JP2022127530A - Zippered paper container - Google Patents

Abstract

To provide a zippered paper container in which a bent portion of a top protruding portion is less likely to be damaged (cracked) when the top protruding portion is bent toward a body of the zippered paper container and is jointed to the body.SOLUTION: A top protruding portion bent line 15b is provided at a bent portion 76 of a top protruding portion 74. The bent portion 76 of the top protruding portion 74 is generated when the top protruding portion 74 continually provided on both sides of a top portion 71 of the zippered paper container 90 is joined to a body portion 72 of the respective zippered paper container 90. The top protruding portion bend line 15b is convex in the inside direction of the zipped paper container 90.SELECTED DRAWING: Figure 9

Description

The present disclosure relates to a paper container with a zipper, particularly in the field of paper containers having a three-dimensional shape and being self-supporting. The present invention relates to a zippered paper container capable of retaining its properties.

Conventionally, a technique such as Patent Document 1 has been disclosed as a paper container with a zipper. That is, a chuck is provided on the top of the rectangular parallelepiped paper container, and the chuck can be opened when taking out the contents, and can be closed after the contents have been taken out.

The above technology can protect the contents and prevent the contents from spilling when the paper container is overturned. Moreover, since it is a paper container, it is easy to reduce the volume of the container after the contents are consumed and to dispose of the container easily. FIG. 1 shows a blank plate 81 used for manufacturing a conventional paper container 80 with a zipper, FIG. 2 shows a perspective view of the conventional paper container 80 with a zipper, and FIG. 3 shows a plan view.
An easy-to-open processing line 851 for opening the top portion 871 of the paper container 80 with a zipper sequentially from the upper edge of the paper container 80 with a zipper, and a zipper tape 861 capable of freely opening and closing the top portion 871 of the paper container 80 with a zipper that has been opened. There is

Unless otherwise specified, referring to FIG. , upper side and lower side. The same applies to the zippered paper container 90 of the present disclosure.
Also, the reference numerals used when describing the prior art are 80s or 800s to distinguish them from the present disclosure.

The laminated sheet 88 of the blank plate 81 has a paper base layer and a synthetic resin layer on at least the back surface thereof. Further, these synthetic resin layers may be a single layer or multiple layers.

As an example, a laminate sheet 88 having a three-layer configuration is shown in FIG. 5A. Note that the laminated sheet 78 of the paper container 90 with a zipper of the present disclosure is also similar to the paper container 80 with a zipper of the prior art, and therefore will be described using the same drawings. The layer structure is as follows.
(Surface) Outermost thermoplastic resin layer 881 / paper base layer 882 /
Innermost thermoplastic resin layer 883 (back side)

Also, as an example, a laminate sheet 88 having a two-layer structure is shown in FIG. 5B. The layer structure is as follows.
(Front side) Paper base layer 882 / Innermost thermoplastic resin layer 883 (Back side)
This is a layer configuration in which the outermost thermoplastic resin layer 781 is removed from the three-layer blank plate 10 shown in FIG. 5A.

Moreover, a barrier layer 885 can be provided when the laminated sheet 88 requires barrier properties (water vapor, oxygen, fragrance retention, etc.). FIG. 5C is a cross-sectional view of a laminate sheet 88 consisting of five layers, the layer structure of which is as follows.
(Surface) Outermost thermoplastic resin layer 881 / paper base layer 882 /
Intermediate adhesive layer 884 / barrier layer 885 / innermost thermoplastic resin layer 883
(Back side)

FIG. 5D is a cross-sectional view of a laminate sheet 88 consisting of four layers, the layer structure of which is as follows.
(Front Side) Paper Base Layer 882 / Intermediate Adhesive Layer 884 / Barrier Layer 885 / Innermost Thermoplastic Resin Layer 883 (Back Side)
This is a layer configuration in which the outermost thermoplastic resin layer 881 is removed from the laminated sheet 88 consisting of five layers shown in FIG. 5C.

The bonding between the layers of each laminated sheet 88 is performed by known dry lamination, extrusion coating, adhesives, or the like. Note that layers for bonding between layers are not shown because they are thin.

The outermost thermoplastic resin layer 881 and the innermost thermoplastic resin layer 883 are, for example, low density polyethylene (LDPE). Intermediate adhesive layer 884 is, for example, random copolymer of ethylene methacrylic acid (EMAA). Barrier layer 885 is silica-deposited PET as an example.

However, if the top side protruding portion 874 is strongly bent in the direction of the body portion 872 (bent at a substantially right angle), the top side protruding portion 874 is interposed between the upper overlapping plate 834 and the top plate 833. , the outer surface of the bent portion 876 of the top side projecting portion 874 is strongly stretched, and as shown in FIG. may occur.
Note that FIG. 4 is an enlarged view of a part of the cross section at the cross section position AA shown in FIG. A zipper tape 861 is included in its cross section.

The illustrated damage (crack) is an example of damage, and the mode of damage is not limited to these.

This is because the upper portion of the paper container 80 with a zipper of the prior art is sealed by joining the inner surfaces of the upper overlapping plate 834 to seal the container, so that the number of layers in that portion increases and the thickness increases. is.
Furthermore, since the zipper tape 861 is also joined to the upper overlapping plate 834, the number of layers in this portion increases and the thickness of this portion increases.

In FIG. 4, the cross section of the laminated sheet 88 of the blank plate 81 of the conventional paper container 80 with a zipper is shown as a single layer, but the laminated sheet 88 of the blank plate 81 has a multilayer structure. is 88. However, in this figure, a single layer is shown to make the figure easier to see.

At the bent portion 876 of the top side projecting portion 874, the four laminated sheets 88 and the zipper tape 861 are overlapped. With reference to each component described on the blank plate 81 in FIG. Connecting portion between the upper overlapping plate 834a and the side plate 843a of the back side top portion, connecting portion between the back side top plate 833a and the back side top portion protrusion portion 838a, back side plate 832a and the back side top side protrusion portion allowance 838a.

Most of the laminated sheets 88 of the paper container 80 with a zipper of the prior art are laminated with a paper base layer 882 and a synthetic resin film layer, and cracks occur in the paper base layer 882, which is inferior in tensile strength among its constituent elements. likely to occur. If the stretching is particularly strong, along with the cracking of the paper base layer 882, the inner synthetic resin film layer may also crack.

If the synthetic resin film layer is cracked, the barrier properties (oxygen, water vapor, fragrance retention, etc.) of the laminated sheet 88 may be degraded. In particular, when the synthetic resin film layer itself has a barrier property, or when the synthetic resin film layer is subjected to a vapor deposition process, the barrier property may be lowered.

Damage (cracks) 879 of the laminated sheet 88 are generated irregularly, and the paper base layer 882 at the cross section of the damages (cracks) 879 is torn and ugly. Therefore, the appearance of the paper container 80 with a zipper is deteriorated, and if there is printing on the relevant portion of the laminated sheet 88, the printed characters and patterns may be damaged.

JP-A-2005-178833

The present disclosure has been made to solve the above problems, and the problem is to bend the top side protruding portion 74 in the direction of the body portion 72 of the paper container 90 in the paper container 90 with a zipper. Bending of the top side protrusion 74 interposed between the top side protrusion 74 and the front side top plate 33b and the front side upper overlapping plate 34b when joining to the body portion 72 by To provide a zippered paper container 90 in which the part 76 is less likely to be damaged (cracked).

The above problems can be solved by the following embodiments of the present disclosure.
That is, the zipper-equipped paper container 90 of the present disclosure is
In a zippered paper container 90 assembled by joining a front side blank plate 10b and a back side blank plate 10a made of a laminated sheet 78 using paper as a base material,
An upper overlapping plate 34, which is joined by overlapping the front side blank plate 10b and the back side blank plate 10a on the upper part of the paper container 90 with a zipper, and the lower side of the upper overlapping plate 34 A top portion 71 consisting of a top plate 33 connected to the
a top side plate 41 connected to the left and right sides of the upper overlapping plate 34;
a top side projecting portion 74 continuously provided on both left and right sides of the top portion 71;
a body portion 72 provided on the lower side of the top portion 71;
a bottom portion 73 provided on the underside of the trunk portion 72;
an upper sealing portion 53 that traverses the upper edge portion 21 of the upper overlapping plate 34 and the top side plate 41 or the vicinity of the upper edge portion 21;
a zipper tape 61 located under the upper sealing portion 53 and crossing the upper overlapping plate 34 and the side plate 41 of the top portion,
The top side protruding portions 74 connected to the left and right sides of the top portion 71 of the paper container 90 with a zipper are joined to the body portion 72 of the paper container 90 with a zipper. At the bent portion 76 of the side protrusion 74, the top side protrusion bending line 15 is provided so that the inner side of the zipper-equipped paper container 90 is convex.

Here, the laminate sheet 78 of the blank plate 10 of the zippered paper container 90 used in the present disclosure is similar to the laminate sheet 88 of the prior art.

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The top side protrusion bending line 15 may be provided at least on the front side blank plate 10b.

