KR20220156255A - Recyclable and reusable container and thereof manufacturing method and manufacturing apparatus - Google Patents

Abstract

The present invention relates to a recyclable and reusable container, and a manufacturing method and a manufacturing apparatus thereof. The present invention includes a release film (40) vacuum-adsorbed face-to-face onto the inner surface (34) without using an adhesive, thereby thoroughly preventing contamination of an inner surface (34) by foodstuffs, and ensuring productivity (non-use of adhesive and rapid vacuum adsorption). More importantly, the release film (40) and the inner surface (34) maintain a vacuum-adherent state with each other to significantly reduce damage caused by the sharpness of fish bones, forks, and chopsticks. Furthermore, the release film can be quickly and easily removed from a container merely by force for vacuum release, namely, by force of pinching one side of the release film (40) to remove the release film. Therefore, the present invention can maximize safety and usability, and thoroughly ensure recyclability and reusability of the container (30).

Description

Recyclable and reusable disposable container, manufacturing method thereof, and manufacturing apparatus therefor

The present invention relates to a recyclable and reusable disposable container, a method for manufacturing the same, and an apparatus for manufacturing the same, and more particularly, by attaching a release film to the inner surface of a container having a top portion, a side portion, and a bottom portion in a vacuum state to release the contents, For example, it blocks the source of contamination of the container by food in advance and at the same time allows the release film to be quickly and easily removed from the inner surface only with the force of vacuum release, realizing not only recycling of the container but also reuse of the container. It relates to a recyclable and reusable disposable container, a manufacturing method thereof, and a manufacturing apparatus therefor.

Due to the increase in single-person households and changes in consumption patterns of consumers who prefer convenience foods, the delivery market and the instant food market have been growing rapidly in recent years. The use of is increasing, and the increase in the use of disposable containers is emerging as an environmental problem by causing an increase in plastic waste that is difficult to recycle. Accordingly, there is a demand for a method for facilitating recycling or enabling reuse of disposable containers.

In general, disposable containers are manufactured by thermoforming in nature.

Thermoforming is a process of raising synthetic resin, that is, thermoplastic plastic, to the molding temperature and then forming it into a container shape. Specifically, stiff vacuum forming, drape forming, and matched mold forming. , plug assist forming, and the like.

In addition, various materials such as polyethylene terephthalate (PET), polystyrene (PS), polypropylene (PP), and high density polyethylene (HDPE) are applied to synthetic resins used in thermoforming, that is, plastics.

At this time, PET (polyethylene terephthalate) is used for containers or lids for packaging salads, fruits, meal salads, cakes, etc. because it is transparent, but is not used for general foods due to its lack of heat resistance. PS (polystyrene) is used in lunch boxes and sushi containers, but it also lacks heat resistance, so it cannot be used for hot food or microwave oven containers.

Accordingly, PP (polypropylene) material containers are widely used for hot delivery food or instant food and frozen food that must be heated in a microwave oven.

On the other hand, these disposable containers are believed to be recyclable, but in reality, they are contaminated by the contents because they come into contact with food, making it difficult to recycle as new materials. It is only being recycled.

On the other hand, in the case of PET bottles used for bottled water or beverages, there is no oil component in the contents, and since PET itself is a plastic that is relatively difficult for food ingredients to penetrate, it can be recycled through an appropriate washing process, but it can be recycled as delivered food or instant food. Contains ingredients that are easily contaminated, such as oil, and there is a limit to preventing contamination by food in disposable containers, that is, plastic containers.

Specifically, contamination by food that makes recycling of disposable containers difficult can be divided into two categories.

First, the penetration of the contents, i.e. food ingredients, into the plastic container.

Penetration of food ingredients into a disposable container is a phenomenon caused by diffusion of food in a liquid state into a polymer matrix, and this diffusion occurs faster as the oil content increases and the temperature of the food increases. Oil is a component that is very well absorbed in disposable containers, especially in the case of plastics with zero polarity, such as PP, which has a strong lipophilicity, so absorption occurs quickly even at room temperature.

In particular, foamed plastics such as foamed PS (PSP) containers, which have been used for lunch boxes and cup ramen containers, have many fine pores and are very easy for food ingredients to penetrate.

In addition, foods with oil and pigment components, such as yukgaejang or gamjatang, are typical foods that penetrate and contaminate plastic containers in a short time, making recycling difficult. That is, even if the once-used disposable container is washed with a detergent, oil penetrated by food ingredients is not removed.

Second, it is a phenomenon in which highly viscous food adheres to a disposable container and does not dry and fall off.

When food with high viscosity, such as sauce, ketchup, or dressing, is attached to a disposable container and dried, it is not easily removed even if washed, and while it is attached, food ingredients penetrate into the container, making it impossible to recycle as a plastic material. .

On the other hand, since most foods contain oil components and some components that are viscous to some extent, once a disposable container is contaminated by food, it is not easy to remove the contaminated components no matter how much it is washed.

Therefore, the disposable containers have been recycled as solid fuel after use or disposed of in a method of recovering heat energy after incineration, and recycling and reuse as new materials have virtually no performance.

In this situation, as a realistic alternative, weight reduction by thinning design or foaming technology of containers to reduce the amount of plastic used in disposable containers is in progress. In light of the current situation, which is an increasing trend in the use of disposable containers, a more active alternative is required.

1 is a longitudinal cross-sectional view showing a food packaging container according to Prior Art Document 1 (Republic of Korea Patent Registration No. 2157673).

The food packaging container according to Prior Art Document 1 includes a sheet container 110 for accommodating food and a cover film 120 covering the sheet container 110, as shown in FIG. 1, and the sheet container 110 It includes a first sheet layer 111 and a sheet adhesive layer 113 disposed on the first sheet layer 111 and bonded to the cover film 120, the cover film 120 comprising the cover layer 121 and the cover layer. 121 is disposed below and has a structure including a cover adhesive layer 123 bonded to the sheet adhesive layer 113.

