JP7513536B2 - Sheet packaging - Google Patents

Description

The present invention relates to a sheet packaging body.

Sheet packages containing sheets such as paper towels and tissue paper are distributed and used with multiple sheets contained in a packaging bag made of resin film. The packaging bag of the sheet package has perforations formed therein, and the package is opened by tearing the perforations. The opened portion of the packaging bag forms the outlet for the sheets (for example, Patent Documents 1 and 2).

In recent years, from the viewpoint of reducing environmental burdens such as global warming due to _CO2 emissions and marine pollution due to microplastics, there has been a movement to shift the material of packaging bags in sheet packaging bodies from resin to paper.

JP 2008-183034 A JP 2018-177364 A

However, because paper packaging bags are less flexible than plastic packaging bags, if the packaging bag for the sheet package is made of paper, the opening may tear or the sheet may fall into the packaging bag when the sheet is removed.

The objective of the present invention is to provide a sheet package that allows easy removal of the sheet even when the packaging bag is made of paper.

The first aspect of the present invention is a sheet packaging body having a packaging bag with a top surface and a pair of side surfaces facing each other in the longitudinal direction, which contains a plurality of stacked sheets, an outlet formed on the top surface through which the sheets are taken out, and a seal portion formed in the center of the height direction of each of the side surfaces and extending in the width direction, the packaging bag having a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one surface of the paper layer, the ratio of the paper component in the packaging bag being 50% or more, the outlet having a first tearing score line formed between a pair of longitudinal edges of the top surface, and a second tearing score line formed between the edges and the seal portion, continuous with the first tearing score line, the second tearing score line being bent in the width direction.

In this specification, a resin layer provided on at least one side of a paper layer refers to either a structure in which a resin layer is provided on one side of a paper layer (two-layer structure) or a structure in which resin layers are laminated on both sides of a paper layer (three-layer structure).

The splitting score line is a score line where cuts and ties (the uncut portion between two cuts) are arranged alternately, and when a tie breaks, the adjacent cuts become a continuous cut. Bending is not limited to bending in a straight line at a specified angle, but also includes bending in a curved shape. The bent portion may be all or part of the second splitting score line.

In the first aspect, a packaging bag is used that has a paper layer containing a paper component and a resin layer provided on at least one side of the paper layer, and the ratio of the paper component in the packaging bag is 50% or more, thereby providing a sheet packaging body in which a sheet is contained and that is imparted with flexibility. In addition, in the first aspect, since the ratio of the paper component in the packaging bag is 50% or more, a sheet packaging body with reduced environmental impact can be provided.

In addition, the outlet formed on the top surface of such a packaging bag has a first tearing score line formed on the top surface and a second tearing score line formed between the edge of the top surface and the seal portion and bending in the width direction, making it easier to remove the sheet from the outlet. Therefore, in the first aspect, the sheet is less likely to get stuck in the outlet, and the outlet can be prevented from tearing.

In the first aspect, the outlet has a first tearing score line formed on the top surface and a second tearing score line formed between the edge of the top surface and the seal portion and bending in the width direction, making it easier for the sheet to be held at the outlet. Therefore, in the first aspect, the sheet is prevented from falling into the packaging bag and is easier for the sheet to stand up at the outlet.

In addition, in the first aspect, the packaging bag has a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one side of the paper layer, which makes the packaging bag soft. This makes it possible to reduce the stiffness of the packaging bag in the sheet packaging body and to impart conformability to the packaging bag. Therefore, even if the material of the packaging bag is shifted from resin to paper, it is possible to provide a sheet packaging body in which the packaging bag is less likely to tear during manufacturing or transportation.

In addition, in the first aspect, since the resin layer provided on at least one of the surfaces of the paper layer contains a thermoplastic resin, by heating a part of the packaging bag when sealing (or sealing) the packaging bag, the melted resin layer can function as an adhesive (have an adhesive function). Therefore, in the first aspect, it is possible to provide a sheet packaging body that allows the packaging bag to be easily sealed.

The second aspect of the present invention is a sheet packaging body in which the second tearing score line is spaced apart from the sealed portion. Spaced apart here means that the second tearing score line is located in a position that is not connected to the sealed portion.

In the second aspect, the second tearing score line is spaced from the sealed portion, so that both ends of the opened outlet are positioned so that they are not connected to the sealed portion. This prevents the outlet from widening too much, making it easier to pull out the sheet from the outlet while also making it easier for the sheet to be held in the outlet.

The third aspect of the present invention is a sheet packaging body in which a portion of the second tear score line on the side of the first tear score line extends along the height direction. In this specification, extending along the height direction means that a portion of the second tear score line on the side of the first tear score line extends in a direction along the end surface in the height direction.

In the third aspect, a portion of the second tearing score line on the side of the first tearing score line extends along the height direction, widening the outlet while making both ends of the outlet more likely to flex. This makes it easier to pull the sheet out of the outlet while also making it easier to hold the sheet in the outlet.

A fourth aspect of the present invention is a sheet packaging body in which the second tear score line is folded back toward the first tear score line. In this specification, "folded back" means that the end of the second tear score line farther from the first tear score line extends toward the first tear score line. In the fourth aspect, by folding back the second tear score line toward the first tear score line, both ends of the outlet are less likely to tear.

A fifth aspect of the present invention is a sheet packaging body, in which the paper layer has a basis weight of 10 g/m ² or more and 40 g/m ² or less. In the fifth aspect, by setting the basis weight of the paper layer to 10 g/m ² or more and 40 g/m ² or less, the strength of the packaging bag can be maintained. Therefore, according to the fifth aspect, a sheet packaging body in which the packaging bag is less likely to tear can be provided.

The sixth aspect of the present invention is a sheet packaging body in which the paper layer is formed of kraft paper or rayon paper. In this specification, kraft paper refers to paper made from kraft pulp. Rayon paper refers to kraft pulp mixed with rayon fiber, which is chemically synthesized from wood pulp or the like. From the viewpoint of achieving both softness and strength in the packaging bag, it is preferable that the rayon fiber content of the rayon paper is 20% or less by mass.

In the sixth aspect, the paper layer of the packaging bag is made of kraft paper or rayon paper, providing a sheet packaging body that maintains the strength of the packaging bag.

The seventh aspect of the present invention is a sheet packaging body in which the thickness of the resin layer is 5 μm or more and 40 μm or less. In the seventh aspect, by making the thickness of the resin layer of the packaging bag 5 μm or more and 40 μm or less, it becomes easier to maintain the ratio of paper components in the packaging bag at 50% or more. In addition, it is possible to provide a sheet packaging body in which the adhesive function of the resin layer is maintained when the packaging bag is sealed while suppressing the stiffness of the packaging bag.

