Paper bag packaging, sheet package, and method for manufacturing sheet package

Abstract

Provided is a paper bag packaging housing a sheet laminate in which a plurality of sheets are laminated, wherein said paper bag packaging has an opening cutting line forming an take-out opening for taking out a sheet from the paper bag packaging, and a reinforcing member provided in at least a part of the periphery of the take-out opening.

Description

Paper packaging bag, sheet packaging, and method for manufacturing sheet packaging

[0001] This disclosure relates to paper packaging bags, sheet packaging, and methods for manufacturing sheet packaging.

[0002] As a packaging body for sheets such as tissue paper, a sheet laminate in which multiple sheets are stacked is known to be housed in a packaging bag made of resin film with perforations for opening (for example, Patent Documents 1 and 2). Furthermore, from the viewpoint of reducing the amount of plastic used, a packaging body for paper products is known in which laminated tissue paper is covered with a packaging base material including a paper base material, and perforations are provided in the packaging base material to form an opening for removing the product (for example, Patent Document 3).

[0003] Japanese Patent Publication No. 2008-183034, Japanese Patent Publication No. 2018-177364, Japanese Patent Publication No. 2022-57523

[0004] In recent years, from the perspective of reducing environmental impact, it is desirable to use paper packaging bags made solely of paper for packaging sheets. However, sheet packaging using packaging bags with a high paper content presents challenges, such as difficulty in opening the dispenser and difficulty in removing the sheets.

[0005] The objective of this disclosure is to provide a paper packaging bag with an opening that is easy to open and allows for easy removal of the sheets.

[0006] A paper packaging bag according to one aspect of the present disclosure is a paper packaging bag that contains a sheet laminate in which a plurality of sheets are laminated together, and comprises a tear line that forms an opening for removing the sheets from the paper packaging bag, and a reinforcing member provided around at least a part of the opening.

[0007] According to one aspect of this disclosure, a paper packaging bag can be provided that has an opening that is easy to open and allows for easy removal of the sheets.

[0008] This figure shows a sheet packaging in which a sheet laminate is contained in a paper packaging bag of the first embodiment. This figure shows a sheet laminate contained in a paper packaging bag. This is a view of the sheet packaging of Figure 1 from the front. This is a view of the sheet packaging of Figure 1 from one side. This is a view of the sheet packaging of Figure 1 from the other side. This is a view of the sheet packaging of Figure 1 from the top. This is a view of the top of the sheet packaging of the first embodiment of Figure 6 from the bottom. This is a view of the top of the sheet packaging in which a sheet laminate is contained in a paper packaging bag of the first modification of the first embodiment, from the bottom. This is a view of the top of the sheet packaging in which a sheet laminate is contained in a paper packaging bag of the second modification of the first embodiment, from the bottom. This is a view of the top of the sheet packaging in which a sheet laminate is contained in a paper packaging bag of the third modification of the first embodiment, from the bottom. This is a view of the top of the sheet packaging in which a sheet laminate is contained in a paper packaging bag of the second embodiment, from the top. This is a view of the top of the sheet packaging of the second embodiment of Figure 11 from the bottom. This is a view from the bottom of the top surface of a sheet packaging body in which a sheet laminate is contained in a paper packaging bag of the first modification of the second embodiment. This is a view from the bottom of the top surface of a sheet packaging body in which a sheet laminate is contained in a paper packaging bag of the second modification of the second embodiment. This is a view from the bottom of the top surface of a sheet packaging body in which a sheet laminate is contained in a paper packaging bag of the third modification of the second embodiment. This is a view from the bottom of the top surface of a sheet packaging body in which a sheet laminate is contained in a paper packaging bag (Comparative Example 1) with a straight opening formed on the top surface. This is a view from the bottom of the top surface of a sheet packaging body in which a sheet laminate is contained in a paper packaging bag (Comparative Example 2) with a racetrack-shaped opening formed on the top surface.

[0009] The embodiments of this disclosure will be described in detail below with reference to the drawings. Parts common to all drawings may be denoted by the same reference numerals and their descriptions may be omitted. Furthermore, the scale of each component in each drawing may differ from that of the actual components.

[0010] In this specification, the directions in the figures are described using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z). In each figure, the left-right direction (the longitudinal direction of the sheet stack, packaging bag, or sheet packaging) is defined as the X direction, the front-back direction (the short direction of the sheet stack, packaging bag, or sheet packaging) is defined as the Y direction, and the up-down direction (the height direction of the sheet stack, packaging bag, or sheet packaging) is defined as the Z direction.

[0011] Furthermore, in this specification, deviations in each direction are permitted to the extent that they do not impair the function and effect of the embodiment. Note that "orthogonal" may include "approximately orthogonal".