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The top side protrusion bending line 15 may be provided on both the front side blank plate 10b and the back side blank plate 10a.

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The top side protrusion bending line 15 may be a smooth curve.

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The top side protrusion bending line 15 may be a single arc.

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
The folding line provided in the folding portion 76 of the top side protrusion 74 may be only the top side folding line 15 .

In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure,
A first horizontal folding line 22, a second horizontal folding line 23, a third horizontal folding line 24, a fourth horizontal folding line 24, and a fourth horizontal folding line are formed in order from the upper edge 21 on the front side blank plate 10b and the back side blank plate 10a. A line 25 is provided,
The blank plate 10 is provided with a first vertical folding line 12 and a second vertical folding line 13 sequentially from the side edges 11 on both sides,
The second longitudinal fold line 13 extends from the second lateral fold line 23 to the lower edge 26 and may not exist in the direction from the second lateral fold line 23 to the upper edge 21 .

According to the embodiment of the present disclosure described above, the top side protruding portions 74 connected to the left and right sides of the top portion 71 of the zipper-equipped paper container 90 are joined to the body portion 72 of the zipper-equipped paper container 90. Since the bent portion 76 of the top side protruding portion 74 is bent with a large curvature when the top side protruding portion 74 is bent, the load applied to the bent portion 76 of the top side protruding portion 74 is reduced. The bent portion 76 of 74 is less likely to be damaged (cracked).

FIG. 3 is an exploded view of a blank plate 81 used for manufacturing a paper container 80 with a zipper according to the prior art. 1 is a perspective view of a prior art zippered paper container 80. FIG. 1 is a plan view of a conventional zippered paper container 80. FIG. FIG. 11 is an enlarged cross-sectional view of a folded portion 876 of a conventional paper container with a zipper at a position where a zipper tape 861 is joined to a protruding portion 874 on the top surface of the paper container. (See FIG. 3 cross-sectional position AA). FIG. 4 is a cross-sectional view of one embodiment of laminated sheets 78, 88 of blank plates 10, 81; FIG. 4 is a cross-sectional view of another embodiment of laminated sheets 78, 88 of blank plates 10, 81; FIG. 4 is a cross-sectional view of another embodiment of laminated sheets 78, 88 of blank plates 10, 81; FIG. 4 is a cross-sectional view of another embodiment of laminated sheets 78, 88 of blank plates 10, 81; FIG. 4 is a developed view of the back shell blank plate 10a used for manufacturing the zippered paper container 90 of the first embodiment of the present disclosure. FIG. 4 is an exploded view of a front side blank plate 10b used for manufacturing the paper container 90 with a zipper according to the first embodiment of the present disclosure; FIG. 6B is a front view showing the shape of a paper container (flat state) 91 in an intermediate stage when the paper container 90 with zipper is manufactured using the blank plate 10 shown in FIGS. 6A and 6B. FIG. 6B is a perspective view showing the shape of a paper container (folded state) 92 in an intermediate stage when the paper container 90 with zipper is manufactured using the blank plate 10 shown in FIGS. 6A and 6B. FIG. 6B is a perspective view of a zippered paper container 90 produced using the blank plate 10 shown in FIGS. 6A and 6B. FIG. 10 is a side view of the zippered paper container 90 shown in FIG. 9; FIG. 10 is a plan view of the zippered paper container 90 shown in FIG. 9; Fig. 10 is a perspective view of the paper container 90 with a zipper shown in Fig. 9 with the top portion 71 opened; FIG. 10 is an enlarged cross-sectional view of the folded portion 76 at the joint position of the zipper tape 61 of the top side protruding portion 74 in the zipper-equipped paper container 90 shown in FIG. 9 ; (See FIG. 11 cross-sectional position BB). FIG. 4 is an enlarged cross-sectional view of one mode of a joint portion between the blank plate 10 and the zipper tape 61; (See FIG. 7 cross-sectional position CC). FIG. 10 is an enlarged cross-sectional view of another aspect of the joint portion between the blank plate 10 and the zipper tape 61; (See FIG. 7 cross-sectional position CC). Fig. 10 is a development view of the back shell blank plate 10a used for manufacturing the paper container 90 with a zipper according to the second embodiment of the present disclosure; FIG. 10 is a development view of a front side blank plate 10b used for manufacturing a zippered paper container 90 according to a second embodiment of the present disclosure; FIG. 10 is a development view of the back shell blank plate 10a used for manufacturing the zippered paper container 90 of the third embodiment of the present disclosure. FIG. 11 is a development view of a front side blank plate 10b used for manufacturing a zippered paper container 90 according to a third embodiment of the present disclosure;

The present disclosure will be described below with reference to the drawings. However, the present disclosure is not limited to these specifically shown forms or to the various specifically described structures.
In addition, in each drawing, the sizes and ratios of members may be changed or exaggerated for the sake of clarity. In addition, for the sake of clarity, parts that are not necessary for explanation or repeated symbols may be 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, not only have strict meanings but also include substantially the same states.

The blank plate 10 of the paper container 90 with a zipper of the present disclosure uses a laminated sheet 78 in which at least paper as a base material is laminated and at least the innermost layer is laminated with a thermoadhesive resin such as polyethylene, and has a rectangular outer shape. In addition, various forming plates necessary for forming the paper container 90 with a zipper are divided by various folding lines provided in the blank plate 10 .

<First embodiment>
<Blank plate>
The blank plate 10 of the zipper-equipped paper container 90 of this embodiment is shown in FIGS. 6A and 6B. FIG. 6A represents the back side blank plate 10a and FIG. 6B represents the front side blank plate 10b. The two sheets of the back side blank plate 10a and the front side blank plate 10b are collectively referred to as the blank plate 10. FIG.

In addition, unless otherwise specified, in each component of the blank plate 10 described later, the suffix a of each reference numeral indicates the element of the back side blank plate 10a, and the suffix b indicates the front side blank plate 10b. indicates an element of In elements with both suffixes a and b, non-suffixed symbols shall include both a and b.

The back shell upper edge 21a, which is the bottom shell of the back shell blank plate 10a in FIG.
The top edge 21b of the front side blank plate 10b in FIG.

In both FIGS. 6A and 6B, the front surface of the drawing is the outer surface when the paper container 90 with zipper is assembled, and the back surface is the inner surface.
6A and 6B are line symmetrical with respect to the upper edges 21a and 21b, respectively, except for some constituent elements (such as the top side projection bending line 15), which will be described later. When the inner surfaces of the side blank plate 10a and the front side blank plate 10b are aligned and placed on top of each other, the constituent elements (formation plates, lines, seal portions, zipper tape joining portions, etc., which will be described later) overlap.

The back side blank plate 10a and the front side blank plate 10b, which are aligned and superimposed, are joined together to produce an intermediate-stage zipper-equipped paper container (flat state) 91 as shown in FIG. An intermediate-stage zipper-equipped paper container (folded state) 92 as shown in FIG. 8 is manufactured, and the procedure proceeds toward the completion of the zipper-equipped paper container 90. This manufacturing method will be described later.

Unless otherwise specified, the top, bottom, left, and right of the front side blank plate 10b will be shown with reference to FIG. 6B. The back shell blank plate 10a will also be described with its upper edge 21a as the upper shell. Therefore, FIG. 6A is upside down.
In the paper container 90 with a zipper, the upper edge portion 21 is used as the upper side, and the lower edge portion 26 is used as the lower side.

The zippered paper container 90 thus formed is composed of a top portion 71, a body portion 72, and a bottom portion 73 in order from the top, as will be described later. The lower side is sometimes called the bottom side. (See Figure 9).
In addition, when describing the vertical direction of each component provided on the top portion 71, the description of the top side indicates the upper edge portion 21 side, and the vertical direction of each component provided on the bottom portion 73. In describing the bottom side, reference to the bottom side may also refer to the lower edge 26 side.

As described above, the back side blank plate 10a and the front side blank plate 10b are vertically symmetrical, so the description of the blank plate 10 will be made with respect to the front side blank plate 10b.
Further, the back side blank plate 10a and the front side blank plate 10b are the same in material (layer structure) and manufacturing method.

The outer blank plate 10b of the zipper-equipped paper container 90 of the present embodiment uses a laminated sheet 78 in which at least paper as a base material is laminated, and at least the innermost layer is laminated with a thermoadhesive resin such as polyethylene. It is formed in a substantially rectangular shape. Referring to FIG. 6B, the upper side is upper edge 21b, the left and right sides are front side edge 11b, and the lower side is lower edge 26b.
In addition, the front side blank plate 10b has a symmetrical shape with a vertical line passing through the central portion in the width direction as an axis of symmetry.
Note that the laminated sheet 78 will be described later.

On the front side blank plate 10b, from the front side upper edge portion 21b, the front side first lateral bending line 22b, the front side second lateral bending line 23b, and the front side third lateral bending line 22b, which are present in the transverse direction in order, are formed. A horizontal folding line 24b and a front side fourth horizontal folding line 25b are provided.
Preferably, the transverse fold lines 22b, 23b, 24b, 25b are respectively parallel to the upper edge 21b and the lower edge 26b of the face.

