KR102115881B1 - Biodegradable paper cup coated with multilayered biodegradable laminating for coffee and beverage - Google Patents

Abstract

The present invention relates to a biodegradable paper cup for multi-layer coating of coffee and beverages with biodegradable lamination, and more specifically, a paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; It relates to a biodegradable paper cup for coffee and beverage multi-layer coating is composed of a biodegradable laminating layer for the gas and moisture barrier coated on the first laminating layer.

Description

Biodegradable paper cup coated with multilayered biodegradable laminating for coffee and beverage}

The present invention relates to a biodegradable paper cup for multi-layer coating of coffee and beverages with biodegradable lamination, and more specifically, a paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; It relates to a biodegradable paper cup for coffee and beverage multi-layer coating is composed of a biodegradable laminating layer for the gas and moisture barrier coated on the first laminating layer.

In general, when a laminating coating layer is formed on paper, the laminating coating layer is formed of a laminating coating layer using various synthetic resins such as PE (LDPE, HDPE) and PP, PVC, and URETHAN resins.

In order to impart plasticity or heat adhesion to such synthetic resins, harmful substances such as plasticizers and adhesive aids are used, and it is known that environmental substances, which are harmful substances, are eluted considerably in hot water.

Particularly, since cup noodles containers or paper cups are in contact with hot water, the problem of dissolving environmental hormones, which are very harmful to the human body, has emerged seriously when using the paper laminated with the above synthetic resin.

In addition, in the case of laminating synthetic resins, it is difficult to decompose for decades when it is buried due to its non-degradability, and in terms of recycling of resources, non-degradable resin films also cause problems in the recycling process, and PVC resin In the case of dioxins, incineration treatment was also difficult.

Accordingly, recently, paper cup containers laminated with biodegradable resin without elution of environmental hormones harmful to the human body have been developed, and are rolled round in Korean Patent Publication No. 10-2007-0068331 (June 29, 2007) so that both ends are overlapped. The upper part of the side paper 10 is rolled outward to form a curling part 11, and the lower part wraps the base vertical part 22, which is bent downward on the outer periphery of the base 20, from the outside to the inside, to the attached disposable paper cup. In, after applying the biodegradable resin to one side of the side paper 10 and the base 20 to a thickness of 002 ~ 007mm, foam at 5 ~ 10 minutes at 120 ~ 130 ℃ biodegradable resin foam layer on one side of the disposable paper cup A disposable paper cup having a biodegradable resin foam layer characterized by forming (40) has been developed.

In addition, in Korea Food Patent 10-0875104 (December 15, 2008) in a food packaging paper coated with a resin composition, a paper feeder 20 having a thickness of 001 to 2 mm capable of packaging food and beverage; 10-75% polylactic acid, 10-75% biodegradable polyester resin, 10-30% biodegradable polyester urethane for reinforcing properties, 005-1% plasticizer and 005-1% compatibilizer and 100% The deficiency in the weight ratio of is composed of a coating layer (10) forming a top layer of a composition for laminating a feeder with a filler, thereby being coated with the coating layer on the surface of the feeder to prevent absorption of moisture and improve the release of moisture. Food packaging papers in which a biodegradable resin composition for laminating coating is applied to a paper is known.

In addition, Korean Patent Publication No. 10-2007-0106679 (November 05, 2007) includes a substrate of a paper substrate on which at least one layer of a first copolyester and at least one layer of a second copolyester are laminated. It is attached on at least one surface of the substrate, where the first layer is an inner layer that provides adhesion to the substrate of a paper substrate, and the second layer prevents adhesion of cooling rolls and blocking in the roll and is more than the first layer. Biodegradable laminates are known, which are outer layers that provide great thermal stability.