[0012] <Sheet packaging>

[0013] Figure 1 shows a sheet packaging body in which a sheet laminate is contained in a paper packaging bag according to the first embodiment, and Figure 2 shows a sheet laminate contained in a paper packaging bag. Figure 3 is a view of the sheet packaging body of Figure 1 from the front, Figure 4 is a view of the sheet packaging body of Figure 1 from one side, and Figure 5 is a view of the sheet packaging body of Figure 1 from the other side.

[0014] As shown in Figure 1, the sheet packaging 100 comprises a sheet laminate SL and a paper packaging bag 10 that contains the sheet laminate SL.

[0015] As shown in Figure 2, the sheet laminate SL consists of multiple sheets S stacked in the stacking direction SD. The sheet laminate SL is designed so that sheets S can be pulled out one by one or one by one through an opening 20 formed in the paper packaging bag 10.

[0016] The form of the sheet laminate SL is not particularly limited, and for example, sheets S can be laminated in a folded state, sheets S can be laminated alternately in a folded state (a so-called pop-up type sheet laminate), or multiple sheets S can be simply laminated.

[0017] Furthermore, the dimensions of the sheet S (sheet laminate SL) can be such that the length in the longitudinal direction (X direction) of the paper packaging bag 10 is approximately 150 to 250 mm, the width in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the paper packaging bag 10 is approximately 70 to 150 mm, and the height in the height direction (Z direction) is approximately 20 to 100 mm. Such a sheet laminate can be manufactured, for example, by a rotary type or multi-stand type interfolder.

[0018] The form of sheet S is not particularly limited and can be applied to, for example, sanitary tissues such as tissue paper, paper towels, kitchen paper, and toilet paper. These sanitary tissues also include sanitary tissues containing moisturizing ingredients (for example, lotion tissues). These sanitary tissues are just examples of sheet-type sanitary tissues.

[0019] Furthermore, the use of sheet S is not particularly limited and can be applied to industrial, household, or portable use. Among these, household or portable tissue paper is preferably used as the sheet in this embodiment.

[0020] The number of plies in sheet S is not particularly limited, but can be one or more, preferably one ply or two plies (two layers). The shape of sheet S is also not particularly limited, but for example, it is preferable that the contour shape of a one-ply sheet when folded is rectangular (square, etc.).

[0021] The material of sheet S is not particularly limited, but for example, sheets of paper, nonwoven fabric, or cloth can be used, and paper (paper sheet) is preferred. When sheet S is a paper sheet, base paper made mainly from pulp is used. The pulp composition can be any known composition for paper sheets. For example, the pulp blending ratio can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0022] Furthermore, the pulp composition of the paper sheet used in sheet S is not particularly limited. For example, softwood pulp such as NBKP (softwood kraft pulp) or NUKP (unbleached softwood pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (unbleached hardwood pulp) can be used in any ratio.

[0023] In the paper sheet, the ratio of hardwood pulp to softwood pulp is not limited, but is preferably 90:10 to 20:80, and more preferably a pulp composition in which hardwood pulp is more abundant than softwood pulp. Furthermore, recycled paper pulp may be used in the pulp contained in the paper sheet.

[0024] The basis weight of sheet S is not particularly limited, but depending on the number of plies, it is 5 g / m² in the case of paper. ２ 80g / m or more ２ The following is preferable: 10 g / m ２ 60g / m or more ２ More preferably, 10 g / m ２ 45g / m or more ２ The following applies. Also, for nonwoven fabrics, the weight is 20 g / m². ２ More than 100g / m ２ The following are preferred. The basis weight will be measured in accordance with the provisions of JIS P 8124 (2011).

[0025] Furthermore, the thickness of the paper sheet is not particularly limited, and the paper thickness measured under the conditions of JIS P 8111 (1998) can be used. For example, if the sheet S is paper, the paper thickness is 50 μm or more and 800 μm or less per two plies, preferably 60 μm or more and 700 μm or less, and more preferably 70 μm or more and 500 μm or less.

[0026] Furthermore, the paper sheet used in sheet S may be embossed. Such embossing can be carried out by known embossing methods. The embossing method is not particularly limited and examples include the steel rubber method and the steel match method.

[0027] <Paper Packaging>The paper packaging bag 10 is composed of a paper base material. That is, in this embodiment, the sheet laminate SL as the object to be packaged is packaged in the paper base material. The paper base material indicates a base material containing paper.

[0028] The paper constituting the paper base material is, for example, a material obtained by adhering plant fibers (pulp). The pulp composition in the paper base material is not limited. For example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, and preferably, the ratio of softwood pulp to hardwood pulp is higher. Also, recycled pulp may be used for the pulp.

[0029] The type of paper is not particularly limited. For example, packaging paper can be applied. The packaging paper is further classified into unbleached packaging paper or bleached packaging paper.

[0030] Examples of unbleached packaging paper include double-recycled unbleached kraft paper, ribbed kraft paper, and single-sided unbleached kraft paper.

[0031] Examples of bleached packaging paper include pure white roll paper, double-recycled bleached kraft paper, single-sided bleached kraft paper, and light-colored imitation paper.

