Zippered paper container

Abstract

To provide a paper container with a chuck whose chuck tape is easily opened when a user subsequently opens the chuck tape after opening means is initially opened.SOLUTION: A paper container with a chuck in which a front side blank plate and a back side blank plate made of a lamination sheet including a paper base material layer are assembled is provided with: an opening gripping margin 57 provided on an upper edge part 21 of an upper overlapping plate 34 and a side plate 41 of a top part; an easy-to-open seal part 53 located below the opening gripping margin 57 and crossing the upper overlapping plate 34 and the side plate 41 of the top part; and a chuck tape 61 located under an upper sealing part 53 and crossing the upper overlapping plate 34 and the side plate 41 of the top part.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a paper container with a chuck, and particularly in the field of paper containers having a three-dimensional shape and self-standing property, when the male and female fitting parts of the chuck tape are dissociated and the chuck tape is opened, it relates to a paper container with a chuck that is easy to open the opening of the paper container with a chuck.

Background Art

[0002] Conventionally, as a paper container with a chuck, a technique such as Patent Document 1 has been disclosed. That is, a chuck is provided at the upper part of a rectangular parallelepiped paper container, and when taking out the contents, the chuck can be opened, and when the taking out of the contents is finished, the chuck can be closed.

[0003] With the above technique, it is possible to protect the contents and prevent the contents from spilling when the paper container is overturned. Also, since it is a paper container, it is easy to reduce the volume of the container after consuming the contents and to discard it. FIG. 1 shows a blank plate 81 used for manufacturing a conventional paper container 80 with a chuck, FIG. 2 shows a perspective view of the conventional paper container 80 with a chuck, and FIG. 3 shows a perspective view in a state where the top part is opened.

[0004] In addition, when there is no special explanation hereafter, referring to FIG. 2, with the outer wall panel 831b of the front side as the front, the front, back, left, right, top, and bottom of the paper container 80 with a chuck are shown. The same shall apply to the paper container 90 with a chuck of the present disclosure.

[0005] Also, in order to distinguish from the present disclosure, the reference numerals used when explaining the prior art are in the 80s or 800s. Also, the subscript a of the reference numeral indicates an element of the back side part of the paper container 80 with a chuck, and the subscript b indicates an element of the front side part. In an element having both subscripts a and b, the reference numeral without a subscript includes both a and b.

[0006] In the resealable paper container 80 described in Patent Document 1, when opening the top 871 and shaking out the contents, first the top protrusion 874 is removed from the body 872, then the easy-open processing line 851 is cut, and then the male and female fitting parts of the resealable tape 861 are separated, opening the dispensing opening 856 (see Figure 3). Then, the contents are removed through the removal opening 856.

[0007] In the manufacturing process of the resealable paper container 80, there is a step in which the intermediate horizontal fold line 821 of the blank plate 81 is folded, but there was a risk that the nearby easy-open processing line 851 would be accidentally folded. Furthermore, the easy-open processing line 851 is a weak point in the blank plate, and if the easy-open processing line 851 is accidentally folded in other manufacturing processes as well, it becomes difficult to manufacture the resealable paper container 80, and the blank plate 81 becomes a defective product and is discarded. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2005-178833 [Overview of the project] [Problems that the invention aims to solve]

[0009] This disclosure was made to solve the above-mentioned problems, and in the resealable paper container 90, an opening means is used as a means of initial opening instead of an easy-open processing line. The objective is to provide a resealable paper container 90 in which the number of failures during the manufacturing of the resealable paper container 90 is reduced and the loss of blank plates 10 is reduced. Furthermore, the present invention provides a resealable paper container 90 that is easy for the user to open when initially opening the resealable paper container 90 with their fingers. As described above, after the opening means has been initially opened, the present invention provides a resealable paper container 90 in which the resealable tape 61 is easily opened when the user subsequently opens the resealable tape 61. [Means for solving the problem]

[0010] The above-mentioned problems can be solved by the following embodiments of this disclosure. In other words, the resealable paper container 90 of this disclosure is In a resealable paper container 90, a blank plate 10 consisting of a laminated sheet 78 including a paper base material layer 782 is assembled, The blank plate 10 includes at least a front blank plate 10b and a back blank plate 10a. The top of the resealable paper container 90 is a top section 71 consisting of an upper overlapping plate 34 formed by overlapping and joining the front blank plate 10b and the back blank plate 10a, and a top plate 33 connected to the bottom of the upper overlapping plate 34. The top side panels 41 are connected to both the left and right sides of the upper overlapping plate 34, The top portion 71 has top portion projections 74 connected to both the left and right sides, The torso portion 72 is located below the aforementioned top portion 71, The bottom portion 73 provided below the body portion 72, An opening gripping tab 57 is provided on the upper edge 21 of the upper overlapping plate 34 and the upper side plate 41 of the top part, Located below the opening grip 57, the easy-open seal portion 53 crosses the upper overlapping plate 34 and the top side plate 41, The device includes a chuck tape 61 located below the easy-open seal portion 53, which crosses the upper overlapping plate 34 and the top side plate 41.

[0011] Furthermore, in the resealable paper container 90 of this disclosure, The distance between the first horizontal fold line 22 located below the upper overlapping plate 34 and the chuck tape 61 may be 20 mm or less.

[0012] Also, in the paper container 90 with a chuck of the present disclosure, the distance between the first horizontal folding line 22 located below the upper overlapping plate 34 and the chuck tape 61 may be 5 mm or more.

[0013] Also, in the paper container 90 with a chuck of the present disclosure, the vertical length of the unsealing grip margin 57 may be 5 mm or more.

[0014] Also, in the paper container 90 with a chuck of the present disclosure, the vertical length of the unsealing grip margin 57 may be 20 mm or less.

Advantages of the Invention

[0015] According to the above-described embodiment of the present disclosure, the problem is solved by using an easy-opening seal portion 53 as an opening means instead of an easy-opening processing line as an initial opening means in the paper container 90 with a chuck. By using the easy-opening seal portion 53, when the paper container 90 with a chuck is manufactured, the number of failures is reduced and the loss of the blank plate 10 is reduced. Furthermore, when a user initially opens the easy-opening seal portion 53 of the paper container 90 with a chuck with a finger, a paper container 90 with a chuck that is easy to open is provided. Also, after the easy-opening seal portion 53 is initially opened as described above, when the user subsequently opens the chuck tape 61, a paper container 90 with a chuck that is easy to open the chuck tape 61 is provided.

Brief Description of the Drawings

[0016] [Figure 1] It is a developed view of a blank plate 81 used for manufacturing a conventional paper container 80 with a chuck. [Figure 2] It is a perspective view of a conventional paper container 80 with a chuck. [Figure 3] It is a perspective view of the paper container 80 with a chuck shown in FIG. 2 with the top portion 871 opened. [Figure 4A]This is an unfolded view of the back blank plate 10a used in the manufacture of the zippered paper container 90 according to the embodiment of the present disclosure. [Figure 4B] This is an unfolded view of the front blank plate 10b used in the manufacture of the zippered paper container 90 according to the embodiment of the present disclosure. [Figure 5] Figures 4A and 4B show a front view illustrating the shape of the paper container (flat state) 91 in an intermediate stage when manufacturing a paper container 90 with a zipper using the blank plate 10. [Figure 6] Figures 4A and 4B show a perspective view of the shape of the paper container (assembled) 92 at an intermediate stage when manufacturing a zippered paper container 90 using the blank plate 10 shown in Figures 4A and 4B. [Figure 7] Figures 4A and 4B show perspective views of a resealable paper container 90 made using the blank plate 10. [Figure 8] Figure 7 is a side view of the resealable paper container 90. [Figure 9] Figure 7 is a plan view of the resealable paper container 90. [Figure 10] This is a perspective view of a resealable paper container 93 with an open top 71. [Figure 11] Figure 10 is an enlarged view of section B, and is an explanatory diagram of the first distance X, the second distance Y, and the third distance Z. [Figure 12] This is an explanatory diagram of the damage and wrinkles 89 that occur when opening the zipper tape 861 of a conventional resealable paper container 80. (This is an enlarged view based on part B shown in Figure 10.) [Figure 13A] This is an enlarged view of section A in Figure 5, and is an explanatory diagram of one embodiment of the easily peelable section 54. [Figure 13B] This is an enlarged view of section A in Figure 5, illustrating another embodiment of the easily peelable section 54. [Figure 13C] This is an enlarged view of section A in Figure 5, illustrating yet another embodiment of the easily peelable section 54. [Figure 13D] This is an enlarged view of section A in Figure 5, illustrating yet another embodiment of the easily peelable section 54. [Figure 14A] This is a cross-sectional view of a laminated sheet 78 in one aspect of the blank plate 10. [Figure 14B] This is a cross-sectional view of a laminated sheet 78 in another embodiment of the blank plate 10. [Figure 14C] This is a cross-sectional view of a laminated sheet 78 in yet another embodiment of the blank plate 10. [Figure 14D] This is a cross-sectional view of a laminated sheet 78 in yet another embodiment of the blank plate 10. [Figure 15A] This is an enlarged cross-sectional view of one aspect of the joint between the blank plate 10 and the chuck tape 61. (See Figure 5, section CC.) [Figure 15B] This is an enlarged cross-sectional view of another aspect of the joint between the blank plate 10 and the chuck tape 61. (See Figure 5, section CC.) [Modes for carrying out the invention]

[0017] The present disclosure will be explained below with reference to the drawings. However, this disclosure is not limited to these specifically shown forms or the various specifically described structures. Please note that in each diagram, the size and proportions of the components may be altered or exaggerated for clarity. Also, unnecessary or repetitive symbols may be omitted for readability.