In addition, Korean Patent Registration No. 10-1061043 (August 25, 2011) in the biodegradable container made of a sheet-like biodegradable composition obtained by kneading starch, water, plasticizer, binder, the sheet-like biodegradable composition (2 ) Biodegradable container, characterized by laminating the laminated paper (1) made of paper consisting of one or two or more types of royal ivory paper, tracing paper, Korean paper white paper on the inner or both sides of the sheet, and then foam-molding it in one piece. Is known.

However, the paper containers laminated with the biodegradable resin have the advantage of being completely decomposed, but there are disadvantages in that the properties are uneven and the strength is weak. In particular, when the moisture is contacted due to insufficient gas and moisture barrier properties, water is absorbed into the paper. As a result, the strength of the paper container was not only lowered, but the destruction and function of the paper container itself was also problematic.

Korean Patent Publication No. 10-2007-0068331 (June 29, 2007) Korean Registered Patent 10-0875104 (December 15, 2008) Korean Patent Publication No. 10-2007-0106679 (November 05, 2007) Korean Registered Patent 10-1061043 (August 25, 2011)

The present invention to solve the above problems, a paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; It is an object of the present invention to solve the problem of providing a biodegradable paper cup for multi-layer coated coffee and beverages, wherein the biodegradable laminating layer is composed of a second laminating layer for gas and moisture blocking coated on the first laminating layer.

The present invention to solve the above problem, a paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; A biodegradable paper cup for multi-layered biodegradable coffee and beverages, comprising; a second laminating layer for blocking gas and moisture coated on the first laminating layer, as a solution to the problem.

The first adhesive layer is to be formed of at least one aliphatic polycarbonate biodegradable resin selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC) as a solution to the problem.

The first laminating layer is polylactic acid (PLA), polycaprolactone, polyglycolic acid, polybutylene succinate, polybutylene adipate, polyhydroxybutyrate (PHB), poly-3-hydroxy valerate (poly-3-hydroxyvalerate, PBV), polyhydroxybutyrate valerate (PHBV), poly-3-hydroxybutyrate-co-3-hydroxyvalerate (poly- (3-hydroxybutyrate-co-3) -hydroxyvalerate), poly-3-hydroxybutyrate-co-3-hydroxyhexanoate and at least one biodegradable resin and polybutyl selected from the group consisting of poly- (3-hydroxybutyrate-co-3-hydroxyhexanoate) Inorganic hybrid resin in which nano montmorillonite is dispersed in a mixed resin composed of 50 to 70% by weight: 50 to 30% by weight of renadiphate-co-butylene terephthalate (PBAT) or polyethylene carbonate (PEC) It is to be formed as a solution to the problem.

The second laminating layer is colloidal silica; Distilled water; ethanol; PH adjusting agent selected from nitric acid or ammonia water; Vinyl trichlorosilane, vinyl tri (2-methoxyethoxy) silane, vinyl triethoxysilane, vinyl trimethoxysilane, vinyl silane, 3-methacryloxypropyl trimethoxysilane, 2- (3,4- Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidyloxypropylmethyldiethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3 -Aminopropyl methyl dimethoxysilane, 3-aminopropyl triethoxysilane, N-phenyl-3-aminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, 3-chloropropyl trimethoxysilane One or more silane coupling agents; Wetting agents; Leveling agent; to be formed by coating, cured with a coating solution that is formulated to form a solution to the problem.

The second laminating layer is coated with a coating solution composed of ethylene vinyl alcohol (EVOH) resin and cured to form a biodegradable third laminating layer for gas and moisture blocking as a solution to the problem.

Between the first laminating layer, the second laminating layer, and the third laminating layer are formed of one or more aliphatic polycarbonate biodegradable resins selectively selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC). The second biodegradable adhesive layer is formed as a solution to the problem.

The biodegradable paper cup for multi-layer coating of biodegradable coffee and beverage of the present invention has excellent eco-friendly effect that is completely biodegradable upon disposal after use, and in particular, uses montmorillonite having excellent mechanical properties and chemical resistance as a filler. Therefore, it is not only excellent in strength and chemical resistance, but also has excellent gas and moisture barrier properties, so that even if it is in contact with moisture, the paper layer does not absorb moisture, so even if it is used for a long time, the strength of the paper cup is maintained.

