JP2023050962A - Blank material, paper container and paper container with lid material - Google Patents

Abstract

To provide blank material, a paper container and a paper container with lid material which enable the recyclability thereof to be improved.SOLUTION: Blank material 30 comprises: a bottom panel 31; a plurality of side panels 33 which are connected via a first polygonal line 32 to the bottom panel 31; and a plurality of flange piece panels 35 which are connected via a second polygonal line 34 to the respective side panels 33. A gap 36 is formed between the side panels 33. A first tab piece 111 is formed on the one flange piece panel 35. A second tab piece 112 forming a tab 100 together with the first tab piece 111 is formed on the other flange piece panel 35 that is opposed via the gap 36 to the one flange piece panel 35.SELECTED DRAWING: Figure 6

Description

The present disclosure relates to blanks, paper containers and paper containers with lids.

2. Description of the Related Art Conventionally, there have been known containers for housing take-out food and drink (so-called take-out products) and home delivery food and drink.

In recent years, there has been a demand for reducing the amount of resin used in such containers in order to reduce the problem of marine pollution and environmental impact. is in progress. As such a container, a paper container including a paper container and a formed film laminated on the inner wall of the paper container is known (for example, Patent Document 1). In such a paper container, after the food is filled, the paper container is covered with a cover material.

Japanese translation of PCT publication No. 2013-545675

By the way, in such a paper container, recycling of the paper used for the paper container is being promoted for the purpose of reducing the environmental load. Therefore, there is a need for a container that allows the consumer to easily peel off the formed film from the paper container after use and that allows the paper to be easily recycled.

The present disclosure has been made in consideration of such points, and an object thereof is to provide a blank material, a paper container, and a lid-attached paper container that can improve recyclability.

The blank according to one embodiment includes a bottom panel, a plurality of side panels connected to the bottom panel via a first fold line, and a plurality of side panels connected to each side panel via a second fold line, respectively. a flange piece panel defining a gap between said side panels; one flange piece panel defining a first tab piece; said one flange piece panel defining said gap; A blank member in which a second tab piece forming a tab together with the first tab piece is formed on another flange piece panel facing through.

In the blank material according to one embodiment, a first cutout portion is formed at the tip of the first tab piece, and a second cutout portion is formed at the tip of the second tab piece together with the first cutout portion. A notch may be formed.

In one embodiment of the blank material, in the one flange piece panel, the width of the first tab piece may be wider than the width of the other portion.

In one embodiment of the blank material, in the other flange piece panel, the width of the second tab piece may be wider than the width of the other portion.

A paper container according to one embodiment is a paper container comprising a paper container produced by assembling the blank materials according to the present disclosure, and a formed film laminated on the surface of the paper container.

A paper container according to one embodiment comprises a bottom portion, a plurality of side portions connected to the bottom portion via a first fold line, and a plurality of flange pieces connected to each side portion via a second fold line. and a formed film laminated on the surface of the paper container, wherein the side portions are adjacent to each other without being continuous, and a first tab piece is formed on one flange piece A second tab piece is formed on another flange piece adjacent to the one flange piece, and the formed film is removed from the paper container by the first tab piece and the second tab piece. A paper container formed with a tab for peeling.

In the paper container according to one embodiment, a first notch is formed at the tip of the first tab piece, a second notch is formed at the tip of the second tab piece, and the first notch is formed at the tip of the second tab piece. and the second cutout portion may form a cutout portion at the tip of the tab.

In the paper container according to one embodiment, the back surface of the formed film may be exposed at the notch.

In one embodiment of the paper container, in the one flange piece, the width of the first tab piece may be wider than the width of the other portion.

In one embodiment of the paper container, the width of the second tab piece in the other flange piece may be wider than the width of the other portion.

A lidded paper container according to one embodiment is a lidded paper container including the paper container according to the present disclosure and a lid that seals the paper container.

According to the present disclosure, it is possible to improve the recyclability of a paper container and a paper container with a lid member.