[0032] As the paper used for the paper base material, double-recycled kraft paper is preferable, and unbleached packaging paper is preferable.

[0033] The basis weight of the paper constituting the paper base material is not limited, but preferably 20 g / m ２ or more and 80 g / m ２ or less, more preferably 30 g / m ２ or more and 70 g / m ２ or less, even more preferably 40 g / m ２ or more and 60 g / m ２ or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0034] The thickness of the paper constituting the paper base material is not limited. For example, it is preferably 20 μm or more and 300 μm or less, more preferably 30 μm or more and 200 μm or less, and even more preferably 40 μm or more and 180 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

[0035] Further, the paper constituting the paper base material may be embossed. Such embossing can be carried out by a known embossing method. The embossing method is not particularly limited, and examples thereof include a steel rubber method, a steel match method, and the like.

[0036] When the paper constituting the paper base material is embossed, the thickness of the paper indicates the thickness of the paper before embossing.

[0037] The ratio of the paper in the paper base material is 50% or more, preferably 70% or more, and more preferably 100%.

[0038] The shape of the paper packaging bag 10 is not particularly limited, but it is substantially rectangular parallelepiped in a state where the sheet laminate SL is accommodated in the paper packaging bag 10. Such a substantially rectangular parallelepiped paper packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, a side surface 15, and a side surface 16. In the paper packaging bag 10, as shown in FIGS. 1, 3, 4, and 5, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the front surface 13 and the back surface 14 face each other in the width direction (Y direction), and the side surface 15 and the side surface 16 face each other in the longitudinal direction (X direction). Further, the side surfaces 15 and 16 are continuous with any of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14.

[0039] The dimensions of the paper packaging bag 10 are not particularly limited. For example, the length in the longitudinal direction (X direction) of the paper packaging bag 10 can be about 150 to 250 mm, the length in the short side direction (Y direction) orthogonal to the longitudinal direction (X direction) of the paper packaging bag 10 can be about 70 to 150 mm, and the height in the height direction (Z direction) can be about 20 to 100 mm. The dimensions of the paper packaging bag 10 are the dimensions in a state where the sheet laminate SL is accommodated in the paper packaging bag 10, as shown in FIGS. 1 and 2.

[0040] The packaging form of the paper packaging bag 10 can be, for example, as shown in Figure 3, a paper base material 10 having a predetermined length, with its edges 10A and 10B joined together to form a cylindrical shape, and the open end of the cylindrical paper base material sealed (pillow packaging), a cylindrical paper base material with both ends folded and sealed (caramel packaging), or a combination of these. In the case of pillow packaging, the cylindrical paper base material may be folded into a gusset shape.

[0041] As for the packaging form of the paper packaging bag 10, it is preferable to use caramel packaging. Specifically, as shown in Figures 1, 4, and 5, the seal portion 30 (front seal portion) on the front 13 of the paper packaging bag 10 is bonded, and the seal portions 40 and 50 (side seal portions) on the sides 15 and 16 of the paper packaging bag 10 are folded and bonded, thereby caramel-packaging the sheet laminate SL in the paper packaging bag 10.

[0042] The seal is formed by coating a paper substrate with a heat-sealing material and heating it. The components of the heat-sealing material are not particularly limited, but include, for example, polyethylene resins, polypropylene resins, and alkali-neutralized ethylene (meth)acrylic acid copolymers.

[0043] Alternatively, the seal portion may be bonded using a hot melt adhesive. The hot melt adhesive can have the same components as the heat seal material described above.

[0044] Examples of polyethylene resins include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), carboxylic acid-modified polyethylene, styrene-acrylic acid, styrene-butadiene latex and their derivatives, as well as mixtures thereof.

[0045] Examples of polypropylene resins include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, carboxylic acid-modified polypropylene, derivatives thereof, and mixtures thereof.

[0046] Examples of alkali-neutralized ethylene (meth)acrylic acid copolymers include those obtained by neutralizing the carboxyl groups of acrylic acid in an aqueous dispersion of ethylene (meth)acrylic acid copolymer resin with ammonia while heating and stirring in water.

[0047] Other additives may be incorporated into the heat seal material. Examples of additives include water-soluble polymers, adhesives, inorganic pigments, organic pigments, sizing agents, viscosity modifiers, coloring dyes, coloring pigments, water-resistant agents, lubricants, etc., either individually or in combination.

[0048] The coating method for the heat seal material is not particularly limited, and known coating methods can be used. For example, known coating machines or printing machines such as two-roll size press coaters, gate roll coaters, blade metering coaters, rod metering coaters, blade coaters, air knife coaters, roll coaters, brush coaters, kiss coaters, squeeze coaters, curtain coaters, die coaters, bar coaters, gravure coaters, and flexo coaters can be used for coating the heat seal material.

