JP7403278B2 - sheet packaging - Google Patents

Description

The present invention relates to a sheet package.

BACKGROUND ART Sanitary tissue paper such as tissue paper is widely packaged in cartons (cardboard boxes). However, in recent years, sheets of sanitary tissue paper such as carton-type sanitary tissue paper have been stored in flexible film packaging bags due to the bulkiness of carton-type sanitary tissue paper when carrying and storing it, disposal after use, environmental impact, cost, etc. Demand for sheet packaging is increasing. In such a sheet package, a slit (perforation, etc.) for taking out the sheet is formed on the top surface of the film packaging bag (for example, see Patent Documents 1 and 2).

Japanese Patent Application Publication No. 2008-183034 Japanese Patent Application Publication No. 2018-177364

However, in a sheet package whose outlet is formed with a slit, when taking out the sheets from the sheet packaging bag, it is difficult to take out the first one (or one set) of the plurality of sheets stored therein. Further, when taking out the sheet, the sheet may become jammed at the outlet, the sheet may be torn, or the packaging bag may be torn near the outlet. In addition, at the outlet formed by the slit, the holding force of the sheet decreases during use, and the sheet may fall into the packaging bag. Furthermore, since the film packaging bag is lighter than the carton, if there are few remaining sheets during use, the film packaging bag may be lifted up when the sheet is taken out, making it impossible to pull out the sheet. As described above, conventional sheet packaging bodies have various problems in taking out the sheets.

An object of the present invention is to provide a sheet package that is excellent in taking out sheets.

A first aspect of the present invention includes a packaging bag that accommodates a plurality of stacked sheets, and an outlet formed on a top surface of the packaging bag and extending in a first direction, and the outlet is , a first slit extending in the first direction so as to be convex from one side to the other in a second direction intersecting the first direction; and a first slit extending from the first slit to both ends of the first slit. and a second slit extending from the one side to the other side in the second direction so as to curve away from the first direction.

In this specification, the first direction refers to a direction along a predetermined direction on the top surface of the packaging bag. The second direction intersecting the first direction refers to a direction perpendicular to a direction along a predetermined direction on the top surface of the packaging bag or a direction along a direction intersecting the brace. The slit is formed on the top surface of the packaging bag and is a continuous cut, an elongated opening, or the like, and the continuous cut may be formed by breaking a perforation.

In the first aspect, the outlet formed in the top surface of the packaging bag has a first slit extending in the first direction so as to be convex from one side to the other side in the second direction. When opening, a part of the top surface (a second flap to be described later) that covers the outlet (opening) tends to be folded upward (or easily bent) in the vicinity of the first slit. As a result, in the first aspect, the ejection port can be easily opened with a fingertip, and the sheet can be removed from the packaging bag (e.g., the first sheet or the first set of sheets stored in the packaging bag can be removed). becomes easier.

Further, in the first aspect, the outlet formed in the top surface of the packaging bag has a second opening extending from one side in the second direction to the other side so as to curve further away from the first slit in the first direction. By having the slit, a part of the top surface (a first flap to be described later) that covers the outlet (opening) is easily rolled up (or easily bent) even in the vicinity of the second slit. As a result, in the first aspect, when the sheet is pulled out from the ejection port, the opening width of the ejection port (opening) is expanded near both the first slit and the second slit, and the sheet can be smoothly taken out from the ejection port. Can be done.

Further, in the first aspect, the curved second slits are provided at both ends of the first slit, so that when opening (or unsealing) the outlet, the outlet corresponding to the curved second slit It becomes easier to put your fingers on both ends in the first direction. Therefore, the outlet can be opened (or unsealed) using both ends of the outlet as a trigger. Therefore, in the first aspect, it is easy to unseal (or unseal) the outlet.

Further, in the first aspect, since both ends of the outlet in the first direction are curved toward the outside of the outlet in the first direction in correspondence with the curved second slit, the two ends of the outlet and the pulled out This can reduce friction with the sheet being applied. This prevents the sheet from getting caught at each end of the outlet or from tearing when the sheet is pulled out. In the first aspect, also from this point of view, the sheet can be smoothly taken out from the takeout port.

In addition, in the first aspect, when the sheet is pulled out from the ejection port, a portion of the top surface (a first flap to be described later) and a second flap) can flex (or deform) in the vicinity of each slit. As a result, in the first aspect, the holding force of the sheet at the outlet is maintained, and it is possible to prevent the sheet from falling into the packaging bag during use (hereinafter referred to as sheet falling).

Further, in the first aspect, when the sheet is pulled out from the ejection port, a portion of the top surface is bent (or deformed) near the first slit and the second slit as described above, so that the sheet is pulled out from the ejection port. The frictional force (or resistance force) applied to the opening can be released (or dispersed) around the outlet. As a result, even if there are fewer sheets left in the packaging bag (even if the weight of the sheet packaging becomes lighter), the entire packaging bag will be lifted up when the sheet is pulled out from the outlet (hereinafter referred to as the packaging bag). (called lifting) can be prevented.

In addition, in the first aspect, as described above, a portion of the top surface is bent (or deformed) near the first slit and the second slit, so that the sheet pulled out from the outlet is bent near each slit. Maintains good balance. As a result, the sheet pulled out from the ejection port can be held at the ejection port in a state where it stands up above the ejection port (this can prevent the sheet from being held in a fallen or tilted state). ).

Further, in the first aspect, since the outlet is configured with the first slit and the second slit, the outlet opening in the top surface is not left open. Therefore, in the first aspect, it is difficult for foreign matter such as dust to enter the packaging bag from the outlet.

Furthermore, in the first aspect, since the outlet is composed of the first slit and the second slit, each slit can directly constitute the opening of the outlet. Therefore, in the first aspect, no broken pieces (cut ends, small pieces, fragments, etc. cut off from the packaging bag) are generated when the outlet is opened.

In a second aspect of the present invention, the second slit has one end connected to the first slit and the other end connected to the other side away from the convex top of the first slit in the second direction. It is a sheet packaging body located. In this specification, the convex top of the first slit is the part where the distance from the edge of the top surface located on the other side in the second direction to the first slit along the second direction is the shortest.

In this specification, one end connected to the first slit means that one end of the second slit is formed continuously to both ends of the first slit. In addition, the other end is located on the other side away from the convex top of the first slit in the second direction. This indicates that the distance to the other end is shorter than the distance from the edge of the top surface to the top of the convexity of the first slit.

In the second aspect, one end of the second slit is connected to the first slit, and the other end is located on the other side away from the convex top of the first slit in the second direction, so that part of the top surface ( A first flap (to be described later) can be largely bent (or deformed) near the second slit. As a result, when the sheet is pulled out from the outlet, the width of the opening of the outlet increases in the vicinity of the second slit, making it possible to smoothly take out the sheet from the outlet with high precision.

In addition, in the second aspect, as described above, a portion of the top surface is largely bent (or deformed) in the vicinity of the second slit, so that the holding force of the sheet at the outlet is further maintained, and the sheet slumps. can be prevented with high precision. Further, the frictional force (or resistance force) applied to the outlet can be further released (or scattered) around the outlet, and lifting of the packaging bag can be prevented with high precision.