[0018] Furthermore, the numerical values ​​such as dimensions and material names of each component described herein are merely examples of embodiments and are not limiting; they can be selected and used as appropriate. In this specification, terms that specify shapes and geometric conditions, such as parallel, orthogonal, and perpendicular, are used not only in their strict sense but also to include substantially the same conditions.

[0019] The blank plate 10 of the resealable paper container 90 of this disclosure is formed in a rectangular shape using a laminated sheet 78 in which at least a base paper is laminated and at least a thermoplastic resin such as polyethylene is laminated as the innermost layer, and various folding lines provided in the blank plate 10 divide the forming plates of each part necessary for forming the resealable paper container 90.

[0020] <First aspect of the embodiments of this disclosure> <Blank plate> The blank plates 10 of the zippered paper container 90 of this embodiment are shown in Figures 4A and 4B. Figure 4A shows the back blank plate 10a, and Figure 4B shows the front blank plate 10b. The two blank plates, the back blank plate 10a and the front blank plate 10b, are collectively referred to as the blank plate 10.

[0021] Furthermore, unless otherwise specified, in each component of the blank plate 10 described later, the subscript 'a' of each symbol indicates an element of the back blank plate 10a, and the subscript 'b' indicates an element of the front blank plate 10b. In elements that have both subscripts 'a' and 'b', symbols without subscripts are assumed to include both 'a' and 'b'.

[0022] The upper back edge 21a, which is the lower side of the back blank plate 10a in Figure 4A, becomes the upper side of the zippered paper container 90. The upper edge 21b of the front blank plate 10b in Figure 4B is the top of the zippered paper container 90.

[0023] In both Figure 4A and Figure 4B, the front side of the drawing represents the outer surface of the assembled zippered paper container 90, and the back side represents the inner surface. Figures 4A and 4B are symmetrical with respect to their respective upper edges 21a and 21b. When the inner surfaces of the back blank plate 10a and the front blank plate 10b are aligned and superimposed, each component (such as the molded plates, lines, sealing parts, and chuck tape joints described later) overlaps.

[0024] The aforementioned back blank plate 10a and front blank plate 10b, which are aligned and stacked, are joined together to create an intermediate zippered paper container (flat state) 91 as shown in Figure 5. Further, an intermediate zippered paper container (folded state) 92 as shown in Figure 6 is created, and the process proceeds toward the completion of the zippered paper container 90. This manufacturing method will be described later.

[0025] Unless otherwise specified, Figure 4B will be used to indicate the top, bottom, left, and right sides of the front blank plate 10b. The back blank plate 10a will also be described with its upper edge 21a as the top. Therefore, in Figure 4A, the top and bottom are reversed. In the resealable paper container 90, the upper edge 21 is considered the upper side, and the lower edge 26 is considered the lower side.

[0026] The formed resealable paper container 90, as will be explained later, is composed of a top section 71, a body section 72, and a bottom section 73, in that order from the top. The top section is sometimes referred to as the top section, and the bottom section as the bottom section. (See Figure 7). Furthermore, when describing the vertical direction of each component provided on the top portion 71, the term "top portion" may refer to the upper edge portion 21, and when describing the vertical direction of each component provided on the bottom portion 73, the term "bottom portion" may refer to the lower edge portion 26.

[0027] As described above, the back blank plate 10a and the front blank plate 10b are almost symmetrical in shape vertically, so the explanation of the blank plate 10 will be given using the front blank plate 10b. Furthermore, the back blank plate 10a and the front blank plate 10b are made of the same material (layer structure) and manufactured using the same method.

[0028] The front blank plate 10b of the zippered paper container 90 in this embodiment is formed in a substantially rectangular shape using a laminated sheet 78 which is made by laminating at least a base paper and laminating at least a thermoplastic resin such as polyethylene as the innermost layer. Referring to Figure 4B, the top is the front upper edge portion 21b, both the left and right sides are the front side edges portion 11b, and the bottom is the front lower edge portion 26b. Furthermore, the front blank plate 10b has a symmetrical shape with respect to a vertical line passing through its center in the width direction as the axis of symmetry. The laminated sheet 78 will be explained later.

[0029] The front blank plate 10b is provided with, in order from the upper edge 21b of the front surface, a first transverse fold line 22b, a second transverse fold line 23b, a third transverse fold line 24b, and a fourth transverse fold line 25b, all located in the transverse direction. It is desirable that the transverse fold lines 22b, 23b, 24b, and 25b on the front surface are parallel to the upper edge 21b and the lower edge 26b on the front surface, respectively.

[0030] The front blank plate 10b is provided with, in order from the left, a first front vertical fold line 12b, a second front vertical fold line 13b, a second front vertical fold line 13b, and a first front vertical fold line 12b. In other words, the vertical fold line on the side edge 11b of each front blank plate 10b is the first front vertical fold line 12b, and the vertical fold line on the side edge 11b of each front blank plate 10b is the second front vertical fold line 13b. It is desirable that the vertical fold lines 12b and 13b on the front side are approximately parallel to the side edge 11b of the front blank plate 10b.

[0031] Furthermore, a pair of diagonal fold lines 17b on the top of the front surface and a pair of diagonal fold lines 18b on the bottom of the front surface are provided on the left and right sides, respectively, and the forming plates for each part necessary for forming the zippered paper container 90 are partitioned and configured.

[0032] The diagonal fold line 17b on the top of the front surface originates from the intersection point Fb on the top of the front surface, which is the intersection point of the second vertical fold line 13b on the front surface and the second horizontal fold line 23b on the front surface. Furthermore, the diagonal fold line 17b on the top of the front surface connects the above-mentioned second top surface intersection Fb to the first top surface intersection Eb, which is the intersection of the first vertical fold line 12b and the first horizontal fold line 22b on the front surface, and extends further to the side edge 11b on the front surface. The intersection of the side edge 11b on the front surface and the diagonal fold line 17b on the top of the front surface is the endpoint of the diagonal fold line 17b on the top of the front surface.

[0033] The diagonal fold line 18b on the bottom of the front surface originates from the second bottom intersection point Hb on the front surface, which is the intersection point of the second vertical fold line 13b on the front surface and the third horizontal fold line 24b on the front surface. Furthermore, the diagonal fold line 18b on the front bottom connects the above-mentioned second bottom intersection Hb on the front with the first bottom intersection Gb on the front, which is the intersection of the first vertical fold line 12b on the front and the fourth horizontal fold line 25b on the front, and extends further to the side edge 11b on the front. The intersection of the side edge 11b on the front and the diagonal fold line 18b on the front bottom is the endpoint of the diagonal fold line 18b on the front bottom.

[0034] Furthermore, the diagonal fold line 17b on the top of the front surface may not touch the second top intersection Fb on the front surface, but may be located in its vicinity. In addition, the diagonal fold line 18b on the bottom of the front surface may not touch the second bottom intersection Hb on the front surface, but may be located in its vicinity.

[0035] Furthermore, the diagonal fold line 17b on the top of the front surface does not have to touch the first intersection point Eb on the top of the front surface, but may be located in its vicinity. Alternatively, the diagonal fold line 17b on the top of the front surface does not have to exist between the first intersection point Eb on the top of the front surface and the side edge 11b on the front surface. Furthermore, the diagonal fold line 18b on the front bottom does not have to touch the first bottom intersection Gb on the front, but may be located in its vicinity. Alternatively, the diagonal fold line 18b on the front bottom does not have to exist between the first bottom intersection Gb on the front and the front side edge 11b.

[0036] By ensuring that each of the diagonal fold lines on the front side and their respective intersection points are located in close proximity without touching, sufficient bending performance is achieved while preventing excessive concentration of fold lines in specific locations, thereby preventing a decrease in the strength of the laminated sheet of the front blank plate 10b.

[0037] On both the left and right side edges 11b of the front blank plate 10b, a front side edge seal allowance 36b is formed via the front first vertical fold line 12b.

[0038] Furthermore, a front bottom sealing allowance 37b is formed on the front lower edge portion 26b located below the front blank plate 10b, via the front fourth transverse fold line 25b.

[0039] Furthermore, the front blank plate 10b is provided with forming plates for each part sequentially in a downward direction from the upper edge portion 21b of the front surface, which is located at its very top.

[0040] To describe the main parts, a front upper overlapping plate 34b is provided below the central region of the front upper edge portion 21b. Below the front upper overlapping plate 34b, a front top panel 33b is connected via a front first horizontal fold line 22b. Below the front top panel 33b, a front wall panel 31b is connected via a front second horizontal fold line 23b. Below the front wall panel 31b, a front bottom panel 35b is connected via a front third horizontal fold line 24b.

[0041] Furthermore, the side panels 41b of the top of the front surface are connected to the outer sides of both the left and right sides of the upper overlapping front surface panel 34b via the second vertical folding line 13b of the front surface.

[0042] Furthermore, the front top projection 38b is connected to the outer sides of both the left and right sides of the front top panel 33b via the front second vertical folding line 13b.

[0043] Furthermore, the front side panels 32b are connected to the left and right outer sides of the front wall panel 31b via the front second vertical folding line 13b.

[0044] Furthermore, the front bottom protrusions 43b are connected to the outer sides of both the left and right sides of the front bottom plate 35b via the front second vertical folding line 13b.

[0045] Furthermore, a front top projection 38b is attached to the underside of each front top side plate 41b via a front first horizontal fold line 22b. A front side plate 32b is attached to the underside of the front top projection 38b via a front second horizontal fold line 23b. A front bottom projection 43b is attached to the underside of the front side plate 32b via a front third horizontal fold line 24b.

