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

Abstract

To provide a paper packaging bag with an easily accessible opening and easy-to-remove sheets. [Solution] The paper packaging bag contains a sheet laminate made of multiple sheets stacked together, and has a tear line that forms an opening for removing sheets from the paper packaging bag, and a reinforcing member provided around at least a part of the opening.

Description

[Technical Field]

[0001] The present invention relates to paper packaging bags, sheet packaging, and a method for manufacturing sheet packaging. [Background technology]

[0002] Packaging for sheets such as tissue paper is known to consist of a laminate of sheets, which is contained in a resin film packaging bag with perforations for opening (for example, Patent Documents 1 and 2). Furthermore, from the viewpoint of reducing the amount of plastic used, packaging for paper products is known in which laminated tissue paper is covered with a packaging material containing a paper base, and the packaging material is provided with perforations to form an opening for dispensing (for example, Patent Document 3). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2008-183034 [Patent Document 2] Japanese Patent Publication No. 2018-177364 [Patent Document 3] Japanese Patent Publication No. 2022-57523 [Overview of the project] [Problems that the invention aims to solve]

[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 object of the present invention is to provide a paper packaging bag that is easy to open and allows for easy removal of the sheets. [Means for solving the problem]

[0006] A first aspect of the present invention 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.

[0007] 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, neither the sheets nor the packaging bag are easily torn. 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.

[0008] A second aspect of the present invention is a paper packaging body according to the first aspect, wherein the reinforcing member is provided around the entire circumference of the outlet.

[0009] 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.

[0010] A third aspect of the present invention 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.

[0011] 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.

[0012] The fourth aspect according to the present invention is the paper packaging body according to any one of the first to third aspects, wherein the reinforcing member is provided inside the paper packaging bag.

[0013] In the fourth aspect, since the reinforcing member is provided inside the paper packaging bag, when opening the outlet or taking out the sheet, the reinforcing member does not get in the way and does not damage the appearance, making the packaging bag and the sheet less likely to be torn.

[0014] The fifth aspect according to the present invention is the paper packaging body according to any one of the first to fourth aspects, wherein the reinforcing member is made of a hot melt material.

[0015] In the fifth aspect, since the reinforcing member is made of a hot melt material, it is easy to form the reinforcing member around the outlet. Also, since flexibility can be imparted to the portion where the hot melt material is applied, the force applied when the sheet is pulled out from the outlet around the outlet where the hot melt material is applied can be released. Therefore, in the fifth aspect, it is possible to prevent the packaging bag and the sheet from being torn when taking out the sheet.

[0016] The sixth aspect according to the present invention is the packaging body according to any one of the first to fifth aspects, wherein the packaging of the paper packaging bag is caramel packaging.

[0017] In the sixth aspect, since the packaging of the paper packaging bag is caramel packaging, the sheet laminate can be packaged compactly. Also, even if the sheet laminate is packaged compactly, since the reinforcing member is provided at least in part around the outlet, a paper caramel packaging bag that is easy to open the outlet and easy to take out the sheet can be obtained.

[0018] The seventh aspect according to the present invention is a sheet packaging body having the paper packaging bag according to any one of the first to sixth aspects and the sheet laminate housed in the paper packaging bag.

[0019] 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 is obtained in which the opening is easy to open and the sheets are easy to remove.

[0020] An eighth aspect of the present invention is a method for manufacturing a sheet packaging body, 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.

[0021] 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. [Effects of the Invention]

[0022] According to one aspect of the disclosed invention, a paper packaging bag can be provided that has an opening that is easy to open and allows for easy removal of the sheets. [Brief explanation of the drawing]

[0023] [Figure 1] This figure shows a sheet packaging body in which a sheet laminate is contained in a paper packaging bag according to the first embodiment. [Figure 2] This figure shows a sheet laminate housed in a paper packaging bag. [Figure 3] Figure 1 is a view of the sheet packaging from the front. [Figure 4]This is a view of the sheet packaging shown in Figure 1, seen from one side. [Figure 5] This is a view of the sheet packaging shown in Figure 1, seen from the other side. [Figure 6] This is a view of the sheet packaging shown in Figure 1, seen from the top. [Figure 7] Figure 6 shows the top surface of the sheet packaging body of the first embodiment as viewed from the bottom side. [Figure 8] This 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. [Figure 9] This 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. [Figure 10] This 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. [Figure 11] This figure shows 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. [Figure 12] This is a view from the top of a sheet packaging body in which a sheet laminate is housed in a paper packaging bag according to the second embodiment. [Figure 13] Figure 12 shows the top surface of the sheet packaging of the second embodiment as viewed from the bottom side. [Figure 14] This 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. [Figure 15] This 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. [Figure 16] This 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. [Figure 17] This figure shows a sheet packaging 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. [Modes for carrying out the invention]

