JP2022154333A - paper container with zipper - Google Patents

Abstract

To provide a paper container with a zipper where an engaging part between a male mold and a female mold of a zipper tape is dissociated, making it easy to open the opening of the paper container when the zipper tape is opened.MEANS FOR SOLVING THE PROBLEM: A paper container with a zipper 90 includes a front side blank 10b and a back side blank 10a assembled with each other, which are comprised of a laminated sheet 78 containing a paper material layer 782. There is an opening hook 55 at an upper end part 21 of a zipper tape 61 of at least the front side blank plate 10b and the back side blank plate 10a.SELECTED DRAWING: Figure 7

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 paper container with a zipper whose opening can be easily opened when the paper container with a zipper is opened.

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 is a perspective view of the conventional paper container 80 with a zipper, and FIG. 3 is a perspective view with the top opened. indicates

Unless otherwise specified, referring to FIG. It shall indicate the side and the bottom 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.
In addition, the suffix a of the reference numerals indicates the elements of the back side portion of the paper container 80 with zipper, and the suffix b indicates the elements of the front side portion. In elements with both suffixes a and b, the non-suffixed reference shall include both a and b.

In the zipper-equipped paper container 80 described in Patent Document 1, when the top portion 871 is opened and the contents are taken out, the top surface side projecting portion (ear portion) 874 is first removed from the body portion 872. Next, after the easy-to-open processing line 851 is cut, the fitting portions of the male and female halves of the zipper tape 861 are disengaged to open the take-out opening 856 (see FIG. 3).
The contents are then removed through the removal opening 856 .

When opening the zipper tape 861, the front side opening gripping margin 857b of the top side of the front side zipper tape 861b and the back side opening gripping margin 857b of the top side of the back side zipper tape 861a are Grab it with your fingers and open the zippered paper container in the front-rear direction. At that time, the front side opening gripping allowance 857b and the back side opening gripping allowance 857a overlapped, and there was no gap. (See FIG. 15A). As a result, it is difficult to insert a finger into the zipper tape 861, and it is difficult to open the paper container with a zipper.

JP-A-2005-178833

The present disclosure has been made in order to solve the above problems, and the problem is that in a paper container 90 with a zipper, the male and female fitting portions of the zipper tape are disengaged so that the zipper tape can be separated. To provide a zipper-equipped paper container in which a taking-out opening of the zipper-equipped paper container can be easily opened when a paper container is opened.

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 in which a blank plate 10 made of a laminated sheet 78 including a paper base layer 782 is assembled,
The blank plate 10 includes at least a front side blank plate 10b and a back side blank plate 10a,
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,
At least one of the front side blank plate 10b or the back side blank plate 10a is provided with an opening cut portion 55 on the upper edge portion 21 of the zipper tape 61 .

In addition, in the paper container 90 with zipper of the present disclosure,
The upper edge portion 21 of the zipper tape 61 of both the front side blank plate 10b and the back side blank plate 10a may be provided with an opening cut portion 55. As shown in FIG.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger portion 55 may be a ruled line.

In addition, in the paper container 90 with zipper of the present disclosure,
The ruled line of the unsealing part 55 may include a ruled line that is concave when viewed from the outside of the paper container 90 with a zipper.

In addition, in the paper container 90 with zipper of the present disclosure,
The ruled line of the unsealing part 55 may include a ruled line that is convex when viewed from the outside of the paper container 90 with a zipper.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger part 55 may include a horizontal ruled line extending in the horizontal direction of the paper container 90 with a zipper.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger portion 55 may include two or more horizontal ruled lines.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger portion 55 may include a vertical ruled line extending in the vertical direction of the paper container 90 with a zipper.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger part 55 includes two or more vertical ruled lines extending in the vertical direction of the zippered paper container 90,
The vertical ruled lines may be positioned laterally of the zippered paper container 90 with respect to each other.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger portion 55 may include a recessed embossed portion that is recessed in the outer side direction of the paper container 90 with a zipper.

In addition, in the paper container 90 with zipper of the present disclosure,
The opening trigger portion 55 may include a convex embossed portion that is convex in the outer side direction of the zipper-equipped paper container 90 .

According to the embodiment of the present disclosure described above, the following zippered paper container can be provided.
That is, the blank plate 10 of the zippered paper container 90 of the present disclosure is provided with the unsealing trigger portion 55 on the upper side of the zipper tape 61 . When the user opens the top part 71 of the zippered paper container 90 containing the contents, first, the easy-to-open processing line 51 on the top part 71 is cut to expose the zipper tape 61 .

Then, due to the action of the opening trigger portion 55, the end face of the easy-open processing line 51b on the front side and/or the end face of the easy-open processing line 51a on the back side are deformed so as to open outward. For that reason, the opening is provided between the front side opening gripping margin 57b on the top side of the front side zipper tape 61b and the back side opening gripping margin 57a on the top side of the back side zipper tape 61a. A cut gap 58 is created. Therefore, it becomes easy to insert the fingers of the hand, and the front side opening gripping allowance 57b and the back side opening gripping allowance 57a can be easily gripped with the fingers.

When the paper container with zipper is opened in the front-rear direction by gripping the front side opening gripping margin 57b and the back side opening gripping margin 57a with fingers, the zipper tape 61 is released. Therefore, it is possible to provide the zippered paper container 90 that can be easily opened when the user releases the zipper tape 61 of the zippered paper container 90 to take out the contents.