On the front side blank plate 10b, starting from the left, the front side first vertical folding line 12b, the front side second vertical folding line 13b, and the front side second vertical folding line 13b, which are present in the vertical direction, are sequentially formed. , and a front side first vertical folding line 12b is provided.
That is, the vertical folding line closer to the side edge portion 11b of each front side blank plate 10b is the front side first vertical folding line 12b, and the vertical folding line farther from the side edge portion 11b of the front side blank plate 10b. The bending line is the front side second longitudinal bending line 13b. It is desirable that each of the front side longitudinal fold lines 12b, 13b is substantially parallel to the side edge 11b of the front side blank plate 10b.

Each second vertical fold line 13b of the front side extends from the second horizontal fold line 23b to the lower edge 26b of the front side, but extends from the second horizontal fold line 23b to the lower edge 26b of the front side. It does not exist over the upper edge 21b.

The front side blank plate 10b is provided with a pair of top side protruding portion bending lines 15b on the left and right sides of the upper portion thereof.
The upper end of the top side projecting portion bending line 15b of the front side is the second vertical bending imaginary line 14b obtained by extending the second vertical bending line 13b of the front side toward the upper edge 21b of the front side. , at the same position as the third top intersection Jb of the front side, which is the intersection point with the upper edge 21b of the front side.
The lower end of the front side top side projecting part folding line 15b is the intersection of the front side second vertical folding line 13b and the front side second horizontal folding line 23b. It is at the same position as the intersection point Fb.

The front side top side protruding portion bending line 15b is a convex curved line toward the inner side in the width direction of the front side blank plate 10b. The top side projecting portion bending line 15 will be described later in detail.

Furthermore, a pair of oblique folding lines 17b for the top side of the front side and a diagonal bending line 18b for the bottom side of the front side are provided on the left and right sides, respectively, to form each part necessary for forming the paper container 90 with a zipper. The board is divided and configured.

The upper end of the front side top side oblique folding line 17b is the front side first top side folding line 12b and the front side first horizontal folding line 22b. It is at the same position as Eb.
The lower end of the top side oblique folding line 17b of the front side is the second top side intersection of the second top side of the front side, which is the intersection of the second vertical folding line 13b of the front side and the second horizontal folding line 23b of the front side. It is at the same position as Fb.

The upper end of the front side bottom diagonal folding line 18b is the front side second bottom intersection point Hb, which is the intersection of the front side second vertical folding line 13b and the front side third horizontal folding line 24b. in the same position.
The lower end of the front side bottom diagonal folding line 18b is the front side first bottom intersection point Gb, which is the intersection of the front side first vertical folding line 12b and the front side fourth horizontal folding line 25b. in the same position.

It should be noted that each of the front side oblique folding lines 17b described above may be located in the vicinity of each of the intersections Eb and Fb described above without being in contact with them. Further, the respective front side oblique fold lines 18b may be located in the vicinity of, but not in contact with, the respective intersections Gb, Hb.
By locating each of the oblique folding lines of the front side and each of the intersections near each other without touching each other, there is no excessive concentration of folding lines at a specific location while maintaining sufficient folding performance. , it is possible to prevent a decrease in the strength of the laminated sheet of the front side blank plate 10b.

Front side edge sealing margins 36b are formed on both left and right side edge portions 11b of the front side blank plate 10b via the front side first longitudinal bending line 12b.

In addition, on the lower edge portion 26b of the front side blank plate 10b, a bottom side seal margin 37b is formed through the fourth horizontal bending line 25b of the front side. there is

Forming plates of respective portions are sequentially provided on the front side blank plate 10b in the downward direction from the front side upper edge portion 21b located at the uppermost side.

Describing the main part, a front side upper overlapping plate 34b is provided on the lower side of the central region of the front side upper edge portion 21b. A front side top plate 33b is connected to the lower side of the front side upper overlapping plate 34b via a front side first horizontal folding line 22b. A front side wall plate 31b is connected to the lower side of the front side top plate 33b via a front side second lateral bending line 23b. A front bottom plate 35b is connected to the lower side of the front wall plate 31b via a third lateral bending line 24b.

In addition, the side plate 41b of the top of the top of the top of the top of the top of the top surface is connected to the outside of both the left and right sides of the upper overlapping plate 34b via the top of top of the top of the top of the top of the top of the top of the top surface. is set.

In addition, on the outside of both the left and right sides of the front side top plate 33b, a front side top side protruding portion allowance 38b is continuously provided via the front side top side protrusion bending line 15b. It is

In addition, on the outside of both the left and right sides of the front side wall plate 31b, the front side wall plate 32b is continuously provided via the front side second vertical bending line 13b.

In addition, on the outside of both the left and right sides of the bottom surface plate 35b, front side bottom side protruding portion margins 43b are continuously provided via the front side second vertical bending lines 13b.

In addition, a front side top side protruding portion allowance 38b is continuously provided to the lower side of the side plate 41b of each front side top portion via the front side first horizontal folding line 22b. . The front side plate 32b is connected to the lower side of the front side top side protruding portion allowance 38b via the front side second lateral bending line 23b. A front side bottom side protruding portion allowance 43b is continuously provided to the lower side of the front side plate 32b via a front side third lateral bending line 24b.

Bottom side seal margins 37b are continuously provided under the front side bottom plate 35b and the bottom sides of the front side bottom side projecting portion allowances 43b on both left and right sides thereof.

Left and right sides of the side plate 41b of the top side of the front side, the protrusion portion 38b of the top side of the front side, the side plate 32b of the front side, and the bottom side protrusion 43b of the front side A seal margin 36b on the side edge of the front side is continuously provided to the side through the first longitudinal bending line 12b of the front side.

The processing (ruling line processing) of the present embodiment for giving a folding line to the blank plate 10 is performed after the laminated sheet 78 is completed, and then the laminated sheet is supplied to a machine that manufactures the paper container 90 with a zipper. do. Alternatively, the creasing process may be performed by a machine that manufactures the paper container 90 with a zipper.

As the ruled line processing method, an appropriate method is adopted from known methods such as a platen method and a rotary die method.
Also, the laminated sheet 78 may be cut before the ruled lines are processed. Alternatively, the laminated sheet 78 may be supplied in roll form to the creasing process.

A punching process for punching the laminated sheet 78 to manufacture the blank plate 10 will also be described. For the punching process, an appropriate method is selected from known methods such as a platen method and a rotary die method. The blank plate 10 may be formed directly from the roll-shaped laminated sheet 78, or may be punched after being cut into sheets once.
Also, the order of creasing and punching does not matter. They may be processed at the same time.

In addition, the roll-shaped laminated sheet 78 slit to a predetermined roll width is supplied to a machine for manufacturing the paper container 90 with a zipper, and the rolled laminated sheet 78 is cut in the transverse direction to produce the blank plate 10. good too.

In addition, the back side blank plate 10a is a line except for the front side blank plate 10b and some constituent elements (such as when the top side protrusion bending line 15 is provided in a different shape on the front and back). They are symmetrical and have the same shape. In other words, it is a blank plate having substantially the same shape with the layer structure of the blank plate being reversed.

FIG. 7 is a front view showing the shape of a chuck-equipped paper container (flat state) 91 at an intermediate stage when the zipper-equipped paper container 90 is manufactured using the blank plate 10 shown in FIGS. 6A and 6B. The uppermost portion is the upper edge portion 21b of the front side blank plate 10b shown in FIG. 6B, and the back side thereof is provided with the back side blank plate 10a. Although the back side blank plate 10a cannot be visually observed, it has substantially the same shape as the front side blank plate 10b when seen through.

In FIG. 7, the back side blank plate 10a and the front side blank plate 10b are overlapped, and each component has the same positional relationship within the range of manufacturing variation when viewed through the drawing. The notation and subscripts of wa may be omitted in the explanation.

On the upper overlapping plate 34 and the side plate 41 of the top of the front side, an upper sealing portion 53 as a transverse direction sealing means and a zipper tape joint are provided at predetermined positions where the two blank plates described above overlap each other. The portions 52 are provided sequentially starting from the upper edge portion 21 .

The upper sealing portion 53 is provided at or in the vicinity of the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of each top portion.
If the upper seal portion 53 is substantially parallel to the upper edge portion 21, the length of the upper seal portion 53 can be shortened and the blank plate 10 is not wasted.

The upper seal portion 53 as a transverse sealing means is formed by joining an upper front seal portion 53b and an upper back seal portion 53a which face each other. Since the bonding is performed across the entire width of the upper edge 21 of the zipper-equipped paper container 90 or the vicinity of the upper edge 21 , the zipper-equipped paper container 90 is kept airtight.

Also, the upper seal portion 53 is preferably substantially parallel to the upper edge portion 21 . Furthermore, it is desirable that the zipper tape joint portion 52 is substantially parallel to the upper edge portion 21 .
In such a form, it becomes easy to open and close the zipper tape 61 and take out the contents. Also, the length of the zipper tape 61 can be shortened.