[0024] The embodiments of the present invention will be described in detail below with reference to the drawings. Parts common to all figures 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.

[0025] In this specification, the directions in the figures are described using a three-dimensional Cartesian coordinate system with three axes (X, Y, and Z directions). In each figure, the left-right direction (the longitudinal direction of the sheet stack, packaging bag, or sheet packaging) is the X direction, the front-back direction (the short direction of the sheet stack, packaging bag, or sheet packaging) is the Y direction, and the up-down direction (the height direction of the sheet stack, packaging bag, or sheet packaging) is the Z direction.

[0026] 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".

[0027] <Sheet packaging>

[0028] 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 shows the sheet packaging body of Figure 1 viewed from the front, Figure 4 shows the sheet packaging body of Figure 1 viewed from one side, and Figure 5 shows the sheet packaging body of Figure 1 viewed from the other side.

[0029] The sheet packaging 100 comprises a sheet laminate SL and a paper packaging bag 10 that contains the sheet laminate SL.

[0030] 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.

[0031] The form of the sheet laminate SL is not particularly limited, and for example, sheets S are laminated in a folded state, sheets S are laminated alternately in a folded state (a so-called pop-up type sheet laminate), or multiple sheets S are simply laminated.

[0032] 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 a multi-stand type interfolder.

[0033] 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 (e.g., lotion tissues). These sanitary tissues are just examples of sheet-type sanitary tissues.

[0034] 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.

[0035] 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.).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 More than 80g / m 2 The following is preferable: 10 g / m² 2 More than 60g / m 2 More preferably 10 g / m 2 More than 45g / m 2 The following applies. Also, for nonwoven fabrics, the weight is 20g / 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).

[0040] 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 2 plies, preferably 60 μm or more and 700 μm or less, and more preferably 70 μm or more and 500 μm or less.

[0041] 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.

[0042] <Paper packaging> The paper packaging bag 10 is made of a paper base material. In other words, in this embodiment, the sheet laminate SL, which is the object to be packaged, is packaged in the paper base material. The paper base material refers to a base material that includes paper.

[0043] The paper that constitutes the paper substrate is, for example, pulp made by bonding plant fibers together. The pulp composition in the paper component is not limited, but for example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, and preferably the pulp composition has a higher proportion of softwood pulp than hardwood pulp. Recycled paper pulp may also be used as the pulp.

[0044] The type of paper is not particularly limited, but for example, packaging paper can be used. Packaging paper is further classified into unbleached packaging paper or bleached packaging paper.

[0045] Examples of unbleached wrapping paper include double-sided unbleached kraft paper, ribbed kraft paper, and single-sided glossy unbleached kraft paper.

[0046] Examples of bleached wrapping paper include pure white roll paper, double-sided bleached kraft paper, single-sided glossy bleached kraft paper, and thin imitation paper.

[0047] As the paper used for the paper substrate, double-recycled kraft paper is preferred, and unbleached wrapping paper is preferred.

[0048] The basis weight of the paper constituting the paper substrate 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).

[0049] The thickness of the paper constituting the paper substrate is not limited, but 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, 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).

[0050] In addition, the paper constituting the paper substrate may be embossed. Such embossing can be carried out by a known embossing method. The embossing method is not particularly limited, and examples include the steel rubber method, the steel match method, etc.

[0051] When the paper constituting the paper substrate is embossed, the thickness of the paper indicates the thickness of the paper before embossing.

[0052] The ratio of the paper in the paper substrate is 50% or more, preferably 70% or more, and even more preferably 100%.

