KR102682984B1 - Cup shaped container and laminate for cup shaped container - Google Patents

Abstract

Provided is a cup-shaped container that can be manufactured inexpensively using paper-based cup-shaped container manufacturing equipment, has excellent long-term preservation of the contents, and is capable of aseptic sterilization and retort sterilization.
The cup-shaped container 1 is formed into a cylindrical shape by overlapping and joining the edges of both ends of the fuselage blank 20A, and has an inward folded portion 22 at the lower opening edge and an outer folded portion 22 at the upper opening edge. The fuselage 2 has a flange portion 23 bent toward the bottom, and the bottom body 3 has a roughly inverted U-shaped cross section, which is formed by molding a floor blank 30A so that a hanging portion 32 is formed on its outer periphery. It is done by. The outer surface of the lower part 32 is joined to the inner surface of the lower end part 2a of the fuselage 2, and the folded part 22 is joined to the inner surface of the lower part 32, thereby forming the fuselage 2 and the bottom body 3. ) is integrated. Each of the fuselage blank 20A and the floor blank 30A has metal foil layers 201, 301 and heat-sealable resin layers 202, 302 laminated on both sides of the metal foil layers 201, 301, but the paper It is formed of a laminate (20, 30) without layers. The floor body 3 is formed by drawing and molding the floor blank 30A.

Description

Cup-shaped container and laminate for cup-shaped container {CUP SHAPED CONTAINER AND LAMINATE FOR CUP SHAPED CONTAINER}

The present invention relates to a cup-shaped container containing food or beverages such as ice cream or yogurt, and a laminate used as a material for the container.

For example, as a container for filling and packaging semi-solid dairy products such as ice cream and yogurt, paper cup-shaped containers, that is, paper cups, are generally used.

Paper cups are usually formed by bonding and integrating a body and a bottom body made of paper blanks each cut into a predetermined shape. More specifically, the fuselage is formed into a cylindrical shape by overlapping and joining both end edges of a roughly fan-shaped fuselage blank, forming an inward folded portion at the lower opening edge, and forming an inward folded portion at the upper opening edge. This is achieved by forming a flange portion curled outward. The floor body has a roughly inverted U-shaped cross section, formed by skirt forming a roughly circular floor blank so that a drooping portion is formed on its outer periphery. Then, the lower part of the bottom body is surrounded and joined to the folding part of the fuselage, so that the fuselage and the bottom body are integrated.

Each blank for the fuselage and the bottom is made of a laminate having, for example, a paper layer made of plain base paper, acid-resistant paper, coated paper, etc., and a polyethylene resin (PE) layer laminated on one or both sides of the paper layer ( For example, see Patent Document 1 below).

In addition, as a material for each blank, a paper cup using a laminate formed by laminating a barrier layer made of aluminum foil or the like in addition to a paper layer and a polyethylene resin (PE) layer is also known (for example, see Patent Document 2 below) ).

In addition, containers for ice cream, yogurt, etc., made of plastic molded bodies such as polypropylene resin (PP) are also known (for example, see Patent Document 3 below).

Patent Document 1: Japanese Patent Application Publication No. 58-30955 Patent Document 2: Japanese Patent Laid-Open No. 2007-210639 Patent Document 3: Japanese Patent Laid-Open No. 2007-176505

However, while paper cups are excellent in productivity and can be manufactured at low cost, they have low barrier properties and are not suitable for long-term storage of contents.

In the case of paper cups to which a barrier layer such as aluminum foil was added, the long-term preservation of the contents was improved, but water easily penetrated from the cross section of the paper layer, making retort sterilization impossible. Additionally, in the case of plastic containers, the cost of manufacturing equipment was high and they were not suitable for long-term storage of the contents.

The present invention was made in view of the above-mentioned problems, and can be manufactured at low cost using manufacturing equipment for cup-shaped containers mainly made of paper, and is excellent in long-term preservation of the contents, such as aseptic sterilization and retort sterilization. The purpose is to provide a cup-shaped container that can also be used.

In order to achieve the above-mentioned object, the present invention is made up of the following conditions.

1) The fuselage blank is formed into a cylindrical shape by overlapping and joining the two ends of the fuselage blank, and has a flange bent outward at the upper opening edge, and the floor blank is formed on the outer periphery of the fuselage. In the cup-shaped container, which is made of a bottom body whose cross-section is roughly inverted U-shaped, which is molded as much as possible, and where the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end part of the body,

The blank for the fuselage is formed of a laminate that has a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but does not have a paper layer, and the overlapped both ends of the blank for the fuselage constitute their overlapping surfaces, The heat-sealable resin layers are joined by heat-sealing each other, and the metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layer,

The blank for the floor body is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on the upper side of the floor body among both sides of the metal foil layer, but without a paper layer, and the inner surface of the lower part of the fuselage and the number of floor bodies. The outer surface of the lower part is joined by heat-sealing the heat-sealable resin layers constituting these surfaces, and the metal foil layer at the bottom of the fuselage and the metal foil layer at the lower part of the base are formed through the heat-sealable heat-sealable resin layer. These stacked cup-shaped containers.

2) The cup-shaped container of 1) above, wherein the bottom body is formed by drawing and molding a blank for the bottom body.

3) The cup-shaped container of 1) or 2) above, wherein the flange is folded downward and formed into a flat shape.

4) The cup-shaped container of 1) or 2) above, wherein the flange portion is curled downward and formed into a roughly circular cross-sectional shape.

5) Any of the above 1) to 4) in which the end edge of the fuselage blank, which is the inner side of the fuselage, is folded so as to overlap the surface of the fuselage blank, which is the outer side of the fuselage, and is heat-sealed to the same side. One cup-shaped container.

6) The thickness of the metal foil layer of the laminate forming the blank for the fuselage is 40 to 200 μm, and the thickness of the metal foil layer of the laminate forming the blank for the floor is 40 to 200 μm. Any cup-shaped container.

7) In the laminate forming the blank for the fuselage, the thickness of the heat-sealable resin layer laminated on both sides of the metal foil layer is 5 to 80㎛, and in the laminate forming the blank for the floor, the thickness of the metal foil layer is 5 to 80㎛. The cup-shaped container according to any one of items 1) to 6) above, wherein the heat-sealable resin layer laminated on the upper side of the bottom of the two sides has a thickness of 5 to 80 μm.

