KR20230009790A - Paper capsule for extracting coffee or beverage - Google Patents

Abstract

The present invention relates to an eco-friendly paper capsule that can be installed in a commercially available capsule coffee machine (compatible), can be used at high pressure, and is recyclable or biodegradable after use as it is made of paper. The paper capsule comprises: a housing (A) in which side paper made of paper is wound or folded and fused; a paper cup bottom (B) inserted into a lower end of the housing and fusion-spliced; and a paper cover (D) fused to the top of the housing.

Description

Paper capsule for extracting coffee or beverage}

The present invention relates to a paper capsule for extracting beverage or coffee, and more particularly, to an eco-friendly paper capsule that can be installed in a commercially available capsule coffee machine and is made of paper and is recyclable or biodegradable after use.

Beverages such as coffee, green tea, barley tea, oriental tea are modern people drinking and enjoying food every day. In particular, coffee is a beverage that adults usually drink at least one cup a day, and is extracted with an espresso machine, capsule coffee, hand drip, cold brew, or the like.

Capsule coffee commercialized under the trademark of Nespresso (Dolce Gusto) is for one-time use, and a small amount of coffee, about 5g to 10g, or 25g, is placed in a container, and coffee is extracted at high temperature and high pressure by putting it in an extraction machine. High pressure of about 10 to 20 bar, held in the capsule. It provides high coffee extraction yield and crema in a short time by extracting coffee within minutes under high temperature conditions of 70℃ or higher.

Korean Patent Registration No. 10-1400596, Korean Patent Publication No. 10-2018-0108596, etc. disclose capsule coffee extracting coffee with pressurization and hot water.

Currently, commercially available capsule coffee uses aluminum, silver foil, plastic (PP), etc. to withstand high temperature and high pressure extraction conditions and prevent oxygen permeation.

Materials used in capsule coffee take decades to hundreds of years to decompose when landfilled, and in the sea, fish eat plastic or capsules and destroy the ecosystem, causing environmental pollution.

In addition, the currently sold capsule coffee contains aluminum, silver foil, and plastic at the same time, so it is difficult to separate and collect, so there is a big problem that the environmental destruction of capsule coffee cannot be prevented even with artificial efforts of people.

For this reason, capsule coffee manufacturers (Nespresso) collect capsule coffee compulsorily in Europe, but the uncollected rate reaches 75%, which is still a source of environmental pollution. , the manufacturer visits and collects it, but the collection rate is low due to a series of processes such as capsule collection (capsule cutting, coffee separation, washing, etc.) .

Meanwhile, capsule coffee manufacturers other than Nespresso, such as Dolce Gusto and Illy, implement a policy of sending capsules collected by users and sent by international mail to an Australian recycling company without such visit collection. In the case of Dolce Gusto or illy, the consumer has to print out the shipping label from the homepage, attach it to the capsule envelope, and send it to the post office, so the participation rate of consumers is very low. There are problems with landfill or incineration.

Korean Patent Registration No. 10-2114730 discloses an eco-friendly paper cartridge for beverage extraction having a container-type body, a filter, and a cover sheet (FIG. 2). The container-type body 10 of the Korean registered patent is manufactured by press molding. The press molding bonding method manufactures a sheet (elongation condition) using pulp (density, pulp type) to meet the molding bonding conditions, blanks (cuts) the sheet, and then heats it between a pair of upper and lower molds. - It is possible to manufacture a cup shape as shown in FIG. 2 by pressing (in press molding, it is common to mark the junction of the top of the housing as a flange).

In order to manufacture a cup shape having a high depth as shown in FIG. 2 of Korean Patent Registration No. 10-2114730, a process of manufacturing a sheet having a high elongation rate is required. For example, in the case of PE coating on one side of paper base paper, plate-shaped products such as lunchboxes with low depth may be possible, but synthetic resin fibers (polyethylene fibers, polyamide fibers, polyethylene terephthalate fibers and polybutylene terephthalate fibers, etc.) are required to be mixed (refer to Korean Patent Registration No. 10-0858041). It is difficult to manufacture the cup shape (manufactured by stretching) of FIG. 2 with pulp alone (PE-coated sheet), which is a paper raw material, and in particular, it is impossible to secure the tensile strength or elongation at break required during stretching. As a result, in order to implement the cartridge of Korean Registered Patent No. 10-2114730, since a sheet material in which synthetic resin is mixed with pulp is used, recycling may be an issue (PE coated paper material is generally recyclable, but in addition to PE, PP, There is no clear regulation when PET is coated, and in particular, paper (paper cups) coated with a PE layer and cartridge products in which PE is mixed with pulp and cured may be difficult to recycle in reality due to different separation conditions). In particular, the cartridge of Korean Patent Registration No. 10-2114730 cannot solve the problem that it takes hundreds of years to decompose the synthetic resin when landfilling when the material is a mixture of synthetic resin and pulp (despite the effect of Korean Patent Registration No. no mention).