[0049] The coating amount of the heat sealant (based on solid content) is 1 g / m². ２ 50g / m or more ２ The following is preferable: 2 g / m ２ 30g / m or more ２ The following is more preferable: 3 g / m ２ 15g / m or more ２ The following is even more preferable: 5 g / m ２ 10g / m or more ２ The following is particularly preferable: The coating amount of the heat sealant is 1 g / m². ２ If the amount is less than 50 g / m², it may not have sufficient heat seal strength, and the bag may not be properly sealed. ２If this value is exceeded, the blocking suppression ability of the heat-sealed surface of the paper substrate will decrease, which may make it less slippery and more prone to tearing during the bag-making process, and may also prevent sufficient reduction in the amount of plastic used.

[0050] An opening 20 is formed on the top surface 11 of the paper packaging bag 10. The opening 20 is an opening for pulling out the sheets S of the sheet laminate SL from the paper packaging bag 10. The opening 20 is formed on the top surface 11 of the packaging bag 10 when a tearing line M provided on the top surface 11 is torn. The tearing line M is, for example, a perforation. The perforation is an intermittent cut line in which cuts and ties (uncut portions between two cuts) are arranged alternately, and when a tie breaks, the cuts on both sides become continuous cuts.

[0051] In the perforations, the length of the cut and the length of the tie are arbitrary. In the perforations, the length of the cut can be 1 mm or more and 19 mm or less, preferably 5 mm or more and 17 mm or less, and more preferably 10 mm or more and 15 mm or less. The length of the tie can be 0.3 mm or more and 1.2 mm or less, preferably 0.4 mm or more and 1.1 mm or less, and more preferably 0.5 mm or more and 1.0 mm or less.

[0052] The shape of the opening constituting the outlet 20 is not particularly limited, and for example, it may have a shape that extends in one direction when viewed from above. Furthermore, the shape that extends in one direction is not limited to a straight line, but may be an elongated rectangle, an ellipse, a racetrack shape (hereinafter referred to as track shape or track), a gourd shape (or dumbbell shape), etc. Here, a gourd shape (or dumbbell shape) refers to a shape in which the central part of an ellipse is constricted. Among these, a straight line, an ellipse, a track shape, and a gourd shape (or dumbbell shape) are preferred, and a straight line or a track shape is more preferred.

[0053] The length of the outlet 20 in the longitudinal direction (X direction) is not particularly limited, and for example, it is 40% to 100% of the length of the top surface 11 of the paper packaging bag 10 in the longitudinal direction (X direction), preferably 45% to 90%, and more preferably 50% to 80%.

[0054] Furthermore, the length of the short side (Y direction) of the dispensing opening 20 is preferably 0.1% to 45% of the length of the short side (Y direction) of the top surface 11 of the paper packaging bag 10, more preferably 0.1% to 30%, and even more preferably 0.1% to 15%.

[0055] In the paper packaging bag 10 of this embodiment, a reinforcing member 60 is provided around at least a portion of the opening 20. In this specification, the reinforcing member is a material that reinforces a portion of the paper packaging bag.

[0056] The reinforcing member 60 can be made of, for example, a hot melt material. The components of the hot melt material can be the same as those of the heat seal material or hot melt material used for bonding the seal portion described above.

[0057] Figure 6 is a view of the sheet packaging body of Figure 1 from the top side, and Figure 7 is a view of the top surface of the sheet packaging body of the first embodiment of Figure 6 from the bottom side. The reinforcing member 60 may be provided on the outside of the paper packaging bag 10, but it is preferable that it be provided on the inside of the paper packaging bag 10. In this embodiment, as shown in Figures 6 and 7, the reinforcing member 60 is provided on the back surface 10B of the top surface 10 of the paper packaging bag 10 relative to the front surface 10A.

[0058] The extent of the reinforcing member 60 provided around at least a portion of the outlet 20 is not particularly limited, but it is preferable that the reinforcing member 60 be provided around the entire circumference of the outlet 20. In this embodiment, as shown in Figure 7, the reinforcing member 60 is arranged on the back surface 10B of the top surface 11 of the paper packaging bag 10 so as to surround the entire outlet 20 (central part 21, one end 22 and the other end 23) in a plan view, which has a shape extending in one direction (the X direction in this embodiment) (straight in the first embodiment).

[0059] Figure 8 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to the first modification of the first embodiment. In Figure 8, parts common to Figure 7 are given the same reference numerals as in Figure 7, and their descriptions are omitted. In the first modification of the first embodiment shown in Figure 8, reinforcing members 60 (reinforcing members 61, 62) are provided at the ends 22, 23 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 8, the reinforcing members 60 are not provided in the central part 21 of the dispensing opening 20.

[0060] Figure 9 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to a second modification of the first embodiment. In Figure 9, parts common to Figure 7 are given the same reference numerals as in Figure 7, and their descriptions are omitted. In the second modification of the first embodiment shown in Figure 9, a reinforcing member 60 is provided at the central part 21 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 9, the reinforcing member 60 is not provided at both ends 22 and 23 of the dispensing opening 20.