[0046] The bottom sealing portion 37b is continuously provided below the top bottom plate 35b and the top bottom protruding portions 43b on both the left and right sides thereof.

[0047] The side plate 41b of the top of the front surface, the protruding part 38b of the top of the front surface, the side plate 32b of the front surface, and the protruding part 43b of the bottom of the front surface are connected to the outer sides on the left and right sides via the first vertical folding line 12b of the front surface, and the side edge sealing part 36b of the front surface.

[0048] In this embodiment, the process of creating fold lines on the blank plate 10 (creasing) is performed after the laminated sheet 78 is completed, and then the laminated sheet is supplied to the machine that manufactures the zippered paper container 90. Alternatively, the creasing may be performed on the machine that manufactures the zippered paper container 90.

[0049] For the scoring process, an appropriate method will be adopted from known methods such as the platen method and the rotary die method. Alternatively, the laminated sheet 78 may be cut into sheets before the creasing process is carried out. Or, the laminated sheet 78 may be supplied to the creasing process in roll form.

[0050] Next, we will describe the punching process for manufacturing a blank plate 10 by punching out the laminated sheet 78. The punching process can be selected from known methods such as the platen method and the rotary die method. The blank plate 10 may be formed directly from the roll-shaped laminated sheet 78, or the sheet may be cut into individual sheets beforehand before punching. Furthermore, the order of the scoring and die-cutting processes does not matter. They can be processed simultaneously.

[0051] Alternatively, a roll of laminated sheet 78 slit to a predetermined roll width may be supplied to a machine that manufactures a paper container with a zipper 90, where it may be cut in the transverse direction to produce a blank plate 10.

[0052] Furthermore, the back blank plate 10a is identical in shape to the front blank plate 10b, being symmetrical. In other words, it is a blank plate with an almost identical shape, but with the layer configuration reversed.

[0053] Figure 5 is a front view showing the shape of a zippered paper container (flat state) 91 in an intermediate stage when manufacturing a zippered paper container 90 using the blank plate 10 shown in Figures 4A and 4B. The top is the upper edge 21b of the front blank plate 10b shown in Figure 4B, and a back blank plate 10a is provided on the back side. The back blank plate 10a is not visible to the naked eye, but when viewed through, it has almost the same shape as the front blank plate 10b.

[0054] In Figure 5, the back blank plate 10a and the front blank plate 10b overlap, and each component is in the same positional relationship when viewed through the drawing, within the range of manufacturing variations. Therefore, the notation and subscripts on the front side may be omitted in the explanation.

[0055] Furthermore, Figure 5 shows the distance between the upper edge 21 and the top of the easy-open seal portion 53 as the first distance X. Also, the distance between the zipper tape 61 and the first transverse fold line 22 is shown as the second distance Y. Here, the reference position for calculating the distance (spacing) to the zipper tape 61 is the center of the width of the zipper tape 61 (length in the longitudinal direction and the perpendicular direction). In addition, the distance between the upper edge 21 and the top of the zipper tape fitting portion 63 of the zipper tape 61 is shown as the third distance Z.

[0056] On the upper overlapping plate 34 and the side plate 41 of the top surface, an easy-open seal portion 53 and a chuck tape joining portion 52 are provided sequentially from the upper edge 21 at predetermined positions where the two blank plates 10 described above overlap each other, serving as a means of sealing in the transverse direction. The chuck tape joining portion 52 is the corresponding location on the blank plate 10 to which the chuck tape 61 is joined.

[0057] The easy-open seal portion 53 is provided at a position a distance of a first distance X from the upper overlapping plate 34 and the upper edge portions 21 of the left and right top side plates 41. If the easy-open seal portion 53 is approximately parallel to the upper edge portion 21, the length of the easy-open seal portion 53 can be shortened. Furthermore, the area between the upper edge 21 and the easy-open seal portion 53 serves as an opening gripping area 57 for the user to grasp the blank plate 10 with their fingers when opening the easy-open seal portion 53.

[0058] The easy-open seal portion 53, which serves as a transverse sealing means, is formed by joining an opposing front easy-open seal portion 53b and a back easy-open seal portion 53a. This joining is made at a distance of a first distance X from the upper edge 21 of the resealable paper container 90 and spans the entire width, thus maintaining the airtight seal of the resealable paper container 90.

[0059] Furthermore, it is desirable that the chuck tape joint portion 52 be substantially parallel to the upper edge portion 21. In such a configuration, opening and closing the zipper tape 61 and removing the contents become easier. Furthermore, the length of the zipper tape 61 can be shortened.

[0060] <Easy-open seal section> The easy-open seal section 53 will now be explained. The easy-open seal portion 53 has the function of sealing the top portion 71 of the resealable paper container 90. Furthermore, when opening the top portion 71 of the resealable paper container 90 in order to remove the contents, it can be easily peeled off to form an opening 56 for removal. Therefore, the resealable paper container 90 can be opened with the user's fingers without using tools such as scissors.

[0061] For the easy-open seal portion 53 to be easily opened by the user's fingers, the easy-open seal portion 53 must be sealed with an appropriate peel strength (upper limit). Furthermore, to ensure proper airtightness of the contents, it is desirable to have an appropriate peel strength (lower limit). The peel strength is preferably 1 N / 15 mm or more and 20 N / 15 mm or less. To set the appropriate peel strength, an easy-peel processing section 54 is provided on the inner surface of the blank plate 10, at the interface where the easy-open seal section 53 is joined. The easy-peel processing section 54 allows the peel strength of the easy-open seal section 53 to be set appropriately.

[0062] To obtain the easily peelable seal portion 53 having the appropriate peel strength as described above, the easily peelable portion 54 is formed by applying and drying an easy-peel heat-adhesive resin or a resin coating liquid called an anti-heat sealant in a pattern using means such as gravure printing or flexographic printing. If the easily peelable portion 54 is formed with an easy-peel heat-adhesive resin, the easy-peel heat-adhesive resin may be, for example, a resin composition obtained by appropriately mixing a polyolefin resin such as low-density polyethylene or ethylene-vinyl acetate copolymer with additives such as polystyrene, chlorinated polypropylene, polybutene-1, inorganic or organic fillers, polyethylene wax, fatty acid amide, etc.

[0063] The inorganic or organic fillers mentioned above can include powders of silica, calcium carbonate, talc, kaolin, clay, titanium dioxide, alumina, and aluminum hydroxide as inorganic fillers, with silica powder being particularly preferred. As organic fillers, powders of melamine resin, urea resin, alkyd resin, epoxy resin, acrylic resin, polystyrene, fluoroethylene resin, and silicone resin can be used.

[0064] The content of the above-mentioned additive in the above-mentioned resin composition is preferably 4% by mass or more and 40% by mass or less. If the content of the additive is less than 4% by mass, the peel strength becomes too strong, and a good easy-open seal portion 53 (easy peelability) cannot be obtained. If the content of the additive exceeds 40% by mass, the peel strength becomes too weak, which is undesirable.

[0065] The application amount of the easy-peel heat-adhesive resin described above is 2 g / m² when dry. 2 More than 8g / m 2 The following is preferable: 3 g / m 2 More than 5g / m 2 The following is even more preferable.

[0066] Furthermore, when the easily peelable portion 54 is formed with an anti-heat sealant, a resin composition obtained by mixing an appropriate amount of mold release agent with the base resin can be used as the anti-heat sealant. For the resin of this base material, for example, ethylcellulose, cyclopolymer, or acrylic resin can be used, and for the release agent, for example, silicone resin, polyethylene wax, soy lecithin, or higher fatty acid amide can be used. When applying the anti-heat sealant, the amount applied should be small, and a thickness of 0.3 μm to 2 μm is appropriate.

[0067] Furthermore, since the easily peelable portion 54 weakens the bonding force between the inner surfaces of the blank plate 10, it is desirable not to provide it in areas where a strong bond is desired. In this embodiment, as shown in Figure 13A, it is desirable that the easily peelable portion 54 does not extend to the area of ​​the seal allowance 36 on the side edge. Considering manufacturing variations, it is desirable that the seal allowance 36 on the side edge and the easily peelable portion 54 are spaced apart. The spacing between them may be 0.5 mm or more and 15 mm or less.

[0068] If the gap is less than 0.5 mm, there is a risk that the side edge seal allowance 36b and the easily peelable portion 54 may overlap due to manufacturing variations. If the gap exceeds 15 mm, the opening when the top 71 of the resealable paper container 90 is fully opened becomes smaller, which can make it difficult to remove the remaining small amount of contents.

[0069] Furthermore, the vertical length (height) of the easy-peel processing section 54 may be greater than the vertical length (height) of the easy-open seal section 53, and its size may be 0.5 mm or more and 5 mm or less. This is because, even if the easy-peel processing section 54 and / or the easy-open seal section 53 are displaced from their predetermined positions due to manufacturing errors, the easy-open seal section 53 will not come out of the area of ​​the easy-peel processing section 54. As a result, the width of the easy-peel seal section 53 is maintained at a predetermined width, and the peel strength is stable. However, if its size is less than 0.5 mm, there is a risk that the easy-peel seal section 53 will come out of the area of ​​the easy-peel processing section 54. Furthermore, if its size exceeds 5 mm, there is a risk that the easy-peel processing section 54 and the chuck tape joint section 52 will interfere with each other, hindering the joining of the chuck tape 61 and the blank plate 10, which will be described later.

[0070] In this embodiment, an easy-peel processing section 54 is provided to appropriately set the peel strength of the easy-open seal section 53. However, if the peel strength can be appropriately set by other methods, it is not necessarily required to provide the easy-peel processing section 54. As an example of other methods, the heat sealing conditions (temperature, time, applied pressure, etc.) of the easy-peel seal section 53 may be appropriately set. Alternatively, the peel strength may be set while reducing the effective heat sealing area by making the area of ​​the easy-peel seal section 53 into a dot shape, stripe shape, etc.