In addition, the drawing process of stretching the cup shape of Korean Patent Registration No. 10-2114730 with a press may cause a problem that there is a possibility of breakage during the process (low molding processability) and that the stretching takes several seconds, resulting in low productivity.

On the other hand, in general, paper containers (paper cups, cup noodle containers, beverage cups, food packaging containers, etc.) are manufactured by winding paper and fusing overlapping portions (without press molding). Referring to FIGS. 3 to 5 , a paper container generally includes a housing 1 and a base (bottom) 2 . The housing is joined by overlapping both ends of the side paper by rolling a side paper or a blank (hereinafter referred to as a side paper) made of paper cut into a predetermined shape, and fusing the overlapping portion. In addition, the lower end of the housing is formed with a folded portion folded inward, and an edge of the base is inserted into and fused to the folded portion to form the base to the housing. In addition, the upper end of the housing is rolled outward to form a curling part. Compared to the press molding method, this paper container manufacturing method is fast (paper cups can be made up to 250 to 300 per minute, but press molding requires 10 per minute to elongate a cup structure with a large depth). It has a low speed around ~20) and can be manufactured at a low price.

3 to 5, the paper cup overlaps and has a step in the fused portion (2, 3, 4), and when pressure (water pressure) is applied after the cover is fused to the paper container with the step, it is combined with the cover and the base. The water pressure is concentrated in the fine gaps of the stepped parts 1 and 3, so that the stepped parts can be widened.

In addition, when curling (5) (a process of winding the upper end of the housing outward and folding) the housing with a stepped portion, two layers of paper must be wound in the stepped portion and a single layer of paper must be wound in the rest of the portion except for the stepped portion, so that the same thickness Compared to the process of curling the height, there was a problem that the precision of the machine had to be increased and the defect rate was high.

In addition, when using a paper container as a hot coffee cup or soup container, if the container thickness (paper thickness) is doubled, the thickness of the step becomes 4 times that of the initial paper thickness, making the curling process difficult and equipment cost prohibitive. It rises. Therefore, the current paper container is a situation where the use of thick paper is limited due to the step of the overlapping portion.

In addition, the overlapped paper side surface 5 in b of FIG. 4 is a portion where a barrier layer such as PE is not coated, and when a high temperature and high pressure is applied to the paper container, the extracted coffee liquid (in a high temperature and high pressure state) is transferred to the paper side surface 5 Through this, the overlapped paper penetrated into the inside and the overlapped portion (including step 3 as a result) from the barrier layer 6 was separated and opened. Therefore, existing paper cups have limitations in manufacturing coffee or beverage capsules to which high temperature and high pressure are applied due to overlapped portions.

The present invention is to provide a paper capsule for high pressure in which overlap portions and steps are removed.

The present invention provides an eco-friendly paper capsule coffee that is biodegradable and recyclable without using aluminum or plastic.

The present invention provides a compatible paper coffee capsule capable of extracting coffee even at high pressure (10 bar to 20 bar) and high temperature (70 ° C. or more and less than 90 ° C.) so that it can be installed and used in an existing capsule coffee machine.

The present invention is to provide a paper coffee capsule with high processability and productivity.

The present invention is to provide a paper coffee capsule with high coffee extraction efficiency.

In one aspect, the present invention

A paper capsule for brewing coffee or beverage, said paper capsule comprising:

A housing (A) in which paper side paper is wound or folded and fused;

A paper base (B) inserted into the lower end of the housing and fusion bonded; and

A paper cover (D) fused to the top of the housing,

The housing, base and cover are coated with a thermally adhesive barrier layer on one or both sides,

Ground coffee is filled inside the housing,

The paper base (B) or paper cover (D) is pierceable with a water supply needle mounted on a coffee or beverage capsule extraction machine,

The paper side is overlapped with the same shape of the first paper layer 10 and the second paper layer 20 spaced apart at a predetermined interval, but the two layers are overlapped and fused to each other (L) and the non-overlapped first paper layer An outer portion M of and an outer portion N of the second paper layer,

The housing relates to a paper capsule in which an outer portion M of the first paper layer and an outer portion N of the second paper layer are overlapped and fused.