[0061] Figure 10 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to a third modification of the first embodiment. In Figure 10, parts common to Figure 7 are given the same reference numerals as in Figure 7, and their descriptions are omitted. In the third modification of the first embodiment shown in Figure 10, a reinforcing member 60 is provided at the other end 23 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 10, the reinforcing member 60 is not provided at the central part 21 or one end 22 of the dispensing opening 20.

[0062] Figure 11 is a view from the top of a sheet packaging body in which a sheet laminate is housed in a paper packaging bag of the second embodiment, and Figure 12 is a view from the bottom of the top of the sheet packaging body of the second embodiment in Figure 11. In Figures 11 and 12, parts common to Figures 6 and 7 are given the same reference numerals as in Figures 6 and 7, and their descriptions are omitted. In the second embodiment, as shown in Figure 12, a reinforcing member 60 is arranged on the top surface 11 of the paper packaging bag 10 so as to surround the entire opening 20 (central part 21, one end 22 and the other end 23) in a plan view, which has a shape that extends in one direction (racetrack shape in the second embodiment).

[0063] Figure 13 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to the first modified example of the second embodiment. In Figure 13, parts common to Figure 8 are given the same reference numerals as in Figure 8, and their descriptions are omitted. In the first modified example of the second embodiment shown in Figure 13, reinforcing members 60 (reinforcing members 61, 62) are provided at the ends 22, 23 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 13, the reinforcing members 60 are not provided in the central part 21 of the dispensing opening 20.

[0064] Figure 14 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to a second modification of the second embodiment. In Figure 14, parts common to Figure 9 are given the same reference numerals as in Figure 9, and their descriptions are omitted. In the second modification of the second embodiment shown in Figure 14, a reinforcing member 60 is provided at the central part 21 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 14, the reinforcing member 60 is not provided at both ends 22 and 23 of the dispensing opening 20.

[0065] Figure 15 is a view of the top surface of a sheet packaging body, in which a sheet laminate is housed in a paper packaging bag, as seen from the bottom side, according to a third modification of the second embodiment. In Figure 15, parts common to Figure 10 are given the same reference numerals as in Figure 10, and their descriptions are omitted. In the third modification of the second embodiment shown in Figure 15, a reinforcing member 60 is provided at the other end 23 in one direction of the dispensing opening 20, which has a shape that extends in one direction. That is, in Figure 15, the reinforcing member 60 is not provided at the central part 21 or one end 22 of the dispensing opening 20.

[0066] In this embodiment, as described above, a reinforcing member 60 is provided around at least a portion of the dispensing opening 20 for removing the sheet S from the paper packaging bag 10, making it difficult for the packaging bag 10 to tear when opening the dispensing opening 20. Also, when removing the sheet S from the dispensing opening 20, the sheet S is less likely to tear, and the packaging bag 10 is less likely to tear. Therefore, according to this embodiment, even if the packaging bag constituting the sheet packaging body 100 is a paper packaging bag 10 with a high paper content, the dispensing opening 20 is easy to open and the sheet S is easy to remove.

[0067] Furthermore, in this embodiment, as shown in Figures 7 and 12 above, the reinforcing member 60 is provided around the entire circumference of the dispensing opening 20, so that the area around the tearing cut line M that forms the dispensing opening 20 is reinforced, making it easier to tear the tearing cut line M when opening the dispensing opening 20. In addition, the reinforcing member 60 that is continuous around the dispensing opening 20 can reliably prevent the packaging bag 10 from tearing when opening the dispensing opening 20 or when removing the sheet S from the dispensing opening 20.

[0068] In this embodiment, as shown in Figures 8 and 13 above, reinforcing members 60 are provided at both ends 22 and 23 of the dispensing opening 20 that extends in one direction, thereby preventing both the packaging bag from tearing and the sheet S from tearing at both ends 22 and 23 of the dispensing opening 20, which are most prone to tearing when the dispensing opening 20 is opened or when the sheet S is removed.

[0069] In this embodiment, as described above, the reinforcing member 60 is provided on the inside of the paper packaging bag 10 (the back surface 11B of the top surface 11), so that the reinforcing member 60 does not get in the way when opening the dispensing opening 20 or when taking out the sheet S, and without impairing the appearance, the packaging bag 10 is less likely to tear, and the sheet S is less likely to tear.

[0070] In this embodiment, since the reinforcing member 60 is made of hot melt material, it is easy to form the reinforcing member 60 around the dispensing opening 20. Furthermore, since flexibility can be provided to the portion to which the hot melt material is applied, the force applied to the dispensing opening 20 when the sheet S is pulled out from the dispensing opening 20 can be relieved. Therefore, in this embodiment, tearing of the packaging bag 10 and tearing of the sheet S can be prevented when the sheet S is removed.

[0071] In this embodiment, the paper packaging bag 10 is caramel-style packaging, which allows for compact packaging of the sheet laminate SL. Furthermore, even though the sheet laminate SL is compactly packaged, the reinforcing member 60 is provided around at least a portion of the opening 20, resulting in a paper caramel-style packaging bag that is easy to open and allows for easy removal of the sheets S.