However, since the food packaging container according to Prior Art Document 1 adheres the sheet adhesive layer 113 together with the first sheet layer 111 through extrusion lamination, adhesion between the first sheet layer 111 and the sheet adhesive layer 113 Since the strength is inevitably high, it is difficult for users to separate the sheet adhesive layer 113 from the first sheet layer 111 after eating, and the thickness of the sheet adhesive layer 113 also becomes non-uniform, so that the contents, that is, the oil of the food However, oil or pigment penetrates not only the sheet adhesive layer 113 but also the sheet container 110, which makes recycling and reuse impossible.

Figure 2a is a longitudinal cross-sectional view showing a recyclable food container according to Prior Art Document 2 (Korean Patent Registration No. 2158171), Figure 2b is a substrate layer (20 ) It is a longitudinal cross-sectional view showing a state in which the peeling layer 10 is peeled from.

The recyclable food container according to Prior Art Document 2 is a multi-layer film including a release layer 10 and a substrate layer 20, as shown in FIGS. 2A and 2B, and the release layer 10 is a peeling substrate layer. (11) and a peelable adhesive layer (12).

By the way, in the recyclable food container according to Prior Art Document 2, the peelable base material layer 11 is maintained as a whole adhered to the base material layer 20 through the peelable adhesive layer 12, so that the peelable adhesive layer 12 Required as an essential component, not only productivity decreases, but also the chemical components of the peelable adhesive layer 12 permeate into the peelable base material layer 11 and penetrate into the contents, that is, food. It can be harmful to, and furthermore, even if the peeling base material layer 11 is peeled off, the peelable adhesive layer 12 remains on the base layer 20, so when recycling and reusing the base layer 20, the washing process must be thoroughly performed again Recycling also has its limits.

In addition, the recyclable food container according to Prior Art Document 2 uses biodegradable polymers such as Polylactic acid (PLA) and Polybutylene adipate terephthalate (PBAT), and conventional plastic materials using oxidative biodegradable catalysts, polyketones. It is proposed to make a container by bonding a multilayer film made of a base layer 20 and a peelable adhesive layer 12 using a synthetic resin adhesive to a plastic sheet and molding it to make a container, but this is only possible on a sheet and container molding It has a problem that the multilayer film is torn or the adhesive layer is peeled off.

Figure 3 is a longitudinal cross-sectional view showing a packaging container that can be recycled according to Prior Art Document 3 (Korean Registered Patent Publication No. 1237783).

As shown in FIG. 3, the packaging container capable of recycling according to Prior Art Document 3 includes a lead film 4 covered on the container body 1, and the container body 1 has an adhesive portion 5A and an unadhered space portion It consists of a structure in which the tray layer 1' and the functional film 3 are combined with (5B) interposed therebetween.

By the way, the packaging container capable of recycling according to Prior Art Document 3 has an adhesive portion 5A and an unadhesive space portion 5B between the tray layer 1' and the functional film 3 when the container body 1 is manufactured. Therefore, it is not possible to avoid the lifting phenomenon of the functional film 3 by the non-adhesive space portion 5B, and when food is stored, an unclean phenomenon due to a sense of difference with the container body 1, that is, the tray layer 1' In addition, when the food is fish dishes, the functional film 3 lifted along with the non-adhesive space 5B is easily pierced and damaged by sharp fish bones, which causes contamination of the tray layer 1'. It is unavoidable, and furthermore, when the food is mixed and stirred with a fork or chopsticks, the functional film 3 lifted by the non-adhesive space 5B is frequently stabbed and damaged, resulting in contamination of the tray layer 1' On the other hand, the adhesive portion 5A is consumed as an essential component, resulting in a decrease in productivity, and the chemical components of the adhesive portion 5A permeate into the tray layer 1' and penetrate into the contents, that is, food. In case of unavoidable food intake, it may be harmful to the human body, and even if the functional film 3 is peeled off, the adhesive portion 5A remains on the tray layer 1', so that when recycling and reusing the tray layer 1' Again, the cleaning process must be thoroughly performed, so recycling and reuse are also not easy.

As a result, as can be seen from prior art documents 1, 2, and 3, when the film is formed in a thermally bonded state with the container, it is strongly adhered to the container by heat, making it difficult to remove the film from the container after use, and the container Even if the film is peeled off, residues such as adhesives remain, which is a recycling problem, and even if the film is forcibly peeled from the container, it is impossible to re-attach the film to the container from which the film was separated and reuse it.

Republic of Korea Patent Registration No. 2157673 Republic of Korea Patent Registration No. 2158171 Republic of Korea Patent Registration No. 1237783

An object of the present invention is to make a release film stick to the inner surface of a container having a top, side, and bottom in a vacuum state to prevent contamination of the container by contents, for example, food, and at the same time only release the vacuum It is to provide a recyclable and reusable disposable container, a method of manufacturing the same, and a manufacturing device capable of realizing reuse of the container as well as recycling of the container while allowing the release film to be quickly and easily removed from the inner surface with only the force of.

An object of the present invention is that the release film is vacuum adsorbed face-to-face on the inner surface without using a separate adhesive to thoroughly block contamination of the inner surface of food as well as to ensure productivity (adhesive-free and rapid vacuum attachment). More importantly, the release film and the inner surface maintain vacuum contact with each other to significantly reduce damage caused by fish thorns, forks and chopsticks, etc. Recyclable and reusable disposable containers capable of maximizing safety and usability by being able to be quickly and easily removed from the container with only the power of gripping and peeling either side of the film, and thoroughly guaranteeing recycling and reuse of the container, and the same It is to provide a manufacturing method and a manufacturing apparatus therefor.

