JP2022155765A - Zippered paper container - Google Patents

Abstract

To provide a zippered paper container in which the opening of the zippered paper container can be easily opened when the male and female fitting parts of the zipper tape are disengaged and the zipper tape is opened.MEANS FOR SOLVING THE PROBLEM: In a zippered paper container 90 in which a front side blank plate 10b made of a laminated sheet 78 including a paper base layer 782 and a back side blank plate 10a are assembled, an upper overlapping plate 34 of the zippered paper container 90 is provided with an upper sealing portion 53, an easy-to-open processing line 51, a zipper tape 61, and a first horizontal folding line 22 in order from the upper edge, and the distance between the zipper tape 61 and the first horizontal folding line 22 is 20 mm or less.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 zippered paper container 80 described in Patent Document 1, when the top portion 871 is opened and the contents are shaken out, the top side projecting portion (ear portion) 874 is first removed from the body portion 872. Then, 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 opening gripping margin of the upper side of the front zipper tape and the opening gripping margin of the upper side of the back zipper tape are gripped with fingers, respectively, and the paper with the zipper is gripped. Open the container in the fore-and-aft direction.
At that time, the top portion 871 may not open smoothly, and the extraction opening 856 may not be opened to a sufficient size.
In addition, the gripping margin for opening is not large enough, and when the zipper tape 861 is opened, the gripping margin for opening may not be sufficiently grasped with fingers. Alternatively, the unsealing gripping margin that has been gripped may slip and come off the finger. Therefore, the zipper tape 861 is difficult to release, and the paper container 80 with zipper is difficult to open.

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;
an easy-to-open processing line 51 positioned below the upper sealing portion 53 and crossing the upper overlapping plate 34 and the side plate 41 of the top portion;
a zipper tape 61 located below the easy-to-open processing line 51 and crossing the upper overlapping plate 34 and the side plate 41 of the top,
The distance between the first horizontal folding line 22 located on the lower side of the upper overlapping plate 34 and the zipper tape 61 is 20 mm or less.

In addition, in the paper container 90 with zipper of the present disclosure,
The distance between the first horizontal folding line 22 located on the lower side of the upper overlapping plate 34 and the zipper tape 61 may be 5 mm or more.

In addition, in the paper container 90 with zipper of the present disclosure,
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;
an easy-to-open processing line 51 positioned below the upper sealing portion 53 and crossing the upper overlapping plate 34 and the side plate 41 of the top portion;
a zipper tape 61 located below the easy-to-open processing line 51 and crossing the upper overlapping plate 34 and the side plate 41 of the top,
The distance between the easy-open processing line 51 and the zipper tape 61 is 5 mm or more.

In addition, in the paper container 90 with zipper of the present disclosure,
The distance between the easy-open processing line 51 and the zipper tape 61 may be 20 mm or less.

According to the embodiment of the present disclosure described above, the following zippered paper container can be provided. That is, when the user opens the zipper tape 61 of the zippered paper container 90, the front side opening gripping margin 57b on the top side of the front side zipper tape 61b and the top side of the back side zipper tape 61a are The back side opening gripping margin 57a on the alligator is grasped by hand, respectively, and the zippered paper container is opened in the front-rear direction (front side and back side direction).
At that time, since the distance between the first horizontal folding line 22 located on the lower side of the upper overlapping plate 34 and the zipper tape 61 is 20 mm or less, which is sufficiently small, the first horizontal folding line 22, In addition, the upper overlapping plate 34 and the top side plate 41 adjacent to the first lateral bending line 22 are deformed so as to bulge outward smoothly. Therefore, the zipper tape 61 can be smoothly opened, and the opening 56 for take-out of a sufficient size can be secured.

In addition, since each opening gripping margin 57 is large enough, the opening gripping margin can be easily gripped with fingers, and the zipper tape 61 can be easily separated. 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 an exploded view of the back shell blank plate 10a used for manufacturing the zippered paper container 90 of the embodiment of the present disclosure. FIG. 4 is a developed view of the front side blank plate 10b used for manufacturing the zippered paper container 90 of the 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. 11. It is an enlarged view of the A section shown in FIG. 11, and is explanatory drawing of length X and Y. FIG. FIG. 10 is an explanatory diagram of damaged wrinkles 89 that occur when the zipper tape 861 of the conventional paper container 80 with a zipper is opened. (It is an enlarged view with reference to the A section shown in FIG. 11.) 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. 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 paper container 90 with a zipper of the present disclosure uses a laminated sheet 78 in which at least paper as a base material is laminated and at least the innermost layer is laminated with a thermoadhesive resin such as polyethylene, and has a rectangular outer shape. In addition, various forming plates necessary for forming the paper container 90 with a zipper are divided by various folding lines provided in the blank plate 10 .