[0072] In this embodiment, the sheet laminate SL is housed in the paper packaging bag 10 described above to form a sheet packaging body 100, thereby obtaining the same effects as the paper packaging bag 10 described above. That is, according to this embodiment, the packaging bag 10 is less likely to tear when opening the dispensing opening 20 or when removing the sheet S from the dispensing opening 20, and the sheet S is less likely to tear when removing the sheet S from the dispensing opening 20. Therefore, even if the paper ratio of the packaging bag 10 is high, a sheet packaging body 100 can be obtained in which the dispensing opening 20 is easy to open and the sheet S is easy to remove.

[0073] <Method for Manufacturing Sheet Packaging> The method for manufacturing sheet packaging according to this embodiment will be described with reference to the figures. The method for manufacturing sheet packaging according to this embodiment is a method for manufacturing sheet packaging 100 having a sheet laminate SL in which a plurality of sheets S are stacked, and a paper packaging bag 10 in which the sheet laminate SL is contained and which is provided with an outlet 20 for taking out the sheets S.

[0074] The manufacturing method of the sheet packaging according to this embodiment includes a sealing material application step and a reinforcement step. In the sealing material application step, sealing material is applied to the sealing portion that seals the paper packaging bag 10 while the sheet laminate SL is packaged. In this embodiment, as described above, heat sealing material is applied to the sealing portion 30 (front sealing portion) on the front 13 of the paper packaging bag 10 and the sealing portions 40, 50 (side sealing portions) on the sides 15, 16 of the paper packaging bag 10. The sealing portion 30 and the paper sealing portions 40, 50 are later heated and bonded together.

[0075] In the reinforcement process, a reinforcing member 60 is provided around at least a portion of the outlet 20. In this embodiment, as described above, the reinforcing member 60 may be provided around the entire circumference of the outlet 20, or the reinforcing member 60 may be provided in at least one of the following areas of the outlet 20, such as the central portion 21, one end 22, and the other end 23, in one direction.

[0076] In this embodiment, the reinforcement process is performed simultaneously with the sealing material application process. This means that the reinforcement process is performed within the period during which the sealing material application process is carried out. In this embodiment, by performing the reinforcement process simultaneously with the sealing material application process, it is possible to provide a reinforcing member around at least a portion of the opening of the packaging bag that constitutes the sheet packaging without increasing the number of manufacturing steps.

[0077] The present disclosure will be described in detail below using examples. The examples and comparative examples were evaluated by the following tests.

[0078] <Packaging (Test Specimen)> As a test specimen, a packaging 100 was prepared in which a sheet laminate SL, which is made up of multiple sheets S stacked together, was packaged in a packaging bag 10, as shown in Figure 1.

[0079] [Sheet Laminate (Packaged Item)] Sheet laminate SL consists of sheets S folded alternately and laminated so that they can be pulled out one set at a time in a pop-up fashion. (Daio Paper Corporation, Elleair Plus Kirei Compact Type, 2-ply, 200 sets, basis weight 14.5 g / m²) ２ A sheet laminate SL with a length of 186 mm, a packaging bag 10 with a length of 192 mm, and a packaging bag thickness of 40 μm was used.

[0080] [Paper packaging bags] Packaging bag 10, basis weight 50 g / m² ２ The packaging bag used was made of kraft paper (paper base material) coated with a heat-sealing material. The top surface 11 of the packaging bag 10 was provided with a straight or track-shaped opening 20 (tear line), and a reinforcing member was provided around at least a portion of the opening 20. The reinforcing member was formed by applying a hot-melt material made of ethylene-vinyl acetate copolymer (EVA).

[0081] <Tearing of the packaging bag upon opening> For the test specimens, the tearing of the packaging bag was checked and evaluated when the opening line was torn and the dispensing opening was opened. [Evaluation criteria] Excellent: Easy to open and did not tear Good: Difficult to open but did not tear Poor: Tore

[0082] <Sheet tearing during sheet removal> For the test specimens, tearing of the sheets when removing them from the dispenser was checked and evaluated. [Evaluation criteria] Excellent: Easy to remove from the first sheet without tearing Good: Difficult to remove from the first sheet but did not tear Poor: The first sheet tore

[0083] <Tearing of the packaging bag when removing sheets> For the test specimens, the tearing of the packaging bag when removing sheets from the dispensing opening was checked and evaluated. [Evaluation criteria] Excellent: Easy to remove from the first sheet without tearing Good: Difficult to remove from the first sheet but did not tear Poor: Torn

[0084] [Example 1] As shown in Figures 6 and 7, a sheet packaging body 100 was manufactured in which the shape of the dispensing opening 20 was made straight and reinforcing members were placed to surround the entire dispensing opening 20. The conditions and evaluation results are shown in Table 1.

