JP7597306B2 - Sheet packaging - Google Patents

Description

The present invention relates to a sheet packaging body.

Sanitary thin papers such as tissue paper are mainly packed in cartons (cardboard boxes). However, carton-type sanitary thin papers have problems such as bulkiness during transportation and storage, disposal after use, environmental burden, and cost. Meanwhile , in recent years, there is an increasing demand for sheet packages in which sheets of sanitary thin papers or the like are packed in flexible film packaging bags. For example, Patent Document 1 discloses a film package in which an opening (perforation) for removing sanitary paper is formed in a flexible film packaging bag in which sanitary paper is packed.

JP 2016-188092 A

However, in conventional sheet packaging, the removal opening formed by a slit such as a perforation is narrow, making it difficult to open when removing the tissue paper (sheet) from the packaging bag. Also, the removal opening formed by a slit in the film packaging bag may lose its sheet-holding power during use, causing the sheet to fall into the packaging bag. Furthermore, because the film packaging bag is lighter than a carton, if there are only a few sheets remaining during use, the entire film packaging bag may lift up when removing the sheets. Thus, conventional sheet packaging has problems with the ease of removing the sheets.

The objective of the present invention is to provide a sheet packaging body that allows for excellent sheet removal.

The first aspect of the present invention is a sheet packaging body having a plurality of stacked sheets, a packaging bag containing the sheets, a first slit formed on the upper surface of the packaging bag and extending in a first direction, and a second slit formed on the upper surface and extending in a second direction parallel to the first direction.

In this specification, a second direction parallel to a first direction means that the first direction and the second direction do not intersect (do not cross). In addition, in this case, parallel is not limited to the case where the second direction is horizontal to the first direction, but also includes the case where the second direction is inclined to the first direction. Note that, since the first direction and the second direction are parallel, the first slit extending in the first direction and the second slit extending in the second direction are arranged at a distance from each other (without crossing).

In the first aspect, a second slit extending in a second direction parallel to the first direction is formed on the top surface of the packaging bag containing the sheet, in comparison with a first slit extending in a first direction. In this configuration, the first slit is opened in the first direction on the top surface of the packaging bag, and the second slit is opened in the second direction parallel to the first direction.

The first slit opened in the first direction forms an outlet for the sheet, and the second slit opened in the second direction forms a buffer for the outlet formed by the first slit. As a result, in the first aspect, even if stress is applied to the opened first slit (outlet) and its surroundings, the stress can be released (or dispersed) to the second slit (buffer).

In this configuration, in the first aspect, the stress applied to the first slit (removal opening) when the opened first slit is opened with a fingertip can be released (or dispersed) to the second slit (buffer section). This makes it easier to open the opened first slit with a fingertip in the first aspect, and makes it easier to remove sheets from within the packaging bag (such as removing the first sheet contained in the packaging bag).

In the first aspect, a second slit (buffer section) is present that extends in a second direction parallel to the first direction relative to the first slit (dispensing opening). This allows the periphery of the first slit to bend (or the first slit to deform in response to the weight of the sheet) held in the first slit (dispensing opening) during use. Therefore, according to the first aspect, the sheet holding force is maintained, and the sheet can be prevented from falling into the packaging bag during use (hereinafter referred to as sheet falling).

Furthermore, in the first aspect, the frictional force (or resistance force) acting on the first slit when removing (or pulling out) the sheet from the first slit (removal opening) during use can be released (or dispersed) to the second slit (buffer section). As a result, in the first aspect, even if the number of remaining sheets decreases during use (i.e., the weight of the sheet packaging body becomes lighter), it is possible to prevent the entire film packaging bag from lifting up when removing the sheet (hereinafter referred to as lifting of the packaging bag).

A second aspect of the present invention is a sheet packaging body in which the length of the second slit is shorter than the length of the first slit. In the second aspect, by making the length of the second slit shorter than the length of the first slit, it is possible to reliably configure the first slit as a sheet removal opening while reliably configuring the second slit as a buffer section for releasing (or dissipating) stress applied to the first slit (removal opening) and its surroundings.

A third aspect of the present invention is a sheet packaging body in which the second slit is formed in the center of the upper surface. In this specification, the center of the upper surface where the second slit is formed refers to the periphery of a portion of the upper surface of the packaging bag that is approximately in the center of the first slit and occupies about one-third of the entire first slit.

The central portion of the top surface where such a second slit is formed is the portion of the top surface of the packaging bag where the stress acting on the first slit is concentrated. In the third aspect, by providing a second slit in such a central portion of the top surface, the stress acting on the opened first slit (access opening) and its surroundings can be efficiently released (or dispersed) to the second slit (buffer section).

A fourth aspect of the present invention is a sheet packaging body in which the second slit has a plurality of first partial slits extending in the second direction, and the first partial slits are arranged in a third direction intersecting the first direction.

In this specification, a third direction intersecting with a first direction means that the first direction and the third direction intersect at a certain point. In addition, the intersection in this case is not limited to the first direction and the third direction intersecting perpendicularly (orthogonally), but also includes the first direction and the third direction intersecting at a diagonal.

In the fourth aspect, the second slit is composed of a plurality of first partial slits extending in the second direction, and each of the first partial slits is arranged in a line in a third direction intersecting the first direction. With this configuration, in the fourth aspect, on the top surface of the packaging bag, each of the first partial slits (multiple buffer sections) of the second slit is opened in a line in the third direction intersecting the first direction relative to the first slit (dispensing opening) opened in the first direction.

In this way, in the fourth aspect, the stress acting on the opened first slit (outlet) and its surroundings can be released (or dispersed) to each of the first partial slits (multiple buffer sections) of the second slits aligned in the third direction. In addition, the first slit (outlet) can be reliably deflected against the weight of the sheet held in the first slit (outlet) during use.

In this way, in the fourth aspect, the opened first slit (removal opening) becomes even easier to open with the fingertips, making it even easier to remove the sheet from the packaging bag. Also, in the fourth aspect, the sheet retention force of the first slit (removal opening) during use is further maintained, making it possible to further prevent the sheet from falling during use. Also, in the fourth aspect, even if there are only a few sheets remaining during use, it is possible to further prevent the packaging bag from lifting up when removing the sheet.

A fifth aspect of the present invention is a sheet packaging body in which the length of the first partial slits becomes shorter as they move away from the first slit in the third direction. In this specification, "shorter as they move away from the first slit in the third direction" means that the length of each of the first partial slits constituting the second slit gradually becomes shorter as the distance from the first slit in the third direction becomes longer.

In this way, in the fifth aspect, the length of each of the first partial slits constituting the second slit becomes shorter the further away from the first slit in the third direction, so that the stress acting on the opened first slit (access opening) and its surroundings can be efficiently released (or dispersed) in the third direction where each of the first partial slits (multiple buffer sections) of the second slit are aligned.

As a result, in the fifth aspect, the opened first slit (removal opening) becomes even easier to open with the fingertips, making it even easier to remove the sheet from the packaging bag. In addition, even if there are only a few sheets remaining during use, it is possible to further prevent the packaging bag from lifting up when removing the sheet.

In addition, in the fifth aspect, the length of each of the first partial slits constituting the second slit is shortened the farther away from the first slit in the third direction, so that the first slit (outlet) can be prevented from bending too much due to the weight of the sheet held in the first slit (outlet) during use. As a result, in the fifth aspect, the sheet holding force by the first slit (outlet) during use is appropriately maintained, and it is possible to reliably prevent the sheet from falling during use.

