JP2020138749A - Sheet package - Google Patents

Abstract

To provide a sheet package which has an excellent feature for taking out sheets.SOLUTION: A sheet package has: laminated sheets; a packaging bag which stores the sheets; and a take-out port which is formed on an upper surface of the packaging bag and from which the sheets are pulled out. The take-out port is formed by a slit extending in a first direction and at least a part of the slit is a wavy line shape.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sheet package.

Sanitary tissue paper such as tissue paper, which is housed in a carton (cardboard box), is widely used. However, carton-type sanitary tissue paper is bulky when carried and stored, and in recent years, sheets such as sanitary tissue paper are housed in flexible film packaging bags from the viewpoint of disposal after use, environmental load, cost, etc. Demand for sheet packaging is increasing. Some of such sheet packages have slits (perforations or the like) formed in the film packaging bag for taking out sanitary paper (see, for example, Patent Documents 1 and 2).

JP-A-2018-177364 Japanese Unexamined Patent Publication No. 2016-188092

However, in a sheet package in which the outlet is formed by a slit, the outlet is difficult to open and the sheet is difficult to be taken out from the packaging bag. In addition, when the sheet is taken out from the packaging bag, the sheet may be clogged at the outlet or the sheet may be torn. Further, at the outlet formed by the slit in the film packaging bag, the holding force of the sheet may decrease during use, and the sheet may fall into the packaging bag. Further, since the film wrapping bag is lighter than the carton, if the remaining sheets are reduced during use, the film wrapping bag may be lifted up when the sheet is taken out, and the sheet may not be pulled out. As described above, the conventional sheet package has various problems in the ease of taking out the sheet.

An object of the present invention is to provide a sheet package having excellent sheet take-out property.

The first aspect according to the present invention has a plurality of laminated sheets, a packaging bag containing the sheets, and an outlet formed on the upper surface of the packaging bag and from which the sheets are pulled out. The outlet is a sheet package formed by slits extending in the first direction, and at least a part of the slits has a wavy line shape.

In the present specification, the first direction indicates a direction along a predetermined one direction on the upper surface of the packaging bag. Further, at least a part of the slit means all or a part of the slit. Further, the wavy line shape indicates a wavy linear shape.

In the first aspect, when the slit formed on the upper surface of the packaging bag is opened, a wavy outlet corresponding to the slit is formed in the first direction on the upper surface of the packaging bag. In such a configuration, the wavy portion of the outlet is easily turned over, so that the outlet can be easily opened with a fingertip. Therefore, in the first aspect, the fingertip is easily inserted into the take-out port, and the sheet can be easily taken out even when the first sheet of the sheet housed in the packaging bag is taken out.

Further, in the first aspect, since the portion having the wavy line shape of the outlet is easily turned over as described above, the outlet is easy to open. Therefore, in the first aspect, when the sheet in the packaging bag is taken out (or pulled out), the sheet is less likely to be clogged in the take-out port. Further, since the sheet is less likely to be clogged in the outlet, the friction between the outlet and the sheet is alleviated, so that the sheet is less likely to be torn when the sheet is taken out from the outlet.

Further, in the first aspect, the wavy portion of the outlet serves as a cushioning portion, and the outlet can be deformed according to the weight of the sheet held in the outlet during use. Thereby, in the first aspect, the holding force of the sheet at the outlet is maintained even during use, and the sheet is prevented from falling into the packaging bag during use (hereinafter, may be referred to as a drop or a drop of the sheet). Can be done.

Further, in the first aspect, as described above, the sheet is less likely to be clogged with the outlet (the friction between the outlet and the sheet can be alleviated), so that it is possible to reduce the wear of the outlet during use. it can. From such a viewpoint as well, it is possible to suppress a decrease in the holding force of the sheet at the outlet and prevent the sheet from falling.

Further, in the first aspect, the frictional force (or resistance force) applied to the outlet when the sheet is taken out can be released (or dispersed) to the wavy line-shaped portion (buffer portion) of the outlet. Thereby, in the first aspect, even if the remaining sheet is reduced during use (that is, the weight of the sheet package is reduced), the entire packaging bag is lifted when the sheet is taken out (hereinafter, lifted or lifted). It is possible to prevent the packaging bag from being lifted.