Furthermore, in the second aspect, as described above, a portion of the top surface is largely bent (or deformed) in the vicinity of the second slit, so that the sheet pulled out from the ejection port can be moved between the first slit and the second slit. It can also be maintained in a better balance. Thereby, it is possible to achieve with high precision that the sheet pulled out from the outlet is held in the outlet in a state in which it stands up above the outlet.

A third aspect of the present invention is a sheet package in which the second slit has an arcuate shape. Here, the term "arc-shaped" indicates that the slit is curved to draw part of a circle.

In the third aspect, by making the shape of the second slit arcuate, the edges of both ends of the outlet in the first direction can be made arcuate. This further reduces the friction of the sheet against both ends of the outlet, and it is possible to prevent the sheet from getting caught at the ends of the outlet or tearing with high precision when pulling out the sheet.

A fourth aspect of the present invention is a sheet package, wherein at least the convex top of the first slit is curved. Here, the phrase "at least the top of the convexity is curved" means that the portion of the first slit other than the top of the convexity may be curved or straight.

In the fourth aspect, by making at least the convex top of the first slit curved, the top of the first slit is less likely to provide resistance to the sheet being pulled out from the takeout port, and the sheet held at the takeout port is On the other hand, the top of the first slit becomes easily caught. Therefore, according to the fourth aspect, it is possible to prevent the sheet from falling and the packaging bag from rising while maintaining smooth removal of the sheet from the outlet.

A fifth aspect of the present invention is a sheet packaging body having a first flap surrounded by the first slit, the second slit, and a first base end extending in the first direction. In this specification, the flap is formed on the top surface of the packaging bag, and is formed of a part of the packaging bag that bends (or deforms) due to frictional force (or resistance force) when the sheet is pulled out from the outlet. . Moreover, the proximal end refers to the end of the flap that is the starting point from which the flap bends (or deforms). Note that the first base end is configured on the other side in the second direction.

In the fifth aspect, by providing the above-described first slit and second slit on the top surface of the packaging bag, a first flap surrounded by the first slit, the second slit, and the first base end can be configured. can. In such a first flap, the vicinity of the first slit is recessed (forming a recess) inside the outlet, and the vicinity of the second slit is easily bent (or deformed). As a result, in the fifth aspect, the sheet is held at the outlet without being hindered from smoothly pulling out the sheet, and the falling of the sheet and the lifting of the packaging bag are suppressed.

Furthermore, in the fifth aspect, the first flap is surrounded by the first slit, the second slit, and the first base end, so that the outlet can be covered with the first flap. Therefore, in the fifth aspect, the outlet is not left open, and it is possible to suppress the intrusion of foreign substances such as dirt and dust from the outlet into the packaging bag.

Furthermore, in the fifth aspect, the first flap is surrounded by the first slit, the second slit, and the first base end, so that the first flap is connected to the top surface of the packaging bag via the first base end. It is installed at the outlet in a state where the Therefore, in the fifth aspect, it is possible to prevent the generation of broken pieces when opening the outlet.

A sixth aspect of the present invention is a sheet packaging body having a second flap surrounded by the first slit and a second base end extending in the first direction. Note that the second base end is configured on one side in the second direction. In the sixth aspect, by providing the above-described first slit and second slit on the top surface of the packaging bag, the second flap surrounded by the first slit and the second base end extending in the first direction can be It can be configured with one flap.

The second flap has a convex portion near the first slit (forms a convex portion) inside the outlet, and is arranged in the second direction in line with the first flap. Thereby, the second flap can hold the sheet pulled out from the outlet in a well-balanced manner with the first flap. Therefore, in the sixth aspect, it is possible to achieve with high precision that the sheet pulled out from the outlet is held in the outlet while standing up above the outlet.

Further, in the sixth aspect, the second flap is surrounded by the first slit and the second base end, so that the outlet can be covered with the second flap together with the first flap. Therefore, in the sixth aspect as well, the outlet is not left open, and it is possible to highly accurately prevent foreign matter such as dirt from entering the packaging bag from the outlet.

Furthermore, in the sixth aspect, the second flap is surrounded by the first slit and the second base end, so that the second flap is attached to the top surface of the packaging bag via the second base end. installed at the exit. Therefore, in the sixth aspect as well, it is possible to prevent the generation of broken pieces when opening the outlet.

A seventh aspect of the present invention is a sheet packaging body having a third flap surrounded by the second slit and a third base end extending in the second direction. Note that the third base ends are formed at both ends of the first slit, and extend from one end of the second slit toward the other end along the second direction. In a seventh aspect, the above-described first slit and second slit are provided on the top surface of the packaging bag, thereby forming a third flap surrounded by the second slit and a third base end extending in the second direction. Can be done.

Such a third flap can constitute a portion that is easily bent (or easily deformed) at both ends of the first flap in the first direction. As a result, in the seventh aspect, the sheet is further held at the outlet without being hindered from being pulled out, and the dropping of the sheet and the lifting of the packaging bag are suppressed with even higher accuracy.

Moreover, the third flap can hold the sheet pulled out from the outlet in a well-balanced manner with the second flap together with the first flap. Therefore, in the seventh aspect, it is possible to achieve, with even higher accuracy, that the sheet pulled out from the outlet is held in the outlet in a state in which it stands up above the outlet.

Further, in the seventh aspect, the third flap is surrounded by the second slit and the third base end, so that the third flap can be covered with the first flap and the second flap. Therefore, in the seventh aspect as well, the outlet is not left open, and it is possible to highly accurately prevent foreign matter such as dirt from entering the packaging bag from the outlet.

Furthermore, in the seventh aspect, the third flap is surrounded by the second slit and the third base end, so that the third flap is connected to the top surface of the packaging bag via the first flap, and the third flap is connected to the top surface of the packaging bag via the first flap. established in Therefore, in the seventh aspect as well, it is possible to prevent the generation of broken pieces when opening the outlet.

According to one aspect of the present invention, it is possible to provide a sheet package that is excellent in taking out sheets.

FIG. 1 is a diagram showing a sheet package according to an embodiment (first embodiment) of the present invention. FIG. 3 is a view of the sheet package according to the first embodiment viewed from above. FIG. 3 is a diagram showing an outlet in the sheet package according to the first embodiment. FIG. 3 is a diagram showing an end of an outlet in the sheet package according to the first embodiment. In the sheet package according to the first embodiment, it is a diagram showing an outlet after opening. It is a figure showing the use state of the sheet package concerning a 1st embodiment. FIG. 7 is a view of the vicinity of the outlet in FIG. 6 viewed from the left side. 7 is a front view of the vicinity of the outlet in FIG. 6. FIG. FIG. 7 is a diagram illustrating an outlet in a sheet package according to a second embodiment. FIG. 7 is a diagram showing an outlet after opening in a sheet package according to a second embodiment. FIG. 2 is a diagram showing a conventional sheet packaging body (with an outlet configured with a linear slit). FIG. 2 is a diagram showing a conventional sheet packaging body (with an ejection opening configured with an elliptical slit).

