KR102548678B1 - Disposable paper container and method for manufacturing the same - Google Patents

Abstract

In order to prevent stains caused by oil, a main body including a side member having a curled portion at the top and a bottom member constituting a bottom surface, and a cover paper installed to cover the outside of the porcelain side member, wherein the cover includes a base layer, Provided is a paper container comprising an oil-resistant coating layer coated on an outer surface of the substrate layer to prevent penetration of oil applied to form the curl portion.

Description

Oil-resistant cover paper, paper container including the same, and manufacturing method thereof {DISPOSABLE PAPER CONTAINER AND METHOD FOR MANUFACTURING THE SAME}

The present disclosure relates to paper containers, oil-resistant cover sheets used in paper containers, and manufacturing methods for manufacturing paper containers.

For example, instant food such as cup noodles can be easily cooked and eaten by pouring hot water into a container containing the food.

The container may be made of a paper material suitable for use as a disposable vessel for wrapping food and holding cooked food. As a result, the heat insulating property of the container is deteriorated. Therefore, the heat of the hot water is strongly transmitted to the user's hand, making it inconvenient to use.

In order to solve these disadvantages, a double container in which the outer surface of the container is wrapped with a separate cover paper has been developed and used. The double container has a structure in which a cover is attached to the outer surface of the container. The top of the double container is rolled outward through a curling process. Oil is applied as a molding aid for smooth curling to the upper part of the container where curling is performed. Oil reduces friction between the curling equipment and paper and increases slipperiness to prevent curling defects.

In general, mineral oil and silicone oil are used as oil. Silicone oil has excellent volatility compared to mineral oil, but has a disadvantage of inhibiting adhesion. Therefore, mineral oil is used for containers that require sealing of the curl part. Mineral oil has relatively low volatility, so it is frequently deposited on the cover attached to the outside of the container.

Therefore, in the case of the prior art, there is a problem of creating stains while oil is adsorbed on the cover.

An object of the present invention is to provide an oil-resistant cover sheet capable of preventing stains caused by oil, a paper container including the same, and a method for manufacturing the same.

The paper container of the present embodiment may include a main body including a side member having a curled portion at the top and a bottom member forming a bottom surface, and a cover sheet installed to cover the outside of the side member.

The cover of the present embodiment may include a base layer and an oil-resistant coating layer coated on an outer surface of the base layer to prevent penetration of oil applied to form the curl portion.

The oil-resistant coating layer is formed by applying a mixture of a 2-Methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate coating agent and water can do.

The mixture may include 40 to 45% by weight of the coating agent and 50 to 55% by weight of water.

The container manufacturing method of the present embodiment may be a paper container manufacturing method including a main body including a side member having a curled portion at the top and a bottom member forming a bottom surface, and a cover paper installed to cover the outside of the side member.

The container manufacturing method includes preparing the side member and the bottom member, manufacturing a main body by combining the side member and the bottom member, applying oil to the curling portion of the side member, curling the cover, and the cover. It may include preparing a paper and attaching the cover paper.

The preparing of the cover sheet may include forming an oil-resistant coating layer on an outer surface of the base material layer of the cover sheet to prevent penetration of the oil.

In the oil-resistant coating layer forming step, the oil-resistant coating layer is a 2-methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate coating agent It can be formed by applying a mixture containing water and water.

The mixture may include 40 to 45% by weight of the coating agent and 50 to 55% by weight of water.

In the step of forming the oil-resistant coating layer, the mixture may be applied at 2.95 g/m 2 to 3.55 g/m 2 .

In the step of forming the oil-resistant coating layer, a step of drying the mixture by applying hot air of 80 to 85 degrees to the mixture may be further included.

As described above, according to the present embodiment, by effectively blocking the penetration of oil by the oil-resistant coating layer coated on the cover of the container, it is possible to prevent contamination or staining of the cover by oil.

Accordingly, container defects can be minimized and productivity can be increased.

1 is a schematic cross-sectional view showing a paper container according to this embodiment.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later. The embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

The terminology used below is only for referring to specific embodiments and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of "comprising" specifies specific characteristics, regions, integers, steps, operations, elements, and/or components, and other specific characteristics, regions, integers, steps, operations, elements, elements, and/or groups. does not exclude the presence or addition of

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the following examples are only preferred examples of the present invention, but the present invention is not limited to the following examples.