<Easy-to-open processing line>
The easy-to-open processing line 51 will be described.
The front side upper overlapping plate 34b and the side plate 41b of the front side top portion may be provided with a front side easy-open processing line 51b as an opening means.
By providing the easy-open processing line 51b, the paper container 90 with zipper can be opened without using tools such as scissors.

As shown in FIG. 7, the easy-to-open processing line 51 extends from one side edge 11 of the blank plate 10 to the other side edge 11, and is present between the upper seal portion 53 and the zipper tape 61. .

The notch 77 may be provided at either end of the easy-open processing line 51, and in this embodiment, the notch 77 is provided at the side edge 11 of the right side. The notch 77 may also be provided in the left side edge 11 . Alternatively, the notches 77 may be provided on both the left and right side edges 11 . The notch 77 facilitates initial opening.

By cutting the easy-to-open processing line 51 from one side edge (here, the right side) 11 and reaching the other side edge (here, the left side) 11, the upper overlapping plate 34 and the front side are cut. The side plate 41 of the top portion is cut across and the upper sealing portion 53 is also cut off, exposing the zipper tape 61 .

When using an intermittent half-cut line or a linear half-cut line for the easy-open processing line 51 of the unsealing means, it may be formed by a method using a normal blade, but a method using laser light irradiation, By using a method using ultrasonic waves, a method called diamond cutting, it is possible to form half-cut lines with superior precision and stability.

Moreover, the easy-open processing line 51 may be belt-shaped with a width. Moreover, multiple easy-to-open processing lines 51 may be provided. By providing a plurality of cut lines 51, it is possible to prevent deviation of cutting of the easy-open processing line 51.

The easy-open processing line 51b may not be provided depending on the material of the laminated sheet 78 of the front side blank plate 10b, the layer structure, the status of the easy-open processing, and the like. Even if there is no easy-open processing line 51b, it may be possible to open the package manually.

Furthermore, when the easy-open processing line 51b is not provided as described above, the package may be opened with a cutting tool such as scissors. In that case, the planned opening line may be displayed by printing. Moreover, the printing position may be printed at the position of the easy-open processing line 51b shown in FIG. 6B. Further, the planned opening line may not be clearly marked on the paper container 90 with a zipper, but may be described in an attached manual or the like.

<Chuck tape>
In the zipper tape 61, a male zipper tape 61m and a female zipper tape 61f are formed by extrusion molding, and a male zipper tape fitting portion 63m and a female zipper tape fitting portion 63f are fitted. are combined.

<Procedure for joining zipper tape>
The procedure for assembling the zipper-equipped paper container 90 will be described later, and among the procedures, the joining procedure for the zipper tape 61 will be described here.

In this case, the zipper tape joining portion 52 is a portion to be joined to the zipper tape 61 when assembling the paper container 90 with a zipper.

The back side blank plate 10a and the front side blank plate 10b are superimposed, and the side edge seal margins 36 and the upper seal portions 53 are heat-sealed.
At this time, the male zipper tape 61m and the female zipper tape 61f are fitted in advance at the male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f, respectively. inserted. At the same time, the outer surfaces of the two blank plates 10 are exposed, and the fastener tape joining portions 52 are heated and pressurized. Then, the blank plate 10 and the zipper tape 61 are heat-sealed. (See FIGS. 14A and 14B).

The joining of the zipper tape 61 to the blank plate 10 is not limited to the above-described heat sealing, and other methods such as an adhesive or an adhesive tape may be used.

By heat-sealing the zipper tape 61 by such a method, the position of the heat seal is reduced compared to the method of separately heat-sealing the male zipper tape 61m and the female zipper tape 61f to the zipper tape joint portion 52. Since the deviation is reduced and the mounting process is simplified, the zipper tape 61 can be mounted with good production efficiency.

<Lamination sheet of blank plate>
As described above, the laminated sheet 78 used for the blank plate 10 is formed by laminating at least the paper base layer 782 and laminating a thermoplastic resin such as polyethylene as at least the innermost thermoplastic resin layer 783. A barrier layer 785 for water vapor, oxygen, or other substances, a strength-enhancing layer, and the like can be provided on the intermediate layer, if necessary.

In addition, when a printed layer such as a pattern is provided on the zipper-equipped paper container 90 of the present embodiment, it is usually printed on the surface of the paper base layer 782. However, if the paper base layer 782 does not have good printability, For example, a biaxially stretched polyethylene terephthalate film or the like may be provided with a printed layer of a design or the like, and the film may be laminated on any one of the outer layers of the paper base layer 782 .

The paper base layer 782 is preferably made of paper that is rigid and does not easily crack when folded along a folding line or the like. It is possible to appropriately select and use a suitable one in consideration of water resistance (sizing degree) and the like.
As specific examples, woodfree paper, bleached kraft paper, base paper for cups, base paper for milk cartons, etc. can be preferably used, and the appropriate basis weight thereof is in the range of 80 to 320 g/m ² .

As the resin for the innermost layer, and optionally the outermost layer, and the heat-adhesive resin layer (sealant layer) of the intermediate layer, low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene/α-olefin copolymer polymerized using a single-site catalyst, ethylene/vinyl acetate copolymer (EVA), ethylene/acrylic acid copolymer (EAA), Random copolymer of ethylene/methacrylic acid (EMAA), ethylene/methyl acrylate copolymer (EMA), ethylene/ethyl acrylate copolymer (EEA), ionomer, polypropylene and its copolymer, polyester A resin or the like can be used, and a suitable one can be appropriately selected and used from among these depending on the content to be filled and the conditions of storage and use.

Among the above thermoadhesive resins, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) in particular have thermal stability during processing such as extrusion coating, It has excellent adhesion to materials, low-temperature heat sealability, etc., and is also excellent in thin film formation, so the outermost thermoadhesive resin layer, which does not require much thickness, can be formed with a relatively thick film such as 6 to 10 μm. It is also easy to laminate by extrusion coating with a thin thickness, and at the same time it is possible to reduce the use ratio of plastic materials, and at the same time, it is possible to obtain merits in terms of cost.

The innermost layer and, if necessary, the outermost heat-adhesive resin layer were subjected to easy adhesion treatment such as anchor coating, corona treatment, flame (flame) treatment, etc. After that, the resin can be extrusion-coated and laminated on it, or the thermoadhesive resin can be formed into a film in advance, and the film can be laminated by a known dry lamination or extrusion lamination (sandwich lamination). Can be stacked.

When the barrier layer 785 is laminated on the intermediate layer of the laminated sheet 78, the barrier layer 785 may be a metal foil such as aluminum foil, a metal such as aluminum, silica, alumina, or an inorganic oxide biaxially stretched polyethylene terephthalate film ( hereinafter, PET film), biaxially oriented nylon film (hereinafter, ON film), biaxially oriented polypropylene film (hereinafter, OPP film), etc., and a vapor deposited film deposited to a thickness of 20 to 100 nm. can be done. Alternatively, saponified ethylene-vinyl acetate copolymer film (hereinafter referred to as EVOH film), biaxially oriented nylon MXD6 film, polyacrylonitrile film, and PET film, ON film, and OPP provided with a coating layer of polyvinylidene chloride A film or the like can be used.

Such a barrier layer 785 is preferably laminated on the inner side of the paper base layer 782 in order to effectively utilize its barrier properties. When a metal-deposited film is used, it can be laminated on the outer surface of the paper base material layer 782 in order to utilize the metallic feeling in the design. Lamination of the barrier layer 785 can be easily performed by known dry lamination, extrusion lamination (sandwich lamination), or the like.

The layer structure of the laminated sheet 78 of the blank plate 10 of the zipper-equipped paper container 90 of the present embodiment is illustrated. Cross-sectional views of laminate sheet 78 are shown in FIGS. 5A, 5B, 5C, and 5D.
5A, 5B, 5C, and 5D are also used to describe the laminated sheet 88 of the blank plate 81 of the prior art, but are also used for the laminated sheet 78 of the blank plate 10 of the present disclosure, and the reference numerals are It is written together.

FIG. 5A is a cross-sectional view of the laminated sheet 78 of the blank plate 10 consisting of three layers, the layer structure of which is as follows.
(Surface) Outermost Thermoplastic Resin Layer 781 / Paper Base Layer 782 /
Innermost thermoplastic resin layer 783 (back side)

FIG. 5B is a cross-sectional view of the laminated sheet 78 of the blank plate 10 consisting of two layers, the layer structure of which is as follows.
(Front side) Paper base layer 782 / Innermost thermoplastic resin layer 783 (Back side)
This is a layer configuration in which the outermost thermoplastic resin layer 781 is removed from the three-layer blank plate 10 shown in FIG. 5A.

