Yogurt aluminum foil lid having no yogurt sticking to aluminum foil lid by using lotus leaf effect material, and manufacturing method for same

Abstract

The present invention provides a yogurt aluminum foil lid having no yogurt sticking to the aluminum foil lid by using a lotus leaf effect material, and a manufacturing method for same, the yogurt aluminum foil lid having disposed on one surface thereof a hot melt layer formed from a wax component and having a pentagonal or hexagonal column structure comprising a plurality of recessed portions, and having a lotus leaf extract coated so as to fill the recessed portions of such hot melt layer, thereby enabling food packed in a container to flow down without sticking to the one surface of the lid of the container even when coming into contact with the one surface.

Description

Yogurt aluminum foil lid that prevents yogurt from sticking to the aluminum foil lid using a lotus leaf effect substance and method for manufacturing the same

[0001] The present invention relates to a yogurt aluminum foil lid that does not have yogurt stuck to it by utilizing a lotus leaf effect material and a method for manufacturing the same. More specifically, the invention relates to a yogurt aluminum foil lid that does not have yogurt stuck to it by utilizing a lotus leaf effect material and a method for manufacturing the same, wherein a hot melt layer made of a wax component and having a columnar structure in the shape of a pentagon or a hexagon is disposed on one surface, and a lotus leaf extract is coated to fill the grooves of the hot melt layer, so that even if food contained in the container comes into contact with one surface of the lid of the container, it can flow down without sticking.

[0002] Various beverages, desserts, or condiments, such as yogurt or cafe latte, are manufactured and sold by placing the contents into plastic or glass containers and attaching a lid to the open top surface of the container to prevent the contents from spilling out.

[0003] Conventionally, the lids of such food containers were simply made of aluminum foil.

[0004] However, since the contents of the container are mostly liquid or viscous foods, lids made simply of aluminum foil cause some of the contents to come into contact with one surface and get stuck.

[0005] The contents stuck to the lid can be scraped off with a spoon or the like, but it is difficult to scrape them off completely, and consequently, the contents are frequently discarded with the lid still attached.

[0006] Moreover, even if the lid is made of recyclable material, it cannot be recycled after separate collection if the contents are attached, so the lid that is discarded in this way cannot be recycled, and if recycling is to be done, there is the inconvenience of having to separately wash the side of the lid that has contents on it.

[0007] The present invention was developed to solve the aforementioned problems, and the main objective of the present invention is to provide a yogurt aluminum foil lid that prevents yogurt from sticking to the lid by utilizing a lotus leaf effect material, which allows food contained in the container to flow down without sticking even if it comes into contact with the lid, and a method for manufacturing the same.

[0008] One aspect of the present invention provides a yogurt aluminum foil lid that does not have yogurt sticking to it using a lotus leaf effect material, comprising: a polypropylene layer; a dry laminating layer disposed on the lower surface of the polypropylene layer; an aluminum foil layer disposed on the lower surface of the dry laminating layer; a hot melt layer disposed on the lower surface of the aluminum foil layer and having a columnar structure in the shape of a pentagon or a hexagon including a plurality of grooves; and a hydrophobic coating portion formed to fill each groove of the hot melt layer, which is made of a lotus leaf extract.

[0009] According to a preferred feature of the present invention, the aluminum foil layer may have a thickness of 30 to 50 μm.

[0010] According to a preferred feature of the present invention, the hot melt layer may be made of wax.

[0011]

[0012] Another aspect of the present invention provides a method for manufacturing a yogurt aluminum foil lid that does not have yogurt sticking to it using a lotus leaf effect material, comprising the steps of: forming an aluminum foil layer, providing a polypropylene sheet and an adhesive, applying the adhesive to one side of the polypropylene layer, and then bonding the aluminum foil layer; applying wax to one side of the aluminum foil layer and drying it to form a hot melt layer having a columnar structure in the shape of a pentagon or a hexagon including a plurality of grooves; and applying a lotus leaf extract to one side of the hot melt layer to form a hydrophobic coating portion that fills each groove of the hot melt layer.

[0013] According to a preferred feature of the present invention, in the step of forming the hot melt layer, the hot melt layer can be formed by melting a solid wax at 220° and applying it to one side of the aluminum foil layer, and then sequentially passing it through four drying tanks having different temperatures.

[0014] According to one embodiment of the present invention, a yogurt aluminum foil lid that does not adhere to the lid by using a lotus leaf effect material has a hot melt layer having a pentagonal or hexagonal columnar structure made of a wax component disposed on the surface facing the inside of the container, and a hydrophobic coating part made of lotus leaf extract coated to fill the grooves of the hot melt layer, so that even if the food contained in the container comes into contact with the inner surface of the lid of the container, it can flow down without sticking, thereby allowing the effect of preventing the contents from sticking to the lid of the food container to be expected.

[0015] Figures 1 and 2 are photographs showing the state after water is sprayed on the bottom surface of a yogurt aluminum foil lid according to one embodiment of the present invention.