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. 3 is a perspective view of the paper container 80 with a zipper shown in FIG. 2 with the top portion 871 opened. FIG. FIG. 4 is a developed view of a front side blank plate 10b used for manufacturing a zippered paper container 90 according to an embodiment of the present disclosure; FIG. 4 is an exploded view of the back shell blank plate 10a used for manufacturing the zippered paper container 90 of one embodiment of the present disclosure. FIG. 4C 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. 4A and 4B. 4B is a perspective view showing the shape of a paper container (folded state) 92 in an intermediate stage when a paper container 90 with a zipper is manufactured using the blank plate 10 shown in FIGS. 4A and 4B. FIG. FIG. 4B is a perspective view of a zippered paper container 90 produced using the blank plate 10 shown in FIGS. 4A and 4B. FIG. 8 is a side view of the zippered paper container 90 shown in FIG. 7; FIG. 8 is a plan view of the paper container 90 with a zipper shown in FIG. 7; Fig. 10 is a perspective view of a paper container 93 with a zipper from which an upper seal portion has been cut; FIG. 11 is a perspective view showing a state in which the top portion 71 of the zippered paper container 93 from which the upper seal portion shown in FIG. 10 has been removed is opened. 4 is a cross-sectional view of a laminated sheet 78 of one embodiment of blank plate 10. FIG. 4 is a cross-sectional view of a laminated sheet 78 of another embodiment of blank plate 10. FIG. 8 is a cross-sectional view of a laminated sheet 78 of still another embodiment of the blank plate 10; FIG. 8 is a cross-sectional view of a laminated sheet 78 of still another embodiment of the blank plate 10; FIG. Fig. 2 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper according to the first aspect of the first embodiment. (Enlarged view of part A in FIG. 5). FIG. 11 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper according to the second aspect of the first embodiment. (Enlarged view of part A in FIG. 5). FIG. 11 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with zipper according to the third aspect of the first embodiment. (Enlarged view of part A in FIG. 5). FIG. 4 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper of the first aspect of the second embodiment and the first aspect of the fourth embodiment. (Enlarged view of part A in FIG. 5). FIG. 11 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper of the second aspect of the second embodiment and the second aspect of the fourth embodiment. (Enlarged view of part A in FIG. 5). FIG. 11 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper of the first aspect of the third embodiment and the first aspect of the fifth embodiment. (Enlarged view of part A in FIG. 5). FIG. 11 is a partially enlarged view of a paper container (planar state) in an intermediate stage of the paper container 90 with a zipper of the second aspect of the third embodiment and the second aspect of the fifth embodiment. (Enlarged view of part A in FIG. 5). 1 is an end view of the top edge of a prior art zippered paper container 80 with the top seal portion cut away. FIG. (It is the same position as arrow B described in FIG. 10.) FIG. 11 is a cross-sectional view of the upper overlapping plate 34 at the cross-sectional position DD shown in FIG. 10 in the zippered paper container 90 of the first aspect of the first embodiment. The end surface of the upper edge portion 21 of the paper container 93 with a zipper from which the upper seal portion of FIG. It is a diagram. (See arrow B in FIG. 10). FIG. 11 is an end view of the upper edge portion 21 of the paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). FIG. 11 is an end view of an upper edge portion 21 of a paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). FIG. 11 is an end view of an upper edge portion 21 of a paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). FIG. 11 is an end view of the upper edge portion 21 of the paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). FIG. 11 is an end view of the upper edge portion 21 of the paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). FIG. 11 is an end view of the upper edge portion 21 of the paper container 93 with a zipper from which the upper seal portion of FIG. 10 has been removed in the paper container 90 with a zipper of the first aspect of the fourth embodiment. (See arrow B in FIG. 10). FIG. 11 is an end view of an upper edge portion 21 of a paper container 93 with a zipper from which the upper seal portion of FIG. (See arrow B in FIG. 10). 11 is an end view of an upper edge portion 21 of a paper container 93 with a zipper from which the upper seal portion of FIG. 10 has been removed, in the paper container 90 with a zipper of the first aspect of the fifth embodiment. FIG. (See arrow B in FIG. 10). 11 is an end view of an upper edge portion 21 of a zipper-equipped paper container 93 from which the top seal portion of FIG. 10 has been removed, in the zipper-equipped paper container 90 of the second aspect of the fifth embodiment. FIG. (See arrow B in FIG. 10). 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. 5 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. 5 cross-sectional position CC).

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 zippered paper container 90 of the present disclosure is laminated with a paper base layer 782, and a paper base protective layer 788 is laminated on any layer of the outer side of the paper base layer 782, and Using a laminate sheet 78 in which a thermoplastic resin such as polyethylene is laminated as at least the innermost layer, the outer shape is formed into a rectangular shape, and various folding lines provided in the blank plate 10 are used to form a paper container 90 with a zipper. Forming plates for each part necessary for forming are divided.

<First Aspect of First Embodiment>
<Blank plate>
The blank plate 10 of the zipper-equipped paper container 90 of this embodiment is shown in FIGS. 4A and 4B. FIG. 4A represents the back side blank plate 10a and FIG. 4B 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 side edge 21b of the front side blank plate 10b in FIG.

In both FIGS. 4A and 4B, the front surface of the drawing is the outer surface when the zipper-equipped paper container 90 is assembled, and the back surface is the inner surface.
4A and 4B are line symmetrical with respect to the upper edges 21a and 21b, respectively, except for some components (for example, the opening trigger 55) described later, and the back side blank When the inner surfaces of the 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, chuck tape joint portions, etc., which will be described later) are placed on top of each other.

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. 6 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. 4B. The back shell blank plate 10a will also be described with its upper edge 21a as the upper shell. Therefore, FIG. 4A 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 FIG. 7).
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 front side blank plate 10b of the zipper-equipped paper container 90 of this embodiment uses a laminated sheet 78 in which at least paper as a base material is laminated, and at least a thermoplastic resin such as polyethylene is laminated as the innermost layer. formed into a shape. Referring to FIG. 4B, the upper side is the front side upper edge portion 21b, the left and right sides are the front side edge portions 11b, and the lower side is the front side lower edge portion 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, from the left side, a front side first vertical folding line 12b, a front side second vertical folding line 13b, a front side second vertical folding line 13b, and a front side A side first longitudinal fold 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.

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 front side top side oblique folding line 17b starts from the front side second top side intersection Fb, which is the intersection point of the front side second vertical folding line 13b and the front side second horizontal folding line 23b. and
Furthermore, the oblique folding line 17b of the top side of the front side is the intersection point of the second top side of the front side Fb, the first vertical folding line 12b of the front side, and the first horizontal folding line 22b of the front side. , and further extends to the front side edge 11b. The intersection of the front side edge portion 11b and the front side top side oblique folding line 17b is the end point of the front side top side oblique folding line 17b.

The oblique bottom side folding line 18b of the front side starts from the second bottom side intersection Hb, which is the intersection point of the second vertical folding line 13b of the front side and the third horizontal folding line 24b of the front side. .
Furthermore, the oblique fold line 18b of the bottom side of the front side is the intersection point of the second bottom side of the front side Hb, the first vertical fold line 12b of the front side, and the fourth horizontal fold line 25b of the front side. It connects with the front side first bottom intersection Gb and further extends to the front side edge 11b. The intersection of the front side edge portion 11b and the front side bottom side oblique folding line 18b is the end point of the side side bottom side oblique folding line 18b.

In addition, the oblique folding line 17b of the top side of the front side may be located in the vicinity of the intersection point Fb of the second top side of the front side without being in contact therewith. Further, the oblique folding line 18b of the front side bottom portion may be located in the vicinity of the second bottom side intersection Hb of the front side without being in contact therewith.