A sixth aspect of the present invention is a sheet packaging body having a third slit formed on the upper surface and extending in a fourth direction parallel to the first direction, the third slit being arranged on either side of the second slit and the first slit.

In this specification, the fourth direction parallel to the first direction means that the first direction and the fourth direction do not intersect (do not cross). In this case, parallel does not necessarily mean that the fourth direction is horizontal to the first direction, but also includes the case where the fourth direction is inclined to the first direction. The fourth direction may overlap in the same direction as the second direction in which the second slits described above extend. Since the first direction and the fourth direction are parallel, the first slits extending in the first direction and the third slits extending in the fourth direction are arranged apart from each other (without crossing).

Also, the third slit being arranged between the second slit and the first slit means that the third slit is arranged to face the second slit, with the first slit interposed between the second slit and the third slit.

In the sixth aspect, such a third slit extending in the fourth direction is arranged on either side of the second slit and the first slit, so that the second slit and the third slit (two buffer sections) can be arranged on either side of the first slit (dispensing opening). As a result, in the sixth aspect, the stress applied to the opened first slit (dispensing opening) and its surroundings can be released (or dispersed) to both sides of the first slit. Also, the first slit can bend in a balanced manner against the weight of the sheet held in the first slit during use.

In the sixth aspect, this configuration makes it easier to open the opened first slit (removal opening) with the fingertips, making it easier to remove the sheet from the packaging bag. In addition, the sheet retention force of the first slit (removal opening) during use is further maintained, further preventing the sheet from falling during use. In addition, even if there are only a few sheets remaining during use, the packaging bag can be further prevented from lifting up when removing the sheet.

A seventh aspect of the present invention is a sheet packaging body in which the length of the third slit is shorter than the length of the first slit. In the seventh aspect, by making the length of the third slit shorter than the length of the first slit, it is possible to reliably configure the first slit as a sheet removal opening while reliably configuring the third slit as a buffer section for releasing (or dispersing) stress applied to the first slit (removal opening) and its surroundings.

The eighth aspect of the present invention is a sheet packaging body in which the third slit is formed in the center of the upper surface. In the eighth aspect, by providing the second slit and the third slit in such a center of the upper surface (the portion where the stress on the first slit is concentrated as described above), the stress on the first slit (dispensing opening) and its surroundings can be efficiently released (or dispersed) to the second slit and the third slit (two buffer portions), respectively.

A ninth aspect of the present invention is a sheet packaging body in which the third slit has a plurality of second partial slits extending in the fourth direction, and the second partial slits are arranged in a fifth direction that intersects with the first direction.

In this specification, the fifth direction intersecting with the first direction means that the first direction and the fifth direction intersect at a certain point. In addition, the intersection in this case is not limited to the first direction and the fifth direction intersecting perpendicularly (orthogonally), but also includes the first direction and the fifth direction intersecting at a diagonal. In addition, the fifth direction may overlap with the third direction in which the multiple first partial slits constituting the second slit described above are arranged.

In the ninth aspect, the third slit is composed of a plurality of second partial slits extending in the fourth direction, and each second partial slit is arranged in a line in a fifth direction intersecting the first direction. With this configuration, in the ninth aspect, on the top surface of the packaging bag, each second partial slit (multiple buffer sections) of the third slit is opened in a line in the fifth direction intersecting the first direction relative to the first slit (dispensing opening) that is opened in the first direction.

As a result, in the ninth aspect, the stress acting on the opened first slit (outlet) and its surroundings can be released (or dispersed) to each of the second partial slits (multiple buffer sections) of the third slits aligned in the fifth direction. In addition, the first slit (outlet) can be reliably deflected against the weight of the sheet held in the first slit (outlet) during use.

As a result, in the ninth aspect, the opened first slit (removal opening) becomes even easier to open with the fingertips, making it even easier to remove the sheet from inside the packaging bag. Also, in the ninth aspect, the sheet retention force of the first slit (removal opening) during use is further maintained, making it possible to further prevent the sheet from falling during use. Also, in the ninth aspect, even if there are only a few sheets remaining during use, it is possible to further prevent the packaging bag from lifting up when removing the sheet.

A tenth aspect of the present invention is a sheet packaging body in which the length of the second partial slits becomes shorter as they move away from the first slit in the fifth direction. In this specification, "shorter as they move away from the first slit in the fifth direction" means that the length of each second partial slit constituting the third slit gradually becomes shorter as the distance from the first slit in the fifth direction increases.

In this way, in the tenth aspect, the length of each of the second partial slits constituting the third slit becomes shorter the further away from the first slit in the fifth direction, so that the stress acting on the opened first slit (access opening) and its surroundings can be efficiently released (or dispersed) in the fifth direction where each of the second partial slits (multiple buffer sections) of the third slit are aligned.

As a result, in the tenth aspect, the opened first slit (removal opening) becomes even easier to open with the fingertips, making it even easier to remove the sheet from the packaging bag. In addition, even if there are only a few sheets remaining during use, it is possible to further prevent the packaging bag from lifting up when removing the sheet.

In addition, in the tenth aspect, the length of each of the first partial slits constituting the third slit is shortened the farther away from the first slit in the fifth direction, so that the first slit (outlet) can be prevented from bending too much due to the weight of the sheet held in the first slit (outlet) during use. As a result, in the tenth aspect, the sheet holding force of the first slit (outlet) during use is appropriately maintained, and it is possible to reliably prevent the sheet from falling during use.

According to one aspect of the present invention, it is possible to provide a sheet packaging body that is excellent in sheet removal properties.

1 is a diagram showing a sheet wrapping body according to an embodiment (first embodiment) of the present invention. FIG. 1 is a diagram showing a sheet wrapping body according to a first embodiment as viewed from above in a height direction. 3A to 3C are diagrams illustrating a state in which the sheet wrapping body according to the first embodiment is used. 13 is a diagram showing a sheet wrapping body according to a second embodiment as viewed from above in a height direction. FIG. 13 is a diagram showing the sheet wrapping body according to the third embodiment as viewed from above in the height direction. FIG. 13 is a diagram showing a sheet wrapping body according to a fourth embodiment as viewed from above in a height direction. FIG. FIG. 1 is a diagram showing a conventional sheet packaging body. 8 is a diagram showing a state in which the sheet wrapping body shown in FIG. 7 is used. FIG.

The embodiment of the present invention will be described in detail with reference to the drawings. In the following description, parts common to each figure may be given the same reference numerals and explanations may be omitted. Also, to facilitate understanding, the scale of each component in each drawing may differ from the actual scale.

Figure 1 is a diagram showing a sheet wrapping body according to a first embodiment of the present invention. Figure 2 is a diagram showing the sheet wrapping body according to the first embodiment as viewed from above in the height direction. Figure 3 is a diagram showing the sheet wrapping body according to the first embodiment in use. In the sheet wrapping body 100 shown in Figures 1 to 3, the longitudinal direction (left-right direction) is the X direction, the depth direction (front-back direction) is the Y direction, and the height direction (up-down direction) is the Z direction. The sheet wrapping body 100 according to this embodiment will be described below.