The eighth aspect of the present invention is a sheet packaging body in which the thermoplastic resin is low-density polyethylene. In the eighth aspect, by using low-density polyethylene as the thermoplastic resin contained in the resin layer, it is possible to provide a sheet packaging body that further suppresses the stiffness of the packaging bag while improving the adhesive function of the resin layer when the packaging bag is sealed.

A ninth aspect of the present invention is a sheet packaging body in which the packaging bag is a pillow packaging bag. In this specification, a pillow packaging bag refers to a packaging bag in which the open end of a tubular packaging bag sheet is sealed. In the ninth aspect, by configuring the packaging bag as a pillow packaging bag, it is easy to form a seal portion that extends in the width direction, and it is easy to form a second tearing score line that bends in the width direction.

The tenth aspect of the present invention is a sheet packaging body in which the resin layer is disposed inside the packaging bag and the seal portion is heat-sealed. In this specification, heat-sealing refers to heating a part of the packaging bag sheet to weld the parts of the packaging bag sheet together.

In the tenth aspect, the packaging bag is a pillow packaging bag, and the resin layers are placed inside the packaging bag and the sealing portion is heat-sealed to bond the resin layers together. This makes it possible to effectively utilize the adhesive function of the resin layers, and therefore to seal the packaging bag without using adhesive.

According to one aspect of the present invention, it is possible to provide a sheet package that is easy to remove the sheet from, even when the packaging bag is made of paper.

FIG. 2 is a diagram showing a sheet wrapping body according to the first embodiment. FIG. 2 is a diagram showing a sheet contained in a packaging bag. 2 is a view of the sheet packaging body of FIG. 1 as seen from the top side. 2 is a view of the sheet packaging body of FIG. 1 as seen from the bottom side. FIG. FIG. 2 is a front view of the sheet wrapping body of FIG. 1 . FIG. 2 is a view of the sheet wrapping body of FIG. 1 as seen from the rear side. 2 is a view of the sheet wrapping body of FIG. 1 as seen from the left side. FIG. 2 is a view of the sheet wrapping body of FIG. 1 as seen from the right side. FIG. 4 is a partial cross-sectional view of the top surface (two-layer structure) in region R1 of FIG. 3. 4 is a partial cross-sectional view of the top surface (three-layer structure) in region R1 of FIG. 3. FIG. 4 is a partial enlarged view of a region R2 in FIG. 3 . FIG. 12 is a cross-sectional view of a sheet (two-layer structure) taken along the tearing score line of FIG. 11 . FIG. 12 is a cross-sectional view of a sheet (three-layer structure) taken along the tearing score line of FIG. 11 . FIG. 1 is a diagram showing an example of a tool for forming a tearing score line in a packaging bag. 4 is a diagram showing a state in which the sheet packaging body of FIG. 3 is torn along a tear score line. FIG. FIG. 2 is a diagram showing a state in which the sheet wrapping body of FIG. 1 is in use. FIG. 11 is a view of the sheet wrapping body of the second embodiment as viewed from the left side. FIG. 11 is a view of the sheet wrapping body of the second embodiment as viewed from the right side. FIG. 11 is a view of the sheet wrapping body of the third embodiment as viewed from the left side. FIG. 11 is a view of the sheet wrapping body of the third embodiment as viewed from the right side.

The embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, common parts may be given the same reference numerals and description thereof may be omitted. In each drawing, the scale of each member may differ from the actual scale. In each drawing, a three-dimensional Cartesian coordinate system with three axial directions (X direction, Y direction, Z direction) is used, and the longitudinal direction of the packaging bag is defined as the X direction, the width direction is defined as the Y direction, and the height direction (vertical direction or thickness direction) is defined as the Z direction.

Figure 1 is a diagram showing a sheet packaging body of the first embodiment. Figure 2 is a diagram showing a sheet contained in a packaging bag. Figures 3, 4, 5, 6, 7, and 8 are views of the sheet packaging body of Figure 1 as seen from the top, bottom, front, back, left side, and right side, respectively.

As shown in FIG. 1, the sheet packaging body 100 has a packaging bag 10 and a sheet stack 20 (multiple sheets S). The sheet packaging body 100 is an example of a sheet packaging body according to this embodiment. The packaging bag 10 is an example of a packaging bag in the sheet packaging body of this embodiment. The sheet stack 20 is an example of multiple sheets stacked in the sheet packaging body of this embodiment.

As shown in FIG. 2, the packaging bag 10 contains multiple stacked sheets (or multiple sets) of sheets S (sheet stack 20). The sheet stack 20 is contained in the packaging bag 10 so that the stacking direction (SD direction) of the sheets S is the height direction (Z direction). The sheet stack 20 is designed so that the sheets S can be pulled out one by one (one set) through an outlet 30 (opening OP) (described later) formed in the packaging bag 10 (see FIG. 16).

The form of the stack SL of sheets S (sheet stack 20) is not particularly limited, and may be, for example, a stack of sheets S in a folded state, a stack of sheets S in a folded and alternating state (a so-called pop-up type sheet stack), or a stack of multiple sheets S simply stacked.

The dimensions of the sheet S (sheet stack 20) can be such that the length L2 in the longitudinal direction (X direction) of the packaging bag 10 is approximately 150 to 260 mm, the width W2 in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 10 is approximately 70 to 150 mm, and the height H2 in the height direction (Z direction) is approximately 20 to 100 mm. Such a tissue paper stack can be manufactured, for example, by a rotary or multi-stand interfolder.

The form of the sheet S is not particularly limited, and it can be applied to, for example, sanitary thin papers such as paper towels, kitchen paper, tissue paper, and toilet paper. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissue, etc.).

The use of the sheet S is not particularly limited, and it can be used for industrial, household, or portable purposes. Among these, the sheet in this embodiment is preferably used as a paper towel for industrial or household use.

The number of plies of the sheet S is not particularly limited, but can be one or more plies, and is preferably one or two plies (two plies stacked). The shape of the sheet S is also not particularly limited, but it is preferable that the outline shape of the sheet when folded is quadrangular (rectangle, square, etc.).