FIG. 1 is a vertical sectional view showing a paper container with lid material according to the present embodiment. FIG. 2 is a perspective view showing a paper container according to this embodiment. FIG. 3 is a plan view showing a paper container according to this embodiment. FIG. 4 is an enlarged plan view (enlarged plan view corresponding to part IV in FIG. 3) showing the paper container according to the present embodiment. FIG. 5 is a cross-sectional view (cross section taken along the line VV in FIG. 4) showing the paper container according to the present embodiment. FIG. 6 is a plan view showing a blank material according to this embodiment. FIG. 7 is an enlarged plan view (an enlarged plan view corresponding to the VII section in FIG. 6) showing the blank according to the present embodiment. FIG. 8 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. FIG. 9 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. FIG. 10 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. FIG. 11 is an enlarged plan view (a view corresponding to FIG. 4) showing a first modification of the paper container of the paper container according to the present embodiment. FIG. 12 is an enlarged plan view (a view corresponding to FIG. 7) showing a first modification of the blank according to the present embodiment. FIG. 13 is an enlarged plan view (a view corresponding to FIG. 4) showing a second modification of the paper container of the paper container according to the present embodiment. FIG. 14 is an enlarged plan view (a view corresponding to FIG. 7) showing a second modification of the blank according to the present embodiment. FIG. 15 is an enlarged plan view (a view corresponding to FIG. 4) showing another example of the second modification of the paper container of the paper container according to the present embodiment. FIG. 16 is an enlarged plan view (corresponding to FIG. 7) showing another example of the second modification of the blank according to the present embodiment. FIG. 17 is an enlarged plan view (a view corresponding to FIG. 4) showing a paper container of a comparative example. FIG. 18 is an enlarged plan view (a view corresponding to FIG. 7) showing a blank material of a comparative example.

Hereinafter, this embodiment will be described with reference to the drawings. 1 to 10 are diagrams showing this embodiment. Each figure shown below is a figure shown typically. Therefore, the size and shape of each part are appropriately exaggerated for easy understanding. In addition, it can be modified as appropriate without departing from the technical idea. In addition, in each figure shown below, the same code|symbol is attached|subjected to the same part and detailed description may be partially abbreviate|omitted. In addition, numerical values such as dimensions and material names of each member described in this specification are examples as an embodiment, and are not limited to these, and can be appropriately selected and used. In this specification, terms specifying shapes and geometrical conditions, such as parallel, orthogonal, and perpendicular terms, are interpreted to include substantially the same state in addition to strictly meaning. In this specification, the terms "upper" and "lower" respectively refer to the upper and lower sides of the paper container in an upright state (FIG. 1). In this specification, the term "surface" refers to the side facing the contents or the side facing upward when the paper container is erected.

Paper Container with Lid Material As shown in FIG. 1, the paper container 1 with lid material according to the present embodiment includes a paper container 10 and a lid material 50 for sealing the paper container 10 . Here, first, the paper container 10 will be described.

Paper Container As shown in FIGS. 1 to 3, the paper container 10 comprises a paper container 20 and a formed film 40 laminated on the surface of the paper container 20 . Among these, the paper container 20 is a container produced by assembling blank materials 30 to be described later.

(paper container)
The paper container 20 includes a bottom portion 21, a plurality of side portions 23 connected to the bottom portion 21 via first fold lines 22, and a plurality of flange pieces connected to each side portion 23 via second fold lines 24, respectively. 25.

Among them, the bottom portion 21 has a substantially rectangular shape in plan view. Note that the bottom portion 21 may have a polygonal shape such as an octagonal shape in plan view.

The first folding line 22 that connects the bottom portion 21 and the side portion 23 may be formed in a perforated line or a half-cut line. Thereby, the side portion 23 can be easily bent with respect to the bottom portion 21 . In the case where the first folding line 22 is formed in a perforated line, air is sucked from a suction hole 61 of a cavity-side mold 60, which will be described later. be forced. Thereby, the adhesion between the formed film 40 and the paper container 20 can be improved.

Each side portion 23 extends upward from the bottom portion 21 respectively. In the illustrated example, the carton 20 has four sides 23 . Specifically, the paper container 20 includes a pair of first side portions 23a extending along the short sides of the rectangle defined by the bottom portion 21 and a pair of second side portions extending along the long sides of the rectangle defined by the bottom portion 21. The side portion 23 is formed in an inverted truncated quadrangular pyramid shape as a whole. However, it is not limited to this, and the side portion 23 may be formed in a polygonal truncated pyramid shape such as an inverted octagonal truncated pyramid shape as a whole.

The multiple side portions 23 are adjacent to each other without being continuous with each other. That is, the side portions 23 are adjacent to each other without overlapping. Thereby, the adhesion between the side portion 23 and the formed film 40 can be improved over the entire circumference of the paper container 20 . In addition, since the side portions 23 are adjacent to each other without overlapping each other, it is possible to suppress pinholes or the like in the formed film 40 when the formed film 40 is adhered to the paper container 20 . Between the side portions 23, minute gaps are formed through which air can pass, and by sucking air from suction holes 61 of the cavity-side mold 60, which will be described later, the molded film 40 is pulled into the paper container 20. configured to be pressed against

The second folding line 24 that connects the side portion 23 and the flange piece 25 may be formed in a perforated pattern or a half-cut line, like the first folding line 22 . Thereby, the flange piece 25 can be easily bent with respect to the side portion 23 . When the second folding line 24 is formed in a perforated line, air is sucked from a suction hole 61 of a cavity-side mold 60, which will be described later. be forced. Thereby, the adhesion between the formed film 40 and the paper container 20 can be improved.