<Embodiment of the Present Disclosure>
<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 the present embodiment uses a laminated sheet 78 in which at least paper as a base material is laminated, and at least the innermost layer is a thermoplastic resin such as polyethylene, and the outer shape is approximately It is formed in a rectangular 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 points. 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 (ruling line processing) of the present embodiment for giving a folding line to the blank plate 10 is performed after the laminated sheet 78 is completed, and then the laminated sheet is supplied to a machine that manufactures the paper container 90 with a zipper. do. Alternatively, the creasing process may be performed by a machine that manufactures the paper container 90 with a zipper.

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

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

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

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.

5 also shows the first distance X as the distance between the easy-to-open processing line 51 and the zipper tape 61. As shown in FIG. Also, the interval between the zipper tape 61 and the first horizontal folding line 22 is shown as the second distance Y. As shown in FIG.
Here, the reference position for calculating the distance (interval) is the center of the width (the length in the longitudinal direction and the orthogonal direction) of each element.

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. Lines 51 and zipper tape joints 52 are provided in sequence starting 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.

Moreover, it is desirable that the easy-open processing line 51 is substantially parallel to the upper edge portion 21 .
In such a form, cutting of the easy-open processing line 51 is facilitated. Moreover, the length of the easy-open processing line 51 can be shortened.

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

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

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

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

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

Furthermore, the expected opening line may be displayed by printing instead of providing the easy-to-open processing line 51 as a processing line. In that case, the portion may be opened with a knife such as scissors. Moreover, the printing position may be printed at the position of the easy-open processing line 51 shown in FIGS. 4A and 4B.

<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. 15A and 15B).

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

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

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

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

The paper base layer 782 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 laminated sheet 78, the barrier layer 785 may be a metal foil such as aluminum foil, a metal such as aluminum, silica, alumina, or an inorganic oxide biaxially stretched polyethylene terephthalate film ( PET film), biaxially oriented nylon film (ONy film), biaxially oriented polypropylene film (OPP film), and the like 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.

Here, the shape of the upper stacking plate 34 and the shape of the top side plate 41 of the paper container 90 with zipper according to the present embodiment will be described with reference to FIG.
Side plates 41 of the top are continuously provided on both left and right sides of the upper overlapping plate 34 . These three forming plates are collectively referred to as a top flap 45 here. The top flap 45 is provided with an upper seal portion 53, an easy-to-open processing line 51, and a zipper tape 61 in this order from the upper edge portion 21, and the lower side of the zipper tape 61 is provided with a first horizontal fold. Line 22 is located.

A first distance X between the easy-open processing line 51 and the zipper tape 61 and a second distance Y between the zipper tape 61 and the first horizontal folding line 22 are also shown. The first distance X and the second distance Y will be explained later.

Incidentally, FIGS. 15A and 15B show enlarged cross-sectional views of the joining portion of the zipper tape 61, which is the portion where the zipper tape 61 and the blank plate 10 are joined, in the zipper-equipped paper container (flat state) 91 in the intermediate stage. The cut point is shown at the cross-sectional position CC in FIG. Here, the blank plate 10 is exemplified by the four layer laminate sheet 78 of FIG. 12D.

In FIG. 15A, 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. 15B, 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. Extending forward and backward along the line 22, a top flap 45 consisting of the upper overlapping plate 34 and the top side plate 41 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.
When the intermediate-stage zipper-equipped paper container (folded state) 92 is produced, both the front side first horizontal folding line 22b and the back side first horizontal folding line 22a are valley-folded, and the top flap 45 is folded. stand up.

<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. When the top side protruding portion 74 is lifted upward, the top side side plate 41 rises, and the upper overlapping plate 34 also rises accordingly. The top side plate 41 and the upper overlapping plate 34 are substantially flush with each other. Together, the top side plate 41 and the top side plate 41, which are substantially coplanar, are referred to as the top flap 45 as previously described.

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.
Further, the top flap 45 is cut along the easy-open processing line 51, and the portion left behind the first horizontal folding line 22 is called a top flap 46 after cutting.