The material of the sheet S is not particularly limited, but may be, for example, a sheet of paper, nonwoven fabric, or cloth, and is preferably paper (paper sheet). When the sheet S is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be a known composition for paper sheets. For example, the pulp content may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The pulp composition in the sheet S (paper sheet) is not particularly limited. For example, any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used. The ratio of hardwood pulp to softwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably, the ratio of softwood pulp to hardwood pulp is higher in the pulp composition. The pulp contained in the sheet S (paper sheet) may be recycled paper pulp.

The basis weight of the sheet S is not particularly limited, but in the case of paper, it is 5 g/m ² or more and 80 g/m ² or less, preferably 10 g/m ² or more and 60 g/m ² or less, more preferably 10 g/m ² or more and 45 g/m ² or less, depending on the number of plies. In addition, in the case of nonwoven fabric, it is desirable that it is 20 g/m ² or more and 100 g/m ² or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

The thickness (paper thickness) of the sheet S (paper sheet) is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, when the sheet S is paper, the paper thickness is 50 μm or more and 600 μm or less per ply, preferably 60 μm or more and 550 μm or less, and more preferably 100 μm or more and 400 μm or less.

The sheet S (paper sheet) may also be embossed. Such embossing can be performed using a known embossing method.

Figure 9 is a partial cross-sectional view of the top surface in region R1 of Figure 3. The packaging bag 10 has a paper layer 10A containing a paper component, and a resin layer (resin layer 10B, or resin layers 10B and 10C) containing a thermoplastic resin provided on at least one surface of the paper layer 10A (Figures 9 and 10). The ratio of the paper component in the packaging bag 10 is 50% or more.

Here, the paper component is, for example, plant fibers bonded together (pulp). The pulp composition of the paper component is not limited, but is preferably a pulp composition in which the ratio of softwood pulp to hardwood pulp is higher. In addition, recycled paper pulp may be used as the pulp.

In this embodiment, the resin layer provided on at least one side of the paper layer 10A has, for example, a structure in which a resin layer 10B is provided on one side of the paper layer 10A (two-layer structure) (Figure 9), or a structure in which resin layers 10B and 10C are laminated on both sides of the paper layer 10A (three-layer structure) (Figure 10).

The material of the paper layer 10A that constitutes the packaging bag 10 is not particularly limited, but it can be made of, for example, kraft paper or rayon paper. Here, kraft paper is paper made from kraft pulp. Rayon paper is made by blending rayon fiber, which is chemically synthesized from wood pulp, into kraft pulp. From the viewpoint of achieving both softness and strength in the packaging bag 10, it is preferable that the rayon fiber blending ratio of the rayon paper is 20% or less by mass.

The basis weight of the paper layer 10A constituting the packaging bag 10 is not limited, but is preferably 10 g/m ² or more and 40 g/m ² or less, more preferably 15 g/m ² or more and 35 g/m ² or less, and even more preferably 20 g/m ² or more and 30 g/m ² or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

The thickness of the packaging bag 10 (paper layer 10A) is not limited, but is preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 90 μm or less, and even more preferably 40 μm or more and 75 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

The material of the thermoplastic resin contained in the resin layers 10B and 10C that make up the packaging bag 10 is not particularly limited, but is preferably low-density polyethylene. The low-density polyethylene may be either high-pressure low-density polyethylene (LDPE) or linear low-density polyethylene (L-LDPE).

The thickness of the resin layers 10B and 10C constituting the packaging bag 10 is not limited, but is preferably 5 μm or more and 40 μm or less, more preferably 7 μm or more and 35 μm or less, and even more preferably 9 μm or more and 30 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

The basis weight of the packaging bag 10 is not limited, but is preferably 20 g/m ² or more and 70 g/m ² or less, more preferably 25 g/m ² or more and 65 g/m ² or less, and even more preferably 30 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).

The thickness of the packaging bag 10 is not limited, but is, for example, 25 μm or more and 105 μm or less, preferably 30 μm or more and 95 μm or less, and more preferably 45 μm or more and 80 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

The density of the packaging bag 10 is not limited, but is, for example, 0.1 g/m ³ or more and 1.5 g/m ³ or less and 0.3 g/m ³ or more and 1.2 g/m ³ or less, and more preferably 0.5 g/m ³ or more and 0.9 g/m ³ or less. The density is measured in accordance with the provisions of JIS P 8118 (2014).

The tensile strength of the packaging bag 10 is not limited, but may be, for example, 1 kN/m to 6 kN/m, preferably 1.3 kN/m to 5.5 kN/m, more preferably 1.5 kN/m to 5 kN/m, in the longitudinal direction (flow direction) of the fibers, and 0.1 kN/m to 2.5 kN/m, preferably 0.2 kN/m to 2.4 kN/m, more preferably 0.3 kN/m to 2.3 kN/m, in the transverse direction (direction perpendicular to the flow direction). The tensile strength is measured in accordance with the provisions of JIS P 8113 (2006).

The tensile strength is measured in accordance with the provisions of JIS P 8113 (2006). The vertical direction of the packaging bag corresponds to the flow direction of the fibers that make up the packaging bag, and the horizontal direction of the packaging bag corresponds to the direction perpendicular to the flow direction of the fibers that make up the packaging bag.

The tear strength of the packaging bag 10 is not limited, but is, for example, 70 mN to 350 mN, preferably 80 mN to 340 mN, more preferably 90 mN to 330 mN, in the longitudinal direction (flow direction) of the fibers, and 250 mN to 950 mN, preferably 280 mN to 930 mN, more preferably 300 mN to 920 mN, in the transverse direction (direction perpendicular to the flow direction). The tear strength is measured in accordance with the provisions of JIS P 8116 (2000).

The softness of the packaging bag 10 is not limited, but may be, for example, 90 mN/100 mm or more and 800 mN/100 mm or less, preferably 110 mN/100 mm or more and 750 mN/100 mm or less, more preferably 130 mN/100 mm or more and 730 mN/100 mm or less, in the longitudinal direction (flow direction) of the fibers, and 40 mN/100 mm or more and 330 mN/100 mm or less, preferably 50 mN/100 mm or more and 310 mN/100 mm or less, more preferably 60 mN/100 mm or more and 310 mN/100 mm or less, in the transverse direction (direction perpendicular to the flow direction).

The softness was measured using the handle-o-meter method in accordance with JIS L 1096 E. The test pieces were 100 mm x 100 mm in size, with a clearance of 5 mm. The softness was measured five times in each of the longitudinal and transverse directions for one ply, and the average of the five measurements was rounded to one decimal place and expressed in units of mN.