Each flange piece 25 protrudes horizontally from the upper end of the side portion 23 toward the side. In the illustrated example, the paper container 20 has four flange pieces 25 . Specifically, the paper container 20 includes a pair of first flange pieces 25a extending along the short sides of the rectangle defined by the bottom 21 and a pair of second flanges extending along the long sides of the rectangle defined by the bottom 21. The flange piece 25 has an annular shape as a whole.

The plurality of flange pieces 25 are adjacent to each other without being continuous. That is, the flange pieces 25 are adjacent to each other without overlapping each other. Thereby, the adhesion between the flange piece 25 and the formed film 40 can be improved over the entire circumference of the paper container 20 . In addition, since the flange pieces 25 are adjacent to each other without overlapping each other, it is possible to suppress the occurrence of pinholes or the like in the formed film 40 when the formed film 40 is adhered to the paper container 20 . Furthermore, since the flange pieces 25 are adjacent to each other without overlapping each other, when sealing the lid material 50 in the area corresponding to the flange piece 25 of the formed film 40 of the paper container 10, the formed film Adhesion between 40 and lid member 50 can be improved. Thereby, it is possible to suppress the occurrence of sealing failure of the lid member 50 . In this specification, the term “adjacent” refers to the case where adjacent members (for example, the flange pieces 25) are in contact with each other over the entire area without gaps, and the case where the following (1) or (2) applies. Also includes
(1) One member and another member are adjacent to each other in a state in which only a part of one member (eg, first flange piece 25a) is in contact with another member (eg, second flange piece 25b) to be
(2) One member (eg, first flange piece 25a) and another member (eg, second flange piece 25b) are not in contact with each other, and one member and another member are adjacent to each other In this case, at least part of the gap between the one member and the other member causes the formed film 40 (film 40a to be described later) to adhere to the one member and the other member. The gap must be such that it cannot be entered.

By the way, as shown in FIGS. 3 and 4, a first tab piece 101 is formed on one flange piece 25 . A second tab piece 102 is formed on another flange piece 25 adjacent to the one flange piece 25 . A tab 100 for peeling the formed film 40 from the paper container 20 is formed by the first tab piece 101 and the second tab piece 102 .

In the illustrated example, the first tab piece 101 is formed on the first flange piece 25a and the second tab piece 102 is formed on the second flange piece 25b. The tab 100 is formed so as to straddle the first flange piece 25a and the second flange piece 25b. As a result, the molded film 40 can be easily peeled off from the flange pieces 25 by the consumer pinching the tab 100 with the fingers of one hand and pulling the molded film 40 with the fingers of the other hand. That is, the consumer can pull the formed film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. Therefore, the molded film 40 can be easily peeled off from both the first flange piece 25a and the second flange piece 25b. Such first tab piece 101 and second tab piece 102 are mutually arranged with respect to a predetermined axis of symmetry (in the illustrated example, the boundary line between the first flange piece 25a and the second flange piece 25b). It may have a line-symmetrical shape. Although not shown, the first tab piece 101 may be formed on the second flange piece 25b, and the second tab piece 102 may be formed on the first flange piece 25a.

As shown in FIG. 4, in the first flange piece 25a, the width W1 of the first tab piece 101 may be wider than the width W3 of the other portions. This makes it easier for the consumer to pick up the first tab piece 101 when picking up the tab 100 . The width W1 of the first tab piece 101 may be 10 mm or more and 20 mm or less. Since the width W1 of the first tab piece 101 is 10 mm or more, the first tab piece 101 can be easily picked up by the consumer. Moreover, since the width W1 of the first tab piece 101 is 20 mm or less, it is possible to prevent the first tab piece 101 from becoming an obstacle when the paper container 10 is conveyed. On the other hand, the width W3 of other portions may be 3 mm or more and 15 mm or less.

Also, in the second flange piece 25b, the width W2 of the second tab piece 102 may be wider than the width W4 of the other portion. This makes it easier for the consumer to pick up the second tab piece 102 when picking up the tab 100 . The width W2 of the second tab piece 102 may be 10 mm or more and 20 mm or less. Since the width W2 of the second tab piece 102 is 10 mm or more, the second tab piece 102 can be easily picked up by the consumer. Further, since the width W2 of the second tab piece 102 is 20 mm or less, it is possible to prevent the second tab piece 102 from becoming an obstacle when the paper container 10 is conveyed. On the other hand, the width W4 of other portions may be 3 mm or more and 15 mm or less.

A first notch 103 is formed at the tip of the first tab piece 101 . A second notch 104 is formed at the tip of the second tab piece 102 . A notch portion 105 is formed at the tip of the tab 100 by the first notch portion 103 and the second notch portion 104 . In the illustrated example, the first notch 103 cuts out the first tab piece 101 in an arc shape. Similarly, the second cutout portion 104 cuts out the second tab piece 102 in an arc shape. Therefore, the notch 105 cuts the tab 100 in an arc shape.