As shown in Figs. 1 to 3, the sheet packaging body 100 according to the first embodiment has a sheet ST, a packaging bag 10, a first slit 20, and a second slit 50. The sheet packaging body 100 is an example of a sheet packaging body according to the present invention. The sheet ST, the packaging bag 10, the first slit 20 (take-out opening OP), and the second slit 50 are examples of the sheet, the packaging bag, the first slit, and the second slit that respectively constitute the sheet packaging body according to the present invention.

The sheet ST is contained in the packaging bag 10 as a stack SL in which a plurality of sheets ST are stacked. The stack SL of the sheets ST is contained in the packaging bag 10 such that the stacking direction (SD direction) of the sheets ST is the height direction (Z direction). The sheet stack SL is configured so that the sheets ST can be pulled out one by one through a first slit 20 (take-out opening OP) formed in the packaging bag 10.

The stack SL of sheets ST is not limited to a simple stack of multiple sheets ST, but may be stacked in a folded state, or may be stacked in a staggered manner with each sheet ST folded (a so-called pop-up type stack SL of sheets). From the viewpoint of pulling out the sheets ST one by one, it is preferable that the stack SL of sheets ST is a stack SL that can be pulled out in a pop-up type.

The dimensions of the stack SL of the sheets ST can be about 80 to 250 mm in the longitudinal direction (X direction) of the sheet wrapping body 100, about 50 to 130 mm in the depth direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet wrapping body 100 in a top view, and about 10 to 90 mm in the height direction (Z direction). Such a stack SL of sheets ST can be manufactured, for example, by a rotary type or multi-stand type interfolder.

The use of the sheet ST is not particularly limited, and it can be applied to sanitary thin papers such as tissue paper, toilet paper, kitchen paper, paper towels, etc. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissue, etc.). In addition, the use of the sanitary thin paper that constitutes the sheet ST is not particularly limited, and it can be applied to industrial, household, and portable uses. The sheet packaging body 100 of this embodiment is preferably used for household tissue paper among these.

The number of plies of the sheet ST is not particularly limited, but may be one or more, preferably one, and more preferably two (two plies). The shape of the sheet ST is not particularly limited, but it is preferable that the outline shape of the two-ply sheet when folded is rectangular, for example.

The material of the sheet ST is not particularly limited, but may be, for example, a sheet of paper, nonwoven fabric, cloth, or the like, and is preferably a paper sheet. When the sheet ST 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 of the sheet ST (paper sheet) may be any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) to hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp). In particular, a pulp composition having a higher ratio of softwood pulp to hardwood pulp is preferred. The ratio of softwood pulp to hardwood pulp is preferably 50:50 to 80:20. The pulp contained in the pulp composition of the sheet ST (paper sheet) may be recycled paper pulp.

The basis weight of the sheet ST is not particularly limited, but is preferably 10 to 80 g/m ² for paper and 20 to 100 g/m ² for nonwoven fabric, depending on the number of plies. The basis weight is measured in accordance with the provisions of JIS P 8124.

The thickness of the sheet ST (paper sheet) is not particularly limited, but may be, for example, the paper thickness measured under the environment of JIS P 8111 (1998). For example, the thickness of the paper sheet constituting the sheet ST is preferably 50 to 500 μm per ply, and more preferably 60 to 330 μm.

The paper thickness is measured by thoroughly conditioning the test piece under the conditions of JIS P 8111 (1998), and then measuring the thickness of one ply under the same conditions using a dial thickness gauge (thickness measuring device) "PEACOCK G type" (manufactured by Ozaki Manufacturing Co., Ltd.). Specifically, after making sure that there is no dirt or dust between the plunger and the measurement table, the plunger is lowered onto the measurement table, and the dial thickness gauge's scale is moved to set the zero point. Next, the plunger is raised and the sample is placed on the test table, and the gauge is read when the plunger is slowly lowered. At this time, the plunger is only placed on the test table. The plunger terminal is made of metal, and the circular flat surface with a diameter of 10 mm is placed perpendicularly to the paper plane, and the load during paper thickness measurement is approximately 70 gf. The paper thickness is the average value obtained by performing 10 measurements.

The paper sheets constituting the sheet ST may also be embossed. Such embossing may be performed by known contact embossing or edge embossing methods, in which an embossing not shown is pressed against both ends of a paper sheet and multiple paper sheets are laminated together; known pin embossing methods, in which a pin not shown is inserted into a paper sheet to form a pin embossing on one side of the paper sheet; or known embossing methods, in which a water-soluble adhesive (such as starch) is heated and melted to bond laminated paper sheets (not shown) together to form an embossing.

The packaging bag 10 constituting the sheet packaging body 100 is formed of a flexible film. The packaging bag 10 is manufactured by caramel packaging. Specifically, both ends of a cylindrical flexible film are formed by folding and gluing (sealing) sealing parts 30, 40. The packaging form of the sheet packaging body 100 is not limited to this caramel packaging, and both ends or either one of the ends of the cylindrical flexible film may be sealed in a gusset shape by heat sealing (sealed by so-called pillow packaging).

The material of the flexible film forming the packaging bag 10 is not particularly limited, and resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. can be used.

Among these flexible films, polyethylene, polypropylene, polyethylene terephthalate, and the like are preferred from the viewpoints of flexibility, ease of handling, high sealability, and low cost. Polyethylene is also preferred from the viewpoints of odorlessness, excellent water resistance and chemical resistance, and low cost mass production. As polyethylene, high density polyethylene, low density polyethylene, and the like can be used. Polypropylene is also preferred from the viewpoints of robustness, ease of molding, good color development when printed, and ability to impart gloss.

The form of the flexible film forming the packaging bag 10 is not particularly limited, and may be a single-layer film formed of a single layer of the above-mentioned resin, a laminate film in which the above-mentioned resin is laminated, or a mixed film formed of a mixture of two or more of the above-mentioned resins.

The thickness of the flexible film forming the packaging bag 10 is not particularly limited, and is preferably 20 to 100 μm, and more preferably 25 to 70 μm. By making the thickness of the flexible film 20 μm or more, it is possible to ensure sufficient strength for the packaging bag 10 in which the sheet ST is contained. Furthermore, by making the thickness of the flexible film 100 μm or less, it is possible to ensure the flexibility and light weight of the packaging bag 10 and to reduce costs.

In this embodiment, the packaging bag 10 has an upper surface 11, a lower surface 12, a front surface 13, a rear surface 14, and side surfaces 15 and 16, and contains a stack SL of sheets ST. In the sheet packaging body 100, as shown in Figures 1 and 3, the upper surface 11 and the lower surface 12 face each other in the vertical direction (Z direction), the front surface 13 and the rear surface 14 face each other in the front-rear direction (Y direction), and the side surfaces 15 and 16 face each other in the left-right direction (X direction).

In the packaging bag 10, the top surface 11 is provided at the top in the vertical direction (Z direction), and the bottom surface 12 is provided at the bottom in the vertical direction (Z direction). The front surface 13 is provided at the front in the front-to-back direction (Y direction), and the back surface 14 is provided at the rear in the front-to-back direction (Y direction). Furthermore, the side surface 15 is provided at the left in the left-to-right direction (Y direction), and the side surface 16 is provided at the right in the left-to-right direction (Y direction). The side surfaces 15 and 16 are continuous with the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14 (see Figures 1 and 3).

