described as an example of the present disclosure on the premise that it is a cold-cooling refrigerator, the concept of the present disclosure is not limited thereto and can also be applied to a direct-cooling refrigerator.

[0107] FIG. 2 is a block diagram showing the configuration of a refrigerator according to one embodiment of the present disclosure.

[0108] According to one embodiment, the refrigerator (1) may include a door driving module (150), a sensor unit (160), a cooling unit (170), a communication unit (180), a control unit (190), and / or a display (200).

[0109] According to one embodiment, the door driving module (150) can control the opening or closing of at least one door. The door driving module (150) may include at least one of a motor driving part (151), a motor (152), a push rod (153), a hinge connecting part (154), and a gear (155). For example, the door driving module (150) can precisely control the movement of at least one door (30) depending on whether or not the at least one door (30) is opened or the degree of opening.

[0110] According to one embodiment, the motor drive unit (151) can control the motor. For example, the motor drive unit (151) can activate or deactivate the motor (152). For example, the motor drive unit (151) can control the operating state of the motor (152) by supplying or cutting off power to the motor (152).

[0111] According to one embodiment, the motor (152) can open at least one door by rotating. For example, the motor (152) can open at least one door by being activated based on the control of the motor drive unit. For example, the motor (152) can close at least one door by being deactivated based on the control of the motor drive unit.

[0112] According to one embodiment, the push rod (153) can push the door (30) to open the door (30) with respect to the main body (10) or storage room (20). For example, the push rod (153) can slide forward with respect to the main body (10) or storage room (20) by receiving power transmitted from the motor (152) through the gear (155).

[0113] According to one embodiment, the hinge connecting part (154) can push the door (30) to open the door (30) with respect to the main body (10) or storage room (20). One side of the hinge connecting part (154) may be connected to the main body (10), and the other side may be rotatably connected to the door (30). For example, the hinge connecting part (154) may open the door (30) by receiving power transmitted from the motor (152) through the gear (155) and moving in the forward direction with respect to the main body (10) or storage room (20).

[0114] According to one embodiment, the gear (155) can transmit power provided from the motor (152) to the push rod (153) and / or the hinge connection (154). For example, the gear (155) may include a pinion gear for transmitting power to the push rod (153) as a plurality of power transmission members. For example, the gear (155) may include a clutch member and connecting gears for transmitting power to the hinge connection (154) as a plurality of power transmission members.

[0115] According to one embodiment, the sensor unit (160) may include a temperature sensor (161), a proximity sensor (162), a camera sensor (163), and a door opening / closing sensor (164).

[0116] According to one embodiment, the temperature sensor (161) can detect the temperature around the refrigerator (1) or inside the refrigerator (1). For example, the temperature sensor (161) may include a plurality of temperature sensors that detect the temperature inside the storage room (20). For example, the temperature sensor (161) may include a plurality of temperature sensors that detect the external temperature around the refrigerator (1).

[0117] For example, a plurality of temperature sensors may be installed in each of the plurality of storage rooms (20) to detect the temperature of each of the plurality of storage rooms (20) and output an electrical signal corresponding to the detected temperature to the control unit (190). Each of the plurality of temperature sensors may include a thermistor whose electrical resistance changes according to temperature.

[0118] According to one embodiment, the proximity sensor (162) may be a sensor that detects whether the distance to a person or object is within a predetermined distance by detecting a change in distance from the person or object. For example, the proximity sensor (162) may identify the approach of a user and detect the distance between the user and the refrigerator (1).

[0119] For example, the proximity sensor (162) may include at least one of an infrared sensor, an ultrasonic sensor, a capacitive sensor, and an inductive sensor.

[0120] According to one embodiment, the camera sensor (163) may be a sensor that converts light collected in a sensing area into an electrical signal to generate a digital image. For example, the camera sensor (163) may photograph an object around the refrigerator (1) or inside the refrigerator (1) and generate a digital image.

[0121] For example, the camera sensor (163) may include at least one of a CMOS (Complementary Metal-Oxide-Semiconductor) sensor, a CCD (Charge-Coupled Device) sensor, an IR camera, and an RGB camera.

[0122] According to one embodiment, the distance sensing sensor (164) can detect the distance between the door (30) and an external object (e.g., user) and transmit a value determined according to the specified distance to the processor (191).

[0123] According to one embodiment, the angle sensor (165) can detect the angle between the refrigerator body (10) and the door (30) and transmit a value determined according to a specified angle value to the processor (191). The angle sensor (165) can detect the position of the door (30) in various ways. For example, the angle sensor (165) may be configured to detect the magnetic field of a magnet mounted adjacent to the door drive module (150) (e.g., gear (155)). The angle sensor (165) can detect changes in the magnetic field caused by the magnet as the door (30) moves. For example, the angle sensor (165) may include a Hall sensor that detects the magnetic field. However, the type of angle sensor (165) is not limited thereto and may include various types of sensors capable of detecting the angle of the door (30) relative to the body (10). For example, the position sensing sensor (450) may include various types of sensors such as a reed switch and a light sensor.

[0124] According to one embodiment, the cooling unit (170) can supply cooled air to the storage room. Specifically, the cooling unit (170) can maintain the temperature of the storage room within a range specified by the user by utilizing the circulation of refrigerant in the refrigerant circuit.

[0125] According to one embodiment, the cooling unit (170) may include a compressor (171) that compresses a refrigerant in a gaseous state, a condenser (172) that converts the compressed gaseous refrigerant into a liquid state, an expander (173) that reduces the pressure of the liquid refrigerant, and an evaporator (174) that converts the reduced pressure liquid refrigerant into a gaseous state. The cooling unit (170) can cool the air in the storage room by utilizing the phenomenon in which the liquid refrigerant absorbs thermal energy from the surrounding air while converting into a gaseous state.

[0126] However, the cooling unit (170) is not limited to including a refrigerant circuit. For example, the cooling unit (170) may include a Peltier element utilizing the Peltier effect or a magnetic cooling material utilizing the magneto-caloric effect.

[0127] According to one embodiment, the communication unit (180) can exchange data with external devices such as a server device and / or a user device and / or a display (200) and / or a cooking device.

[0128] According to one embodiment, the communication unit (180) may include a wired communication module (182) that exchanges data with external devices via a wire, and a wireless communication module (181) that exchanges data with external devices wirelessly.

[0129] According to one embodiment, the wired communication module (182) can connect to a wired communication network and communicate with external devices through the wired communication network. For example, the wired communication module (182) can connect to a wired communication network via Ethernet (Ethernet, IEEE 802.3 technical standard) and receive data from external devices through the wired communication network.

[0130] According to one embodiment, the wireless communication module (181) can communicate wirelessly with a base station or an access point (AP) and can connect to a wired communication network through the base station or access point. The wireless communication module (181) can also communicate with external devices connected to the wired communication network via the base station or access point. For example, the wireless communication module (181) can communicate wirelessly with the access point (AP) using Wi-Fi (IEEE 802.11 technical standard) or communicate with the base station using CDMA, WCDMA, GSM, LET (Long Term Evolution), WiBro, etc. The wireless communication module (181) can also receive data from external devices via the base station or access point. Additionally, the wireless communication module (181) can communicate directly with external devices. For example, the wireless communication module (181) can receive data wirelessly from external devices using Wi-Fi, Bluetooth (Bluetooth, IEEE 802.15.1 technical standard), ZigBee (ZigBee, IEEE 802.15.4 technical standard), etc.

[0131] According to one embodiment, the communication unit (180) can transmit or receive data with external devices, and in particular, can receive video data including video and / or audio from external devices and output the received data to the control unit (190).

[0132] According to one embodiment, the control unit (190) processes user input and / or door opening / closing detection data and / or communication data, and can control the components included in the refrigerator (1) based on the data processing.

[0133] According to one embodiment, the control unit (190) includes a memory (192) for storing / remembering a program and / or data, and a processor (191) for processing user input and / or door opening / closing detection data and / or communication data according to the program and / or data stored in the memory (192).

[0134] According to one embodiment, the memory (192) may store / remember programs and / or data. A program may include a plurality of instructions combined to perform a specific function, and data may be processed and / or manipulated by a plurality of instructions included in the program. Additionally, the programs and / or data may include system programs and / or system data directly related to the operation of the refrigerator (1), and application programs and / or application data that provide convenience to the user.

[0135] According to one embodiment, the memory (192) may include a non-volatile memory that stores a program and / or data for controlling components included in the refrigerator (1), and a volatile memory that stores temporary data generated while controlling components included in the refrigerator (1).

[0136] According to one embodiment, the non-volatile memory may store, for example, programs and / or data electrically, magnetically, or optically. The non-volatile memory may include, for example, ROM (Read Only Memory) or flash memory for storing data for a long period. Additionally, the non-volatile memory may include a solid disk drive (SSD), a hard disk drive (HDD), or an optical disk drive (ODD).

[0137] According to one embodiment, the volatile memory can load programs and / or data from, for example, non-volatile memory and electrically store programs and / or data. The volatile memory may include, for example, S-RAM (Static Random Access Memory), D-RAM (Dynamic Random Access Memory), etc., for temporarily storing data.