As shown in FIG. 5, the rear surface 40b of the molding film 40 is exposed at the notch 105. As shown in FIG. This makes it easier for the consumer to pick up the formed film 40 at the notch 105 .

Moreover, the tab 100 may be provided with a non-adhesive region R (shaded portion in FIGS. 4 and 5) to which the forming film 40 is not adhered. It is preferable that the non-bonded region R is formed so as to straddle the first flange piece 25a and the second flange piece 25b. This makes it easier for the consumer to pick up the formed film 40 with the fingers of one hand while picking up the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. In addition, the non-bonded region R may extend to reach the outer edge 100a of the tab 100. As shown in FIG. Furthermore, it is preferable that the non-adhesive region R is provided so as to surround the notch portion 105 . This allows the consumer to pick up the tab 100 easily. In addition, the non-adhesive region R may be provided so as to surround the entire outer edge 100a of the tab 100 .

(blank material)
Next, the blank material 30 for producing the paper container 20 will be described. As shown in FIG. 6, the blank 30 includes a bottom panel 31, a plurality of side panels 33 connected to the bottom panel 31 via a first fold line 32, and a second fold line attached to each side panel 33, respectively. a plurality of flange strip panels 35 connected via 34; The bottom panel 31, the first fold line 32, the side panel 33, the second fold line 34 and the flange piece panel 35 of the blank 30 correspond to the bottom portion 21, the first fold line 22, the side portion 23 and the second fold line 24 of the paper container 20, respectively. and the flange piece 25 . In the illustrated example, the blank 30 includes four side panels 33 and four flange strip panels 35 .

A gap 36 is formed between the side panels 33 . Each side panel 33 also has a pair of side edges 33c extending from the bottom panel 31 respectively. A gap 36 is formed between the side edges 33 c of the side panel 33 . As a result, in the paper container 10 described above, the side portions 23 do not overlap and are adjacent to each other (see FIGS. 2 and 3).

As mentioned above, the side panels 33 of the blank 30 correspond to the sides 23 of the carton 20 . Thus, the blank 30 includes a pair of first side panels 33a extending along the short sides of the rectangle defined by the bottom panel 31 and a pair of second side panels 33a extending along the long sides of the rectangle defined by the bottom panel 31. and a side panel 33b.

Further, as described above, the flange piece panel 35 of the blank material 30 corresponds to the flange piece 25 of the paper container 20 . Thus, the blank 30 includes a pair of first flange piece panels 35a extending along the short sides of the rectangle defined by the bottom panel 31 and a pair of second flange piece panels 35a extending along the long sides of the rectangle defined by the bottom panel 31. and a flange piece panel 35b.

Here, as shown in FIGS. 6 and 7 , a first tab piece 111 is formed on one flange piece panel 35 . A second tab piece 112 is formed on another flange piece panel 35 that faces the one flange piece panel 35 with a gap 36 interposed therebetween. The second tab piece 112 is a part that forms the tab 100 of the paper container 20 described above together with the first tab piece 111 . In the illustrated example, a first tab piece 111 is formed on the first flange piece panel 35a and a second tab piece 112 is formed on the second flange piece panel 35b.

The first tab piece 111 and the second tab piece 112 are parts corresponding to the first tab piece 101 and the second tab piece 102 of the paper container 20, respectively. Therefore, as shown in FIG. 7, the first tab piece 111 and the second tab piece 112 may have shapes that are line-symmetrical with respect to a predetermined symmetrical axis.

Also, in the first flange piece panel 35a, the width w1 of the first tab piece 111 may be wider than the width w3 of the other portions. This makes it easier for the consumer to pick up the first tab piece 101 when picking up the tab 100 . The width w1 of the first tab piece 111 may be 10 mm or more and 20 mm or less. On the other hand, the width w3 of the other portion may be 3 mm or more and 15 mm or less.

Also, in the second flange piece panel 35b, the width w2 of the second tab piece 112 may be wider than the width w4 of the other portion. This makes it easier for the consumer to pick up the second tab piece 102 when picking up the tab 100 . The width w2 of the second tab piece 112 may be 10 mm or more and 20 mm or less. On the other hand, the width w4 of the other portion may be 3 mm or more and 15 mm or less.

Further, a first notch portion 113 is formed at the tip of the first tab piece 111 and a second notch portion 114 is formed at the tip of the second tab piece 112 . The first cutout portion 113 and the second cutout portion 114 are portions corresponding to the first cutout portion 103 and the second cutout portion 104 of the paper container 20, respectively. Therefore, the first cutout portion 113 cuts out the first tab piece 111 in an arc shape, and the second cutout portion 114 cuts out the second tab piece 112 in an arc shape.