Embodiments of the present invention will be described in detail with reference to the drawings. Common parts in each figure may be given the same reference numerals and descriptions thereof may be omitted. Further, in order to facilitate understanding, the scale of each member in each drawing may be different from the actual scale.

In addition, in this specification, a three-dimensional orthogonal coordinate system of three axial directions (X direction, Y direction, Z direction) is used, and the longitudinal direction or left and right direction (hereinafter referred to as the first direction) of the sheet package is defined as the X direction. , the width direction or the depth direction (hereinafter referred to as the second direction) is the Y direction, and the height direction or the vertical direction is the Z direction. Moreover, the upper side refers to the upper side of the top surface of the packaging bag in the height direction (Z direction) of the sheet packaging body.

FIG. 1 is a diagram showing a sheet package according to a first embodiment of the present invention. FIG. 2 is a top view of the sheet package according to the first embodiment. FIG. 3 is a diagram showing the outlet in the sheet package according to the first embodiment, FIG. 4 is a diagram showing the end of the outlet, and FIG. 5 is a diagram showing the outlet after opening. It is. FIG. 6 is a diagram showing the usage state of the sheet package according to the first embodiment, FIG. 7 is a diagram of the vicinity of the outlet in FIG. 6 viewed from the left side, and FIG. It is a front view of the vicinity of the exit.

The sheet package 100 according to the first embodiment has a packaging bag 10 and an outlet 20, as shown in FIG. The sheet package 100 is an example of a sheet package according to the present invention. Furthermore, the packaging bag 10 is an example of a packaging bag constituting the sheet packaging body according to the present invention, and the outlet 20 is an example of an outlet formed in the packaging bag.

The packaging bag 10 accommodates a plurality of sheets (or a plurality of sets) of sheets S. As shown in FIG. 1, the sheets S are stored in a packaging bag 10 as a laminate SL (hereinafter referred to as a sheet laminate) in which a plurality of sheets (or a plurality of sets) of sheets S are stacked. The sheet stack SL is housed in the packaging bag 10 such that the stacking direction (SD direction) of the sheets S is the height direction (Z direction). The sheet stack SL is configured such that the sheets S can be pulled out one by one (or one set at a time) through an outlet 20 (opening OP) formed in the packaging bag 10 (see FIG. 6).

From the viewpoint of pulling out the sheets S one by one or one set at a time, the sheet stack SL is preferably one in which the sheets S are folded and stacked alternately (a so-called pop-up sheet stack SL). Further, the form of the sheet stack SL is not limited to one that can be pulled out in a pop-up manner, but may be one in which multiple sheets (or multiple sets) of sheets S are simply stacked, or one in which each sheet S is stacked in a folded state. But that's fine.

The dimensions of the sheet laminate SL are such that the length of the sheet package 100 in the first direction (X direction) is 80 mm or more and 250 mm or less, and the depth direction (Y The length in the direction) can be 50 mm or more and 130 mm or less, and the height in the height direction (Z direction) can be 10 mm or more and 90 mm or less. Such tissue paper laminates can be produced, for example, by rotary or multi-stand interfolders.

The use of the sheet S is not particularly limited, and can be applied to, for example, sanitary thin paper such as tissue paper, toilet paper, kitchen paper, and paper towel. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissues, etc.). Further, the use of the sanitary thin paper constituting the sheet S is not particularly limited, and can be applied to any of industrial, home, and portable uses. In addition, the sheet package 100 of this embodiment is suitably used for household tissue paper among these.

The number of plies of the sheet S is not particularly limited, but it can be one or more, preferably one ply, and more preferably two plies (two sheets stacked). Further, the shape of the sheet S is not particularly limited, but, for example, it is preferable that the shape of the two-ply sheet in a folded state is rectangular in plan view.

The material of the sheet S is not particularly limited, but for example, a sheet of paper, nonwoven fabric, or cloth can be used, and paper (paper sheet) is preferable. Note that when the sheet S is a paper sheet, a base paper whose main raw material is pulp is used. As the pulp composition, a known composition for paper sheets can be used. For example, the blending ratio of pulp can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

Further, the pulp composition in the sheet S (paper sheet) is not particularly limited. For example, 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 in any ratio. Can be done. Note that the ratio of softwood pulp to hardwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably a pulp composition in which the ratio of softwood pulp to hardwood pulp is higher. Furthermore, waste paper pulp may be used as the pulp contained in the sheet S (paper sheet).

The basis weight of the sheet S is not particularly limited, but depending on the number of plies, it is 5 g/m ² or more and 80 g/m ² or less in the case of paper, and 20 g/m ² or more and 100 g/m ² or less in the case of nonwoven fabric. desirable. Note that the basis weight is measured in accordance with the regulations of JIS P 8124.

Further, the thickness of the sheet S (paper sheet) is not particularly limited, and a paper thickness measured under the environment of JIS P 8111 (1998) can be adopted. For example, the paper thickness of the paper sheet constituting the sheet S can be 50 μm or more and 500 μm or less, and preferably 60 μm or more and 330 μm or less per 2 plies.

Further, the sheet S (paper sheet) may be embossed. Such embossing is performed by pressing embossments (not shown) onto both ends of paper sheets using a known contact embossing method, edge embossing method, etc., and stacking multiple paper sheets (or multiple sets), or by using a known pin. The embossing method involves pricking a paper sheet with a pin (not shown) to form a pin embossing on one side of the paper sheet, and the known embossing method involves heating and melting a water-soluble adhesive (starch, etc.). In some cases, embossing is formed by gluing stacked paper sheets (not shown).

The form of the packaging bag 10 is not particularly limited, and may be formed of a flexible film, for example. Moreover, the packaging bag 10 is manufactured by so-called caramel packaging. Specifically, both ends of the cylindrical flexible film are formed with seal parts 30 and 40 that are folded and bonded (sealed) (see FIG. 1). Note that the packaging form of the sheet packaging body 100 is not limited to such caramel packaging, but may also be a gusset-like packaging in which both ends or either end of a cylindrical flexible film is heat-sealed. (manufactured in so-called pillow packaging).

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

Among these flexible films, polyethylene, polypropylene, polyethylene terephthalate, and the like are preferred because they are flexible and easy to handle, have high sealability when heat-sealed, and are inexpensive. Further, polyethylene is preferred because it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost. As the polyethylene, high density polyethylene, low density polyethylene, etc. can be used. Further, polypropylene is preferable from the viewpoints of being strong, easy to mold, showing good color development during printing, and being able 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 formed by laminating the above-mentioned resins, or a laminate film formed of two or more of the above-mentioned resins. It may also be a mixed film formed of a mixture of.