8) Any of the cup-shaped containers of 1) to 7) above, wherein, in the overlap portion of the fuselage, the total thickness of the heat-sealable resin layers heat-sealed to each other at both end edges of the fuselage blank is 8 to 150 μm.

9) In the overlap portion of the fuselage, the cup-shaped container of any one of the above 1) to 8), wherein the overlap width of the metal foil layers at both end edges of the fuselage blank is 2 to 10 mm when viewed in the thickness direction.

10) The fuselage further has a folded portion folded inward from the lower opening edge to surround the lower portion of the bottom body,

The laminate forming the blank for the floor body further has a heat-sealable resin layer laminated on the lower side of the floor body among both sides of the metal foil layer,

The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and the metal foil of the folded portion is placed on the inside of the heat-sealable heat-sealable resin layer. The cup-shaped container of any of the above 1) to 9) in which the layers are stacked.

11) The cup-shaped container of 10) above, wherein in the laminate forming the blank for the base, the heat-sealable resin layer laminated on the lower side of the base among both sides of the metal foil layer has a thickness of 5 to 80 ㎛.

12) The fuselage blank is formed into a cylindrical shape by overlapping and joining the two ends of the fuselage blank, and has a flange bent outward at the upper opening edge, and the floor blank is formed on the outer periphery of the fuselage. In the cup-shaped container, which is made of a bottom body whose cross-section is roughly inverted U-shaped, which is molded as much as possible, and where the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end part of the body,

The blank for the fuselage is a laminate that has a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but does not have a paper layer, and is cut to a dimension that is twice the predetermined length and cut into half from the center of the length. It is made by folding and overlapping, and heat-sealing the heat-sealable resin layers constituting the overlapping surfaces. The two edge edges of the fuselage blank are overlapped so that the edge portion on the folded side is inside the fuselage, and these overlapping surfaces overlap each other. The heat-sealable resin layers constituting the are joined by heat-sealing each other, and the metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layer,

The blank for the floor body is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on the upper side of the floor body among both sides of the metal foil layer, but without a paper layer, and the inner surface of the lower part of the fuselage and the number of floor bodies. The outer surface of the lower part is joined by heat-sealing the heat-sealable resin layers constituting these surfaces, and the metal foil layer at the lower end of the fuselage and the metal foil layer at the lower part of the floor are formed through the heat-sealable heat-sealable resin layer. These stacked cup-shaped containers.

13) The cup-shaped container of 12) above, wherein the bottom body is formed by drawing and molding a blank for the bottom body.

14) The cup-shaped container of 12) or 13) above, wherein the flange portion is folded downward and formed into a flat shape.

15) The cup-shaped container of 12) or 13) above, wherein the flange portion is curled downward and formed into a roughly circular cross-sectional shape.

16) The fuselage further has a folded portion folded inward from the lower opening edge to surround the lower part of the floor,

The laminate forming the blank for the floor body further has a heat-sealable resin layer laminated on the lower side of the floor body among both sides of the metal foil layer,

The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and the metal foil of the folded portion is placed on the inside of the heat-sealable heat-sealable resin layer. A cup-shaped container according to any one of items 12) to 15) above, in which the layers are stacked.

17) A fuselage that is formed into a cylindrical shape by overlapping and joining the edges of both ends of the fuselage blank in a joint shape and has a flange portion bent outward at the upper opening edge, and a floor blank with a lower part on the outer periphery of the fuselage blank. In the cup-shaped container, which is made of a bottom body of approximately inverted U shape in cross section, which is formed by molding to form a bottom body, and where the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end portion of the body,

The blank for the fuselage is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on the inner side of the fuselage among the two sides of the metal foil layer, but without a paper layer, and the two end edges of the fuselage blank are overlapped in a joined shape. These heat-sealable resin layers are joined by heat-sealing each other, and metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layer,

The blank for the floor body is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on the upper side of the floor body among both sides of the metal foil layer, but without a paper layer, and the inner surface of the lower part of the fuselage and the number of floor bodies. A cup in which the outer surface of the lower part is joined by heat-sealing these heat-sealable resin layers, and the metal foil layer of the lower part of the body and the metal foil layer of the lower part of the base are laminated through the heat-sealable heat-sealable resin layer. shape container.

18) The cup-shaped container of 17) above, wherein the bottom body is formed by drawing and molding a blank for the bottom body.

19) The laminate forming the blank for the fuselage further has a heat-sealable resin layer laminated on the outer side of the fuselage among both sides of the metal foil layer,

The cup-shaped container of 17) or 18) above, wherein the joint portion of the fuselage is bent to one side so as to overlap the outer surface of the fuselage and is heat-sealed to the outer surface of the fuselage.

20) The cup-shaped container of any of the above 17) to 19), wherein the flange portion is folded downward and formed into a flat shape.

21) The cup-shaped container of any of the above 17) to 19), wherein the flange portion is curled downward and formed into a roughly circular cross-sectional shape.

22) The fuselage further has a folded portion folded inward from the lower opening edge to surround the lower part of the floor,

The laminate forming the blank for the floor body further has a heat-sealable resin layer laminated on the lower side of the floor body among both sides of the metal foil layer,

The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and the metal foil of the folded portion is placed on the inside of the heat-sealable heat-sealable resin layer. The cup-shaped container of any of the above 17) to 21) in which the layers are stacked.

23) The fuselage blank is formed into a cylindrical shape by overlapping and joining the two end edges of the fuselage blank or overlapping them in a joint shape, and has a flange bent outward at the upper opening edge, and the floor blank. A cup-shaped container consisting of a bottom body with a cross-sectional outline of an inverted U shape formed by molding the outer periphery to form a lower part, and in which the outer surface of the lower part of the bottom part is joined to the inner surface of the lower part of the body, thereby integrating the body and the bottom part. As a laminate used as a material for each of the blank for the fuselage and the blank for the floor,

A laminate for a cup-shaped container, which has a metal foil layer and a heat-sealable resin layer laminated on at least one of both sides of the metal foil layer, but does not have a paper layer.

According to the cup-shaped container of 1) above, the blank for the fuselage is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides, and the blank for the bottom is formed on the upper side of the bottom among the metal foil layer and both sides of the metal foil layer. Since it is formed as a laminate having a heat-sealable resin layer laminated on the surface, it can be manufactured inexpensively using manufacturing equipment for cup-shaped containers mainly made of paper.

In addition, according to the cup-shaped container of 1) above, since the laminate used as the material for each blank has a metal foil layer, the long-term preservation of the contents is excellent.