[0138] This memory (192) can store / remember programs and data such as an operating system (OS), middleware, and applications, and can provide programs and data to the processor (191) in response to a request from the processor (191).

[0139] According to one embodiment, the processor (191) can process user input of the display (200), detection data of the sensor unit (160), driving data of the door driving module (150), and / or communication data of the communication unit (180) according to a program and / or data stored in the memory (192). Based on the data processing, the processor (191) can generate control signals to control the sensor operation of the sensor unit (160), the driving control of the door driving module (150), and the operation of the communication unit (180).

[0140] FIG. 3 is a cross-sectional view of a portion of a main body forming the exterior of a home appliance according to one embodiment of the present disclosure. For example, FIG. 3 is an enlarged cross-sectional view of a region (S) of the main body (10) of the refrigerator (1) of FIG. 1. For example, FIG. 3 is an enlarged cross-sectional view of a region (S1) of the main body (610) of the washing machine (2) of FIG. 6a.

[0141] Referring to FIG. 3, the configuration of the main body (10) of the home appliance may be partially or entirely the same as the configuration of the main body (10) of the refrigerator (1) in FIG. 1 and FIG. 2. Referring to FIG. 3, the configuration of the main body (10) of the home appliance may be partially or entirely the same as the configuration of the main body (610) of the washing machine (2) in FIG. 6a and FIG. 6b.

[0142] The embodiment of FIG. 3 can be optionally combined with the embodiments of FIG. 1, FIG. 2, and FIG. 5 to 6b.

[0143] Referring to FIG. 3, the main body (10) (e.g., exterior material) forming the exterior of the refrigerator (1) can be formed by press molding with a sheet metal material or injection molding with a resin material.

[0144] According to one embodiment, the main body (10) may include a frame (410) and a coating layer (430) (e.g., coating composition) disposed on the frame (410) (e.g., coated or deposited).

[0145] According to one embodiment, the main body (10) may include a frame (410), a plating layer (420) disposed on the frame (410), and a coating layer (430) (e.g., a coating composition) disposed on the plating layer (420) (e.g., coated or deposited).

[0146] According to one embodiment, the coating layer (430) may have a structure in which a plurality of resin layers are laminated. The coating layer (430) may include a primer layer (or primer resin) (431), a base layer (or base resin) (432), and a clear layer (or clear resin) (433).

[0147] According to one embodiment, a refrigerator (e.g., the refrigerator (1) of FIG. 1) comprises a main body (10) and a door (e.g., the door (30) of FIG. 1), and a coating layer (430) may form a portion of the outer surface of at least one of the outer housing (e.g., the outer housing (12) of FIG. 1) or the door (30) of the main body (10). For example, the outer housing (12) may include an upper cover, left / right covers, or a lower cover, and the coating layer (430) may form a portion of the outer surface of the left / right cover (e.g., the side PCM (front pre-coated metal)) among the covers that can directly provide an aesthetic impression to the user. However, the coating layer (430) is not limited to forming an exterior on the left / right cover, but may be placed (e.g., coated and deposited) on various exteriors that are easily visible from the outside, such as the door (30), the upper cover, or the lower cover.

[0148] According to one embodiment, the frame (410) can be formed to protect the main body (10) of the refrigerator (1) and to have high durability. The frame (410) can support the overall shape of the refrigerator (1). The frame (410) may include at least one of metal or plastic. For example, the frame (410) may be formed of stainless steel (SUS) material.

[0149] According to one embodiment, a plating layer (420) may be disposed on the frame (410). For example, the plating layer (420) formed by chemically treating the outer surface of the frame (410) can improve the corrosion resistance of the main body (10) and improve the durability of the frame (410) including steel.

[0150] According to one embodiment, the plating layer (420) (or chemical treatment layer) may be a zinc plating layer. For example, the zinc plating layer may be formed by performing a zinc coating process on the surface of a frame (410) containing steel to block the steel of the frame (410) from coming into direct contact with oxygen or moisture and to limit (e.g., prevent or reduce) corrosion. The zinc plating layer may increase adhesion to a resin layer, thereby improving bonding strength with a resin layer placed on the zinc plating layer.

[0151] According to one embodiment, the plating layer (420) can be formed on the frame (410) through at least one process of electrogalvanizing, hot-dip galvanizing, zinc spraying, or zinc-aluminum coating.

[0152] According to one embodiment, the coating layer (430) may be disposed on the frame (410) or the plating layer (420). For example, the coating layer (430) may be provided directly on the frame (410), or the coating layer (430) may be provided on the plating layer (420) after the plating layer (420) has been provided on the frame (410).

[0153] According to one embodiment, the coating layer (430) may have a structure in which a plurality of resin layers are laminated, and may be formed by a composite coating process. For example, after one resin layer is applied, a drying and curing process may be performed, and the process may be repeated a specified number of times to form a structure in which a plurality of resin layers are laminated.

[0154] According to one embodiment, the coating layer (430) may include a primer layer (431), a base layer (432), and a clear layer (433). The primer layer (431), the base layer (432), and the clear layer (433) may form a stacked structure.

[0155] According to one embodiment, after a primer layer (431) is applied on a frame (410) or a plating layer (420), a drying and curing process can be performed. Subsequently, after a base layer (432) is applied on the primer layer (431), a drying and curing process can be performed. Subsequently, after a clear layer (433) is applied on the base layer (432), a drying and curing process can be performed. Accordingly, by using a plurality of resin layers, different functional characteristics of each resin layer can be provided to the main body (10) (e.g., exterior material) through the coating layer (430).

[0156] According to one embodiment, the coating layer (430) may be designed to form a base layer (432) and / or a clear layer (433) having low molecular weight characteristics to improve brightness and / or linearity (to have high brightness and / or high linearity), and a primer layer (431) composed of a composite material to improve adhesion and processability that are reduced accordingly.

[0157] According to one embodiment, a primer layer (431), a base layer (432), and a clear layer (433) each form a layer and may be laminated in the order of the primer layer (431), base layer (432), and clear layer (433) on a frame (410) or a plating layer (420). The primer layer (431), base layer (432), and clear layer (433) each have a main component of a petroleum-based resin such as polyethylene or polymethyl methacrylate (PMMA) and / or a bio-based resin such as biomass, and may also include various other components such as resins, additives, or pigments.

[0158] According to one embodiment, a primer layer (431) is formed on a base material to improve adhesion with a base layer (432) and can serve to help the base layer (432) adhere better by improving surface properties. The primer layer (431) can also promote chemical bonding with the base layer (432) to improve the durability and performance of the resin.

[0159] According to one embodiment, the base layer (432) is disposed on the primer layer (431) and may include a first bio-based resin (432a) based on biomass. According to one embodiment, the base layer (432) may be formed based on a combination of multiple resins or a single resin. For example, the resin of the base layer (432) may be a combination of a first petroleum-based resin (not shown) and a first bio-based resin (432a). For example, the resin of the base layer (432) may consist of the first bio-based resin (432a).

[0160] According to one embodiment, the content of the first bio-based resin (432a) of the base layer (432) may be 10 wt% to 100 wt% relative to the total resin weight. For example, the base layer (432) may have a content of the first bio-based resin (432a) of approximately 10 wt% relative to the total resin weight and a content of the first petroleum-based resin of approximately 90 wt%. For example, the base layer (432) may have a content of the first bio-based resin (432a) of approximately 30 wt% relative to the total resin weight and a content of the first petroleum-based resin of approximately 70 wt%. For example, the base layer (432) may have a content of approximately 60 wt% of the first bio-based resin (432a) and approximately 40 wt% of the first petroleum-based resin relative to the total resin weight. For example, the base layer (432) may have a content of approximately 100 wt% of the first bio-based resin (432a) relative to the total resin weight.

[0161] According to one embodiment, when the content of the first bio-based resin (432a) of the base layer (432) is 10 to 99 weight (wt)% relative to the total resin weight, the first bio-based resin (432a) and the first petroleum-based resin may have different average molecular weights (MW), transition temperatures (Tg), and OH values.

[0162] According to one embodiment, the first petroleum-based resin uses a petroleum-based monomer and may include materials derived from petroleum. For example, the first petroleum-based resin may include polyethylene, which can be synthesized from an ethylene monomer. Ethylene can be produced using natural gas extracted primarily from petroleum as a raw material. Additionally, the first petroleum-based resin may include polypropylene, which can be synthesized from a propylene monomer. Propylene can be produced in a petrochemical process. Furthermore, the first petroleum-based resin may include various petroleum-based resins such as polystyrene, polyvinyl chloride (PVC), and polyurethane. However, the petroleum-based monomer used in the first petroleum-based resin is not limited to the above examples and may include various raw materials extractable from a petrochemical process.