The thickness of the flexible film forming the packaging bag 10 is not particularly limited, and is preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 70 μm or less. By setting the thickness of the flexible film to 20 μm or more, sufficient strength as the packaging bag 10 in which the sheet S is accommodated can be ensured. Moreover, by setting the thickness of the flexible film to 100 μm or less, flexibility and lightness of the packaging bag 10 can be ensured, and costs can be suppressed.

Note that the material forming the packaging bag 10 is not limited to the above-mentioned resin material such as the flexible film, and a paper material may also be used. In addition, the materials forming the packaging bag 10 include biodegradable materials (biodegradable plastic, biodegradable paper, etc.), biomass materials (renewable organic resources derived from living organisms such as biomass film, excluding fossil resources). ) can be used.

In the sheet packaging body 100 of this embodiment, the packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, a side surface 15, and a side surface 16. In the sheet package 100, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the front surface 13 and the back surface 14 face each other in the front-rear direction (Y direction), and the side surfaces 15 and 16 face each other in the left-right direction (X 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 FIG. 1).

Further, the outlet 20 is formed on the top surface 11 of the packaging bag 10 and extends in the first direction (X direction). Specifically, the outlet 20 is located at the center 11a of the top surface 11 of the packaging bag 10 in the first direction (X direction) of the sheet package 100 and at the center 11a of the top surface 11 of the packaging bag 10 in the second direction (Y direction). It is arranged at the center 11b and extends along the first direction (X direction) (see FIG. 1). The sheet S is pulled out from this outlet 20 (see FIG. 6).

Note that in the first direction (X direction), the dimension (length L2) of the outlet 20 can be arbitrarily determined depending on the capacity of the packaging bag 10 and the dimension of the sheet S. For example, the length L2 of the outlet 20 in the left-right direction (X direction) can be 100% or less, preferably 5%, of the width (length L1) of the packaging bag 10 in which the sheet S is accommodated. It is 80% or less, more preferably 10% or more and 75% or less (see FIG. 2).

The outlet 20 is formed to include a first slit 21 extending in the first direction (X direction). In this embodiment, it has a first slit 21 and second slits 22 and 23. The first slit 21 is an example of a first slit that constitutes a part of the outlet in the sheet package according to the present invention. Further, the second slits 22 and 23 are examples of second slits that constitute another part of the outlet in the sheet package according to the present invention.

The first slit 21 is convex from one side (the back side 14 of the packaging bag 10) to the other side (the front side 13 of the packaging bag 10) in a second direction (Y direction) intersecting the first direction (X direction). It extends in the first direction (X direction) so that Here, the first direction (X direction) refers to a direction along a predetermined direction on the top surface 11 of the packaging bag 10. The second direction (Y direction) that intersects with the first direction (X direction) refers to a direction perpendicular to a predetermined direction on the top surface 11 of the packaging bag 10 or a direction that intersects with the brace. show.

In addition, being convex from one side to the other side in the second direction (Y direction) means that the entire or part of the first slit 21 extends from the back surface 14 side of the packaging bag 10 along the second direction (Y direction). It shows that it is formed so as to be convex toward the front side 13 of the packaging bag 10. In this embodiment, the entire first slit 21 is convex from one side (the back side 14 of the packaging bag 10) to the other side (the front side 13 of the packaging bag 10) in the second direction (Y direction). It extends in the first direction (X direction) (see FIGS. 2 and 3).

Note that the form of the first slit 21 is not particularly limited, and may be formed of, for example, a continuous cut, an elongated opening, or the like. Further, the first slit 21 may be formed by tearing a perforation formed by a plurality of cuts. In this embodiment, as shown in FIGS. 1 to 4, the first slit 21 formed in the top surface 11 of the packaging bag 10 is configured with a perforation M1. In this embodiment, by tearing this first slit 21 (perforation M1), the top surface 11 of the packaging bag 10 can be opened in the first direction (X direction) and can form part of the opening OP. (See Figure 6).

The first slit 21 includes a base portion 21a extending along the first direction (X direction), and end portions 21b and 21c located on the back surface 14 side of the packaging bag 10 following the respective ends G1 and G2 of the base portion 21a. has. Thereby, the first slit 21 is formed in a convex shape, and the base portion 21a constitutes the top portion V (see FIG. 3).

Further, the first slit 21 (perforation M1) forming a part of the outlet 20 is configured by alternately arranging cuts C1 and ties T1 (see FIG. 3). Note that the tie T1 is an uncut portion between two adjacent cuts C1.

In the first slit 21 (perforation M1), the length of the cut C1 and the length of the tie T1 are arbitrary. The length of each cut C1 can be 0.8 mm or more and 5.0 mm or less, preferably 1.5 mm or more and 4.5 mm or less, and more preferably 2.5 mm or more and 3.5 mm or less. Further, the length of each tie T can be 0.3 mm or more and 5.0 mm or less, preferably 0.4 mm or more and 2.0 mm or less, and more preferably 0.5 mm or more and 1.5 mm or less.

The second slits 22 and 23 are curved away from the first slit 21 in the first direction (X direction) from one side (back side 14 of the packaging bag 10) to the other side in the second direction (Y direction). (towards the front 13 side of the packaging bag 10). Here, curving away from the first slit 21 in the first direction (X direction) means that the second slit 22 curves concavely from the first slit 21 toward the side surface 15 of the packaging bag 10; The second slit 23 is shown to be concavely bent from the first slit 21 toward the side surface 16 of the packaging bag 10.

Note that the form of the second slits 22 and 23 is not particularly limited, and may be configured, for example, as a continuous cut, an elongated opening, or the like. Further, the second slits 22 and 23 may be formed by tearing perforations formed by a plurality of cuts. In this embodiment, as shown in FIGS. 1 to 4, the second slits 22 and 23 formed in the top surface 11 of the packaging bag 10 are configured with perforations M2. Then, by tearing the second slits 22 and 23 (perforation M2), the top surface 11 of the packaging bag 10 is curved in a second direction away from the first slit 21 in the first direction (X direction). It is opened in the Y direction and can form part of the opening OP (see FIG. 6).

Specifically, the second slit 22 includes one end 22a, the other end 22b, and a base 22c. The second slit 22 has one end 22a connected to the first slit 21, and the other end 22b connected to the other side (front side 13 of the packaging bag 10) away from the convex top V of the first slit 21 in the second direction (Y direction). side) (see Figures 2 to 4).

Further, the second slit 23 includes one end 23a, the other end 23b, and a base 23c. The second slit 23 has one end 23a connected to the first slit 21, and the other end 23b connected to the other side (front side 13 of the packaging bag 10) away from the convex top V of the first slit 21 in the second direction (Y direction). side) (see Figures 2 and 3).

Here, the convex top V of the first slit 21 extends from the edge 11c of the top surface 11 located on the other side (the front 13 side of the packaging bag 10) in the second direction (Y direction). ) is the portion where the distance D1 to the first slit 21 is the shortest (the portion where the distance from the edge 11c of the top surface 11 is D2) (see FIG. 2). Moreover, one end 22a, 23a being connected to the first slit 21 means that one end 22a, 23a of the second slit 22, 23 is formed continuously to both ends 21b, 21c of the first slit 21, respectively.