Additionally, according to the cup-shaped container of 1) above, retort sterilization can be performed because the laminate used as the material for each blank does not have a paper layer.

In addition, according to the cup-shaped container of 1) above, excellent sealing and barrier properties can be obtained in the overlap portion of the fuselage and the joint portion between the lower end of the fuselage and the lowered portion of the bottom.

According to the cup-shaped container of 2) above, the following effects are achieved.

That is, in the case of a conventional paper cup, wrinkles are likely to occur when the blank for the base is formed into a roughly inverted U-shape in cross section, and due to these wrinkles, defective bonding occurs between the lower part of the base and the lower end of the body, Additionally, there is a risk of causing a decrease in barrier properties. Additionally, when performing aseptic (sterile) filling using a paper cup, the sterilizing solution was likely to remain at the boundary between the body and the bottom of the paper cup. This is believed to be due to the fact that when molding a floor blank mainly made of paper, the paper cracks at the corner between the bottom and the lower part, making it difficult to create an angle at the corner.

On the other hand, according to the cup-shaped container of 2) above, since the bottom body is made by drawing and molding a blank for the bottom body formed of a laminate having a metal foil layer and a heat-sealable resin layer but no paper layer, the bottom body has no wrinkles. Therefore, it is possible to reliably prevent defective bonding between the lower part of the floor and the lower part of the fuselage or a decrease in barrier properties. In addition, according to the cup-shaped container of 2) above, the angle of the corner between the bottom and the lower part of the bottom is likely to appear, and therefore, even when aseptic (sterile) filling is performed, the body and the bottom are separated from each other. No sterilizing solution remains at the border with the sieve.

According to the cup-shaped container of 3) or 4) above, the cross section of the blank for the fuselage is not exposed to the tip side of the flange portion of the fuselage, so that, for example, when the contents are beverages, the flange portion can be used as a part to be touched without interference. It can function.

According to the cup-shaped container of 5) above, corrosion can be suppressed because the cross section of the metal foil layer does not come into contact with the contents contained in the container in the overlap portion of the fuselage.

According to the cup-shaped container of 6) above, sufficient barrier properties and molding processability can be obtained.

According to the cup-shaped container of 7) above, sufficient adhesive strength can be obtained at the overlap portion of the fuselage or the joint portion between the lower end of the fuselage and the lowered portion of the bottom. In addition, according to the container, the level difference in the portion formed by the overlap portion of the upper surface of the flange portion of the fuselage can be smoothened, resulting in good sealing properties when sealed with a cover material.

According to the cup-shaped container of 8) above, excellent barrier properties can be provided while ensuring sealability in the overlap portion of the body, and the long-term preservation of the contents is further improved.

According to the cup-shaped container of 9) above, since the overlap width is 2 mm or more, excellent barrier properties can be provided while ensuring sealability in the overlap portion of the body, and the long-term preservation of the contents can be further improved. It gets higher. In addition, according to the same container, since the overlap width is set to 10 mm or less, the width of the overlap part becomes larger than necessary, which prevents an increase in cost, and also reduces the difference in stress applied to the inner and outer parts of the overlap part. As a result, the occurrence of appearance defects such as wrinkles in the inner portion of the overlap portion is suppressed.

According to the cup-shaped container of 10) above, the bonding properties between the lower end of the fuselage and the lowered portion of the bottom are improved, the sealing properties and barrier properties at the joint portion of the two are improved, and further, at the lower end of the container, a blank for the fuselage is formed. And since the cross section of the metal foil layer of the floor blank is not exposed downward, corrosion can be suppressed.

According to the cup-shaped container of 11) above, excellent barrier properties can be provided while ensuring sealability at the joint between the folded portion of the body and the lowered portion of the bottom, and the long-term preservation of the contents is further improved.

According to the cup-shaped container of 12) above, almost the same effect as the cup-shaped container of 1) is achieved.

In addition, according to the cup-shaped container, the barrier properties of the body are significantly improved.

In addition, according to the cup-shaped container, corrosion can be suppressed because the cross section of the metal foil layer does not come into contact with the contents contained in the container in the overlap portion of the body.

According to the cup-shaped container of 13) above, almost the same effect as the cup-shaped container of 2) is achieved.

According to the cup-shaped container of 14) or 15), almost the same effect as the cup-shaped container of 3) or 4) is achieved.

According to the cup-shaped container of 16) above, almost the same effect as the cup-shaped container of 10) is achieved.

According to the cup-shaped container of 17) above, almost the same effect as the cup-shaped container of 1) is achieved.

In addition, according to the cup-shaped container, corrosion can be suppressed because the cross section of the metal foil layer in the joint portion of the fuselage does not come into contact with the contents contained in the container.

According to the cup-shaped container of 18) above, almost the same effect as the cup-shaped container of 2) is achieved.

According to the cup-shaped container of 19) above, the joined portion of the fuselage is bent to one side and heat-sealed to the outer surface of the fuselage, thereby improving the sealing properties and barrier properties of the fuselage.

In addition, according to the container, the joint portion does not protrude outward, so the appearance is improved and it becomes easier to hold.

According to the cup-shaped container of 20) or 21), almost the same effect as the cup-shaped container of 3) or 4) is achieved.

According to the cup-shaped container of 22) above, almost the same effect as the cup-shaped container of 10) is achieved.

According to the cup-shaped container laminate of 23) above, since it has a metal foil layer and a heat-sealable resin layer laminated on at least one of both sides, a blank for the fuselage and a blank for the bottom made of the copper laminate are prepared. , it can be manufactured inexpensively using manufacturing equipment for cup-shaped containers mainly made of paper.

In addition, according to the cup-shaped container laminate of 23) above, since it has a metal foil layer, a cup-shaped container manufactured using this material can be made to have excellent long-term preservation of the contents.

In addition, according to the cup-shaped container laminate of 23) above, since it does not have a paper layer, the cup-shaped container manufactured using this as a material for each blank can be subjected to retort sterilization.

