KR102612175B1 - Cup sleeve - Google Patents

Abstract

The present invention relates to a cup sleeve, and more specifically, includes a sleeve body 100 formed with a hollow portion for receiving and supporting a cup, wherein the sleeve body 100 is made of paper (1) and laminated to the paper (1). It is characterized in that it includes a bioplastic film (2), and an antibacterial coating layer (3) formed on the bioplastic film (2). According to the cup sleeve of the present invention, it is hygienic because there is no contamination caused by bacteria, there is no inconvenience during use by increasing the moisture barrier of the sleeve body, and it exhibits excellent insulation properties to keep drinks cold or warm for a long time, preventing environmental pollution. It has the advantage of being preventable.

Description

Cup sleeve{CUP SLEEVE}

The present invention relates to a cup sleeve, and more specifically, the sleeve body is composed of paper, bioplastic film, and an antibacterial coating layer, so it is hygienic because there is no contamination caused by bacteria, and the sleeve body does not get wet, so there is no inconvenience during use. This is about a cup sleeve that can prevent environmental pollution.

In general, paper cups are widely used in coffee shops to accommodate hot coffee or beverages. Most of these paper cups are made for disposable use by molding fairly thin paper, and are designed to be easily consumed after holding beverages and then discarded. Most of these paper cups are made for disposable use by molding fairly thin paper, and are designed to be easily consumed after holding beverages and then discarded.

When a hot beverage is placed in such a paper cup, the hot temperature of the beverage (approximately 80 degrees or more) is transmitted directly to the user's hand through the paper cup, making it difficult to hold the paper cup. Additionally, a lot of time is wasted because you have to wait for the hot beverage in the paper cup to cool to an appropriate temperature for drinking. Therefore, a cup sleeve made of paper, which is formed in a strip shape to surround a paper cup containing a beverage, is used.

Additionally, in order to accommodate cold drinks, most people use thin plastic cups, which also use paper cup sleeves to prevent the cold temperature of the drink from being transferred directly to the user's hands through the plastic cup.

These cup sleeves are mainly in the form of cardboard and are usually folded, but when in use, they are unfolded to create a space in the center and then inserted into the cup.

However, this cup sleeve made of paper is a part that is continuously held by sellers or users, and there is a problem in that it cannot prevent contamination by bacteria and viruses. In addition, when water droplets form on the surface of a cup containing a cold beverage due to a temperature difference, the paper cup sleeve absorbs it and becomes wet, which can easily tear or cause moisture to stick to the user's hands, leaving the smell of paper on the hands. There are inconveniences in use.

To solve this problem, some stores are using a plastic film layer on paper cup sleeves. However, when plastic is mixed with paper material, there is a problem that it does not decompose after being discarded in nature, causing serious environmental pollution.

In addition, these cup sleeves only protect the user's hands from heat or cold when gripped, but have a disadvantage in that beverages such as coffee easily cool down due to lack of insulation.

KR 10-2020-0059091 A KR 10-1901114 B1

Therefore, the purpose of the present invention is to solve the problems of the conventional cup sleeve described above. By composing the sleeve body with paper, bioplastic film, and an antibacterial coating layer, there is no contamination due to bacteria, so it is hygienic, and the sleeve body is hygienic. The goal is to provide a cup sleeve that does not get wet, so there is no inconvenience when using it and prevents environmental pollution.

Another object of the present invention is to provide a cup sleeve that can exhibit excellent insulation properties without causing environmental pollution by forming an insulation layer using coffee grounds.

The cup sleeve of the present invention for achieving the above object includes a sleeve body in which a hollow portion is formed to receive and support a cup, wherein the sleeve body is made of paper, a bioplastic film laminated to the paper, and the bioplastic film. It is characterized by comprising a formed antibacterial coating layer.

The bioplastic film may include plant-derived starch-based biomass, plant-derived cellulose-based biomass, or both. wax; Surfactants; Protein extracted from starfish; shungite powder; and polyethylene.

The antibacterial coating layer is characterized in that it contains lotus extract and ginkgo biloba extract.

An insulating layer is additionally formed between the bioplastic film and the antibacterial coating layer, and the insulating layer includes gelatin, carrageenan, coffee grounds, and fucoidan.

According to the cup sleeve of the present invention, it is hygienic because there is no contamination caused by bacteria, there is no inconvenience during use by increasing the moisture barrier of the sleeve body, and it exhibits excellent insulation properties to maintain the cold or warmth of the beverage for a long time, preventing environmental pollution. It has the advantage of being preventable.