[0085] [Example 2] As shown in Figure 8, a sheet packaging body 100 was manufactured in the same manner as in Example 1, except that reinforcing members 60 were placed at both ends 22 and 23 of the outlet 20. The conditions and evaluation results are shown in Table 1.

[0086] [Example 3] As shown in Figure 9, a sheet packaging body 100 was manufactured in the same manner as in Example 1, except that a reinforcing member 60 was placed in the central part 21 of the dispensing opening 20. The conditions and evaluation results are shown in Table 1.

[0087] [Example 4] As shown in Figure 10, a sheet packaging body 100 was manufactured in the same manner as in Example 1, except that a reinforcing member 60 was placed at the other end 23 of the outlet 20. The conditions and evaluation results are shown in Table 1.

[0088] [Example 5] As shown in Figures 11 and 12, a sheet packaging body 100 was manufactured in the same manner as in Example 1, except that the shape of the dispensing opening 20 was made into a racetrack shape. The conditions and evaluation results are shown in Table 1.

[0089] [Example 6] As shown in Figure 13, a sheet packaging body 100 was manufactured in the same manner as in Example 2, except that the shape of the dispensing opening 20 was made into a racetrack shape. The conditions and evaluation results are shown in Table 1.

[0090] [Example 7] As shown in Figure 14, a sheet packaging body 100 was manufactured in the same manner as in Example 3, except that the shape of the dispensing opening 20 was made into a racetrack shape. The conditions and evaluation results are shown in Table 1.

[0091] [Example 8] As shown in Figure 15, a sheet packaging body 100 was manufactured in the same manner as in Example 4, except that the shape of the dispensing opening 20 was made into a racetrack shape. The conditions and evaluation results are shown in Table 1.

[0092] [Comparative Example 1] As shown in Figure 16, a sheet packaging body 100 was manufactured in the same manner as in Example 1, except that the reinforcing member 60 was not placed. The conditions and evaluation results are shown in Table 1.

[0093] [Comparative Example 1] As shown in Figure 17, a sheet packaging body 100 was manufactured in the same manner as in Example 5, except that the reinforcing member 60 was not placed. The conditions and evaluation results are shown in Table 1.

[0094]

[0095] As shown in Table 1, in Examples 1 to 8, in sheet packaging in which a reinforcing member 60 is provided around at least a portion of the opening 20 for removing the sheet S from the paper packaging bag 10, no tearing of the packaging bag when opened, no tearing of the sheet when removing the sheet, and no tearing of the packaging bag when removing the sheet occurred.

[0096] On the other hand, in Comparative Examples 1 and 2, the sheet packaging without the reinforcing member 60 experienced tearing of the packaging bag upon opening. The adhesion of the packaged material was poor (Comparative Example 1). In addition, in Comparative Example 1, tearing of the sheet and tearing of the packaging bag occurred when the sheet was removed.

[0097] These results show that by providing reinforcing material around at least a portion of the opening, a sheet packaging can be obtained that is easy to open and allows for easy removal of the sheets, even if the proportion of paper in the paper packaging bag is high.

[0098] The embodiments disclosed above include, for example, the following aspects:

[0099] A first aspect of the present disclosure is a paper packaging bag for containing a sheet laminate in which a plurality of sheets are stacked, the paper packaging bag having a tear line that forms an opening for removing the sheets from the paper packaging bag, and a reinforcing member provided around at least a part of the opening.

[0100] In the first embodiment, a reinforcing member is provided around at least a portion of the opening for removing sheets from the paper packaging bag, making it difficult for the packaging bag to tear when opening the opening. Also, when removing sheets from the opening, the sheets are less likely to tear, and the packaging bag is less likely to tear. Therefore, according to the first embodiment, even with a high paper content, a paper packaging bag can be obtained that is easy to open and allows for easy removal of sheets.

[0101] A second aspect of the present disclosure is the paper packaging according to the first aspect, wherein the reinforcing member is provided around the entire circumference of the outlet.

[0102] In the second embodiment, the reinforcing member is provided around the entire circumference of the dispensing opening, so that the area around the tear-off line forming the dispensing opening is reinforced, making it easier to tear the tear-off line when opening the dispensing opening. In addition, the reinforcing member continuous around the dispensing opening can reliably prevent the packaging bag from tearing when opening the dispensing opening or when removing a sheet from the dispensing opening.

[0103] A third aspect of the present disclosure is a paper packaging bag according to the first or second aspect, wherein the outlet has a shape that extends in one direction, and the reinforcing member is provided at both ends of the outlet in that one direction.

[0104] In the third embodiment, reinforcing members are provided at both ends of the unidirectional outlet, thereby preventing tearing of both the packaging bag and the sheet at the ends of the outlet, which are most prone to tearing when the outlet is opened or the sheet is removed.

[0105] A fourth aspect of the present disclosure is a paper packaging body according to any one of the first to third aspects, wherein the reinforcing member is provided inside the paper packaging bag.