1 is a perspective view of a cup-shaped container according to a first embodiment of the present invention.
FIG. 2 is a vertical cross-sectional view taken along line II-II of FIG. 1. In the figure, the portion surrounded by the one-dash line (A) is an enlarged view of the portion surrounded by the one-dash line (a), and 1 point The portion surrounded by the dashed line (B) is an enlarged view of the portion surrounded by the one-dot dashed line (b).
Figure 3 (a) is an enlarged cross-sectional view showing the layer structure of a laminate used as a material for a fuselage blank, and (b) is an enlarged cross-sectional view showing the layer structure of a laminate used as a material for a floor blank.
Figure 4 is an enlarged horizontal cross-sectional view showing the overlap portion of the body of the cup-shaped container.
Figure 5(a) is a top view of the fuselage blank, and (b) is a perspective view of the fuselage formed from the fuselage blank.
Figure 6(a) is a top view of a blank for a floor body, and (b) is a perspective view of a floor formed from a blank for a floor body.
Fig. 7 is a vertical cross-sectional view showing one of the manufacturing processes of the cup-shaped container.
Fig. 8 is a partially enlarged vertical cross-sectional view showing a modified example of the flange portion of the fuselage in the cup-shaped container.
Fig. 9 is a partially enlarged vertical cross-sectional view showing a modified example of the connection structure between the body and the bottom of the cup-shaped container.
Fig. 10 is a partially enlarged vertical cross-sectional view showing another state of the overlap portion of the body of the cup-shaped container.
Fig. 11 is a horizontal cross-sectional view showing the manufacturing process of the overlap portion of the above embodiment.
Fig. 12 is a horizontal cross-sectional view of a cup-shaped container according to the second embodiment of the present invention. In the figure, the portion surrounded by the dashed-dash line (C) is an enlarged view of the portion surrounded by the dashed-dashed line (c). One drawing.
Fig. 13 is a perspective view showing a part of the manufacturing process of the body of the cup-shaped container.
Fig. 14 is a horizontal cross-sectional view of a cup-shaped container according to the third embodiment of the present invention. In the figure, the portion surrounded by the dashed-dotted line (D) is an enlarged view of the portion surrounded by the dashed-dashed line (d). One drawing.
Fig. 15 is a horizontal cross-sectional view showing a part of the manufacturing process of the body of the cup-shaped container.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 15.

[First Embodiment]

1 and 2 show the overall configuration of the cup-shaped container 1 of the first embodiment according to the present invention, and the container 1 includes a fuselage 2 formed from a fuselage blank 20A. ) and the floor body 3 molded from the floor blank 30A are joined and integrated.

The fuselage 2 is in the shape of a tapered cylinder, and as shown in Fig. 5, it is formed by overlapping and joining the two end edges of the fan-shaped blank 20A for the fuselage. Therefore, in the fuselage 2, there is an overlap portion 21 that extends along the height direction.

At the lower opening edge of the fuselage 2, an inward folding portion 22 is formed. Additionally, a flange portion 23 bent outward is provided at the upper opening edge of the fuselage 2. The flange portion 23 is folded downward and formed into an almost horizontal flat shape. As shown as a modified example in FIG. 8, the flange portion 23X may be curled downward and formed into a roughly circular arc shape in cross section.

The floor body 3 has a roughly inverted U-shaped cross-section having a circular horizontal bottom portion 31 and a hanging portion 32 extending downward from the outer periphery of the bottom portion 31, as shown in FIG. 6. As described above, the circular floor blank 30A is drawn and molded so that the lowering portion 32 is formed on its outer periphery.

Then, the outer surface of the lower part 32 of the bottom body 3 is joined to the inner surface of the lower end part 2a of the fuselage 2, and the folded part 22 of the fuselage 2 is attached to the lower part 32. By joining on the inner surface, the fuselage 2 and the bottom body 3 are integrated (see FIGS. 2 and 7).

In addition, as shown as a modified example in FIG. 9, the folded portion 22 is not formed at the lower opening edge of the fuselage 2, but the bottom body 3 is formed on the inner surface of the lower end 2a of the fuselage 2. The fuselage 2 and the bottom body 3 may be integrated by a connection structure in which the outer surface of the lower part 32 is simply joined. According to the configuration of this modified example, even if there are slight wrinkles in the lower part 32 during molding of the bottom body 3, the lower part 2a of the fuselage 2 and the lower part 2a are maintained without introducing air or the like. The lower part 32 of the floor body 3 can be installed reliably.

As shown in FIG. 3(a), the fuselage blank 20A has a metal foil layer 201 and a heat-sealable resin layer 202 laminated on both sides of the metal foil layer 201, but the paper layer is It consists of a laminate 20 that does not have any.

In addition, as shown in FIG. 3(b), the blank 30A for the floor also has a metal foil layer 301 and a heat-sealable resin layer 302 laminated on both sides of the metal foil layer 301, but the paper It consists of a laminate 30 without layers.

The thickness of each laminate 20, 30 is preferably less than 250 μm, and more preferably less than 200 μm. By setting the thickness of each laminate 20 and 30 within the above range, overlap among the flange portions 23 of the fuselage 2, like a paper cup using a laminate with a thickness of about 250 to 400 ㎛ as a blank material, The level difference in the part formed by the portion 21 becomes large, or the joint between the lower end portion 2a and the folded portion 22 of the fuselage 2 and the lowered portion 31 of the bottom body 3 becomes unstable. The problem is definitely avoided.

The metal foil layers 201 and 301 function as a barrier layer to protect the contents from gas, water vapor, light, etc.

As the metal foil constituting the metal foil layers 201 and 301, aluminum foil, iron foil, stainless steel foil, copper foil, etc. can be used, and aluminum foil is preferably used. In the case of aluminum foil, it may be either pure aluminum foil or aluminum alloy foil, and it may be either soft or hard, but for example, annealed A8000 series classified as JIS H4160 (especially A8079H or A8021H). If it is a soft material (O material), it can be used appropriately because it has excellent formability.

Base treatment such as chemical conversion treatment is performed on both surfaces of the metal foil layers 201 and 301, as necessary. Specifically, for example, on the surface of a metal foil that has been degreased,

1) An aqueous solution of a mixture containing at least one compound selected from the group consisting of phosphoric acid, chromic acid, metal salts of fluoride, and non-metal salts of fluoride.

2) A mixture containing at least one type of resin selected from the group consisting of phosphoric acid, acrylic resin, chitosan derivative resin, and phenol type resin, and at least one type of compound selected from the group consisting of chromic acid and chromium (III) salt. aqueous solution of

3) At least one resin selected from the group consisting of phosphoric acid, acrylic resin, chitosan derivative resin, and phenol resin, at least one compound selected from the group consisting of chromic acid and chromium (III) salt, and fluoride An aqueous solution of a mixture containing at least one compound selected from the group consisting of metal salts and non-metal salts of fluoride

After coating any of the aqueous solutions in 1) to 3) above, chemical conversion treatment is performed by drying to form a film.