In addition, the other ends 22b and 23b are located on the other side (the front side 13 of the packaging bag 10) away from the convex top V of the first slit 21 in the second direction (Y direction). ) from the edge 11c of the top surface 11 located on the other side (the front 13 side of the packaging bag 10) to the other ends 22b, 23b of the second slits 22, 23 along the second direction (Y direction). , is shorter than the distance D2 from the edge 11c of the top surface 11 to the convex top V of the first slit 21 (see FIG. 2).

In the sheet packaging body 100, in the second direction (Y direction), the width W2 of the region where the first slit 21 exists is set to 1% or more and 25% or less with respect to the width W1 of the top surface 11 of the packaging bag 10. It is preferably 3% or more and 20% or less, more preferably 5% or more and 15% or less (see FIG. 2). In addition, in the second direction (Y direction), the width W3 of the area where the second slits 22 and 23 curve or extend is set to 5% or more and 35% or less of the width W1 of the top surface 11 of the packaging bag 10. It is preferably 10% or more and 30% or less, more preferably 15% or more and 25% or less (see FIG. 2).

Also, with respect to the distance D2 from the edge 11c of the top surface 11 to the convex top V of the first slit 21, second slits 22, 23 extending from the edge 11c of the top surface 11 in the second direction (Y direction) The distance D3 to the other ends 22b and 23b can be 60% or more and 95% or less, preferably 75% or more and 95% or less, and more preferably 80% or more and 90% or less.

The curved second slits 22 and 23 may have any shape, but are preferably arcuate. Here, the term "arc-shaped" indicates that the slit is curved to draw part of a circle. In this embodiment, the arc-shaped second slits 22 and 23 are formed in a substantially semicircular shape (arcuous degree θ=about 180°) (see FIG. 4). Note that the arc degree θ of the second arc-shaped slits 22 and 23 is not limited to this angle, and can be from 90° to 270°, preferably from 120° to 240°, more preferably from 150° to 210°. ° or less.

Further, the second slits 22 and 23 (perforation M2) forming part of the outlet 20 are configured by alternately arranging cuts C2 and ties T2 (see FIG. 3). Note that the tie T2 is an uncut portion between two adjacent cuts C2. In this embodiment, the curved second slits 22 and 23 are composed of two arc-shaped cuts C2, and the two cuts C2 are connected by one tie T2 (see FIG. 3).

In this embodiment, as described above, the outlet 20 formed in the top surface 11 of the packaging bag 10 is connected from one side (back side 14 side of the packaging bag 10) to the other side (packaging bag 10 side) in the second direction (Y direction). By having the first slit 21 extending in the first direction (X direction) so as to be convex on the front surface 13 side of the bag 10, when opening the outlet 20, the outlet 20 (opening OP) is covered. A part of the top surface 11 (a second flap F2 to be described later) tends to be folded upward (or easily bent) near the first slit 21. As a result, in this embodiment, the ejection port 20 can be easily opened with a fingertip, and the sheet S can be taken out from inside the packaging bag 10 (the first sheet (or first set of sheets S) accommodated in the packaging bag 10). (see Figures 6 to 8).

In this embodiment, the outlet 20 formed in the top surface 11 of the packaging bag 10 is curved further away from the first slit 21 in the first direction (X direction) in the second direction (Y direction). The top surface 11 that covered the outlet 20 (opening OP) has second slits 22 and 23 extending from one side (the back side 14 of the packaging bag 10) to the other side (the front side 13 of the packaging bag 10). A part (first flap F1 to be described later) is likely to be rolled upward (or easily bent) near the second slits 22 and 23. As a result, in this embodiment, when the sheet S is pulled out from the outlet 20, the opening width of the outlet 20 (opening OP) is expanded in the vicinity of both the first slit 21 and the second slits 22 and 23, and The sheet S can be taken out smoothly from the sheet 20 (see FIGS. 6 to 8).

In this embodiment, the curved second slits 22 and 23 are provided at both ends 21b and 21c of the first slit 21, so that when opening (or unsealing) the outlet 20, the curved second slit It becomes easier for fingers to hang onto both ends E1 and E2 in the first direction (X direction) of the outlet 20 corresponding to the openings 22 and 23. Therefore, the outlet 20 can be opened (or unsealed) using both ends E1 and E2 of the outlet 20 as a trigger. Therefore, in this embodiment, opening (or unsealing) the outlet is easy.

In this embodiment, corresponding to the curved second slits 22 and 23, both ends E1 and E2 of the outlet 20 in the first direction (X direction) are located outside the outlet 20 in the first direction (X direction) ( Since it is curved toward the side surfaces 15 and 16 of the packaging bag 10, it is possible to reduce friction between both ends E1 and E2 of the outlet 20 and the sheet S to be pulled out. Thereby, when drawing out the sheet S, it is possible to prevent the sheet S from getting caught on the ends E1 and E2 of the outlet 20 or from being torn. In this embodiment, also from this point of view, the sheet S can be smoothly taken out from the takeout port 20 (see FIGS. 6 to 8).

In this embodiment, when the sheet S is pulled out from the take-out port 20, a portion of the top surface 11 is (The first flap F1 and the second flap F2, which will be described later) can be bent (or deformed) in the vicinity of each slit 21, 22, and 23. As a result, in this embodiment, the holding force of the sheet S at the outlet 20 is maintained, and it is possible to prevent the sheet S from falling into the packaging bag 10 during use (hereinafter referred to as falling of the sheet S) (Fig. 6 to Figure 8).

In this embodiment, when the sheet S is pulled out from the outlet 20, a portion of the top surface 11 is bent (or deformed) near the first slit 21 and the second slits 22 and 23 as described above. Therefore, the frictional force (or resistance force) applied to the outlet 20 can be released (or dispersed) around the outlet 20. As a result, even if there are few remaining sheets S accommodated in the packaging bag 10 (even if the weight of the sheet packaging body 100 becomes lighter), the packaging bag 10 can be lifted up when the sheet S is pulled out from the outlet 20. (hereinafter referred to as lifting of the packaging bag 10) can be prevented (see FIGS. 6 to 8).

In this embodiment, as described above, a portion of the top surface 11 is bent (or deformed) in the vicinity of the first slit 21 and the second slits 22 and 23, so that the sheets S pulled out from the outlet 20 are It is maintained in a well-balanced manner near the slits 21, 22, and 23. Thereby, the sheet S pulled out from the outlet 20 can be held in the outlet 20 in a state where the sheet S is raised above the outlet 20. That is, it is possible to prevent the seat S from being held in a collapsed or tilted state (see FIGS. 6 to 8).

In this embodiment, since the outlet 20 is configured with the first slit 21 and the second slits 22 and 23, the outlet 20 that opens on the top surface 11 is not left open. Therefore, in this embodiment, foreign matter such as dirt and dust is difficult to enter into the packaging bag 10 from the outlet 20 (see FIGS. 6 to 8).