A second aspect according to the present invention is a sheet package in which the wavy line shape has peaks and valleys alternately arranged in the first direction. In the present specification, the relationship between the mountain portion and the valley portion is such that when the convex portion that is convex on one side in the wavy line forming the wavy line shape is the mountain portion, it is convex on the other side that faces the one side. Shows the relationship in which the convex portions are relatively valley portions. Further, the fact that the peaks and valleys are arranged alternately means that the plurality of peaks and the plurality of valleys forming the wavy line shape are arranged every other along the first direction.

In the second aspect, the wavy peaks and valleys are alternately arranged in the first direction in this way, so that the stress applied to the outlet and its surroundings can be applied to the portion having the wavy shape of the outlet (buffer). It can be released (or dispersed) throughout. Thereby, in the second aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a well-balanced manner while facilitating the taking out of the sheet.

A third aspect according to the present invention is a sheet package in which the part having the wavy line shape is the central portion of the outlet. In the present specification, the central portion of the outlet means a portion that occupies about one-third of the entire slit extending in the first direction at substantially the center of the slit. Further, the central portion of the outlet is a portion where stress is concentrated when the sheet is taken out from the outlet.

In the third aspect, since the central portion of the outlet has a wavy shape of the slit, a portion (buffer portion) having a wavy shape of the outlet can be provided in the portion where stress is concentrated in the outlet. As a result, the stress concentrated on a part of the outlet can be efficiently released (or dispersed) to the entire wavy portion (buffer portion) of the outlet.

A fourth aspect according to the present invention is a sheet package in which the part having the wavy line shape is at least one end of the outlet. In the present specification, at least one end of the outlet means both ends of the outlet or one end of the outlet. Further, both ends of the outlet have a large frictional force (or resistance) applied when the sheet is taken out from the outlet, and are easily torn.

In the fourth aspect, at least one end of the outlet has a wavy shape, so that a portion (buffer portion) having a wavy shape is provided in the portion of the outlet where the frictional force (or resistance) of the sheet is large. be able to. As a result, the frictional force (or resistance force) applied to a part of the outlet can be efficiently released (or dispersed) to the entire wavy portion (buffer portion) of the outlet, so that it can be removed at the time of use. It is possible to prevent the end of the outlet from being torn.

A fifth aspect according to the present invention is a sheet package in which the wavy wave height is 1 to 20% of the width of the upper surface in the second direction intersecting with the first direction. In the present specification, the width in the second direction intersecting the first direction of the upper surface indicates the width of the upper surface of the packaging bag along the direction intersecting the direction in which the slit extends.

Further, the wavy wave height indicates the distance between the top of the wavy peak and the top (bottom) of the valley along the direction in which the slit extends and intersects. Here, the top of the mountain portion indicates the apex of the mountain portion and its vicinity, and the top (bottom) of the valley portion indicates the apex (valley bottom) of the valley portion and its vicinity.

In the fifth aspect, since the wavy shape of the slit has a wave height in such a range, the stress applied to the outlet and its surroundings is efficiently applied to the entire portion (buffer portion) having the wavy shape of the outlet. Can be released (or dispersed) to. Thereby, in the fifth aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a more balanced manner while facilitating the taking out of the sheet.

In the sixth aspect according to the present invention, the wavy line shape has two or more wave heights, and the portion having the largest wave height among the two or more wave heights is arranged at the central portion of the outlet. It is a sheet package. In the present specification, having two or more wave heights means that the wavy lines forming the wavy line shape have at least two kinds of wave heights.

In the sixth aspect, the central portion of the outlet has a wavy line shape having the largest wave height among the two or more wave heights, so that the stress concentrated on a part of the outlet is applied to the wavy line shape of the outlet. It can be released (or dispersed) more efficiently with respect to the entire portion (buffer portion) having the stress. Thereby, in the sixth aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a more balanced manner while facilitating the taking out of the sheet.