[0016] FIG. 3 is a cross-sectional view schematically showing the layer structure of a yogurt aluminum foil lid according to one embodiment of the present invention.

[0017] Figure 4 is a photograph of a lotus leaf.

[0018] Figure 5 shows the surface of a lotus leaf and a water droplet on the lotus leaf magnified under a microscope.

[0019] FIG. 6 is an enlarged view of the bottom surface of a yogurt aluminum foil lid according to one embodiment of the present invention.

[0020] Figure 7 is a magnified view under a microscope after a water droplet was sprayed onto the bottom surface of the foil lid shown in Figure 6.

[0021] Figure 8 is a photograph of a prototype with a yogurt aluminum foil lid manufactured according to the present invention.

[0022] FIG. 9 is a flowchart illustrating a method for manufacturing a yogurt aluminum foil lid that does not have yogurt sticking to it using the lotus leaf effect material of the present invention.

[0023] The objects, features, and advantages of the present invention described above will become more apparent through the following embodiments in connection with the accompanying drawings. The specific structural or functional descriptions below are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described herein.

[0024]

[0025] Since embodiments according to the concept of the present invention may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0026]

[0027] Terms such as "first" and / or "second" may be used to describe various components, but the components are not limited to these terms. For the sole purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0028]

[0029] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions used to describe relationships between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0030]

[0031] The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to specify the existence of the implemented features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0032]

[0033] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0034]

[0035] Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the invention with reference to the attached drawings. Identical reference numerals in each drawing indicate identical components.

[0036]

[0037] FIGS. 1 and 2 are photographs showing the state after water is sprayed on the bottom surface of a yogurt aluminum foil lid that does not have yogurt stuck to it using a lotus leaf effect material according to one embodiment of the present invention, and FIG. 3 is a cross-sectional view schematically showing the layer structure of a yogurt aluminum foil lid that does not have yogurt stuck to it using a lotus leaf effect material according to one embodiment of the present invention.

[0038]

[0039] As seen in FIGS. 1 to 3, a yogurt aluminum foil lid (100) according to one embodiment comprises a polypropylene layer (10), a dry laminating layer (50) disposed on the lower surface of the polypropylene layer (10), an aluminum foil layer (20) disposed on the lower surface of the dry laminating layer (50), a hot melt layer (30) disposed on the lower surface of the aluminum foil layer (20), and a hydrophobic coating portion (40).

[0040]

[0041] The polypropylene layer (10) may have a thickness of 60 to 80 μm, and such polypropylene is produced by polymerizing propylene obtained from petroleum, like polyethylene, with a Ziegler-Natta catalyst, and is made in the same way as low-pressure polyethylene.

[0042] In one embodiment, the yogurt aluminum foil lid (100) has such polypropylene located on the top layer (outer surface layer).

[0043]

[0044] The dry laminating layer (50) serves as an adhesive layer for bonding the polypropylene layer (10) and the aluminum foil layer (20).

[0045] At this time, a material suitable for bonding known polypropylene and aluminum foil together can be used as the adhesive, but the material of the dry laminating layer (50) in the present invention is not limited to a specific material.

[0046]

[0047] The aluminum foil layer (20) is disposed on the lower surface of the dry laminating layer (50) and may have a thickness of 30 to 50 μm.

[0048]

[0049] The hot melt layer (30) is placed on the lower surface of the aluminum foil layer (20).

[0050] At this time, the hot melt layer (30) is formed using a wax component, and the wax may be paraffin or carnauba, and if necessary, the two components may be mixed and used, but the type of wax in the present invention is not limited to these materials.

[0051] Additionally, the hot melt layer (30) may be composed of a structure similar to a honeycomb structure, in which the constituent pattern consists of columns having a pentagonal or hexagonal shape. Accordingly, the hot melt layer (30) may be composed of a grid structure having multiple grooves separated by walls (columns) having a pentagonal or hexagonal shape.

[0052]

[0053] The hydrophobic coating portion (40) is formed to fill the grooves of the hot melt layer (30) on the lower surface of the hot melt layer (30). Accordingly, the lower surface of the yogurt aluminum foil lid (100) can be formed in such a way that the bottom of the hot melt layer (30) and the bottom of the water-repellent coating portion (40) form a single flat surface.

[0054]

[0055] This hydrophobic coating part (40) is made of lotus leaf extract.

[0056] As shown in Figures 4 and 5, the lotus leaf has fine protrusions and possesses superhydrophobic properties, providing a lotus leaf effect, which is a type of water-repellent effect that keeps water droplets in a round shape so that they do not stick to the surface of the lotus leaf but roll off easily.

[0057] Referring to FIGS. 6 and 7, as in one embodiment, when a hydrophobic coating portion (40) is formed with lotus leaf extract on one surface of a yogurt aluminum foil lid (100), even if food contained in the container comes into contact with one surface of the yogurt aluminum foil lid (100), it does not stick and flows down due to the superhydrophobic properties of the hydrophobic coating portion (40), thereby preventing or reducing the sticking of contents to the lid of the food container.