In this embodiment, since the outlet 20 is constituted by the first slit 21 and the second slits 22, 23, each slit 21, 22, 23 can directly constitute the opening OP of the outlet 20. Therefore, in this embodiment, no broken pieces (cut ends, small pieces, fragments, etc. cut off from the packaging bag) are generated when the outlet 20 is opened (see FIGS. 1 to 8).

Further, in this embodiment, as described above, one ends 22a and 23a of the second slits 22 and 23 are connected to the first slit 21, and the other ends 22b and 23b are connected to the second slit from the convex top V of the first slit 21. By being located on the other side (the front 13 side of the packaging bag 10) away from the direction (Y direction), a part of the top surface 11 (the first flap F1 to be described later) can be enlarged near the second slits 22 and 23. It can be deflected (or deformed). As a result, when drawing out the sheet S from the outlet 20, the width of the opening of the outlet 20 increases in the vicinity of the second slits 22 and 23, allowing smooth extraction of the sheet S from the outlet 20 with high precision. This can be realized (see FIGS. 6 to 8).

In this embodiment, as described above, a portion of the top surface 11 is largely bent (or deformed) in the vicinity of the second slits 22 and 23, so that the holding force of the sheet S at the outlet 20 is further maintained. It is possible to prevent the sheet S from falling with high precision. In addition, the frictional force (or resistance force) applied to the outlet 20 can be further released (or scattered) around the outlet 20, so that the packaging bag 10 can be lifted even when the remaining sheet S stored in the packaging bag 10 is low. can be prevented with high accuracy (see Figures 6 to 8).

In this embodiment, as described above, a portion of the top surface 11 is largely bent (or deformed) in the vicinity of the second slits 22 and 23, so that the sheet S pulled out from the outlet 20 is separated from the first slit 21. The second slits 22 and 23 can further maintain balance. Thereby, it is possible to hold the sheet S pulled out from the outlet 20 in the outlet 20 in a state where the sheet S is raised above the outlet 20 with high precision (see FIGS. 6 to 8). .

Further, in this embodiment, by making the second slits 22 and 23 arcuate, the edges of both ends E1 and E2 of the outlet 20 in the first direction (X direction) can be made into an arcuate shape. can. This further reduces the friction of the sheet S against both ends E1 and E2 of the ejection port 20, and prevents the sheet S from getting caught on the ends of the ejection port 20 or being torn when the sheet S is pulled out. It can be prevented with high precision.

From a different perspective, the sheet packaging body 100 of this embodiment has a first slit surrounded by a first slit 21, second slits 22 and 23, and a first base end (base end B1) extending in the first direction (X direction). 1 flap F1 (Fig. 5, Fig. 6). The first flap F1 has a linear base end B1 (first base end) connected to the top surface 11 on the other side (the front 13 side of the packaging bag 10) in the second direction (Y direction), and It has a concave tip A1 (recess R) that becomes a free end on the inside (see FIG. 5). Note that the base end B1 is a portion indicated by a broken line in FIG.

Here, the flap is a part of the packaging bag 10 that is formed on the top surface 11 of the packaging bag 10 and is bent (or deformed) by the frictional force (or resistance force) when the sheet S is pulled out from the outlet 20. configured. Moreover, the base end indicates the end of the flap that is the starting point from which the flap bends (or deforms).

Further, the sheet package 100 has a second flap F2 surrounded by the first slit 21 and a second base end (base end B2) extending in the first direction (X direction). The second flap F2 has a linear base end B2 (second base end) connected to the top surface 11 on one side (back side 14 side of the packaging bag 10) in the second direction (Y direction), and a straight base end B2 (second base end) connected to the top surface 11 in the second direction (Y direction). It has a convex tip A2 (convex part P) that becomes a free end on the inside (see FIG. 5). Note that the base end B2 is a portion indicated by a broken line in FIG.

The sheet package 100 further has a third flap F3 surrounded by the second slits 22 and 23 and a third base end (base end B3) extending in the second direction (Y direction). The third flap F3 is
A straight base end B3 (third base end) is formed at both ends 21b, 21c of the first slit 21 and extends from one end 22a, 23a of the second slit 22, 23 along the other end 22b, 23b. It has an arcuate edge E3 that becomes a free end inside the outlet 20. Note that the base end B3 is a portion indicated by a broken line in FIG.

In this embodiment, as described above, by providing the first slit 21 and the second slits 22, 23 on the top surface 11 of the packaging bag 10, the first slit 21, the second slits 22, 23 and the first A first flap F1 surrounded by the base end (base end B1) can be configured. In such a first flap F1, the vicinity of the first slit 21 is recessed inside the outlet 20 (forming a recessed part R), and the vicinity of the second slits 22 and 23 is easily bent (or easily deformed). becomes. As a result, in this embodiment, the sheet S is held in the outlet 20 without being hindered from smoothly drawing out the sheet S, and furthermore, the falling of the sheet S and the lifting of the packaging bag 10 are suppressed (FIGS. 5 to 5). 8).

In this embodiment, the first flap F1 is surrounded by the first slit 21, the second slits 22 and 23, and the first base end (base end B1), so that the outlet 20 can be covered by the first flap F1. can. Therefore, in this embodiment, the outlet 20 is not left open, and it is possible to prevent foreign matter such as dirt and dust from entering the packaging bag 10 from the outlet 20 (see FIGS. 5 to 8).

In this embodiment, the first flap F1 is surrounded by the first slit 21, the second slits 22 and 23, and the first base end (base end B1), so that the first flap F1 is wrapped through the base end B1. It is provided at the outlet 20 while being connected to the top surface 11 of the bag 10. Therefore, in this embodiment, it is possible to prevent the generation of broken pieces when opening the outlet 20 (see FIGS. 1 to 8).

Further, in this embodiment, as described above, by providing the first slit 21 and the second slits 22 and 23 on the top surface 11 of the packaging bag 10, the first slit 21 and the first direction (X direction) A second flap F2 surrounded by a second base end (base end B2) extending from the first flap F1 can be configured together with the first flap F1 (see FIG. 5).

Such a second flap F2 has a convex portion near the first slit 21 inside the outlet 20 (forming a convex portion P), and is arranged in line with the first flap F1 in the second direction (Y direction). Ru. Thereby, the second flap F2 can hold the sheet S pulled out from the outlet 20 in a well-balanced manner with the first flap F1. Therefore, in this embodiment, it is possible to hold the sheet S pulled out from the outlet 20 at the outlet 20 in a state where the sheet S is raised above the outlet 20 with high precision (see FIGS. (See Figure 8).

In this embodiment, the second flap F2 is surrounded by the first slit 21 and the second base end (base end B2), so that the outlet 20 can be covered with the second flap F2 together with the first flap F1. Therefore, in this embodiment as well, the outlet 20 is not left open, and it is possible to prevent foreign substances such as dirt and dust from entering the packaging bag 10 from the outlet 20 with high precision (see FIGS. 5 to 8). .