A seventh aspect according to the present invention is a sheet package in which the largest wave height is 20 to 40% with respect to the width of the upper surface in the second direction intersecting with the first direction. In the seventh aspect, by setting the largest wave height of the two or more wave heights of the wavy line shape of the slit in such a range, the stress concentrated on a part of the outlet is applied to the portion having the wavy line shape of the outlet. It can be released (or dispersed) more efficiently over the entire (buffer). Thereby, in the seventh aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a more balanced manner while facilitating the taking out of the sheet.

An eighth aspect according to the present invention is a sheet package in which the wavelength of the wavy line shape is 10 to 40% of the length of the outlet in the first direction. In the present specification, the length of the outlet along the first direction means the length of the outlet along the direction in which the slit extends. Further, the wavy wavelength indicates the distance between the tops of adjacent peaks of the wavy shape along the direction in which the slit extends, or the distance between the tops of adjacent valleys.

In the eighth aspect, by setting the wavelength of the wavy shape of the outlet in such a range, the stress concentrated on a part of the outlet is applied to the entire portion (buffer portion) having the wavy shape of the outlet. It can be released (or dispersed) more efficiently. Thereby, in the eighth aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a more balanced manner while facilitating the taking out of the sheet.

A ninth aspect of the present invention is a sheet package in which the wavy wavelength is 5 to 45% of the length of the upper surface in the first direction. In the present specification, the length of the upper surface in the first direction means the length of the upper surface of the packaging bag along the direction intersecting with the packaging bag along the direction in which the slit extends.

In the ninth aspect, by setting the wavelength of the wavy line shape at the outlet to such a range, the stress concentrated on a part of the outlet is applied to the entire portion (buffer portion) having the wavy shape of the outlet. It can be released (or dispersed) more efficiently. Thereby, in the ninth aspect, it is possible to prevent the sheet from falling and the packaging bag from being lifted in a more balanced manner while facilitating the taking out of the sheet.

According to one aspect of the present invention, it is possible to provide a sheet package having excellent sheet take-out property.

It is a figure which shows the sheet package which concerns on embodiment (1st Embodiment) of this invention. It is a figure which looked at the sheet package body which concerns on 1st Embodiment from above in the height direction. It is the figure which enlarged the outlet in the sheet package which concerns on 1st Embodiment. It is a figure which shows the use state of the sheet package which concerns on 1st Embodiment. It is an enlarged view of the outlet in the sheet package body which concerns on the modification of 1st Embodiment. It is the figure which enlarged the outlet in the sheet package body which concerns on 2nd Embodiment. It is the figure which enlarged the outlet in the sheet package body which concerns on the modification of 2nd Embodiment. It is a figure which shows the conventional sheet package body. It is the figure which enlarged the take-out port in the conventional sheet package.

Embodiments of the present invention will be described in detail with reference to the drawings. The common parts in the drawings may be designated by the same reference numerals and description thereof may be omitted. Further, in the description shown below, the scale of each member in each drawing may be different from the actual scale for easy understanding.

FIG. 1 is a diagram showing a sheet package according to the first embodiment of the embodiment of the present invention. FIG. 2 is a view of the sheet package according to the first embodiment as viewed from above in the height direction. FIG. 3 is an enlarged view of the outlet in the sheet package according to the first embodiment. FIG. 4 is a diagram showing a usage state of the sheet package according to the first embodiment. In the sheet package 100 shown in FIGS. 1 to 4, the longitudinal direction (horizontal direction) is the X direction, the depth direction (front-back direction) is the Y direction, and the height direction (vertical direction) is the Z direction.

As shown in FIG. 1, the sheet package 100 according to the first embodiment has a sheet ST, a packaging bag 10, and an outlet 20. The sheet package 100 is an example of the sheet package according to the present invention. Further, the sheet ST, the packaging bag 10, and the outlet 20 are examples of each of the sheet, the packaging bag, and the outlet that constitute the sheet package according to the present invention.

As shown in FIG. 1, the sheet ST is housed in the packaging bag 10 as a laminated body SL in which a plurality of sheet STs are laminated. The laminated body SL of the sheet ST is housed in the packaging bag 10 so that the stacking direction (SD direction) of the sheet ST is the height direction (Z direction). In the sheet laminate SL, the sheets ST can be pulled out one by one through the outlet 20 (OP) formed in the packaging bag 10 (see FIG. 4).