Figure 1 is a perspective view showing the use state of the cup sleeve according to the present invention.
Figure 2 is an exploded view of the sleeve body according to the present invention.
3 to 5 are transverse cross-sectional views of the expanded sleeve body according to the present invention.

Hereinafter, the present invention will be described in detail.

The biggest feature of the present invention is that the sleeve body includes paper, bioplastic film, and an antibacterial coating layer, so it does not cause environmental pollution, is resistant to moisture, so there is no inconvenience in use, and has excellent antibacterial properties to prevent bacterial contamination. It's about being able to do it.

For this purpose, the cup sleeve of the present invention includes a sleeve body 100 in which a hollow portion is formed for receiving and supporting a cup, as shown in FIGS. 1 to 5, wherein the sleeve body 100 includes paper (1) and the paper ( It is characterized in that it includes a bioplastic film (2) laminated on 1), and an antibacterial coating layer (3) formed on the bioplastic film (2).

Hereinafter, the present invention will be described in detail with reference to the attached FIGS. 1 to 5.

First, the sleeve body 100 is formed with a hollow part in which the cup is accommodated and supported as shown in Figures 1 and 2, and is made of a band with a certain width when deployed, and the two ends in the transverse direction are joined to form a ring shape with a hollow part. It is done.

At this time, as shown in Figure 2, the sleeve body 100 may include a joint 110 formed at one end in the transverse direction when deployed, and the joint 110 is attached to the other end to form a hollow in which the cup is accommodated and supported. Wealth is created.

In addition, the sleeve body 100 may be formed in a fan-shaped shape. Accordingly, when both sides in the extending direction are combined, a hollow portion with an upper diameter larger than the lower diameter may be formed, the shape of which is It is natural that it can be transformed into various forms depending on the shape of the cup. That is, the shape, joints, joining method, etc. of the sleeve body 100 are already well known in the field to which this technology belongs, and the present invention does not limit modifications thereof.

In the present invention, the sleeve body 100 is composed of paper (1), bioplastic (2), and antibacterial coating layer (3), as shown in FIG. 3.

First, the paper 1 is a surface in contact with the outer peripheral surface of the cup 10 inserted into the sleeve body 100, and not only absorbs water droplets condensing on the outer peripheral surface of the cup 10, but also absorbs the heat transmitted from the cup 10. It serves to block cold air.

In the present invention, the paper 1 may have a flat shape as shown in Figure 3, but as shown in Figure 4, the shape is wrinkled along the overall transverse direction, that is, the shape of corrugated cardboard with a corrugated medium 12 formed on the base material 11. You can also have With this corrugated cardboard shape, the space 13 formed by the corrugated medium 12 has the function of keeping the beverage warm or cold while accommodating the heat or cold air emitted from the cup 10 inserted into the sleeve. This serves to keep the beverage contained in the cup 10 warm or cold.

In the present invention, the shape of the paper 1 is optional, and the shape is naturally not limited.

In addition, the paper 1 can be any of sc manila paper, vellum paper, art paper, and snow paper, and is not limited thereto, and its thickness is also not limited.

The bioplastic film 2 laminated to the paper 1 not only improves the strength of the sleeve body 100, but also blocks the transfer of moisture absorbed by the paper 1, preventing moisture from being transferred to the user's hands. By doing so, it serves to improve convenience of use.

Conventionally, general synthetic resin films were used for this function, but these synthetic resin films had the disadvantage of causing environmental pollution when disposed of. The present invention applies the bioplastic film (2) to solve these shortcomings.

The bioplastic film 2 refers to a synthetic resin containing biomass as a raw material. By using plant resources in which carbon in the atmosphere is fixed through photosynthesis as a raw material, it suppresses the increase in the concentration of carbon dioxide in the atmosphere, It can reduce the consumption of petroleum, a limited resource, and has the advantage of being environmentally friendly because it is decomposed by microorganisms after disposal.

In the present invention, the bioplastic film 2 can be used without limitation as long as it contains 10 to 90% by weight of biomass. However, considering its biodegradability, physical properties, etc., it is most preferable to configure it as follows.

That is, the bioplastic film 2 may include plant-derived starch-based biomass, plant-derived cellulose-based biomass, or both. wax; Surfactants; Protein extracted from starfish; shungite powder; and polyethylene. More specifically, 10 to 70% by weight of plant-derived starch-based biomass, plant-derived cellulose-based biomass, or both; Wax 5-10% by weight; Surfactant 0.5-5% by weight; 0.5 to 5% by weight of protein extracted from starfish; 0.5-5% by weight of shungite powder; and a remaining amount of polyethylene. Here, the reason for limiting the composition ratio as described above is to take into account biodegradability, antibacterial properties, mechanical properties, etc.