The bottom panel 31, the side panels 33 and the flange piece panels 35 of such a blank 30 are integrally formed. The blank material 30 can be produced by subjecting a paper material forming the blank material 30 to punching or the like.

Examples of the paper material that constitutes the blank material 30 include various types of paperboard, coated paper, card paper, ivory paper, milk carton base paper, cup base paper, coated board, etc., each having a basis weight of about 150 g/m ² or more and 800 g/m ² or less. processed paper or the like can be used.

(molded film)
Next, the molded film 40 will be described with reference to FIGS. 1 to 5. FIG. This molded film 40 serves to protect the paper container 20 . The molded film 40 has a container shape and covers the entire surface of the paper container 20 . This prevents the content filled in the paper container 10 from leaking out of the paper container 10 . The molded film 40 is adhered to the paper container 20 by, for example, heat sealing (thermal welding).

Such a molded film 40 may be a film made of a thermoplastic resin having water resistance, sealability, and heat-sealability. Examples of the molded film 40 include various types of polyethylene (PE), polypropylene (PP), polyvinyl chloride, polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer, ionomer, and ethylene-acrylic acid copolymer. , polyamide, polyvinylidene chloride, polystyrene, ethylene-vinyl acetate copolymer saponified product, polycarbonate, polybutene, polyvinyl alcohol, and other various thermoplastic resin films can be used alone or laminated. In particular, when it is desired to impart gas barrier properties to the paper container 10, for example, a laminate obtained by laminating a gas barrier material such as ethylene-vinyl alcohol copolymer (EVOH) as an intermediate layer, specifically PE A laminate having a layer structure such as /EVOH/PE, PP/EVOH/PE, and A (amorphous).PET/EVOH/PE can be used. Note that "/" means a boundary between adjacent layers.

The molded film 40 may be produced, for example, from a laminate having the following layer structure.
(Outside) Polyethylene (40 μm)/Ionomer (40 μm)/Polyethylene (40 μm) (Inside)
(Outside) polypropylene (30 μm)/adhesive layer (10 μm)/ionomer (40 μm)/adhesive layer (10 μm)/polypropylene (30 μm) (inner)
(Outside) polyethylene (20 μm)/ionomer (30 μm)/adhesive layer (10 μm)/ethylene-vinyl alcohol copolymer (10 μm)/adhesive layer (10 μm)/ionomer (15 μm)/ethylene/vinyl acetate copolymer (20 μm) ) (inside)

Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method or other coating method according to a conventional method.

Lid Material Next, the lid material 50 will be described. The lid member 50 is sealed over the entire periphery of the formed film 40 of the paper container 10 in the area corresponding to the flange piece 25 .

Such a lid material 50 includes layers such as, for example, a PET/sealant layer, a PP/sealant layer, a PET/PP/sealant layer, a PET/PE/sealant layer, a K-coated oriented nylon (KON)/PE/sealant layer, and the like. Laminates of construction can be used. Also, the laminate constituting the lid member 50 may be, for example, a laminate in which a gas barrier material such as ethylene-vinyl alcohol copolymer (EVOH) is laminated as an intermediate layer. For the lid member 50, for example, a laminate having a layer structure such as PET/PE/ethylene-vinyl alcohol copolymer (EVOH)/PE/sealant layer can be used. Also, an aluminum foil or a vapor deposition film (aluminum vapor deposition or transparent vapor deposition) may be used as the barrier layer. Furthermore, it is preferable to use the resin material which can express what is called easy peel property for a sealant.

The lid member 50 may be made of, for example, a laminate having the following layer structure.
(Outside) Polyethylene terephthalate film with transparent vapor deposition layer (12 μm)/Nylon film (15 μm)/Polyethylene film (40 μm) (Inside)

Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method or other coating method according to a conventional method.

In the lid-equipped paper container 1 having such a configuration, the contents are first filled into the paper container 10 . Next, the cover material 50 is sealed to the area corresponding to the flange piece 25 in the formed film 40 of the paper container 10 . As a result, the lid-attached paper container 1 filled with the contents is obtained. Note that the paper container 1 with a lid may be a container for chilled foods or frozen foods, or can be used as a take-out container. Also, the contents may be foods such as side dishes, meat, and dairy products.

Next, the operation of this embodiment having such a configuration will be described. Here, a method for manufacturing the paper container 10 and a method for manufacturing the lid-attached paper container 1 will be described with reference to FIGS. 8 to 10. FIG.

Paper Container Manufacturing Method First, a blank material 30 is prepared. At this time, the blank material 30 is obtained by first preparing a paper material and then subjecting the paper material to a punching process or the like.