1 is a cross-sectional view of a biodegradable paper cup for coffee and beverages coated with a biodegradable lamination of the present invention

The present invention, a paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; A biodegradable paper cup for biodegradable lamination, comprising a multi-layer coated biodegradable paper cup, comprising a gas and a second laminating layer for blocking moisture, which is coated on the first laminating layer.

The first adhesive layer is characterized by being formed of at least one aliphatic polycarbonate biodegradable resin selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC).

The first laminating layer is polylactic acid (PLA), polycaprolactone, polyglycolic acid, polybutylene succinate, polybutylene adipate, polyhydroxybutyrate (PHB), poly-3-hydroxy valerate (poly-3-hydroxyvalerate, PBV), polyhydroxybutyrate valerate (PHBV), poly-3-hydroxybutyrate-co-3-hydroxyvalerate (poly- (3-hydroxybutyrate-co-3) -hydroxyvalerate), poly-3-hydroxybutyrate-co-3-hydroxyhexanoate and at least one biodegradable resin and polybutyl selected from the group consisting of poly- (3-hydroxybutyrate-co-3-hydroxyhexanoate) Inorganic hybrid resin in which nano montmorillonite is dispersed in a mixed resin composed of 50 to 70% by weight: 50 to 30% by weight of renadiphate-co-butylene terephthalate (PBAT) or polyethylene carbonate (PEC) What is formed of is characterized by the technical composition.

The second laminating layer is colloidal silica; Distilled water; ethanol; PH adjusting agent selected from nitric acid or ammonia water; Vinyl trichlorosilane, vinyl tri (2-methoxyethoxy) silane, vinyl triethoxysilane, vinyl trimethoxysilane, vinyl silane, 3-methacryloxypropyl trimethoxysilane, 2- (3,4- Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidyloxypropylmethyldiethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3 -Aminopropyl methyl dimethoxysilane, 3-aminopropyl triethoxysilane, N-phenyl-3-aminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, 3-chloropropyl trimethoxysilane One or more silane coupling agents; Wetting agents; Leveling agent; characterized by the technical composition that is formed by coating, curing with a coating solution that is composed.

On the second laminating layer, it is characterized by a technical configuration that a biodegradable third laminating layer for gas and moisture blocking is further formed by coating and curing with a coating solution composed of ethylene vinyl alcohol (EVOH) resin.

Between the first laminating layer, the second laminating layer, and the third laminating layer are formed of one or more aliphatic polycarbonate biodegradable resins selectively selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC). It is characterized by the technical configuration that the second biodegradable adhesive layer is further formed.

Hereinafter will be described in detail through embodiments and drawings of the present invention so that those skilled in the art to which the present invention pertains can easily practice. However, the present invention may be implemented in various different forms, and is not limited to the embodiments and drawings described herein.

1 shows a cross-sectional view of a biodegradable paper cup for multi-layer coating of coffee and beverages with the biodegradable laminating of the present invention. Referring to FIG. 1, a paper layer 1 forming the outermost paper cup body; A biodegradable first adhesive layer (2) coated on the inner surface of the paper layer; A biodegradable first laminating layer (3) for reinforcing strength coated adhesively on the biodegradable first adhesive layer; And a biodegradable second laminating layer 4 for blocking gas and moisture coated on the first laminating layer.

Here, the biodegradable resin that forms the first biodegradable adhesive layer and the first laminate layer refers to a resin that can be decomposed in a natural aerobic (composting) and anaerobic (embedding) environment, and the biodegradation of the resin is a microbial resin. Occurs when metabolizing to compounds that can be assimilated or substances that are less harmful to the environment. In particular, the biodegradable resins can be biodegradable because of ester bonds that can be hydrolyzed as aliphatic polyesters.