The Clark stiffness of the packaging bag 10 is not particularly limited, but the Clark stiffness in the longitudinal direction is preferably ³ cm3/100 or more and 20 ^cm3 /100 or less, more preferably 4 ^cm3 /100 or more and 18 ^cm3 /100 or less, and even more preferably 5 ^cm3 /100 or more and 16 ^cm3 /100 or less. The Clark stiffness is measured in accordance with the provisions of JIS P 8143.

The packaging bag 10 has a top surface 11, a bottom surface 12, side surfaces 13 and 14, end surfaces 15 and 16. In the packaging bag 10, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the side surfaces 13 and 14 face each other in the width direction (Y direction), and the end surfaces 15 and 16 face each other in the longitudinal direction (X direction). The top surface is an example of a top surface in the sheet packaging body of this embodiment. The end surfaces 15 and 16 are an example of a pair of side surfaces facing each other in the longitudinal direction in the sheet packaging body of this embodiment.

The top surface 11 and the bottom surface 12 are connected via a seal portion 40 on the end surface 15 side, and via a seal portion 50 on the end surface 16 side. The seal portion 40 is formed in the center portion 15A in the height direction (Z direction) of each end surface 15, and extends in the width direction (Y direction) (Figs. 5 to 7). The seal portion 50 is formed in the center portion 16A in the height direction (Z direction) of each end surface 16, and extends in the width direction (Y direction) (Figs. 5, 6, and 8).

The dimensions of the packaging bag 10 are arbitrary, and for example, the length L1 in the longitudinal direction (X direction) of the packaging bag 10 can be about 150 to 260 mm, the width W1 in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 10 can be about 70 to 150 mm, and the height H1 in the height direction (Z direction) can be about 20 to 100 mm. Note that these dimensions of the packaging bag 10 indicate the dimensions when the sheet laminate 20 is contained in the packaging bag 10.

In the sheet packaging body 100 of this embodiment, the packaging bag 10 is configured as a pillow packaging bag having a pair of seal portions 40, 50 at both ends in the longitudinal direction (X direction). Specifically, the seal portions (end seals) 40, 50 are formed on the end faces 15, 16 of the packaging bag 10, and the seal portion (bottom seal) 60 is formed on the bottom surface 12 of the packaging bag 10, and the sheet S (sheet stack 20) is pillow packaged.

Here, the pillow packaging bag is formed by processing a packaging bag sheet (not shown) into a cylindrical shape and sealing the open end of the cylindrical packaging bag sheet. In this embodiment, the cylindrical packaging bag sheet that constitutes the packaging bag 10 may be folded into a gusset shape.

The configuration of the sealing portions 40, 50, and 60 is not particularly limited. For example, if the packaging bag 10 is composed only of the paper layer 10A, the sealing portions 40, 50, and 60 can be bonded with an adhesive (not shown) (Figure 9).

In addition, the packaging bag 10 has the seal portions 40, 50, and 60 heat-sealed. Here, heat-sealing refers to heating parts of the packaging bag sheet to weld parts of the packaging bag sheet together.

Specifically, in the two-layered packaging bag (pillow packaging bag) 10 shown in FIG. 9, the seal portions 40, 50, and 60 are heat-sealed with the resin layer 10B disposed on the inside or outside of the packaging bag 10. In the three-layered packaging bag (pillow packaging bag) 10 shown in FIG. 10, the seal portions 40, 50, and 60 are heat-sealed with either the resin layer 10B or the resin layer 10C disposed on the inside of the packaging bag 10.

The heating temperature for heat welding is arbitrary. For example, in the two-layer structure shown in FIG. 9, in which the resin layer 10B is disposed on the outside of the packaging bag 10, the seal portions 40 and 50 are sealed with an adhesive, and the temperature is adjusted to a temperature at which the adhesive is welded.

In addition, in the case of the two-layer structure shown in FIG. 9 in which resin layer 10B is disposed on the inside of packaging bag 10, and in the case of the three-layer structure shown in FIG. 10 in which either resin layer 10B or 10C is disposed on the inside of packaging bag 10, the temperature is preferably adjusted to 140°C or higher and 180°C or lower, more preferably 140°C or higher and 170°C or lower, and even more preferably 140°C or higher and 160°C or lower.

The top surface 11 of the packaging bag 10 is formed with an outlet 30 through which the sheet S is taken out. The outlet 30 has a first tearing score line 31 and second tearing score lines 32, 33. Here, the tearing score line indicates a score line where cuts C and ties T (two cuts C and the uncut portion between C) are arranged alternately, and when a tie T is broken, the adjacent cuts C on both sides become continuous cuts (Figs. 1, 3, 7, 8, 11).

Figure 11 is a partial enlarged view of region R2 in Figure 3. The tearing score lines 31-33 are composed of straight perforations M with alternating cuts C and ties T (Figures 1, 3, 7, 8, and 11). In the packaging bag 10, tearing the perforations M forms openings OP through which the sheet S can be pulled out in parts of the top surface 11 and end surfaces 15 and 16 of the packaging bag 10 (Figures 3, 7, 8, and 15).

The shape of the tearing score lines 31-33 is not particularly limited, but in the case of a configuration in which a resin layer 10B is provided on one side of a paper layer 10A (two-layer structure), it is preferable that the cuts C of the tearing score lines 31-33 penetrate the paper layer 10A and the resin layer 10B (Figures 9 and 12). Here, penetrating the paper layer 10A and the resin layer 10B means that the cuts C of the tearing score lines 31-33 penetrate the laminated paper layer 10A and the resin layer 10B in the thickness direction (Figure 12).

In addition, in the case of a structure in which resin layers 10B, 10C are laminated on both sides of a paper layer 10A (three-layer structure), it is preferable that the cuts C of the tearing score lines 31-33 penetrate the paper layer 10A and the resin layers 10B, 10C (Fig. 10, Fig. 13). Here, penetrating the paper layer 10A and the resin layers 10B, 10C means that the cuts C of the tearing score lines 31-33 penetrate the laminated paper layer 10A and the resin layers 10B, 10C in the thickness direction (Fig. 13).

The length D1 of the cuts C on the tearing score lines 31 to 33 is not particularly limited, but is preferably 3 mm or more and 8 mm or less, more preferably 2 mm or more and 7.5 mm or less, and even more preferably 2.5 mm or more and 7 mm or less. Here, the length of the cut refers to the length of each cut C on the tearing score lines 31 to 33.