[0106] In the fourth embodiment, the reinforcing member is provided on the inside of the paper packaging bag, so that it does not get in the way when opening the opening or when taking out the sheet, and the packaging bag and the sheet are less likely to tear without spoiling the appearance.

[0107] A fifth aspect of this disclosure is a paper packaging according to any one of the first to fourth aspects, wherein the reinforcing member is made of a hot melt material.

[0108] In the fifth embodiment, since the reinforcing member is made of hot melt material, it is easy to form the reinforcing member around the dispensing opening. Furthermore, since flexibility can be provided to the part to which the hot melt material is applied, the force applied to the dispensing opening when the sheet is pulled out from the dispensing opening can be relieved. Therefore, in the fifth embodiment, tearing of the packaging bag and tearing of the sheet when the sheet is removed can be prevented.

[0109] The sixth aspect of this disclosure is a packaging body according to any one of the first to fifth aspects, wherein the paper packaging bag is caramel-wrapped.

[0110] In the sixth embodiment, the paper packaging bag is caramel-style packaging, which allows for compact packaging of the sheet laminate. Furthermore, even though the sheet laminate is compactly packaged, a reinforcing member is provided around at least a portion of the opening, resulting in a paper caramel-style packaging bag that is easy to open and allows for easy removal of the sheets.

[0111] A seventh aspect of the present disclosure is a sheet packaging comprising a paper packaging bag described in any one of the first to sixth aspects, and the sheet laminate contained in the paper packaging bag.

[0112] In the seventh embodiment, the laminated sheets are housed in the aforementioned paper packaging bag to constitute a sheet packaging body, thereby achieving the same effects as the aforementioned paper packaging bag. That is, according to the seventh embodiment, the packaging bag is less likely to tear when opening the opening or when removing sheets from the opening, and the sheets are less likely to tear when removing sheets from the opening. Therefore, even if the paper ratio of the packaging bag is high, a sheet packaging body can be obtained in which the opening is easy to open and the sheets are easy to remove.

[0113] An eighth aspect of the present disclosure is a method for manufacturing a sheet packaging, comprising a sheet laminate formed by stacking a plurality of sheets, and a paper packaging bag in which the sheet laminate is contained and which has a tear-off line forming an opening for removing the sheets, the method comprising: a sealing material application step of applying a sealing material to a sealing portion that seals the paper packaging bag while the sheet laminate is packaged, and a reinforcement step of providing a reinforcing member around at least a part of the opening, wherein the reinforcement step is performed simultaneously with the sealing material application step.

[0114] In the eighth embodiment, by performing the reinforcement step simultaneously with the sealing material application step, a reinforcing member can be provided around at least a portion of the opening of the packaging bag constituting the sheet packaging without increasing the number of manufacturing steps.

[0115] Although embodiments of this disclosure have been described above, this disclosure is not limited to any particular embodiment, and various modifications and changes are possible within the scope of the invention as described in the claims.

[0116] This application claims priority based on Japanese Patent Application No. 2024-170461, filed on 30 September 2024, the entire contents of which are incorporated herein by reference.

[0117] 100 Sheet packaging 10 Paper packaging bag (paper base material) 10A Edge 10B Edge 11 Top surface 11A Front surface 11B Back surface 12 Bottom surface 13 Front 14 Back surface 15 Side surface 16 Side surface 20 Opening M Tear line 30 Seal part (front seal) 40 Seal part (side seal) 50 Seal part (side seal) 60, 61, 62 Reinforcement member S Sheet SL Sheet laminate SD Lamination direction

Claims

1. A paper packaging bag for containing a sheet laminate in which multiple sheets are stacked, the paper packaging bag having a tear line that forms an opening for removing the sheets from the paper packaging bag, and a reinforcing member provided around at least a part of the opening.

2. The paper packaging bag according to claim 1, wherein the reinforcing member is provided around the entire circumference of the outlet.

3. The paper packaging bag according to claim 1, wherein the outlet has a shape that extends in one direction, and the reinforcing member is provided at both ends of the outlet in that one direction.

4. The paper packaging bag according to claim 1, wherein the reinforcing member is provided on the inside of the paper packaging bag.

5. The paper packaging bag according to claim 1, wherein the reinforcing member is made of a hot melt material.

6. The paper packaging bag according to claim 1, wherein the packaging of the paper packaging bag is caramel packaging.

7. A sheet packaging comprising a paper packaging bag according to any one of claims 1 to 6, and the sheet laminate housed in the paper packaging bag.

8. A method for manufacturing a sheet packaging, comprising a sheet laminate formed by stacking multiple sheets, and a paper packaging bag in which the sheet laminate is contained and which has a tear-off line forming an opening for removing the sheets, the method comprising: a sealing material application step of applying a sealing material to a sealing portion that seals the paper packaging bag while the sheet laminate is packaged; and a reinforcement step of providing a reinforcing member around at least a part of the opening, wherein the reinforcement step is performed simultaneously with the sealing material application step.

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