In addition, the oblique folding line 17b of the top side of the front side does not contact the first top section intersection point Eb of the front side, and the vicinity thereof does not have to exist. Alternatively, the oblique folding line 17b of the top side of the front side may not exist between the first crossing point Eb of the first top side of the front side and the side edge portion 11b of the front side.
Furthermore, the oblique fold line 18b of the bottom side of the front side does not contact the first bottom side intersection point Gb of the front side, and the vicinity thereof may not exist. Alternatively, the oblique fold line 18b of the bottom side of the front side may not exist between the first bottom intersection point Gb of the front side and the side edge 11b of the front side.

By locating the oblique folding lines of each of the front sides and the respective intersections in the vicinity without contacting each other, it is possible to achieve sufficient folding performance while preventing excessive concentration of folding lines at specific locations. Therefore, 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 allowance 37b is formed through the fourth horizontal bending line 25b of the front side. ing.

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 front side is connected to the outside of both the left and right sides of the upper upper overlapping plate 34b via the second vertical bending line 13b of the front side. there is

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 second vertical folding line 13b. .

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.

Furthermore, on the upper side of the front side zipper tape joining portion 52b, a front side opening cut portion 55b that crosses between the left and right front side second vertical folding lines 13b at the shortest is provided. A concave horizontal ruled line 551b is provided.

The processing (crease processing) for giving the blank plate 10 with folding lines in this embodiment 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. . 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.

Further, the back side blank plate 10a and the front side blank plate 10b are line-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. 5 is a front view showing the shape of a chuck-equipped paper container (flat state) 91 at an intermediate stage when the chuck-equipped paper container 90 is manufactured using the blank plate 10 shown in FIGS. 4A and 4B. The uppermost portion is the upper edge portion 21b of the front side blank plate 10b shown in FIG. 4B, 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. 5, 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 variations when viewed through the drawing. The notation and subscripts of wa may be omitted in the explanation.

An enlarged view of the upper portion of the zippered paper container (flat state) 91 in the intermediate stage is shown in FIG. 13A. FIG. 6 is an enlarged view of area A indicated in FIG. 5; A concave horizontal ruled line 551 is provided on the upper side of the zipper tape 61 so as to cross between the left and right side edge portions 11 . Note that the concave horizontal ruled line 551 is one aspect of the opening trigger portion 55, which will be described later.

The upper overlapping plate 34 and the side plate 41 of the top of the front side are provided with an upper sealing portion 53 as a transverse sealing means at a predetermined position where the above-described two blank plates 10 overlap each other, and an easy-to-open processing. A line 51 , a concave horizontal ruled line 551 , and a zipper tape joint 52 are provided in sequence from the upper edge 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. 5 , the easy-open processing line 51 extends from one side edge portion 11 of the blank plate 10 to the other side edge portion 11 , and is between the upper seal portion 53 and the concave horizontal ruled line 551 . exist.

A 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 accuracy 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 51, it may be possible to open the package manually.

Furthermore, if the easy-open processing line 51 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 51 shown in FIGS. 4A and 4B. 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. 18A and 18B).

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.

The paper base layer 782 will be described. 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, base paper for cups, base paper for milk cartons, and the like can be preferably used, and the appropriate basis weight is in the range of 80 to 320 g/m ² .

The thermoplastic resin layer (sealant layer) used for the innermost layer and, if necessary, the outermost layer and the intermediate layer will be described. As the resin for the thermoplastic resin layer (sealant layer), in addition to low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and single site catalyst are used. Polymerized ethylene/α-olefin copolymer, ethylene/vinyl acetate copolymer (EVA), ethylene/acrylic acid copolymer (EAA), ethylene/methacrylic acid random copolymer (EMAA), ethylene/ Methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomer, polypropylene and its copolymer, polyester resin, etc. can be used. A suitable one can be appropriately selected and used according to the contents to be stored and the conditions of storage and use.

Among the above thermoplastic resins, especially ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) have thermal stability during processing such as extrusion coating, and various substrates. The outermost thermoplastic resin layer, which does not require much thickness, can be formed with a relatively thin thickness of, for example, 6 to 10 μm. It is also easy to perform extrusion coating and lamination at a low 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 thermoplastic resin layers (sealant layers) of the innermost layer as described above, and optionally the outermost layer and the intermediate layer (sealant layer) may be easily subjected to anchor coat, corona treatment, flame (flame) treatment, etc. on the lamination surface as necessary. After applying adhesive treatment, resin can be extrusion-coated and laminated on it, or thermoplastic resin can be formed into a film in advance and the film can be subjected to known dry lamination or extrusion lamination (sandwich lamination). For example, they can be laminated by pasting together.

When the barrier layer 785 is laminated on the intermediate layer of the lamination 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 such as a biaxially stretched PET film or a biaxially stretched PET film. A vapor-deposited film obtained by vapor-depositing a base film such as an axially stretched nylon film (ONy film) and a biaxially stretched polypropylene film (OPP film) to a thickness of 20 to 100 nm can be used. Alternatively, saponified ethylene-vinyl acetate copolymer (hereinafter sometimes referred to as EVOH) film, biaxially stretched nylon MXD6 film, polyacrylonitrile film, and PET provided with a coating layer of polyvinylidene chloride Films, ONy films, OPP films, etc. 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 laminated sheet 78 are shown in FIGS. 12A, 12B, 12C, and 12D.

FIG. 12A is a cross-sectional view of a laminated sheet 78 of the blank plate 10 consisting of three layers.
(Outer surface side) Outermost thermoplastic resin layer 781 / Paper base layer 782 /
Innermost thermoplastic resin layer 783 (inner side)

FIG. 12B 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.
(Outer surface) Paper base layer 782 / Innermost thermoplastic resin layer 783 (Inner surface)
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. 12A.

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. 12C 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.
(Outer Side) Outermost Thermoplastic Resin Layer 781/Paper Base Layer 782/Intermediate Adhesive Layer 784/Barrier Layer 785/Innermost Thermoplastic Resin Layer 783 (Inner Side)

FIG. 12D 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.
(Outer Side) Paper Base Layer 782 / Intermediate Adhesive Layer 784 / Barrier Layer 785 /
Innermost thermoplastic resin layer 783 (inner 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. 12C.

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 in some cases 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.

18A and 18B show enlarged cross-sectional views of the joining portion of the zipper tape 61 where the zipper tape 61 and the blank plate 10 are joined in the paper container with zipper (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. 12D.

In FIG. 18A, 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. 18B, 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.