The biomass includes at least one type, most preferably both, of plant-derived starch-based biomass and plant-derived cellulose-based biomass. The starch-based biomass derived from the plant may be, specifically, corn starch, potato starch, sweet potato starch, cassava starch, and modified starches thereof, for example, oxidized starch, cationic starch, cross-linked starch, and starch ester. , may be a starch selected from a combination thereof, or may be a powder obtained by pulverizing plant seeds, stems, roots, and leaves, for example, wheat flour, corn flour, rice flour, glutinous rice flour, potato flour, sweet potato powder, It may be a plant flour selected from cassava flour or a combination thereof. In addition, plant-derived cellulosic biomass may specifically include wood fiber, cotton fiber, grass fiber, reed fiber, bamboo fiber, and modified products thereof, such as carboxymethyl cellulose, carboxyethyl cellulose, and cellulose ester. , cellulose ether, and combinations thereof.

The starch-based biomass forms particles based on hydrogen bonds, and is a hydrophilic material with excellent moisture absorption due to the hydroxyl group attached to the glucose unit, so its moisture content is 10 to 13%, so it has flowability even when heated. does not appear, carbonization occurs in the range of about 220°C, bonding between polymers does not occur, and mechanical properties are poor due to poor interfacial adhesion. Therefore, by using cellulose-based biomass together to solve this problem, it is possible to add functions that prevent binding and carbonization, are strong against alkalis, are resistant to chemicals, and are not eroded by microorganisms. Therefore, in the present invention, it is most preferable that the starch-based biomass and cellulose-based biomass are used in a weight ratio of 10:1 to 5. At this time, the particle size of the biomass is not limited.

The wax serves to connect biomass and polyethylene, and may be one or more selected from paraffin wax, liquid paraffin wax, beeswax, molda wax, candelilla wax, polyethylene wax, and polypropylene wax, but is not limited thereto. .

The surfactant is used to uniformly mix the biomass, shungite powder, etc. with polyethylene, and includes fatty acids such as stearic acid, myristic acid, palmitic acid, arachidic acid, oleic acid, linolenic acid, and hydrogenated fatty acids, glycerin, and butyl. It may be one or more selected from the polyol series such as lene glycol, propylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol, polyethylene glycol, and sorbitol, but is not limited thereto.

The protein extracted from the starfish improves the tensile strength of the bioplastic film (2), increases biodegradability, and also improves antibacterial properties. The method for extracting protein from the starfish is a conventional technique, and its practice is not limited.

The shungite powder is a material containing SiO ₂ (silicate) and C ₆₀ (fullerene) as main components and is used as an inorganic filler. The sunjit has an antioxidant function, an electromagnetic wave blocking function, a purification and decomposition function of contaminants, and a sterilizing and antibacterial function, and provides antibacterial properties to the sleeve body 100. In addition, the shungite also improves moisture barrier properties. In the present invention, elite Sungite as well as normal Sungite can be used as the Sungite powder, and the type is not limited, and the particle size of 0.1 to 5㎛ is sufficient.

And the polyethylene is the main resin of the bioplastic film (2), and can be used regardless of its type, such as LDPE or HDPE.

The bioplastic film 2 has the advantage of excellent biodegradability, excellent antibacterial properties, excellent moisture barrier properties, and improved mechanical properties such as strength.

In the present invention, the bioplastic film 2 may have a thickness of 10 to 300㎛. If the thickness is too thick, the cost increases more than necessary, so it is preferable to form the bioplastic film 2 at the above-mentioned thickness.

The antibacterial coating layer 3 is formed by coating on the bioplastic 2, and is located on the outermost surface of the slab body 100 and is the surface in contact with the user's hand. In other words, the surface in direct contact with the user's hands is easily exposed to bacteria and becomes contaminated, and antibacterial properties are imparted through lotus extract and ginkgo biloba extract included in the antibacterial coating layer 3.

More specifically, the antibacterial coating layer 3 is a composition containing 5 to 25% by weight of polyurethane, 1 to 3% by weight of lead extract, 1 to 3% by weight of ginkgo biloba extract, 0.5 to 15% by weight of anti-settling agent, and the remaining amount of ethanol. It can be formed by applying to the bioplastic film 2 using a gravure roll printing method.

