KR100966159B1 - The manufacturing method of Insulated paper vessel - Google Patents

Abstract

The present invention relates to a heat-insulating paper container, and more particularly, to form a foam layer by coating and foaming thermoplastic low melting synthetic resin on the outer wall surface of the container body member of the paper container consisting of the container body member and the container bottom member, the foam layer The present invention relates to a method of manufacturing a heat-insulating paper container which can maintain a clear printing state as well as maintaining even heat insulation by forming a printing layer such as text, advertisement, POS bar code, etc. by curved printing.

The present invention is a low melting point thermoplastic synthetic resin coating step (501) of coating a low melting point thermoplastic synthetic resin to 25 ~ 60㎛ thickness on the entire surface of the base paper (outer wall surface of the container body member) of the paper container, and the low melting point thermoplastic synthetic resin coating After step 501, a high melting point thermoplastic synthetic resin coating step 503 for coating a high melting point thermoplastic synthetic resin on the other surface of the paper container (inner wall surface of the container body member), and after the high melting point thermoplastic synthetic resin coating step 503, Forming a container body member (L1) consisting of cutting the base paper to form a container body member (504, 505), and cut the portion corresponding to the base of the container bottom member from the base to form a vertical portion at the end Container bottom member manufacturing process (L2), the container body member manufacturing process (L1) and the container body member formed through the container bottom member manufacturing process (L2) forming apparatus A paper container forming process (L3) for preparing a paper container by input, and a foaming process (L4) for forming a foam layer by heating at 110 to 130 ° C. for 20 seconds to 4 minutes after the paper container forming process (L3); Characterized in that it consists of a printing layer forming process (L5) for forming a printing layer through the surface printing on the foam layer formed in the foaming process (L4).

Paper container, insulation, foaming, printing, curved printing

Description

The manufacturing method of Insulated paper vessel

The present invention relates to a method for manufacturing a heat-insulating paper container, and more particularly, to form a foam layer by coating and foaming thermoplastic low melting synthetic resin on the outer wall surface of the container body member of the paper container consisting of the container body member and the container bottom member, The present invention relates to a method of manufacturing a heat-insulating paper container which can maintain a uniform printing as well as maintaining a uniform printing state by forming a printing layer such as text, advertisement, POS barcode, etc. by curved printing on the foam layer.

Paper container 100 generally used is composed of a container body member 10 and the container bottom member 20 as shown in the cross-sectional view shown in FIG.

The container body member 10 is formed in the form of a tapered tube bonded by an adhesive by rolling a side of the sheet rounded at the top and wide at the bottom and narrow at both ends thereof, and curling the top of the container to increase the strength of the paper container. A portion 11 is formed, and the lower portion has a heel portion 30 that is bent inwardly.

The container bottom member 20 is provided with a base 21 having the same diameter as the bottom diameter of the container body member 10, the vertical portion 22 is bent downward in the vertical direction at the end of the base 21 ) Is formed.

The vertical portion 22 formed at the end portion of the bottom 21 of the container bottom member 20 is introduced into the bottom portion 30 formed at the bottom of the container body member 10 to be coupled to the bottom 21. ) And the heel 30 are joined by an adhesive applied during the actual molding process.

In the general paper container 100 as described above, the inner surface of the container body member 10 is a high temperature or low temperature content is introduced, the outer surface is a printed layer such as text, graphic advertising, POS barcodes, but is insulated If this is not made and the hot contents are introduced into the interior of the paper container 100, since the hot heat of the contents is immediately transferred to the paper container 100, when the user wants to drink the introduced contents, the hot container cannot be caught. If you want to move holding the (100) will have a lot of problems, such as burning the hand.

Therefore, in order to solve the above problems, after coating the low melting point thermoplastic synthetic resin on the outer wall surface of the container body member 10 constituting the paper container 100, foaming to form a foam layer 40 to obtain the effect of heat insulation It was suggested that the

That is, FIG. 2A is a flowchart of a manufacturing process of the paper container 100 in which the conventional foam layer 40 is formed, FIG. 2B is a process diagram and a cross-sectional view of FIG. 2A, and FIG. 2C is (B) and (H). As an enlarged view of the manufacturing process will be described.