In the paper (coffee) capsule of the present invention, a plurality of paper side sheets (first paper layer to n paper layers) of the same shape are spaced apart and overlapped at predetermined intervals, and the outer portion of the non-overlapping paper layer is overlapped with the outer portion of the other paper layer by winding them. By welding, it is possible to provide a housing in which overlapping parts and steps do not occur.

The paper capsule of the present invention has no overlapping part and step, so the base and cover are uniformly fused to the side of the housing, so even if water pressure of 15 bar or more is applied by drilling a hole in the cover, the phenomenon of concentration of water pressure in a specific area does not occur (barrier It is also possible to prevent a separation problem between the paper and the barrier layer caused by permeation of the coffee liquid to the side of the paper (uncoated layer). Therefore, the paper container of the present invention can be used as a capsule that can be installed in a high-temperature and high-pressure capsule coffee machine.

Since the housing of the present invention does not have an overlapping portion and a step, the inner housing and the outer housing are in close contact with each other and the entire housing uniformly forms a double layer (in the existing housing, the overlapping portion is formed of a double layer and the remaining portion is formed of one layer), the housing The defect rate in the upper curing process can be significantly reduced.

In the housing of the present invention, a waterproof/heat resistant barrier layer is formed on the inner housing and an oxygen blocking layer is formed on the outer housing to provide sealing (oxygen blocking) and heat resistance necessary for capsule coffee.

That is, the paper capsule of the present invention can withstand high temperature and high pressure, and can also provide an oxygen blocking effect, so it can replace existing plastic or aluminum capsule coffee.

In particular, since the paper capsule of the present invention uses the same material for both the housing and the base paper inserted therein, the consumer can easily separate and discharge it without any separate procedure, and it can be recycled as paper.

That is, since the paper (coffee) capsule of the present invention uses only paper coated with an eco-friendly coating agent or PE, the consumer can wash off the coffee powder remaining inside the paper capsule after coffee extraction and then separate and discharge it with other papers ( You don't have to throw it in the garbage bag).

In addition, when using paper with an eco-friendly coating agent, if it is buried together with coffee powder without separate discharge by consumers, it can be biodegraded within 6 months in a natural state, and even when incinerated, the amount of toxic gas generated significantly compared to existing plastics It causes little to no air pollution.

1 is a diagram of the internal structure of Dolce Gusto capsule coffee.
2 is a cross-sectional view of Korean Patent Registration No. 10-2114730.
3 to 5 are enlarged views of production diagrams, cross-sections, and stepped portions of conventional paper containers.
6 is a view showing overlapping paper side sheets for manufacturing a housing of the present invention.
FIG. 7 is a perspective view and plan schematic view of a housing formed by winding the paper side of FIG. 6 .
8 is an enlarged view of FIG. 7 (after curling) drawn for comparison with FIG.
9 shows that three paper side sheets are overlapped.
10 to 12 are examples of paper capsules manufactured using the housing of FIG. 6 .
13 shows an example of the base (B) and the pressure release part (B1).

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the following descriptions or drawings of the embodiments. That is, terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "include" or "having" described in this specification are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or the It should be understood that the above does not preclude the possibility of the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

6 is a view showing overlapping paper side papers for manufacturing the housing of the present invention, and FIG. 7 is a perspective view and a plan schematic view of a housing formed by winding the paper side papers of FIG. 6, 8 is an enlarged view of FIG. 7 (after curling) drawn for comparison with FIG. 5, FIG. 9 shows overlapping three side sheets of paper, and FIGS. 10 to 12 are manufactured using the housing of FIG. 6 13 shows an example of the base (B) and the pressure release part (B1).

6 to 13, the paper (coffee, beverage) capsule of the present invention includes a housing (A), a paper base (B) and a paper cover (D). The paper capsule of the present invention may further include a curling unit (C), a first paper filter 30, a second paper filter, and a spraying layer 50.

All components forming the paper capsule of the present invention are made of paper.

The paper used for the capsule of the present invention may be cup base paper (cardboard made of 100% bleached chemical pulp), white paper, special paper, packaging paper, etc., but is not necessarily limited thereto.

The paper used in the capsule of the present invention may have a basis weight of 100 to 500 g/m 2 , 150 to 400 g/m 2 , or 150 to 350 g/m 2 , but is not necessarily limited thereto.

A barrier layer (not shown) is formed on one or both sides of the paper. For example, the barrier layer may be coated on paper in an amount of 5 to 50 g/m 2 , 5 to 40 g/m 2 , 5 to 30 g/m 2 , or 5 to 20 g/m 2 , but the content is not necessarily limited thereto.