Hereinafter, a paper container (hereinafter referred to as a container) will be described as an example of a container for ramen. The paper container of this embodiment is not limited to a ramen container, and can be applied to any container using oil to form a curl portion on the top.

1 schematically shows the configuration of a container according to this embodiment.

As shown, the container 10 is a double structure including a body 20 including a side member 22 and a bottom member 24, and a cover 30 installed outside the side member 22. can

The main body 20 may be formed of a paper material. The body 20 may form a cylindrical shape. The main body 20 is formed with a diameter of the open top relatively larger than the diameter of the bottom member 24 forming the bottom surface. The side member 22 is inclined so that its diameter gradually decreases from top to bottom. The open upper end of the main body 20 has an upper end curled portion 26 formed by winding the upper end of the side member 22 outward.

Oil is applied to the top of the side member 22 as a molding aid for smooth curling. The oil reduces friction between the curling equipment and the paper and increases the slipperiness, so that the upper curl portion 26 can be molded without defects.

The shape or size of the main body 20 may be variously modified and is not limited to the illustrated structure.

The cover paper 30 is installed while wrapping around the side member 22 to form a heat insulating space between the side member 22 and the side member 22 . The cover paper 30 may be formed of the same paper material as the body 20 .

The cover sheet 30 may further include a printed layer formed on an outer surface. A printed layer may be formed on the surface of the cover sheet through various conventionally known printing methods such as offset printing.

The lower end of the cover sheet 30 may be rolled inward to form the incurl portion 36 .

Thus, the cover paper 30 is spaced apart from the side member 22 of the main body 20 by the thickness of the in-curl portion 36 to form an adiabatic space therebetween. The shape or size of the incurl portion 36 for forming the heat insulation space may be variously modified.

The cover paper 30 of this embodiment is coated on the base layer 32 and the outer surface of the base layer 32 to block penetration of oil applied to the top of the side member 22 to form the top curl portion 26. A coating layer 34 may be included. The outer surface of the substrate layer 32 means a surface facing outward.

By forming the oil-resistant coating layer 34 on the surface of the cover paper 30, adsorption of oil can be suppressed and stains formed on the cover paper 30 by oil can be prevented.

The base layer 32 of the cover paper 30 may be made of a paper material. For example, the substrate layer 32 may be a substrate made of various paper materials such as a bleached or unbleached paper substrate, roll paper, kraft paper, cardboard, processed paper, or milk base paper. In addition, the substrate layer 32 may be formed by overlapping a plurality of layers of these paper substrates.

The oil-resistant coating layer 34 of the present embodiment may be formed by applying a mixture of a coating agent having water- and oil-resistant properties and water.

The coating agent is 2-Methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate (CAS No. 25852-37-3 , Butyl acrylate-methyl methacrylaste polymers).

Accordingly, the oil-resistant coating layer 34 has strong water- and oil-resistant properties by the coating agent described above. Therefore, it is possible to apply directly on the base layer 32 of the cover paper made of paper, and after drying, it is possible to obtain an excellent oil penetration prevention effect due to oil resistance.

In this embodiment, the mixture may include 40 to 45% by weight of the coating agent and 50 to 55% by weight of water.

By applying a mixture of the above coating agent and water on the substrate layer 32 to form a coating layer, the oil resistance of the water-based coating layer coated on the surface of the cover paper 30 is increased, drying is facilitated, and oil adsorption is effectively prevented. can

In this way, by forming the oil-resistant coating layer 34 on the surface of the cover paper 30 to reinforce the oil resistance, the oil applied to the top of the side member 22 to form the upper curl portion 26 is absorbed by the cover paper 30 It is possible to fundamentally prevent stains from occurring.

Hereinafter, the manufacturing process of the container according to this embodiment will be described.

According to this embodiment, the container prepares side members and bottom members constituting the main body, prepares a main body by combining the side members and bottom members, prepares a cover sheet having an oil-resistant coating layer, and installs the cover sheet on the container body. can be manufactured.

The side member and the bottom member can be prepared by cutting the raw material paper sheet.

The body is manufactured by bonding both side ends of the prepared side member and bonding the bottom member to the lower end. Then, oil is applied to the upper curling portion of the side member, and the upper curl portion is formed by winding it outward.