<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. 6, 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 in which the thermoplastic resin layer (sealant layer) is heat-sealed.
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. 7 is a perspective view showing a zipper-equipped paper container 90 of this embodiment. FIG. 8 is a side view of the zippered paper container 90 shown in FIG. FIG. 9 is a plan view of the zippered paper container 90 shown in FIG.

The zippered paper container 90 shown in FIG. 7 has a substantially rectangular parallelepiped outer shape, and has a ridge 72d of the body portion 72 thereof.
Since the zippered paper container 90 is composed of a flexible laminated sheet 78 mainly made of paper, it does not have a perfect rectangular parallelepiped shape.

<Opening operation for taking out a paper container with a zipper>
A procedure for opening the top portion 71 of the package of the completed paper container 90 with a zipper to take out the contents will be described.
First, the top side projecting portion 74 joined to the trunk portion 72 is peeled off. By lifting the top side protrusion 74 upward, the top side side plate 41 is erected, and the upper overlapping plate 34 is also erected accordingly. The top side plate 41 and the upper overlapping plate 34 are substantially flush with each other.

Then, the easy-to-open processing line 51 is manually opened from a notch 77 provided in one side (here, the right side) of the side edge portion 11, and the other side (here, the left side) is opened. is cut down to the side edge 11 of the . Then, the upper seal portion 53 is excised. At this stage, the zipper tape 61 has not yet been separated and has the shape shown in FIG.

FIG. 15C shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion has been removed, viewed from the direction of arrow B shown in FIG. 10 .
An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because, due to the existence of concave horizontal ruled lines 551 crossing between the left and right side edge portions 11, which are one aspect of the opening trigger portion 55, each of the opening gripping margins 57 above the concave horizontal ruled lines 551 is This is because they are deformed in an outward direction (a direction away from each other). Note that the opening trigger 55 will be described in detail later.
Since a finger can be easily inserted into the opening opening gap 58, the zipper tape 61 can be easily released.

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. FIG. 11 shows a zippered paper container 90 in which the top portion 71 is open.

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.

<Opening trigger part>
The unsealing trigger 55 will be described.
When the user opens the top part 71 of the zippered paper container 90 containing the contents, first, the easy-to-open processing line 51 on the top part 71 is cut to expose the zipper tape 61 . When the paper container with a zipper is opened in the front-rear direction by gripping the front side opening gripping margin 57b and the back side opening gripping margin 57a with fingers, the zipper tape 61 is released.

At that time, if there is an opening gap 58 between the front side opening gripping margin 57b and the back side opening gripping margin 57a, it becomes easier to insert a finger and the zipper tape 61 is released. easier.
By providing the unsealing starting portion 55 on the upper side of the zipper tape 61, an unsealing starting gap 58 is likely to occur when the easy-to-open processing line 51 is cut.

In this aspect, concave horizontal ruled lines 551 crossing between the left and right side edge portions 11, which are one aspect of the opening trigger portion 55, are exemplified. A recessed horizontal ruled line 551 that is recessed when viewed from the outside of the paper container 90 with a zipper is provided on the upper side of the zipper tape 61, so that an opening gripping margin 57 between the zipper tape 61 and the easy-to-open processing line 51 is provided. is deformed in the direction of opening in the front-rear direction. As a result, an opening opening gap 58 is formed between the front side opening gripping margin 57b and the back side opening gripping margin 57a.

FIG. 15A is an end view of the top edge of a prior art zippered paper container with the top seal portion cut away. FIG. 10 is a diagram relating to a zippered paper container 90 of the present disclosure, and is also used as a reference in the description herein. 15A is a view viewed from the direction of arrow B shown in FIG. 10. FIG.

In FIG. 15A, side edge sealing allowances 836 are shown on both left and right side edges, and a first vertical folding line 812 is shown on the inner side thereof, and a second vertical folding line 813 is also shown on the inner side thereof.
There is an upper overlapping plate 834 between the left and right second vertical bending lines 813, and the upper overlapping plate 834 is cut along the easy-to-open processing line 851, leaving the zipper tape 861 with an unsealing gripping margin 57. It is shown.

In FIG. 15A, the front and back opening gripping tabs 57a and 57a are in contact or close proximity with little or no gap between them. Therefore, it is difficult to insert the fingers of the hand.

FIG. 15B is a cross-sectional view at cross-sectional position DD shown in FIG. FIG. 4 is a cross-sectional view of the upper stacking plate 34 of the zippered paper container 93 from which the upper sealing portion 53 of this embodiment has been removed.

A front side concave horizontal ruled line 551b is provided in the front side opening gripping margin 57b positioned on the upper side of the front side zipper tape 61b. In addition, a back side concave horizontal ruled line 551a is provided in the back side opening gripping margin 57a positioned on the upper side of the back side zipper tape 61a.
Due to the concave lateral ruled line 551b, the lateral concave ruled line 551b tilts the lateral side 57b above the lateral concave ruled line 551b. Further, the back side 57a above the back side concave horizontal ruled line 551a is inclined in the back side direction due to the back side concave horizontal ruled line 551a.

Therefore, an unsealing gap 58 is formed between the cut portion of the easy-open processing line 51b on the front side and the easy-open processing line 51a on the back side.
The opening trigger gap 58 shown in FIG. 15B is the same as the opening trigger gap 58 shown in FIG. 15C. dissociation becomes easier.

The zipper tape 61 can be easily released even in the unsealing gap 58 caused by either the concave horizontal ruled line 551b on the front side or the horizontal concave ruled line 551a on the back side. However, if the concave horizontal ruled line 551b on the front side faces the horizontal concave ruled line 551a on the back side, a larger opening opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

Instead of the concave horizontal ruled line 551, a convex horizontal ruled line 554 that is convex when viewed from the outside may be used. Since the opening gripping portion 57 has the convex horizontal ruled line 554, the opening gripping portion 57 is deformed from a flat plate shape, thereby forming an opening opening gap between the front side opening gripping portion 57b and the back side opening gripping portion 57a. 58 is produced.

The opening trigger portion 55 is not limited to the concave horizontal ruled line 551, and may be a convex ruled line or a rectangular embossment described later. Furthermore, if it is a means for creating an opening gap 58 between the front side opening gripping margin 57b and the back side opening gripping margin 57a, for example, a spacer may be attached or hot melt may be applied. good.
Further, the shape of the front side opening cut portion 55b of the front side blank plate 10b and the shape of the back side opening cut portion 55a of the back side blank plate 10a may be different.

<Second Aspect of First Embodiment>
FIG. 13B shows a zippered paper container (flat state) 91 in the intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the previous process. The blank plate 10 of this aspect is provided with an unsealing trigger portion 55 . The opening trigger portion 55 consists of two concave horizontal ruled lines 551 crossing between the side edge portions 11 of the left and right sides, and is present on the upper side of the zipper tape 61 . Then, a zippered paper container 90 is produced from the blank plate 10 .