[0163] According to one embodiment, the first bio-based resin (432a) is based on a biomass-based monomer and may use a material derived from a biological raw material. For example, the first bio-based resin (432a) may include various biomass monomers such as an acrylic biomass monomer, an ester biomass monomer, an amide biomass monomer, an alcohol biomass monomer, a lignin-based biomass monomer, a sugar-based biomass monomer, and a catechol biomass monomer. The acrylic biomass monomer may include bio-acrylate and may be synthesized based on vegetable oil or glucose. The ester biomass monomer may include biodimethyl terephthalate (bio-DMT) and may be produced from a raw material extracted from crops. The above amide-based biomass monomer may include bio-caprolactam and may be synthesized from plant-based raw materials. The above alcohol-based biomass monomer may include bio-propylene glycol and may be produced by fermenting glycerol. The above lignin-based biomass monomer may include lignin, and lignin may be produced from raw materials extracted from wood. The above sugar-based biomass monomer may include glucose and may be extracted from plant resources (e.g., corn, sugarcane, wheat, potato). The above catechol-based biomass monomer may include catechol and may be extracted from plant resources (e.g., corn, sugarcane, wheat, potato). However, the biomass monomer for the first bio-based resin (432a) is not limited to the above examples and may include various raw materials that can be extracted from renewable resources such as plants and microorganisms.

[0164] Table 1 below shows the average molecular weight (MW), transition temperature (Tg), and OH value of the first petroleum-based resin and the first bio-based resin (432a) of the base layer (432).

[0165]

[0166] According to one embodiment, when the content of the first bio-based resin (432a) of the base layer (432) is 10 wt% to 99 wt% relative to the total resin weight, the first bio-based resin (432a) and the first petroleum-based resin may have different average molecular weights (MW), transition temperatures (Tg), and OH values.

[0167] Referring to [Table 1], the average molecular weight (MW) of the first bio-based resin (432a) may have a smaller value than the average molecular weight (MW) of the first petroleum-based resin. For example, the average molecular weight (MW) of the first bio-based resin (432a) may be approximately 2,000 to 5,000 g / mol. For example, the average molecular weight (MW) of the first bio-based resin (432a) may be approximately 2,000 to 3,000 g / mol. For example, the average molecular weight (MW) of the first bio-based resin (432a) may be approximately 2,500 g / mol. For example, the average molecular weight (MW) of the first petroleum-based resin may be approximately 5,000 to 10,000 g / mol. For example, the average molecular weight (MW) of the first petroleum-based resin may be approximately 5,000 to 6,000 g / mol. For example, the average molecular weight (MW) of the first petroleum-based resin can be approximately 5,500 g / mol.

[0168] Referring to [Table 1], the transition temperature (Tg) of the first bio-based resin (432a) may have a value smaller than the transition temperature (Tg) of the first petroleum-based resin. For example, the transition temperature of the first bio-based resin (432a) may be approximately 10°C, and the transition temperature of the first petroleum-based resin may be approximately 15°C. As the transition temperature is relatively higher, the crosslinking density of the resin may be denser, and chemical resistance and adhesion may be excellent, while as the transition temperature is relatively lower, the coating film may be softened, and processability may be excellent.

[0169] Referring to [Table 1], the OH Value of the first bio-based resin (432a) may have a smaller value than the OH Value of the first petroleum-based resin. For example, the OH Value of the first bio-based resin (432a) may be approximately 20, and the OH Value of the first petroleum-based resin may be approximately 22. The OH Value is an important chemical indicator for evaluating the content and reactivity of hydroxyl groups and can play a key role in the manufacture of polymer compounds. The paint of the present disclosure can design and adjust the physical properties of the product through the OH Value.

[0170] According to one embodiment, when the content of the first bio-based resin (432a) of the base layer (432) is 100 wt% relative to the total resin weight, the first bio-based resin (432a) may have an average molecular weight (MW), a transition temperature (Tg), and an OH Value as disclosed in [Table 1].

[0171] According to one embodiment, the clear layer (433) is disposed on the base layer (432) and may include a second bio-based resin (433a) based on biomass. According to one embodiment, the clear layer (433) may be formed based on a combination of multiple resins or a single resin. For example, the resin of the clear layer (433) may be a combination of a second petroleum-based resin (not shown) and a second bio-based resin (433a). For example, the resin of the clear layer (433) may be composed of the second bio-based resin (433a).

[0172] According to one embodiment, the content of the second bio-based resin (433a) of the clear layer (433) may be 10 wt% to 100 wt% relative to the total resin weight. For example, the clear layer (433) may have a content of the second bio-based resin (433a) of approximately 10 wt% relative to the total resin weight and a content of the second petroleum-based resin of approximately 90 wt%. For example, the clear layer (433) may have a content of the second bio-based resin (433a) of approximately 30 wt% relative to the total resin weight and a content of the second petroleum-based resin of approximately 70 wt%. For example, the clear layer (433) may have a content of approximately 60 wt% of the second bio-based resin (433a) and approximately 40 wt% of the second petroleum-based resin relative to the total resin weight. For example, the clear layer (433) may have a content of approximately 100 wt% of the second bio-based resin (433a) relative to the total resin weight.

[0173] According to one embodiment, when the content of the second bio-based resin (433a) of the clear layer (433) is 10 to 99 weight (wt)% relative to the total resin weight, the second bio-based resin (433a) and the second petroleum-based resin may have different average molecular weights (MW), transition temperatures (Tg), and OH values.

[0174] According to one embodiment, the second petroleum-based resin uses a petroleum-based monomer and may include materials derived from petroleum. For example, the second petroleum-based resin may include poly(methyl methacrylate), PMMA, which can be synthesized through a polymerization reaction from a methyl methacrylate (MMA) monomer. Methyl methacrylate can be produced using compounds derived mainly from petroleum as raw materials. For example, the second petroleum-based resin may include polyethylene, which can be synthesized from an ethylene monomer. Ethylene can be produced using natural gas extracted mainly from petroleum as a raw material. Additionally, the second petroleum-based resin may include polypropylene, which can be synthesized from a propylene monomer. Propylene can be produced in a petrochemical process. In addition to this, the second petroleum-based resin may include various petroleum-based resins such as polystyrene, polyvinyl chloride (PVC), and polyurethane. However, the petroleum-based monomer used in the second petroleum-based resin is not limited to the above examples and may include various raw materials extractable from petrochemical processes.

[0175] According to one embodiment, the second bio-based resin (433a) is based on a biomass-based monomer and may use a material derived from a biological raw material. For example, the second bio-based resin (433a) may include various biomass monomers such as an acrylic biomass monomer, an ester biomass monomer, an amide biomass monomer, an alcohol biomass monomer, a lignin-based biomass monomer, a sugar-based biomass monomer, and a catechol biomass monomer. The acrylic biomass monomer may include bio-acrylate and may be synthesized based on vegetable oil or glucose. The ester biomass monomer may include biodimethyl terephthalate (bio-DMT) and may be produced from a raw material extracted from crops. The above amide-based biomass monomer may include bio-caprolactam and may be synthesized from plant-based raw materials. The above alcohol-based biomass monomer may include bio-propylene glycol and may be produced by fermenting glycerol. The above lignin-based biomass monomer may include lignin, and lignin may be produced from raw materials extracted from wood. The above sugar-based biomass monomer may include glucose and may be extracted from plant resources (e.g., corn, sugarcane, wheat, potato). The above catechol-based biomass monomer may include catechol and may be extracted from plant resources (e.g., corn, sugarcane, wheat, potato). However, the biomass monomer for the second bio-based resin (433a) is not limited to the above examples and may include various raw materials that can be extracted from renewable resources such as plants and microorganisms.

[0176] Table 2 below shows the average molecular weight (MW), transition temperature (Tg), and OH Value of the second bio-based resin (433a) and the second petroleum-based resin of the clear layer (433).

[0177]

[0178] According to one embodiment, when the content of the second bio-based resin (433a) of the clear layer (433) is 10 wt% to 99 wt% relative to the total resin weight, the second bio-based resin (433a) and the second petroleum-based resin may have different average molecular weights (MW), transition temperatures (Tg), and OH values.

[0179] Referring to [Table 2], the average molecular weight (MW) of the second bio-based resin (433a) may have a value greater than the average molecular weight (MW) of the second petroleum-based resin. For example, the average molecular weight (MW) of the second bio-based resin (433a) may be approximately 10,000 to 20,000 g / mol. For example, the average molecular weight (MW) of the second bio-based resin (433a) may be approximately 13,000 to 17,000 g / mol. For example, the average molecular weight (MW) of the second bio-based resin (433a) may be approximately 15,000 g / mol. For example, the average molecular weight (MW) of the second petroleum-based resin may be approximately 1,000 to 3,000 g / mol. The average molecular weight (MW) of the second petroleum-based resin may be approximately 2,000 to 2,600 g / mol. For example, the average molecular weight (MW) of the second petroleum-based resin may be approximately 2,300 g / mol. For example, a resin with an average molecular weight (MW) of approximately 10,000 to 25,000 g / mol of the second petroleum-based resin may also be used.

[0180] Referring to [Table 2], the transition temperature (Tg) of the second bio-based resin (433a) may have a value smaller than the transition temperature (Tg) of the second petroleum-based resin. For example, the transition temperature of the second bio-based resin (433a) may be approximately 14°C, and the transition temperature of the second petroleum-based resin may be approximately 18°C. As the transition temperature is relatively higher, the crosslinking density of the resin may be denser, and chemical resistance and adhesion may be excellent, while as the transition temperature is relatively lower, the coating film may be softened, and processability may be excellent.