As the barrier layer, a water-resistant and heat-adhesive coating agent or a thin film may be used without limitation. That is, the present invention does not have any restrictions on the barrier layer if it satisfies the water resistance and thermal adhesiveness conditions.

For example, the barrier layer may be a PE layer, a biodegradable coating layer, or a recyclable eco-friendly coating layer (hereinafter referred to as an eco-friendly coating layer), preferably a biodegradable coating layer or an eco-friendly coating layer, most preferably an eco-friendly coating layer. It may be a coating agent layer.

The paper capsule of the present invention may be coated with polyethylene (PE). Polyethylene-coated paper capsules can be collected together with other papers (newspapers, cardboard, books, etc.) after separating the coffee powder.

In addition, PE-coated paper has a very low plastic (PE) content compared to coffee capsules made of conventional plastic and aluminum, so it can cause relatively less environmental pollution when buried or incinerated.

The biodegradable coating layer is a layer coated with a known biodegradable paper coating agent that can be coated on cup base paper and has physical properties (water resistance, non-toxicity, heat resistance, heat sealability, biodegradability) usable as a paper cup.

In the present invention, paper (cup base paper) coated with a known and commercially available biodegradable paper coating agent may be purchased and used.

A known biodegradable paper coating agent or paper containing the same can be used by referring to Korean Registered Patent Nos. 10-2140079 and 10-2023160 or purchasing eco-friendly paper base paper from Moorim Paper.

The eco-friendly coating layer is a layer in which a known eco-friendly coating agent is coated or formed on paper.

The eco-friendly coating layer is a layer coated with a known eco-friendly paper coating agent having physical properties (water resistance, non-toxicity, heat resistance, heat sealability, biodegradability) usable as cup base paper.

For example, the eco-friendly coating agent has excellent water resistance and heat sealability (thermal adhesiveness), is harmless to the human body for food packaging paper and paper cups, can be recycled as a paper raw material, and has natural degradability without limitation. can be used

For example, the eco-friendly coating agent may refer to Korean Publication No. 10-2020-0115936 and Korean Registration No. 10-1752340. As the paper formed with the eco-friendly coating agent of the present invention, cup base paper with an eco-friendly coating agent manufactured and sold by Repaper Co., Ltd., Hansol Paper Co., Ltd., Hankuk Paper Co., Ltd. (trade name; Green Shield), and Moorim Paper Co., Ltd. can be used. In addition, as the eco-friendly coating agent, a known eco-friendly coating agent produced and sold by Repaper, BASF, etc. may be used.

The paper coffee capsule of the present invention may extract not only pulverized coffee powder but also pulverized beverage powder (a term referring to all solid powders capable of extracting beverages that people can drink, such as tea powder and herbal tea powder). . That is, the contents contained in the paper capsule of the present invention may include not only ground coffee powder but also beverage powder (hereinafter, it may be referred to as a paper coffee capsule or a paper capsule for convenience).

The paper capsule (capsule coffee) of the present invention may be a compatible capsule that can be mounted on a Dolce Gusto machine or Nespresso (hereinafter referred to as a capsule machine).

Accordingly, the paper capsule of the present invention may have a similar overall shape, upper cover diameter and height to those of Dolce Gusto capsule or Nespresso capsule.

Paper capsules contain 5 to 13 grams of ground coffee. It can contain 5~12g and 5~11g.

For example, the paper capsule may have a lid diameter of 50 to 60 mm and about 55 mm, and a height of 30 to 40 mm and about 35 mm. Alternatively, the paper coffee capsule may have a lid diameter of 20 to 50 mm, 20 to 40 mm, or 25 to 40 mm, and a height of about 20 to 40 mm.

The paper capsule of the present invention may be disposable.

The paper capsule of the present invention is coffee at a high temperature (70 to 80 ℃) around 2 ~ 10 bar, 10 ~ 20 bar, 15 ~ 20 bar, or 15 bar, 19 bar, which is the extraction pressure of a known capsule machine (eg, Dolce Gusto, Nespresso) can be extracted.

The housing (A) is formed by winding or folding the paper side. The housing (A) has a column shape (cylinder, square column, etc.), a cup shape (a cylinder with a cross section larger at the top than the bottom) or the opposite shape (a cylinder with a cross section larger at the bottom than the top), a cone shape (a cone shape) in which the top and bottom are through. ), but is not necessarily limited thereto.

Referring to FIG. 6 , the side paper forming the housing of the present invention overlaps the first paper layer 10 and the second paper layer 20 having the same shape with a predetermined distance apart.