The film formed on the surface of the metal foil layer (201) (301) by the chemical conversion treatment preferably has a chromium adhesion amount (per side) of 0.1 mg/m2 to 50 mg/m2, especially 2 mg/m2 to 20 mg. It is preferable to set it as /㎡. The thickness of the metal foil layers 201 and 301 is preferably 40 to 200 μm, and more preferably 80 to 160 μm. By setting the thickness of the metal foil layers 201 and 301 within the above range, sufficient barrier properties and molding processability can be obtained.

The heat-sealable resin layers 202 and 302 constitute the inner and outer surfaces of the container 1 and protect the metal foil layers 201 and 202, as well as deep-drawing the laminate 20 and 30. It plays a role in providing formability, and also serves to join the edges of both ends of the fuselage blank 20A, the lower end 2a and the folded portion 22 of the fuselage 2, and the bottom body 3. When bonded to the lower part 32, it functions as a heat fusion layer.

The heat-sealable resin layers 202 and 302 are, for example, made of a general-purpose film such as a heat-sealable polypropylene resin (PP) film or polyethylene resin (PE) film, or a composite film bonded together. It is composed of non-stretched polypropylene resin film (CPP), which has excellent heat resistance and drawability, and is particularly suitable. In addition, the heat-sealable resin layer 202 (302) is formed by a coating layer of maleic acid-modified polyethylene resin, maleic acid-modified polypropylene resin, ethylene-vinyl acetate resin, epoxy resin, or shellac resin, instead of the above film. It's okay if it's done.

The thickness of the heat-sealable resin layers 202 and 302 is preferably 5 to 80 μm, and more preferably 10 to 60 μm. By setting the thickness of the heat-sealable resin layers 202 and 302 within the above range, the joint between both end edges of the fuselage blank 20A, the lower end 2a of the fuselage 2, and the folded portion 22 are formed. Sufficient adhesive strength can be obtained at the joint between the lower part 32 of the bottom body 3 and the upper surface of the flange part 23 of the fuselage 2, which is formed by the overlap part 21. The step can be made gentle, and the sealing properties when sealed with a cover material become good.

Lamination of the metal foil constituting the metal foil layers 201 and 301 and the film constituting the heat-sealable resin layers 202 and 302 is, for example, performed by a dry laminate method through an adhesive layer (not shown). It is done by. As the adhesive layer, for example, a two-component curing type polyester-polyurethane resin adhesive or a polyether-polyurethane resin adhesive is used.

In addition, the laminate 20 constituting the fuselage blank 20A and the laminate 30 constituting the floor blank 30A are usually the same, but are made of different materials and/or thicknesses. It's also good.

Next, an example of a method of forming the cup-shaped container 1 using the above laminates 20 and 30 will be described.

First, the laminate 20 is punched out into a fan shape of a predetermined size to form a fuselage blank 20A (see Fig. 5(a)).

In addition, the laminate 30 is punched into a circular shape of a predetermined size to form a blank 30A for the floor (see FIG. 6(a)), and this blank 30A is formed into a die using a mold (not shown). By drawing and forming, the bottom body 3 having a roughly inverted U shape in cross section consisting of the bottom portion 31 and the lower portion 32 is formed (see Fig. 6(b)). The obtained bottom body 3 does not have wrinkles. Additionally, the corner portion between the bottom portion 31 and the lower portion 32 on the outer surface of the bottom body 3 has an angle.

Then, the bottom body 3 is set on the top surface of a roughly cone-shaped mold (not shown) so that the top surface of the bottom overlaps, and then the blank 20A for the fuselage is wrapped around the outer peripheral surface of the mold, and the blank 20A for the fuselage is formed at both end edges. After overlapping each other, the overlapping heat-sealable resin layers 202 and 202 of the overlap portion 21 are heat-sealed to each other to form a tapered cylindrical body 2. The means for heat fusion of the overlap portion 21 may be a high-frequency seal or an ultrasonic seal, in addition to a heat seal using a hot plate.

Next, the lower opening edge of the fuselage 2 is folded inward, and the folded portion 22 is pressed firmly against the lowering portion 32 of the bottom body 3 using a disk-shaped rotating mold (not shown). , by heat-sealing the overlapping heat-sealable resin layers 202 and 302 between the lower end portion 2a and the folded portion 22 of the fuselage 2 and the lowering portion 32 of the bottom body 3. , the fuselage (2) and the bottom body (3) are joined and integrated.

Finally, the upper opening edge of the fuselage 2 is curled outward using a predetermined curl forming mold (not shown) and pressed in the vertical direction to form a flat shape, thereby forming the flange portion 23. do.

In this way, the cup-shaped container 1 shown in FIGS. 1 and 2 is obtained.

In the overlap portion 21 of the body 2 of the cup-shaped container 1, the total thickness T1 of the heat-sealable resin layers 202 (202) heat-sealed to each other at both end edges of the body blank 20A. It is preferable that it is 8 to 150 μm, and more preferably it is 16 to 80 μm (see Figure 4). If the total thickness T1 is less than 8 μm, there is a risk that the sealing properties of the overlap portion 21 may be insufficient. On the other hand, if the total thickness T1 exceeds 150 μm, there is a risk that the barrier properties of the overlap portion 21 may be impaired.

In addition, in the overlap portion 21 of the fuselage 2, the overlap width W1 seen in the thickness direction between the metal foil layers 201 at both end edges of the fuselage blank 20A is 2 to 10 mm. It is preferable, and more preferably, it is 4 to 8 mm. If the overlap width W1 is less than 2 mm, there is a risk that the barrier properties of the overlap portion 21 may be impaired, and the seal width may become too small, resulting in insufficient sealing properties. On the other hand, if the overlap width W1 exceeds 10 mm, the width of the overlap portion 21 becomes larger than necessary, leading to an increase in cost, and also the inner portion of the overlap portion 21 (the blank 20A for the fuselage) Due to the difference in the stress applied to the outer part (one edge of the fuselage blank 20A) and the outer part (the other edge of the fuselage blank 20A), there is a risk of appearance defects, such as wrinkles, occurring in the inner part of the overlap portion 21. there is.