When the upper curl portion is formed on the main body, a container may be manufactured by attaching the prepared cover paper to the outside of the side member.

The preparing of the cover sheet may include forming an oil-resistant coating layer on an outer surface of the base material layer of the cover sheet to prevent penetration of oil.

The oil-resistant coating layer may be formed, for example, by applying a mixture for forming an oil-resistant coating layer on the base layer of the prepared cover paper.

In this embodiment, the mixture for forming the oil-resistant coating layer may be prepared by mixing 40 to 45% by weight of the coating agent and 50 to 55% by weight of water.

The coating agent of this embodiment may be 2-methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate. (CAS No. 25852-37-3, Butyl acrylate-methyl methacrylaste polymers)

If the content of the coating agent is less than the above range, there is a problem in that oil penetration prevention effect is lowered and stains caused by oil are generated on the cover. When the content of the coating agent exceeds the above range, the slip property is relatively high, and accidents such as separation from a device for transporting the cover may occur.

In this embodiment, the oil-resistant coating layer may be formed by applying 2.95 g/m 2 to 3.55 g/m 2 of the mixture.

If the coating amount of the mixture is less than 2.95 g/m 2 , the gloss of the oil-resistant coating layer 34 may deteriorate and scratches may occur, and the oil may be adsorbed to the cover paper to form stains due to poor oil resistance.

When the coating amount of the mixture exceeds 3.55 g/m2, the effect of increasing oil resistance does not increase, and only the cost due to the increased amount of the mixture may increase. Additional phenomena may occur.

An oil-resistant coating layer may be formed on the cover paper by applying the above mixture on the base layer of the cover paper and applying heat through a drying process to dry the mixture.

The drying process of this embodiment may have a structure in which hot air of 80 to 85 degrees is applied to the mixture to dry the mixture.

If the temperature of the hot air is lower than 80 degrees, the mixture may not be completely dried, resulting in smearing, and if the temperature of the hot air exceeds 85 degrees, there is a possibility of fire due to high temperature and high heat. By forming the oil-resistant coating layer on the cover paper under the above temperature conditions, the oil resistance of the cover paper can be secured.

In this way, through the manufacturing process of this embodiment, it is possible to prepare a cover sheet having an oil-resistant coating layer formed on its surface. The cover paper on which the oil-resistant coating layer is formed is attached to the side of the main body in a later process.

Since an oil-resistant coating layer is formed on the surface of the cover, it is possible to block penetration of oil remaining without volatilization in the curled upper part of the main body from permeating into the cover. Accordingly, in the container finally manufactured according to the present embodiment, oil stains do not appear on the surface of the cover.

[Experimental Example 1]

Table 1 below shows test results for the oil-resistant coating layer of this embodiment.

The experiment was conducted by coating the prepared mixture of this example on a cover sheet to form an oil-resistant coating layer, and manufacturing a container with the cover sheet. Each of the Examples was carried out under the same conditions, slightly changing the components of the mixture.

The experiment was conducted by stacking a plurality of containers prepared under the same conditions and checking whether stains were generated on the cover surface after 10 days. Experiments were conducted 10 times, and each experiment was conducted on 300 containers. After the experiment was completed, each container was checked one by one, and the result was expressed as the number of containers with stains.

Experiment S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 Coating agent content of the mixture (% by weight) 38 39 40 41 42 43 44 45 46 47 result 8 6 O O O O O O O O

From the experimental results shown in Table 1, the content of 2-methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate as a coating agent When this amount is less than 40% by weight, the number of stains on the cover was high as the oil resistance was poor and the adsorption of oil was not properly prevented.

In addition, when the coating agent exceeds 45% by weight, staining due to adsorption of oil can be prevented, but problems such as slippage during printing or molding may occur due to increased slipperiness.

Through the above experiments, by mixing 40 to 45% by weight of the coating agent of this embodiment, it is possible to effectively block oil adsorption to the inside while performing the original role of the water-based coating layer of the cover sheet, thereby preventing oil stains from occurring can confirm.

[Experimental Example 2]

According to this embodiment, a container was prepared by preparing a cover sheet having an oil-resistant coating layer formed on the surface.