From the viewpoint of pulling out one set of sheet ST, the laminated body SL of the sheet ST is preferably one in which each sheet ST is alternately laminated in a folded state (so-called pop-up type sheet laminated body SL). Further, the form of the laminated body SL of the sheet ST is not limited to the one that can be pulled out in a pop-up manner, and may be one in which a plurality of sheet STs are simply laminated or one in which each sheet ST is laminated in a folded state.

Further, the dimensions of the laminated body SL of the sheet ST are such that the length of the sheet package 100 in the longitudinal direction (X direction) is about 80 to 250 mm, and the depth orthogonal to the longitudinal direction (X direction) of the sheet package 100 when viewed from above. The length in the direction (Y direction) can be about 50 to 130 mm, and the height in the height direction (Z direction) can be about 10 to 90 mm. Such a laminate of tissue paper can be produced, for example, by a rotary type or a multi-stand type interfolder.

The use of the sheet ST is not particularly limited, and can be applied to, for example, sanitary tissue paper such as tissue paper, toilet paper, kitchen paper, and paper towel. These sanitary tissue papers also include hygienic tissue papers containing moisturizing ingredients (eg, lotion tissues, etc.). The use of the sanitary tissue paper constituting the sheet ST is not particularly limited, and any of industrial, household, and portable uses can be applied. Among these, the sheet wrapping body 100 of the present embodiment is preferably used for household tissue paper.

The number of plies of the sheet ST is not particularly limited, but may be 1 ply or more, preferably 1 ply (1 sheet stacking), and more preferably 2 plies (2 sheets stacking). The shape of the sheet ST is not particularly limited, but for example, it is preferable that the two-ply sheet has a rectangular contour shape in a folded state.

The material of the sheet ST is not particularly limited, but for example, a sheet such as paper, non-woven fabric, or cloth can be used, and a paper sheet is preferable. When the sheet ST is a paper sheet, a base paper containing pulp as a main raw material is used. As the pulp composition, a known composition in a paper sheet 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.

The pulp composition of the sheet ST (paper sheet) is not particularly limited. For example, softwood pulp such as NBKP (conifer kraft pulp) and NUKP (conifer unbleached pulp) and broadleaf pulp such as LBKP (hardwood kraft pulp) and LUKP (hardwood unbleached pulp) can be used in an arbitrary ratio. However, it is preferable that the pulp composition has a larger ratio of softwood pulp to broadleaf pulp. The ratio of softwood pulp to hardwood pulp is not limited, but is preferably 10:90 to 80:20. In addition, waste paper pulp may be used as the pulp contained in the pulp composition of sheet ST (paper sheet).

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 non-woven 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, and the paper thickness measured in the environment of JIS P 8111 (1998) can be adopted. For example, the paper thickness of the paper sheet constituting the sheet ST is preferably 50 μm or more and 500 μm or less, and more preferably 60 μm or more and 330 μm or less per 2 plies.

The paper thickness is measured by adjusting the humidity of the test piece sufficiently under the conditions of JIS P 8111 (1998), and then under the same conditions, dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Seisakusho). ) Is used to measure in a 2-ply state. Specifically, after confirming that there is no dust, dust, etc. between the plunger and the measuring table, the plunger is lowered onto the measuring table, and the memory of the dial thickness gauge is moved to adjust the zero point. Then, raise the plunger, place the sample on the test bench, and read the gauge when the plunger is slowly lowered. At this time, the plunger is only placed. The terminal of the plunger is made of metal so that a circular plane having a diameter of 10 mm hits the paper plane perpendicularly, and the load at the time of measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by performing the measurement 10 times.

Further, the paper sheet constituting the sheet ST may be embossed. Such embossing is not shown by a known contact embossing method, an edge embossing method, or the like, in which embossing (not shown) is pressed against both ends of a paper sheet and a plurality of paper sheets are laminated, or by a known pin embossing method. A paper sheet in which a pin is pierced into a paper sheet to form pin embossing on one surface of the paper sheet. A water-soluble adhesive (starch, etc.) is heated and melted by a known embossing method, and the laminated paper sheet is laminated. There are some that form embossing by adhering (not shown).