According to the cup-shaped container 1 of this embodiment, the following effects are achieved.

a) Laminate 20 in which each of the blank 20A for the fuselage and the blank 30A for the floor has metal foil layers 201 and 301 and heat-sealable resin layers 202 and 302 laminated on both sides thereof. ) (30), so it can be manufactured inexpensively using manufacturing equipment for cup-shaped containers mainly made of paper.

b) Since the laminates 20 and 30, which are the materials for each blank 20A and 30A, have metal foil layers 201 and 301, the long-term preservation of the contents is excellent.

c) Since the thickness of the blank 20A for the fuselage is reduced, the level difference in the portion formed by the overlap portion 21 among the upper surface of the flange portion 23 of the fuselage 2 can be reduced, and thus the container 1 ), it is difficult to cause seal defects when sealing the cover to the upper surface of the flange portion 23. Additionally, when performing aseptic (sterile) filling, it becomes difficult for the sterilizing liquid to remain in the above-mentioned steps on the upper surface of the flange portion 23.

d) Since the bottom body 3 is made by deep drawing and molding the blank 30A for the bottom body, wrinkles do not occur in the bottom body 3, and therefore, like a conventional paper cup, the lower part of the bottom body 3 ( There is no fear of defective bonding between 32) and the lower end portion 2a and the folded portion 22 of the fuselage 2 or of deterioration of barrier properties.

e) Since the thickness of the blank 20A for the fuselage and the blank 30A for the bottom body is reduced, the lower end 2a and the folded portion 22 of the fuselage 2 and the lowered portion 32 of the bottom body 3 can be joined stably.

f) Since the corner portion between the bottom portion 31 and the lower portion 32 on the outer surface of the bottom body 3 can be angled, when performing aseptic (sterile) filling, a cup-shaped container ( It becomes difficult for the sterilizing solution to remain at the boundary between the upper surface of the bottom body (3) of 1) and the inner peripheral surface of the body (2).

g) The laminates 20 and 30, which are the materials for each blank 20A and 30A, have metal foil layers 201 and 301 and heat-sealable resin layers 202 and 302, but do not have a paper layer. Because of this, retort sterilization can be performed.

FIG. 10 shows another state of the overlap portion 21 of the body 2 in the cup-shaped container 1.

In the cup-shaped container 1 shown in the same figure, the edge portion 204, which is inside the fuselage 2, of both end edges of the blank 20A for the fuselage, is the blank for the fuselage ( It is folded back so as to overlap the surface of 20A) and heat-sealed to the same surface, and the folded edge portion 204 and one edge portion 205 overlap, so that these edges 204 and 205 overlap each other. The overlapping heat-sealable resin layers 202 are heat-sealed to each other (see FIGS. 10 and 11).

The folding width of the folded end edge 204 and the overlap width of both end edges 204 and 205 may be substantially the same as shown in FIGS. 10 and 11, or may be different from each other.

It is preferable to perform the heat fusion of the folded edge 204 and the heat fusion of both end edges 204 and 205 simultaneously in one heat fusion process, thereby reducing man-hours and improving productivity. .

According to the above state, corrosion is suppressed because the cross section of the metal foil layer 201 in the overlap portion 21 of the fuselage 2 does not come into contact with the contents contained in the container 1.

[Second Embodiment]

12 and 13 show the cup-shaped container 1X of the second embodiment according to the present invention. The container 1X is substantially the same as the cup-shaped container 1 of the first embodiment shown in FIGS. 1 to 9 except for the following points.

That is, in the case of the cup-shaped container 1X of this embodiment, the blank 20B for the fuselage has a metal foil layer 201 and a heat-sealable resin layer 202 laminated on both surfaces of the metal foil layer 201. The layer-less laminate 20 is cut to a size twice the predetermined length, folded in half from the center of the length, overlapped, and the heat-sealable resin layers 202 constituting the overlapping surfaces are opened. It is achieved by fusion (see Figure 13).

Then, the both end edges 204B and 205B of the blank 20B for the fuselage are overlapped so that the end edge 204B on the folded side is inside the fuselage 2X, and these 204B and 205B are overlapped with each other. The heat-sealable resin layers 202 constituting the overlapping surfaces are joined by heat-sealing each other, and the metal foil layer 201 of both end edges 204B and 205B is formed through the heat-sealable heat-sealable resin layer 202. are stacked (see Figure 12).

According to the cup-shaped container 1X described above, two layers of metal foil layers 201 are laminated in parts other than the overlap portion 21 of the body 2X, and a total of four layers of metal foil layers ( Since 201) is laminated, the barrier properties of the body 2X are significantly improved, and the long-term preservation of the contents is further improved.

In addition, according to the above-mentioned cup-shaped container 1X, the cross section of the metal foil layer 201 does not come into contact with the contents contained in the container 1 It can be suppressed.

[Third Embodiment]

14 and 15 show a cup-shaped container 1Y according to a third embodiment of the present invention. The container 1Y is substantially the same as the cup-shaped container 1 of the first embodiment shown in FIGS. 1 to 9 except for the following points.

That is, in the cup-shaped container 1Y of this embodiment, the body 2 is formed into a cylindrical shape by overlapping and joining both end edges of the blank 20A for the body in a joined shape (FIG. 15(a)) reference). More specifically, both end edges of the fuselage blank 20A overlapped in a joined shape are joined by heat-sealing their heat-sealable resin layers 202, and the heat-sealable heat-sealable resin layer 202 is formed by heat-sealing the fuselage blank 20A. The metal foil layers 201 at both edge edges are laminated.

The joined portion 21Y of the fuselage 2 is bent to one side so as to overlap the outer surface of the fuselage 2 and heat-sealed to the outer surface of the fuselage 2 (see Fig. 15(b)).

According to the cup-shaped container 1Y, corrosion is suppressed because the cross section of the metal foil layer 201 does not come into contact with the contents contained in the container 1Y in the joint portion 21Y of the fuselage 2. can do.

In addition, according to the above-described cup-shaped container 1Y, the joined portion 21Y of the fuselage 2 is bent to one side and heat-sealed to the outer surface of the fuselage 2, so that the sealing and barrier properties of this portion are improved. It improves. Moreover, according to the cup-shaped container 1Y, the joint portion 21Y does not protrude outward, so the appearance is improved and it becomes easier to hold.

[Example]

Next, specific examples of the present invention will be described, but the present invention is not limited to these examples.