Next, as shown in FIG. 8, the blank material 30 is attached to the cavity-side mold 60 . A suction hole 61 is formed in the cavity-side mold 60 , and the blank material 30 is attached to the cavity-side mold 60 by sucking air through the suction hole 61 . At this time, the side panel 33 of the blank 30 is folded against the bottom panel 31 along the first folding line 32 . Similarly, flange strip panel 35 of blank 30 is folded against side panel 33 along second fold line 34 . As a result, the paper container 20 attached to the cavity side mold 60 is obtained.

Next, the formed film 40 is laminated on the surface of the paper container 20 . At this time, first, as shown in FIG. 9, the film 40a constituting the molded film 40 is arranged above the paper container 20. Then, as shown in FIG. Next, the film 40a is heated by the core side mold 62 (see FIG. 10). After the film 40 a is sufficiently heated by the core side mold 62 , air is sucked through the suction holes 61 . As a result, the film 40a is sucked onto the paper container 20 as shown in FIG. Also, at this time, the core-side mold 62 presses the film 40 a against the paper container 20 . As a result, the film 40a adheres to the paper container 20. As shown in FIG.

After that, the film 40a is cut into a desired shape by a cutting mechanism 63 provided on the core side die 62 . Thereby, as shown in FIG. 10, the molded film 40 laminated on the paper container 20 is obtained. Thus, the paper container 10 is obtained.

Next, a method for manufacturing the lid-equipped paper container 1 will be described.

First, in parallel with manufacturing the paper container 10, the lid member 50 is prepared. At this time, a predetermined laminate is produced by a dry lamination method or the like. After that, the lid member 50 is manufactured by punching out the laminate into a predetermined shape with a knife or the like.

Next, the paper container 10 is filled with contents, and the paper container 10 is sealed with the lid member 50 . At this time, first, the paper container 10 is filled with contents (not shown). Next, the lid member 50 is placed on the molded film 40 at a position corresponding to the flange piece 25 .

Next, the lid member 50 is sealed to the forming film 40 by a hot sealing plate or the like (not shown). At this time, the air in the paper container 10 may be replaced with, for example, nitrogen gas.

In this way, the paper container 1 with a lid, which includes the paper container 10 and the lid 50 that seals the paper container 10, is obtained.

As described above, according to the present embodiment, the first flange piece 25a (one flange piece 25) is formed with the first tab piece 101, and the second flange piece 25b adjacent to the first flange piece 25a is formed. A second tab piece 102 is formed on (another flange piece 25). A tab 100 for peeling the formed film 40 from the paper container 20 is formed by the first tab piece 101 and the second tab piece 102 . This allows the consumer to pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the formed film 40 with the fingers of the other hand. Therefore, deformation of the first flange piece 25a and the second flange piece 25b can be suppressed when peeling the formed film 40 from the paper container 20 .

On the other hand, in the paper container, if the tab 100 composed of the first tab piece 101 and the second tab piece 102 is not formed, when peeling the formed film 40 from the paper container 20, the consumer may It may be difficult to simultaneously pinch the first flange piece 25a and the second flange piece 25b with the fingers of one hand. In this case, when the formed film 40 is peeled from the paper container 20, the deformation of the first flange piece 25a or the second flange piece 25b may make it difficult to peel the formed film 40 from the paper container 20A. There is

On the other hand, in the present embodiment, the first tab piece 101 and the second tab piece 102 form the tab 100 for peeling the formed film 40 from the paper container 20 . This allows the consumer to simultaneously pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand when peeling the formed film 40 from the paper container 20 . Therefore, deformation of the first flange piece 25a and the second flange piece 25b can be suppressed when peeling the formed film 40 from the paper container 20 . As a result, the molded film 40 can be easily peeled off from both the first flange piece 25a and the second flange piece 25b. Therefore, when recycling the paper container 20, the paper container 20 and the formed film 40 can be easily separated.

Further, according to this embodiment, the first notch 103 is formed at the tip of the first tab piece 101 . A second notch 104 is formed at the tip of the second tab piece 102 . A notch portion 105 is formed at the tip of the tab 100 by the first notch portion 103 and the second notch portion 104 . This makes it easier for the consumer to pick up the formed film 40 at the notch 105 .

Further, according to the present embodiment, the rear surface 40b of the molding film 40 is exposed at the cutout portion 105 . This makes it easier for the consumer to pick up the formed film 40 at the notch 105 .

Further, according to the present embodiment, in the first flange piece 25a, the width W1 of the first tab piece 101 is wider than the width W3 of the other portions. This makes it easier for the consumer to pick up the first tab piece 101 when picking up the tab 100 .

Furthermore, according to the present embodiment, in the second flange piece 25b, the width W2 of the second tab piece 102 is wider than the width W4 of the other portions. Even in this case, this makes it easier for the consumer to pick up the second tab piece 102 when picking up the tab 100 .

Modifications Modifications of the paper container 10 and the blank 30 according to the present embodiment will now be described with reference to FIGS. 11 to 16. FIG. 11 to 16, the same parts as in the embodiment shown in FIGS. 1 to 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.