The first slit 20 is formed on the upper surface 11 of the packaging bag 10. The first slit 20 is disposed in the center 11a of the upper surface 11 of the packaging bag 10 in the longitudinal direction (X direction) of the sheet packaging body 100, and extends in a first direction. In this embodiment, the first direction in which the first slit 20 extends corresponds to the longitudinal direction (X direction) of the sheet packaging body 100 (see Figures 1 and 2).

The shape of the first slit 20 is not particularly limited, and can be formed, for example, by forming a perforation on the top surface 11 of the packaging bag 10 as shown in Figures 1 and 2. In the example shown in Figures 1 and 2, the top surface 11 of the packaging bag 10 is opened in a first direction (X direction) by tearing the first slit 20 formed by the perforation, and the torn (opened) first slit 20 forms the removal opening OP for the sheet ST.

The dimension (length L1) of the first slit 20 (perforation) can be determined arbitrarily according to the dimension of the sheet ST to be removed. For example, the difference in length of the removal opening OP relative to the width dimension of the sheet ST in the left-right direction (X direction) is preferably -100 to 0 mm, more preferably -80 to 0 mm, and even more preferably -70 to -10 mm.

In this embodiment, a second slit 50 is further formed on the top surface 11 of the packaging bag 10. The second slit 50 is formed in the central portion 11b of the top surface 11 and extends in a second direction parallel to the first direction (X direction). Here, the central portion 11b of the top surface 11 refers to the periphery of a portion of the top surface 11 of the packaging bag 10 that is approximately the center 20a of the first slit 20 and accounts for approximately one-third of the entire first slit 20.

The second direction (X direction) parallel to the first direction (X direction) means that the first direction (X direction) and the second direction (X direction) do not intersect (do not cross). In this case, parallel does not necessarily mean that the second direction (X direction) is horizontal to the first direction (X direction), but also means that the second direction (X direction) is inclined to the first direction (X direction). In this embodiment, the second direction in which the second slit 50 extends is approximately horizontal to the first direction (X direction) and corresponds to the longitudinal direction (X direction) of the sheet packaging body 100 (see Figures 1 and 2).

The shape of the second slit 50 is not particularly limited, and can be formed, for example, by forming a perforation on the top surface 11 of the packaging bag 10 as shown in Figures 1 and 2. In the example shown in Figures 1 and 2, the top surface 11 of the packaging bag 10 is opened in the second direction (X direction) by tearing the second slit 50 formed by the perforation, and the torn (opened) second slit 50 forms a buffer section BS for the take-out opening OP of the sheet ST.

The dimensions of the second slit 50 (perforation) are not particularly limited, but as shown in FIG. 2, it is preferable that the length L2 of the second slit 50 is shorter than the length L1 of the first slit 20. Specifically, the ratio of the length L2 of the second slit 50 to the length L1 of the first slit 20 is preferably 3 to 30%, more preferably 4 to 25%, and even more preferably 5 to 22%.

The distance D1 from the first slit 20 to the second slit 50 is not particularly limited, but the ratio of the distance D1 to the length L2 of the second slit 50 is preferably 50 to 80%, more preferably 40 to 60%, and even more preferably 30 to 50%.

In the first embodiment, as described above, a first slit 20 extending in a first direction (X direction) is formed on the top surface 11 of the packaging bag 10 containing the sheet ST (sheet stack SL), and a second slit 50 extending in a second direction (X direction) parallel to the first direction (X direction) is formed (see Figures 1 and 2). As a result, in this embodiment, even if stress is applied to the opened first slit 20 (access opening OP) and its surroundings 11c, the stress can be released (or dispersed) to the second slit 50 (buffer section BS) (see Figure 3).

In this configuration, in the first embodiment, when the opened first slit 20 is opened with a fingertip, the stress applied to the first slit 20 (opening OP) can be released (or dispersed) to the second slit 50 (buffer section BS). Therefore, according to this embodiment, the opened first slit 20 can be easily opened with a fingertip, and the sheet ST can be easily removed from the packaging bag 10 (e.g., the first sheet of the sheet ST contained in the packaging bag 10 can be easily removed).

In addition, in the first embodiment, there is a second slit 50 (buffer section BS) that extends in a second direction (X direction) parallel to the first direction (X direction) relative to the first slit 20 (outlet OP). As a result, in this embodiment, the periphery 11c of the first slit 20 can bend (or the first slit 20 can deform in response to the weight of the sheet ST) held in the first slit 20 (outlet OP) during use. Therefore, according to this embodiment, the holding force of the sheet ST is maintained, and it is possible to prevent the sheet ST from falling into the packaging bag 10 during use (hereinafter referred to as the falling of the sheet ST).

Furthermore, in the first embodiment, the frictional force (or resistance force) acting on the first slit 20 when the sheet ST is taken out (or pulled out) from the first slit 20 (take-out opening OP) during use can be released (or dispersed) to the second slit 50 (buffer section BS). Therefore, according to this embodiment, even if the remaining sheet ST becomes small during use (i.e., even if the weight of the sheet packaging body 100 becomes lighter), it is possible to prevent the entire packaging bag 10 from lifting up when the sheet ST is taken out (hereinafter referred to as lifting of the packaging bag 10).

In addition, in this embodiment, by making the length L2 of the second slit 50 shorter than the length L1 of the first slit 20 as described above, the first slit 20 can be reliably configured as an outlet OP for the sheet ST. And, the second slit 50 can be reliably configured as a buffer section BS for releasing (or dissipating) the stress applied to the first slit 20 (outlet OP) and its surroundings 11c.

In this embodiment, the central portion 11b of the top surface 11 of the packaging bag 10 where the second slit 50 is formed as described above is the portion of the top surface 11 of the packaging bag 10 where the stress applied to the first slit 20 is concentrated. Therefore, by providing the second slit 50 in such central portion 11b of the top surface 11, the stress applied to the opened first slit 20 (access opening OP) and its surroundings 11c can be efficiently released (or dispersed) to the second slit 50 (buffer portion BS).

Fig. 4 is a view of the sheet packaging body according to the second embodiment as viewed from above in the height direction. As shown in Fig. 4, the sheet packaging body 100 according to the second embodiment further has a third slit 60. The third slit 60 is formed in the center portion 11b of the upper surface 11 of the packaging bag 10 and extends in a fourth direction (X direction) parallel to the first direction (X direction). The third slit 60 is an example of a third slit constituting the sheet packaging body according to the present invention.

Here, the fourth direction (X direction) parallel to the first direction (X direction) means that the first direction (X direction) and the fourth direction (X direction) do not intersect (do not cross). In this case, parallel does not necessarily mean that the fourth direction (X direction) is horizontal to the first direction (X direction), but also includes the case where the fourth direction (X direction) is inclined to the first direction (X direction). Furthermore, the fourth direction (X direction) may overlap with the second direction (X direction) in which the second slit 50 described above extends. In this embodiment, the fourth direction in which the third slit 60 extends is approximately horizontal to the first direction (X direction) and corresponds to the longitudinal direction (X direction) of the sheet packaging body 100 (see FIG. 4).

The third slit 60 is formed on the upper surface 11 of the packaging bag 10 so as to be aligned with the second slit 50 and the first slit 20 therebetween, as shown in FIG. 4. The third slit 60 is aligned with the second slit 50 and the first slit 20 therebetween, meaning that the third slit 60 is arranged to face the second slit 50 with the first slit 20 interposed between the second slit 50 and the third slit 60 (see FIG. 4).