<Example 1>

Approximately 3 g/m2 of a two-component curing urethane adhesive was applied to both sides of a 100㎛ thick aluminum foil (A8021H-O) that had been chemically treated, and then a 30㎛ thick non-stretched polypropylene resin film (CPP) was dry laminated. did. Then, a predetermined aging treatment was performed to harden the adhesive, thereby obtaining a laminate.

Next, the obtained laminate was punched into a predetermined shape to form a blank for the fuselage and a blank for the floor (see FIGS. 5 and 6).

Then, using the blank for the fuselage and the blank for the bottom, the cup-shaped container shown in Figs. 1 and 2 was manufactured through the same process as the first embodiment described above, and this was referred to as Example 1. Since the obtained cup-shaped container uses aluminum foil with a thickness of 100 μm, it is a container with excellent barrier properties with almost no penetration of oxygen or water vapor.

Additionally, the dimensions of the cup-shaped container were as described below.

(Dimensions of cup-shaped container)

·Inner diameter of the opening at the top of the cup-shaped container: 65 mm

·Inner diameter of the bottom of the cup-shaped container: 50 mm

·Flange width: 4mm

·Height of cup-shaped container: 95mm

Height of the leg portion (folding portion 22) of the cup-shaped container: 6 mm

<Example 2>

Approximately 3 g/m2 of a two-component curing urethane adhesive was applied to both sides of a 100㎛ thick aluminum foil (A8021H-O) that had been chemically treated, and a 30㎛ thick linear low density polyethylene resin film (LLDPE) was dry laminated. did. Then, a predetermined aging treatment was performed to harden the adhesive, thereby obtaining a laminate.

Then, a cup-shaped container was produced in the same manner as Example 1 except for the above, and this was used as Example 2.

<Example 3>

Approximately 3 g/m2 of a two-component curing urethane-based adhesive was applied to one side of a 100㎛ thick aluminum foil (A8021H-O) that had been chemically treated on both sides, and a 30㎛ thick non-stretched polypropylene resin film (CPP) was formed. At the same time as dry laminating, about 3 g/m 2 of a two-component curing type urethane adhesive was applied to the other side, and a non-stretched polypropylene resin film (CPP) with a thickness of 50 μm was dry laminated. Then, a predetermined aging treatment was performed to harden the adhesive, thereby obtaining a laminate.

Next, the obtained laminate was punched into a predetermined shape to form a blank for the fuselage and a blank for the floor (see FIGS. 5 and 6).

Next, one edge of the fuselage blank is folded back to a width of 5 mm towards the CPP film with a thickness of 30 μm and attached to a mold, and then the other edge is overlapped on the outside of the folded edge to create an ultrasonic seal. By performing this, a cylindrical body was formed in which the outer surface was made of a CPP film with a thickness of 30 μm and the inner surface was made of a CPP film with a thickness of 50 μm (see FIGS. 10 and 11).

Then, a cup-shaped container was produced in the same manner as Example 1 except for the above, and this was used as Example 3.

<Comparative example 1>

Instead of aluminum foil (A8021H-O) with a thickness of 100㎛ with chemical treatment on both sides, cardboard with a thickness of 210㎛ was used, and after corona treatment on both sides of the cardboard, a linear low-density sheet with a thickness of 20㎛ was used. A laminate was obtained in the same manner as in Example 1, except that a polyethylene resin film (LLDPE) was laminated by the extrusion lamination method.

Then, a cup-shaped container was produced in the same manner as Example 1 except for the above, and this was used as Comparative Example 1.

(Retort sterilization test)

The cup-shaped containers of Examples 1 and 3 were filled with water as contents to about 3 mm below the flange portion.

In addition, as a cover material, from the outside, a biaxially stretched polyethylene terephthalate film (12 μm thick), an aluminum foil (20 μm thick), and a non-oriented polypropylene resin film (CPP, 30 μm thick) constituting the heat seal layer, Each laminate was prepared by punching it into a predetermined shape after joining it with a dry lamination method using a two-component curing type urethane adhesive.

Then, the cover material was heat-sealed to the flange portion of each cup-shaped container with a ring sealer, thereby obtaining a filled packaging container.

Regarding the cup-shaped containers of Example 2 and Comparative Example 1, the cup-shaped containers of Examples 1 and 3 were used except that a linear low-density polyethylene resin film (LLDPE, thickness 30 μm) was used as the heat seal layer of the cover material. In the same manner as above, a filled packaging container was obtained.

Each obtained filled packaging container was retort sterilized at 110°C for 30 minutes using a steam-type retort kiln, and taken out from the retort kiln after cooling.

As a result of performing the retort sterilization treatment in the above-mentioned method, the filled packaging containers of Examples 1 to 3 showed no seal leakage, no deformation of the container, or delamination of the laminate for cup-shaped containers, and exhibited appropriate retort sterilization.

On the other hand, in the filled packaging container of Comparative Example 1, there was seal leakage, moisture entered the cardboard layer of the cup-shaped container laminate, causing expansion, and interlayer delamination occurred in the laminate.

[Industrial applicability]

The present invention can be suitably used for, for example, cup-shaped containers containing fluid food, beverages, etc., and laminates used as materials for such containers.

1, 1X, 1Y: Cup-shaped container 2, 2X: Fuselage
2a: lower part of fuselage 21: overlap part
21Y: joint part 22: folded part
23, 23X: Flange part 20A, 20B: Blank for fuselage
20: Laminate 201: Metal foil layer
202: Heat-sealable resin layer 204: Folded edge portion
205: Edge part of one side 204B: Edge part of the folded side
205B: The best of both worlds
T1: Total thickness of heat-sealable resin layers heat-sealed to each other at both ends of the fuselage blank
W1: Overlap width seen in the thickness direction between the metal foil layers at both ends of the fuselage blank
3: bottom body 31: bottom part
32: Lower part 30A: Blank for floor body
30: Laminate 301: Metal foil layer
302: Heat-sealable resin layer

Claims (23)