The paper side sheet may overlap the first paper layer 10, the second paper layer 20, and the Nth paper layer having the same shape with a predetermined distance apart. Here, N may be 3 to 10, preferably N may be 3 to 6, more preferably 3 to 4.

Hereinafter, for convenience, the present invention will be described only when the first paper layer 10 and the second paper layer 20 are overlapped.

The first paper layer and the second paper layer may be formed by cutting (cutting, blanking) a paper fabric (eg, cup base paper) into a predetermined shape. For example, the first paper layer and the second paper layer may be cut into a rectangular shape for folding a cylindrical shape or a fan shape as shown in FIG. 4 for folding a cup shape.

The first paper layer 10 and the second paper layer have the same shape, and in the present invention, the same shape may have the same shape or the same size.

More specifically, in the housing, the first paper layer 10 and the second paper layer 20 may have the same shape, and the same shape may have the same shape.

In addition, the first paper layer 10 and the second paper layer 20 have the same shape, and the same shape has the same shape, and the side length of the first paper layer 10 forming the height of the housing. (H) and the side length (h) of the second paper layer 20 may be the same.

When the side lengths H and h are different, the heights of the first paper layer 10 and the second paper layer 20 are different, so that the heights of the top or bottom of the inner housing and the outer housing do not match. Therefore, during the curling process of the housing or the inward winding and folding process of forming the bottom support, defects may occur due to thickness errors or uneven parts (even if not defective) may cause damage due to concentration of force during pressing, resulting in high possibility of damage.

6 and 7, the arc L of the first paper layer 10 or the second paper layer 20 forming the (upper) circumference (inner circumference of the circle) of the outer housing and The arc (ℓ) of the second paper layer 20 or the first paper layer 10 forming the upper circumference (inner circumference of a circle) of the inner housing may be the same or may satisfy Equation 1 below. .

[Equation 1]

L = ℓ + t×X

t: thickness of the first paper layer or the second paper layer forming the inner housing

X : a rational number selected from 2.90 to 3.20 or π

The outer housing may be the first paper layer or the second paper layer, the circumference of the outer housing (circumference, based on the inner surface, for convenience, based on the upper circumference) is L, and the circumference (circumference, based on the inner surface) of the inner housing is L , based on the upper circumference for convenience) can be expressed as ℓ.

In the present invention, the circumference of the outer housing may be the same as the circumference of the inner housing. In this case, the first paper layer and the second paper layer may be matched if they are overlapped vertically. For example, referring to FIGS. 6 and 7, even when the circumference of the outer housing and the inner housing are the same, one edge 10a and the other edge 10b of the outer housing may not overlap. However, A fine gap may exist between them. However, even in the case of such a minute gap, the molten barrier layer may fill the minute gap in the process of overlapping and fusion between the outer part M of the first paper layer and the outer part N of the second paper layer.

Also, as shown in Equation 1 above, the circumference of the outer housing may be longer than the circumference of the inner housing by a length considering the thickness and circumferential rate (π).

X is a value considering the paper thickness error, the cut paper size error, and the circumference ratio.

The first paper layer and the second paper layer of the present invention may have the same or different thicknesses or basis weights. The first paper layer and the second paper layer of the present invention may be the same paper or different types of paper. For example, the inner paper layer in contact with food or water (refer to FIG. 7, the second paper layer 20) is a cup base paper, and the outer first paper layer 10 is a cup base paper, white cardboard, special paper, It may be wrapping paper or the like.

A heat-adhesive barrier layer may be coated on one or both surfaces of the first paper layer, the second paper layer, and the N-th paper layer forming the housing.

The barrier layer may refer to the above-described information.

In addition, as the barrier layer, a PE layer, a biodegradable coating layer, an eco-friendly coating layer, as well as a coating layer having oxygen and moisture barrier properties (hereinafter referred to as an oxygen barrier layer) may be used.

For example, the barrier layer (oxygen barrier layer) may be at least one polymer selected from commercially available polyvinyl alcohol, vinylidene chloride polymer, vinyl chloride polymer, and ethylene vinyl alcohol polymer, or a copolymer thereof. Preferably, the barrier layer (oxygen barrier layer) may be polyvinylidene chloride (PVDC), polyvinyl alcohol or a vinylidene chloride polymer.

As the paper coated with the oxygen barrier layer, commercially available Protego manufactured by Hansol Paper may be used.

The paper layer coated with the oxygen barrier layer may include an oxygen barrier layer (polyvinyl chloride or polyvinyl alcohol) and a PE layer sequentially formed on the paper. For example, the paper layer coated with the oxygen barrier layer may be a paper-oxygen barrier layer-PE layer.