In addition, a barrier layer 785 can be provided when the blank plate 10 is required to have barrier properties (water vapor, oxygen, aroma retention, etc.). FIG. 5C is a cross-sectional view of the laminated sheet 78 of the blank plate 10 consisting of five layers, the layer structure of which is as follows.
(Front Side) Outermost Thermoplastic Resin Layer 781/Paper Base Layer 782/Intermediate Adhesive Layer 784/Barrier Layer 785/Innermost Thermoplastic Resin Layer 783 (Back Side)

FIG. 5D is a cross-sectional view of a laminated sheet 78 of the blank plate 10 consisting of four layers, the layer structure of which is as follows.
(Surface Side) Paper Base Layer 782 / Intermediate Adhesive Layer 784 / Barrier Layer 785 /
Innermost thermoplastic resin layer 783 (back side)
This is a layer configuration in which the outermost thermoplastic resin layer 781 is removed from the blank plate 10 composed of five layers shown in FIG. 5C.

The bonding between the layers of each laminated sheet 78 is performed by known dry lamination, extrusion coating, adhesives, or the like. Note that layers for bonding between layers are not shown because they are thin.

<Production of paper container with zipper>
Next, from the blank plate 10 of the paper container 90 with a zipper, an intermediate paper container with a zipper (flat state) 91 is produced, and an intermediate paper container with a zipper (folding state) 92 is produced. An outline of the procedure until the package of the zippered paper container 90 filled with items is completed will be described.

<Production of paper container with zipper (flat state) at intermediate stage>
When the two blank plates 10 are overlapped, the zipper tape 61 having the male zipper tape 61m and the female zipper tape 61f pre-fitted is inserted in the position where the zipper tape joints 52 overlap each other. Then, the outer surfaces of the two blank plates 10 are exposed, and the zipper tape joining portions 52 are heated and pressed to be heat-sealed.

Next, the inner surfaces of the upper seal portions 53 are heat-sealed together, and the inner surfaces of the side edge seal margins 36 adjacent to the side edge portions 11 of the blank plate 10 are heat-sealed together. Then, the paper container with zipper (flat state) 91 in the intermediate stage is formed into a bag shape with the lower edge portion 26 being open.

Also, notches 77 may be provided at each end of the easy-open processing line 51 (where they come into contact with the side edges of both sides). Note that the notch 77 may be provided at either one end.

The zippered paper container 90 is not particularly limited in actual manufacturing, but in order to improve productivity, it is a device that performs in-line assembly of the paper container, filling of the contents, and sealing of each joint. may be used.

In that device, a long printed laminated sheet 78 rolled up in a roll is fed out, and the folding line is processed, the chuck tape 61 is inserted and heat-sealed, and the side edge is Heat sealing of the side sealing margin 36, heat sealing of the upper sealing portion 53, punching of the notch 77, and the like may be performed.

It should be noted that the order of the steps may be changed as long as the desired chuck-equipped paper container 90 can be obtained.

Incidentally, FIGS. 14A and 14B show enlarged cross-sectional views of the joining portion of the zipper tape 61, which is the portion where the zipper tape 61 and the blank plate 10 are joined, in the zipper-equipped paper container (flat state) 91 in the intermediate stage. The cut point is shown at the cross-sectional position CC in FIG. Here, the blank plate 10 is exemplified by the four layer laminate sheet 78 of FIG. 5D.

In FIG. 14A, a female zipper tape 61f is joined to the front side blank plate 10b as the front side zipper tape 61b. The female zipper tape 61f includes a female zipper tape body portion 62f that is joined to the blank plate 10, and a female zipper tape fitting portion 63f that has a concave portion that fits with the male zipper tape 61m.
A male zipper tape 61m is joined to the back blank plate 10a as a back zipper tape 61a. The male zipper tape 61m includes a male zipper tape body portion 62m that is joined to the blank plate 10, and a male zipper tape fitting portion 63m that has a convex portion that fits with the female zipper tape 61f.

In FIG. 14B, a male zipper tape 61m is joined to the front side blank plate 10b as the front side zipper tape 61b. The male zipper tape 61m includes a male zipper tape body portion 62m that is joined to the blank plate 10, and a male zipper tape fitting portion 63m that has a convex portion that fits with the female zipper tape 61f.
A female zipper tape 61f is joined to the back blank plate 10a as a back zipper tape 61a. The female zipper tape 61f includes a female zipper tape body portion 62f that is joined to the blank plate 10, and a female zipper tape fitting portion 63f that has a concave portion that fits with the male zipper tape 61m.

It should be noted that whether the male zipper tape 61m or the female zipper tape 61f is joined to the front side blank plate 10b depends on the required performance of the paper container 90 with a zipper and the characteristics of the paper container 90 with a zipper. It is appropriately selected depending on the specifications of the manufacturing equipment.

The zipper tape fitting portion 63 of the zipper tape 61 is particularly thick, and the blank plate 10 is positioned at the zipper tape fitting portion 63 when the bent portion 76 of the top side protrusion 74 is bent. Damage (cracks) is likely to occur.

<Production of paper container with zipper (folded state) at intermediate stage>
A mandrel is inserted from the opening of the bottom 73 of the paper container with zipper (flat state) 91 at this intermediate stage, leaving the upper overlapping plate 34, and the top plate 33 on the lower side thereof is first horizontally folded. Widened back and forth by the line 22, the upper lapping plate 34 is erected upward.

Here, in order to reliably perform the bending process of the ridge portion 72d of the body portion 72, the inner side and/or the outside of the body portion 72 are known, and an auxiliary member is brought into contact with the vicinity (including contact) of the ridge portion 72d. You may let

A top portion 71 formed by the top plate 33 and a body portion 72 are continued to the lower part of the upper overlapping plate 34, and an intermediate-stage paper container with a zipper (folding state) 92 is formed in which the bottom portion 73 opens in a substantially rectangular shape. be done. At this stage, as shown in FIG. 8, the upper overlapping plate 34 stands upward.

In the design, the shape of the horizontal cross section of the body portion 72 and the shape of the opening of the bottom portion 73 are assumed to be rectangular. Therefore, it is assumed to be substantially rectangular, including cases where the shape is not perfectly rectangular.

<Forming and filling paper containers with zippers>
Next, the upper stacking plate 34 standing upward is folded to the rear side (back side top plate 33a side) and laid down, and the top side protruding portion 74 protruding to both the left and right sides. is bent toward the side plate 32 and joined to the trunk portion 72 .
At this time, the bent portion 76 of the top side projecting portion 74 is bent. An auxiliary member may be brought into contact with the vicinity (including abutment) of the top side protrusion bending line 15 from the side and/or the outside.

The method of joining the top side projecting portion 74 to the trunk portion 72 includes a method of using an adhesive (hot melt, etc.), a method of using an adhesive tape, and a method of mechanically joining (engagement, joining, etc.). equipment), etc. may be used. Moreover, when the outermost layer of the blank plate 10 is provided with a thermoplastic resin layer (sealant layer), there is a method of heat-sealing the thermoplastic resin layer.
A similar method is used for joining the bottom side protrusion 75, which will be described later.

In addition, the tip portion of the top side projection portion 74 may be joined to the body portion 72 of the paper container 90 with a zipper.
In addition, a portion other than the leading end of the top side projecting portion 74 may be joined to the body portion 72 of the paper container 90 with a zipper. In that case, the tip of the top side projecting portion 74 does not have to be joined to the body portion 72 of the zipper-equipped paper container 90 .

The bottom part 73 of the paper container with zipper in the intermediate stage (folded state) 92 formed as described above is directed upward, the contents are filled from the open bottom part 73, and then the bottom part 73 is folded, The bottom side seal margins 37 are heat-sealed in a palm-to-palm seal manner.

After that, the joined bottom side seal allowance 37 is folded and laid on the back side (back side bottom plate 35a side), and the bottom side protruding portions 75 protruding on both the left and right sides are formed on the bottom plate. 35 is folded and joined to complete a package of a paper container 90 with a zipper in a substantially rectangular parallelepiped shape.

FIG. 9 is a perspective view showing a zippered paper container 90 of this embodiment. FIG. 10 is a side view of the zippered paper container 90 shown in FIG. FIG. 11 is a plan view of the zippered paper container 90 shown in FIG.

The zippered paper container 90 shown in FIG. 9 has a substantially rectangular parallelepiped outer shape, and has a ridge 72d of the body 72 thereof.
In addition, since the folded portion 76 of the top side protruding portion 74 is greatly curved and the zippered paper container 90 is made of a flexible laminated sheet 78 mainly composed of paper, it does not have a perfect rectangular parallelepiped shape. Therefore, it has a substantially rectangular parallelepiped shape.

Here, the folded portion 76 of the top side protrusion 74 and the top side protrusion bending line 15 in the molded paper container 90 with a zipper according to the present embodiment will be described.
9, 10, and 11, the folded portion 76 of the top side protruding portion 74 of the zipper-equipped paper container 90 has a convex top portion in the width direction of the zipper-equipped paper container 90. Referring to FIG. There is a ribbed fold line 15 and no other fold lines.

<Bending line of the protruding portion of the top side>
The top side protrusion bending line 15, which is bent when the top side protrusion 74 is folded downward and joined to the body 72 of the zipper-equipped paper container, has one end facing the second side. It is positioned at or near the top intersection F, and the other end is positioned at or near the third top intersection J.