The shape of the third slit 60 is not particularly limited, and can be formed, for example, by forming a perforation on the top surface 11 of the packaging bag 10 as shown in FIG. 4. In the example shown in FIG. 4, the top surface 11 of the packaging bag 10 is opened in the fourth direction (X direction) by tearing the third slit 60 formed by the perforation, and the torn (opened) third slit 60, together with the second slit 50, forms a buffer section BS for the outlet OP of the sheet ST.

The dimensions of the third slit 60 (perforation) are not particularly limited, but as shown in FIG. 4, it is preferable that the length L3 of the third slit 60 is shorter than the length L1 of the first slit 20. Specifically, the ratio of the length L3 of the third slit 60 to the length L1 of the first slit 20 is preferably 3 to 30%, more preferably 4 to 25%, and even more preferably 5 to 22%.

The distance D2 from the first slit 20 to the third slit 60 is not particularly limited, but the ratio of the distance D2 to the length L2 of the second slit 50 is preferably 50 to 80%, more preferably 40 to 60%, and even more preferably 30 to 50%.

In the second embodiment, the third slit 60 extending in the fourth direction (X direction) is arranged on either side of the second slit 50 and the first slit 20, so that the second slit 50 and the third slit 60 (two buffer sections BS) can be arranged on either side of the first slit 20 (outlet OP). As a result, in the second embodiment, the stress applied to the opened first slit 20 (outlet OP) and its surroundings 11c can be released (or dispersed) to both sides of the first slit 20. Also, the first slit 20 can bend in a balanced manner against the weight of the sheet ST held in the first slit 20 during use.

In the second embodiment, this configuration makes it easier to open the opened first slit 20 (removal opening OP) with the fingertips, making it easier to remove the sheet ST from inside the packaging bag 10. In addition, the holding force of the sheet ST by the first slit 20 (removal opening OP) during use is further maintained, making it possible to further prevent the sheet ST from falling during use. In addition, even if there are only a few sheets ST remaining during use, it is possible to further prevent the packaging bag 10 from lifting up when removing the sheet ST.

In addition, in the second embodiment, by making the length L3 of the third slit 60 shorter than the length L1 of the first slit 20 as described above, the first slit 20 can be reliably configured as an outlet OP for the sheet ST. In addition, the third slit 60 can be reliably configured together with the second slit 50 as a buffer section BS for releasing (or dissipating) the stress applied to the first slit 20 (outlet OP) and its surroundings 11c.

In the second embodiment, the central portion 11b of the top surface 11 of the packaging bag 10 where the third slit 60 is formed as described above is the portion of the top surface 11 of the packaging bag 10 where the stress applied to the first slit 20 is concentrated as described above. Therefore, by forming the third slit 60 in such central portion 11b of the top surface 11, the stress applied to the first slit 20 (the outlet OP) and its surroundings 11c can be efficiently released (or dispersed) to the second slit 50 and the third slit 60 (the two buffer portions BS).

Figure 5 is a view of the sheet wrapping body according to the third embodiment as viewed from above in the height direction. In the sheet wrapping body 100 according to the third embodiment, as shown in Figure 5, the second slit 50 has a plurality of first partial slits 51, 52, 53 extending in the second direction (X direction). The first partial slits 51, 52, 53 are arranged side by side in a third direction (Y direction) intersecting the first direction (X direction). Note that the number of the multiple first partial slits constituting the second slit 50 is not limited to the three first partial slits 51, 52, 53 shown in Figure 5, and may be two or more first partial slits.

Here, the third direction (Y direction) intersecting with the first direction (X direction) means that the first direction (X direction) and the third direction (Y direction) intersect at a certain point. In addition, the intersection in this case is not limited to the case where the first direction (X direction) and the third direction (Y direction) intersect perpendicularly (orthogonally), but also includes the case where the first direction (X direction) and the third direction (Y direction) intersect at a diagonal. In this embodiment, the third direction (Y direction) in which the first partial slits 51, 52, and 53 are aligned is perpendicular to the first direction (X direction) and corresponds to the depth direction (Y direction) of the sheet packaging body 100 (see FIG. 5).

In this configuration, in the third embodiment, the second slit 50 has first partial slits 51, 52, 53 arranged in the order of proximity to the first slit 20 in the third direction (Y direction) on the front surface 13 side of the top surface 11 of the packaging bag 10 (see FIG. 5). As a result, in the third embodiment, the first partial slits 51, 52, 53 (multiple buffer sections BS) of the second slit 50 are opened in a line in the third direction (Y direction) that intersects with the first direction (X direction) relative to the first slit 20 (take-out opening OP) that has been opened in the first direction (X direction) on the top surface 11 of the packaging bag 10.

In the third embodiment, as shown in FIG. 5, the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53 constituting the second slit 50 are all substantially the same length and are shorter than the length L1 of the first slit 20. The ratio of the length L2 of the second slit 50 (the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53) to the length L1 of the first slit 20 is preferably 3 to 25%, more preferably 4 to 20%, and even more preferably 5 to 18%, respectively.

Further, the distance D1 from the first slit 20 to the first partial slit 51, the distance D1 between the first partial slits 51 and 52, and the distance D1 between the first partial slits 52 and 53 are substantially the same. Although the distance D1 is not particularly limited, the ratio of the distance D1 to the length L2 of the second slit 50 is preferably 50 to 80%, more preferably 40 to 60%, and further preferably 30 to 50%.

In addition, in the sheet packaging body 100 according to the third embodiment, as shown in FIG. 5, the third slit 60 has a plurality of second partial slits 61, 62, 63 extending in the fourth direction (X direction). The second partial slits 61, 62, 63 are arranged side by side in the fifth direction (Y direction) intersecting with the first direction (X direction). Note that the number of the multiple second partial slits constituting the third slit 60 is not limited to the three second partial slits 61, 62, 63 shown in FIG. 5, and may be two or more second partial slits.

Here, the fifth direction (Y direction) intersecting with the first direction (X direction) means that the first direction (X direction) and the fifth direction (Y direction) intersect at a certain point. In addition, the intersection in this case is not limited to the case where the first direction (X direction) and the fifth direction (Y direction) intersect perpendicularly (orthogonally), but also includes the case where the first direction (X direction) and the fifth direction (Y direction) intersect at a diagonal. In addition, the fifth direction (Y direction) may overlap with the third direction (Y direction) in which the multiple first partial slits 51, 52, 53 constituting the second slit 50 described above are arranged.

In this embodiment, the fifth direction (Y direction) in which the second partial slits 61, 62, and 63 are aligned is perpendicular to the first direction (X direction) and corresponds to the depth direction (Y direction) of the sheet packaging body 100 (see FIG. 5). The fifth direction (Y direction) also corresponds to the third direction (Y direction) in which the first partial slits 51, 52, and 53 are aligned.

In this configuration, in the third embodiment, the third slit 60 has second partial slits 61, 62, 63 arranged in the order of proximity from the first slit 20 in the fifth direction (Y direction) on the back surface 14 side of the upper surface 11 of the packaging bag 10 (see FIG. 5). As a result, in the third embodiment, the second partial slits 61, 62, 63 (multiple buffer sections BS) of the third slit 60 are opened in a line in the fifth direction (Y direction) that intersects with the first direction (X direction) relative to the first slit 20 (take-out opening OP) that has been opened in the first direction (X direction) on the upper surface 11 of the packaging bag 10.