[0071] <Chuck Tape> The chuck tape 61 is formed by extrusion molding of a male chuck tape 61m and a female chuck tape 61f, with the male chuck tape fitting portion 63m and the female chuck tape fitting portion 63f being fitted together.

[0072] <Instructions for joining chuck tape> The assembly procedure for the resealable paper container 90 will be explained later, but here we will explain the procedure for joining the resealable tape 61.

[0073] In this case, the zipper tape joint 52 is the planned joint for the zipper tape 61 when assembling the zippered paper container 90.

[0074] The back blank plate 10a and the front blank plate 10b are placed on top of each other, and the side edge sealing portions 36 and the easy-open sealing portions 53 are heat-sealed together. At this time, the male chuck tape 61m and female chuck tape 61f are pre-fitted together using the male chuck tape fitting portion 63m and female chuck tape fitting portion 63f, and the chuck tape 61 is inserted into this portion. Simultaneously, the chuck tape joint portion 52 is heated and pressurized from the outer surface of the two blank plates 10. Then, the blank plates 10 and the chuck tape body portion 62 of the chuck tape 61 are heat-sealed. (See Figures 15A and 15B).

[0075] Furthermore, the joining of the chuck tape 61 to the blank plate 10 is not limited to the heat sealing method described above; it may also be joined by other methods such as adhesive or adhesive tape.

[0076] By heat-sealing the chuck tape 61 in this manner, the misalignment of the heat seal is reduced compared to the method of heat-sealing the male chuck tape 61m and the female chuck tape 61f separately to the chuck tape joint 52, and the installation process is simplified, allowing the chuck tape 61 to be installed with production efficiency.

[0077] <Laminated blank sheet> As mentioned above, the laminated sheet 78 used for the blank plate 10 is a laminated sheet 78 in which at least a paper base material layer 782 is laminated and at least the innermost thermoplastic resin layer 783 is a thermoplastic resin such as polyethylene. However, if necessary, an intermediate layer may be provided with a barrier layer 785 for water vapor, oxygen or other substances, or a strength-enhancing layer.

[0078] Furthermore, when a printed layer such as a design is provided on the resealable paper container 90 of this embodiment, it is usually printed on the surface of the paper substrate layer 782. However, if the printability of the paper substrate layer 782 is poor, the printed layer such as a design can be provided on, for example, a biaxially oriented polyethylene terephthalate film, and that film can be laminated onto any of the outer layers of the paper substrate layer 782.

[0079] The paper base layer 782 will now be described. The paper base layer 782 is preferably made of paper that is rigid and resistant to cracking when folded along a fold line, but it is not particularly limited and can be appropriately selected and used depending on the contents to be filled into the resealable paper container 90, taking into consideration water resistance (size) and other factors. For example, high-quality paper, cup paper, and milk carton paper can be suitably used, with a basis weight of 80 g / m². 2 More than 320g / m 2 The following is appropriate.

[0080] This section describes the thermoplastic resin layer (sealant layer) used in the innermost layer, and optionally in the outermost and intermediate layers. The resin used for the thermoplastic resin layer (sealant layer) can include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymer polymerized using a single-site catalyst, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), random copolymer of ethylene-methacrylic acid (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomers, polypropylene and its copolymers, and polyester resins. From these, the most suitable resin can be appropriately selected and used depending on the contents being filled and the storage and usage conditions.

[0081] Among the thermoplastic resins mentioned above, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) are particularly excellent in terms of thermal stability during processing such as extrusion coating, adhesion to various substrates, and low-temperature heat sealability, as well as excellent thin-film formation properties. Therefore, it is easy to extrude and laminate the outermost thermoplastic resin layer, which does not require much thickness, to a relatively thin thickness, for example, 6 μm or more and 10 μm or less. This reduces the proportion of plastic material used and also provides cost advantages.

[0082] The innermost layer, and optionally the outermost and intermediate thermoplastic resin layers (sealant layers), can be laminated by extruding a resin coating onto their laminated surfaces after applying an easy-adhesion treatment such as an anchor coat, corona treatment, or flame treatment as needed. Alternatively, the thermoplastic resin can be pre-formed into a film, and then laminated by bonding the film using known methods such as dry lamination or extruded lamination (sandwich lamination).

[0083] When a barrier layer 785 is laminated as an intermediate layer of a laminated sheet 78, the barrier layer 785 can be a metal foil such as aluminum foil, or a vapor-deposited film in which metals or inorganic oxides such as aluminum, silica, or alumina are vapor-deposited onto a base film such as biaxially oriented polyethylene terephthalate film (hereinafter referred to as PET film), biaxially oriented nylon film (ONy film), or biaxially oriented polypropylene film (OPP film) to a thickness of 20 nm or more and 100 nm or less. Alternatively, ethylene vinyl acetate copolymer saponified film (hereinafter sometimes referred to as EVOH), biaxially oriented nylon MXD6 film, polyacrylonitrile film, and PET film, ONy film, or OPP film with a polyvinylidene chloride coating layer can be used.

[0084] Such a barrier layer 785 is usually preferably laminated on the inner surface of the paper substrate layer 782 in order to effectively utilize its barrier properties. However, if a metal foil such as aluminum or a metal vapor-deposited film is used for the barrier layer 785, it can also be laminated on the outer surface of the paper substrate layer 782 in order to utilize its metallic appearance in the design. The barrier layer 785 can be easily laminated by known methods such as dry lamination or extrusion lamination (sandwich lamination).

[0085] The layer configuration of the laminated sheet 78 of the blank plate 10 of the zippered paper container 90 in this embodiment is illustrated. Cross-sectional views of the laminated sheet 78 are shown in Figures 14A, 14B, 14C, and 14D.

[0086] Figure 14A is a cross-sectional view of a laminated sheet 78 of a blank plate 10 consisting of three layers, the layer configuration being as follows, where " / " indicates the boundary between adjacent layers. (Outer surface) Outermost thermoplastic resin layer 781 / Paper substrate layer 782 / Innermost thermoplastic resin layer 783 (inner surface)

[0087] Figure 14B is a cross-sectional view of a laminated sheet 78 of a blank plate 10 consisting of two layers, and its layer configuration is as follows. (Outer side) Paper substrate layer 782 / Innermost thermoplastic resin layer 783 (Inner side) This layer configuration is obtained by removing the outermost thermoplastic resin layer 781 from the three-layer blank plate 10 shown in Figure 12A.

[0088] Furthermore, if barrier properties (water vapor, oxygen, aroma retention, etc.) are required for the blank plate 10, a barrier layer 785 can be provided. Figure 14C is a cross-sectional view of a laminated sheet 78 of the blank plate 10, which consists of five layers, and its layer configuration is as follows. (Outer surface) Outermost thermoplastic resin layer 781 / Paper substrate layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (Inner surface)

[0089] Figure 14D is a cross-sectional view of a laminated sheet 78 of a blank plate 10 consisting of four layers, the layer configuration of which is as follows. (Outer surface) Paper substrate layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (inner surface) This is the layer configuration obtained by removing the outermost thermoplastic resin layer 781 from the five-layer blank plate 10 shown in Figure 12C.

[0090] The bonding between each layer of the above laminated sheets 78 is performed by known methods such as dry lamination, extrusion coating, or adhesive. Note that the layers used for bonding between layers may not be shown due to their thinness.

[0091] <Manufacturing of resealable paper containers> The following outlines the procedure from the blank sheet 10 of the resealable paper container 90 to the intermediate stage resealable paper container (flat state) 91, then to the intermediate stage resealable paper container (folded state) 92, and finally to the completion of the resealable paper container 90 package filled with contents.

[0092] <Preparation of a resealable paper container (flat state) in the intermediate stage> When the two blank plates 10 described above are stacked on top of each other, a chuck tape 61, which has a male chuck tape 61m and a female chuck tape 61f pre-fitted together, is inserted into the position where the chuck tape joint portions 52 overlap, and the chuck tape joint portions 52 are heated and pressurized from the outer surfaces of the two blank plates 10 to heat-seal them.

[0093] Next, the inner surfaces of the easy-open seal portions 53 are heat-sealed together, and the inner surfaces of the side edge seal portions 36 adjacent to the side edge portions 11 of the blank plate 10 are heat-sealed together. Then, the intermediate zippered paper container (flat state) 91 is formed into a bag shape with an opening at the bottom edge portion 26.

[0094] The resealable paper container 90 is not particularly limited in actual manufacturing, but to improve productivity, equipment may be used that performs the assembly of the paper container, the filling of the contents, and the sealing of each joint in-line.

[0095] In this apparatus, a long roll of printed laminated sheet 78 is unwound, and the paper containers are connected horizontally. This process may include folding lines, insertion and heat sealing of zipper tape 61, heat sealing of the side edge seal portion 36, and heat sealing of the easy-open seal portion 53.

[0096] Furthermore, the order of the steps described above is not required if the desired resealable paper container 90 can be obtained.

[0097] Here, the shape of the upper overlapping plate 34 and the shape of the top side plate 41 of the zippered paper container 90 in this embodiment will be explained with reference to Figure 5. Side panels 41 are attached to both the left and right sides of the upper overlapping panel 34. These three panels together are referred to as the top flap 45. The top flap 45 is provided with an opening grip 57, an easy-open seal 53, and a zipper tape 61, starting from the upper edge 21, and a first horizontal fold line 22 is located below the zipper tape 61.