At this time, the lotus extract is manufactured by extracting one or more of lotus root, lotus root, lotus heart, lotus room, lotus leaf, lotus flower, and lotus stem with a solvent, and is used in various foods such as Alkaloids, Flavonoids, Steroids, Tannins, Glycosides, and Polyphenols. It was found that it contains phytochemicals and has excellent antibacterial properties.

The lotus extract is more specifically made by drying one or more of lotus root, lotus root, lotus heart, lotus room, lotus leaf, lotus flower and lotus stem at 20-30°C for 1-3 days, grinding it to 50-200 mesh, and then It can be manufactured by adding 2 to 10 times the weight of a 70 to 80% (v/v) ethanol aqueous solution, extracting at 30 to 85°C for 2 to 24 hours, and then filtering, concentrating and drying, but this must be limited. This does not mean that any method for extracting extracts from known natural products can be applied.

The ginkgo extract is prepared by extracting one or more of ginkgo fruit, ginkgo leaves, and ginkgo stems with a solvent, and contains a large amount of flavonoid glycosides and terpene compounds, thereby exhibiting a strong antibacterial effect. In addition, when used together with the lotus extract, its antibacterial properties are further improved to prevent contamination of the sleeve by bacteria, viruses, etc.

The ginkgo biloba extract can be prepared in the same way as the lotus extract.

The polyurethane may be, for example, an acrylic-modified polyurethane, and the acrylic-modified polyurethane acts as a binder to attach the composition to the bioplastic film 2. The acrylic-modified polyurethane may be an acrylic-modified polyurethane prepared by the following manufacturing method, but this is only an example and it is natural that products known in the field to which this technology belongs can be used.

First, diisocyanate, polyol, and organic solvent can be prepared and then mixed to prepare a mixed solution. The mixed solution is prepared in a ratio of 1 mol of diisocyanate and 0.5 to 1.5 mol of polyol, and The organic solvent may be included in 60 to 70% by weight of the total mixed solution content.

The diisocyanate is toluene diisocyanate (TDI), 4,4'-Diphenylmethane diisocyanate (MDI), hexamethylenediisocyanate (HDI), iso Any one or more selected from the group consisting of Isophorone diisocyanate (IPDI) and 4,4'-Methylenebis(cyclohexyl isocyanate) (HMDI) may be used.

The polyol may be one or more selected from polyether polyol or polyester polyol.

The organic solvent includes toluene, methyl ethyl ketone,

Any one or more selected from the group consisting of ethyl acetate, acetone, and dimethylformamide may be used.

all.

Next, the mixed solution consisting of the diisocyanate, polyol, and organic solvent can be reacted to produce polyurethane having an isocyanate terminal group (Isocyanate terminated polyurethane). The reaction is carried out at a temperature of 83 to 88 ° C. for 3 to 5 hours. It can be done.

Next, 0.1 to 0.5 mol of a monomer (containing hydroxy group) containing a hydroxy group was added to the isocyanate terminated polyurethane, and the mixture was heated at a temperature of 83 to 87° C. Vinyl terminated polyurethane can be produced by reacting for 4 hours. Monomer (containing hydroxy group) is 2-Hydroxyethyl methacrylate, 2-Hydroxypropyl methacrylate, 2-Hydroxypropyl methacrylate Any one or more selected from the group consisting of 2-Hydroxyethyl acrylate and allyl alcohol may be used.

Next, acrylic modified polyurethane can be prepared by adding a monomer to the vinyl terminated polyurethane and reacting at a temperature of 75 to 80°C for 1 to 3 hours. Polyurethane and monomer may be included in a weight ratio of 70 to 90% by weight of polyurethane having a vinyl terminal group and 10 to 30% by weight of monomer, respectively. The monomer may be any one or more selected from the group consisting of styrene, methyl methacrylate, acrylonitrile, acrylic acid, and acrylic monomer.

The anti-settling agent may be used to prevent precipitation of the composition constituting the coating composition and to have dispersion characteristics. For example, the anti-settling agent includes polyester polydimethylsiloxane copolymer (Polyether-polydimethylsiloxane copolymer), dimethylol Any one or more selected from the group consisting of butanoic acid (DMBA), dimethylol propionic acid (DMPA), methylenediethanolamine, and polyethylene oxide derivatives may be used.

And the ethanol is used as a solvent.

The antibacterial coating layer 3 of the present invention configured as described above improves moisture barrier properties while exhibiting excellent antibacterial properties, and its thickness is not limited.