In this embodiment, the second flap F2 is surrounded by the first slit 21 and the second base end (base end B2), so that the second flap F2 is attached to the top surface 11 of the packaging bag 10 via the base end B2. It is provided in the outlet 20 in a connected state. Therefore, in this embodiment as well, it is possible to prevent the generation of broken pieces when opening the outlet 20 (see FIGS. 1 to 8).

Further, in this embodiment, as described above, by providing the first slit 21 and the second slits 22, 23 on the top surface 11 of the packaging bag 10, the second slits 22, 23 and the second direction (Y (see FIG. 5).

Such third flap F3 constitutes both ends of the first flap F1 in the first direction (X direction), and constitutes a portion that is easily bent (or easily deformed) near the second slits 22 and 23. Can be done. As a result, in this embodiment, the sheet S is held in the outlet 20 without being obstructed from pulling out the sheet S, and furthermore, the falling of the sheet S and the lifting of the packaging bag 10 are suppressed with higher precision (Fig. 5 to Figure 8).

Further, the third flap F3 can hold the sheet S pulled out from the outlet 20 in a well-balanced manner with the second flap F2 together with the first flap F1. Therefore, in this embodiment, it is possible to hold the sheet S pulled out from the outlet 20 in a state where the sheet S is raised above the outlet 20 with higher precision (see FIG. ~See Figure 8).

Further, in this embodiment, the third flap F3 is surrounded by the second slits 22 and 23 and the third base end (base end B3), so that the extraction port 20 is surrounded by the second flap F1 and the second flap F2. 3 flap F3 can be covered. Therefore, in this embodiment as well, the outlet 20 is not left open, and it is possible to prevent foreign substances such as dirt and dust from entering the packaging bag 10 from the outlet 20 with high precision (see FIGS. 5 to 8). .

Furthermore, in the present embodiment, the third flap F3 is surrounded by the second slits 22 and 23 and the third base end (base end B3), so that the third flap F3 is inserted into the packaging bag 10 through the first flap F1. It is provided at the outlet 20 in a state where it is connected to the top surface 11 of the. Therefore, in this embodiment as well, it is possible to prevent the generation of broken pieces when opening the outlet 20 (see FIGS. 1 to 8).

FIG. 9 is a diagram showing an outlet in the sheet package according to the second embodiment. FIG. 10 is a diagram showing the outlet after opening in the sheet package according to the second embodiment. FIG. 12 is a diagram showing how the sheet package according to the second embodiment is used. In addition, in the second embodiment, parts common to the first embodiment are given the same reference numerals as in FIGS. 3 and 6, and the description thereof will be omitted.

In the sheet package 100 according to the second embodiment, at least the convex top portion V of the first slit 21 has a curved shape (see FIG. 9). Here, the phrase "at least the convex top V is curved" means that the portion of the first slit 21 other than the convex top V may be curved or straight. In this embodiment, the entire first slit 21 including the convex top V is formed in a curved shape (see FIG. 9).

In this embodiment, by making the convex apex V of the first slit 21 curved in this way, the apex V of the first slit 21 is less likely to provide resistance to the sheet S being pulled out from the ejection port 20. The top portion V of the first slit 21 is likely to be caught on the sheet S held at the outlet 20. Therefore, according to the present embodiment, it is possible to prevent the sheet S from falling and the packaging bag 10 from rising while maintaining smooth removal of the sheet S from the outlet 20.

From a different perspective, the sheet package 100 according to the second embodiment is surrounded by the first slit 21, the second slits 22, 23, and the first base end (base end B1) extending in the first direction (X direction). It has a first flap F1. The first flap F1 has a linear base end B1 (first base end) connected to the top surface 11 on the other side (the front 13 side of the packaging bag 10) in the second direction (Y direction), and It has a concave tip A1 (recess R) that becomes a free end on the inside.

Further, the sheet package 100 according to the second embodiment has a second flap F2 surrounded by the first slit 21 and a second base end (base end B2) extending in the first direction (X direction). The second flap F2 has a linear base end B2 (second base end) connected to the top surface 11 on one side (back side 14 side of the packaging bag 10) in the second direction (Y direction), and a straight base end B2 (second base end) connected to the top surface 11 in the second direction (Y direction). It has a convex tip A2 (convex part P) that becomes a free end on the inside.

The sheet package 100 according to the second embodiment further includes a third flap F3 surrounded by the second slits 22 and 23 and a third base end (base end B3) extending in the second direction (Y direction). The third flap F3 is formed at both ends 21b and 21c of the first slit 21, and has a linear base end B3 (a third (base end) and an arcuate edge E3 that becomes a free end inside the outlet 20.

In addition, in the sheet package 100 according to the second embodiment, the tip A1 (recessed portion R) of the first flap F1 has a curved shape corresponding to the first slit 21 whose convex top portion V has a curved shape. Further, the tip A2 (convex portion P) of the second flap F2 is also curved.

As a result, in the second embodiment, the top portion V of the first slit 21 is less likely to provide resistance to the sheet S pulled out from the outlet 20, and the first slit 21 The top V becomes easily caught. Therefore, according to the second embodiment, it is possible to prevent the sheet S from falling and the packaging bag 10 from lifting up with high precision while maintaining smooth removal of the sheet S from the outlet 20.

Hereinafter, the present invention will be further described in detail using Examples. Evaluation of Examples and Comparative Examples was performed by the following tests.

[Sheet package (test specimen)]
As a test specimen, a sheet package 100 in which a sheet laminate SL in which a plurality of sheets S were stacked was housed in a packaging bag 10 was prepared (see FIGS. 1, 11, and 12). The sheet laminate SL is made of tissue paper (basis weight: 10.7 g/m ² , paper thickness: 110 μm, number of plies: 2 plies, Number of sets: 150 sets (300 sheets), dimensions: height of about 40 mm, width of about 178 mm, and length of about 100 mm) were used. Further, the sheet laminate SL was housed in the packaging bag 10 so that the stacking direction (SD direction) was in the height direction (Z direction) of the sheet package 100 (see FIGS. 1, 11, and 12). Further, as the material of the packaging bag 10, polyethylene (PE) with a thickness of 50 μm was used. The packaging form of the packaging bag 10 was such that both sides 15 and 16 of the sheet packaging body 100 were sealed with caramel packaging (sealed portions 30 and 40 were formed). The dimensions of the packaging bag 10 were a length L1 of about 180 mm in the first direction (X direction), a width W1 of about 100 mm in the depth direction (Y direction), and a height of about 40 mm in the height direction (Z direction). Further, an outlet 20 extending in the first direction (X direction) was formed in the top surface 11 of the packaging bag 10 by perforations.