The length of the ties T at the tearing cut lines 31 to 33 is not particularly limited, but is preferably 0.3 mm to 2.5 mm, more preferably 0.5 mm to 1.5 mm, and even more preferably 0.8 mm to 1.2 mm. Here, the length of the ties refers to the length of each tie T at the tearing cut lines.

In this embodiment, the ratio of cuts C in the tearing score lines 31-33 is not particularly limited, but is preferably 60% to 95%, more preferably 65% to 90%, and more preferably 70% to 85%. The cut ratio indicates the ratio of the length D1 of cut C to the sum of the lengths D1 and D2 of adjacent cuts C and ties T in the tearing score lines 31-33.

The tearing score lines 31-33 can be made by any method, for example, using the tool 90 shown in FIG. 14. Specifically, the packaging bag 10 (packaging bag sheet) is placed between the needle part 91 and the base part 92 of the tool 90, and the tip 91A of the needle part 91 is pierced toward the receiving groove 92A of the base part 92, thereby forming the tearing score lines 31-33.

In addition, in the sheet packaging body 100, a ventilation hole (not shown) may be formed in the packaging bag 10. The ventilation hole can function as an air hole in the packaging bag 10. The method for making the ventilation hole is arbitrary, and for example, the same method as the method for making the tearing score lines 31 to 33 described above can be used.

The position of the ventilation hole is not limited, and for example, the ventilation hole can be provided on the side surfaces 13 and 14 of the packaging bag 10. The number of ventilation holes is not limited, and multiple ventilation holes can be provided. The shape of the ventilation hole is not limited, and for example, it can be circular in a plan view. The size of the ventilation hole is not limited, and for example, it can be about 2 mm in diameter.

In the sheet packaging body 100 of this embodiment, the tear score line 31 is formed between a pair of edges 11A, 11B in the longitudinal direction (X direction) of the top surface 11. In this embodiment, the length L3 of the tear score line 31 corresponds to the distance L1 between the pair of edges 11A, 11B of the top surface 11 of the packaging bag 10 (FIG. 3). The tear score line 31 is an example of a first tear score line in the sheet packaging body of this embodiment.

The tearing score line 32 is continuous with the tearing score line 31 on the end face 15 side, and is formed between the edge 11A of the top face 11 and the seal portion 40. The tearing score line 33 is continuous with the tearing score line 31 on the end face 16 side, and is formed between the edge 11B of the top face 11 and the seal portion 50. The tearing score lines 32 and 33 are an example of a second tearing score line in the sheet packaging body of this embodiment.

In this embodiment, the tearing score line 32 bends in the width direction (Y direction) on the end face 15 side. The tearing score line 33 bends in the width direction (Y direction) on the end face 16 side. Specifically, for example, the tearing score lines 32, 33 may bend in a straight line at a predetermined angle, or the tearing score lines 32, 33 may bend in a curved shape.

The tear score lines 32, 33 may be bent entirely or partially. In this embodiment, the tear score lines 32, 33 have straight portions 32B, 33B on the seal portion 40, 50 side inclined at a predetermined angle to the straight portions 32A, 33A on the tear score line 31 side (Figs. 7 and 8).

In the sheet packaging body 100 of this embodiment, the tearing score line 32 is spaced apart from the sealed portion 40. Also, the tearing score line 33 is spaced apart from the sealed portion 50. Specifically, the tearing score line 32 is located at a position that is not connected to the sealed portion 40 of the end surface 15. Also, the tearing score line 33 is located at a position that is not connected to the sealed portion 50 of the end surface 16 (FIGS. 1, 7, and 8).

In the sheet packaging body 100, when viewed in the direction AD1 along the height direction (Z direction) of the end face 15, the distance E2 of the tearing score line 32 is shorter than the distance E1 between the edge 11A of the top face 11 and the seal portion 40 (Figs. 5 to 7). Also, when viewed in the direction AD2 along the height direction (Z direction) of the end face 16, the distance E4 of the tearing score line 33 is shorter than the distance E3 between the edge 11B of the top face 11 and the seal portion 50 (Figs. 5, 6, and 8).

The ratio of the spacing E2 of the tearing score lines 32 is not particularly limited, but is preferably 20-95%, more preferably 25-93%, and even more preferably 30-90% of the spacing E1 between the edge 11A of the top surface 11 and the seal portion 40. The ratio of the spacing E4 of the tearing score lines 33 is not particularly limited, but is preferably 20-95%, more preferably 25-93%, and even more preferably 30-90% of the spacing E1 between the edge 11B of the top surface 11 and the seal portion 50.

In addition, in the sheet packaging body 100 of this embodiment, a portion 32A of the tearing score line 32 on the tearing score line 31 side extends along the height direction (Z direction). Also, a portion 33A of the tearing score line 33 on the tearing score line 31 side extends along the height direction (Z direction).

In this embodiment, a portion 32A of the splitting cut line 32 extends in a direction AD1 along the end face 15 in the height direction (Z direction). Also, a portion 33A of the splitting cut line 32 extends in a direction AD2 along the end face 16 in the height direction (Z direction) (Figures 5 to 8).

In this embodiment, as described above, by using a packaging bag 10 having a paper layer 10A containing a paper component and a resin layer (resin layer 10B, or resin layers 10B, 10C) provided on at least one side of the paper layer 10A, in which the ratio of the paper component is 50% or more, a sheet packaging body 100 can be provided in which the packaging bag 10 containing the sheet S is given flexibility (Figures 9 and 10). In addition, in this embodiment, since the ratio of the paper component in the packaging bag 10 is 50% or more, a sheet packaging body 100 with reduced environmental impact can be provided.

In addition, the outlet 30 formed on the top surface 11 of such a packaging bag 10 has a first tearing score line (tearing score line 31) formed on the top surface 11 and a second tearing score line (tearing score lines 32, 33) that bends in the width direction (Y direction) between the edges 11A, 11B of the top surface 11 and the seal portions 40, 50, making it easier to remove the sheet S from the outlet 30. Therefore, in this embodiment, the sheet S is less likely to get stuck in the outlet 30, and tearing of the outlet 30 can be suppressed (FIGS. 1, 7, 8, 15, 16).

In this embodiment, the outlet 30 has a tearing score line 31 formed on the top surface 11, and tearing score lines 32, 33 formed between the edges 11A, 11B of the top surface 11 and the seal portions 40, 50 and bent in the width direction (Y direction), which makes it easier for the sheet S to be held at the outlet 30. Therefore, in this embodiment, the sheet S is prevented from falling into the packaging bag 10, and the sheet S is easier to stand up at the outlet 30 (Figs. 1, 7, 8, 15, 16).