[0181] Referring to [Table 2], the OH Value of the second bio-based resin (433a) may have a smaller value than the OH Value of the second petroleum-based resin. For example, the OH Value of the second bio-based resin (433a) may be approximately 30, and the OH Value of the second petroleum-based resin may be approximately 71. The OH Value is an important chemical indicator for evaluating the content and reactivity of hydroxyl groups and can play a key role in the manufacture of polymer compounds. The paint of the present disclosure can design and adjust the physical properties of the product through the OH Value.

[0182] According to one embodiment, when the content of the second bio-based resin (433a) of the clear layer (433) is 100 wt% relative to the total resin weight, the second bio-based resin (433a) may have an average molecular weight (MW), transition temperature (Tg), and OH Value as disclosed in [Table 2].

[0183] According to one embodiment, the base layer (432) and the clear layer (433) may each include a bio-based resin, such as biomass, which is the main resin, along with additional resins, pigments, additives, and / or auxiliary materials such as thinner.

[0184] Table 3 below shows the composition of the bio-based resin (e.g., first bio-based resin (432a), and second bio-based resin (433a)) along with the resin content in the paint (e.g., base layer (432) and clear layer (433)).

[0185]

[0186] According to one embodiment, the base layer (432) and / or the clear layer (433) comprises a resin and a solvent, and the resin may comprise a bio-based resin, a petroleum-based resin, and other impurities (e.g., additives). The content of the resin (e.g., bio-based resin and petroleum-based resin) in the base layer (432) and / or the clear layer (433) may be approximately 60 wt% to 75 wt%. The content of the resin in the base layer (432) and / or the clear layer (433) may be approximately 65 wt% to 70 wt%.

[0187] Referring to [Table 3], the composition within the resin can be confirmed by referring to experimental data in which the content of the first bio-based resin (432a) in the base layer (432) is approximately 5 wt% to 10 wt% relative to the total resin weight, and experimental data in which the content of the second bio-based resin (433a) in the clear layer (433) is approximately 10 wt% to 15 wt% relative to the total resin weight, as "Case 1_bio 10%".

[0188] According to one embodiment, the first bio-based resin (432a) of the base layer (432) of Case 1 and the second bio-based resin (433a) of the clear layer (433) may each include biomass. According to one embodiment, the resin of the base layer (432) of Case 1 and the resin of the clear layer (433) may each include bio-based resin and inorganic additives. According to one embodiment, the resin of the base layer (432) of Case 1 and the resin of the clear layer (433) may each include bio-based resin, petroleum-based resin, inorganic additives, curing agent, defoamer, catalyst, and other additives.

[0189] According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 1 may include ceramic-based materials. According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 1 may include silica (Si) and zirconium (Zr). In the process step, the inorganic additives are added in powder form, and the silica can also be understood as silicon (hereinafter referred to as silica (Si)), and the zirconium can also be understood as zirconia (hereinafter referred to as zirconium (Zr)).

[0190] Generally, when the bio-based resin content increases, the petroleum-based resin content decreases, and chemical resistance and mechanical properties may deteriorate. The base layer (432) of the present disclosure can form a structurally stable coating by combining inorganic additives such as silica (Si) and zirconium (Zr) with the linear structure of a bio-based resin (e.g., biomass). Accordingly, the base layer (432) can improve chemical resistance and mechanical properties by controlling the content of inorganic additives in the resin. The inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio of silica (Si) and zirconium (Zr) as shown in [Table 3].

[0191] According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0192] According to one embodiment, the content of the curing agent in the resin of the base layer (432) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the base layer (432) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0193] According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 1 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 1 may include silica (Si) and zirconium (Zr). Generally, if the bio-based resin content increases, the petroleum-based resin content decreases, and chemical resistance and mechanical properties may decrease. The base layer (432) of the present disclosure can form a structurally stable coating film by combining inorganic additives such as silica (Si) and zirconium (Zr) with the linear structure of a bio-based resin (e.g., biomass). Accordingly, the clear layer (433) can improve chemical resistance and mechanical properties by controlling the content of inorganic additives in the resin. The above inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio of silica (Si) and zirconium (Zr) as shown in [Table 3] above.

[0194] According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0195] According to one embodiment, the content of the curing agent in the resin of the clear layer (433) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0196] Referring to [Table 3], the composition within the resin can be confirmed by referring to experimental data in which the content of the first bio-based resin (432a) in the base layer (432) is approximately 20 wt% to 25 wt% relative to the total resin weight, and experimental data in which the content of the second bio-based resin (433a) in the clear layer (433) is approximately 25 wt% to 30 wt% relative to the total resin weight, as "Case 2_bio 20%".

[0197] According to one embodiment, the first bio-based resin (432a) of the base layer (432) of Case 2 and the second bio-based resin (433a) of the clear layer (433) may each include biomass. According to one embodiment, the resin of the base layer (432) of Case 2 and the resin of the clear layer (433) may each include bio-based resin and inorganic additives. According to one embodiment, the resin of the base layer (432) of Case 2 and the resin of the clear layer (433) may each include bio-based resin, petroleum-based resin, inorganic additives, curing agent, defoamer, catalyst, and other additives.

[0198] According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 2 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 2 may include silica (Si) and zirconium (Zr). Generally, when the bio-based resin content increases, the petroleum-based resin content decreases, and chemical resistance and mechanical properties may deteriorate. The base layer (432) of the present disclosure can form a structurally stable coating film by combining inorganic additives such as silica (Si) and zirconium (Zr) with the linear structure of a bio-based resin (e.g., biomass). Accordingly, the base layer (432) can improve chemical resistance and mechanical properties by controlling the content of inorganic additives in the resin. The above inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio of silica (Si) and zirconium (Zr) as shown in [Table 3] above.

[0199] According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0200] According to one embodiment, the content of the curing agent in the resin of the base layer (432) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the base layer (432) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0201] According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 2 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 2 may include silica (Si) and zirconium (Zr). Generally, if the bio-based resin content increases, the petroleum-based resin content decreases, and chemical resistance and mechanical properties may deteriorate. The base layer (432) of the present disclosure can form a structurally stable coating film by combining inorganic additives such as silica (Si) and zirconium (Zr) with the linear structure of a bio-based resin (e.g., biomass). Accordingly, the clear layer (433) can improve chemical resistance and mechanical properties by controlling the content of inorganic additives in the resin. The above inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio of silica (Si) and zirconium (Zr) as shown in [Table 3] above.

[0202] According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0203] According to one embodiment, the content of the curing agent in the resin of the clear layer (433) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0204] Referring to [Table 3], the composition within the resin can be confirmed by referring to experimental data in which the content of the first bio-based resin (432a) in the base layer (432) is approximately 30 wt% to 35 wt% relative to the total resin weight, and experimental data in which the content of the second bio-based resin (433a) in the clear layer (433) is approximately 35 wt% to 40 wt% relative to the total resin weight, as "Case 3_bio 30%".

[0205] According to one embodiment, the first bio-based resin (432a) of the base layer (432) of Case 3 and the second bio-based resin (433a) of the clear layer (433) may each include biomass. According to one embodiment, the resin of the base layer (432) of Case 3 and the resin of the clear layer (433) may each include bio-based resin and inorganic additives. According to one embodiment, the resin of the base layer (432) of Case 3 and the resin of the clear layer (433) may each include bio-based resin, petroleum-based resin, inorganic additives, curing agent, defoamer, catalyst, and other additives.

[0206] According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 3 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 2 may include silica (Si) and zirconium (Zr). The base layer (432) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives may be manufactured by using silica (Si) and zirconium (Zr) individually or by adjusting the ratio as shown in [Table 3].

[0207] According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0208] According to one embodiment, the content of the curing agent in the resin of the base layer (432) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the base layer (432) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0209] According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 3 may include ceramic-based materials. According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 2 may include silica (Si) and zirconium (Zr). The clear layer (433) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives may be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio as shown in [Table 3].

[0210] According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.4 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0211] According to one embodiment, the content of the curing agent in the resin of the clear layer (433) may be 5.0 wt% to 10.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total weight of the resin.

[0212] Referring to [Table 3], the composition within the resin can be confirmed by referring to experimental data in which the content of the first bio-based resin (432a) in the base layer (432) is approximately 55 wt% to 60 wt% relative to the total resin weight, and experimental data in which the content of the second bio-based resin (433a) in the clear layer (433) is approximately 60 wt% to 65 wt% relative to the total resin weight, as "Case 4_bio 60%".

[0213] According to one embodiment, the first bio-based resin (432a) of the base layer (432) of Case 4 and the second bio-based resin (433a) of the clear layer (433) may each include biomass. According to one embodiment, the resin of the base layer (432) of Case 4 and the resin of the clear layer (433) may each include bio-based resin and inorganic additives. According to one embodiment, the resin of the base layer (432) of Case 4 and the resin of the clear layer (433) may each include bio-based resin, petroleum-based resin, inorganic additives, curing agent, defoamer, catalyst, and other additives.

[0214] According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 4 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 4 may include silica (Si) and zirconium (Zr). The base layer (432) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio as shown in [Table 3].