In the third embodiment, as shown in FIG. 5, the lengths L31, L32, and L33 of the second partial slits 61, 62, and 63 constituting the third slit 60 are all substantially the same length and are shorter than the length L1 of the first slit 20. The ratio of the length L3 of the third slit 60 (the lengths L31, L32, and L33 of the second partial slits 61, 62, and 63) to the length L1 of the first slit 20 is preferably 3 to 25%, more preferably 4 to 20%, and even more preferably 5 to 18%.

Further, the distance D2 from the first slit 20 to the second partial slit 61, the distance D2 between the second partial slits 61 and 62, and the distance D2 between the second partial slits 62 and 63 are substantially the same. Although the distance D2 is not particularly limited, the ratio of the distance D2 to the length L3 of the third slit 60 is preferably 50 to 80%, more preferably 40 to 60%, and further preferably 30 to 50%.

In the third embodiment, the stress acting on the opened first slit 20 (outlet OP) and its surroundings 11c can be released (or dispersed) to each of the first partial slits 51, 52, 53 (multiple buffer sections BS) of the second slit 50 aligned in the third direction (Y direction). In addition, the first slit 20 (outlet OP) can be reliably deflected against the weight of the sheet ST held in the first slit 20 (outlet OP) during use.

As a result, in the third embodiment, the opened first slit 20 (dispensing opening OP) becomes even easier to open with fingertips, making it easier to remove the sheet ST from inside the packaging bag 10. Also, in the third embodiment, the holding force of the sheet ST by the first slit 20 (dispensing opening OP) during use is further maintained, making it possible to better prevent the sheet ST from falling during use. Also, in the third embodiment, even if there are only a few sheets ST remaining during use, it is possible to reliably prevent the packaging bag 10 from lifting up when removing the sheet ST.

In addition, in the third embodiment, the stress acting on the opened first slit 20 (outlet OP) and its surroundings 11c can be released (or dispersed) to each of the second partial slits 61, 62, 63 (multiple buffer sections BS) of the third slit 60 aligned in the fifth direction (Y direction). In addition, the first slit 20 (outlet OP) can bend more reliably against the weight of the sheet ST held in the first slit 20 (outlet OP) during use.

As a result, in the third embodiment, the opened first slit 20 (dispensing opening OP) becomes even easier to open with fingertips, making it even easier to remove the sheet ST from inside the packaging bag 10. Also, in the third embodiment, the holding force of the sheet ST by the first slit 20 (dispensing opening OP) during use is further maintained, making it possible to further prevent the sheet ST from falling during use. Also, in the third embodiment, even if there are only a few sheets ST remaining during use, it is possible to more reliably prevent the packaging bag 10 from lifting up when removing the sheet ST.

Figure 6 is a diagram of the sheet wrapping body according to the fourth embodiment as viewed from above in the height direction. In the sheet wrapping body 100 according to the fourth embodiment, as shown in Figure 6, the first partial slits 51, 52, and 53 constituting the second slit 50 are arranged so that they become shorter as they move away from the first slit 20 in the third direction (Y direction).

Here, the further away from the first slit 20 in the third direction (Y direction), the shorter the length L21, L22, L23 of each of the first partial slits 51, 52, 53 constituting the second slit 50 becomes gradually shorter as the distance from the first slit 20 in the third direction (Y direction) becomes longer.

Specifically, the relationship between the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53 is such that the length L21 of the first partial slit 51 is longer than the length L22 of the first partial slit 52, and the length L23 of the first partial slit 53 is shorter than the length L22 of the first partial slit 52. That is, the relationship between the lengths of the first partial slits 51, 52, and 53 is L21>L22>L23.

The relationship between the lengths of the first partial slits 51, 52, and 53 is not particularly limited as long as the relationship is L21>L22>L23. For example, the ratio of the length L21 of the first partial slit 51 to the length L22 of the first partial slit 52 is preferably 5:1 to 1.3:1, more preferably 4:1 to 1.5:1, and even more preferably 3:1 to 1.5:1. The ratio of the length L22 of the first partial slit 52 to the length L23 of the first partial slit 53 is preferably 5:1 to 1.3:1, more preferably 4:1 to 1.5:1, and even more preferably 3:1 to 1.5:1.

In addition, in the sheet packaging body 100 according to the fourth embodiment, as shown in FIG. 6, the second partial slits 61, 62, and 63 constituting the third slit 60 are arranged so that they become shorter as they move away from the first slit 20 in the fifth direction (Y direction).

Here, the further away from the first slit 20 in the fifth direction (Y direction), the shorter the length is, meaning that the lengths L31, L32, L33 of the second partial slits 61, 62, 63 constituting the third slit 60 become gradually shorter as the distance from the first slit 20 in the fifth direction (Y direction) becomes longer.

Specifically, the relationship between the lengths L31, L32, and L33 of the second partial slits 61, 62, and 63 is such that the length L31 of the second partial slit 61 is longer than the length L32 of the second partial slit 62, and the length L33 of the second partial slit 63 is shorter than the length L32 of the second partial slit 62. That is, the relationship between the lengths of the second partial slits 61, 62, and 63 is L31>L32>L33.

The relationship between the lengths of the second partial slits 61, 62, and 63 is not particularly limited as long as the relationship is L31>L32>L33. For example, the ratio of the length L31 of the second partial slit 61 to the length L32 of the second partial slit 62 is preferably 5:1 to 1.3:1, more preferably 4:1 to 1.5:1, and even more preferably 3:1 to 1.5:1. The ratio of the length L32 of the second partial slit 62 to the length L33 of the second partial slit 63 is preferably 5:1 to 1.3:1, more preferably 4:1 to 1.5:1, and even more preferably 3:1 to 1.5:1.

In the fourth embodiment, as described above, the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53 constituting the second slit 50 become shorter the further away from the first slit 20 in the third direction (Y direction). This allows the stress acting on the opened first slit 20 (outlet OP) and its surroundings 11c to be efficiently released (or dispersed) in the third direction (Y direction) in which the first partial slits 51, 52, and 53 (multiple buffer sections BS) of the second slit 50 are aligned.

With this configuration, in the fourth embodiment, the opened first slit 20 (removal opening OP) becomes even easier to open with the fingertips, making it even easier to remove the sheet ST from inside the packaging bag 10. In addition, even if the remaining sheets ST become few during use, it is possible to further prevent the packaging bag 10 from lifting up when removing the sheet ST.

In addition, in the fourth embodiment, the lengths L21, L22, L23 of the first partial slits 51, 52, 53 constituting the second slit 50 are shortened as they move away from the first slit 20 in the third direction (Y direction), thereby preventing the first slit 20 (outlet OP) from bending too much due to the weight of the sheet ST held in the first slit 20 (outlet OP) during use. As a result, in the fourth embodiment, the holding force of the sheet ST by the first slit 20 (outlet OP) during use is appropriately maintained, and it is possible to reliably prevent the sheet ST from falling during use.

In addition, in the fourth embodiment, as described above, the lengths L31, L32, L33 of the second partial slits 61, 62, 63 constituting the third slit 60 become shorter the further away from the first slit 20 in the fifth direction (Y direction). This allows the stress acting on the opened first slit 20 (outlet OP) and its surroundings 11c to be efficiently released (or dispersed) in the fifth direction (Y direction) in which the second partial slits 61, 62, 63 (multiple buffer sections BS) of the third slit 60 are aligned.