An object of the present invention is to cause the release film to adhere to the inner surface of the container as low-temperature heat and at the same time to adhere with the weak adhesive force of the van der Waals force, so that a vacuum is formed between the inner surface and the release film By doing so, it is possible to thoroughly prevent unwanted peeling during transportation and use, and after use, only the release film contaminated by food can be separated quickly and easily, so that the container can be recycled or reused for the same purpose as a new material. It is to provide a recyclable and reusable disposable container, a method for manufacturing the same, and a manufacturing device for the same.

An object of the present invention is to ensure that the release film adheres to the inner surface while sending air through the air hole and at the same time sticks to the inner surface in a vacuum state to block contamination sources from the container and to be able to be peeled from the container only by the force of vacuum release. It is to provide a recyclable and reusable disposable container, its manufacturing method, and its manufacturing apparatus.

An object of the present invention is to provide an air hole in the bottom or side part of the container so that air can quickly escape through the air hole when the release film is brought into close contact with the inner surface, thereby reducing air resistance when the release film is vacuum attached. to reduce time as much as possible (to ensure productivity) and at the same time to thoroughly eliminate air bubbles that may form between vacuum interfaces to improve the precision of vacuum adsorption, and to selectively It is to provide a recyclable and reusable disposable container that can easily realize even a vacuum process by combination, a manufacturing method thereof, and a manufacturing apparatus therefor.

An object of the present invention is to seal the inside of the container by having the release film have a top sealing line that is fused along the top of the container, and then shape the release film using vacuum stretching, and also utilize vacuum and van der Waals force to make adsorption to the inner surface easier [starting from the top sealing line, the release film properly heated for stretching is stretched by vacuum or air pressure and accurately attached to the inner surface in a vacuum state, that is, the release film is In the state of being fused to the top part by the sealing line, it is stretched by heating and air pressure difference and adhered to the inner surface in a vacuum state], and further release through the inner sealing line fused along the side part or bottom part around the air hole Provides a recyclable and reusable disposable container, a manufacturing method thereof, and a manufacturing device thereof, which ensure easy maintenance of the disposable container by preventing unwanted vacuum release through an air hole during transportation and storage after vacuum adsorption of the film is in

An object of the present invention is to make the inner sealing line have a narrow part in accordance with the direction in which the release film is peeled off, enabling easier peeling when the release film is to be removed from the inner surface, and a recyclable and reusable disposable container and a manufacturing method thereof And it is to provide the manufacturing apparatus.

An object of the present invention is to form an inner sealing line on the side gently curved surface provided on the side part or on the bottom rising curved surface provided on the bottom part, so that when the release film is to be peeled off, from the top part of either side of the container to the side part and the bottom part Recyclable and reusable that enables quick and easy peeling by keeping the angle with the direction of peeling of the release film in the range of 110 to 170 degrees in the process of tearing off from the top part to the side part and bottom part on the other side. It is to provide a disposable container, its manufacturing method, and its manufacturing apparatus.

An object of the present invention is to preemptively separate only the lead film while maintaining the state attached to the container without the release film being peeled off in advance by the top sealing line provided on the outer edge of the top portion when the lead film is peeled off to consume food contained in the container. It is to provide a recyclable and reusable disposable container, a method for manufacturing the same, and a manufacturing device for ensuring convenience in use by enabling the same.

An object of the present invention is to make the release film consist of a multi-layer or multi-layered upper high melting point film and a lower lower melting point film, so that the top sealing line and the inner sealing line are fused to form a top sealing line and an internal sealing line relatively higher than the upper high melting point film. Recyclable and reusable disposable that ensures productivity by preventing the sticking between the inner sealing bar and the upper high-melting point film in advance, while ensuring rapid fusion to the container by the lower low-melting point film that melts at a lower temperature It is to provide a container, its manufacturing method, and its manufacturing apparatus.

An object of the present invention is to receive a container with a lower mold and firmly support the top, side, and bottom parts, together with heating of the release film, pressurization through a pressure pump, vacuum through a vacuum pump, and compression plug When pressing through the release film, all air between the release film and the container escapes through the air hole and the vent hole, and vacuum adsorption to the inner surface can be achieved quickly and precisely with the elongation and van der Waals force by heating the release film. It is to provide a recyclable and reusable disposable container that ensures productivity, a manufacturing method thereof, and a manufacturing apparatus therefor.

An object of the present invention is to seal the air hole in a closed shape by including an inner sealing bar that provides an inner sealing line by fusing a release film along the side portion or bottom portion around the air hole, thereby providing an undesirable vacuum state during storage and transportation of disposable containers. It is to provide a recyclable and reusable disposable container that can prevent release of the same, a method for manufacturing the same, and a manufacturing device for the same.

An object of the present invention is to apply a top sealing line by fusing along the top in a state in which a release film is covered on a container, and then operate to rapidly cool, so that when pressurized through a pneumatic pump, when vacuumed through a vacuum pump, or when compressed through a compression plug It is to provide a recyclable and reusable disposable container, a manufacturing method thereof, and a manufacturing apparatus thereof, which can completely prevent a release film from falling unexpectedly from a top portion.

The present invention for achieving the above object,

A recyclable and reusable disposable container comprising a container having a top portion, a side portion and a bottom portion and having an inner surface,

It is a basic feature of its technical configuration that it includes a release film that is adhered to the inner surface in a vacuum state to block contamination sources into the container while being peelable from the container by the force of vacuum release.

Recyclable and reusable disposable container manufacturing method according to the present invention for achieving the above object,

A step of providing a container having a top portion, a side portion, and a bottom portion, having an inner surface, and having an air hole formed in the side portion or bottom portion;

A step of applying a top sealing line by fusing along the top portion in a state where a release film is covered on the container;

It is a basic feature of the technical method that the release film includes a step of bringing the release film into close contact with the inner surface while heating it to send air through the air hole and at the same time sticking to the inner surface in a vacuum state.