The cup sleeve of the present invention configured as described above has excellent moisture barrier properties and antibacterial properties, and has the advantage of excellent ease of use.

Meanwhile, in the disposable cup sleeve of the present invention, as shown in FIG. 5, an insulating layer 4 may be additionally formed between the bioplastic film 2 and the antibacterial coating layer 3. This is to protect the heat or cold of the beverage contained in the cup 10 inserted into the sleeve body 100, and helps to enjoy hot or cold beverages for a longer period of time.

The insulating layer 4 must have excellent insulating properties while not causing environmental pollution. To this end, the present invention constitutes the insulating layer 4 including gelatin, carrageenan, coffee grounds, and fucoidan.

Here, the gelatin forms a three-layer network structure to provide a high level of thermal insulation, and the carrageenan supports the network structure formed by the gelatin to provide airtightness. In addition, the fucoidan is disposed in the pores between the network structures to fill the pores, thereby improving thermal insulation and also providing antibacterial properties.

At this time, the coffee grounds refer to extracting coffee from roasted coffee beans, drying the remaining residue to a water content of 0.1 to 3%, and grinding it to a particle size of about 1 to 20㎛. The coffee grounds contain a large amount of cellulose. It has excellent insulation performance. In addition, such coffee grounds are difficult to dispose of as they are generated in large quantities at take-out coffee shops, etc., so they can be recycled and can be naturally decomposed when disposed of, so they have the advantage of not causing environmental pollution.

At this time, the insulation layer 4 is made of a composition containing 8 to 10% by weight of gelatin, 8 to 10% by weight of carrageenan, 10 to 30% by weight of coffee grounds, 5 to 10% by weight of fucoidan, and the remaining amount of water. 2) It can be formed by applying it using spin coating, bar coating, spray coating, etc. and then drying it. Here, the drying method is not limited.

In the present invention, the thickness of the insulation layer 4 is not limited and may be about 20 to 300 μm.

In addition, although not explained separately, it is natural that a separate adhesive may be used to bond each layer.

In addition, the slab according to the present invention may further include various configurations other than the slab body 100, and its further implementation is not limited.

Hereinafter, the present invention will be described in detail through specific examples.

(Example 1)

Prepare for SC Manila.

Then, a 200㎛ thick bio polyethylene film was laminated on the SC Manila paper.

At this time, the bio-polyethylene film is 50% by weight of biomass mixed with plant-derived starch-based biomass (corn flour) and plant-derived cellulose-based biomass (carboxyethylcellulose) in a 10:3 weight ratio, and 5% by weight of polyethylene wax. %, 4% by weight glycerin, 3% by weight protein extracted from starfish; 3% by weight of shungite powder; and the remainder of the composition consisting of HDPE were sufficiently kneaded at 200°C, and this was manufactured into a bio-polyethylene film and laminated. The particle size of the proteins extracted from the biomass, shungite powder, and starfish was 0.1 to 3 μm.

And the protein extracted from the starfish was prepared as follows.

Dried Amur starfish (Asterias amurensis) was crushed and selected using a 30 mesh sieve. 400g of the selected starfish and 01M sodium hydroxide were mixed at a ratio of 1:6 (w/v) and stirred for 1 hour. After stirring, the precipitate obtained by centrifugation at 10,000 x g for 20 minutes was washed with tap water. After washing, 05% tartaric acid was added and stirred for 1 hour, centrifuged again at 10,000 x g for 20 minutes, and the precipitate was washed with tap water. After washing, the pH was adjusted to 6 with 1M tartaric acid, homogenized for 30 minutes using an ultrasonicator, and then stirred at 80°C for 3 hours. This was centrifuged again to obtain the supernatant, and then freeze-dried to obtain protein.

Then, the antibacterial coating composition was applied to the laminated bio-polyethylene film, and then dried with hot air at 80°C to form an antibacterial coating layer. More specifically, the antibacterial coating layer is a coating composition containing 10% by weight of acrylic modified polyurethane, 2% by weight of lead extract, 2% by weight of ginkgo biloba extract, 1% by weight of anti-settling agent (DMPA), and the remaining amount of ethanol. After being applied to the surface of the film using gravure roll printing, it is pressed at a roll speed of 50 to 70 m/h, a temperature of 17 to 18 ℃, and a roll pressure of 3 kgf/㎠, and dried in a drying chamber at a temperature of 22 to 23 ℃ for 15 minutes. By drying for a while, an antibacterial coating layer with a thickness of 30㎛ was formed.