Referring to FIG. 7, the barrier layer of the second paper layer 20 in contact with food or water is a PE layer, a biodegradable coating layer or an eco-friendly coating layer, and the outer barrier layer of the first paper layer 10 is oxygen. It may be a blocking layer. In this case, it may have a structure in which a second paper layer (barrier layer (PE, eco-friendly coating layer)-paper) - a first paper layer (PE or eco-friendly paper layer-oxygen barrier layer-paper) is formed from the inside to the outside of the housing.

The paper side paper overlaps the first paper layer 10 and the second paper layer 20 at a predetermined interval. The distance between the first paper layer 10 and the second paper layer 20 is not particularly limited. For example, the distance between the first paper layer 10 and the second paper layer 20 may be 1 mm or more, 2 mm or more, 3 mm or more, 4 mm or more, or 5 mm or more. They may be spaced up to 1/2 (eg 50 mm) apart. Preferably, the distance between the first paper layer 10 and the second paper layer 20 may be 3 mm or more, more preferably 4 mm or more, and most preferably 5 mm or more. If the separation gap is less than 3 mm, the fusion surface where the outer portion M of the first paper layer and the outer portion N of the second paper layer overlap, which will be described later, is small, so that the bonding portions M and N can be separated under pressurized conditions.

Referring to FIGS. 6 and 9 , a region where the first paper layer 10 and the second paper layer 20 overlap may be fused to form a bonding portion S. Fusion in the overlapping area can be performed thermally or ultrasonically over all or part of the overlapping area.

In addition, as the first paper layer 10 and the second paper layer 20 having the same shape are overlapped at a predetermined interval, the non-overlapping outer portion M of the first paper layer and the outer portion M of the second paper layer ( N) can be formed.

The housing A is formed by overlapping and fusion-bonding the outer portion M of the first paper layer 10 and the outer portion N of the second paper layer 20 .

The outer portion M of the first paper layer 10 is an exposed surface of one edge of the first paper layer 10 . The outer portion N of the second paper layer 20 is an exposed surface of one edge of the second paper layer 20 . The outer portions M and N are portions where the first paper layer and the second paper layer do not overlap.

3 to 5, unlike the conventional method of folding one paper layer and fusing the overlapping portion, the housing of the present invention has an inner paper layer (eg, a second paper layer) and an outer paper layer (eg, a second paper layer). Since the outer portion (edge) of the first paper layer is overlapped and fused, there is no overlapping portion between the inner and outer paper layers, and as a result, no stepped portion is generated in the housing.

That is, referring to FIG. 7, one edge 10a and the other edge 10b of the first paper layer (outer paper layer) are in close contact without overlapping, and one edge 20a of the second paper layer 20b, which is the other side edge, is in close contact without overlapping.

Referring to FIG. 9 , the paper side sheets may overlap with a first paper layer 10, a second paper layer 20, and a third paper layer of the same shape spaced apart from each other by a predetermined distance.

The housing may be formed by folding three overlapping paper layers.

The housing consists of a junction (S) in which all three paper layers are overlapped and fused, an outer portion (M) of the non-overlapping first paper layer and an outer portion (N) of the third paper layer, and the first paper layer. An outer portion O of one side of the second paper layer that overlaps and does not overlap with the third paper layer and an outer portion P of the other side of the second paper layer that does not overlap with the first paper layer and does not overlap with the third paper layer provide

In the housing, the outer portion M of the first paper layer and the outer portion P of the second paper layer overlap and are fused, and the outer portion N of the third paper layer and the outer portion O of the second paper layer overlap and are fused together. do.

In the housing formed by FIG. 9, although the three layers overlap, the inner paper layer (third paper layer) is overlapped and fused with the outer portion (edge) of the middle paper layer (second paper layer), and furthermore, Since the outer paper layer (first paper layer) overlaps and fuses with the outer portion (edge) of the middle paper layer (second paper layer), the inner (third) paper layer, the middle (second) paper layer and the outer ( 1) Each paper layer has no overlapping portion.

The base (B) is fused to the lower end of the housing. There is no particular limitation on the bonding method or structure of the base (B).

For example, the base (B) may be inserted into the lower end of the housing or may be fused to surround the outer lower end of the housing.

As shown in FIG. 10(b) or 11, when the base is inserted into the lower end of the housing, the rim is folded, and the rim of the folded base and the lower end of the housing can be folded inward and fused together.

In addition, as shown in FIG. 10A, when the edge is folded while the base is inserted into the lower end of the housing, the edge of the base and the lower end of the housing may be fused to join the base.