Recyclable and reusable disposable container manufacturing apparatus according to the present invention for achieving the above object,

A lower mold having a top part, a side part and a bottom part, having an inner surface and having a vent hole corresponding to the air hole while accepting a container having an air hole formed in the side part or the bottom part at the same time;

A top sealing bar that is fused along the top portion in a state where a release film is covered on the container to give a top sealing line;

A heating means for heating the release film;

A pressure air pump injects air from the upper part of the container to make the release film stick to the inner surface in a vacuum state, sucks air from the lower part of the container to make the release film stick to the inner surface in a vacuum state It is composed of any one or more combinations of a vacuum pump that pressurizes the release film to adhere to the inner surface in a vacuum state, and has the following characteristics in terms of its technical configuration.

According to the present invention, a release film adheres to the inner surface of a container having a top, side, and bottom in a vacuum state to prevent contamination of the container by contents, for example, food, and at the same time, only the power of vacuum release It has the effect of enabling the recycling of the container as well as the reuse of the container while allowing the release film to be quickly and easily removed from the inner surface alone.

In the present invention, the release film is vacuum adsorbed face-to-face on the inner surface without using a separate adhesive to thoroughly block contamination of the inner surface of food, as well as to ensure productivity (no adhesive and rapid vacuum attachment). More importantly, the release film and the inner surface maintain vacuum contact with each other to significantly reduce damage caused by fish thorns, forks and chopsticks, etc. It can be quickly and easily removed from the container with only the force of peeling off by gripping either side, thereby maximizing safety and usability, and at the same time, there is an effect of thoroughly ensuring recycling and reuse of the container.

The present invention causes the release film to adhere to the inner surface of the container as low-temperature heat and stick with the weak adhesive force of van der Waals force to form a vacuum between the inner surface and the release film, resulting in unwanted peeling phenomenon during transportation and use This can thoroughly prevent this from happening, and after use, only the release film contaminated by food can be separated quickly and easily, so that the container can be recycled or reused for the same purpose as a new material.

The present invention has the effect of allowing the release film to stick to the inner surface while sending air through the air hole and at the same time sticking to the inner surface in a vacuum state to block contamination sources from the container and to be able to be peeled from the container only by the force of releasing the vacuum. there is

The present invention provides an air hole in the bottom or side part of the container so that air can quickly escape through the air hole when the release film is brought into close contact with the inner surface, thereby eliminating air resistance when the release film is vacuum attached. It enables to shorten time as much as possible (guaranteed productivity) and at the same time thoroughly eliminates air bubbles that may form between vacuum interfaces to improve the precision of vacuum adsorption. There is an effect that can easily realize the vacuum process by

The present invention seals the inside of the container by having the release film have a top sealing line fused along the top of the container, and then molds the release film using vacuum stretching, and also utilizes vacuum and van der Waals force to seal the inside of the container. Adsorption to the surface is made easier [starting from the top sealing line, the release film properly heated for stretching is stretched by vacuum or air pressure and accurately attached to the inner surface in a vacuum state, that is, the release film is applied to the top sealing line so that it can stick to the inner surface in a vacuum state while being stretched by heating and air pressure difference in the state of being fused to the top part], and furthermore, through the inner sealing line fused along the side part or bottom part around the air hole, the release film There is an effect of ensuring the ease of maintenance of the disposable container by preventing unwanted vacuum release through the air hole during transportation and storage after vacuum adsorption.

The present invention has the effect of allowing the inner sealing line to have a narrow portion in accordance with the direction in which the release film is peeled off, enabling easier peeling when the release film is to be separated from the inner surface.

In the present invention, the inner sealing line is formed on the side gently curved surface provided in the side part or the bottom upward curved surface provided in the bottom part, so that when the release film is to be peeled off, from the top part of one side of the container to the side part and the bottom part, and then to the other In the process of peeling from one top part to the side part and bottom part, the angle with the direction in which the release film is peeled is maintained in the range of 110 to 170 degrees, thereby enabling rapid and easy peeling.

According to the present invention, when the lead film is peeled off to consume food contained in the container, the release film is not peeled in advance by the top sealing line provided on the outer edge of the top portion, and only the lead film can be preemptively separated while maintaining the state attached to the container. This has the effect of ensuring convenience in use.

In the present invention, the release film is composed of a multi-layered or multi-layer upper high melting point film and a lower low melting point film, so that the top sealing line and the inner sealing line are fused at a relatively lower temperature than the upper high melting point film when the inner sealing bar is fused. It has the effect of guaranteeing productivity by preventing the sticking phenomenon between the inner sealing bar and the upper high melting point film in advance while allowing the fusion to the container to be performed quickly by the lower low melting point film melted in the lower part.

In the present invention, the container is received by the lower mold and the top, side, and bottom parts are firmly supported, and the release film is heated and pressurized through a pneumatic pump, vacuumed through a vacuum pump, and compressed through a compression plug. When all the air between the release film and the container escapes through the air hole and the vent hole, the elongation rate and van der Waals force by heating the release film enable vacuum adsorption to the inner surface quickly and accurately. It has the effect of ensuring productivity.

The present invention includes an inner sealing bar for providing an inner sealing line by fusing a release film along the side portion or bottom portion around the air hole to seal the air hole in a closed shape to release unwanted vacuum conditions during storage and transportation of disposable containers has the effect of preventing it in advance.

In the present invention, the release film is fused along the top portion in a state in which the release film is covered on the container to give a top sealing line and then operated to rapidly cool the release film when pressurized through a pressure pump, when vacuumed through a vacuum pump, or when compressed through a compression plug. There is an effect of thoroughly preventing the phenomenon of unexpectedly falling from the top part.