Also, the top side projecting portion bending line 15 may be a smooth curve in which the inner side of the blank plate 10 in the width direction is convex. Here, a smooth curve is a curve that does not have corners and is not convex on the outer side in the width direction of the blank plate 10 . Since it does not have corners, it is less likely that unexpected folding (wrinkles, etc.) starting from the corners will occur. In addition, since it is convex in only one direction, it is difficult for a small curvature to occur, and it is easy to bend a curve.

Further, a fourth top intersection point K is defined as an intersection point between the top side protruding portion bending line 15 and the second horizontal bending line 23 . The fourth top intersection point K may be the innermost position in the width direction of the paper container 90 with a zipper on the top side folding line 15 . By doing so, the first horizontal folding line 22 is connected to the inward apex (the innermost position) of the top side protrusion folding line 15, so that the two folding lines can be smoothly folded. is.

Also, the top side protrusion bending line 15 may be a single arc. Since it is a single arc, it has no corners. In addition, it is easy to design and process the curve of the top side projecting portion bending line 15 .

Here, the intersection point between the top side protruding portion bending line 15 and the second horizontal bending line 22 is defined as a fourth top intersection point K. As shown in FIG. Further, the intersection point between the second vertical bending imaginary line 14 and the second horizontal bending line is defined as the fifth top intersection point L. (See FIG. 7).
The distance between the fourth top section intersection point K and the fifth top section intersection point L is defined as a top side protruding portion bending line vertex distance X.

The top side projecting portion bending line vertex distance X is an index indicating the degree of curvature of the top side projecting portion bending line 15 .
It is desirable that the distance X between the vertexes of the bending line of the protruding part of the top part in the present embodiment is 3 mm or more and 25 mm or less.

When the top side protruding portion bending line vertex distance X is less than 3 mm, there is no significant difference compared to the straight second vertical bending imaginary line, and the curvature of the bent portion 76 of the top side protruding portion 74 is small. As a result, the bent portion 76 of the top side protrusion 74 is likely to be damaged (cracked).
If the top side protrusion bending line apex distance X exceeds 30 mm, the top side protrusion 74 separates from the bent portion 76, and thus cannot contribute to the bending of the top side protrusion 74. . As a result, the curvature of the bent portion 76 of the top side protrusion 74 becomes small, and damage (cracking) is likely to occur in the bent portion 76 of the top side side protrusion 74 .

In this embodiment, the straight second vertical bending imaginary line 14 does not exist. Therefore, the top side protrusion 74 is bent along the top side protrusion bending line 15, and as shown in FIG.

In particular, the laminated sheet 78 where the zipper tape 61 is joined is particularly thick, and since stress (pulling force) is applied to the outer side of the bent portion 76 of the top side protruding portion 74, damage (cracking) is likely to occur. However, in the zipper-equipped paper container of the present embodiment, damage (cracking) does not occur in the bent portion 76 of the top side projecting portion 74, so that the external appearance does not deteriorate.

Further, in the present embodiment, the top side protrusion bending line 15 is provided only on the front side blank plate 10b. This is because damage (cracking) of the bent portion 76 of the top side protrusion 74 occurs in the outer side, so that the outer side of the bent portion 76 of the top side side protrusion 74 is bent (curved) more frequently. In order to do so, it is highly effective if the front side top side protruding portion bending line 15 is present in the front side blank plate 10b.

Further, two or more of the top side projection bending lines 15 may be provided in parallel. The ends of the top side projection fold lines 15 may be coincident or adjacent, and may be spaced apart from the ends.

When the top side projecting portion 74 is folded to be joined to the body portion 72, the top side projecting portion bending line 15 is folded in a mountain fold. Since the top side protrusion folding line 15 is positioned inward of the second vertical folding imaginary line 14 , the folded portion 76 of the top side protrusion 74 is within the width of the paper container 90 with a zipper. When the inside of the direction is known, bending begins, and the top ridge protruding portion 74 continues to be greatly curved. FIG. 13 shows an enlarged cross-sectional view of the folded portion 76 of the top side protruding portion 74 of the zipper-equipped paper container 90 of the present embodiment. The cross-sectional position is the cross-sectional position BB in FIG.

Since the bent portion 76 of the top side projecting portion 74 does not have a portion with a small curvature, the amount (length) by which the outer surface of the bent portion 76 of the top side projecting portion 74 is stretched is Since the bent portion 76 of the protruding portion 74 is not curved but bent at an angle (when the radius of curvature is extremely small), the bent portion 76 is less likely to be damaged (cracked).

<Opening operation for taking out a paper container with a zipper>
FIG. 12 shows a state in which the top portion 71 of the package body of the completed paper container 90 with a zipper is opened to take out the contents.

The easy-to-open processing line 51 is opened manually from a notch 77 provided in one side (here, the right side) of the side edge 11, and the other side (here, the left side) is opened. The cut is made up to the edge 11 .

Next, the front side opening gripping margin 57b between the front side easy-open processing line 51b and the front side zipper tape 61b and the back side between the back side easy-open processing line 51a and the back side zipper tape 61a are The chuck tape 61 exposed at the easy-to-open processing line 51 is opened by grasping the unsealing gripping margins 57a and spreading them in the outer side direction of the paper container 90 with a zipper.

When the zipper tape 61 is opened, the end of the side edge 11 of each blank plate 10 of the zipper tape 61 is opened over substantially the entire width up to the seal allowance 36. .
As described above, the removal opening 56 is formed by separating the male zipper tape 61m and the female zipper tape 61f of the zipper tape 61. As shown in FIG.

<Second embodiment>
The blank plate 10 of this embodiment is shown in FIGS. 15A and 15B.
Compared with the blank plate 10 of the first embodiment (see FIGS. 6A and 6B), the blank plate 10 of the present embodiment is different from the blank plate 10 of the back side blank plate 10a in that the bending line 15a of the back top portion protrusion portion of the back side blank plate 10a is larger than that of the blank plate 10 of the first embodiment. has been removed. Other configurations such as the shape of the blank plate 10 and the layer structure of the laminated sheet 78 are the same as in the first embodiment.

In the blank plate 10 of the present embodiment, only the front side blank plate 10b, which is more likely to be damaged (cracked) in the bent portion 76 of the top side protrusion 74 than the back side blank plate 10a, has a front side. A top side protruding portion bending line 15b is provided. By doing so, damage (cracking) of the bent portion 76 of the top side projection portion 74 may be prevented. Furthermore, since the back side top side protruding portion bending line 15a is eliminated, the structure of the stamping die and the like used for the crease line processing is simplified.

<Third Embodiment>
The blank plate 10 of this embodiment is shown in FIGS. 16A and 16B.
The blank plate 10 of the present embodiment differs from the blank plate 10 of the first embodiment (see FIGS. 6A and 6B) in the shape of the top side protrusion bending line 15 .
The projecting portion bending line 15 of the present embodiment has a shape obtained by cutting an approximately ellipse along its major axis. Other configurations such as the shape of the blank plate 10 and the layer structure of the laminated sheet 78 are the same as in the first embodiment.

The top side protrusion bending line 15 of the present embodiment is an example of a curved line that is not an arc. In particular, since the bending line 15 of the protruding portion of the front side is located at a conspicuous place in appearance, various curves can be selected from the viewpoint of design within a range that does not impair the functionality. Furthermore, it may be a combination of straight lines and curved lines.

In addition, the back side top side protruding part bending line 15a may be deleted, but both the front side top side protruding part bending line 15b and the back side top side protruding part bending line 15a is provided, it is possible to more effectively prevent damage (cracking) of the bent portion 76 of the top side projection portion 74 .

In addition, the shape of the front side top side protruding portion bending line 15b and the back side top side protruding portion bending line 15a may be different.

In addition, the top side projecting portion bending line 15 may exist only on either the left or right side. In that case, for example, the bent portion 76 of the other top side protrusion 74 where the top side protrusion bending line 15 does not exist may be shaped so as not to be bent.
Moreover, even if the bent portion 76 of the other top side protrusion 74 is bent and the bent portion 76 of the top side protrusion 74 is damaged (cracked), it may be allowed.

EXAMPLES The embodiments of the present disclosure will be more specifically described below with reference to examples.

<Example 1>
In Example 1, using the blank plate 10 of FIGS. 6A and 6B corresponding to the first embodiment, a zipper-equipped paper container 90 having the configuration shown in FIG. 9 was produced.

The two blank plates 10 of FIGS. 6A and 6B are prepared, and their inner surfaces are aligned and overlapped, and as shown in FIG. It was heat-sealed, and the upper seal portion 53 was also heat-sealed. At the same time, the zipper tape 61 was also heat-sealed. In this way, an intermediate-stage paper container with a zipper (flat state) 91 in which the bottom seal margin 37 was not sealed was produced.