Table 2 below shows the results of comparative experiments on a container with a cover attached to which an oil-resistant coating layer was formed according to this embodiment and a container with a conventional cover attached.

Except for the cover sheet, the other parts of the container are identical. Mineral oil with relatively low volatility was used as the oil used to form the upper curl portion of the container body.

In Table 2, the experimental example shows a container manufactured according to the present embodiment and having an oil-resistant coating layer formed on the cover.

The comparative example shows a container to which a cover sheet having a water-based coating layer, which is generally used in the related art, is attached. In this experiment, the container of the comparative example formed a coating layer on the cover using a mixture of a 2-propenoic acid 2-ethylhexyl ester polymer with ethenylbenzene coating agent and water. did

The experiment was carried out by over-spreading oil on the top of the main body so that the oil adhered to the surface of the cover in all containers of Examples and Comparative Examples.

The experiment was conducted by stacking a plurality of containers prepared under the same conditions and checking whether stains were generated on the cover surface after 10 days. Experiments were conducted on 300 containers per case, and a total of 5 experiments were conducted.

The experimental results below show the staining results of the cover paper in a state where all the oil has evaporated after 10 days. In both Comparative Examples and Examples, stains were checked individually for a total of 1500 containers, and the results were expressed as the number of containers with stains.

Experiment S1 S2 S3 S4 S5 Sum Incidence rate comparative example 15 21 18 22 13 89 5.9% Example O O O O O O O.0%

As shown in Table 2, in the case of the examples, the penetration of oil into the cover paper did not occur at all, and thus, no containers with stains occurred in a state in which all oil was evaporated. Accordingly, it can be confirmed that the present embodiment completely blocks the penetration of oil by the oil-resistant coating layer of the cover paper.

On the other hand, in the case of the comparative example, as the oil on the cover paper penetrated into the inside, 13 to 22 stains appeared in all 5 experiments, and stains appeared in 89 (5.9%) containers in total.

Therefore, through the experimental results, it can be confirmed that in the case of the present embodiment, the oil adsorption is prevented by the oil-resistant coating layer formed on the cover, so that oil stains on the surface of the cover can be effectively prevented compared to the prior art.

Although exemplary embodiments of the present invention have been shown and described as described above, various modifications and other embodiments may be made by those skilled in the art. All of these modifications and other embodiments are to be considered and included in the appended claims without departing from the true spirit and scope of the present invention.

10: container 20: body
22: side member 24: bottom member
26: upper curl part 30: cover paper
32: base layer 34: oil-resistant coating layer
36: incurl part

Claims (7)

A paper container including a main body including a side member having a curled portion at the top and a bottom member constituting a bottom surface, and a cover paper installed while wrapping the outside of the side member,
The cover includes a base layer and an oil-resistant coating layer coated on an outer surface of the base layer to prevent penetration of oil applied to form the curl portion,
The oil-resistant coating layer is formed by applying a mixture of a 2-Methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate coating agent and water. paper container. delete In the cover paper of a paper container including a main body including a side member having a curled portion at the top and a bottom member forming a bottom surface, and a cover paper installed while surrounding the outside of the side member,
The cover includes a base layer and an oil-resistant coating layer coated on an outer surface of the base layer to prevent penetration of oil applied to form the curl portion,
The oil-resistant coating layer is a mixture containing a 2-methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate coating agent and water. A cover paper for a paper container formed by coating. delete A paper container manufacturing method comprising a main body including a side member having a curled portion at the top and a bottom member constituting a bottom surface, and a cover paper installed while wrapping the outside of the side member,
Preparing the side member and the bottom member;
Manufacturing a main body by combining the side member and the bottom member;
Applying oil to the curling portion of the side member;
The curl part forming step,
Preparing the cover sheet, and
Attaching the cover sheet
including,
The step of preparing the cover paper includes forming an oil-resistant coating layer to prevent the penetration of the oil on the outer surface of the base layer of the cover paper,
In the oil-resistant coating layer forming step, the oil-resistant coating layer is a 2-methyl-2-propenoic acid methyl ester polymer with butyl 2-propenoate coating agent and , A method for manufacturing a paper container formed by applying a mixture containing water. delete According to claim 5,
The mixture is a paper container manufacturing method comprising 40 to 45% by weight of the coating agent and 50 to 55% by weight of the water.

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