1 is a longitudinal sectional view showing a food packaging container according to Prior Art Document 1;
Figure 2a is a longitudinal cross-sectional view showing a recyclable food container according to Prior Art Document 2.
Figure 2b is a longitudinal cross-sectional view showing a state in which the peeling layer is peeled from the substrate layer in the recyclable food container according to Prior Art Document 2.
Figure 3 is a longitudinal cross-sectional view showing a packaging container capable of recycling according to Prior Art Document 3;
Figure 4a is a longitudinal cross-sectional view showing a disposable container according to the present invention.
Figure 4b is a longitudinal cross-sectional view including a lead film showing a disposable container according to the present invention.
Figure 5a is a plan view showing a rectangular disposable container according to the present invention.
Figure 5b is a plan view including a lead film showing a rectangular disposable container according to the present invention.
Figure 6a is a plan view showing a circular disposable container according to the present invention.
Figure 6b is a plan view including a lead film showing a circular disposable container according to the present invention.
Figure 7a is a longitudinal cross-sectional view showing a disposable container according to the present invention.
Figure 7b is a main portion cross-sectional view showing a top portion applied to a disposable container according to the present invention.
Figure 7c is a main portion cross-sectional view showing the bottom portion applied to the disposable container according to the present invention.
8 to 10c are process charts for explaining a recyclable and reusable disposable container manufacturing method and a recyclable and reusable disposable container manufacturing apparatus according to the present invention.

A recyclable and reusable disposable container according to the present invention, a manufacturing method thereof, and a preferred embodiment of the manufacturing apparatus will be described with reference to the drawings, and a plurality of examples may exist, and the present invention through these embodiments better understand its purpose, features and benefits.

Figure 4a is a longitudinal cross-sectional view showing a disposable container according to the present invention, Figure 4b is a longitudinal cross-sectional view including a lead film 50 showing a disposable container according to the present invention.

A disposable container according to the present invention includes a container 30 having a top portion 31, a side portion 32 and a bottom portion 33 and having an inner surface 34 as shown in FIGS. 4A and 4B, , to accommodate the contents, for example, food such as food.

When food is directly accommodated in the container 30, for example, oil such as oil, pigment, or broth of food directly contacts and permeates the inner surface 34, making it difficult to recycle and reuse the container 30 or not realizing it at all. make it impossible

Therefore, the disposable container according to the present invention adheres to the inner surface 34 in a vacuum state to block the source of contamination to the container 30 while removing the release film 40 that can be peeled from the container 30 by the force of vacuum release. included as a core component.

Increased contamination of food and difficulty in peeling due to the sheet adhesive layer 113 attached to the first sheet layer 111 of Prior Art Document 1 mentioned as the prior art of the present invention, the substrate layer 20 of Prior Art Document 2, and Deterioration in productivity due to the peelable adhesive layer 12 provided between the peeling base material layers 11 and adsorption of chemical components to food and furthermore, difficulty in peeling the peeling base material layer 11, the adhesive portion 5A of Prior Art Document 3 and Unlike the untidy state caused by the functional film 3 maintaining the lift from the tray layer 1' by the non-adhesive space portion 5B, the risk of deterioration in marketability and damage, etc., the disposable container according to the present invention has a top portion ( 31), the release film 40 is attached to the inner surface 34 of the container 30 having the side portion 32 and the bottom portion 33 in a vacuum state, so that the contents, for example, the container by food ( 30) while blocking the source of contamination in advance and at the same time allowing the release film 40 to be quickly and easily removed from the inner surface 34 only by the force of vacuum release, the container 30 as well as the recycling of the container 30 It even realized the reuse of

In particular, the release film 40 is vacuum-adsorbed face-to-face on the inner surface 34 without using a separate adhesive to thoroughly block contamination of the inner surface 34 of food as well as productivity (without using adhesive and rapid vacuum attachment) can be guaranteed, and more importantly, the release film 40 and the inner surface 34 maintain vacuum contact with each other to significantly reduce damage caused by fish thorns or sharpness such as forks and chopsticks At the same time, it can be quickly and easily detached from the container 30 only by the power of releasing the vacuum during peeling, that is, by gripping and peeling either side of the release film 40, thereby maximizing safety and usability, and at the same time container ( 30) to ensure thorough recycling and reuse.

At this time, the release film 40 adheres to the inner surface 34 of the container 30 as low-temperature heat and adheres to the inner surface 34 with a weak adhesive force of van der Waals force. By forming a vacuum between the films 40, it is possible to thoroughly prevent unwanted peeling during transportation and use, and after use, only the release film 40 contaminated by food can be separated quickly and easily. By doing so, the container 30 can be recycled or reused for the same purpose as a new material.

Figure 5a is a plan view showing a rectangular disposable container according to the present invention, Figure 5b is a plan view including a lead film 50 showing a rectangular disposable container according to the present invention, Figure 6a is a circular disposable container according to the present invention It is a plan view showing, Figure 6b is a plan view including a lead film 50 showing a circular disposable container according to the present invention.

As shown in FIGS. 4A to 6B according to the present invention, the container 30 has an air hole 35 penetrating the bottom portion 33 or the side portion 32, and the release film 40 is provided on the inner surface. While adhering to (34), air is blown out via the air hole (35), and at the same time, it adheres to the inner surface (34) in a vacuum state to block the source of contamination into the container (30), while only using the force of releasing the vacuum from the container (30). make it possible to peel off.

By providing an air hole 35 in the bottom part 33 or side part 32 of the container 30, air passes through the air hole 35 when the release film 40 is brought into close contact with the inner surface 34. It is possible to escape quickly by eliminating air resistance when vacuum attaching the release film 40 to shorten the time as much as possible (guaranteed productivity) and at the same time thoroughly eliminate air bubbles that may form between vacuum interfaces for vacuum adsorption. It is possible to improve the precision of the vacuum pump 92, the pressure pump 91 and the compression plug 93 to be described later, it is more preferable to easily realize a vacuum process by an optional combination.