The laminated sheet 78 of the blank plate 10 has the following structure.
(outer side)
Printed layer such as pattern (gravure printing) /
Paper base layer 782 (Nippon Paper Industries, base paper for liquid paper containers 150 g/m ² ) /
Intermediate adhesive layer 784 (EMAA 20 μm Mitsui Dow Polychemical N0908N) /
Barrier layer 785 (silica deposition PET 12 μm Dai Nippon Printing IB-PET-UBP) /
Innermost thermoplastic resin layer 783 (LDPE 40 μm Japan polyethylene LC520)
(inner side)

A method for manufacturing the laminated sheet 78 will be described.

First, a roll-shaped paper base material layer 782 was unwound, and predetermined patterns and characters were gravure-printed at predetermined positions, and then rolled up again.

In the next step, the roll-shaped paper base layer 782 described above is unwound, and the inner surface of the paper base layer 782 is covered with a barrier layer 785 (silica-deposited PET 12 μm) and a molten intermediate adhesive layer 784 (EMAA 20 μm) were interposed by extrusion lamination (sandwich lamination).

Next, an innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed on the opposite side (inner side) of the paper base layer 782 of the barrier layer 785 by extrusion lamination.

In addition, anchor coat treatment, corona treatment, flame treatment (flame treatment), or the like may be performed between each bonding layer as necessary to improve bonding strength. Alternatively, the melted resin may be subjected to an ozone treatment or the like.

Next, the laminated sheet 78 was subjected to ruled line processing, punching processing, and the like, and the blank plate 10 was completed.

Both the male zipper tape 61m and the female zipper tape 61f are heat-sealed on the zipper tapes 61 that are heat-sealed and attached to the inner surfaces of the top overlapping plate 34 and the top side plate 41 of the paper container 90 with zipper. The zipper tape body portion 62 has a two-layer structure.
The zipper tape 61 has a resin layer formed of LLDPE on the side heat-sealed to the paper container 90 with a zipper, and a resin layer on the opposite side formed of MDPE. The fitting portions of 63m and the female zipper tape fitting portion 63f are both made of LLDPE, and the width of the zipper tape body portion 62 is 10 mm.

The dimensions of the back side blank plate 10a and the front side blank plate 10b are rectangular with a length of 220 mm and a width of 169 mm. A side edge seal allowance 36 was provided.
In addition, the lower edges 26 of the lower sides were each provided with a bottom side seal allowance 37 having a width of 10 mm.
In addition, in the vicinity of the upper edge portions 21 of the upper overlap plate 34 and the side plate 41 of the top portion, a seal margin of the upper seal portion 53 having a width of 3 mm was provided.

The blank plate 10 includes an upper overlapping plate 34, a first horizontal bending line 22, a top plate 33, a second horizontal bending line 23, a wall surface plate 31, and a third horizontal bending in order from the upper edge 21 toward the lower side. A line 24 and a bottom plate 35 were provided in this order.

The top side protrusion bending line 15 was provided on both the front side blank plate 10b and the back side blank plate 10a.
Each blank plate 10 was provided with two top side projection bending lines 15 . The two locations are positions connecting the second top intersection F and the third top intersection J, and were present in pairs on the left and right.

Further, the top side protrusion bending line 15 was a single arc, and the top side protrusion bending line distance X was 18 mm.

In addition, side plates 41 of the top portion are provided on the outside of both flanks of the upper overlapping plate 34 with the top side projecting portion bending line 15 interposed therebetween.

In addition, on the outside of both flanks of the top plate 33, a top side protrusion allowance 38 is provided via the top side protrusion bending line 15. As shown in FIG.

In addition, side plates 32 were provided on the outside of both sides of the wall plate 31 via the second vertical bending line 13 .

In addition, a bottom side protruding portion allowance 43 is provided on the outside of both sides of the bottom plate 35 via the second vertical bending line 13 .

Then, when the inner surfaces of the two blank plates 10 are aligned and superimposed on the upper overlapping plate 34 and the side plate 41 of the top portion, the upper edge portion 21 that becomes the upper edge when superimposed is 10 mm below the upper edge portion 21 . 7, an easy-open processing line 51 as a means for opening the container is provided in the transverse direction of the top portion 71 of the paper container 90 with a zipper, together with the printing of the paper base material layer 782 of the laminated sheet 78. . The easy-open processing lines 51 are provided as perforation lines.

Under the easy-to-open processing line 51, a zipper tape 61 is placed on the inner surface of the upper overlapping plate 34 and the side plate 41 of the top part with a gap of 5 mm, and crosses the top part 71 of the paper container 90 with a zipper. oriented to be heat sealed.

In addition, after joining the two blank plates 10 and heat-sealing the zipper tape 61, heat-sealing the side edge seal margin 36, and heat-sealing the upper seal portion 53 by the above-described method, the two blank plates 10 are easily overlapped. A notch 77 was provided in the side edge portion 11 of the right side of the opening process line 51, and an intermediate-stage paper container with a zipper (flat state) 91 in which the bottom side seal margin 37 was not sealed was produced. (See FIG. 7).

Next, this intermediate-stage paper container with zipper (flat state) 91 has a mandrel inserted through the opening of the unsealed bottom side seal allowance 37, leaving the upper overlapping plate 34, and the bottom thereof is The top plate 33 of the top plate was spread forward and backward along the first horizontal folding line 22, and the upper overlapping plate 34 was erected upward.
Under the upper stacking plate 34, a top portion 71 formed by the top plate 33 and a body portion 72 are continued to form an intermediate-stage zippered paper container (folded state) 92 in which the bottom portion 73 opens in a substantially rectangular shape. . (See Figure 8).

Then, the superimposed upper overlapping plate 34 is bent to the back surface plate 33a. Thereafter, the top side projecting portions 74 continuously provided on both left and right sides of the top portion 71 were joined to the body portion 72 .
In addition, the tip of the top side protruding part 74 is folded in the inner side direction of the paper container 90 with a zipper (downward before folding the top side protruding part 74), and the top side protruding part 74 and body part 72 are made easy to join.

The completed substantially rectangular parallelepiped paper container was formed to have a width of 95 mm, a height of 120 mm, and a depth of 60 mm.
A zippered paper container 90 was produced as described above.

<Example 2>
In this example, a zippered paper container 90 was produced using the blank plate 10 shown in FIGS. 15A and 15B, which corresponds to the second embodiment. The front side blank plate 10b of this embodiment has the same shape as that of the first embodiment. The back shell blank plate 10a of this embodiment has the same shape as that of the first embodiment, except that it does not have a top side protrusion bending line. The other layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, and the like were the same as those of the first embodiment.

<Example 3>
In this example, a zippered paper container 90 was produced using the blank plate 10 shown in FIGS. 16A and 16B, which corresponds to the third embodiment. The blank plate 10 of this example had the same shape as that of Example 1 except for the shape of the top side projection bending line 15 . The other layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, and the like were the same as those of the first embodiment.

<Comparative example>
In a comparative example, one sheet of blank plate 81 as shown in FIG. 1 was used to fabricate the paper container 80 with a zipper shown in FIG.

In addition, in the blank plate 81 of the comparative example, there is no curve-shaped top side projecting portion bending line. Instead, the second longitudinal fold line 812 ran straight from one bottom edge, through the intermediate lateral fold line 851, to the other bottom edge.
The upper stacking plate 834 and the side plate 843 of the top are folded to form the back side top plate 833a, and the top side protruding from the left and right ends of the top portion 871 of the paper container 80 with a zipper is formed. When the projecting portion 874 is joined to the body portion 872 of the paper container, the angle formed by the top portion 871 and the top side projecting portion 874 via the bent portion 876 of the top side projecting portion 874 is approximately Right angle.
Other shapes, materials, processing methods, etc. were the same as in the first embodiment.

<Evaluation>
100 samples for each of Examples 1 to 3 and Comparative Example were produced.

In addition, when manufacturing the paper container 80 with a chuck of the comparative example, there was a step of folding the blank plate 81 along the middle horizontal folding line (half-folding line) 821 . (See Figure 1). In the process, an event was observed in which the adjacent easy-to-open processing lines (perforation lines) 851 were erroneously bent. If the easy-open processing line (perforation line) 851, which should not be bent originally, is bent, the blank plate 81 becomes a defective product, resulting in loss.

This is because the easy-open processing line 851 has many cut portions (including half-cuts) in order to ensure easy-openability, and is easily bent unintentionally.
The ease of folding the easy-open processing lines (perforation lines) 851 is often about the same as the ease of folding the intermediate horizontal folding lines (half-folding lines) 821, and when the paper container 80 with a zipper is manufactured, , the intermediate horizontal folding line (half-folding line) 821 is carefully folded, but the adjacent easy-to-open processing line (perforation line) 851 may be accidentally folded.

In addition, if the intermediate horizontal folding line (half-folding line) 821 is to be folded more carefully, the time required to manufacture the paper container 80 with a zipper increases. As a result, the ability to manufacture the zippered paper container 80 may decrease.

On the other hand, in the paper container 90 with a zipper of the present disclosure, in which the paper container 90 with a zipper is manufactured by joining two blank plates 10a and 10b, there is no intermediate horizontal folding line. Since there is no process, the defect of bending the easy-open processing line (perforation line) 851 by mistake as described above does not occur.
Therefore, in the zippered paper container 90 of the present disclosure, the production capacity is not lowered, and the occurrence of defects can be reduced.