The packaging bag 10 constituting the sheet packaging body 100 is not particularly limited, and can be formed of, for example, a flexible film. Further, the packaging bag 10 is manufactured by caramel packaging. Specifically, both ends of the tubular flexible film are formed of sealed portions 30 and 40 that are folded and bonded (sealed) (see FIG. 1). The packaging form of the sheet packaging body 100 is not limited to such caramel packaging, and both ends or one end of the tubular flexible film are sealed in a gusset shape by a heat seal. (It may be sealed with so-called pillow packaging).

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

Among these flexible films, polyethylene, polypropylene, polyethylene terephthalate and the like are preferable from the viewpoints of being flexible, excellent in handleability, high sealing property when heat-sealed, and inexpensive. Further, polyethylene is preferable from the viewpoint of being odorless, excellent in water resistance and chemical resistance, and capable of mass production at low cost. As the polyethylene, high-density polyethylene, low-density polyethylene and the like can be used. Further, polypropylene is preferable from the viewpoints of being robust, easy to mold, good color development at the time of printing, and being able to impart gloss.

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

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, and 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 a packaging bag 10 in which the sheet ST is housed can be ensured. Further, by setting the thickness of the flexible film to 100 μm or less, the flexibility and lightness of the housing can be ensured, and the cost can be suppressed.

The material forming the packaging bag 10 is not limited to the resin material described above, and a paper material may be used. Further, a biodegradable material (biodegradable plastic, biodegradable paper, etc.) can be used as the material for forming the packaging bag 10.

In the present embodiment, the packaging bag 10 has an upper surface 11, a lower surface 12, a front surface 13, a back surface 14, a side surface 15, and a side surface 16, and the laminated body SL of the sheet ST is stored. In the sheet package 100, as shown in FIG. 1, the upper surface 11 and the lower 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 surface 15 and the side surface 15. The side surfaces 16 face each other in the left-right direction (X direction). The side surface 15 and the side surface 16 are continuous with any of the upper surface 11, the lower surface 12, the front surface 13, and the back surface 14 (see FIG. 1).

Further, the outlet 20 is formed on the upper surface 11 of the packaging bag 10. Specifically, the outlet 20 is arranged at 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 the sheet ST is pulled out from the outlet 20. The outlet 20 is formed by a slit M extending in the first direction (X direction).

The first direction (X direction) in which the slit M extends indicates a direction along a predetermined direction on the upper surface 11 of the packaging bag 10. Specifically, it corresponds to the longitudinal direction (X direction) of the sheet package 100.

The form of the slit M is not particularly limited, and can be formed by forming a perforation on the upper surface 11 of the packaging bag 10, for example, as shown in FIGS. 1 and 2. In the examples shown in FIGS. 1 and 2, the upper surface 11 of the packaging bag 10 is opened in the first direction (X direction) and torn (opened) by breaking the outlet 20 formed by the slit M (perforation). The outlet 20 (made) constitutes the outlet OP of the sheet ST (see FIG. 4).

In the first direction (X direction), the dimension (length L2) of the outlet 20 (slit M) can be arbitrarily determined according to the dimension of the sheet ST to be taken out. For example, the difference between the length L2 of the outlet OP in the left-right direction (X direction) and the width dimension (length L1) of the packaging bag 10 in which the sheet ST is housed is -100 mm or more and 0 mm or less, preferably −. It is 80 mm or more and 0 mm or less, more preferably −70 mm or more and −10 mm or less. When these are converted into the ratio of the length L2 of the outlet OP to the width dimension (length L1) of the packaging bag 10 in the left-right direction (X direction), it is 100% or less, preferably 80% or less, and more. It is preferably 10% or more and 75% or less.

Further, the perforations forming the outlet 20 (slit M) are configured such that the cut portions C and the tie portions T are alternately arranged (see FIGS. 2 and 3). The tie portion T is an uncut portion between two adjacent cut portions C.