The shape of the blank plate 10 other than the opening trigger 55 is the same as that of the first aspect of this aspect (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the manufacturing method of the zipper-equipped paper container 90, the filling method of the zipper-equipped paper container 90, and the like are the same as in the first aspect of the present embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that,
The easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 15C shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 formed by the procedure has been removed.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because, due to the presence of the horizontal concave ruled line 551, each of the opening gripping margins 57 above the horizontal concave ruled line 551 is deformed in the outward direction (the direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing gap 58 caused by either the concave horizontal ruled line 551b on the front side or the horizontal concave ruled line 551a on the back side. However, if the concave horizontal ruled line 551b on the front side faces the horizontal concave ruled line 551a on the back side, a larger opening opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

Instead of the concave horizontal ruled line 551, a convex horizontal ruled line 554 that is convex when viewed from the outside may be used. Since the opening gripping portion 57 has the convex horizontal ruled line 554, the opening gripping portion 57 is deformed from a flat plate shape, thereby forming an opening opening gap between the front side opening gripping portion 57b and the back side opening gripping portion 57a. 58 is generated.

The opening trigger 55 includes various opening triggers 55 to be described later, or other shapes of the opening trigger 55. The shape of the opening trigger 55 of the front blank plate 10b and the back blank plate 10a can be different.

<Third Aspect of First Embodiment>
FIG. 13C shows a zippered paper container (flat state) 91 in an intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the previous step. The blank plate 10 of this aspect is provided with an unsealing trigger portion 55 . The opening trigger portion 55 is located substantially in the center of the lateral width of the zippered paper container 90 , consists of one short concave horizontal ruled line 551 , and is present on the upper side of the zipper tape 61 .

The length of the concave horizontal ruled line 551 is desirably 10 mm or more so that fingers can easily catch it. There may be. Therefore, the length of the horizontal concave ruled line 551 does not become longer than necessary, so that the force required for processing the horizontal concave ruled line 551 does not become large.

Shapes other than the opening trigger 55 are the same as those of the first aspect of the present embodiment (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the manufacturing method of the zipper-equipped paper container 90, the filling method of the zipper-equipped paper container 90, and the like are the same as in the first aspect of the present embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 15D shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because, due to the presence of the horizontal concave ruled line 551, each of the opening gripping margins 57 above the horizontal concave ruled line 551 is deformed in the outward direction (the direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing gap 58 caused by either the concave horizontal ruled line 551b on the front side or the horizontal concave ruled line 551a on the back side. However, if the concave horizontal ruled line 551b on the front side faces the horizontal concave ruled line 551a on the back side, a larger opening opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

Instead of the concave horizontal ruled line 551, a convex horizontal ruled line 554 that is convex when viewed from the outside may be used. Since the opening gripping portion 57 has the convex horizontal ruled line 554, the opening gripping portion 57 is deformed from a flat plate shape, thereby forming an opening opening gap between the front side opening gripping portion 57b and the back side opening gripping portion 57a. 58 is generated.

<First Aspect of Second Embodiment>
FIG. 14A shows a zippered paper container (flat state) 91 in the intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening trigger 55. The opening trigger 55 is located substantially in the center of the lateral width of the zipper-equipped paper container 90 and consists of two short concave vertical ruled lines 552. .

The concave vertical ruled line 552 is located on the upper side of the zipper tape 61 and extends to the easy-open processing line 51 . The concave vertical ruled line 552 may not reach the easy-open processing line 51 or may exceed the easy-open processing line 51 .
The interval between the two vertical concave ruled lines 552 is 20 mm. The interval between the two vertical concave ruled lines 552 may be 10 mm or more, or may be 50 mm or less.
Alternatively, the concave vertical ruled line 552 may be located inside a position 10 mm away from the second vertical folding line 13 in the inner side direction. By doing so, the folding of the second vertical folding line 13 is not hindered.

Shapes other than the opening trigger 55 are the same as those of the first aspect of the first embodiment (see FIGS. 4A, 4B, and 5). In addition, the front side blank plate 10b and the back side blank plate 10a have the same shape as line symmetry.

The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.
The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 16A shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because the presence of the concave vertical ruled line 552 deforms each of the opening gripping margins 57 in the outward direction (the direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the concave vertical ruled line 552b on the front side or the concave vertical ruled line 552a on the back side. However, if the concave vertical ruled line 552b on the front side and the vertical concave ruled line 552a on the back side face each other, a larger unsealing opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<Second Aspect of Second Embodiment>
FIG. 14B shows a zippered paper container (flat state) 91 at an intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the preceding step. The blank plate 10 of this embodiment is provided with an opening trigger portion 55. The opening trigger portion 55 is located substantially in the center of the lateral width of the paper container 90 with a zipper and consists of five short concave vertical ruled lines 552. .

The concave vertical ruled line 552 is located on the upper side of the zipper tape 61 and extends beyond the easy-open processing line 51 . The concave vertical ruled line 552 may not reach the easy-open processing line 51 , or may reach the easy-open processing line 51 .
The five vertical concave ruled lines 552 are equally spaced inside a width of 20 mm in the horizontal direction (the distance between the outermost concave vertical ruled lines 552 on the left and right sides). In this embodiment, the intervals are 5 mm. The lateral width may be 10 mm or more and may be 50 mm or less.
Alternatively, the concave vertical ruled line 552 may be located inside a position 10 mm away from the second vertical folding line 13 in the inner side direction. By doing so, the folding of the second vertical folding line 13 is not hindered.

Shapes other than the opening trigger 55 are the same as those of the first aspect of the first embodiment (see FIGS. 4A, 4B, and 5). In addition, the front side blank plate 10b and the back side blank plate 10a have the same shape as line symmetry.

The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.
The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 16B shows a cut surface of the easy-to-open processing line 51 of the paper container 93 with zipper from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because the presence of the concave vertical ruled line 552 deforms each of the opening gripping margins 57 in the outward direction (the direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the concave vertical ruled line 552b on the front side or the concave vertical ruled line 552a on the back side. However, if the concave vertical ruled line 552b on the front side and the vertical concave ruled line 552a on the back side face each other, a larger unsealing opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<First Aspect of Third Embodiment>
FIG. 14C shows a zippered paper container (flat state) 91 at an intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening trigger portion 55 , which is located substantially in the center of the lateral width of the paper container 90 with a zipper and consists of a recessed embossed portion 553 . The recessed embossed portion 553 is recessed when viewed from the outside of the paper container 90 with a zipper and has a rectangular shape.