In addition, in this embodiment, the packaging bag 10 has a paper layer 10A containing a paper component and a resin layer (resin layer 10B, or resin layers 10B and 10C) containing a thermoplastic resin provided on at least one side of the paper layer 10A, so that the packaging bag 10 can be made soft. This makes it possible to suppress the stiffness of the packaging bag 10 in the sheet packaging body 100 and to impart conformability to the packaging bag 10. Therefore, even if the material of the packaging bag 10 is shifted from resin to paper, it is possible to provide a sheet packaging body 100 in which the packaging bag 10 is less likely to tear during manufacturing or transportation (Figures 1, 3, 9, 10, 15, and 16).

In addition, in this embodiment, since the resin layer (resin layer 10B, or resin layer 10B, 10C) provided on at least one side of the paper layer 10A contains a thermoplastic resin, by heating a part of the packaging bag 10 when sealing (or sealing) the packaging bag 10, the melted resin layer (resin layer 10B, or resin layer 10B, 10C) can function as an adhesive (have an adhesive function). Therefore, in this embodiment, it is possible to provide a sheet packaging body 100 that allows the packaging bag 10 to be easily sealed (Fig. 1, Figs. 3 to 10).

In this embodiment, as described above, the second tearing score lines (tearing score lines 32, 33) are spaced apart from the sealed portions 40, 50, so that both ends (ends 30A, 30B) of the opened outlet 30 are positioned so as not to be connected to the sealed portions 40, 50. This prevents the outlet 30 from widening too much, making it easier to pull out the sheet S from the outlet 30 while also making it easier to hold the sheet S in the outlet 30 (Figs. 1, 7, 8, 15, 16).

In this embodiment, portions 32A, 33A of the second tearing score line (tearing score lines 32, 33) on the first tearing score line (tearing score line 31) side extend in directions AD1, AD2 along the height direction (Z direction), widening the outlet 30 and making both ends (ends 30A, 30B) of the outlet 30 more likely to flex. This makes it easier to pull out the sheet S from the outlet 30 and makes it easier to hold the sheet S in the outlet 30 (Figures 15 and 16).

In this embodiment, as described above, by setting the basis weight of the paper layer 10A to be 10 g/ ^m2 or more and ⁴⁰ g/m2 or less, it is possible to maintain the strength of the packaging bag 10. Therefore, according to this embodiment, it is possible to provide a sheet packaging body 100 in which the packaging bag 10 is less likely to tear.

In this embodiment, as described above, by forming the paper layer 10A of the packaging bag 10 from kraft paper or rayon paper, it is possible to provide a sheet packaging body 100 that maintains the strength of the packaging bag 10.

In this embodiment, by setting the thickness of the resin layer (resin layer 10B, or resin layer 10B, 10C) of the packaging bag 10 to 5 μm or more and 40 μm or less, it becomes easier to maintain the ratio of paper components in the packaging bag 10 at 50% or more. In addition, it is possible to provide a sheet packaging body 100 in which the adhesive function of the resin layer (resin layer 10B, or resin layer 10B, 10C) is maintained when the packaging bag 10 is sealed while suppressing the stiffness of the packaging bag 10.

In this embodiment, as described above, by using low-density polyethylene as the thermoplastic resin contained in the resin layer (resin layer 10B, or resin layer 10B, 10C), it is possible to provide a sheet packaging body 100 that further reduces the stiffness of the packaging bag 10 while improving the adhesive function of the resin layer (resin layer 10B, or resin layer 10B, 10C) when sealing the packaging bag 10.

In this embodiment, as described above, by configuring the packaging bag 10 as a pillow packaging bag, it is easy to form the seal portions 40, 50 that extend in the width direction (Y direction), and it is easy to form the second tearing score lines (tearing score lines 32, 33) that bend in the width direction (Y direction) (Figures 1, 3 to 8).

In this embodiment, as described above, the packaging bag 10 is a pillow packaging bag, and the resin layers (resin layer 10B, or resin layers 10B, 10C) are disposed inside the packaging bag 10, and the sealing portions 40, 50 are heat-sealed to bond the resin layers together. This makes it possible to effectively utilize the adhesive function of the resin layer (resin layer 10B, or resin layers 10B, 10C), and therefore the packaging bag 10 can be sealed without using adhesive (Figs. 1, 3 to 8).

Figure 17 is a view of the sheet wrapping body of the second embodiment as seen from the left side, and Figure 18 is a view of the sheet wrapping body of the second embodiment as seen from the right side. In Figures 17 and 18, parts common to the first embodiment are given the same reference numerals as in Figures 7 and 8, and descriptions thereof will be omitted.

In the sheet packaging body 100 of the second embodiment, there is no linear portion 32A extending in the directions AD1 and AD2 along the height direction (Z direction). Specifically, the tearing score line 32 is composed of inclined linear portions 32B and 33B (Figures 7 and 8).

In the second embodiment, the tearing cut line 32 does not have the straight portions 32A extending in the directions AD1 and AD2 along the height direction (Z direction), but only has the inclined straight portions 32B and 33B, so the outlet 30 does not widen too much (Figures 17 and 18). This makes it easier to pull out the sheet S from the outlet 30, while also making it easier for the sheet S to be held in the outlet 30.

Figure 19 is a view of the sheet wrapping body of the third embodiment as seen from the left side, and Figure 20 is a view of the sheet wrapping body of the third embodiment as seen from the right side. In Figures 19 and 20, parts common to the first embodiment are given the same reference numerals as in Figures 7 and 8, and descriptions thereof will be omitted.

In the third embodiment of the sheet packaging body 100, the second tear score line (tear score lines 32, 33) is folded back toward the first tear score line (tear score line 31). Specifically, the end 32C of the tear score line 32 that is farther from the tear score line 31 extends toward the tear score line 31 (FIG. 19). Also, the end 33C of the tear score line 33 that is farther from the tear score line 31 extends toward the tear score line 31 (FIG. 20).

In this embodiment, the second tearing score line (tearing score lines 32, 33) is folded back toward the first tearing score line (tearing score line 31), making both ends (ends 30A, 30B) of the outlet 30 less likely to tear (Figures 15 and 16).

The present invention will now be described in more detail with reference to examples. The examples and comparative examples were evaluated using the following tests.