[0215] According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.2 wt% to 0.3 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0216] According to one embodiment, the content of the curing agent in the resin of the base layer (432) may be 10.0 wt% to 15.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the base layer (432) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 1.0 wt% to 1.5 wt% relative to the total weight of the resin.

[0217] According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 4 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 4 may include silica (Si) and zirconium (Zr). The clear layer (433) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio as shown in [Table 3].

[0218] According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.2 wt% to 0.3 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0219] According to one embodiment, the content of the curing agent in the resin of the clear layer (433) may be 10.0 wt% to 15.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the clear layer (433) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 1.0 wt% to 1.5 wt% relative to the total weight of the resin.

[0220] Referring to [Table 3], the composition within the resin can be confirmed by referring to experimental data in which the content of the first bio-based resin (432a) relative to the total resin weight in the base layer (432) is approximately 100 wt% and experimental data in which the content of the second bio-based resin (433a) relative to the total resin weight in the clear layer (433) is approximately 100 wt%, as "Case 5_bio 100%".

[0221] According to one embodiment, the first bio-based resin (432a) of the base layer (432) of Case 5 and the second bio-based resin (433a) of the clear layer (433) may each include biomass. According to one embodiment, the resin of the base layer (432) of Case 5 and the resin of the clear layer (433) may each include bio-based resin and inorganic additives. According to one embodiment, the resin of the base layer (432) of Case 5 and the resin of the clear layer (433) may each include bio-based resin, petroleum-based resin, inorganic additives, curing agent, defoamer, catalyst, and other additives.

[0222] According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 5 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the base layer (432) in Case 4 may include silica (Si) and zirconium (Zr). The base layer (432) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives may be prepared by using silica (Si) and zirconium (Zr) individually or by adjusting the ratio as shown in [Table 3].

[0223] According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.4 wt% to 0.6 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.3 wt% to 0.4 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0224] According to one embodiment, the content of the curing agent in the resin of the base layer (432) may be 10.0 wt% to 15.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the base layer (432) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 1.5 wt% to 2.0 wt% relative to the total weight of the resin.

[0225] According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 5 may include ceramic materials. According to one embodiment, the inorganic additives in the resin of the clear layer (433) in Case 5 may include silica (Si) and zirconium (Zr). The clear layer (433) can improve chemical resistance and mechanical properties by controlling the content of the inorganic additives in the resin. The inorganic additives can be manufactured by using silica (Si) and zirconium (Zr) individually, or by adjusting the ratio as shown in [Table 3].

[0226] According to one embodiment, the content of the inorganic additive in the resin of the clear layer (433) may be approximately 0.2 wt% to 0.6 wt% relative to the total weight of the resin. According to one embodiment, the content of the inorganic additive in the resin of the base layer (432) may be approximately 0.4 wt% to 0.6 wt% relative to the total weight of the resin. The content of the silica in the inorganic additive may be approximately 0.3 wt% to 0.4 wt% relative to the total weight of the inorganic additive, and the content of the zirconium may be approximately 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

[0227] According to one embodiment, the content of the curing agent in the resin of the clear layer (433) may be 10.0 wt% to 15.0 wt% relative to the total weight of the resin. The content of the defoamer in the resin of the clear layer (433) may be approximately 0.3 wt% to 0.5 wt% relative to the total weight of the resin, and the content of the catalyst may be approximately 1.5 wt% to 2.0 wt% relative to the total weight of the resin.

[0228] Figures 4a and 4b are drawings showing the results of a chemical resistance test on a coating layer of a common household appliance (e.g., refrigerator, washing machine) under specific conditions.

[0229] FIG. 5 is a diagram showing the results of a chemical resistance test on a coating layer of a home appliance (e.g., refrigerator, washing machine) under specific conditions, according to one embodiment of the present disclosure.

[0230] Referring to FIG. 5, the configuration of the main body (10) of the home appliance may be partially or entirely the same as the configuration of the main body (10) of the refrigerator (1) of FIG. 1 and FIG. 2. Referring to FIG. 5, the configuration of the main body (10) of the home appliance may be partially or entirely the same as the configuration of the main body (610) of the washing machine (2) of FIG. 6a and FIG. 6b.

[0231] The embodiment of FIG. 5 can be optionally combined with the embodiments of FIG. 1, FIG. 2, FIG. 3, FIG. 6a, and FIG. 6b.

[0232] According to one embodiment, the main body (10) of a home appliance may include a frame (e.g., the frame (410) of FIG. 3), a plating layer (e.g., the plating layer (420) of FIG. 3) disposed on the frame (410), and a coating layer (e.g., the coating layer (430) of FIG. 3) disposed on the plating layer (420) (e.g., coated or deposited).

[0233] According to one embodiment, the coating layer (430) may have a structure in which a plurality of resin layers are laminated. The coating layer (430) may include a primer layer (or primer resin) (431), a base layer (or base resin) (432), and a clear layer (or clear resin) (433).

[0234] According to one embodiment, a base layer (e.g., base layer (432) of FIG. 3)) may comprise a first bio-based resin (e.g., first bio-based resin (432a) of FIG. 3) based on biomass and inorganic additives. The content of the inorganic additives may be 0.2 wt% to 0.6 wt% relative to the total weight of the resin.

[0235] According to one embodiment, a clear layer (e.g., the clear layer (433) of FIG. 3) may comprise a second biomass-based bio-resin (e.g., the second biomass-based resin (433a) of FIG. 3) and an inorganic additive. The content of the inorganic additive may be 0.2 wt% to 0.6 wt% relative to the total weight of the resin.

[0236] According to one embodiment, the base layer (432) and clear layer (433) containing bio-based resin and inorganic additives may have improved chemical resistance and mechanical properties compared to the base layer and clear layer containing only general bio-based resin.

[0237] [Table 4] below shows the evaluation of the physical properties of the base layer and clear layer, respectively, containing only general bio-based resin.

[0238] Table 5 below shows the evaluation of physical property tests for a base layer (432) and a clear layer (433), each containing a bio-based resin and inorganic additives within the resin, according to one embodiment. The composition of the bio-based resin and inorganic additives in Table 5 may be based on the composition of Table 3.

[0239]

[0240]

[0241] Referring to [Table 4] above, for each of the base layer and clear layer of the coating layer, the experimental data when there is no bio-based resin content relative to the total resin weight is designated as "Control_Petroleum-based Resin", the experimental data when the bio-based resin content relative to the total resin weight is approximately 10 wt% to 15 wt% is designated as "Case #1_bio 10%", and the experimental data when the bio-based resin content relative to the total resin weight is approximately 15 wt% to 20 wt% is designated as "Case #2_bio 15%" to confirm the physical properties.

[0242] Referring to [Table 5] above, for each of the base layer (and clear layer) of the coating layer, experimental data in which the content of bio-based resin relative to the total resin weight is approximately 5 wt% to 10 wt% (and 10 wt% to 15 wt%) is designated as "Case 1_bio 10%", experimental data in which the content of bio-based resin relative to the total resin weight is approximately 20 wt% to 25 wt% (and 25 wt% to 30 wt%) is designated as "Case 2_bio 20%", experimental data in which the content of bio-based resin relative to the total resin weight is approximately 30 wt% to 35 wt% (and 35 wt% to 40 wt%) is designated as "Case 3_bio 30%", and the content of bio-based resin relative to the total resin weight is approximately The physical properties can be verified by designating experimental data with 55 wt% to 60 wt% (and 60 wt% to 65 wt%) as "Case 4_bio 60%" and experimental data with a bio-based resin content of approximately 100 wt% (and 100 wt%) relative to the total resin weight as "Case 5_bio 100%".

[0243] Referring to [Table 4] above, it can be seen that in the processability test, the Control_petroleum-based resin, Case #1_bio 10%, and Case #2_bio 15% were all judged as suitable (OK), but in the hardness, corrosion resistance, and alkali resistance tests, Case #1_bio 10% and Case #2_bio 15% were all judged as unsuitable (NG).

[0244] In comparison, referring to [Table 5] above, it can be confirmed that the Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) and clear layer (433)) containing inorganic additives according to one embodiment of the present disclosure were all judged as suitable (OK) in tests for processability, hardness, corrosion resistance, and alkali resistance.

[0245] Referring to [Table 4] and [Table 5] above, the hardness test measures the surface hardness of the base layer and the clear layer, respectively, and can be verified using a pencil hardness tester. The results measured by the pencil hardness tester can be verified as (weak) 3B, 2B, B, HB, F, H, 2H, 3H ⪋ ​​(strong), and the base layer and clear layer of the coating layer can be understood as having an appropriate judgment (OK) if they are F or higher.

[0246] Referring to [Table 4] above, the results measured by a pencil hardness tester showed that the Control_petroleum-based resin was grade F, and Case #1_bio 10% and Case #2_bio 15% were grade HB, which is lower than the Control_petroleum-based resin and can be confirmed as an unsuitable judgment (NG).

[0247] Referring to [Table 5] above, it can be confirmed that Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) and clear layer (433) containing inorganic additives) are rated as F grade and deemed appropriate (OK). Through the above experiment, it can be confirmed that the coating layer (430) containing inorganic additives along with bio-based resin improves the unstable hardness of a coating layer containing only general bio-based resin, thereby providing mechanical properties (e.g., hardness) suitable for exterior materials.