The lotus extract was made by drying the lotus meat at 25°C for 2 days, grinding it to 100mesh, adding 5 times the weight of a 70% (v/v) ethanol aqueous solution, extracting at 60°C for 10 hours, filtering, concentrating, and It was prepared by drying. Ginkgo biloba extract was dried at 25°C for 2 days, ground to 100 mesh, then 5 times by weight of 70% (v/v) ethanol aqueous solution was added to it, and then dried for 10 days at 60°C. It was prepared by time extraction, filtration, concentration and drying.

(Example 2)

The same procedure as in Example 1 was carried out, except that the insulation composition was applied to the laminated bio-polyethylene film using a gravure roll printing method, followed by a roll speed of 50-70 m/h, a temperature of 17-18°C, and a roll of 3 kgf/cm2. By pressurizing and drying in a drying chamber at a temperature of 22 to 23° C. for 15 minutes, an insulating layer with a thickness of 100 μm was formed, and an antibacterial coating layer was formed on the insulating layer.

At this time, the insulating composition used was a mixture of 10% by weight of gelatin, 10% by weight of carrageenan, 20% by weight of coffee grounds (moisture content: 1%, particle size: 1-20㎛), 5% by weight of fucoidan, and the remaining amount of water.

(Test Example 1)

The antibacterial properties of Examples 1 and 2 were tested. The results were as shown in Table 1 below.

Test Example 1 Results division BLANK Example 1 Example 2 strain 1 Bacterial count immediately after inoculation 1.0×10 ⁴ - - Bacterial count after 24 hours 2.5×10 ⁴ <0.63 <0.63 Antibacterial activity value - 4.5 4.5 strain 2 Bacterial count immediately after inoculation 1.0×10 ⁴ - - Bacterial count after 24 hours 1.0×10 ⁶ <0.63 <0.63 Antibacterial activity value - 6.1 6.1 Test method: JIS Z 2801:2010, film adhesion method: number of bacteria/cm2, antibacterial activity log
Standard film: Stomacher® 400 POLY-BAG
Test conditions: Measure the number of bacteria after cultivating the test bacterial solution for 24 hours at (35±1)℃, 90% RH.
Antibacterial effect: Antibacterial activity value of 20 or more
Announced strain used: Strain 1-Staphylococcus aureus ATCC 6538P
Strain 2-Escherichia coli ATCC 8739

As shown in Table 1 above, it was confirmed that Examples 1 and 2 according to the present invention had excellent antibacterial activity.

(Test Example 2)

200 ml of 80°C Americano was placed in 30 take-out cups, and 10 cups each were inserted into the sleeves of Examples 1 and 2 and the control group (commercially available cardboard sleeves). After leaving it at room temperature for 30 minutes, the temperature of the coffee contained in the take-out cup inserted into the sleeve was measured, the values were averaged for each sleeve, and the results are shown in Table 2 below.

Test Example 2 Results division Example 1 Example 2 control group Temperature (℃) 63.0 65.7 61.5

As shown in Table 2, it was confirmed that the temperature of the Americano in the cup was higher in Examples 1 and 2 according to the present invention than in the control group. Therefore, it was determined that the cup sleeve according to the present invention helps keep drinks warm.

Although a preferred embodiment of the present invention has been described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features. You will be able to. Therefore, the embodiment described above should be understood in all respects as illustrative and not restrictive.

1: Paper 2: Bioplastic film
3: Antibacterial coating layer 4: Insulating layer
100: Sleeve body

Claims (4)

It includes a sleeve body 100 formed with a hollow portion in which the cup is accommodated and supported,
The sleeve body 100 includes paper (1),
A bioplastic film (2) laminated on the paper (1), and
It includes an antibacterial coating layer (3) formed on the bioplastic film (2),
The bioplastic film (2) is,
10 to 70% by weight of plant-derived starch-based biomass, plant-derived cellulose-based biomass, or both; Wax 5-10% by weight; Surfactant 0.5-5% by weight; 0.5 to 5% by weight of protein extracted from starfish; 0.5-5% by weight of shungite powder; and a remaining amount of polyethylene,
The antibacterial coating layer (3) is,
Contains lotus extract and ginkgo biloba extract,
An insulating layer (4) is additionally formed between the bioplastic film (2) and the antibacterial coating layer (3),
The insulation layer (4) is,
A cup sleeve comprising gelatin, carrageenan, coffee grounds, and fucoidan.
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