At this time, in the disposable container according to the present invention, an air hole 35 is provided at the center of the bottom portion 33 so that air intervened therebetween is passed through the bottom portion when vacuum attaching to the inner surface 34 of the release film 40. The centering of the release film 40 with respect to the inner surface 34 is evenly matched by allowing the air to escape evenly through the air hole 35 formed in the center of the air hole 33 to ensure precision during vacuum adsorption.

Figure 7a is a longitudinal cross-sectional view showing a disposable container according to the present invention, Figure 7b is a cross-sectional view of main parts showing a top portion 31 applied to the disposable container according to the present invention, Figure 7c is a bottom portion applied to the disposable container according to the present invention ( 33) is a cross-sectional view of the main part.

According to the present invention, the release film 40 has a top sealing line 41 fused along the top portion 31 of the container 30, as shown in FIGS. 4A to 7C. And, according to the present invention, the release film 40 has an inner sealing line 42 that is fused along the side portion 32 or the bottom portion 33 around the air hole 35 .

After the release film 40 has a top sealing line 41 fused along the top portion 31 of the container 30 to seal the inside of the container 40, the release film 40 is sealed by vacuum. and molded, and also utilizes vacuum and van der Waals force to make adsorption to the inner surface 34 easier [the release film 40 properly heated for sealing from the top sealing line 41 is vacuum Alternatively, it is stretched by air pressure and accurately adhered to the inner surface 34 in a vacuum state, that is, the release film 40 is fused to the top portion 31 by the top sealing line 41 by heating and air pressure difference. While being stretched, it can adhere to the inner surface 34 in a vacuum state], and further release through the inner sealing line 42 fused along the side part 32 or bottom part 33 around the air hole 35 During transport and storage after vacuum adsorption of the film 40, unwanted vacuum release through the air hole 35 is prevented in advance to ensure easy maintenance of the disposable container.

At this time, the inner sealing line 42 has a narrow portion 42a in accordance with the direction in which the release film 40 is peeled off, so that the release film 40 can be peeled off from the inner surface 34 more easily. It is possible [when trying to peel off the release film 40, the initial starting line of the inner sealing line 42 in the peeling direction is not wide and narrow (pointy), so it can be peeled off more easily].

On the other hand, the inner sealing line 42 is a side gently curved surface 32a provided on the side portion 32 as shown in FIG. 7A or a bottom upward curved surface provided on the bottom portion 33 as shown in FIG. 7C ( 33a).

When the release film 40 is to be peeled when the inner sealing line 42 is formed on the side gently curved surface 32a provided on the side portion 32 or the bottom upward curved surface 33a provided on the bottom portion 33 From the top part 31 on one side of the container 30 to the side part 32 and the bottom part 33, and further from the top part 31 on the other side to the side part 32 and the bottom part 33. In the process, the angle with the direction in which the release film 40 is peeled is maintained in the range of 110 to 170 degrees to enable rapid and easy peeling.

On the other hand, the disposable container according to the present invention has a lead sealing line 51 fused along the top portion 31 as shown in FIGS. 5B and 6B and covers the contents contained in the container 30 with a lead film. 50, and as shown in FIG. 7B, the top sealing line 41 is provided on the outside of the top portion 31, while the lead sealing line 51 is provided on the inside of the top portion 31 characterized by

When the lid film 50 is peeled off to consume food contained in the container 30, the release film 40 is previously peeled off by the top sealing line 41 provided on the outer edge of the top portion 31 as shown in FIG. 7B. Convenience in use is ensured by allowing only the lead film 50 to be preemptively separated while maintaining a state of being attached to the container 30.

And, as shown in FIG. 4B, the release film 40 is composed of a multi-layered or multi-layered upper high melting point film 40a and a lower low melting point film 40b having a melting point difference of 30 ° C. or more, Top sealing to be described later When the inner sealing bar 72 for forming the line 41 and the inner sealing line 42 is fused, the container ( 30) to be fused quickly, while ensuring productivity by preventing the sticking between the inner sealing bar 72 and the upper high melting point film 40a in advance.

8 to 10c are process charts for explaining a method for manufacturing a recyclable and reusable disposable container and an apparatus for manufacturing a recyclable and reusable disposable container according to the present invention.

As shown in FIG. 8, the method for manufacturing a recyclable and reusable disposable container according to the present invention includes a top portion 31, a side portion 32, and a bottom portion 33, and has an inner surface 34 and a side portion at the same time. Step (S10) of preparing a container 30 having an air hole 35 formed in (32) or the bottom portion 33, and as shown in FIG. 9, the release film 40 is placed on the container 30. Step S20 of applying a top sealing line 41 by fusing along the top portion 31 in a covered state (S20), and heating the release film 40 to the inner surface 34 as shown in FIGS. 10A to 10C It is composed of a step (S30) of adhering to the inner surface 34 in a vacuum state while sending air through the air hole 35 in close contact.

The release film 40 is fused to the top portion 31 of the container 30 to form a top sealing line 41, and the release film 40 is brought into close contact with the inner surface 34 while heating to form an air hole 35. At the same time as sending air through it, it adheres to the inner surface 34 in a vacuum state, that is, heats the release film 40 with low-temperature heat and adheres to the inner surface 34 with the adhesive force of van der Waals force. By forming a vacuum between the inner surface 34 and the release film 40, it is possible to thoroughly prevent unwanted peeling during transportation and use, and after use, the release film 40 contaminated by food It is to ensure that only the can be quickly and easily separated, so that the container 30 can be recycled or reused for the same purpose as a new material.

And, as shown in FIGS. 7A and 10C, after the step S30, the release film 40 is fused along the side part 32 or the bottom part 33 around the air hole 35 to form an inner sealing line 42 Further including a step (S40) of applying, vacuum adsorption of the release film 40 through the inner sealing line 42 fused along the side portion 32 or the bottom portion 33 around the air hole 35. After storage and transportation, an unwanted vacuum release phenomenon through the air hole 35 is prevented in advance to ensure the ease of maintenance of the disposable container.