[0053] The shape of the paper packaging bag 10 is not particularly limited, but it is approximately a rectangular parallelepiped when the sheet laminate SL is contained within the paper packaging bag 10. Such an approximately rectangular parallelepiped paper packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, and two sides 15 and 16. In the paper packaging bag 10, as shown in Figures 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 two sides 15 and 16 face each other in the longitudinal direction (X direction). Also, the sides 15 and 16 are continuous with any of the top surface 11, bottom surface 12, front surface 13, and back surface 14.

[0054] 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 transverse direction (Y direction) perpendicular to the longitudinal direction (X direction) can be about 70 to 150 mm, and the height in the height direction (Z direction) can be about 20 to 100 mm. Note that the dimensions of the paper packaging bag 10 are those when the sheet laminate SL is contained in the paper packaging bag 10, as shown in Figures 1 and 2.

[0055] 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.

[0056] 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.

[0057] The seal is bonded to the paper substrate by coating it 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.

[0058] 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.

[0059] 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, and mixtures thereof.

[0060] 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.

[0061] 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.

[0062] Other additives may be incorporated into the heat seal material. Examples of other 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.

[0063] 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 a 2-roll size press coater, gate roll coater, blade metering coater, rod metering coater, blade coater, air knife coater, roll coater, brush coater, kiss coater, squeeze coater, curtain coater, die coater, bar coater, gravure coater, and flexo coater can be used for coating the heat seal material.

[0064] The coating amount of heat sealant (based on solid content) is 1 g / m². 2 More than 50g / m 2 The following is preferable: 2 g / m 2 More than 30g / m 2 The following is more preferable: 3 g / m 2 More than 15g / m 2 The following is even more preferable: 5 g / m 2 More than 10g / m 2 The following is particularly preferable: The coating amount of the heat sealant is 1 g / m². 2 If the amount is less than 50g / m², it may not have sufficient heat seal strength, and the bag may not be properly sealed. 2 If 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.

[0065] 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.

[0066] In the perforations, the cut length and tie length are arbitrary. In the perforations, the cut length 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 tie length 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.

[0067] 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.

[0068] 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%.

[0069] 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%.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 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).

[0074] 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 modified example 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 modified example 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.

[0075] 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, in a second modified example 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 modified example 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.

[0076] 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.

[0077] Figure 12 is a view from the top of the sheet packaging body in which the sheet laminate is housed in the paper packaging bag of the second embodiment, and Figure 13 is a view from the bottom of the top of the sheet packaging body of the second embodiment shown in Figure 13. In Figures 12 and 13, 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 13, 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).

[0078] 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 the first modified example of the second embodiment. In Figure 14, 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 14, 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 14, the reinforcing members 60 are not provided in the central part 21 of the dispensing opening 20.

[0079] 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, in a second modified example of the second embodiment. In Figure 15, parts common to Figure 9 are given the same reference numerals as in Figure 9, and their descriptions are omitted. In the second modified example of the second embodiment shown in Figure 15, 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 15, the reinforcing member 60 is not provided at both ends 22 and 23 of the dispensing opening 20.

[0080] Figure 16 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 modified example of the second embodiment. In Figure 16, parts common to Figure 10 are given the same reference numerals as in Figure 10, and their descriptions are omitted. In the third modified example of the second embodiment shown in Figure 16, 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 16, the reinforcing member 60 is not provided at the central part 21 or one end 22 of the dispensing opening 20.

[0081] 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.

[0082] Furthermore, in this embodiment, as described 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.

[0083] In this embodiment, as described above, reinforcing members 60 are provided at both ends 22 and 23 of the dispensing opening 20 in that 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.

[0084] 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.

[0085] 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.

[0086] In this embodiment, the caramel packaging of the paper packaging bag 10 allows the sheet laminate SL to be packaged compactly. Furthermore, even though the sheet laminate SL is packaged compactly, a reinforcing member 60 is provided around at least a portion of the opening 20, making the opening 20 easy to open and the sheets S easy to remove.

[0087] In this embodiment, the laminated sheet SL is housed in the paper packaging bag 10 described above to form a sheet packaging body 100, thereby achieving 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.

[0088] <Method for manufacturing sheet packaging> A method for manufacturing a sheet packaging according to this embodiment will be described with reference to the figures. The method for manufacturing a sheet packaging according to this embodiment is a method for manufacturing a 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.