First, as shown in the low melting point thermoplastic synthetic resin coating step 501 of Figure 2a and 2b (a) of the base paper 80 of the paper container 100 (outer wall surface of the container body member) polyethylene, polypropylene, After coating the low-melting thermoplastic synthetic resin 40a, which is foamed at a constant temperature, such as polyvinyl chloride, polystyrene, polyester, nylon, etc. to a thickness of 25 ~ 60㎛, and performing drying, the printing layer forming step 502 of Figure 2a And as shown in (b) of Figure 2b on the low melting point thermoplastic synthetic resin 40a to form a printed layer 50, such as letters, advertisements, POS barcodes, and drying is performed.

The low melting point thermoplastic synthetic resin 40a and the low melting point thermoplastic synthetic resin coating step 501 and the print layer forming step 502 are performed on the entire surface of the paper 80 of the paper container 100 (outer wall surface of the container body member). When the printing layer 50 is sequentially laminated, the other surface of the base paper 80 of the paper container 100 (inner wall surface of the container body member) as shown in the coating step 503 of the high melting point thermoplastic synthetic resin of Figure 2a and (c) of Figure 2b. ) After coating the high melting point thermoplastic synthetic resin (60) as a foam inhibitor is dried.

When the high melting point thermoplastic synthetic resin coating step 503 is completed, the container body member 10 from the base paper 80 of the paper container 100, as shown in the cutting step 504 of the container body member of Figure 2a and (d) of Figure 2b. Cutting the corresponding portion), and then rolled round as shown in the container body member forming step 505 of Figure 2a and (b) of Figure 2b by adhering both ends to each other to produce the container body member (10) The manufacturing process L1 is completed.

At this time, the low melting point thermoplastic synthetic resin 40a and the print layer 50 are sequentially formed on the outer wall of the container body member 10 manufactured through the container body member manufacturing process (L1), and the foam inhibitor is formed on the inner wall surface. The high melting point thermoplastic synthetic resin 60 is formed to be coated.

On the other hand, after cutting the portion corresponding to the base 21 of the container bottom member 20 from the base paper 80, as shown in the cutting step 506 of the container bottom member 506 of Figure 2a and (b), As shown in (a) of the container bottom member forming step 507 of FIG. 2a and (b) of FIG. 2b, a vertical part 22 is formed at the end of the base 21 to complete the container bottom member manufacturing process L2. .

Here, the container body member manufacturing process (L1) and the container bottom member manufacturing process (L2) are each made by a separate device.

The container body member 10 and the container bottom member 20 manufactured through the container body member manufacturing process (L1) and the container bottom member manufacturing process (L2) are the paper container forming process (L3) of FIG. 2A and FIG. As in (g), it is put into a molding apparatus to combine the container body member 10 and the container bottom member 20 to complete the manufacture of the paper container 100.

At this time, when the paper container forming process (L3) is completed, the heel portion 30 is formed at the lower end of the container body member 10 as shown in the enlarged view of Fig. 2b and 4c. , The heel portion 30 is formed in a form surrounding the vertical portion 22 of the base 21 constituting the container bottom member 20, the heel portion 30 and the vertical portion 22 is formed by an adhesive On the other hand, the container body member 10 is the upper end is formed with a curling portion 11 for increasing the strength of the paper container.

After the paper container forming process (L3), the low melting point thermoplastic synthetic resin (40a) and the print layer (50) are sequentially stacked on the outer wall surface of the container body member (10), and the high melting point thermoplastic synthetic resin of the foam inhibitor is formed on the inner wall surface ( 60) is coated.

When the paper container forming process (L3) is completed in the foaming process (L4) of FIG. The foam layer 40 is formed on the outer wall surface of the container body member 10 as shown in the enlarged view of FIGS. 2B (a) and 2c (b) as the foam is applied. Insulation will be made by).

At this time, the water contained in the container body member 10 by the high melting point thermoplastic synthetic resin 60, which is a foam inhibitor applied to the inner wall surface of the container body member 10 passes through the high melting point thermoplastic synthetic resin 60, the foam inhibitor. By not doing so, the foam layer is formed only on the outer wall surface of the container body member 10.

In the conventional paper container 100 manufactured as described above, when the foam layer 40 is formed on the outer wall surface of the container body member 10, heat insulation of the paper container 100 can be expected, but the foam layer 40 There is a problem that the sharpness of the printed layer 50, such as printed on the character, advertisement, POS barcodes are expanded and expanded together, and the sharpness is significantly lowered. In particular, after printing the POS barcode directly on the low-melting thermoplastic synthetic resin 40a, foaming is performed. In this case, the bar code of the print layer 50 is deformed or distorted due to the foaming of the resin, so that the bar code cannot be read by the reader, which makes the point of sale information management impossible.