[0098] Figure 11 shows the distance between the upper edge 21 and the top of the easy-open seal portion 53 as the first distance X. The distance between the zipper tape 61 and the first transverse fold line 22 is shown as the second distance Y. Furthermore, the distance between the upper edge 21 and the zipper tape 61 is shown as the third distance Z. The first distance X, second distance Y, and third distance Z will be explained later.

[0099] Incidentally, in the intermediate stage of the zippered paper container (flat state) 91, Figures 15A and 15B show enlarged cross-sectional views of the joint of the zipper tape 61, which is the point where the zipper tape 61 and the blank plate 10 are joined. The cutting point is shown at cross-sectional position CC in Figure 5. Here, the blank plate 10 is exemplified by the four-layer laminated sheet 78 shown in Figure 14D.

[0100] In Figure 15A, a female chuck tape 61f is joined to the front blank plate 10b as the front chuck tape 61b. The female chuck tape 61f includes a female chuck tape body portion 62f that is joined to the blank plate 10 and a female chuck tape fitting portion 63f that has a recess for fitting with the male chuck tape 61m. Furthermore, a male chuck tape 61m is joined to the back blank plate 10a as a back chuck tape 61a. The male chuck tape 61m includes a male chuck tape body portion 62m that is joined to the blank plate 10 and a male chuck tape fitting portion 63m that has a protrusion that fits with the female chuck tape 61f.

[0101] In Figure 15B, a male chuck tape 61m is joined to the front blank plate 10b as the front chuck tape 61b. The male chuck tape 61m includes a male chuck tape body portion 62m that is joined to the blank plate 10 and a male chuck tape fitting portion 63m that has a protrusion that fits with the female chuck tape 61f. Furthermore, a female chuck tape 61f is joined to the back blank plate 10a as a back chuck tape 61a. The female chuck tape 61f includes a female chuck tape body portion 62f that is joined to the blank plate 10 and a female chuck tape fitting portion 63f that has a recess for fitting with a male chuck tape 61m.

[0102] Whether a male chuck tape 61m or a female chuck tape 61f is joined to the front blank plate 10b is selected as appropriate based on the required performance of the resealable paper container 90 and the specifications of the manufacturing equipment for the resealable paper container 90.

[0103] <Intermediate stage: Fabrication of a resealable paper container (folded state)> In this intermediate stage, a mandrel is inserted through the opening 73 at the bottom of the zippered paper container (flat state) 91, leaving the upper overlapping plate 34 in place. The top plate 33 below it is spread forward and backward along the first horizontal fold line 22, and both the front first horizontal fold line 22b and the back first horizontal fold line 22a are valley-folded, causing the top flap 45, consisting of the upper overlapping plate 34 and the top side plate 41, to rise upward.

[0104] In order to ensure that the ridge portion 72d of the body portion 72 is bent properly, an auxiliary member may be brought into contact with the vicinity (including contact) of the ridge portion 72d from the inside and / or outside of the body portion 72.

[0105] An intermediate stage of a zippered paper container (folded box) 92 is formed, with a top section 71 made of a top plate 33 and a body section 72 following below the upper overlapping plate 34, and the bottom section 73 opening in a roughly rectangular shape. At this stage, as shown in Figure 6, the upper overlapping plate 34 is standing upright in the upward direction.

[0106] Although the design assumes a rectangular shape for the horizontal cross-section of the body 72 and the opening of the bottom 73, the resealable paper container 90 is made of a flexible laminated sheet 78 mainly composed of paper, so it is designed to be approximately rectangular, including cases where it is not perfectly rectangular.

[0107] <Forming and filling of resealable paper containers> Next, the upper overlapping plate 34, which stands upright, is folded and laid down on the back side (back top plate 33a side), and the top protrusions 74 that protrude on both the left and right sides are folded in the direction of the side plates 32 and joined to the body 72. At this time, the bent portion 76 of the top protruding portion 74 is bent, and in order to ensure that the bending of the bent portion 76 is carried out properly, an auxiliary member may be brought into contact with the vicinity (including contact) of the bent portion 76 from the inside and / or outside of the top portion 71.

[0108] The method by which the top projection 74 is joined to the body 72 may include using an adhesive (such as hot melt), using adhesive tape, or using a mechanical joining method (such as an engaging method or using a fastener). In addition, if the outermost layer of the blank plate 10 is provided with a thermoplastic resin layer (sealant layer), the thermoplastic resin layer (sealant layer) may be heat-sealed. The same method is used for joining the protruding part on the bottom, which will be described later.

[0109] The tip of the top projection 74 may be joined to the body 72 of the resealable paper container 90. Furthermore, the portion of the top projection 74 other than the tip may be joined to the body 72 of the resealable paper container 90. In that case, the tip of the top projection 74 does not need to be joined to the body 72 of the resealable paper container 90.

[0110] The bottom 73 of the intermediate-stage resealable paper container (folded state) 92 formed as described above is turned upward, the contents are filled in through the opening bottom 73, and then the bottom 73 is folded and the bottom sealing edges 37 are heat-sealed together in a gusset-like manner.

[0111] Subsequently, the joined bottom seal portion 37 is folded and laid flat on the back side (back bottom plate 35a side), and the protruding bottom portions on both the left and right sides are folded and joined to the bottom plate 35 side, thereby completing the packaging body of the roughly rectangular parallelepiped paper container 90 with a zipper.

[0112] Figure 7 is a perspective view showing the resealable paper container 90 according to this embodiment. Figure 8 is a side view of the resealable paper container 90 shown in Figure 7. Figure 9 is a top view of the resealable paper container 90 shown in Figure 7.

[0113] The resealable paper container 90 shown in Figure 7 has an outer shape that is roughly rectangular, and it has edges 72d on its body 72. Furthermore, since the resealable paper container 90 is made of a flexible laminated sheet 78 primarily composed of paper, it does not have a perfect rectangular prism shape, and is therefore described as having a roughly rectangular prism shape.

[0114] <Opening action for removing the contents of a resealable paper container> This section describes the procedure for opening the top 71 of the completed resealable paper container 90 containing the contents in order to remove the contents. First, the top projection 74, which is attached to the body 72, is detached. Then, as the top projection 74 is lifted upward, the top side plate 41 rises up, and the upper overlapping plate 34 rises up accordingly. The top side plate 41 and the upper overlapping plate 34 then become almost flush. The top side plate 41 and the top side plate 41, which are now almost flush, are together and called the top flap 45, as explained previously.

[0115] Then, the user grasps the opening grips 57 on both the front and back sides with their fingers and spreads the front blank plate 10b and the back blank plate 10a outwards (front-to-back direction), thereby peeling off the easy-open seal portion 53. This allows for the initial opening of the resealable paper container 90.

[0116] Next, after the initial opening of the resealable paper container 90, the resealable tape 61 is opened. The area between the upper edge 21b on the front and the front resealable tape 61b is defined as the opening grip allowance 571b after the initial opening on the front. The area between the upper edge 21a on the back and the back resealable tape 61b is defined as the opening grip allowance 571a after the initial opening on the back. Each of these opening grip allowances 571 after the initial opening includes the opening grip allowance 57, the easy-open seal portion 53, and the area between the resealable tape 61 and the easy-open seal portion 53.

[0117] The user grasps the opening gripping tabs 571 on both sides after initial opening and spreads the zippered paper container 90 outwards (front-to-back direction). Doing so separates the zipper tapes 61 provided on the upper overlapping plate 34 and the left and right side plates 41 at the top.

[0118] During the opening operation of the chuck tape 61, the ends of the chuck tape 61 on both the left and right side edges 11 of the blank plate 10 open up to approximately the entire width of the respective side edge seal allowance 36. As described above, the male zipper tape 61m and the female zipper tape 61f of the zipper tape 61 separate, forming the removal opening 56.

[0119] Figure 10 shows a resealable paper container 93 with an open top 71. Figure 11 shows an enlarged view of section B shown in Figure 10. Figure 11 shows the distance between the upper edge 21 and the top of the easy-open seal portion 53 as the first distance X, the distance between the zipper tape 61 and the first horizontal fold line 22 as the second distance Y, and the distance between the upper edge 21 and the zipper tape 61 as the third distance Z. The first distance X, second distance Y, and third distance Z will be explained later.

[0120] The size of the first distance X affects how easy it is for the user to grasp the opening grip 57 with their fingers in order to peel off the easy-open seal portion 53. When the easy-open seal portion 53 is opened, the position where the fingers grasp it is approximately in the center of the left-right width of the resealable paper container 90, so the first distance X within the range shown below is important. In other words, the range that contributes to ease of gripping may be considered to be the narrower of the range of 70 mm in the left-right direction relative to the center of the width of the resealable paper container 90, or the range between the second vertical fold lines 13 on the left and right. For the fingers to effectively grasp the opening gripping portion 57, it is desirable that the first distance X be at least 5 mm. A first distance X of 5 mm or more allows the user's fingers to effectively grasp the opening gripping portion 57 in order to peel off the easy-open seal portion 53.

[0121] However, if the first distance X exceeds 20 mm, waste will occur in the laminated sheets of the resealable paper container 80, and there is a risk that the upper edge of the resealable paper container 80 will protrude significantly beyond the back wall panel when completed. As a result, the upper edge of the resealable paper container 80 may be damaged during transport. In addition, when multiple resealable paper containers 80 are transported, it may not be possible to tightly seal adjacent containers, which may reduce transport efficiency (space efficiency).