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 unsealable gripping margins 57a with the fingers of a person's hands and expanding the zippered paper container 90 in the direction of the outer edge. 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.

11 and 12 for the first distance X between the easy-open processing line 51 and the zipper tape 60 and the second distance Y between the zipper tape 60 and the first horizontal folding line 22. will be used for explanation. FIG. 12 is an enlarged view of part A shown in FIG.
The first distance X is defined by the width direction of the easy-open processing line 51 (the direction orthogonal to the longitudinal direction of the easy-open processing line 51) and the center portion of the width of the zipper tape 61 (the direction orthogonal to the longitudinal direction of the zipper tape 61). is the distance (interval) between
The second distance Y is the center of the width of the zipper tape 61 (the direction orthogonal to the longitudinal direction of the zipper tape 61) and the center of the width of the first horizontal folding line 22 (the direction orthogonal to the longitudinal direction of the zipper tape 61). It is the distance (interval) to the part.
The sum of the first distance X and the second distance Y is the longitudinal length of the resected top flap 46 described above.

The size of the first distance X affects the ease of gripping the opening gripping margin 57 with fingers. When the zipper tape 61 is unsealed, the position to be gripped by the fingers is approximately the central portion of the lateral width of the zipper-equipped paper container 90, so the first distance X within the following range is important. be.
That is, the range of 70 mm to the left and right with respect to the center of the width of the paper container 90 with a zipper, or the area between the left and right second vertical folding lines 13, whichever is narrower, is easier to grasp. can be viewed as a range that contributes to
At least the first distance X is desirably 5 mm or more so that the fingers of the hand can effectively grip the opening gripping margin 57 . When the first distance X is 5 mm or more, fingers can effectively grip the opening gripping margin 57 in order to open the zipper tape 61 .

If the first distance X exceeds 20 mm, the laminated sheets of the zippered paper container 80 are wasted, and when the zippered paper container 80 is completed, the upper edge largely protrudes from the back wall panel. As a result, the upper edge may be damaged when the zippered paper container 80 is transported. In addition, when a plurality of paper containers with zippers 80 are transported, there are cases where adjacent containers cannot be brought into close contact with each other, resulting in poor transport efficiency (space efficiency).

The size of the second distance Y influences whether the zipper tape 61 can be released and the opening 56 can be smoothly expanded.
When the zipper tape 61 is released and the take-out opening 56 is widened, desirably, the top flap 46 after excision, as shown in FIG. That is.

When the second distance Y exceeds 20 mm, the zipper tape 861 is released, and when the take-out opening 856 is widened, the first horizontal folding line near the substantially central portion of the lateral width of the zipper-equipped paper container 90 is bent. 822 may be deformed into a valley fold when seen from the outside. In such a state, as the take-out opening 856 is widened, the valley fold of the first horizontal folding line 822 advances, and the take-out opening 856 cannot be widened.

In the above situation, damage may also occur between the zipper tape 861 and the first transverse fold line 822 . A typical lesion is damage wrinkles 89 shown in FIG. 13, which is enlargement A shown in FIG. 11, with damage wrinkles 89 in the longitudinal direction. However, the form of damage is not limited to the damaged wrinkles 89 . Damaged wrinkles 89 are likely to occur in substantially the center of the left-right width of the paper container 90 with a zipper.
Although FIG. 11 is a drawing of the present embodiment, it is also used to explain damage wrinkles 89 that occur in the paper container 80 with a zipper of the prior art.

In addition, in the process of manufacturing the paper container 80 with a zipper, the top flap may be tilted toward the back side as the side edge seal allowance 836 is pushed down toward the back side. In that case, the first horizontal folding line 822a of the back side forms an acute valley fold when viewed from the outside. When widening the take-out opening 856, the valley fold is flattened at the first lateral fold line 822a of the back side, and then deformed so as to bulge outward. However, in some cases, the valley fold cannot be smoothly flattened, and if the take-out opening 856 is widened in this state, the valley fold of the first lateral fold line 822a of the back side becomes even deeper.
Although the above shows an example in which the valley fold occurs at the first lateral fold line 822a of the back side, the valley fold may occur at the first lateral fold line 822b of the front side.