The recessed embossed portion 553 is located on the upper side of the zipper tape 61 and is in contact with the easy-to-open processing line 51 . The recessed embossed portion 553 may be in the vicinity without reaching the easy-open processing line 51 , or may exist across the easy-open processing line 51 .
The size of the concave embossed portion 553 of this embodiment is 20 mm in width in the horizontal direction and 3 mm in width in the vertical direction. The vertical width of the concave embossed portion 553 may be 2 mm or more, and the horizontal width thereof may be 10 mm or more. By doing so, it becomes easier for a finger to catch the opening gripping margin.
Further, the vertical width of the recessed embossed portion 553 may be 10 mm or less, and the horizontal width thereof may be 50 mm or less. By using such a size, the force required for processing the recessed embossed portion 553 does not become large.

Shapes other than the opening trigger 55 are the same as those of the first aspect of the first embodiment (see FIGS. 4A, 4B, and 5). In addition, the front side blank plate 10b and the back side blank plate 10a have the same shape as line symmetry.

The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.
The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 16C shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because the presence of the recessed embossed portions 553 deforms each of the opening gripping margins 57 in the outward direction (the direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the front side concave embossed portion 553b or the back side concave embossed portion 553a. However, when the concave embossed portion 553b on the front side faces the concave embossed portion 553a on the back side, a larger unsealing opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<Second Aspect of Third Embodiment>
FIG. 14D shows a zippered paper container (flat state) 91 at an intermediate stage of this embodiment, and the blank plate 10 of this embodiment was prepared in the preceding step. The blank plate 10 of this embodiment is provided with an opening trigger portion 55. The opening trigger portion 55 is located substantially in the center of the lateral width of the paper container 90 with a zipper, and includes a concave embossed portion 553 and two concave portions. It consists of vertical ruled lines 552 .

The recessed embossed portion 553 is located on the upper side of the zipper tape 61 and straddles the easy-open processing line 51 . The recessed embossed portion 553 may be in the vicinity without reaching the easy-open processing line 51 , or may be in contact with the easy-open processing line 51 .

The size of the concave embossed portion 553 of this embodiment is 10 mm in width in the horizontal direction and 6 mm in width in the vertical direction.
The two vertical concave ruled lines 552 of this embodiment are provided on both left and right sides of the concave embossed portion 553 with a distance of 5 mm. The interval between the two vertical concave ruled lines 552 is 20 mm.
By combining the concave vertical ruled lines 552 and the concave embossed portions 553 in the opening trigger portion 55, the ease of opening is ensured, and the variety of designs is further expressed.

Shapes other than the opening trigger 55 are the same as those of the first aspect of the first embodiment (see FIGS. 4A, 4B, and 5). In addition, the front side blank plate 10b and the back side blank plate 10a have the same shape as line symmetry.

The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.
The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . Then, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 16D shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 formed by the procedure has been removed.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because the presence of the concave vertical ruled lines 552 and the concave embossed portions 553 causes each of the opening gripping margins 57 to deform outward (in a direction away from each other).
Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

Front side concave vertical ruled line 552b and front side concave embossed portion 553b provided on front side blank plate 10b, or reverse side concave vertical ruled line 552a and reverse side concave embossed portion 553a provided on back side blank plate 10a The zipper tape 61 is easily separated even in the unsealing gap 58 caused by either one of the above.
However, the front side concave vertical ruled line 552b and the front side concave embossed portion 553b provided on the front side blank plate 10b, the back side concave vertical ruled line 552a provided on the back side blank plate 10a, and the back side When the recessed embossed portion 553a is located at a position facing each other, a larger unsealing opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<First Aspect of Fourth Embodiment>
This aspect replaces the concave vertical ruled lines 552 of the first aspect of the second embodiment with convex vertical ruled lines 555 . That is, the concave vertical ruled line 552 shown in FIG. 14A is replaced with the convex vertical ruled line 555 .

The shape of the blank plate 10 other than the opening trigger portion 55 is the same as that of the first aspect of the present embodiment (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 17A shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. An unsealing gap 58 is generated by the concave portion inside the convex vertical ruled line 555 . Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the convex vertical ruled line 555b on the front side or the convex vertical ruled line 555a on the back side. However, when the convex vertical ruled line 555b on the front side faces the convex vertical ruled line 555a on the back side, a larger opening opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<Second Aspect of Fourth Embodiment>
In this aspect, the concave vertical ruled lines 552 of the second aspect of the second embodiment are replaced with convex vertical ruled lines 555 . That is, the concave vertical ruled lines 552 shown in FIG. 14B are replaced with convex vertical ruled lines 555 .

The shape of the blank plate 10 other than the opening trigger portion 55 is the same as that of the first aspect of the present embodiment (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 17B shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been removed, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. An unsealing gap 58 is created by the concave portion inside the convex vertical ruled line 555 . Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the convex vertical ruled line 555b on the front side or the convex vertical ruled line 555a on the back side. However, if the convex vertical ruled line 555b on the front side faces the convex vertical ruled line 555a on the back side, a larger opening opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<First Aspect of Fifth Embodiment>
In this aspect, the concave embossed portions 553 of the first aspect of the third embodiment are replaced with convex embossed portions 556 . That is, the concave embossed portion 553 shown in FIG. 14C is replaced with a convex embossed portion 556 .

The shape of the blank plate 10 other than the opening trigger portion 55 is the same as that of the first aspect of the present embodiment (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 17C shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. An unsealing gap 58 is created by the concave portion inside the convex embossed portion 556 . Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

The zipper tape 61 can be easily released even in the unsealing opening gap 58 caused by either the convex embossed portion 556b on the front side or the convex embossed portion 556a on the back side. However, if the convex embossed portion 556b on the front side faces the convex embossed portion 556a on the back side, a larger unsealing opening gap 58 is generated, and the zipper tape 61 becomes easier to separate.

<Second Aspect of Fifth Embodiment>
In this aspect, the concave vertical ruled lines 552 of the second aspect of the third embodiment are replaced with convex vertical ruled lines 555, and the concave embossed portions 553 are replaced with convex embossed portions 556. be. That is, the concave vertical ruled lines 552 shown in FIG. 14B are replaced with convex vertical ruled lines 555 , and the concave embossed portions 553 are replaced with convex embossed portions 556 .