[0089] 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.

[0090] 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.

[0091] In this embodiment, it is preferable to perform the reinforcement step simultaneously with the sealing material application step. This means that the reinforcement step is performed within the period during which the sealing material application step is performed. In this embodiment, by performing the reinforcement step simultaneously with the sealing material application step in this way, 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. [Examples]

[0092] The present invention will be described in detail below using examples. The examples and comparative examples were evaluated by the following tests.

[0093] <Packaging (Test Specimen)> As a test specimen, a package 100 was prepared in which a sheet laminate SL, consisting of multiple sheets S stacked together, was packaged in a packaging bag 10, as shown in Figure 1.

[0094] [Sheet laminate (packaged material)] The 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 sheets, basis weight 14.5g / 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.

[0095] [Paper packaging bag] Packaging bag 10, basis weight 50g / m² 2The 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).

[0096] <Tear in the packaging bag upon opening> For the test specimens, the tearing of the packaging bag was checked and evaluated when the opening was opened by tearing along the designated tear line. [Evaluation Criteria] Excellent: Easy to open and didn't tear. Good: It was difficult to open, but it didn't tear. Unacceptable: Torn

[0097] <Tearing of the sheet when removing it> For the test specimens, we checked and evaluated the tearing of the sheet when removing it from the dispensing opening. [Evaluation Criteria] Excellent: Easy to take out from the first sheet and didn't tear. Good: The first sheet was difficult to remove, but it didn't tear. Defect: The first sheet was torn.

[0098] <Tear in the packaging bag when removing the sheet> For the test specimens, we checked and evaluated whether the packaging bag tore when the sheet was removed from the dispenser. [Evaluation Criteria] Excellent: Easy to take out from the first sheet and didn't tear. Good: The first sheet was difficult to remove, but it didn't tear. Defective: Torn

[0099] [Example 1] As shown in Figure 7, a sheet packaging body 100 was manufactured with a straight-lined dispensing opening 20 and reinforcing members positioned to surround the entire dispensing opening 20. The conditions and evaluation results are shown in Table 1.

[0100] [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.

[0101] [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 at the other end 23 of the outlet 20. The conditions and evaluation results are shown in Table 1.

[0102] [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 in the central part 21 of the dispensing opening 20. The conditions and evaluation results are shown in Table 1.

[0103] [Example 5] As shown in Figure 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.

[0104] [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.

[0105] [Example 7] As shown in Figure 14, a sheet packaging 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.

[0106] [Example 8] As shown in Figure 15, a sheet packaging 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.

[0107] [Comparative Example 1] As shown in Figure 10, 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.

[0108] [Comparative Example 1] As shown in Figure 17, the sheet packaging 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.

[0109] [Table 1]

[0110] 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.

[0111] 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.

[0112] 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.

[0113] Although embodiments of the present invention have been described above, the present invention 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. [Explanation of Symbols]

[0114] 100-sheet package 10 Paper packaging bags (paper base material) 10A edge 10B edge 11 Top surface 11A surface 11B Back side 12. Base 13 Front 14 Back 15 Side view 16 Side view 20 Outlet M Cut line for cleavage 30. Seal section (front seal) 40. Seal section (side seal) 50. Seal section (side seal) 60, 61, 62 Reinforcement members S Seat SL sheet laminate SD stacking direction

Claims

1. A paper packaging bag that contains a sheet laminate, which is made up of multiple sheets stacked together, A tear line is provided to form an opening for removing the sheet from the aforementioned paper packaging bag, The outlet has a reinforcing member provided around at least a portion of it, Paper packaging bag.

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

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

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

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

6. The aforementioned paper packaging bag is caramel-wrapped. The paper packaging bag according to claim 1.

7. A paper packaging bag according to any one of claims 1 to 6, The sheet laminate contained in the aforementioned paper packaging bag, Sheet packaging.

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, A sealing material application step involves applying a sealing material to the sealing portion that seals the paper packaging bag while the sheet laminate is packaged, The process includes a reinforcing step of providing a reinforcing member around at least a portion of the outlet, The reinforcement step is performed simultaneously with the sealing material application step. A method for manufacturing sheet packaging.

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