The second distance Y is desirably 20 mm or less in order to prevent valley folds from occurring on the first lateral fold line 22 . It is more desirably 10 mm or less, and by doing so, it is possible to make it more difficult for valley folds to occur along the first lateral fold line 22 . When the second distance Y is small, the first horizontal folding line 22 is positioned within the range affected by the hardness of the zipper tape 61 , so that the laminated sheet 78 in that portion is less likely to bend, and the first horizontal folding line 22 does not bend. Valley folds are less likely to occur.

The second distance Y is desirably 5 mm or more. If the second distance Y is less than 5 mm, the zipper tape body portion 62 of the zipper tape 61 and the first horizontal folding line 22 may interfere with each other, which may hinder the folding of the first horizontal folding line 22 . Therefore, when forming the paper container 90 with a zipper, there is a possibility that the formation of the top portion 71 may be hindered. More desirably, the second distance Y is 7 mm or more. By doing so, interference between the zipper tape body portion 62 of the zipper tape 61 and the first horizontal folding line 22 can be reliably prevented.

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

<Example 1>
In Example 1, the paper container 90 with a zipper shown in FIG. 7 was produced using the blank plate 10 shown in FIGS. 4A and 4B corresponding to this embodiment.

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.
(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 250 mm and a width of 189 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, which is the upper edge when the two blank plates 10 are overlapped, is positioned 15 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.

A zipper tape 61 was heat-sealed to the inner surfaces of the upper overlapping plate 34 and the top side plate 41 below the easy-to-open processing line 51 in a direction across the top portion 71 . Here, the first distance X between the easy-open processing line 51 and the zipper tape 61 was 5 mm.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 20 mm.

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

<Example 2>
This example is the same as Example 1, except that the positions of the easy-open processing lines 51 and the positions of the zipper tapes 61 are different.

That is, at a position 15 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. was taken.

In addition, under the easy-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 20 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 5 mm.

<Example 3>
In this example, the dimensions of the back side blank plate 10a and the front side blank plate 10b were rectangular with a length of 255 mm and a width of 189 mm. In this 5 mm, the length of the top flap 45 in the vertical direction is increased by about 5 mm, and the size of each other forming plate remains unchanged. Moreover, it was the same as Example 1 except that the top flap 45 was different.

That is, at a position 5 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. was taken.

In addition, under the easy-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 20 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 20 mm.
In this embodiment, the upper edge portion 21 protrudes outward (in the direction of the back side) by about 5 mm from the back side wall plate 31a.

<Example 4>
In this example, the dimensions of the back side blank plate 10a and the front side blank plate 10b were rectangular with a length of 225 mm and a width of 189 mm. With this 25 mm, the length of the top flap 45 in the vertical direction is shortened by about 25 mm, and the sizes of the other formation plates are unchanged. Moreover, it was the same as Example 1 except that the top flap 45 was different.

That is, at a position 5 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. was taken.

Under the easy-to-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 5 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 5 mm.
In this embodiment, the upper edge portion 21 is recessed about 25 mm toward the inner side (front side direction) from the back side wall panel 31a.

<Comparative example>
<Comparative Example 1>
In this comparative example, the dimensions of the back side blank plate 10a and the front side blank plate 10b were rectangular with a length of 250 mm and a width of 169 mm, which were the same as in Example 1.

At a position 25 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. .

In addition, under the easy-to-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 3 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 12 mm.

<Comparative Example 2>
In this comparative example, the dimensions of the back side blank plate 10a and the front side blank plate 10b were rectangular with a length of 250 mm and a width of 169 mm, which were the same as in Example 1.

At a position 25 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. .

In addition, under the easy-to-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 12 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 3 mm.

<Comparative Example 3>
In this comparative example, the dimensions of the back side blank plate 10a and the front side blank plate 10b were rectangular with a length of 270 mm and a width of 189 mm. With this 20 mm, the length of the top flap 45 in the vertical direction is increased by about 20 mm, and the sizes of the other forming plates are unchanged. Moreover, it was the same as Example 1 except that the top flap 45 was different.

At a position 10 mm below the upper edge 21 of the paper container 90 with a zipper, as shown in FIG. .

In addition, under the easy-open processing line 51, a zipper tape 61 is attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a first distance X of 25 mm. The top portion 71 of the container 90 is configured to be heat-sealed in the transverse direction.
A second distance Y between the zipper tape 61 and the second horizontal folding line 23 was 25 mm.
In this embodiment, the upper edge portion 21 protrudes outward (in the direction of the back side) by about 20 mm from the back side wall panel 31a.