Referring to FIG. 8 , since the housing of the present invention does not have an overlapping portion, a joint portion between the housing and the base can provide a uniform joint without steps or steps.

10, 11, and 12 are examples of paper capsules made of the housing (FIGS. 6 to 9) of the present invention, respectively. In addition, paper capsules using the housing of the present invention can be formed in various ways.

Referring to FIG. 10, the paper capsule may include a housing (A), a base (B), and a cover (D). The paper capsule may further include a first paper filter 30, a second paper filter 40, and a spraying layer 50 (see FIG. 12).

Ground coffee powder may be filled inside the housing.

The housing of the present invention may have a curling portion C formed by winding an upper end outward, but the paper capsule of the present invention is not necessarily limited thereto.

For example, in the paper capsule of the present invention, a cover may be formed by inserting paper into the housing without forming a curling part and fusing the folded edge part and the upper end of the housing during the insertion process.

The curling part (C) of the present invention can be formed by curling the entire outer circumference outward to a uniform thickness (height), so that steps (steps) do not occur.

Referring to FIG. 8 , since the curling part C of the present invention provides a top surface of a uniform height without steps or steps, fine gaps are not generated when the cover is fused to the top of the curling part. Therefore, since the paper capsule of the present invention does not generate a fine gap between the top of the housing and the cover, it is possible to block the possibility of outside air inflow during distribution and to prevent water leakage during high-pressure coffee extraction.

In addition, the paper capsule of the present invention may form a cover by inserting paper in a form surrounding the upper surface of the housing and the outside of the upper end (without forming a curling part), and fusing the folded edge part and the upper end of the housing during the insertion process (this case, the cover is a structure that surrounds the outside of the top of the housing).

Referring to FIG. 10 , the first paper filter may be fused to the inside of the housing so as to be positioned on the base B, or may be fused to the upper surface (border) or lower surface of the base paper.

The second paper filter 40 may be located on the upper surface of the base (B).

The spray layer (see 50) may be located below the cover.

The base 20 may have a hole B2 or a pressure release unit B1, but may be formed of a paper film without a hole or a pressure release unit. In this case, the needle of the extraction machine penetrates the base from the bottom. can do.

In the paper capsule of FIG. 10, a water supply needle installed in the capsule extraction machine may pass through the paper cover (D).

As an example, when water is supplied into the housing from the water supply needle, the paper capsule forms a pressure inside the housing to extract the coffee liquid from the ground coffee, and when the pressure reaches a predetermined pressure, the pressure release unit ( B1) is operated so that the coffee extract can be discharged to the outside of the paper base.

For example, the pressure release part B1 may be a groove, scratch or sheath B1 having a predetermined depth and shape in the paper base B.

The groove, scratch or sheath (B1) is formed to a predetermined depth in the pressure generating layer (B) and has a through-hole structure or a closed bottom structure.

The depth of the sheath 41a may be selected in consideration of the thickness of the paper base and the water pressure applied by the capsule machine (15 bar in the case of Dolce Gusto).

Referring to FIG. 11 , the first paper filter 30 may have a basket shape.

Referring to FIG. 12 , the second paper filter 40 is attached to the upper surface of the base B, and the first paper filter 30 spaced apart by a predetermined distance may be formed thereon.

The first paper filter 30 prevents coffee powder from being discharged to the outside of the housing, and the second paper filter 40 is ruptured when pressure is formed to discharge the coffee liquid to the outside.

Ground coffee powder may be filled inside the housing.

The base (B) or the cover (D) may be a double layer (a first base, a second base, a first cover, and a second cover) of the same shape. The first base or cover located inside the paper container may have a PE layer, a biodegradable coating layer, or an eco-friendly coating layer formed on the paper. In the second base or cover bonded to the first base or cover, an oxygen barrier layer may be coated on paper or an oxygen barrier layer and a PE layer or an eco-friendly coating layer may be formed on paper.

The base (B) or cover (D) may be a single paper layer. The paper base may be formed in the order of paper, oxygen barrier layer, PE layer (or eco-friendly coating layer) from the bottom.

The (paper) filter 30 may be a known paper filter.

In another aspect, the present invention relates to a method for manufacturing paper capsules.

The paper capsule manufacturing method of the present invention includes the steps of forming a housing, fusing the first paper filter and the base to the bottom of the housing, curling the top of the housing, filling the coffee, inserting and fusing the paper spray layer, and cover A fusion step may be included.

The housing (A) manufacturing method may refer to the above-described information.