In order to solve the above problems, various methods have been proposed to maintain clear printing on the foam layer 40 formed on the outer wall surface of the container body member 10.

As an example, Korean Patent No. 565700 (Registration Date: 2006.3.22) applies copper ink on the surface of a low melting thermoplastic synthetic resin that forms a foam layer on the outer wall surface of the container body member so that the copper ink increases when foaming. Although a method of maintaining the clarity has been proposed, the tuning ink has a problem that the manufacturing cost of the paper container is increased due to the high price.

In addition, Korean Patent No. 371631 (Registration Date: 2003.01.27), Japanese Patent Application Laid-Open No. 9-95368 (Registration Date: April 4, 1997), Japanese Patent Application Laid-open No. 5-42929 (Publication date: 1993.23) In Korean Patent Application No. 7-232774 (published date: 1995.9.5), a surface of a low-melting thermoplastic synthetic resin forming a foam layer on the outer wall surface of a container body member is printed, and then a major portion of the printing is formed with a foam inhibiting portion (containing a synthetic resin component). To apply a coating, a high melting point thermoplastic synthetic resin, a volatilization prevention layer) has been proposed to prevent the foam layer is formed where the foam inhibitor is applied.

The prior art has a problem such as damage to the appearance and at the same time it is difficult to grasp as the portion to which the foam inhibitor is applied to create a recessed (uneven) portion on the surface of the container body member to be smooth, This foam inhibiting part has a problem that the heat insulation effect is low, and when hot contents are introduced, it is hot and cannot be caught or the heat insulation as a whole container is uneven.

In particular, all the above-mentioned prior arts are techniques for improving the clarity of printing that is formed on the foam layer as a result, and all of the fundamental problems proposed by these techniques are caused by forming the foam layer on the outer wall surface of the container body member, No matter how technically improved, the sharpness is lowered as compared with the case where the printing layer is directly formed on the outer wall surface of the container body member, and the foam layer is formed on the outer wall surface of the container body member. It will not affect.

The present invention is to solve the above problems, in the paper container consisting of the container body member and the container bottom member to form a foam layer evenly first by coating and foaming the thermoplastic low melting point synthetic resin on the outer wall surface of the container body member, It is a technical problem to maintain a clear printing state by eliminating the deformation or distortion of the printing layer, in particular the barcode, by forming a printing layer such as text, advertisement, POS barcode, etc. by curved printing on the foam layer.

The present invention for achieving the above object is a low melting point thermoplastic synthetic resin coating step of drying after coating the low melting point thermoplastic synthetic resin to 25 ~ 60㎛ thickness on the entire surface of the base paper (outer wall surface of the container body member) of the paper container, the low After the melting point thermoplastic synthetic resin coating step, the high melting point thermoplastic synthetic resin coating step of coating a high melting point thermoplastic synthetic resin on the other surface of the paper container (inner wall surface of the container body member), and after the high melting point thermoplastic synthetic resin coating step, cut the base paper container A container body member manufacturing process comprising forming a body member, a container bottom member manufacturing process of cutting a portion corresponding to the base of the container bottom member from the base and forming a vertical portion at the end, and a process of manufacturing the container body member And the container body member and the container bottom member manufactured through the manufacturing process of the container bottom member to the molding apparatus. Paper container molding process for manufacturing a paper container, and after the paper container molding process, the foaming process to form a foam layer by heating at 110 ~ 130 ℃ for 20 seconds to 4 minutes, and the surface printing on the foam layer formed in the foaming process Characterized in that the printing layer forming process of forming a printed layer through.

The present invention is a paper container consisting of the container body member and the container bottom member by coating and foaming the thermoplastic low melting point synthetic resin on the outer wall surface of the container body member to form a foam layer evenly to obtain the effect of uniform insulation as well as By forming a printed layer of letters, advertisements, POS barcodes, etc. by curved printing on the foam layer, the point of sale information can be managed by maintaining the clear printing state by eliminating the deformation or distortion of the printed layer, especially the barcode. There is.