The shape of the blank plate 10 other than the opening trigger portion 55 is the same as that of the first aspect of the present embodiment (see FIGS. 4A, 4B, and 5). Further, the shape of the front side blank plate 10b and the shape of the back side blank plate 10a are axisymmetrically the same.
The layer structure of the laminated sheet 78 of the blank plate 10, the method of manufacturing the paper container 90 with a zipper, the method of filling the paper container 90 with a zipper, and the like are the same as those in the first aspect of the first embodiment.

The blank plate 10 of this embodiment is assembled to produce a zippered paper container 90 . After that, the easy-to-open processing line 51 is cut, and the upper seal portion 53 is excised. FIG. 17D shows a cut surface of the easy-to-open processing line 51 of the zipper-equipped paper container 93 from which the upper seal portion 53 has been cut, which is formed by the procedure.

An opening opening gap 58 is formed between the front side opening gripping allowance 57b and the back side opening gripping allowance 57a. This is because the convex vertical ruled line 555 and the concave portion inside the convex embossed portion 556 create an unsealing gap 58 . Since fingers can be easily inserted into the unsealing gap 58, the zipper tape 61 can be easily released.

Front side convex vertical ruled line 555b and front side convex embossed portion 556b provided on front side blank plate 10b, or back side convex vertical ruled line 555a and back side convex provided on back side blank plate 10a The zipper tape 61 can be easily released even at the unsealing gap 58 caused by either one of the embossed portions 556a.

However, the front side convex vertical ruled line 555b and the front side convex embossed portion 556b provided on the front side blank plate 10b, and the back side convex vertical ruled line 555a provided on the back side blank plate 10a and the back side are When the convex embossed portion 556a is located at a position facing each other, a larger unsealing gap 58 is generated, and the zipper tape 61 is more easily separated.

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. 4A and 4B corresponding to the first embodiment, a paper container 90 with a zipper shown in FIG. 7 was produced.

The two blank plates 10 of FIGS. 4A and 4B 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. FIG. 12D shows a cross-sectional view of the laminated sheet 78, but the printed layer such as a pattern is not shown.
The laminated sheet 78 of the blank plate 10 has the following structure.
(outer side)
Pattern printed layer (gravure printing on the outer surface of the paper base layer 782) /
Paper base layer 782 (base paper for liquid paper container 150 g/m ² Nippon Paper Industries) /
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) is formed by extrusion lamination on the opposite side (inner side) of the paper base layer 782 of the barrier layer 785, and is rolled up again. rice field.

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 roll-shaped laminated sheet 78 is unwound, and the blank plate 10 is completed by subjecting it to creasing, punching, and the like.

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 7 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.

Further, side plates 41 of the top portion were provided on the outside of both flanks of the upper overlapping plate 34 via the second vertical folding line 13 .
Further, on the outside of both flanks of the top panel 33 , a top ridge protruding portion allowance 38 is provided via the second vertical bending line 13 .
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 . 5, 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 layer 782 of the laminated sheet 78. . The easy-open processing line 51 was provided as an intermittent half-cut line.

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.

Furthermore, one concave horizontal ruled line 551 was provided on the upper side of the zipper tape 61 so as to cross the blank plate 10 in parallel with the zipper tape 61 . The concave horizontal ruled line 551 was concave when viewed from the outside of the zipper-equipped paper container 90 . The distance between the zipper tape 61 and the concave horizontal ruled line 551 was 2 mm. The reference position for the spacing of the concave horizontal ruled lines 551 is the central portion of the ruled line in the transverse direction, and the same applies to the other ruled lines.

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.

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.
A top portion 71 formed by the top plate 33 and a body portion 72 having a substantially rectangular horizontal cross section (a plane substantially parallel to the bottom surface) continue below the upper overlapping plate 34, and a bottom portion 73 opens in a substantially rectangular shape. An intermediate-stage paper container with zipper (folded state) 92 was formed. (See Figure 6).

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 . Hot melt was used for the joining.
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.

When the top side protrusion 74 is joined to the trunk portion 72, the angle formed by the top side protrusion 71 and the top side protrusion 74 via the bent portion 76 of the top side protrusion 74 is approximately Right angle.

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.
As described above, the paper container 90 with a zipper of this example was produced.

<Example 2>
In this example, a blank plate in which the concave horizontal ruled lines 551 shown in FIG. 13A (same as FIGS. 4A and 4B) are changed to convex horizontal ruled lines 554, which corresponds to the first aspect of the first embodiment. 10, a zippered paper container 90 was produced. Similar convex horizontal ruled lines 554 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 zipper-equipped paper container 90 was produced using a blank plate 10 provided with concave horizontal ruled lines 551 shown in FIG. 13B, which corresponds to the second aspect of the first embodiment. Similar concave horizontal ruled lines 551 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 4>
In this example, using the blank plate 10 corresponding to the second aspect of the first embodiment, in which the concave horizontal ruled lines 551 shown in FIG. 90 were made. Similar convex horizontal ruled lines 554 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 5>
In this example, a zipper-equipped paper container 90 was produced using a blank plate 10 provided with concave horizontal ruled lines 551 shown in FIG. 13C, which corresponds to the third aspect of the first embodiment. Similar concave horizontal ruled lines 551 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 6>
In this example, using the blank plate 10 corresponding to the third aspect of the first embodiment, in which the concave horizontal ruled lines 551 shown in FIG. 90 were made. Similar convex horizontal ruled lines 554 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 7>
In this example, a zipper-equipped paper container 90 was produced using the blank plate 10 provided with the concave vertical ruled lines 552 shown in FIG. 14A, which corresponds to the first aspect of the second embodiment. Similar concave vertical ruled lines 552 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 8>
In this example, using the blank plate 10 corresponding to the first aspect of the fourth embodiment, in which the concave vertical ruled lines 552 shown in FIG. 90 were made. Similar convex vertical ruled lines 555 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 9>
In this example, a zippered paper container 90 was produced using the blank plate 10 provided with the concave vertical ruled lines 552 shown in FIG. 14B, which corresponds to the second aspect of the second embodiment. Similar concave vertical ruled lines 552 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 10>
In this example, using the blank plate 10 corresponding to the second aspect of the fourth embodiment, in which the concave vertical ruled lines 552 shown in FIG. 90 were made. Similar convex vertical ruled lines 555 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 11>
In this example, a zipper-equipped paper container 90 was produced using the blank plate 10 provided with the concave embossed portion 553 shown in FIG. 14C, which corresponds to the first aspect of the third embodiment. Similar concave embossed portions 553 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 12>
In this example, using the blank plate 10 corresponding to the first aspect of the fifth embodiment, in which the concave embossed portions 553 shown in FIG. 90 were made. Similar convex embossments 556 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 13>
In this example, using a blank plate 10 provided with concave embossed portions 553 and concave vertical ruled lines 552 shown in FIG. 90 were made. Similar recessed embossed portions 553 and recessed vertical ruled lines 552 were provided on the front side blank plate 10b and the back side blank plate 10a.
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 14>
In this embodiment, the concave embossed portion 553 shown in FIG. 14D, which corresponds to the second aspect of the fifth embodiment, is changed to a convex embossed portion 556, and the concave vertical ruled line 552 is replaced by a convex vertical ruled line. Using the blank plate 10 changed to 555, a zippered paper container 90 was produced. Similar convex embossed portions 556 and convex vertical ruled lines 555 were provided on the front side blank plate 10b and the back side blank plate 10a.
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.
The outer size of the finished paper container 80 with zipper is substantially the same as that of the embodiment.