[Test specimen]
A sheet packaging body 100 in which a plurality of sheets S (sheet laminate 20) were pillow-packaged in a packaging bag 10 was prepared as a test specimen (FIGS. 1 to 8). The sheet laminate 20 was a paper towel in which sheets S were folded and laminated (product name "Elver Paper Towel Eco Dry (medium size)", manufactured by Daio Paper Corporation, single type (1 ply), 200 sheets, height H1: 67 mm, length L1: 210 mm, width (depth) W1: 115 mm, basis weight: 30 g/ ^m2 , softness vertical 206 mN/100 mm, softness horizontal 177 mN/100 mm). An outlet 30 (perforation M) was formed in the packaging bag 10.

[Initial removal ability]
The ease of removal (initial removal) was confirmed when removing the first sheet S (one set) of the sheet laminate 20 from the sheet laminate 20 contained in the packaging bag 10 of the sheet packaging body 100 through the opened removal opening 30 (opening OP) of the packaging bag 10. The evaluation was made as ◯ (good) when the sheet S was easy to remove, and × (bad) when the sheet S could be removed but was difficult to remove, or could not be removed at all.

[Tear at the outlet end]
The ends 30A, 30B of the outlet 30 were checked for tears when the sheets S from the first sheet (one set) to the last sheet (one set) of the sheet laminate 20 contained in the packaging bag 10 of the sheet packaging body 100 were pulled out through the opened outlet 30 (opening OP) of the packaging bag 10. The evaluation was made as follows: ◯ (good) when the end 30A or end 30B of the outlet 30 was not torn, and × (bad) when it was torn.

[Orthostatic]
The number of times that the sheets S fell down because they were not held at the outlet 30 was measured when the first sheet (one set) to the last sheet (one set) of the sheet stack 20 contained in the packaging bag 10 of the sheet packaging body 100 was pulled out through the opened outlet 30 (opening OP) of the packaging bag 10 from the sheet stack 20 contained in the packaging bag 10 of the sheet packaging body 100. The evaluation was made as follows: ◯ (good) when the number of times that the sheets fell down was less than 10 sheets (sets), and × (bad) when the number of times that the sheets fell down was 10 sheets (sets) or more.

[Non-depressing]
When the first sheet (one set) to the last sheet (one set) of the sheet laminate 20 contained in the packaging bag 10 of the sheet packaging body 100 were taken out through the opened take-out opening 30 (opening OP) of the packaging bag 10, the number of times that the sheets S fell into the packaging bag 10 without being held at the take-out opening 30 was measured. The evaluation was made as follows: ◯ (good) if the number of times it fell was 3 or less, △ (slightly poor) if it fell 4 to 9 times, and × (poor) if it fell 10 or more times.

The materials used in the examples and comparative examples are explained below.

[Material 1]
The material 1 was constructed by using rayon paper with a basis weight of 30 g/ ^m2 for the paper layer 10A and low-density polyethylene with a thickness of 11 μm for the resin layer 10B. The properties of the material 1 were: basis weight 41.6 g/ ^m2 , thickness 67 μm, density 0.62 g/ ^cm3 , tensile strength vertical 2.75 kN/m, tensile strength horizontal 0.61 kN/m, tear strength vertical 310 mN, tear strength horizontal 3.1 mN, softness surface vertical 329 mN/100 mm, softness surface horizontal 139 mN/100 mm, Clark stiffness vertical 15.4 ^cm3 /100, Clark stiffness horizontal 4.53 ^cm3 /100.

[Material 2]
Material 2 was constructed in the same manner as Material 1, except that the paper layer 10A was made of kraft paper with a basis weight of 30 g/ ^m2 . The properties of Material 2 were: basis weight 41.7 g/ ^m2 , thickness 56 μm, density 0.74 g/ ^cm3 , tensile strength vertical 4.84 kN/m, tensile strength horizontal 1.07 kN/m, tear strength vertical 164 mN, tear strength horizontal 306 mN, softness surface vertical 333 mN/100 mm, softness surface horizontal 154 mN/100 mm, Clark stiffness vertical 14.3 ^cm3 /100, and Clark stiffness horizontal 5.17 ^cm3 /100.

The following describes examples and comparative examples.

[Example 1]
Material 1 is used for packaging bag 10, resin layer 10B is disposed inside packaging bag 10, and outlet 30 is configured with a first tear-open score line (perforation 31) formed on top surface 11 and second tear-open score lines (perforations 32, 33) formed on end surfaces 15, 16. Perforation 31 on top surface 11 is a straight line along the longitudinal direction (X direction) and has a length L3 corresponding to distance L1 between edges 11A, 11B of top surface 11. The perforations 32, 33 on the end faces 15, 16 are composed of linear portions (straight lines) 32A, 33A on the side of the tearing cut line 31 extending in the directions AD1, AD2 along the height direction (Z direction), and linear portions (diagonal straight lines) 32B, 33B that are continuous with the linear lines 32A, 33A, inclined at a predetermined angle (approximately 30° to 60°) with respect to the edges 11A, 11B of the top face 11, and extend toward the sealed parts 40, 50 without connecting to the sealed parts 40, 50. The results are shown in Table 1.

[Example 2]
The perforations 32, 33 on the end faces 15, 16 were not formed as straight lines 32A, 33A extending in the directions AD1, AD2 along the height direction (Z direction), but were formed within a range of 15 mm from the edges 11A, 11B of the top face 11, inclined at a predetermined angle (approximately 30° to 60°) with respect to the edges 11A, 11B, and were formed as parts of straight lines (diagonal straight lines) 32B, 33B extending toward the seal parts 40, 50 without connecting to the seal parts 40, 50. The results are shown in Table 1.

[Example 3]
The perforations 32, 33 on the end faces 15, 16 were made and evaluated in the same manner as in Example 1, except that instead of the diagonal straight lines 32B, 33B, the perforations 32, 33 were folded back toward the first tearing score line (perforation 31) and the ends 32C, 33C of the tearing score lines 32, 33 farther from the tearing score line 31 side were folded back toward the tearing score line 31 side (diagonal folds) 32B, 33B. The results are shown in Table 1.

[Comparative Example 1]
The perforations 32, 33 on the end faces 15, 16 were formed as straight lines 32A, 33A extending from the edges 11A, 11B of the top face 11 to the seal portions 40, 50 in directions AD1, AD2 along the height direction (Z direction) instead of the diagonal straight lines 32B, 33B, and were fabricated and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[Comparative Example 2]
The product was produced and evaluated in the same manner as in Comparative Example 1, except that the length of the straight lines 32A and 33A was set to 15 mm from the edges 11A and 11B of the top surface 11 in the directions AD1 and AD2 along the tearing score line 31 and the height direction (Z direction). The results are shown in Table 1.