[0122] The size of the third distance Z affects how easy it is for the user to grasp the opening grip 571 with their fingers in order to open the zipper tape 61 after the easy-open seal portion 53 has already been peeled off as an initial opening. The third distance Z is the first distance X plus the width of the easy-open seal portion 53 and the distance from the bottom of the easy-open seal portion 53 to the zipper tape fitting portion 63 of the zipper tape 61, and is a sufficiently easy size to grasp. When the user opens the zipper tape 61, they may also grasp the area of ​​the peeled-off easy-open seal portion 53.

[0123] Here, if the third distance Z is less than 15 mm, there is a risk that the easily peelable section 54 and the chuck tape 61 will interfere with each other.

[0124] Furthermore, if the sum of the second distance Y, the third distance Z, and half the width of the chuck tape fitting portion 63 is 20 mm or more greater than the vertical (height) length of the back top panel 33a, there will be waste in the laminated sheets of the zippered paper container 80, and when the zippered paper container 80 is completed, the upper edge may protrude significantly beyond the back wall panel. As a result, the upper edge of the zippered paper container 80 may be damaged when it is transported. Also, when multiple zippered paper containers 80 are transported, adjacent zippered paper containers 80 may not be able to be tightly packed together, which may reduce transport efficiency (space efficiency).

[0125] Furthermore, if the third distance Z exceeds 40 mm, the following phenomenon may occur. Specifically, when opening the chuck tape 61, the user may grasp the area near the upper edge 21 of the opening grip 571 after initial opening. In that case, the distance between the position where the user grasps the opening grip 571 after initial opening and the chuck tape 61 increases, making it difficult to apply force to separate the chuck tape 61, which may make it difficult to open the chuck tape 61.

[0126] The magnitude of the second distance Y affects whether the chuck tape 61 can be separated and the removal opening 56 can be smoothly expanded. When the zipper tape 61 is opened and the removal opening 56 is widened, it is preferable that the top flap 45 bulges smoothly when viewed from the outside in a horizontal cross-section, as shown in Figure 10.

[0127] When the second distance Y exceeds 20 mm, the zipper tape 861 is separated and the dispensing opening 856 is widened, and the first horizontal fold line 822, located approximately in the center of the left-right width of the zippered paper container 80, may deform into a valley fold when viewed from the outside. In this state, as the dispensing opening 856 is widened, the valley fold of the first horizontal fold line 822 progresses, making it difficult to widen the dispensing opening 856 smoothly.

[0128] Furthermore, in the above situation, damage may occur between the zipper tape 861 and the first horizontal fold line 822. A typical example of damage is a vertical wrinkle 89, which is shown in Figure 12, an enlarged view of section B described in Figure 10. However, the form of damage is not limited to a wrinkle 89. The wrinkle 89 tends to occur approximately in the center of the width of the zippered paper container 90. Although Figure 10 is a drawing of this embodiment, it is also used to explain the damage wrinkles 89 that occur in the conventional zippered paper container 80.

[0129] Furthermore, during the manufacturing process of the zippered paper container 80, the seal allowance 836 on the side edge is folded to the back, which can cause the top flap to tilt to the back. In this case, the first horizontal fold line 822a on the back is a sharp valley fold when viewed from the outside. When widening the dispensing opening 856, the valley fold at the first horizontal fold line 822a on the back is flattened and then deformed to bulge outwards. However, it is sometimes not possible to smoothly flatten the valley fold, and if the dispensing opening 856 is widened further in this state, the valley fold of the first horizontal fold line 822a on the back becomes even deeper. The above example shows a valley fold occurring along the first horizontal fold line 822a on the back side, but there are also cases where a valley fold occurs along the first horizontal fold line 822b on the front side.

[0130] To prevent valley folds from occurring along the first transverse fold line 22, it is desirable that the second distance Y be 20 mm or less. More preferably, it be 10 mm or less, which further reduces the likelihood of valley folds occurring along the first transverse fold line 22. When the second distance Y is sufficiently small, the first transverse fold line 22 is located within the range affected by the hardness of the chuck tape 61, which is a molded product of synthetic resin. As a result, the laminated sheet 78 in that portion becomes less prone to bending, and valley folds are less likely to occur along the first transverse fold line 22.

[0131] Furthermore, the second distance Y is preferably 5 mm or more. If the second distance Y is less than 5 mm, the zipper tape body 62 of the zipper tape 61 and the first transverse fold line 22 may interfere with each other, potentially hindering the folding of the first transverse fold line 22. This could then hinder the formation of the top portion 71 when forming the zippered paper container 90. More preferably, the second distance Y is 7 mm or more. This ensures that interference between the zipper tape body 62 of the zipper tape 61 and the first transverse fold line 22 is prevented.

[0132] Furthermore, it is desirable that the zipper tape 61 and the first horizontal fold line 22 be separated by at least 0.5 mm. By doing so, even considering manufacturing variations in the zippered paper container, interference between the zipper tape 61 and the first horizontal fold line 22 can be reliably prevented.

[0133] <Second aspect of this embodiment> Figure 13B shows this embodiment. This embodiment differs only in the shape of the easily peelable portion 54; other aspects are the same as in the first embodiment. In this embodiment, the length of the easy-peel portion 54 in the left-right direction is shorter than in the first embodiment. When the easy-open seal portion 53 is peeled off near the center in the width direction of the resealable paper container 90, the front blank plate 10b and the back blank plate 10a can be easily opened front to back. Therefore, the easy-peel portion 53 can also be easily peeled off. When the entire vertical (height) portion of the easy-peel portion 53 has been peeled off, the user can insert their fingers into that area and spread it in the left-right direction to peel off the easy-peel portion 53. In this case, the line segment of the easy-peel portion 53 to be peeled off is only the width of the easy-peel portion 53, so it is sufficiently small, and the easy-peel portion 53 can be peeled off even if the easy-peel portion 54 is not present. The easy-peel portion 54 may be located inside the two second vertical folding lines 13 without contacting them. Since there is no easy-peel processing section 54 at the point where the second vertical fold line 13 and the easy-open seal section 53 overlap, the joining of the easy-open seal section 53 is stable.

[0134] In this embodiment, there are areas of strong and weak peel strength in the easy-open seal portion 53. An easy-peel processing portion 54 is provided in the area with weak peel strength. However, the peel strength may be appropriately set by other methods. That is, the heat sealing conditions (temperature, time, pressure, etc.) of the easy-open seal portion 53 may be changed in areas of strong and weak peel strength. Alternatively, the weak area of ​​the easy-open seal portion 53 may be made into a dot shape, stripe shape, etc., and an appropriate (weak) peel strength may be set while reducing the actual heat sealing area. The same applies to other embodiments in which there are areas of strong and weak peel strength in the easy-open seal portion 53.

[0135] <Third aspect of this embodiment> Figure 13C shows this embodiment. This embodiment differs only in the shape of the easily peelable portion 54; other aspects are the same as in the first embodiment. In this embodiment, one end of the easy-peel portion 54 (the right side in this case) is approximately in the center of the resealable paper container 90. The other end of the easy-peel portion 54 (the left side in this case) is not in contact with the side edge seal portion 36 of the left side, but is in the vicinity. The easy-open seal portion 53 is joined to the entire width of the resealable paper container 90 in the transverse direction, including the area of ​​the easy-peel portion 54 with this shape.

[0136] When the resealable paper container 90 is initially opened, the easy-open seal portion 53 is peeled off. When only the area of ​​the easy-peel processed portion 54 is peeled off, the left half of the top portion 71 of the resealable paper container 90 is opened. The left half of the resealable tape 61 is also opened, so a smaller dispensing opening 56 is formed than if the entire width were opened. Therefore, it is effective when you want to dispense a small amount of the contents in an appropriate quantity.

[0137] When the contents have decreased and the contents remaining at the bottom 73 of the resealable paper container 90 are to be removed, the easy-open seal portion 53 may be peeled off over almost its entire width. Since there is already a portion of the easy-open seal portion 53 that has been peeled off in the vertical direction, the easy-open seal portion 53 can be easily peeled off by inserting a finger from that point and moving it to the right. The easy-peel section 54 may also be located on the other side (in this case, the right side). Furthermore, its length may be set to match the desired size of the removal opening 56. Furthermore, in this embodiment, the second vertical fold line 13b on the front side, the second vertical fold line 13a on the back side, and the first vertical fold line 12 located on the side of the retrieval opening 56 can be opened while having an appropriate shape and area.

[0138] <Fourth aspect of this embodiment> Figure 13D shows this embodiment. This embodiment differs only in the shape of the easily peelable portion 54; other aspects are the same as in the first embodiment. In this embodiment, the easy-peel portion 54 is provided so as to traverse between the left and right side edges 11. Therefore, the easy-peel portion 54 traverses the seal allowance 36 on both the left and right side edges. Thus, when the resealable paper container 90 is initially opened, the easy-open seal portion 53 is peeled off across the entire width of the resealable paper container 90 between the left and right side edges 11. As a result, the resealable tape 61 is largely exposed, and when the resealable tape 61 is opened, the opening 56 for removal can be made sufficiently large.

[0139] Furthermore, the front opening gripping area 57b and the back opening gripping area 57a are no longer joined at the side edge sealing area 36, ​​thus increasing their independence. As a result, the distance between the front opening gripping area 57b and the back opening gripping area 57a increases, making it easier for the user to insert their fingers and grasp the opening gripping area 57. [Examples]

[0140] The embodiments of this disclosure will be described in more detail below with reference to examples.

[0141] <Example 1> In Example 1, a paper container with a zipper 90, as shown in Figure 7, was manufactured using the blank plate 10 shown in Figures 4A and 4B, which corresponds to this embodiment. An easily peelable section 54 was provided on the inside of the blank plate 10, where a silicone resin-based heat-sealing agent was applied by gravure printing.