In the comparative example, a damage (crack) 879 occurred in the laminated sheet 88 at the folded portion 876 of the top side projecting portion 874 of the zipper-equipped paper container 80 .

In Examples 1 to 3, the laminated sheet 78 at the folded portion 76 of the top side projecting portion 74 of the paper container 90 with zipper did not deteriorate in appearance due to damage (cracking) or the like.
This is because the top side protrusion bending line 15 provided in the bent portion 76 of the top side protrusion 74 is appropriately bent, so that the bent portion 76 of the top side protrusion 74 has a large curvature. This is because the aesthetic appearance of the outer appearance is maintained because of the curvature. This is because the stress generated when the top side protrusion 74 is bent is reduced. Also, the outer layer (in this embodiment, the paper base layer 782) from the zipper tape 61 of the front side blank plate 10b at the position of the bent portion 76 of the top side protrusion 74. This was because there was little extension.

Snacks are filled from the bottom 73 into the paper containers 92 with zippers (upright state) in the intermediate stage of Examples 1 to 3 produced as described above. The seal margins 37 are heat-sealed, and the heat-sealed portion is laid down in the direction of the back bottom plate 35a.

Further, the bottom side projecting portions 75 protruding from the left and right sides of the bottom portion 73 are bent to the side of the bottom plate 35, and heat-sealed to the front side bottom plate 35b and/or the front side bottom side seal margin 37b. , a package of the substantially rectangular parallelepiped zippered paper container 90 of Examples 1 to 3 was produced.

In addition, the packages of paper containers with zippers 90 of Examples 1 to 3 manufactured as described above were tested for unsealability, suitability for taking out the contents, and resealability with a zipper.

As a result, both the notch 77 provided as an initial unsealing means in the side plate 41 of the top and the easy-to-open processing line 51 provided in the upper overlapping plate 34 and the side plate 41 of the top allow easy opening. It was possible to cut off the upper part of the easy-open processing line 51 and open it.

Next, the front side opening gripping margin 57b between the front side easy-open processing line 51b and the front side zipper tape 61b and the back side between the back side easy-open processing line 51a and the back side zipper tape 61a are The unsealing gripping margin 57a was gripped by human hands, and spread in the outer side direction of the paper container 90 with a zipper.

As a result, the fitting of the zipper tape 61 exposed at the easy-open processing line 51 is easily released, and the upper portion of the paper container 90 with a zipper is opened over substantially the entire width, forming an opening 56 for removal. rice field. The snacks filled inside could be easily taken out through the take-out opening 56 .

Moreover, after part of the content was taken out, the zipper tape 61 was easily refitted and resealed in the packages of the zippered paper containers 90 of Examples 1 to 3. FIG. The remaining contents were then properly preserved.

Furthermore, the chuck-equipped paper container 90 of the present disclosure has a paper mass ratio of about 60% by mass with respect to the overall mass of the zipper-equipped paper container 90, which sufficiently satisfies the standard of 51% by mass or more for a paper container. Met.

10 Blank plate 10a Back side blank plate 10b Front side blank plate 11 Side edge 12 First vertical folding line 13 Second vertical folding line 14 Second vertical folding virtual line 15 Top side projection folding line 17 Top Side diagonal fold line 18 Bottom side diagonal fold line 21 Upper edge 22 First horizontal fold line 23 Second horizontal fold line 24 Third horizontal fold line 25 Fourth horizontal fold line 26 Lower edge 31 Wall plate 32 Side plate 33 Top plate 34 Upper overlapping plate 35 Bottom plate 36 Side edge seal allowance 37 Bottom seal allowance 38 Top side protrusion allowance 41 Top side plate 43 Bottom side protrusion allowance 51 Easy opening Processing line 52 Zipper tape joining portion 53 Upper seal portion 56 Extraction opening 57 Unsealing gripping margin 61 Zipper tape 61m Male zipper tape 61f Female zipper tape 62 Zipper tape body 62m Male zipper tape body 62f Female zipper tape Body portion 63 Zipper tape fitting portion 63m Male zipper tape fitting portion 63f Female zipper tape fitting portion 71 Top portion of paper container with zipper 72 Body portion of paper container with zipper 72d Edge of body portion 73 Paper with zipper Container bottom 74 Top side protrusion 75 Bottom side protrusion 76 Top side protrusion bent portion 77 Notch 78 Laminated sheet 781 Outermost thermoplastic resin layer 782 Paper base layer 783 Innermost thermoplastic layer Resin layer 784 Intermediate adhesive layer 785 Barrier layer 80 Prior art zippered paper container 81 Prior art blank plate 81a Prior art back side blank plate 81b Prior art front side blank plate 812 Prior art second longitudinal fold Line 821 Prior art intermediate transverse fold line (half fold line)
831 prior art wall plate 832 prior art side plate 833 prior art top plate 834 prior art top stack plate 835 prior art bottom plate 836 prior art side edge edge seal allowance 837 prior art bottom edge plate Seal allowance 838 Conventional technology ceiling side protrusion allowance 843 Conventional technology top side plate 851 Conventional technology easy-to-open processing line 856 Conventional technology extraction opening 861 Conventional technology chuck tape 871 Conventional technology zipper Top part 872 of paper container with zipper Body part 873 of paper container with zipper of prior art Bottom part 874 of paper container with zipper of prior art 879 damage (crack)
88 Prior Art Laminated Sheet for Paper Container 881 Prior Art Outermost Thermoplastic Resin Layer 882 Prior Art Paper Base Layer 883 Prior Art Innermost Thermoplastic Resin Layer 884 Prior Art Intermediate Adhesive Layer 885 Prior Art Barrier layer 90 of the present disclosure Paper container with zipper 91 Intermediate paper container with zipper of the present disclosure (flat state)
92 Paper container with zipper in the intermediate stage of the present disclosure (folding state)

A Cutting position of the cross-sectional view of the folded portion of the top side protrusion of the zipper-equipped paper container of the prior art B Cutting position of the cross-sectional view of the folded portion of the top side protrusion of the zipper-equipped paper container of the present disclosure C Chuck Cutting position of the enlarged cross-sectional view of the tape joint

E 1st top intersection (intersection of the 1st vertical fold line and the 1st horizontal fold line)
F Second top intersection (intersection of second vertical fold line and second horizontal fold line)
G 1st bottom intersection (intersection of 1st vertical fold line and 4th horizontal fold line)
H second bottom intersection (intersection of second vertical fold line and third horizontal fold line)
J Third top intersection (intersection between the second vertical bending imaginary line and the upper edge)
K 4th top intersection (intersection of the top side protruding part bending line and the second horizontal bending line)
L Fifth top intersection (point of intersection of the second vertical bending imaginary line and the second horizontal bending line)
X top side protruding part bending line vertex distance

Claims (7)

A paper container with a zipper that is assembled by joining a front side blank plate and a back side blank plate made of laminated sheets with paper as a base material,
An upper overlapping plate for superimposing and joining the front side blank plate and the back side blank plate on the upper part of the paper container with a zipper, and a lower side of the upper overlapping plate connected to the upper side. a top portion comprising a top plate;
a side plate of the top portion connected to both left and right sides of the upper overlapping plate;
a top side protruding part continuously provided on both left and right sides of the top part;
a trunk provided on the underside of the top;
a bottom provided on the underside of the torso;
an upper seal portion that traverses the upper overlapping plate and the upper edge portion of the side plate of the top portion or the vicinity of the upper edge portion;
a zipper tape positioned below the upper sealing portion and crossing the upper overlapping plate and the side plate of the top portion;
The top side protruding portions continuously provided on the left and right sides of the top portion of the paper container with a zipper are attached to the folded portions formed when the top portion side protrusions are joined to the body portion of the paper container with a zipper. A paper container with a zipper, which is provided with a folding line for the protruding part of the top side of the paper container with a zipper. 2. The paper container with a zipper according to claim 1, wherein said top side protruding portion folding line is provided at least on said front side blank plate. 3. The paper container with zipper according to claim 1 or 2, wherein the top side protruding portion bending line is provided on both the front side blank plate and the back side blank plate. 4. The zippered paper container according to any one of claims 1 to 3, wherein the top edge protrusion folding line is a smooth curve. 5. The zipper-equipped paper container according to any one of claims 1 to 4, wherein the top edge protrusion bending line is a single arc. The paper container with a zipper according to any one of claims 1 to 5, wherein the folding line provided in the folding portion of the top side protruding portion is only the top side folding line. A first horizontal folding line, a second horizontal folding line, a third horizontal folding line, and a fourth horizontal folding line are provided on the front side blank plate and the rear side blank plate in order from the upper edge. ,
The blank plate is provided with a first vertical folding line and a second vertical folding line sequentially from the side edges on both sides,
7. According to any one of claims 1 to 6, wherein the second longitudinal fold line extends from the second lateral fold line to the lower edge and does not exist in the direction from the second lateral fold line to the upper edge. A paper container with a zipper as described.

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