The paper base (B) can be manufactured by a method for manufacturing a known paper cup base. For example, a paper base is inserted into the lower end of the housing with a jig, and the edge portion is folded downward during the insertion process. If the lower end is folded inward while the housing is rotated and heat-compressed, the base can be fused to the lower part of the housing.

The curling is a process of rotating the top of the housing and winding it outward. The curling may use a known method.

After the coffee is filled in the housing, the paper injection layer may be inserted and welded.

In the step of attaching the paper cover, the paper for the cover may be pressed to the curling area and bonded by ultrasonic waves or thermal fusion.

The paper coffee capsule of the present invention can be extracted by being installed in a commercially available capsule machine. Commercially available capsule machines are described in Registered Patent No. 10-2250340.

In the above, preferred embodiments of the present invention have been described in detail by way of example, but these descriptions merely describe and disclose exemplary embodiments of the present invention. Those skilled in the art will readily recognize that various changes, modifications and variations can be made from the foregoing description and accompanying drawings without departing from the scope and spirit of the present invention.

Claims (11)

A paper capsule for brewing coffee or beverage, said paper capsule comprising:
A housing (A) in which paper side paper is wound or folded and fused;
A paper base (B) inserted into the lower end of the housing and fusion bonded; and
A paper cover (D) fused to the top of the housing,
The housing, base and cover are coated with a thermally adhesive barrier layer on one or both sides,
Ground coffee is filled inside the housing,
The paper base (B) or paper cover (D) is pierceable with a water supply needle mounted on a coffee or beverage capsule extraction machine,
The paper side is overlapped with the same shape of the first paper layer 10 and the second paper layer 20 spaced apart at a predetermined interval, the two layers overlapping and fusion bonded (S) and the non-overlapping first paper layer An outer portion M of and an outer portion N of the second paper layer,
The outer portion M of the first paper layer is an exposed surface of one edge of the first paper layer 10, and the outer portion N of the second paper layer is an exposed surface of one edge of the second paper layer 20. ego,,
The paper capsule, characterized in that the outer portion M of the first paper layer and the outer portion N of the second paper layer are overlapped and fused to the housing. The method of claim 1, wherein the housing
One edge of the first paper layer 10a and the other edge 10b are attached without overlapping,
A paper capsule characterized in that one side edge 20a and the other edge 20b of the second paper layer are attached without overlapping and there is no step. The method of claim 1, wherein the housing
Including an inner housing formed of one paper layer of the first paper layer 10 and the second paper layer 20 and an outer housing formed of the other paper layer,
Paper capsules, characterized in that the inner housing and the outer housing do not have overlapping stepped portions, respectively. [4] The paper capsule according to claim 3, wherein the inner housing and the outer housing are fusion bonded to each other without being spaced apart from each other. The paper capsule according to claim 1, wherein the housing has the same shape as the first paper layer (10) and the second paper layer (20), and the same shape has the same shape. The first paper layer (10) according to claim 1, wherein the first paper layer (10) and the second paper layer (20) have the same shape, and the same shape has the same shape, and the first paper layer (10) forms the height of the housing. A paper capsule, characterized in that the side length (H) of ) and the side length (h) of the second paper layer (20) are the same. The first paper layer (10) according to claim 3, wherein the first paper layer (10) and the second paper layer (20) have the same shape, and the same shape has the same shape, and the first paper layer (10) forms the height of the housing. The side length H of ) and the side length h of the second paper layer 20 are the same,
The arc L of the first paper layer 10 or the second paper layer 20 forming the upper circumference (inner circumference of the circle) of the outer housing and the upper circumference (inner circumference of the circle) of the inner housing A paper capsule characterized in that the arc (ℓ) of the second paper layer (20) or the first paper layer (10) to be formed is the same or satisfies the following formula (1).
[Equation 1]
L = ℓ + t×X
L: circumference of outer housing
ℓ: circumference of the inner housing
t: thickness of the first paper layer or the second paper layer forming the inner housing
X : a rational number selected from 2.90 to 3.20 or π The paper capsule according to claim 1, wherein the barrier layer is a water-resistant and heat-adhesive PE layer, a biodegradable coating layer, a recyclable eco-friendly coating layer, or an oxygen barrier layer. The paper capsule according to claim 1, wherein barrier layers of the first paper layer and the second paper layer are the same or different types of barrier layers. The paper capsule according to claim 1, characterized in that the first paper layer (10), the second paper layer (20), and the Nth paper layer of the same shape are overlapped with a predetermined distance apart from each other on the paper side.
Here, N is 3-10. The paper capsule according to claim 1, wherein the beverage or coffee extraction pressure of the paper capsule is in the range of 5 to 20 bar.

Images