<Evaluation>
Fifty samples each of Examples 1 to 4 and Comparative Examples 1 to 3 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. I was able to cut off the top seal.
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 4, the user was able to sufficiently grip the opening gripping margin 57, so that the zipper tape 61 was separated.

In addition, in the zippered paper containers 90 of Examples 1 to 4, when the zipper tape 61 was released and the take-out opening 56 was widened, the top flap 46 after cutting was able to bulge outward smoothly. . Furthermore, the first horizontal folding line 22 was not folded in a valley when viewed from the outside. Therefore, the opening 56 for extraction of sufficient size was able to be secured.
Also, no damage (as an example, damage wrinkles 89) occurred in the upper overlapping plate 34 between the zipper tape 61 and the first horizontal folding line 22 .

In the zipper-equipped paper container 80 of Comparative Example 1, an opening gripping margin of a sufficient size was not formed, so the opening gripping margin could not be sufficiently gripped with fingers, and the zipper tape 861 was smoothly released. I couldn't.

In the zipper-equipped paper container 80 of Comparative Example 2, the zipper tape 861 and the first horizontal folding line 822 interfered with each other. A problem occurred when bending.

In the zipper-equipped paper container 80 of Comparative Example 3, the upper edge of the zipper-equipped paper container 80 largely protruded outward (in the direction of the back) from the back wall plate. For this reason, when transporting a plurality of paper containers 80, they could not be brought close to or in close contact with each other, resulting in poor transport space efficiency. In addition, since the amount of protrusion of the upper edge is large, the upper edge is likely to be damaged during transportation, and a large external force is applied to the top flap. There were times when it came off from the body part 872 .

In Comparative Example 3, the second distance Y was as large as 25 mm. The top flap after resection was not able to bulge out smoothly.

The packages of the zippered paper containers 90 of Examples 1 to 4, in 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 content was taken out, the zipper tape 61 was easily refitted and resealed in the packages of the zippered paper containers 90 of Examples 1 to 4. 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 45 Top Flap 46 Top flap after excision 51 Easy-to-open processing line 52 Zipper tape joining portion 53 Upper seal portion 56 Extraction opening 57 Opening grip margin 61 Zipper tape 62 Zipper tape body 63 Zipper tape fitting portion 71 Top of paper container with zipper Part 72 Body of paper container with zipper 72d Edge of body 73 Bottom of paper container with zipper 74 Top side protrusion 75 Bottom side protrusion 76 Top side protrusion bent part 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 base protective layer 80 Conventional paper container with zipper 81 Blank plate 81a Backing Blank plate 81b Front side blank plate 812 First vertical folding line 821 Intermediate horizontal folding line (half folding line)
831 wall plate 833 top plate 834 upper stacking plate 835 bottom plate 836 side edge sealing margin 851 easy-to-open processing line 856 removal opening 861 zipper tape 871 top of paper container with zipper 872 body of paper container with zipper Part 873 Zippered paper container bottom 89 Damage wrinkles 90 Zippered paper container 91 of the present disclosure Intermediate zippered paper container of the present disclosure (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 front side upper overlapping plate of unsealed zippered paper container C: Enlarged cross-sectional view of 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)

X First distance between the easy-open processing line and the zipper tape Y Second distance between the zipper tape and the first horizontal folding line

Claims (4)

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;
an easy-to-open processing line located below the upper sealing portion and crossing the upper overlapping plate and the side plate of the top portion;
a zipper tape located below the easy-to-open processing line and crossing the upper overlapping plate and the side plate of the top,
A paper container with a zipper, wherein the distance between the first horizontal folding line located on the lower side of the upper overlapping plate and the zipper tape is 20 mm or less. 2. The paper container with zipper according to claim 1, wherein the distance between the first horizontal folding line located on the lower side of said upper overlapping plate and said zipper tape is 5 mm or more. 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;
an easy-to-open processing line located below the upper seal portion and crossing the upper overlapping plate and the side plate of the top portion;
a zipper tape located below the easy-to-open processing line and crossing the upper overlapping plate and the side plate of the top,
A paper container with a zipper, wherein the distance between the easy-open processing line and the zipper tape is 5 mm or more. 4. The zipper-equipped paper container according to claim 3, wherein the distance between the easy-open processing line and the zipper tape is 20 mm or less.

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