[Comparative Example 3]
Except for not forming the perforations 32, 33 on the end faces 15, 16, the product was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 4]
Except for making the length L3 of the perforation 31 of the top surface 11 shorter than the length L1 of the top surface 11 (the perforation 31 of the top surface 11 was formed on the inside between the edges 11A and 11B of the top surface 11), the product was produced and evaluated in the same manner as in Comparative Example 5. The results are shown in Table 1.

[Comparative Example 5]
The product was produced and evaluated in the same manner as in Comparative Example 4, except that the perforation 31 on the top surface 11 had a length L3 that was 30 mm shorter than the length L1 of the top surface 11, and the perforation (diagonal straight line) was inclined at a predetermined angle (approximately 30° to 60°) from the end of the perforation 31 toward the edges 11A and 11B on the top surface 11 and extended from the edges 11A and 11B to a position 15 mm inward on the top surface 11. The results are shown in Table 1.

[Example 4]
The fabrication and evaluation were carried out in the same manner as in Example 1, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Example 5]
The fabrication and evaluation were carried out in the same manner as in Example 2, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Example 6]
The fabrication and evaluation were carried out in the same manner as in Example 3, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Comparative Example 6]
The fabrication and evaluation were carried out in the same manner as in Comparative Example 1, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Comparative Example 7]
The fabrication and evaluation were carried out in the same manner as in Comparative Example 2, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Comparative Example 8]
The fabrication and evaluation were carried out in the same manner as in Comparative Example 3, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Comparative Example 9]
The fabrication and evaluation were carried out in the same manner as in Comparative Example 4, except that Material 2 was used instead of Material 1. The results are shown in Table 2.

[Comparative Example 10]
Except for using Material 2 instead of Material 1, the material was produced and evaluated in the same manner as in Comparative Example 5. The results are shown in Table 2.

From Tables 1 and 2, it can be seen that the test specimens (sheet packaging bodies) in which multiple sheets (laminated sheets) were contained in pillow packaging bags using materials 1 and 2, and the removal opening 30 formed on the top surface 11 of the packaging bag 10 had a first tearing score line (perforation 31) formed on the top surface 11 as a straight line along the longitudinal direction (X direction) having a length L3 corresponding to the distance L1 between the edges 11A and 11B of the top surface 11, and a second tearing score line (perforation 32, 33) formed on the end surfaces 15, 16 as diagonal straight lines 32B, 33B extending from the edges 11A, 11B of the top surface 11 toward the seal portions 40, 50, had good initial removal properties, tearing at the removal opening end, standing up, and non-sagging properties (Examples 1 to 6).

In contrast, sheet packaging in which the second tearing cut lines (perforations 32, 33) formed on the end faces 15, 16 do not have the diagonal straight lines 32B, 33B that are inclined at a predetermined angle (approximately 30° to 60°) to the end edges 11A, 11B (Comparative Examples 1, 2, 6, 7), and sheet packaging in which the second tearing cut lines (perforations 32, 33) on the end faces 15, 16 do not have (Comparative Examples 3 to 5, 8 to 10) have poor initial removal, tearing at the removal opening end, standing up, or non-sagging.

From these results, it was found that a sheet package in which the packaging bag has a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one side of the paper layer, the ratio of the paper component in the packaging bag is 50% or more, the removal opening formed on the top surface of the packaging bag has a first tearing score line formed between a pair of longitudinal edges of the top surface and a second tearing score line formed continuously with the first tearing score line between the edge of the top surface and a seal portion formed in the center of the height direction of the side surface, and the second tearing score line is bent in the width direction, is excellent in sheet removal even when the packaging bag is made of paper.

Although the embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and variations are possible within the scope of the invention described in the claims.

100 Sheet packaging body 10 Packaging bag 10A Paper layer 10B, 10C Resin layer 11 Top surface 11A, 11B Edge 12 Bottom surface 13, 14 Side surface 15, 16 Gable surface (pair of side surfaces)
15A, 16A: central portion 20, SL: sheet laminate S: sheet 30: outlet 30A, 30B: end 31: splitting score line (first splitting score line)
32, 33 Cleavage cut line (second cleavage cut line)
32A, 33A Part 32B, 33B Part 32C, 33C End M Perforation C Cut T Tie D1, D2 Length E1, E2, E3, E4 Spacing OP Opening (take-out port)
40, 50 Seal section (end seal)
60 Seal part (bottom seal)
90 Instrument 91 Needle 91A Tip 92 Base 92A Receiving groove L1, L2, L3 Length W1, W2 Width H1, H2 Height R1, R2 Area AD1, AD2 Direction along the height direction of the gable surface

Claims (9)

A packaging bag having a top surface and a pair of side surfaces opposed to each other in a longitudinal direction, the packaging bag containing a plurality of stacked sheets;
an outlet formed on the top surface through which the sheet is taken out;
A sheet packaging body having a seal portion formed at a center portion in a height direction of each of the side surfaces and extending in a width direction,
The packaging bag is
A paper layer including a paper component;
A resin layer containing a thermoplastic resin provided on at least one surface of the paper layer,
The ratio of the paper component in the packaging bag is 50% or more,
The outlet is
A first tearing score line formed between a pair of longitudinal edges of the top surface;
a second tear score line formed between the edge and the seal portion and continuous with the first tear score line;
The second tearing score line is bent ,
A portion of the second split score line on the first split score line side extends along the height direction,
Sheet packaging. The second tear score line is spaced from the seal portion.
The sheet packaging body according to claim 1 . The second tearing score line is folded back toward the first tearing score line.
The sheet packaging body according to claim 1 or 2 . The basis weight of the paper layer is 10 g/m ² or more and 40 g/m ² or less;
The sheet packaging body according to any one of claims 1 to 3 . The paper layer is formed of kraft paper or rayon paper.
The sheet packaging body according to any one of claims 1 to 4 . The thickness of the resin layer is 5 μm or more and 40 μm or less.
The sheet packaging body according to any one of claims 1 to 5 . The thermoplastic resin is low density polyethylene.
The sheet packaging body according to any one of claims 1 to 6 . The packaging bag is a pillow packaging bag.
The sheet packaging body according to any one of claims 1 to 7 . The seal portion is heat-sealed with the resin layer disposed inside the packaging bag.
The sheet packaging body according to claim 8 .

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