With this configuration, in the fourth embodiment, the opened first slit 20 (removal opening OP) becomes even easier to open with the fingertips, making it even easier to remove the sheet ST from inside the packaging bag 10. In addition, even if the remaining sheets ST become few during use, it is possible to further prevent the packaging bag 10 from lifting up when removing the sheet ST.

In addition, in the fourth embodiment, the lengths L21, L22, L23 of the first partial slits 51, 52, 53 constituting the third slit 60 are shortened as they move away from the first slit 20 in the fifth direction, thereby preventing the first slit 20 (outlet OP) from bending too much due to the weight of the sheet ST held in the first slit 20 (outlet OP) during use. As a result, in the fourth embodiment, the holding force of the sheet ST by the first slit 20 (outlet OP) during use is appropriately maintained, and the sheet ST can be reliably prevented from falling during use.

In each of the sheet packaging bodies 100 according to the first to fourth embodiments, the first slit 20 may have a width in the third direction (Y direction) and/or the fifth direction (Y direction) that is not shown. In this case, the width of the first slit 20 is preferably shorter than the length L2 of the second slit 50. In addition, the width of the first slit 20 is preferably shorter than the length L3 of the third slit 60.

When the width of the first slit 20 in the third direction (Y direction) is shorter than the length L2 of the second slit 50, an outlet OP whose width dimension in the third direction (Y direction) is shorter than the length L2 of the second slit 50 is formed on the upper surface 11 of the packaging bag 10 when the first slit 20 is opened. Also, when the width of the first slit 20 in the fifth direction (Y direction) is shorter than the length L3 of the third slit 60, an outlet OP whose width dimension in the fifth direction (Y direction) is shorter than the length L3 of the third slit 60 is formed when the first slit 20 is opened.

By forming the first slit 20 into an outlet OP having such a width, the first slit 20 (outlet OP) that has been opened becomes even easier to open. Therefore, by forming the first slit 20 into such a width, it becomes even easier to remove the sheet ST from the outlet OP formed by the first slit 20 (such as removing the first sheet ST (sheet stack SL) contained in the packaging bag 10).

Furthermore, because the first slit 20 has such a width, the frictional force (or resistance force) acting on the first slit 20 (take-out opening OP) when the sheet ST is taken out (or pulled out) from the first slit 20 (take-out opening OP) during use is reduced. Therefore, according to each of the modified examples of the first to fourth embodiments (configurations in which the first slit 20 has the above-mentioned width) , even if the remaining sheet ST becomes small during use, it is possible to reliably prevent the packaging bag 10 from lifting up.

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.

[Sheet packaging (test specimen)]
As a test specimen, a sheet packaging body 100 in which a sheet laminate SL in which a plurality of sheets ST are laminated is packaged in a packaging bag 10 was prepared (see Figs. 1 and 7). For the sheet laminate SL, tissue paper (trade name "Hello Soft Pack tissue", manufactured by Universal Paper Co., Ltd., 2 plies, 300 sheets, dimensions: length approx. 205 mm, width approx. 195 mm) in which the sheets ST are alternately folded and stacked so that they can be pulled out one by one in a pop-up style was used. In addition, the sheet laminate SL was placed in the packaging bag 10 so that the stacking direction (SD direction) was the height direction (Z direction) of the sheet packaging body 100 (see Figs. 1 and 7). In addition, the material of the packaging bag 10 was polyethylene (PE) with a thickness of 50 μm. As for the packaging form of the packaging bag 10, both ends of the sheet packaging body 100 were sealed with caramel packaging (sealed portions 30 and 40 were formed). The dimensions of the sheet packaging body 100 were approximately 200 mm in the longitudinal direction (X direction), approximately 105 mm in the depth direction (Y direction), and approximately 40 mm in the height direction (Z direction). A first slit 20 (perforation) extending in a first direction (X direction) was formed on the upper surface 11 of the packaging bag 10. The dimension (length L1) of the first slit 20 (perforation) was approximately 185 mm in the first direction (X direction).

[Pull-out resistance]
The pull-out resistance of the sheet packaging body 100 was confirmed. In the check of the pull-out resistance, the above-mentioned test body (sheet packaging body 100) was placed on a flat placement surface, about half of the first set of tissue paper (sheet ST) was pulled out from the take-out opening (first slit 20) of the packaging bag 10, and the upper end of the pulled-out sheet ST (the central part in the longitudinal direction (X direction) of the sheet packaging body 100) was clamped with an eye clip (manufactured by KOKUYO Co., Ltd., "Clee-17"). A hook of a push-pull gauge (manufactured by IMADA Co., Ltd., model number: Z2-20) was passed through one hole of the handle part of the eye clip, and the resistance force (unit: kgf) when the tissue paper was pulled out in a direction perpendicular to the upper surface 11 of the packaging bag 10 at a constant speed over a period of 0.4 to 0.6 seconds was measured as the pull-out resistance . The evaluation criteria for the pull-out resistance were as follows: if the resistance force when pulling out was 0.2 kgf or less, it was evaluated as good (the sheet ST was easy to remove), and if it exceeded 0.2 kgf, it was evaluated as not good (the sheet ST was difficult to remove).

[Removability (initial)]
The initial take-out property of the sheet packaging body 100 was confirmed. In the check of the take-out property, the ease of take-out when taking out the first sheet ST of the sheet stack SL from the sheet stack SL contained in the packaging bag 10 of the sheet packaging body 100 through the opened first slit 20 (take-out opening OP) of the packaging bag 10 was evaluated. The take-out property (initial stage) was evaluated according to the following criteria.
5: The first pair is very easy to pick up 4: The first pair is easy to pick up 3: I can pick up the first pair 2: I can pick up the first pair but it's hard to pick up 1: I can pick up the first pair but it's very hard to pick up

[Non-depressing]
The non-sagging property of the sheet ST contained in the packaging bag 10 of the sheet packaging body 100 was confirmed. In the confirmation of the non-sagging property, whether the sheet ST would not sag into the packaging bag 10 (non-sagging property) was evaluated when the sheet ST was pulled out from the sheet stack SL through the first slit 20 of the packaging bag 10. The non-sagging property was evaluated according to the following criteria.
5: No sagging of the sheet ST 4: The sheet ST sagging occurs once or more and no more than three times 3: The sheet ST sagging occurs four or more and no more than six times 2: The sheet ST sagging occurs seven or more and no more than nine times 1: The sheet ST sagging occurs ten or more times

[Non-lifting]
The non-lifting property of the packaging bag 10 containing the sheet ST of the sheet packaging body 100 was confirmed. In the confirmation of the non-lifting property, whether the packaging bag 10 is lifted (non-lifting property) was evaluated when the sheet ST is pulled out from the sheet stack SL through the first slit 20 of the sheet packaging body 100. The non-lifting property was evaluated according to the following criteria.
5: The packaging bag 10 does not lift up; 4: The number of remaining sheets ST is 1 to 3, and the packaging bag 10 lifts up; 3: The number of remaining sheets ST is 4 to 6, and the packaging bag 10 lifts up; 2: The number of remaining sheets ST is 7 to 9, and the packaging bag 10 lifts up; 1: The number of remaining sheets ST is 10 or more, and the packaging bag 10 lifts up;

The following describes examples and comparative examples.