[0248] Corrosion resistance tests were conducted on each lab specimen of Control_petroleum-based resin, Case #1_bio 10%, and Case #2_bio 15% in [Table 4] above through salt spray tests. Corrosion resistance tests were conducted on each lab specimen of Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) containing inorganic additives, clear layer (433)) in [Table 5] above through salt spray tests.

[0249] The above salt spray test was conducted by spraying a 5% HCl (or NaCl) solution onto the Lab specimens for approximately 8 hours, followed by a rest period of at least 10 hours (e.g., 16 hours) as one cycle, and verifying the results after a total of 5 to 10 cycles. Each Lab specimen was positioned at a 45° angle to prevent the salt from accumulating, and X-cuts were made on the surface of the Lab specimens to verify the experimental results.

[0250] As a result of the corrosion resistance test, swelling occurred within 5 days for each specimen of Case #1_bio 10% and Case #2_bio 15%. In contrast, as a result of the corrosion resistance test, it was confirmed that swelling did not occur for each specimen of Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) and clear layer (433)) containing inorganic additives. Through the above experiment, it can be confirmed that the coating layer (430) containing inorganic additives along with the bio-based resin improves the unstable corrosion resistance of a coating layer containing only general bio-based resin, thereby providing chemical resistance (e.g., corrosion resistance) suitable for exterior materials.

[0251] Alkali resistance tests were conducted by immersing each lab specimen of Control_petroleum-based resin, Case #1_bio 10%, and Case #2_bio 15% in [Table 4] above into a designated solution. Corrosion resistance tests were conducted by immersing each lab specimen of Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) containing inorganic additives, clear layer (433)) in [Table 5] above into a designated solution.

[0252] The above alkali resistance test method involves making a cut in the coated portion of each Lab specimen and immersing it in a 5% NaOH solution for a specified time (e.g., approximately 24 to 48 hours) (e.g., half immersion), after which the adhesion performance can be confirmed as inadequate if swelling, discoloration, or bubbles occur.

[0253] As a result of the alkali resistance test, the specimens of Case #1_bio 10% and Case #2_bio 15% each showed discoloration and swelling (e.g., see Figs. 4a and 4b). In contrast, as a result of the corrosion resistance test, the specimens of Case 1_bio 10%, Case 2_bio 20%, Case 3_bio 30%, Case 4_bio 60%, and Case 5_bio 100% (base layer (432) and clear layer (433) containing inorganic additives) each showed no swelling, discoloration, or bubbles (e.g., see Fig. 5) (increased chemical resistance). Through the above experiments, it can be confirmed that the coating layer (430) containing inorganic additives along with the bio-based resin improves the unstable chemical resistance of a coating layer containing only general bio-based resin, thereby providing chemical resistance (e.g., alkali resistance) suitable for exterior materials.

[0254] A coating layer (e.g., base layer (432), and clear layer (433)) according to one embodiment is used as an exterior material for a refrigerator (1) or a washing machine (2), and the configuration of the washing machine (2) is described below. However, the coating layer (e.g., base layer (432), and clear layer (433)) is not limited to the exterior materials of the refrigerator (1) and the washing machine (2), and can be easily modified and applied to various home appliances that utilize eco-friendly exterior materials, such as robot vacuum cleaners, cooking appliances, or air purifiers.

[0255] FIG. 6a is an external perspective view of a washing machine according to one embodiment of the present disclosure.

[0256] FIG. 6b is a side cross-sectional view of a washing machine according to one embodiment of the present disclosure.

[0257] FIGS. 6a and 6b are drawings intended to describe a washing machine (2), which is one of the household appliances. FIGS. 6a and 6b are drawings illustrated as examples for convenience of explanation, and the scope of rights of this document is not limited thereto.

[0258] According to one embodiment, the washing machine (2) may include a main body (610) that accommodates various components inside. The main body (610) may have an overall cuboidal shape. The main body (610) may include an opening formed on the front (or front cover (610a)). Two or more of the faces of the main body (610) may be formed integrally. Each face of the main body (610) may be manufactured separately and assembled. The main body (610) may be formed, for example, by press molding from a sheet metal material or by injection molding from a resin material.

[0259] According to one embodiment, the main body (610) may include a front cover (610a), an upper cover (610b), left / right side covers (610c), a rear cover (610d), or a lower cover (610e). The components included in the main body (610) may be configured individually or integrally. For example, the left / right side covers (610c) and the rear cover (610d) included in the main body (610) may be formed integrally to form a side-rear cover. The front cover (610a), upper cover (610b), left / right side covers (610c), rear cover (610d), or lower cover (610e) included in the main body (610) may provide an internal housing. The internal housing may include an internal space in which various components constituting the washing machine (2) can be stored or mounted.

[0260] According to one embodiment, at least a portion of the main body (610) may include a steel plate structure. In the main body (610), at least one of the front cover (610a), top cover (610b), left / right side cover (610c), rear cover (610d), or bottom cover (610e) may be composed of a steel plate structure.

[0261] According to one embodiment, a door (620) for opening and closing the opening may be provided in a portion corresponding to the opening of the main body (610). The door (620) may be rotatably connected to a hinge fixed to one side of the main body (610). The door (620) may be provided, for example, with at least a portion being transparent or translucent so that the interior is visible. A user may open and close the door (620) to load laundry into a drum (640) located inside the main body (610) or to take laundry out of the drum (640). The door (620) may be locked by a locking device (not shown) so that it does not open while the washing machine (2) is operating, for example. According to one embodiment, the door (620) may include a door frame (621) and a glass member (622). The glass member (622) may be formed of a transparent reinforced glass material so as to allow viewing of the interior of the main body (610), for example, but the present document is not limited thereto.

[0262] According to one embodiment, the washing machine (2) may include a tub (630) fixedly disposed inside the main body (610). The tub (630) may be formed in a roughly cylindrical shape with one side open. A tub opening (631) may be provided on the front of the tub (630) at a position corresponding to the opening of the main body (610). The tub (630) may store washing water. A drain (632) for draining washing water may be provided at the bottom of the tub (630). The drain (632) may be connected to, for example, a drain section (680).

[0263] According to one embodiment, the washing machine (2) may include a damper (612). The damper (612) may be provided to connect the main body (610) and the tub (630). One side of the damper (612) may be fixed to the inner surface of the main body (610) and the other side may be fixed to the tub (630). The damper (612) may be provided to absorb vibration energy transmitted to the tub (630) and / or the main body (610) when the drum (640) rotates, thereby dampening the vibration.

[0264] According to one embodiment, the washing machine (2) may include a drum (640) provided inside a tub (630). The drum (640) may have a roughly cylindrical shape with one side open. A front plate (643) and a rear plate (644) may be disposed on the front and rear of the drum (640), respectively. A drum opening may be provided in the front plate (643) at a position corresponding to the opening of the main body (610) and the tub opening (631) of the tub (630). The drum (640) may receive laundry. The drum (640) may rotate inside the tub (630) by receiving rotational power from a drive unit (60). While rotating inside the tub (630), the drum (640) may perform washing, rinsing, and / or spin-drying.

[0265] According to one embodiment, the drum (640) may include a lifter (641) and / or a plurality of through holes (642). The lifter (641) may lift the laundry while the drum (640) rotates, causing the laundry to repeatedly rise and fall, thereby allowing multiple sides of the laundry to be washed evenly. The through holes (642) may be passages formed to allow water or laundry water contained in the tub (630) to flow into the interior of the drum (640), or to discharge water or laundry water inside the drum (640) to the outside. In one example, the lifter (641) or the through holes (642) may be omitted.

[0266] According to one embodiment, the washing machine (2) may include a control panel (650) that supports interaction between the user and the washing machine (2). The control panel (650) may be positioned on the front top of the main body (610) as shown in FIG. 6a, but the present invention is not limited thereto. In one example, the control panel (650) may include an input section (651) and a display section (652).

[0267] According to one embodiment, the input unit (651) may include any type of user input means for obtaining user input for controlling the washing machine (2). The user may input power on / off and washing setting information (e.g., start / stop operation, course selection, time selection, etc.) of the washing machine (2) through the input unit (651). According to one embodiment, the input unit (651) may be a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, or a touch switch, but the present document is not limited thereto. For example, the input unit (651) may be in the form of a jog shuttle that the user can grasp and rotate. According to one embodiment, the input unit (651) may include an infrared sensor. The user may input setting information remotely via a remote control, and the input setting information may be received by the input unit (651) as an infrared signal. According to one embodiment, the input unit (651) may include a microphone. Setting information based on the user's voice may be obtained through the microphone.

[0268] According to one embodiment, the display unit (652) may display various washing setting information and / or operating status information of the washing machine (2) entered by the user. The display unit (652) may include various types of display panels, such as LCD, LED, OLED, QLED, Micro LED, etc. For example, the display unit (652) may be implemented as a touch screen with a touch pad provided on the front, and this document is not limited to a specific type of display means. According to one embodiment, the display unit (652) may include any type of audio display means, including a speaker, and may display each of the aforementioned information as an auditory signal through such audio display means. According to one embodiment, the display unit (652) may operate to provide the user with auditory information to guide user input and / or information related to the currently ongoing process. According to one embodiment, the display unit (652) may provide information regarding the total amount of water used during the washing process and / or the amount of water used for each process. For example, the display unit (652) may separately provide information on the amount of water supplied during the washing process and the amount of water supplied during the rinsing process.