[0058]

[0059] Meanwhile, Fig. 8 is a photograph of a prototype with a yogurt aluminum foil lid manufactured according to the present invention, showing dairy products and cereal contained in a plastic container with the lid partially open.

[0060]

[0061] FIG. 9 is a flowchart illustrating a method for manufacturing a yogurt aluminum foil lid according to the present invention.

[0062]

[0063] Referring to FIG. 9, a yogurt aluminum foil lid according to one embodiment of the present invention can be manufactured through the following method.

[0064]

[0065] First, an aluminum foil layer is formed (S10), a polypropylene sheet and 13g of Coex adhesive are prepared (S20), the adhesive is applied to one side of the polypropylene layer made of the polypropylene sheet (S30), and then the aluminum foil layer is bonded onto the polypropylene sheet with the applied adhesive.

[0066]

[0067] Next, a solid wax is melted at 220° and applied to one side of the aluminum foil layer (S20), and a hot melt layer is formed on one side of the aluminum foil layer by sequentially passing it through four drying tanks arranged in succession with different temperatures (S21).

[0068] At this time, the solid wax may be paraffin or carnauba, and if necessary, a mixture of the two components may be used; however, the type of wax in the present invention is not limited to these materials.

[0069] And, if the above four drying tanks are defined as the first to fourth drying tanks according to the order in which the laminate is inserted, the drying temperature of the first drying tank is set to 80°, the drying temperature of the second drying tank is set to 70°, the drying temperature of the third drying tank is set to 60°, and the drying temperature of the fourth drying tank is set to 50°, and as the laminate coated with wax passes through the first to fourth drying tanks in order in which the temperature is lowered sequentially, a hot melt layer having a column structure in the shape of a pentagon or a hexagon including a plurality of grooves on one surface of the aluminum foil layer can be formed.

[0070]

[0071] Next, a lotus leaf extract is applied to one side of the hot melt layer to form a hydrophobic coating portion that fills each groove of the hot melt layer (S30).

[0072] At this time, the lotus leaf extract is applied while maintaining the laminate with the hot melt layer formed at 23°, and then the laminate with the lotus leaf extract applied is cooled using a refrigerator with water circulation at 10 to 20° and dried at room temperature to complete the yogurt aluminum foil lid.

[0073] Afterward, the finished yogurt aluminum foil lids are rolled up for storage and shipment, and then cut to fit the size of the corresponding container lid for use.

[0074]

[0075] The present invention described above is not limited by the aforementioned embodiments and attached drawings, and it will be obvious to those skilled in the art that various substitutions, modifications, and changes are possible within the scope of the technical concept of the present invention.

[0076] Explanation of the symbols

[0077] 10: Polypropylene layer

[0078] 20: Aluminum foil layer

[0079] 30: Hot melt layer

[0080] 40: Hydrophobic coating part

[0081] 50: Dry laminating layer

[0082] 100: Yogurt aluminum foil lid

Claims

1. Polypropylene layer; A dry laminating layer disposed on the lower surface of the above polypropylene layer; An aluminum foil layer disposed on the lower surface of the above dry laminating layer; A hot melt layer disposed on the lower surface of the aluminum foil layer and having a columnar structure in the shape of a pentagon or a hexagon including a plurality of grooves; and A yogurt aluminum foil lid that prevents yogurt from sticking to the aluminum foil lid using a lotus leaf effect material, comprising: a hydrophobic coating portion formed to fill each groove of the hot melt layer, which is composed of lotus leaf extract.

2. In Paragraph 1, A yogurt aluminum foil lid that does not have yogurt sticking to it by using a lotus leaf effect material, characterized in that the aluminum foil layer has a thickness of 30 to 50 μm.

3. In Paragraph 1, A yogurt aluminum foil lid that does not have yogurt sticking to it by utilizing a lotus leaf effect material, characterized in that the above-mentioned hot melt layer is made of wax.

4. A step of forming an aluminum foil layer, preparing a polypropylene sheet and an adhesive, applying the adhesive to one side of the polypropylene layer, and then bonding the aluminum foil layer; A step of applying wax to one surface of the aluminum foil layer and drying it to form a hot melt layer having a columnar structure in the shape of a pentagon or a hexagon including a plurality of grooves; and A method for manufacturing a yogurt aluminum foil lid that does not have yogurt sticking to it using a lotus leaf effect material, comprising the step of applying a lotus leaf extract to one surface of the hot melt layer to form a hydrophobic coating portion so as to fill each groove of the hot melt layer.

5. In Paragraph 4, In the step of forming the above hot melt layer, A method for manufacturing a yogurt aluminum foil lid that does not have yogurt sticking to it using a lotus leaf effect material, characterized in that the hot melt layer is formed by melting solid wax at 220° and applying it to one side of the aluminum foil layer, and then sequentially passing it through four drying tanks having different temperatures.

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