[Takeout resistance value]
Place the above-mentioned test specimen (sheet package 100) on a flat mounting surface, pull out the first set of tissue paper (sheet S) by about 40 mm from the outlet 20 (opening OP) of the packaging bag 10, and remove the pulled sheet. The upper end of S (the central part in the first direction (X direction) of the sheet packaging body 100) is held between eyeball clips (manufactured by KOKUYO Co., Ltd., "Cree-17"), and one side of the handle portion of this eyeball clip is held. When the hook of a push-pull gauge (IMADA DEGTAL FORCE GAUGE Z2-20, manufactured by IMADA Co., Ltd.) is hooked into the hole of The extraction resistance value (unit: N) was measured. When the extraction resistance value was 1N or less, it was evaluated as good (the sheet S was easy to take out), and when it exceeded 1N, it was evaluated as not good (the sheet S was difficult to take out).

[Depression]
When the sheets S from the first set to the last set were continuously pulled out from the sheet stack SL through the outlet 20 of the packaging bag 10, the next sheet S after the pulled out sheet S fell into the packaging bag 10. The number of times (drops) was measured. For the drop, the average value is calculated from the results of 5 tests, and if the average value is 5.0 or less, it is evaluated as good (hard to drop), and if the average value exceeds 5.0, it is evaluated as good (hard to drop). It was rated as not good (easily depressed).

[Lifting]
When the sheets S were successively pulled out from the first set to the last set from the sheet stack SL through the outlet 20 of the sheet package 100, the number of the first set of sheets S from which the packaging bag 10 was lifted was measured. If lifting did not occur, it was evaluated as good 〇 (hard to lift), and if lifting occurred, it was evaluated as poor × (easy to lift).

[Seat independence]
The sheet independence was evaluated when the 11th to 20th sets (10 sets in total) of sheets S were pulled out one by one from the sheet stack SL through the outlet 20 of the sheet package 100. Sheet independence was evaluated by measuring the number of sets in which the next sheet S after the pulled sheet S stood up substantially perpendicularly to the top surface 11 of the packaging bag 10, and evaluated based on the following criteria. If the seat independence was ○, it was evaluated as good (the seat is easily held in an upright position), and if it was △ or ×, it was evaluated as poor (the seat is likely to be held in a collapsed or tilted position). .
〇: 8 or more groups △: 7 to 3 groups ×: 2 or less groups

[Occurrence of fragments]
When the outlet 20 was opened, it was confirmed that broken pieces (cut ends, small pieces, fragments, etc. cut off from the packaging bag) were generated. Regarding the occurrence of broken pieces, if the broken pieces were not separated from the packaging bag 10, it was evaluated as good (no broken pieces were generated), and when the broken pieces were separated, it was rated as poor (× (broken pieces were generated)).

Examples and comparative examples will be described below.

[Example 1]
In the sheet packaging body 100, the top surface 11 of the packaging bag 10 is coated from one side (the back surface 14 side of the packaging bag 10) to the other side (the packaging bag 10 side) in the second direction (Y direction) intersecting the first direction (X direction). The first slit 21 (perforation M1) extends in the first direction (X direction) so as to be convex in the front 13 side of 10, and the first slit 21 is continuous with both ends 21b and 21c of the first slit 21, respectively. 21 in the first direction (X direction) and extends from one side (the back side 14 of the packaging bag 10) to the other side (the front side 13 of the packaging bag 10) in the second direction (Y direction). An outlet 20 having second slits 22 and 23 (perforation M2) was provided. The convex top V of the first slit 21 was formed linearly along the first direction (X direction) (see FIGS. 1 to 5). The produced test specimens were evaluated for take-out resistance, depression, lifting, sheet independence, and occurrence of broken pieces. The results are shown in Table 1.

[Example 2]
A test specimen was produced and evaluated in the same manner as in Example 1, except that the convex top V of the first slit 21 was curved (see FIGS. 9 and 10). The results are shown in Table 1.

[Comparative example 1]
Evaluation was performed in the same manner as in Example 1, except that the outlet 20 was formed only with a linear slit (perforation M3) (see FIG. 11). The results are shown in Table 1.

[Comparative example 2]
Evaluation was performed in the same manner as in Example 1, except that the outlet 20 was formed only with a substantially elliptical slit (perforation M4) (see FIG. 12). The results are shown in Table 1.

From Table 1, the sheet packaging body 100 in which the outlet 20 formed in the top surface 11 of the packaging bag 10 has the first slit 21 (perforation M1) and the second slit (perforation M2) , lifting, sheet self-reliance, and generation of broken pieces were all good (Examples 1 and 2).

On the other hand, the sheet packaging body 100 in which the ejection port 20 is formed with a linear slit (perforation M3) or a substantially elliptical slit (perforation M4) has an ejection resistance value from the first set to the fifth sheet. exceeded 1N (not good). In addition, the average value of decline exceeded 5.0 (not good). Furthermore, at least one of lifting, sheet self-supporting properties, and generation of broken pieces was not good (Comparative Examples 1 and 2).

From these results, it was found that the extraction port is continuous with the first slit extending in the first direction so as to be convex from one side to the other side in the second direction intersecting the first direction, and on both ends of the first slit. It has been found that a sheet packaging body having a second slit extending from one side in the second direction to the other side in the second direction so as to curve away from the first slit in the first direction is excellent in taking out the sheet.

Although the embodiments of the present invention have been described above, the present invention is not limited to specific embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. .

100 Sheet packaging S Sheet (hygienic thin paper)
SL Sheet laminate 10 Packaging bag 11 Top surface 11a Center in longitudinal direction 11b Center in transverse direction 11c Edge 12 Bottom surface 13 Front surface 14 Back surface 15 Side surface 16 Side surface 20 Output opening OP opening 21 First slit 21a Base 21b End 21c End Part C1 Cut T1 Tie G1 End G2 End V Top 22 Second slit 22a One end 22b Other end 22c Base C2 Cut T2 Tie 23 Second slit 23a One end 23b Other end 23c Base C2 Cut T2 Tie F1 First flap B1 Base end A1 Tip P Convex portion F2 Second flap B2 Base end A2 Tip R Recess F3 Third flap B3 Base end E3 Edge 30 Seal portion 40 Seal portion

Claims (6)

a packaging bag that accommodates a plurality of stacked sheets;
and an outlet formed on the top surface of the packaging bag and extending in the first direction,
The outlet is
a first slit extending in the first direction so as to be convex from one side to the other side in a second direction intersecting the first direction;
a second slit that is continuous with both ends of the first slit and extends from the one side in the second direction to the other side so as to curve away from the first slit in the first direction; ,
The second slit has one end connected to the first slit, and the other end located on the other side away from the convex top of the first slit in the second direction. The sheet package according to claim 1, wherein the second slit has an arcuate shape. The sheet package according to claim 1 or 2, wherein at least the convex top of the first slit is curved. A first flap surrounded by the first slit, the second slit, and a first base end extending in the first direction from the other end of one second slit to the other end of the other second slit. The sheet package according to any one of claims 1 to 3, comprising: Claims 1 to 4 have a second flap surrounded by the first slit and a second base end extending in the first direction from the one end of one of the second slits to the one end of the other second slit. The sheet package according to any one of the above. Any one of claims 1 to 5, comprising a pair of third flaps surrounded by the second slit and a third base end extending in the second direction from the one end to the other end of the second slit. Sheet packaging as described.

Images