(First modification)
In the example shown in FIG. 11, the notch 105 is not formed at the tip of the tab 100 . In this case, the molded film 40 may cover the entire area of the tab 100 and protrude from the tab 100 in plan view. This makes it easier for the consumer to pick up the formed film 40 .

Further, in this modification, as shown in FIG. 12 , the first notch 113 is not formed at the tip of the first tab piece 111 in the blank 30 . Also, the second notch 114 is not formed at the tip of the second tab piece 112 .

In this modification as well, the consumer can pull the formed film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. Therefore, the molded film 40 can be easily peeled off from both the first flange piece 25a and the second flange piece 25b.

(Second modification)
In the example shown in FIG. 13, the first tab piece 101 and the second tab piece 102 do not have shapes that are line-symmetrical to each other. In this case, for example, the length of the second tab piece 102 may be longer than the length of the first tab piece 101 . For example, the second tab piece 102 may be formed over the entire area of the second flange piece 25b. At this time, the outer edge of the second tab piece 102 may extend straight along the longitudinal direction of the second flange piece 25b. In this case, when the paper container 10 is produced, the film 40a in close contact with the paper container 20 can be cut by, for example, a cutter with a round blade. Therefore, the step of cutting the film 40a can be easily performed. In this specification, the length of the first tab piece (second tab piece) refers to the length along the longitudinal direction of the flange piece on which the first tab piece (second tab piece) is formed.

Further, in this modification, as shown in FIG. 14, in the blank 30, the first tab piece 111 and the second tab piece 112 do not have shapes that are line-symmetrical to each other. In this case, the length of the second tab piece 112 may be longer than the length of the first tab piece 111 .

In this modification as well, the consumer can pull the formed film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. Therefore, the molded film 40 can be easily peeled off from both the first flange piece 25a and the second flange piece 25b.

In addition, as shown in FIG. 15, the notch 105 may not be formed at the tip of the tab 100 . In this case, the molded film 40 may cover the entire tab 100 in plan view. Also, although not shown, the molded film 40 may protrude from the tab 100 . This makes it easier for the consumer to pick up the formed film 40 .

Further, in this case, as shown in FIG. 16 , in the blank 30 , the first notch 113 may not be formed at the tip of the first tab piece 111 . Also, the second notch 114 may not be formed at the tip of the second tab piece 112 .

In this case as well, the consumer can pull the formed film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. Therefore, the molded film 40 can be easily peeled off from both the first flange piece 25a and the second flange piece 25b.

Next, specific examples in the above embodiment will be described.

(Example 1)
First, a blank material 30 shown in FIG. 7 was produced. In this case, coated paper having a basis weight of 350 g/m ² was prepared as the material of the blank material 30 . Then, the blank material 30 was produced by punching the coated paper into a predetermined shape.

Next, the paper container 20 was manufactured by mounting the obtained blank material 30 on the cavity side mold 60 and assembling them.

Next, as the molded film 40, a film (thickness: 120 μm) having the following layer structure was prepared.
PE (40 μm)/Ionomer (40 μm)/PE (40 μm)
Next, a paper container 10 was produced by laminating a film on the surface of the paper container 20 .

Next, a film having the following layer structure was prepared as the lid member 50, and the paper container 10 was sealed with the film.
PET (12 μm)/PE (50 μm)
In this manner, the paper container 1 with a lid shown in FIG. 1 was produced.

(1) Unsealability Evaluation Test Next, an unsealability evaluation test was conducted. At this time, first, the lid member 50 was removed from the paper container 10 of the manufactured paper container 1 with lid member. Then, ease of removal of the lid member 50 was evaluated.

(2) Peelability Evaluation Test Next, a peelability evaluation test was conducted. At this time, the formed film 40 was peeled off from the paper container 20 of the paper container 10 . Then, the ease of peeling of the molded film 40 was evaluated.

(Example 2)
An openability evaluation test and a peelability evaluation test were conducted in the same manner as in Example 1, except that the paper container 10 shown in FIG. 11 was produced.

(Example 3)
An openability evaluation test and a peelability evaluation test were conducted in the same manner as in Example 1, except that the paper container 10 shown in FIG. 13 was produced.

(Example 4)
An openability evaluation test and a peelability evaluation test were conducted in the same manner as in Example 1, except that the paper container 10 shown in FIG. 15 was produced.

(Comparative example 1)
As shown in FIG. 17, an unsealability evaluation test and a peelability evaluation test were performed in the same manner as in Example 1, except that a paper container 10A including a paper container 20A in which the first tab piece 101 was not formed was produced. did At this time, first, as shown in FIG. 18, a blank material 30A in which the first tab piece 111 was not formed was produced. Then, using the blank material 30A, a paper container 10A shown in FIG. 17 was manufactured. After that, an unsealability evaluation test and a peelability evaluation test were conducted.