[0142] Two blank plates 10, as shown in Figures 4A and 4B, were prepared and placed on top of each other with their inner surfaces aligned. As shown in Figure 5, the seal portions 36 on both opposing side edges were heat-sealed, and the easy-open seal portion 53 on the top was also heat-sealed. The zipper tape 61 was also heat-sealed. In this way, an intermediate-stage zippered paper container (flat state) 91 was produced, with the bottom seal portion 37 not yet sealed.

[0143] The laminated sheet 78 of the blank plate 10 had the following configuration. Figure 14D shows a cross-sectional view of the laminated sheet 78, but the printed layers with patterns etc. are not shown. Note that " / " indicates the boundary between adjacent layers. (Outside) Image / design printing layer (gravure printing on the outer surface of paper substrate layer 782) / Paper base layer 782 (base paper for liquid paper containers 150g / m 2 Nippon Paper Industries) / Intermediate adhesive layer 784 (EMAA 20μm Mitsui Dow Polychemicals) N0908N) / Barrier layer 785 (silica vapor-deposited PET 12μm, Dai Nippon Printing) IB-PET-UBP) / The innermost thermoplastic resin layer is 783 (LDPE 40μm, made by Nippon Polyethylene). LC520) (Inside)

[0144] The manufacturing method for the laminated sheet 78 described above will be explained. First, a roll of paper substrate layer 782 is unwound, a predetermined image or text is gravure printed onto it at a predetermined position, and then it is wound up into a roll again.

[0145] In the next step, the roll-shaped paper substrate layer 782 described above was unwound, and a barrier layer 785 (silica-deposited PET 12 μm) was laminated to the inner surface of the paper substrate layer 782 by extrusion lamination (sandwich lamination), with a molten intermediate adhesive layer 784 (EMAA 20 μm) interposed in between.

[0146] Next, the innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed on the opposite side (inner surface) of the paper substrate layer 782 of the barrier layer 785 by extrusion lamination, and the material was wound up into a roll again.

[0147] Furthermore, to improve the bonding strength between each bonding layer, anchor coating, corona treatment, flame treatment, etc. may be performed as needed. Alternatively, the molten resin may be treated with ozone.

[0148] Next, the roll-shaped laminated sheet 78 was unwound, and an easy-peel section 54 was provided on a predetermined location on the inner surface of the innermost thermoplastic resin layer 783 by gravure printing, and then it was wound up into a roll again. In this embodiment, the paper substrate layer 782 is printed with the design beforehand while it is still a single layer. However, the design may be printed on the front surface of the laminated sheet 78 after the laminated sheet 78 is completed.

[0149] Next, the rolled laminated sheet 78 was unwound, and after scribing and die-cutting processes, the blank plate 10 was completed.

[0150] The zipper tape 61, which is heat-sealed and attached to the inner surface of the upper overlapping plate 34 and the top side plate 41 of the zippered paper container 90, has a two-layer structure for the heat-sealed zipper tape body 62, for both the male zipper tape 61m and the female zipper tape 61f. The zipper tape 61 has a resin layer made of LLDPE on the side that is heat-sealed to the zippered paper container 90, and a resin layer made of MDPE on the opposite side. The male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f are both made of LLDPE, and the zipper tape body portion 62 has a width of 7 mm in both cases.

[0151] The dimensions of the back blank plate 10a and the front blank plate 10b are rectangular, measuring 250 mm in length and 189 mm in width. A 7 mm wide side edge seal allowance 36 is provided on both side edges 11 as a seal allowance around the edges. In addition, a bottom seal allowance 37 with a width of 10 mm was provided at the lower edge portion 26 of the lower side. Furthermore, an opening gripping area 57 with a vertical length (short side direction) of 5 mm was provided on the upper edge 21 of the upper overlapping plate 34 and the top side plate 41, and below the opening gripping area 57, an easy-open seal area 53 with a vertical length (short side direction) of 3 mm was provided. Therefore, the first distance X, which is the distance from the upper edge 21 to the easy-open seal area 53, was 5 mm. The easy-open seal area 53 was sealed in the area of ​​the easy-peel processing area 54, except for the side edge seal area 36 and the vicinity of the side edge seal area 36.

[0152] On the blank plate 10, the upper overlapping plate 34, the first horizontal fold line 22, the top plate 33, the second horizontal fold line 23, the wall plate 31, the third horizontal fold line 24, and the bottom plate 35 are provided in this order, starting from the upper edge 21 and moving downwards.

[0153] Furthermore, side panels 41 of the top section are provided on the outer sides of both sides of the upper overlapping plate 34 via a second vertical folding line 13. Furthermore, a top projection 38 is provided on the outer sides of both sides of the top panel 33 via a second vertical bending line 13. Furthermore, side panels 32 are provided on the outer sides of both wall panels 31 via second vertical bending lines 13.

[0154] Furthermore, a bottom protrusion 43 is provided on the outer sides of both sides of the bottom plate 35 via a second vertical bending line 13.

[0155] Furthermore, below the easy-open seal portion 53, a chuck tape 61 was heat-sealed in a direction that crossed the top portion 71 on the inner surfaces of the upper overlapping plate 34 and the top side plate 41. Here, the third distance Z, which is the distance between the upper edge portion 21 and the chuck tape 61, was 18 mm. The second distance Y, which is the distance between the chuck tape 61 and the first transverse fold line 22, was 20 mm. As described above, an intermediate-stage paper container with a zipper (flat state) 91 was manufactured.

[0156] Next, the mandrel is inserted into the opening of the unsealed bottom sealing area 37 of the intermediate-stage zippered paper container (flat state) 91, leaving the upper overlapping plate 34 in place, and the top plate 33 below it is spread forward and backward by the first horizontal folding line 22, causing the upper overlapping plate 34 to stand upright. An intermediate-stage zippered paper container (folded state) 92 is formed, with a top section 71 made of a top plate 33 below the upper overlapping plate 34, followed by a body section 72 with a roughly rectangular horizontal cross-section (a plane roughly parallel to the bottom surface), and a roughly rectangular opening at the bottom 73. (See Figure 6).

[0157] Then, the overlapping upper overlapping plates 34 were folded towards the back top plate 33a. After that, the top projections 74, which were connected to both the left and right sides of the top section 71, were joined to the body section 72. Hot melt adhesive was used for this joining. Furthermore, the tip of the top protrusion 74 is folded inwards towards the inside of the zippered paper container 90 (downwards before the top protrusion 74 is folded) to facilitate joining the top protrusion 74 to the body 72.

[0158] When joining the top projection 74 to the body 72, the angle between the top 71 and the top projection 74, via the bent portion 76 of the top projection 74, was made approximately a right angle.

[0159] The completed torso section 72 was formed to have roughly rectangular dimensions of 95 mm in width, 120 mm in height, and 80 mm in depth. As described above, the resealable paper container 90 of this embodiment was manufactured.

[0160] <Example 2> In this embodiment, the configuration was the same as in Embodiment 1, except for the position of the easy-open seal portion 53 and the position of the zipper tape 61.

[0161] Specifically, as shown in Figure 5, an easy-open seal portion 53 was provided 20 mm below the upper edge 21 of the resealable paper container 90, in the transverse direction of the top 71 of the resealable paper container 90, as a means of sealing the container. In other words, the first distance X was 20 mm.

[0162] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 5 mm.

[0163] <Example 3> In this embodiment, the dimensions of the back blank plate 10a and the front blank plate 10b were rectangular, measuring 255 mm in length and 189 mm in width, which was about 5 mm longer in length than in Embodiment 1. This 5 mm increase in the vertical length of the top flap 45 was about 5 mm longer, while the sizes of the other forming plates remained unchanged. Furthermore, apart from the difference in the top flap 45, it was the same as Embodiment 1.

[0164] Specifically, as shown in Figure 5, an easy-open seal portion 53 was provided in the transverse direction of the top portion 71 of the resealable paper container 90, 5 mm below the upper edge portion 21 of the resealable paper container 90. In other words, the first distance X was 20 mm.

[0165] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 5 mm. In this embodiment, the upper edge portion 21 protruded about 5 mm outward (towards the back) from the back wall panel 31a.

[0166] <Example 4> In this embodiment, the dimensions of the back blank plate 10a and the front blank plate 10b were rectangular, measuring 225 mm in length and 189 mm in width, which was about 25 mm shorter in length than in Embodiment 1. This 25 mm reduction resulted in the length of the top flap 45 being about 25 mm shorter, while the sizes of the other forming plates remained unchanged. Furthermore, apart from the difference in the top flap 45, it was the same as Embodiment 1.

[0167] Specifically, as shown in Figure 5, an easy-open seal portion 53 was provided in the transverse direction of the top portion 71 of the resealable paper container 90, 5 mm below the upper edge portion 21 of the resealable paper container 90, as a means of sealing the container. Therefore, the first distance X was 5 mm.

[0168] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 5 mm. In this embodiment, the upper edge portion 21 was recessed approximately 25 mm inward (towards the front) compared to the back wall panel 31a.

[0169] <Comparative Example> <Comparative Example 1> In this comparative example, the dimensions of the back blank plate 10a and the front blank plate 10b were rectangular, measuring 250 mm in length and 169 mm in width, the same as in Example 1.

[0170] As shown in Figure 5, an easy-open seal portion 53 was provided in the transverse direction of the top 71 of the resealable paper container 90, 3 mm below the upper edge 21 of the resealable paper container 90, as a means of sealing the container. That is, the first distance X was 3 mm.

[0171] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 12 mm.

[0172] <Comparative Example 2> In this comparative example, the dimensions of the back blank plate 10a and the front blank plate 10b were rectangular, measuring 250 mm in length and 169 mm in width, the same as in Example 1.