[0269] According to one embodiment, the washing machine (2) may include a drive unit (660) for rotating the drum (640). The drive unit (660) may include a motor (661) and a drive shaft (662) for transmitting the driving force generated by the motor (661) to the drum (640). The motor (661) is composed of a fixed stator and a rotor that rotates by electromagnetically interacting with the stator, so as to convert electric force into mechanical rotational force. The rotational force generated by the motor (661) can be transmitted to the drum (640) through the drive shaft (662). The drive shaft (662) may be pressed into the rotor of the motor (661) and arranged to rotate together with the rotor. A portion of the drive shaft (662) may penetrate the rear wall of the tub (630) to connect the drum (640) and the motor (661). The drive unit (60) can rotate the drum (640) in the forward or reverse direction to perform washing, rinsing, and / or spin-drying operations.

[0270] According to one embodiment, the washing machine (2) may include a water supply unit (670) for supplying washing water to a drum (640) and / or a tub (630). The water supply unit (670) may include at least one water supply pipe (671) and at least one water supply valve (672). At least one water supply pipe (671) may be provided to supply washing water into the interior of the tub (630) using an external water supply source. One of the at least one water supply pipe (671) may be connected to a detergent supply device (613) provided within the main body (610). Here, the interior of the detergent supply device (613) may be partitioned into a plurality of spaces, and each space may be provided to receive detergent or rinse agent, etc. Washing water passing through the detergent supply device (613) may be supplied to the tub (630) along with the detergent (or rinse agent) through the detergent supply pipe. At least one of the other water supply pipes (671) can be directly connected to the tub (630). For example, the washing water supplied through the water supply pipe (671) directly connected to the tub (630) can be supplied directly to the tub (630) without passing through an intermediate configuration such as a detergent dispenser.

[0271] According to one embodiment, the washing machine (2) may include a drain section (680) for draining washing water contained in a drum (640) and / or a tub (630). The drain section (680) may include a drain valve (681), a first drain pipe (682), a second drain pipe (683), or a pump chamber (684). The drain section (680) may be positioned, for example, at the bottom of the tub (630) to discharge washing water discharged from the tub (630) to the outside of the washing machine (2).

[0272] According to one embodiment, a drain valve (681) may be provided to open and close a drain (632). When the drain valve (681) is opened, the washing water contained in the tub (630) may flow through the drain (632) to the drain section (680).

[0273] According to one embodiment, the first drain pipe (682) and the second drain pipe (683) may form a flow path that guides the washing water to be discharged to the outside. For convenience of explanation, the upstream end relative to the pump room (684) is referred to as the first drain pipe (682) and the downstream end as the second drain pipe (683). The first drain pipe (682) and the second drain pipe (683) may be formed as a single unit. The first drain pipe (682) may, for example, be connected at one end to the drain (632) and at the other end to the pump room (684). The washing water may move into the pump room (684) along the first drain pipe (682). The second drain pipe (683) may, for example, be connected at one end to the pump room (684) and at the other end to the outside of the washing machine (2). Therefore, the washing water passing through the pump room (684) can be discharged to the outside of the washing machine (2) along the second drain pipe (683).

[0274] According to one embodiment, a pump room (684) is provided at the bottom of a tub (630) to store water or laundry water drained from the tub (630). Inside the pump room (684), for example, a drainage pump (6841) for discharging the stored water or laundry water to the outside may be provided. The water or laundry water pumped by the drainage pump (6841) may be guided to the outside of the main body (610) through a second drain pipe (683).

[0275] According to one embodiment, the washing machine (2) may include a vibration sensor (6106). The vibration sensor (6106) may be placed on the outer surface of the drum (640) to detect vibrations of the drum (640). According to one embodiment, the vibration sensor (6106) may be placed at the front and / or rear of the drum (640). Here, the front of the drum (640) may refer to the direction of the front plate (643), and the rear of the drum (640) may refer to the direction of the rear plate (644). The vibration sensor (6106) may detect vibrations while the drum (640) is rotating, and a control unit (not shown) may calculate the eccentricity value of the drum (640) based on the vibration value measured by the vibration sensor (6106).

[0276] According to one embodiment, the washing machine (2) can measure the eccentricity value at the front of the drum (640) and the eccentricity value at the rear of the drum (640) using a single vibration sensor (6106). For example, the vibration sensor (6106) may be an IMU (Inertial Measurement Unit) sensor (or an inertial measurement device). The IMU sensor may be configured to measure acceleration corresponding to linear motion and angular velocity corresponding to rotational motion for each of the x-axis, y-axis, and z-axis.

[0277] Generally, the body (e.g., exterior material) of an electronic device (e.g., home appliance) may include a frame and a coating layer formed by laminating multiple resin layers disposed on the frame. The coating layer may be manufactured using petroleum-based resins. If the coating layer contains bio-based resins above a certain level, it may be difficult to apply as a paint due to reduced chemical resistance and / or mechanical properties.

[0278] In a home appliance according to one embodiment of the present disclosure, the coating layer of the main body (e.g., exterior material) may be provided in a laminated structure comprising a primer layer, a base layer, and a clear layer. Since the base layer and / or the clear layer comprises an improved bio-based resin based on biomass, a coating that satisfies environmentally friendly and chemically resistant elements may be provided.

[0279] In a home appliance according to one embodiment of the present disclosure, the coating layer of the main body (e.g., exterior material) may be provided in a structure in which a primer layer, a base layer, and a clear layer are laminated. The base layer and / or the clear layer may be configured to include a bio-based resin and inorganic additives to provide a coating layer having chemical resistance and mechanical properties corresponding to those of a petroleum-based resin.

[0280] In a home appliance according to one embodiment of the present disclosure, a coating layer of a body (e.g., exterior material) may be provided in a laminated structure comprising a primer layer, a base layer, and a clear layer. Inorganic additives contained in the base layer and / or the clear layer may include silica and zirconium. The improved base layer and / or clear layer may form a structurally stable coating film (e.g., increased chemical resistance and mechanical properties) by combining inorganic additives such as silica (Si) and zirconium (Zr) with the linear structure of a bio-based resin.

[0281] In a home appliance according to one embodiment of the present disclosure, the coating layer of the main body (e.g., exterior material) may be provided in a structure in which a primer layer, a base layer, and a clear layer are laminated. The base layer and / or the clear layer may provide a coating layer in which an improved bio-based resin based on biomass is contained in a larger amount than a petroleum-based resin, and accordingly, may provide a coating layer that meets eco-friendly needs, is capable of mass production compared to conventional coating, and can reduce production costs.

[0282] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0283] A refrigerator (1) according to one embodiment of the present disclosure may include a main body (10), a door (30) rotatably connected to open and close the main body, and a storage room (20) disposed inside the main body for storing food. The exterior material of the main body may include a frame (410) comprising a metal material, a primer layer (431) disposed on the frame, a base layer (432) disposed on the primer layer and comprising a first bio-resin based on biomass, and a clear layer (433) disposed on the base layer and comprising a second bio-resin based on biomass. Each of the base layer (432) or the clear layer (433) may be configured to contain inorganic additives for mixing with the biomass.

[0284] According to one embodiment, the inorganic additive may include silica (Si) and zirconium (Zr).

[0285] According to one embodiment, the content of the inorganic additives contained in the base layer (432) or the clear layer (433) may be 0.2 wt% to 0.6 wt% relative to the total resin weight.

[0286] According to one embodiment, the silica content of the inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total resin weight, and the zirconium content may be 0.1 wt% to 0.2 wt% relative to the total weight.

[0287] According to one embodiment, the content of the first bio-based resin (432a) of the base layer may be 10 wt% to 100 wt% relative to the total resin weight.

[0288] According to one embodiment, the content of the second bio-based resin (433a) of the clear layer may be 10 wt% to 100 wt% relative to the total resin weight.

[0289] According to one embodiment, the average molecular weight (MW) of the first bio-based resin (432a) of the base layer may be 2,000 to 5,000 g / mol, and the average molecular weight (MW) of the second bio-based resin (433a) of the clear layer may be 10,000 to 20,000 g / mol.

[0290] According to one embodiment, the average molecular weight (MW) of the first petroleum-based resin of the base layer may be 5,000 to 10,000 g / mol, and the average molecular weight (MW) of the second petroleum-based resin of the clear layer may be 1,000 to 3,000 g / mol.

[0291] According to one embodiment, when the content of each of the first bio-based resin of the base layer or the second bio-based resin of the clear layer is 20 wt% to 30 wt% relative to the total resin weight, the content of the inorganic additive in the base layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight, or the content of the inorganic additive in the clear layer may be 0.2 wt% to 0.4 wt% relative to the total resin weight.

[0292] According to one embodiment, when the content of each of the first bio-based resin of the base layer or the second bio-based resin of the clear layer is 55 wt% to 65 wt% relative to the total resin weight, the content of the inorganic additive in the base layer may be 0.3 wt% to 0.5 wt% relative to the total resin weight, or the content of the inorganic additive in the clear layer may be 0.3 wt% to 0.5 wt% relative to the total resin weight.