[Example 1]
In the sheet packaging body 100, as shown in Figs. 1 and 2, a second slit 50 extending in a second direction (X direction) parallel to the first direction (X direction) was formed in the central portion 11b of the upper surface 11 of the packaging bag 10. The length L2 of the second slit 50 was about 20 mm in the second direction (X direction). The distance D1 from the first slit 20 to the second slit 50 was about 5 mm in the third direction (Y direction). The pull-out resistance, take-out property (initial), non-sagging property, and non-lifting property were evaluated for this test specimen. The results are shown in Table 1.

[Example 2]
In the sheet packaging body 100, the second slit 50 has first partial slits 51, 52, and 53 extending in the second direction (X direction), the first partial slits 51, 52, and 53 are arranged side by side in a third direction (Y direction) intersecting the first direction (X direction), the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53 are about 20 mm in the second direction (X direction), and the distances from the first slit 20 to the first partial slits 51, 52, and 53 are about 5 mm, about 10 mm, and about 15 mm in the third direction (Y direction), respectively. A test specimen was prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Example 3]
In the sheet packaging body 100, the first partial slits 51, 52, and 53 constituting the second slit 50 are arranged so as to become shorter as they move away from the first slit 20 in the third direction (Y direction), and the lengths L21, L22, and L23 of the first partial slits 51, 52, and 53 are set to about 30 mm, about 20 mm, and about 10 mm, respectively, in the second direction (X direction). A test specimen was prepared and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[Example 4]
In the sheet packaging body 100, as shown in Fig. 4, a third slit 60 extending in a fourth direction (X direction) parallel to the first direction (X direction) was further formed in the central portion 11b of the upper surface 11 of the packaging bag 10, the length L3 of the third slit 60 was about 20 mm in the second direction (X direction), and the distance D2 from the first slit 20 to the third slit 60 was about 5 mm in the third direction (Y direction). Except for this, a test specimen was prepared and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Example 5]
In the sheet packaging body 100, a test specimen was prepared and evaluated in the same manner as in Example 4, except that the length L2 of the second slit 50 was set to about 40 mm in the second direction (X direction) and the length L3 of the third slit 60 was set to about 40 mm in the fourth direction (X direction). The results are shown in Table 1.

[Example 6]
In the sheet packaging body 100, as shown in Fig. 5, second partial slits 61, 62, and 63 extending in the fourth direction (X direction) are further provided as the third slit 60 in the central portion 11b of the upper surface 11 of the packaging bag 10, and the second partial slits 61, 62, and 63 are arranged in a line in the fifth direction (Y direction) intersecting with the first direction (X direction), and the lengths L31, L32, and L33 of the second partial slits 61, 62, and 63 are about 20 mm in the fourth direction (X direction), and the distances from the first slit 20 to the first partial slits 51, 52, and 53 are about 5 mm, about 10 mm, and about 15 mm in the fifth direction (Y direction), respectively. A test specimen was prepared and evaluated in the same manner as in Example 2. The results are shown in Table 1.

[Example 7]
In the sheet packaging body 100, as shown in Fig. 5, the second partial slits 61, 62, and 63 constituting the third slit 60 are arranged so as to become shorter as they move away from the first slit 20 in the fifth direction (Y direction), and the lengths L31, L32, and L33 of the second partial slits 61, 62, and 63 are about 30 mm, about 20 mm, and about 10 mm, respectively, in the fourth direction (X direction). A test specimen was prepared and evaluated in the same manner as in Example 6. The results are shown in Table 1.

[Comparative Example 1]
1 and 2, the sheet wrapping body 100 was evaluated in the same manner as in Example 1, except that the second slit 50 was not formed (see FIGS. 7 and 8). The results are shown in Table 1.

As can be seen from Table 1, the sheet packaging body 100 in which a first slit 20 extending in a first direction (X direction) is formed on the upper surface 11 of the packaging bag 10, and a second slit 50 extending in a second direction (X direction) parallel to the first direction (X direction) is formed in the central portion 11b of the upper surface 11 of the packaging bag 10, exhibited good pull-out resistance, removal property (initial), anti-sagging property, and anti-lifting property (Examples 1 to 7).

In addition, the sheet packaging body 100 in which the second slits 50 are formed as a plurality of first partial slits 51, 52, 53 extending in the second direction (X direction) has both improved pull-out resistance and initial removal properties (Examples 2 and 3). In addition, the sheet packaging body 100 in which the first partial slits 51, 52, 53 constituting the second slits 50 are arranged so that they become shorter as they move away from the first slit 20 in the third direction (Y direction) has further improved pull-out resistance (Example 3).

The sheet packaging body 100 further having a third slit 60 extending in a fourth direction (X direction) parallel to the first direction (X direction) had improved pull-out resistance (Examples 4 to 7). Furthermore, the sheet packaging body 100 having multiple second partial slits 61, 62, 63 extending in the fourth direction (X direction) as the third slit 60 had improved pull-out resistance and initial removal properties (Examples 6 and 7).

On the other hand, in the sheet packaging body 100 in which neither the second slit 50 nor the third slit 60 was formed, the pull-out resistance, the removal property (initial), the anti-sagging property, and the anti-lifting property were all poor (Comparative Example 1).

These results show that a sheet packaging body having a first slit formed on the upper surface of a packaging bag and extending in a first direction, and a second slit formed on the upper surface of the packaging body and extending in a second direction parallel to the first direction, has excellent sheet removal properties.

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 ST Sheet (sanitary tissue paper)
SL: laminated sheet body 10: packaging bag 11: upper surface 11a: center 11b: central portion 11c: periphery 12: lower surface 13: front surface 14: rear surface 15: side surface 16: side surface 20: first slit 20a: center OP: outlet 30: sealed portion 40: sealed portion 50: second slit 51, 52, 53: first partial slit 60: third slit 61, 62, 63: second partial slit BS: buffer portion

Claims (8)

A plurality of stacked sheets;
A packaging bag containing the sheet;
A first slit is formed on an upper surface of the packaging bag and extends in a first direction;
a second slit formed in a central portion of the upper surface and extending in a second direction parallel to the first direction;
The length of the second slit is shorter than the length of the first slit,
A sheet packaging body, wherein a ratio of the length of the second slit to the length of the first slit is 5 to 22 %. the second slit has a plurality of first partial slits extending in the second direction,
The sheet packaging body according to claim 1 , wherein the first partial slits are aligned in a third direction intersecting the first direction. The sheet packaging body according to claim 2, wherein the length of the first partial slit is shorter the further away from the first slit in the third direction. a third slit formed on the upper surface and extending in a fourth direction parallel to the first direction;
The sheet packaging body according to claim 1 , wherein the third slit is arranged between the second slit and the first slit. The sheet packaging body according to claim 4, wherein the length of the third slit is shorter than the length of the first slit. The sheet packaging body according to claim 4 or 5, wherein the third slit is formed in the center of the upper surface. the third slit has a plurality of second partial slits extending in the fourth direction,
The sheet packaging body according to claim 4 , wherein the second partial slits are aligned in a fifth direction intersecting the first direction. The sheet packaging body according to claim 7, wherein the length of the second partial slit is shorter as it moves away from the first slit in the fifth direction.

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