Hereinafter, the heat-insulating paper container according to the present invention and a manufacturing method thereof will be described in detail with reference to FIGS. 3A to 3C.

Figure 3a is a manufacturing process flow chart of the heat-insulating paper container according to the present invention, Figure 3b (a) ~ (a) is a process cross-sectional view according to the manufacturing process flow chart of Figure 3, Figure 3c (bar) ~ ( A) is an enlarged cross-sectional view of Figure 7, Figure 4 is a state diagram of the surface printing in the manufacturing process of the heat-insulating paper container according to the present invention.

First, as shown in the low melting point thermoplastic synthetic resin coating step 501 of FIG. 3a and (a) of FIG. 3b, polyethylene, polypropylene, and the like on the entire surface of the base paper 80 of the paper container 100 (outer wall surface of the container body member). After coating the low-melting thermoplastic synthetic resin 40a, which is foamed at a constant temperature, such as polyvinyl chloride, polystyrene, polyester, nylon, etc. in a thickness of 25 to 60㎛, and drying, the high-melting thermoplastic synthetic resin coating step of FIG. 503) and the high melting point thermoplastic synthetic resin 60, which is a foam inhibitor, is coated on the entire surface of the base paper 80 (inner wall surface of the container body member) of the paper container 100, as shown in FIG.

When the high melting point thermoplastic synthetic resin coating step 503 is completed, the container body member 10 from the base paper 80 of the paper container 100 as shown in the cutting step 504 of the container body member of Figure 3a and (c) of Figure 3b. After cutting the portion corresponding to the), the container body member forming step 505 of Figure 3a and the rounded roll as shown in (d) of Figure 3b by adhering both ends to each other to produce the container body member (10) The manufacturing process L1 is completed.

At this time, the outer wall surface of the container body member 10 manufactured through the container body member manufacturing process (L1) is coated with a low melting point thermoplastic synthetic resin (40a), the inner wall surface of the high melting point thermoplastic synthetic resin (60) of the foam inhibitor function ) To be coated.

On the other hand, after cutting the portion corresponding to the base 21 of the container bottom member 20 from the base paper 80, as shown in the cutting step 506 of the container bottom member 506 of Figure 3a and (e) of Figure 3b, As shown in (a) of the container bottom member forming step 507 of FIG. 3a and (e) of FIG. 3b, a vertical part 22 is formed at the end of the base 21 to complete the container bottom member manufacturing process L2. .

Here, the container body member manufacturing process (L1) and the container bottom member manufacturing process (L2) are each made by a separate device.

The container body member 10 and the container bottom member 20 manufactured through the container body member manufacturing process L1 and the container bottom member manufacturing process L2 are the paper container forming process L3 of FIG. 3A and FIG. 3B. Put into the molding apparatus as shown in (bar) to combine the container body member 10 and the container bottom member 20 to complete the manufacture of the paper container 100.

At this time, when the paper container forming process (L3) is completed, as shown in the enlarged view of Figure 3c (a), the heel portion 30 is formed at the lower end of the container body member 10, the heel portion 30 Is formed in a form surrounding the vertical portion 22 of the base 21 constituting the container bottom member 20, the heel portion 30 and the vertical portion 22 is coupled by an adhesive, while the container body member 10, the upper end is formed with a curling portion 11 for increasing the strength of the paper container.

After the paper container forming process (L3), the outer wall surface of the container body member 10 is still coated with a low melting thermoplastic synthetic resin 40a, and the inner wall surface is coated with a high melting point thermoplastic synthetic resin 60 of a foam inhibitor.

When the paper container forming process (L3) is completed, when heated for 20 seconds to 4 minutes at 110 ~ 130 ℃ as in the foaming process (L4) of Figure 3a and (b) of Figure 3b to the container body member (10) As the contained moisture evaporates and foams the low melting thermoplastic synthetic resin 40a, as shown in the enlarged view of FIG. 3C (b), a foam layer 40 is formed on the outer wall of the container body member 10. Insulation is to be made by the foam layer (40).

At this time, the water contained in the container body member 10 by the high melting point thermoplastic synthetic resin 60, which is a foam inhibitor applied to the inner wall surface of the container body member 10 passes through the high melting point thermoplastic synthetic resin 60, the foam inhibitor. By not doing so, the foam layer is formed only on the outer wall surface of the container body member 10.