Since the first adhesive layer may be formed of at least one aliphatic polycarbonate biodegradable resin selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC), a detailed description thereof will be omitted.

As the biodegradable resin forming the first laminate layer, polylactic acid (PLA) is typically used, but is not limited thereto, polycaprolactone, polyglycolic acid, polybutylene succinate, polybutylene adipate, Polyhydroxybutyrate (PHB), poly-3-hydroxyvalerate (PBV), polyhydroxybutyrate valerate (PHBV), poly-3-hydroxybutyrate-co -3-hydroxy-valerate (poly- (3-hydroxybutyrate-co-3-hydroxyvalerate), poly-3-hydroxybutyrate-co-3-hydroxyhexanoate (poly- (3-hydroxybutyrate-co-3) -hydroxyhexanoate) may be used.

The biodegradable resins are environmentally friendly, but are susceptible to moisture or moisture and have high gas permeability, so when used for packaging, a separate treatment (for example, metal deposition, lamination with other films, etc.) is required.

Accordingly, the polybutylene adipate-co-butylene terephthalate (PBAT) or polyethylene carbonate (PEC) having excellent gas and moisture barrier properties is 50 to 70% by weight with the biodegradable resin: 50 to 30% by weight Mixing in proportions, and dispersing the nano montmorillonite to form the organic-inorganic hybrid resin formed by the sol-gel process as the first laminating layer is the core configuration of the present invention.

At this time, if it is out of the weight ratio range, there is a disadvantage in that it does not exhibit satisfactory physical properties in gas and moisture barrier properties and biodegradability (composting). In particular, the polybutylene adipate-co-butylene terephthalate (PBAT) or polyethylene When the content of carbonate (PEC) exceeds 50% by weight, biodegradability decreases, and when it is less than 30% by weight, gas and moisture barrier properties decrease, preferably the polybutylene adipate-co-butylene When the content of terephthalate (PBAT) or polyethylene carbonate (PEC) is 40 to 50% by weight, it has excellent gas and moisture barrier properties and biodegradability.

On the other hand, the organic-inorganic hybrid resin means to disperse inorganic nanoparticles, etc. in the polymer, thereby producing a structurally uniform composite material, and these composite materials maintain the flexibility and excellent processability of the organic polymer, and the excellent of the inorganic nanomaterial It is in the spotlight as an excellent material by adding mechanical strength and thermal stability. In particular, in the present invention, it does not degrade gas and moisture barrier properties and exhibits high heat resistance and mechanical strength.

Inorganic nanoparticles used in the organic-inorganic hybrid resin are nano montmorillonite.

The montmorillonite (Montmorillonite) (hereinafter, MMT) is As a clay, it is abundant in nature and is a very useful material from an economic point of view, and has been applied to various uses because it imparts excellent mechanical and chemical resistance.

Particularly, green clay (Smectite Clay) is most commonly used to make nanoparticles suitable for nanocomposite production because it can improve the physical properties with a small amount of addition compared to conventional composite materials in which the size of the dispersed phase reaches ㎜ or ㎚. Is used.

Among the materials used in polymers, nanocomposites that have been researched recently are generally used as nano-sized inorganic particles as reinforcing materials to show excellent mechanical properties, chemical resistance, etc. in smaller amounts than conventional reinforcing agents by increasing the bonding surface area. Among them, research on polymer nanocomposites using MMT is currently being extended to the overall polymer area from the method of inserting low molecular weight monomers between layers.

In the early stages of research on polymer composite materials using MMT, in-situ polymerization was the main research field, but recently, research fields have expanded to thermoset polymers, thermoplastic polymers and rubbers, and the production of polymer / MMT composite materials There are many ways to do this, but the melting and blending method has attracted much attention in recent years for economic reasons.