Table 1 shows the above results.

In the column of the openability evaluation test in Table 1 above, "○" means that the lid material could be easily removed from the paper container.

In addition, in the column of peelability evaluation test in Table 1 above, "○" means that the formed film was easily peeled from the paper container. Also, "x" means that it was difficult to peel the formed film from the paper container.

As a result, as shown in Table 1, in the lid-equipped paper container according to Comparative Example 1, the lid could be easily removed from the paper container 10A. Also, in the lid-equipped paper containers 1 according to Examples 1 to 4, the lid 50 could be easily removed from the paper container 10 .

On the other hand, in the paper container 10A according to Comparative Example 1, it was difficult to separate the formed film 40 from the paper container 20A. That is, in the paper container 10A according to Comparative Example 1, since the first tab piece 101 is not formed on the paper container 20A, when the experimenter pinches the second tab piece 102 with the fingers of one hand, The finger could not pinch the first flange piece 25a. Therefore, when the molded film 40 is peeled off from the paper container 20A, the first flange piece 25a and the first side portion 23a are deformed, making it difficult to peel off the molded film 40 from the paper container 20A.

On the other hand, in the paper containers 10 according to Examples 1 to 4, the experimenter held the first tab piece 101 and the second tab piece 102 with the fingers of one hand and held the fingers of the other hand. The formed film 40 could be pulled at . In particular, in the paper containers 10 according to Examples 1 and 3, the experimenter could easily pick up the formed film 40 at the notch 105 . In addition, in the paper containers 10 according to Examples 2 and 4, the experimenter could easily pick up the first tab piece 101 and the second tab piece 102 with the fingers of one hand. Therefore, the experimenter could easily pull the formed film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. As a result, the formed film 40 could be easily peeled off from the paper container 20 .

The present disclosure is not limited to the above-described embodiment and modifications as they are, and can be embodied by modifying constituent elements without departing from the gist of the present disclosure at the implementation stage. Also, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in the above embodiment and modifications. Some components may be deleted from all the components shown in the embodiment and each modification.

1 paper container with lid 10 paper container 20 paper container 21 bottom 22 first fold line 23 side portion 24 second fold line 25 flange piece 25a first flange piece 25b second flange piece 30 blank material 31 bottom panel 32 first fold line 33 Side Panel 34 Second Folding Line 35 Flange Piece Panel 35a First Flange Piece Panel 35b Second Flange Piece Panel 40 Forming Film 40b Back Side 50 Lid Material 100 Tab 101 First Tab Piece 102 Second Tab Piece 103 First Notch 104 second notch 105 notch 111 first tab piece 112 second tab piece 113 first notch 114 second notch

Claims (11)

a bottom panel;
a plurality of side panels connected to the bottom panel via a first fold line;
a plurality of flange strip panels each connected to each side panel via a second fold line;
a gap is formed between the side panels;
A first tab piece is formed on one flange piece panel,
A blank member, wherein a second tab piece forming a tab together with the first tab piece is formed on another flange piece panel facing the one flange piece panel through the gap. A first cutout portion is formed at the tip of the first tab piece, and a second cutout portion forming the cutout portion together with the first cutout portion is formed at the tip of the second tab piece. The blank according to claim 1. The blank material according to claim 1 or 2, wherein the width of the first tab piece in the one flange piece panel is wider than the width of other portions. The blank material according to any one of claims 1 to 3, wherein the width of the second tab piece in the other flange piece panel is wider than the width of the other portion. A paper container produced by assembling the blank material according to any one of claims 1 to 4;
and a formed film laminated on the surface of the paper container. A paper container having a bottom portion, a plurality of side portions connected to the bottom portion via a first fold line, and a plurality of flange pieces connected to each side portion via a second fold line, respectively;
A formed film laminated on the surface of the paper container,
The side portions are adjacent to each other without being continuous,
A first tab piece is formed on one flange piece,
A second tab piece is formed on another flange piece adjacent to the one flange piece,
A paper container, wherein the first tab piece and the second tab piece form a tab for peeling the formed film from the paper container. A first notch is formed at the tip of the first tab piece, and a second notch is formed at the tip of the second tab piece. 7. The paper container according to claim 6, wherein a notch is formed at the tip of said tab. The paper-made container according to claim 7, wherein the back surface of the formed film is exposed at the notch. The paper-made container according to any one of claims 6 to 8, wherein the width of the first tab piece in the one flange piece is wider than the width of the other portion. 10. The paper container according to any one of claims 6 to 9, wherein the width of the second tab piece in the other flange piece is wider than the width of the other portion. The paper container according to any one of claims 5 to 10;
A paper container with a lid, comprising a lid that seals the paper container.

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