[0293] According to one embodiment, when the content of each of the first bio-based resin of the base layer or the second bio-based resin of the clear layer is 100 wt% relative to the total resin weight, the content of the inorganic additive in the base layer may be 0.4 wt% to 0.6 wt% relative to the total resin weight, or the content of the inorganic additive in the clear layer may be 0.4 wt% to 0.6 wt% relative to the total resin weight.

[0294] According to one embodiment, the content of the first bio-based resin of the base layer may be 20 wt% to 25 wt% relative to the total resin weight, and the content of the second bio-based resin of the clear layer may be 25 wt% to 30 wt% relative to the total resin weight.

[0295] According to one embodiment, the content of the curing agent in each of the base layer or the clear layer may be 5.0 wt% to 10.0 wt% relative to the total resin weight, the content of the defoamer may be approximately 0.2 wt% to 0.5 wt% relative to the total resin weight, and the content of the catalyst may be approximately 0.5 wt% to 1.0 wt% relative to the total resin weight.

[0296] In a home appliance comprising an exterior material according to one embodiment of the present disclosure, the exterior material may comprise a frame (410) comprising a metal material, a primer layer (431) disposed on the frame, a base layer (432) disposed on the primer layer and comprising a first bio-resin based on biomass, and a clear layer (433) disposed on the base layer and comprising a second bio-resin based on biomass. The content of inorganic additives included in at least one of the base layer (432) or the clear layer (433) may be 0.2 wt% to 0.6 wt% relative to the total weight of the resin.

[0297] According to one embodiment, the inorganic additive may include silica (Si) and zirconium (Zr).

[0298] According to one embodiment, the silica content of the inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total resin weight, and the zirconium content may be 0.1 wt% to 0.2 wt% relative to the total weight.

[0299] According to one embodiment, when the content of each of the first bio-based resin of the base layer and the second bio-based resin of the clear layer is 20 wt% to 30 wt% relative to the total resin weight, the content of the inorganic additive in the base layer is 0.2 wt% to 0.4 wt% relative to the total resin weight, and the content of the inorganic additive in the clear layer is 0.2 wt% to 0.4 wt% relative to the total resin weight.

[0300] A washing machine (2) according to one embodiment of the present disclosure may include a main body (610) having an opening formed on the front, a cylindrical tub (630) disposed inside the main body and formed to contain water, and a drum (640) rotatably disposed inside the tub. The exterior material of the main body may include a frame (410) comprising a metal material, a primer layer (431) disposed on the frame, a base layer (432) disposed on the primer layer and comprising a first bio-resin based on biomass, and a clear layer (433) disposed on the base layer and comprising a second bio-resin based on biomass. The content of inorganic additives included in at least one of the base layer (432) or the clear layer (433) may be 0.2 wt% to 0.6 wt% relative to the total weight of the resin.

[0301] According to one embodiment, the inorganic additive may include silica (Si) and zirconium (Zr).

[0302] According to one embodiment, the silica content of the inorganic additive may be 0.1 wt% to 0.4 wt% relative to the total resin weight, and the zirconium content may be 0.1 wt% to 0.2 wt% relative to the total weight.

[0303] According to one embodiment, when the content of each of the first bio-based resin of the base layer and the second bio-based resin of the clear layer is 20 wt% to 30 wt% relative to the total resin weight, the content of the inorganic additive in the base layer is 0.2 wt% to 0.4 wt% relative to the total resin weight, and the content of the inorganic additive in the clear layer is 0.2 wt% to 0.4 wt% relative to the total resin weight.

Claims

1. In the refrigerator (1), Main body (10); A door (30) connected to the main body and configured to be rotatable to open and close the main body; and It includes a storage room (20) for storing food, which is disposed inside the main body, and The exterior material of the above main body is, A frame (410) including a metal material; Primer layer (431) placed on the above frame; A base layer (432) disposed on the primer layer and comprising a first bio-based resin; and A clear layer (433) disposed on the above base layer and comprising a second bio-based resin, and The base layer (432) and / or the clear layer (433) are a refrigerator containing biomass and inorganic additives.

2. In Paragraph 1, The above inorganic additive comprises silica (Si) and zirconium (Zr), in a refrigerator.

3. In Paragraph 1 or 2, A refrigerator in which the content of the inorganic additive contained in the base layer (432) is 0.2 wt% to 0.6 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive contained in the clear layer (433) is 0.2 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

4. In Paragraph 1 or 2, A refrigerator in which the silica content of the inorganic additive is 0.1 wt% to 0.4 wt% relative to the total weight of the inorganic additive, and the zirconium content of the inorganic additive is 0.1 wt% to 0.2 wt% relative to the total weight of the inorganic additive.

5. In any one of paragraphs 1 through 4, A refrigerator in which the content of the first bio-based resin (432a) of the base layer is 10 wt% to 100 wt% relative to the total weight of the resin of the base layer.

6. In any one of paragraphs 1 through 5, A refrigerator in which the content of the second bio-based resin (433a) of the clear layer is 10 wt% to 100 wt% relative to the total resin weight of the clear layer.

7. In any one of paragraphs 1 through 6, A refrigerator in which the average molecular weight (MW) of the first bio-based resin (432a) is 2,000 to 5,000 g / mol and the average molecular weight (MW) of the second bio-based resin (433a) is 10,000 to 20,000 g / mol.

8. In Paragraph 7, The base layer further comprises a first petroleum-based resin, and the average molecular weight (MW) of the first petroleum-based resin of the base layer is 5,000 to 10,000 g / mol, and / or A refrigerator, wherein the clear layer further comprises a second petroleum-based resin, and the average molecular weight (MW) of the second petroleum-based resin of the clear layer is 1,000 to 3,000 g / mol.

9. In any one of paragraphs 1 through 8, The content of the first bio-based resin of the base layer is 20 wt% to 30 wt% relative to the total resin weight of the base layer and / or the content of each of the second bio-based resins of the clear layer is 20 wt% to 30 wt% relative to the total resin weight of the clear layer, and A refrigerator, wherein the content of the inorganic additive in the base layer is 0.2 wt% to 0.4 wt% relative to the total resin weight of the base layer and / or the content of the inorganic additive in the clear layer is 0.2 wt% to 0.4 wt% relative to the total resin weight of the clear layer.

10. In any one of paragraphs 1 through 8, The content of the first bio-based resin of the base layer is 55 wt% to 65 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin of the clear layer is 55 wt% to 65 wt% relative to the total resin weight of the clear layer, and A refrigerator, wherein the content of the inorganic additive in the base layer is 0.3 wt% to 0.5 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive in the clear layer is 0.3 wt% to 0.5 wt% relative to the total resin weight of the clear layer.

11. In any one of paragraphs 1 through 8, The content of the first bio-based resin of the base layer is 100 wt% relative to the total resin weight of the base layer, and / or the content of the second bio-based resin of the clear layer is 100 wt% relative to the total resin weight of the clear layer, and A refrigerator, wherein the content of the inorganic additive in the base layer is 0.4 wt% to 0.6 wt% relative to the total resin weight of the base layer, and / or the content of the inorganic additive in the clear layer is 0.4 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

12. In any one of paragraphs 1 through 8, The content of the first bio-based resin in the base layer is 20 wt% to 25 wt% relative to the total resin weight of the base layer, and A refrigerator in which the content of the second bio-based resin of the clear layer is 25 wt% to 30 wt% relative to the total resin weight of the clear layer.

13. In Paragraph 11, The above base layer and / or the above clear layer comprises a curing agent, a deformer, and a catalyst, and The content of the curing agent in the base layer is 5.0 wt% to 10.0 wt% relative to the total resin weight of the base layer and / or the content of the curing agent in the clear layer is 5.0 wt% to 10.0 wt% relative to the total resin weight of the clear layer, and The content of the defoamer in the base layer is approximately 0.2 wt% to 0.5 wt% relative to the total resin weight of the base layer and / or the content of the defoamer in the clear layer is approximately 0.2 wt% to 0.5 wt% relative to the total resin weight of the clear layer, and A refrigerator, wherein the content of the catalyst in the base layer is approximately 0.5 wt% to 1.0 wt% relative to the total resin weight of the base layer and / or the content of the catalyst in the clear layer is approximately 0.5 wt% to 1.0 wt% relative to the total resin weight of the clear layer.

14. Regarding home appliances, The above exterior material is, A frame (410) including a metal material; Primer layer (431) placed on the above frame; A base layer (432) disposed on the primer layer and comprising a first bio-based resin; and A clear layer (433) disposed on the base layer and comprising a second bio-based resin, and The base layer (432) and / or the clear layer (433) comprises inorganic additives, A home appliance, wherein the content of the inorganic additives in the base layer (432) is 0.2 wt% to 0.6 wt% relative to the total resin weight of the base layer and / or the content of the inorganic additives in the clear layer (433) is 0.2 wt% to 0.6 wt% relative to the total resin weight of the clear layer.

15. In Paragraph 14, The above-mentioned inorganic additive comprises silica (Si) and zirconium (Zr), in a home appliance.

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