In addition, the MMT refers to a very soft foliar silicate mineral formed when an aqueous solution having fine crystals known as clay precipitates, and MMT is a layered inorganic material obtained naturally or purified or artificially synthesized. , Platelets with a thickness of 1 ~ 3nm form a layered structure with ionic bonding force or van der Walls attraction. The dispersion of MMT having a layered structure depends on the affinity between the polymer and clay, the manufacturing method, and the degree of organication of the clay. Accordingly, it can be divided into two types: an insertable nanocomposite and a peelable nanocomposite.

The inserted nanocomposite is formed when the MMT layers are separated by a fixed amount, and each layer serves as a reinforcing material for the polymer, and in the peelable nanocomposite, each layer of the MMT is randomly separated or oriented and dispersed within the polymer. It is formed when there is, and each layer of MMT is sufficiently separated and has an irregular orientation to achieve complete interfacial adhesion and consequently provides strength sufficient to improve various properties of the nanocomposite.

In particular, the dispersion of the MMT layer increases the motion and melt viscosity of the polymer chain, and increases the gas and moisture barrier properties of the polymer by lengthening the path of the material through which the MMT individual layer moves, and in addition, the polymer / MMT nanocomposite It has the characteristics of improving mechanical strength, flame retardancy, abrasion resistance, and heat resistance.

On the other hand, the second laminating layer of the present invention is colloidal silica; Distilled water; ethanol; PH adjusting agent selected from nitric acid or ammonia water; Vinyl trichlorosilane, vinyl tri (2-methoxyethoxy) silane, vinyl triethoxysilane, vinyl trimethoxysilane, vinyl silane, 3-methacryloxypropyl trimethoxysilane, 2- (3,4- Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidyloxypropylmethyldiethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3 -Aminopropyl methyl dimethoxysilane, 3-aminopropyl triethoxysilane, N-phenyl-3-aminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, 3-chloropropyl trimethoxysilane One or more silane coupling agents; Wetting agents; Leveling agent; It is formed by coating and curing with a coating solution composed of.

Looking at the manufacturing process of the coating solution for forming the second laminating layer, colloidal silica as a silica precursor, as a hydrolysis solvent, distilled water and ethanol, vinyltrichlorosilane, vinyltri (2-methoxyethoxy) silane, and vinyltree Ethoxysilane, vinyltrimethoxysilane, vinylsilane, 3-methacryloxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidyloxypropylmethyldie Toxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-aminopropyltriethoxysilane, N- A silane mixture is formed by adding one or more silane coupling agents selected from phenyl-3-aminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, and 3-chloropropyl trimethoxysilane, to which nitric acid is formed. Alternatively, a pH-adjusting agent selected from ammonia water and a hydrolysis catalyst are added, and a wetting agent and a leveling agent are added, followed by homogeneous stirring.

Colloidal silica (CS) of nanoparticles stably dispersed in distilled water and ethanol is capable of synthesizing an organic-inorganic hybrid composite material close to glass by sol-gel reaction with the trivalent or tetravalent alkoxy silanes listed above. Do. These composite materials are excellent in the hardness, weather resistance, thick film coating properties, heat resistance, etc. of the coating film and can be used as a coating agent or binder material for surface modification and protection.

In particular, the coating solution for forming the second laminating layer improves gas and moisture barrier properties by densifying the pores on the surface of the resin and the amorphous portion of the biodegradable resin of the first laminating layer.

In addition, as shown in [Fig. 1], the second laminating layer of the present invention is coated with a coating solution composed of ethylene vinyl alcohol (EVOH) resin, cured, and biodegradable third for gas and moisture blocking. The laminating layer 5 may be further formed to compensate for gas and moisture barrier properties.

In addition, in order to strengthen the interfacial adhesion between the laminating layers, between the first laminating layer 3, the second laminating layer 4, and the third laminating layer 5, selectively polyethylene carbonate (PEC), polypropylene A biodegradable second adhesive layer formed of at least one aliphatic polycarbonate biodegradable resin selected from the group consisting of carbonate (PPC) may be further formed.