At this time, the step S30 is to inject air from the top of the container 30 as shown in FIG. 10A to make the release film 40 stick to the inner surface 34 in a vacuum state, as shown in FIG. 10B. As shown in Fig. 10c, sucking air from the bottom of the container 30 to cause the release film 40 to adhere to the inner surface 34 in a vacuum state, the release film 40 to the inner surface ( 34) so that it can be made of one or more combinations of compressing and sticking to the inner surface 34 in a vacuum state, so that the elongation by heating of the release film 40 and the inner surface using van der Waals force (34) to facilitate vacuum adsorption.

In addition, as shown in FIG. 4B, the release film 40 may be composed of a multi-layer or multi-layer upper high melting point film 40a and a lower low melting point film 40b.

Recyclable and reusable disposable container manufacturing apparatus according to the present invention has a top portion 31, a side portion 32 and a bottom portion 33 as shown in Figures 4a to 10c and has an inner surface 34 and At the same time, the lower mold having a vent hole 61 corresponding to the air hole 35 while accepting the container 30 having the air hole 35 drilled in the side part 32 or the bottom part 33 ( 60), a top sealing bar 71 for providing a top sealing line 41 by fusing along the top part 31 in a state where the release film 40 is covered on the container 30, and the release film 40 is heated A heating means 80, a pressure pump 91 for injecting air from the upper part of the container 30 to cause the release film 40 to stick to the inner surface 34 in a vacuum state, and the lower part of the container 30 A vacuum pump 92 that sucks air from the vacuum pump 92 to make the release film 40 stick to the inner surface 34 in a vacuum state, and pressurizes the release film 40 to make it stick to the inner surface 34 in a vacuum state. It may be made of any one or a combination of more than one of the compression plugs (93).

The pressure air pump ( 91), when vacuuming through the vacuum pump 92, and when compressing through the compression plug 93, all air between the release film 40 and the container 30 passes through the air hole 35 and the vent hole ( 61), the elongation by heating of the release film 40 and the van der Waals force enable vacuum adsorption to the inner surface 34 to be performed quickly and accurately, thereby ensuring productivity.

At this time, the release film 40 is fused along the side portion 32 or the bottom portion 33 around the air hole 35 to provide an internal sealing line 42, including an internal sealing bar 72 for providing an air hole. (35) is sealed in a closed shape to prevent unwanted release of the vacuum state during storage and transportation of the disposable container.

On the other hand, the top sealing bar 71 is fused along the top portion 31 in a state where the release film 40 is covered on the container 30 to provide a top sealing line 41 and then operated to rapidly cool the pressure air pump 91 ), when vacuuming through the vacuum pump 92, or when compressing through the compression plug 93, the release film 40 can be thoroughly prevented from falling unexpectedly from the top portion 31.

In addition, the heating means 80 may be hot air through the pressure pump 91, heating heat of the compression plug 93, and furthermore, low-temperature heating to the release film 40 by applying an infrared heater 81 [Attach the inner sealing bar 72 to the compression plug 93 to heat the release film 40 together with the heating heat of the compression plug 93 and internal sealing around the air hole 35 line 42 can be performed and given concurrently, which is desirable].

Such a recyclable and reusable disposable container according to the present invention, its manufacturing method, and its manufacturing apparatus recycle disposable containers such as plastic containers 30, synthetic resin containers 30, or coated foam containers 30 as new materials. In addition, by enabling reuse, the amount of plastic used in disposable food containers can be drastically reduced, and in particular, the release film 40 is attached to the three-dimensional container 30 in a vacuum state so that the container 30 ), while the release film 40 can be easily removed from the container 30 after use, while ensuring the ease of vacuum attachment through the air hole 35, the top sealing bar 71 and the inner sealing As the bar 72, only the top sealing line 41 and the inner sealing line 42 are narrowly fused to allow easy removal, so that no residue remains when the release film 40 is released from the container 30. Furthermore, the release film 40 has an elongation of 600 to 800% at 80 ° C. or less, so that it can be easily stretched by low-temperature heating and vacuum attached to the inner surface 34 of the container 30. It is preferable to have

Specifically, the release film 40 is required to have an appropriate tensile elongation, modulus of elasticity, and tensile strength in order to have flexible forming ability even at low temperatures, and as the release film 40 that can be used for this purpose, EVA (ethylene vinyl acetate) or LDPE and Polyolefin resins such as LLDPE, MDPE, HDPE, and PP can be used, and polyolefin-based resins copolymerized by a metallocene catalyst, such as Ionomer, EMA, and EMAA, can be used, and furthermore, it can be manufactured with a combination of two or more of these resins. is of course

In addition, the release film 40 is composed of a multi-layer or multi-layer upper high melting point film 40a and a lower low melting point film 40b, that is, the upper high melting point film 40a and the lower melting point having a difference of 30 ° C or more. It is preferable to be made of a low melting point film (40b). At this time, the release film 40 may be molded by co-extrusion of two or more layers, or dry lamination of the upper high melting point film 40a and the lower low melting point film 40b to improve interlayer adhesion. In addition, a silicone copolymer such as a block polymer composed of a copolymer of ethylene and silicone or a block polymer composed of a copolymer of propylene and silicone may be added to the upper high melting point film 40a to increase water repellency.

On the other hand, the container 30 used in the present invention can be any plastic material used in general food containers, but considering the adhesion and moldability with the release film 40, polyolefin resins such as HDPE and PP are preferred. , Of course, the container 30 can be formed by thermoforming or injection molding.

The present invention can be used in the industrial field related to disposable packaging containers.