The fuselage blank is formed into a cylindrical shape by overlapping and joining the two ends of the fuselage blank and has a flange bent outward at the upper opening edge, and the floor blank is molded so that a lower part is formed on the outer periphery of the fuselage blank. In the cup-shaped container, which consists of a bottom body with an inverted U-shaped cross section, and in which the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end of the body,
The blank for the fuselage is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but not a paper layer, and the overlapped both end edges of the blank for the fuselage overlap each other. The constituting heat-sealable resin layers are joined by heat-sealing each other, and metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layers,
The blank for the floor is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but not a paper layer, and the inner surface of the lower part of the fuselage and the outer surface of the lower part of the floor are these surfaces. The heat-sealable resin layers constituting the are joined by heat-sealing each other, and the metal foil layer at the lower part of the fuselage and the metal foil layer at the lower part of the base are laminated through the heat-sealable heat-sealable resin layer,
The fuselage further has a folding portion folded inward from the lower opening edge to surround the lower portion of the bottom body,
The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and are folded back on the inside of the heat-sealable heat-sealable resin layer. A cup-shaped container characterized by lamination of negative metal foil layers. According to paragraph 1,
A cup-shaped container, wherein the bottom body is formed by drawing and molding a blank for the bottom body. According to paragraph 1,
A cup-shaped container, wherein the flange portion is folded downward and formed into a flat shape. According to paragraph 1,
A cup-shaped container, characterized in that the flange portion is curled downward and formed into a cross-sectional arc shape. According to paragraph 1,
A cup-shaped container, characterized in that, among both end edges of the fuselage blank, an edge portion that is inside the fuselage is folded so as to overlap the surface of the fuselage blank that is outside the fuselage and heat-sealed to the same surface. According to paragraph 1,
A cup-shaped container, wherein the metal foil layer of the laminate forming the blank for the fuselage has a thickness of 40 to 200 μm, and the thickness of the metal foil layer of the laminate forming the blank for the bottom body is 40 to 200 μm. According to paragraph 1,
In the laminate forming the blank for the fuselage, the thickness of the heat-sealable resin layer laminated on both sides of the metal foil layer is 5 to 80 μm, respectively, and in the laminate forming the blank for the floor, both sides of the metal foil layer are A cup-shaped container characterized in that the heat-sealable resin layers laminated on each have a thickness of 5 to 80 ㎛. According to paragraph 1,
A cup-shaped container, characterized in that, in the overlap portion of the fuselage, the total thickness of heat-sealable resin layers heat-sealed to each other at both end edges of the fuselage blank is 8 to 150 μm. According to paragraph 1,
A cup-shaped container, characterized in that, in the overlap portion of the fuselage, the overlap width of the metal foil layers at both end edges of the blank for the fuselage in the thickness direction is 2 to 10 mm. The fuselage blank is formed into a cylindrical shape by overlapping and joining the two ends of the fuselage blank and has a flange bent outward at the upper opening edge, and the floor blank is molded so that a lower part is formed on the outer periphery of the fuselage blank. In the cup-shaped container, which consists of a bottom body with an inverted U-shaped cross section, and in which the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end of the body,
The blank for the fuselage is a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but not having a paper layer, cut to a dimension twice the predetermined length, and cut in half from the center of the length. This is made by folding and overlapping, and heat-sealing the heat-sealable resin layers constituting the overlapping surfaces, so that both edge edges of the fuselage blank overlap so that the edge portion on the folded side is inside the fuselage, and these are overlapped with each other. The heat-sealable resin layers constituting the overlapping surfaces are joined by heat-sealing each other, and the metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layers,
The blank for the floor is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but not a paper layer, and the inner surface of the lower part of the fuselage and the outer surface of the lower part of the floor are these surfaces. The heat-sealable resin layers constituting the are joined by heat-sealing each other, and the metal foil layer at the lower part of the fuselage and the metal foil layer at the lower part of the base are laminated through the heat-sealable heat-sealable resin layer,
The fuselage further has a folding portion folded inward from the lower opening edge to surround the lower portion of the bottom body,
The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and are folded back on the inside of the heat-sealable heat-sealable resin layer. A cup-shaped container characterized by lamination of negative metal foil layers. According to clause 10,
A cup-shaped container, wherein the bottom body is formed by drawing and molding a blank for the bottom body. According to clause 10,
A cup-shaped container, wherein the flange portion is folded downward and formed into a flat shape. According to clause 10,
A cup-shaped container, characterized in that the flange portion is curled downward and formed into a cross-sectional arc shape. The fuselage blank is formed into a cylindrical shape by overlapping and joining the two ends of the fuselage blank in a joint shape, and has a flange bent outward at the upper opening edge, and a lower part is formed on the outer periphery of the floor blank. In the cup-shaped container, which is made of a bottom body of an inverted U-shaped cross-section that is molded as much as possible, and where the body and the bottom body are integrated by joining the outer surface of the lower part of the bottom body to the inner surface of the lower end portion of the body,
The blank for the fuselage is formed of a laminate having a metal foil layer and a heat-sealable resin layer laminated on the inner side of the fuselage among both sides of the metal foil layer, but without a paper layer, and both end edges of the blank for the fuselage are overlapped in a joined shape. These heat-sealable resin layers are joined by heat-sealing each other, and metal foil layers at both edge edges are laminated through the heat-sealable heat-sealable resin layer,
The blank for the floor is formed from a laminate having a metal foil layer and a heat-sealable resin layer laminated on both sides of the metal foil layer, but not a paper layer, and the inner surface of the lower part of the fuselage and the outer surface of the lower part of the floor are formed of these. The heat-sealable resin layers are joined by heat-sealing each other, and the metal foil layer at the lower end of the fuselage and the metal foil layer at the lower part of the floor are laminated through the heat-sealable heat-sealable resin layer.
The fuselage further has a folding portion folded inward from the lower opening edge to surround the lower portion of the bottom body,
The folded portion of the fuselage and the lowered portion of the bottom are joined by heat-sealing the heat-sealable resin layers constituting their overlapping surfaces, and are folded back on the inside of the heat-sealable heat-sealable resin layer. A cup-shaped container characterized by lamination of negative metal foil layers. According to clause 14,
A cup-shaped container, wherein the bottom body is formed by drawing and molding a blank for the bottom body. According to clause 14,
The laminate forming the blank for the fuselage further has a heat-sealable resin layer laminated on one of both sides of the metal foil layer, which is the outer side of the fuselage,
A cup-shaped container characterized in that the joined portion of the fuselage is bent to one side so as to overlap the outer surface of the fuselage and is heat-sealed to the outer surface of the fuselage. According to clause 14,
A cup-shaped container, wherein the flange portion is folded downward and formed into a flat shape. According to clause 14,
A cup-shaped container, characterized in that the flange portion is curled downward and formed into a cross-sectional arc shape. delete delete delete delete delete

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