The biodegradable paper cup for coffee and beverage coated with multi-layered biodegradable according to the present invention has excellent eco-friendly effect that is completely biodegradable upon disposal after use, and in particular, montmorillonite having excellent mechanical properties and chemical resistance as a filler. Not only is it excellent in strength and chemical resistance, it has excellent gas and moisture barrier properties, so even if it is in contact with moisture, it does not absorb moisture in the paper layer, so it has an excellent effect of maintaining the strength of the paper cup even when used for a long time. It has an effect without any problem.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments and drawings disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to describe them, and the scope of the technical spirit of the present invention is not limited by the embodiments and the drawings. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

1: Paper layer
2: First adhesive layer
3: 1st laminating layer
4: 2nd laminating layer
5: 3rd laminating layer

Claims (6)

A paper layer forming the outermost paper cup body; A biodegradable first adhesive layer coated on the inner surface of the paper layer; A biodegradable first laminating layer for strength reinforcement coated adhesively on the biodegradable first adhesive layer; Consisting of, including; a second laminating layer for the gas and moisture barrier coated on the first laminating layer;
The first laminating layer is polylactic acid (PLA), polycaprolactone, polyglycolic acid, polybutylene succinate, polybutylene adipate, polyhydroxybutyrate (PHB), poly-3-hydroxy valerate (poly-3-hydroxyvalerate, PBV), polyhydroxybutyrate valerate (PHBV), poly-3-hydroxybutyrate-co-3-hydroxyvalerate (poly- (3-hydroxybutyrate-co-3) -hydroxyvalerate), poly-3-hydroxybutyrate-co-3-hydroxyhexanoate and at least one biodegradable resin and polybutyl selected from the group consisting of poly- (3-hydroxybutyrate-co-3-hydroxyhexanoate) Organic / inorganic hybrid resin in which nano montmorillonite is dispersed in a mixed resin composed of 50 to 70% by weight: 50 to 30% by weight of ren adipate-co-butylene terephthalate (PBAT) or polyethylene carbonate (PEC) Is formed into,
The second laminating layer is colloidal silica; Distilled water; ethanol; PH adjusting agent selected from nitric acid or ammonia water; Vinyl trichlorosilane, vinyl tri (2-methoxyethoxy) silane, vinyl triethoxysilane, vinyl trimethoxysilane, vinyl silane, 3-methacryloxypropyl trimethoxysilane, 2- (3,4- Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidyloxypropylmethyldiethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3 -Aminopropyl methyl dimethoxysilane, 3-aminopropyl triethoxysilane, N-phenyl-3-aminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, 3-chloropropyl trimethoxysilane One or more silane coupling agents; Wetting agents; Leveling agent; Biodegradable paper cup for coffee and beverage coated with multi-layered biodegradable lamination, characterized by being formed by coating and curing with a coating solution composed of
According to claim 1,
The first adhesive layer is formed of one or more aliphatic polycarbonate biodegradable resins selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC) for coffee and beverage coated with multi-layered biodegradable lamination. Biodegradable paper cups
delete delete According to claim 1,
On the second laminating layer, a biodegradable laminating layer characterized in that a biodegradable third laminating layer for blocking gas and moisture is further formed by coating and curing with a coating solution composed of ethylene vinyl alcohol (EVOH) resin. Coated coffee and beverage biodegradable paper cups
According to any one of claims 1, 2, 5,
Between the first laminating layer, the second laminating layer, and the third laminating layer are formed of one or more aliphatic polycarbonate biodegradable resins selectively selected from the group consisting of polyethylene carbonate (PEC) and polypropylene carbonate (PPC). A biodegradable paper cup for coffee and beverage coated with a multi-layered biodegradable lamination, characterized in that a second biodegradable adhesive layer is further formed.

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