The other layer structure of the laminated sheets of the blank plate 81, the method of manufacturing the paper container 80 with a zipper, and the like were the same as those of the first embodiment.

<Evaluation>
Fifty samples each of Examples 1 to 12 and Comparative Example were produced. The contents were filled with snacks.

All samples can be easily opened by notches provided on the top side plate as an initial unsealing means and easy-to-open processing lines provided on the upper overlapping plate and the top side plate. It was possible to open by cutting off the upper seal part.
Next, the front side opening gripping margin between the front side easy opening processing line and the front side zipper tape, and the back side opening gripping margin between the back side easy opening processing line and the back side zipper tape were grasped with fingers of a person and spread in the direction of the outer side of the zippered paper container.

At that time, in the zippered paper containers 90 of Examples 1 to 12, an opening opening gap 58 was generated between the front side opening gripping margin 57b and the back side opening gripping margin 57a. A finger could be easily inserted into the unsealing gap 58, and the zipper tape 61 was easily released.

In the zippered paper container 90 of the comparative example, there was no gap between the gripping margin for opening the front side and the gripping margin for opening the back side. Therefore, it is not easy to insert a finger between the gripping margin for opening the front side and the gripping margin for opening the back side. In order to open the zipper tape 61, the zipper tape 61 was separated by inserting a finger nail between the front side opening gripping margin and the back side opening gripping margin and prying it open, or by inserting a flat plate-shaped tool. sometimes required time.

In addition, the packages of the zippered paper containers 90 of Examples 1 to 12 from which the zipper tape 61 was released as described above were tested for suitability for taking out the contents and resealing performance with a zipper.

The engagement of the zipper tape 61 was easily released, and the upper portion of the paper container 90 with a zipper was opened over substantially the entire width, forming the take-out opening 56 . The snacks filled inside could be easily taken out through the take-out opening 56 .

Moreover, after part of the contents were taken out, the zipper tapes 61 were easily refitted and resealed in the packages of the zippered paper containers 90 of Examples 1 to 12. FIG. The remaining contents were then properly preserved.

Furthermore, the chuck-equipped paper container 90 of the present disclosure satisfies 51% by mass or more, which is the standard for a paper container, in terms of the mass ratio of paper to the overall weight of the chuck-equipped paper container 90 .

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 Top seal portion 55 Unsealing portion 551 Concave horizontal ruled line 552 Concave vertical ruled line 553 Concave embossed portion 554 Convex horizontal ruled line 555 Convex vertical ruled line 556 Convex embossed portion 56 Removal opening 57 Unseal grip 58 Unsealing opening gap 61 Zipper tape 63 Zipper tape fitting part 71 Top part of paper container with zipper 72 Body part of paper container with zipper 72d Ridge part of body part 73 Bottom part 74 of paper container with zipper Top side projecting part 75 Bottom Side Projection 76 Top Side Projection Bent 77 Notch 78 Laminated Sheet 781 Outermost Thermoplastic Resin Layer 782 Paper Base Layer 783 Innermost Thermoplastic Resin Layer 784 Intermediate Adhesive Layer 785 Barrier Layer 788 Paper substrate protective layer 80 Conventional paper container with zipper 81 Blank plate 81a Back side blank plate 81b Front side blank plate 812 First vertical folding line 813 Second vertical folding line 821 Intermediate horizontal folding line (half folding line )
831 wall plate 836 side edge sealing margin 834 upper overlapping plate 851 easy-to-open processing line 856 removal opening 857 opening gripping margin 861 zipper tape 90 paper container with zipper of the present disclosure 91 with intermediate stage zipper of the present disclosure Paper container (flat state)
92 Paper container with zipper in the intermediate stage of the present disclosure (folding state)
93 Zippered paper container with top seal removed of the present disclosure

A Enlarged view of paper container with zipper in intermediate stage (folded state) B Cut surface of easy-to-open processing line of paper container with zipper with upper seal part removed
Observation direction of (indicated by the arrow in the figure)
C Cutting position of the enlarged cross-sectional view of the zipper 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)

Claims (11)

In a zippered paper container in which a blank plate made of a laminated sheet containing a paper base layer is assembled,
The blank plate includes at least a front side blank plate and a back side blank plate,
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;
A zipper-equipped paper container comprising an unsealing part on the upper edge of the zipper tape of at least one of the front side blank plate or the back side blank plate. 2. The paper container with a zipper according to claim 1, wherein the upper edges of the zipper tapes of both the front side blank plate and the back side blank plate are provided with an opening trigger portion. 3. The zipper-equipped paper container according to claim 1, wherein the unsealing part is a ruled line. 4. The zippered paper container according to claim 3, wherein the ruled lines of the opening part include ruled lines that are concave when viewed from the outside of the zippered paper container. 5. The zipper-equipped paper container according to claim 3 or 4, wherein the ruled lines of the opening start portion include convex ruled lines when viewed from the outside of the zipper-equipped paper container. The zippered paper container according to any one of claims 3 to 5, wherein the opening trigger portion includes a horizontal ruled line extending in the horizontal direction of the zippered paper container. 7. The zippered paper container according to claim 6, wherein the opening trigger portion includes two or more horizontal ruled lines. The zippered paper container according to any one of claims 3 to 7, wherein the opening trigger portion includes a vertical ruled line extending in the longitudinal direction of the zippered paper container. The opening trigger portion includes two or more vertical ruled lines extending in the longitudinal direction of the zippered paper container,
9. The zippered paper container according to claim 8, wherein said vertical creases are mutually positioned in the lateral direction of the zippered paper container. The zippered paper container according to any one of claims 1 to 9, wherein the opening trigger portion includes a recessed embossed portion that is recessed in the outer side direction of the zippered paper container. The zippered paper container according to any one of claims 1 to 10, wherein the opening trigger portion includes a convex embossed portion that protrudes toward the outer side of the zippered paper container.

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