That is, the foam layer 40 is formed on the outer wall surface of the container body member 10 while the low melting point thermoplastic synthetic resin 40a is foamed, and the moisture contained in the paper forming the container body member 10 is reduced. While evaporating to the inside and outside of the container body member 10, at this time the inside of the container body member 10 is blocked by the high melting point thermoplastic synthetic resin (60) that is a foam inhibitor, so that the moisture can not escape to the inside and stretched by heating As the water flows out toward the low melting point thermoplastic synthetic resin 40a softened so that the soft low melting point thermoplastic synthetic resin 40a swells, the foam layer 40 is formed only on the outer wall surface.

In the foaming process (L4), when the foaming temperature is lowered, the foaming time becomes relatively longer. On the contrary, when the foaming temperature is higher, the foaming time becomes relatively shorter. Since foaming does not occur and foaming occurs at a very high speed at 130 ° C. or more, and a uniform foaming layer 40 cannot be obtained, it is preferable to foam for 20 seconds to 4 minutes within the range of 110 to 130 ° C.

When the foaming process (L4) is completed, the printed layer such as text, advertisement, POS barcode through the surface printing on the foam layer 40 as shown in the printing layer forming process (L5) of Figure 3a and (b) of Figure 3b. After the formation of the (50) is carried out to complete the manufacture of the paper container of the present invention, the foam layer 40 on the outer wall surface of the container body member 10 as shown in the enlarged view of Figure 3c (c). ) And the printed layer 50 are laminated in order.

In the printing layer forming process (L5), as shown in FIG. 4, since the paper container 100 itself has no strength, the foam layer 40 after filling the inside by introducing the support frame 70 into the paper container 100 is filled therein. Is printed in close contact with the surface printing machine (90).

As such, the present invention forms the print layer 50 through curved printing in a state in which the foam layer 40 is already formed on the outer wall surface of the container body member 10, so that the print layer 50 is not affected by foaming at all. It will be possible to maintain a clear printing state without deformation.

1 is a cross-sectional view of a conventional paper container generally used.

Figure 2a is a flow chart of the manufacturing process of a typical heat insulating paper container.

2B is a cross-sectional view of the process of FIG. 2A.

(A) and (b) of FIG. 2c are enlarged views (g) and (h) of FIG. 2b.

Figure 3a is a flow chart of the manufacturing process of the heat-insulating paper container according to the present invention.

Figure 3b (a) to (a) is a process cross-sectional view according to the manufacturing process flow chart of Figure 3a.

3C is an enlarged view of (a), (d) and (h) of FIG. 3b.

Figure 4 is an exemplary view showing a printing layer formed state through the surface printing on the heat insulating layer of the heat insulating paper container according to the present invention,

Description of the Related Art

10: container body member 11: curling unit

20: container bottom member 21: base

22: vertical part 30: heel part

40: foamed layer 40a: low melting point thermoplastic synthetic resin

50: printed layer 60: high melting point thermoplastic synthetic resin

70: support frame 80: base paper

90: curved surface printing machine 100: paper container

Claims (1)

Low melting point thermoplastic synthetic resin coating step (501) and the low melting point thermoplastic synthetic resin coating step (501) to coat the entire surface of the base of the paper container (outer wall surface of the container body member) to 25 ~ 60㎛ thickness, and the low melting point thermoplastic synthetic resin coating step (501) ), A high melting point thermoplastic synthetic resin coating step 503 for coating a high melting point thermoplastic synthetic resin on the other surface of the paper container (inner wall surface of the container body member) and the high melting point thermoplastic synthetic resin coating step 503, and then cutting the raw paper. And the container body member manufacturing process (L1) comprising the steps of forming the container body member (504, 505), Container bottom member manufacturing process (L2) for cutting the portion corresponding to the base of the container bottom member from the base paper to form a vertical portion at the end, Paper container molding process (L3) for manufacturing a paper container by injecting the container body member and the container bottom member manufactured through the container body member manufacturing process (L1) and the container bottom member manufacturing process (L2), and After the paper container forming process (L3), the foaming process (L4) to form a foam layer by heating at 110 ~ 130 ℃ 20 seconds ~ 4 minutes, Method for producing a heat-insulating paper container, characterized in that consisting of a printing layer forming process (L5) of forming a printing layer through the surface printing on the foam layer formed in the foaming process (L4).

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