[0173] As shown in Figure 5, an easy-open seal portion 53 was provided in the transverse direction of the top 71 of the resealable paper container 90, 12 mm below the upper edge 21 of the resealable paper container 90, as a means of sealing the container. That is, the first distance X was 12 mm.

[0174] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 3 mm.

[0175] <Comparative Example 3> In this comparative example, the dimensions of the back blank plate 10a and the front blank plate 10b were rectangular, measuring 270 mm in length and 189 mm in width, which was about 20 mm longer in length than in Example 1. This 20 mm difference resulted in the top flap 45 being about 20 mm longer in the vertical direction, while the sizes of the other molded plates remained unchanged. Aside from the difference in the top flap 45, the example was the same as in Example 1.

[0176] As shown in Figure 5, an easy-open seal portion 53 was provided 10 mm below the upper edge 21 of the resealable paper container 90, in the transverse direction of the top 71 of the resealable paper container 90, as a means of sealing the container. That is, the first distance X was 10 mm.

[0177] Furthermore, the zipper tape 61 was heat-sealed in a direction that crosses the top 71 of the zippered paper container 90 such that the second distance Y, which is the distance between the zipper tape 61 and the first transverse fold line 22, is 25 mm. In this embodiment, the upper edge portion 21 protruded about 20 mm outward (towards the back) from the back wall panel 31a.

[0178] <Rating> Fifty samples each of Examples 1 to 4 and Comparative Examples 1 to 3 were prepared. The samples were filled with snack food.

[0179] In all samples, the user grasped the front opening grip area between the front upper edge and the front easy-open seal, and the back opening grip area between the back upper edge and the back easy-open seal, with their fingers, and spread the resealable paper container outwards (front-to-back direction).

[0180] In the case of the resealable paper containers 90 of Examples 1 to 4, the user was able to sufficiently grasp the opening grip 57, so the easy-open seal 53 could be easily peeled off. Thus, the resealable paper container 90 could be initially opened.

[0181] After the initial opening of the resealable paper container 90, the reseal tape 61 was opened. Here, the area between the upper edge 21b on the front and the front reseal tape 61b is designated as the front post-initial opening gripping area 571b. Similarly, the area between the upper edge 21a on the back and the back reseal tape 61b is designated as the back post-initial opening gripping area 571a. The user grasped the front and back post-initial opening gripping areas 571 with their fingers and spread them outwards (front-to-back direction) of the resealable paper container 90. By doing so, the easy-open seal portions 53 provided on the upper overlapping plate 34 and the left and right top side plates 41 could be easily peeled off.

[0182] Furthermore, when the zipper tape 61 was detached and the retrieval opening 56 was expanded, the top flap 45 was able to smoothly inflate outwards. In addition, the first horizontal fold line 22 was not folded inwards when viewed from the outside. As a result, a sufficiently large retrieval opening 56 was secured. Furthermore, no damage (for example, a damaged wrinkle 89) occurred on the upper overlapping plate 34 between the chuck tape 61 and the first transverse fold line 22.

[0183] In the resealable paper container 80 of Comparative Example 1, a sufficiently large opening grip area was not formed, making it impossible to fully grasp the opening grip area with the fingers, and thus the retractable tape 861 could not be smoothly separated.

[0184] In the zippered paper container 80 of Comparative Example 2, the zipper tape 861 and the first transverse fold line 822 interfered with each other, causing problems when the first transverse fold line 822 was bent to form the intermediate zippered paper container (folded state).

[0185] In the zippered paper container 80 of Comparative Example 3, the upper edge of the zippered paper container 80 protruded significantly outward (towards the back) from the back wall panel. As a result, when transporting multiple units, it was not possible to transport them close to or in close proximity to adjacent zippered paper containers 80, resulting in poor space efficiency during transport. Furthermore, due to the large amount of protrusion of the upper edge, damage to the upper edge was likely to occur during transport, and a large external force was applied to the top flap, which sometimes caused the top protrusion 874 to unintentionally detach from the body 872.

[0186] Furthermore, in Comparative Example 3, because the second distance Y was large at 25 mm, when the chuck tape 861 was separated and the removal opening 856 was widened, the first transverse fold line 822a on the back was folded in a valley fold when viewed from the outside, and the top flap could not smoothly expand outwards.

[0187] As described above, the suitability of the contents to be removed and the resealability of the zipper were tested for the zippered paper containers 90 of Examples 1 to 4 in which the zipper tape 61 was detached.

[0188] The fastening tape 61 was easily released, opening the top of the resealable paper container 90 over almost its entire width, forming a dispensing opening 56. The snack food filled inside could be easily removed through this dispensing opening 56.

[0189] Furthermore, after removing some of the contents, the resealable paper containers 90 of Examples 1 to 4 were easily resealed by reattaching the zipper tape 61. The remaining contents were then properly stored.

[0190] Furthermore, the resealable paper container 90 of this disclosure fully satisfies the standard of 51% by mass or more for paper containers, in terms of the ratio of paper mass to the total mass of the resealable paper container 90. [Explanation of Symbols]

[0191] 10 Blank plates 10a Backside blank plate 10b Front blank plate 11 Side edge 12 First vertical fold line 13. Second vertical fold line 14 Second vertical bend imaginary line 15. Folding line of the protruding part on the top 17. Diagonal fold line on the top 18. Diagonal fold line on the bottom 21 Upper edge 22 First transverse fold line 23 Second transverse fold line 24 Third transverse fold line 25. Fourth transverse fold line 26 Lower edge 31 Wall panel 32 Side plate 33 Top plate 34. Upper overlapping plate 35 Bottom plate 36. Side edge sealing allowance 37. Bottom seal cost 38. Top protruding part 41 Top side panel 43 Bottom protrusion 45 Top flap 52 Chuck tape joint 53 Easy-open seal section 54 Easy-peel processing section 56 Removal opening 57. Opening and gripping fee 571 Initial opening and handling allowance 61 Chuck Tape 62 Chuck tape body 63 Chuck tape fitting part 71 Top of a resealable paper container 72 Body of a resealable paper container 72d Ridge of the fuselage 73 Bottom of a resealable paper container 74. Top protruding part 76. Folded portion of the protruding top section 78 Laminated Sheets 781 Outermost thermoplastic resin layer 782 Paper base layer 783 Innermost thermoplastic resin layer 784 Intermediate adhesive layer 785 Barrier layer 80 Conventional paper containers with zippers 81 Blank Plate 81a Backside blank plate 81b Front blank plate 812 First vertical fold line 821 Intermediate horizontal fold line (half-fold line) 831 Wall panel 833 Top plate 834 Upper overlapping plate 835 Bottom plate 836 Side edge sealing cost 851 Easy-open processed wire 856 Removal opening 861 Chuck Tape 871 Top of resealable paper container 872 Body of a resealable paper container 873 Bottom of a resealable paper container 89 Damaged wrinkles 90. Paper containers with zippers for disclosure. 91. A resealable paper container (flat state) in an intermediate stage of the present disclosure. 92. A resealable paper container (unfolded) in an intermediate stage of this disclosure. 93. Zippered paper container of the present disclosure with the top open. A. Enlarged view of the upper part of the intermediate-stage paper container (flat state) B. Enlarged view of the upper overlapping plate on the front of an opened resealable paper container. C. Cutting position in the enlarged cross-sectional view of the chuck tape joint. E. First celestial intersection (the intersection of the first vertical fold line and the first horizontal fold line) F. Second celestial intersection (the intersection of the second vertical fold line and the second horizontal fold line) G First bottom intersection (intersection of the first vertical fold line and the fourth horizontal fold line) H Second bottom intersection (intersection of the second vertical fold line and the third horizontal fold line) X is the first distance, which is the distance between the upper edge and the easy-open seal portion. The second distance is the distance between the Y-shaped chuck tape and the first transverse fold line. The third distance is the distance between the upper edge of Z and the chuck tape fitting portion.

Claims

1. In a resealable paper container, a blank plate having a fold line made of a laminated sheet including a paper base layer is assembled, The blank plate includes at least a front blank plate and a back blank plate, The top of the aforementioned zippered paper container is a top section consisting of an upper overlapping plate formed by overlapping and joining the front blank plate and the back blank plate, and a top plate connected to the bottom of the upper overlapping plate, The top side panels are connected to both the left and right sides of the aforementioned upper overlapping plate, The top part has protruding parts on both the left and right sides, The torso is located below the aforementioned top part, The bottom portion located below the torso, The upper overlapping plate and the upper edge of the top side plate are provided with an opening gripping area, Located below the aforementioned opening gripping area, the easy-open seal portion spans the upper overlapping plate and the top side plate, A zipper tape located below the easy-open seal portion and crossing the upper overlapping plate and the top side plate, The easy-open seal portion and the easy-peel portion that partially overlaps, The side edge sealing allowance located on the left and right side edges of the blank plate, Equipped with, A resealable paper container in which the distance between the easily peelable portion and the seal allowance on the side edge is 0.5 mm or more and 15 mm or less.

2. The zippered paper container according to claim 1, wherein the distance between the first horizontal fold line located below the upper overlapping plate and the zipper tape is 20 mm or less.

3. The zippered paper container according to claim 1, wherein the distance between the first horizontal fold line located below the upper overlapping plate and the zipper tape is 5 mm or more.

4. A resealable paper container according to any one of claims 1 to 3, wherein the length of the opening gripping portion in the vertical direction is 5 mm or more.

5. A resealable paper container according to any one of claims 1 to 3, wherein the length of the opening grip in the vertical direction is 20 mm or less.

Images