30: container 31: top part
32: side portion 32a: side gently curved surface
33: bottom portion 33a: bottom upward curved surface
34: inner surface 35: air hole
40: release film 40a: upper high melting point film
40b: lower low melting point film 41: top sealing line
42: internal sealing line 42a: narrow part
50: lead film 51: lead sealing line
60: lower mold 61: vent hole
71: top sealing bar 72: inner sealing bar
80: heating means 81: infrared heater
91: pneumatic pump 92: vacuum pump
93: crimp plug

Claims (19)

A recyclable and reusable disposable container comprising a container (30) having a top portion (31), side portions (32) and bottom portions (33) and having an inner surface (34),
It is characterized in that it includes a release film 40 that is adhered to the inner surface 34 in a vacuum state and can be peeled off by the force of vacuum release from the container 30 while blocking the contamination source to the container 30. Recyclable and reusable disposable containers. According to claim 1,
The container 30 has an air hole 35 penetrating the bottom part 33 or the side part 32,
The release film 40 adheres to the inner surface 34 while sending air through the air hole 35 and at the same time adheres to the inner surface 34 in a vacuum state to prevent contamination from entering the container 30. Recyclable and reusable disposable container, characterized in that it is peelable by the force of the vacuum release from the container (30) while blocking. According to claim 2,
The air hole 35 is recyclable and reusable disposable container, characterized in that provided in the center of the bottom portion (33). According to claim 2,
The release film 40 is a reusable and reusable disposable container, characterized in that it has a top sealing line 41 fused along the top portion 31. According to claim 4,
The release film 40 has an inner sealing line 42 fused along the side part 32 or the bottom part 33 around the air hole 35. Recyclable and reusable disposable container. According to claim 6,
The inner sealing line 42 has a narrow portion 42a in line with the direction in which the release film 40 is peeled off. According to claim 5,
The inner sealing line 42 is recyclable and reusable, characterized in that formed on the side gently curved surface 32a provided on the side portion 32 or the bottom upward curved surface 33a provided on the bottom portion 33. disposable containers. According to any one of claims 5 to 7,
Recyclable and reusable disposable container, characterized in that it further comprises a lead film (50) covering the contents accommodated in the container (30) while having a lead sealing line (51) fused along the top portion (31). According to claim 8,
The top sealing line 41 is provided outside the top portion 31 while the lead sealing line 51 is provided inside the top portion 31 Reusable and reusable disposable container. According to any one of claims 5 to 7,
Recycling and reuse, characterized in that the release film 40 sticks to the inner surface 34 in a vacuum state while being stretched by heating in a state of being fused to the top portion 31 by the top sealing line 41 Disposable containers available. According to any one of claims 5 to 7,
The release film 40 is a recyclable and reusable disposable container, characterized in that consisting of an upper high melting point film (40a) and a lower low melting point film (40b). Having a top part 31, a side part 32 and a bottom part 33, having an inner surface 34 and having an air hole 35 drilled in the side part 32 or bottom part 33 at the same time A step (S10) of preparing the container 30;
A step (S20) of applying a top sealing line 41 by fusing along the top portion 31 in a state where the release film 40 is covered on the container 30;
Step S30 of bringing the release film 40 into close contact with the inner surface 34 while heating it so that the air is blown out via the air hole 35 and adhered to the inner surface 34 in a vacuum state (S30) Recyclable and reusable disposable container manufacturing method comprising a. According to claim 12,
After the step S30, a step (S40) of providing an internal sealing line 42 by fusing the release film 40 along the side portion 32 or the bottom portion 33 around the air hole 35 is further performed. Recyclable and reusable disposable container manufacturing method comprising a. According to claim 12 or 13,
The step S30 is to inject air from the upper part of the container 30 to make the release film 40 stick to the inner surface 34 in a vacuum state, and suck air from the lower part of the container 30. Indenting and causing the release film 40 to adhere to the inner surface 34 in a vacuum state, pressing the release film 40 to the inner surface 34 to vacuum the inner surface 34 A method of manufacturing a recyclable and reusable disposable container, characterized in that it consists of one or more combinations of sticking. According to claim 12 or 13,
The release film 40 is a recycling and reusable disposable container manufacturing method, characterized in that consisting of an upper high melting point film (40a) and a lower low melting point film (40b). Having a top part 31, a side part 32 and a bottom part 33, having an inner surface 34 and having an air hole 35 drilled in the side part 32 or bottom part 33 at the same time A lower mold 60 having a vent hole 61 corresponding to the air hole 35 while accepting the container 30;
A top sealing bar 71 for providing a top sealing line 41 by fusing along the top portion 31 in a state where the release film 40 is covered on the container 30;
A heating means 80 for heating the release film 40,
A pneumatic pump 91 injects air from the upper part of the container 30 to make the release film 40 stick to the inner surface 34 in a vacuum state, sucking air from the lower part of the container 30 A vacuum pump 92 for injecting and causing the release film 40 to adhere to the inner surface 34 in a vacuum state, pressurizing the release film 40 to adhere to the inner surface 34 in a vacuum state Recyclable and reusable disposable container manufacturing apparatus, characterized in that consisting of any one or more combinations of compression plugs (93). According to claim 16,
Including an internal sealing bar 72 for providing an internal sealing line 42 by fusing the release film 40 along the side portion 32 or bottom portion 33 around the air hole 35 Recyclable and reusable disposable container manufacturing apparatus characterized by. The method of claim 16 or 17,
The top sealing bar 71 is fused along the top portion 31 in a state where the release film 40 is covered on the container 30 to provide a top sealing line 41, and then rapidly cooled. Recyclable and reusable disposable container manufacturing apparatus. The method of claim 16 or 17,
The heating means 80 is recyclable and reusable, characterized in that any one of the hot air through the air pump 91, the heating heat of the compression plug 93, and the infrared heater 81 Disposable container manufacturing device.

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