In the slit M (perforation), the length of the cut portion C and the length of the tie portion T are arbitrary. The length of each cut portion C 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. The length of each tie portion 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. is there.

In the sheet package 100 of the present embodiment, as shown in FIGS. 1 to 3, at least a part of the slit M forming the outlet 20 has a wavy line shape. Here, at least a part of the slit M means all or a part of the slit M. Further, the wavy line shape indicates a wavy linear shape. In the present embodiment, all of the slits M forming the outlet 20 have a wavy line shape.

Further, in the sheet package 100 of the present embodiment, the wavy line shape of the slit M forming the outlet 20 has a shape in which the mountain portions 21 and the valley portions 22 are alternately arranged in the first direction (X direction). (See FIGS. 2 and 3).

In the wavy line shape of the outlet 20 (slit M), the relationship between the peak portion 21 and the valley portion 22 is such that the wavy line forming the wavy line shape has a convex portion that is convex to one side (the back surface 14 side of the packaging bag 10). When the portion 21 is used, the convex portion that is convex toward the other side (front surface 13 side of the packaging bag 10) facing the one side is relatively the valley portion 22. Further, the fact that the peaks 21 and the valleys 22 are arranged alternately means that the plurality of peaks 21 and the plurality of valleys 22 constituting the wavy line shape are arranged every other along the first direction (X direction). (See FIGS. 2 and 3).

Further, in the sheet package 100 of the present embodiment, as shown in FIGS. 2 and 3, in the wavy line shape of the outlet 20 (slit M), the top 21a of the mountain portion 21 and the top (bottom) 22a of the valley portion 22. At least one of is curled up. That is, in the present embodiment, the wavy line shape of the outlet 20 (slit M) is a substantially sine wave shape.

Here, the top 21a of the mountain portion 21 indicates the apex of the mountain portion 21 and its vicinity, and the top (bottom) 22a of the valley portion 22 indicates the apex (valley bottom) of the valley portion 22 and its vicinity. Further, that at least one of the top 21a of the mountain portion 21 and the top 22a of the valley 22 is rounded means that a part or all of the top 21a of the mountain portion 21 and / or a part of the top 22a of the valley 22 or Indicates that everything is curved (curved).

Further, in the sheet package 100 of the present embodiment, at least a part of the slit M having a wavy line shape constitutes the central portion 20a of the outlet 20. Here, the central portion 20a of the outlet 20 indicates a portion that occupies about one-third of the entire slit M extending in the first direction (X direction) at substantially the center of the outlet 20. Further, the central portion 20a of the outlet 20 is a portion where stress is concentrated when the sheet ST is taken out from the outlet 20.

In the present embodiment, all including the central portion 20a of the outlet 20 are formed by the wavy line shape of the slit M. That is, the entire outlet 20 has a wavy line shape (see FIGS. 1 to 3). The aspect of the outlet 20 (slit M) is not limited to the embodiment of the present embodiment. For example, only the central portion 20a of the outlet 20 is formed in a wavy shape, and both ends 20b and 20c of the outlet 20 are formed. It may be composed of straight lines.

Further, in the sheet package 100 of the present embodiment, at least a part of the slit M having a wavy line shape is arranged at at least one end of the outlet 20. Here, at least one end of the outlet 20 indicates both ends 20b, 20c or one of the ends 20b, 20c of the outlet 20 extending in the first direction (X direction). Both ends 20b and 20c of the outlet 20 have a large frictional force (or resistance) applied when the sheet ST is taken out from the outlet 20, and are easily torn.

In the present embodiment, all of the outlets 20 including both ends 20b and 20c are formed by the wavy line shape of the slit M. That is, as described above, the entire outlet 20 has a wavy line shape (see FIGS. 1 to 3). The aspect of the outlet 20 (slit M) is not limited to the embodiment of the present embodiment. For example, only both ends 20b and 20c of the outlet 20 are formed in a wavy shape, and the central portion 20a of the outlet 20 is formed. It may be composed of straight lines. Further, only one end 20b of the outlet 20 may be formed in a wavy line shape, and the central portion 20a of the outlet 20 and the other end 20c may be formed in a straight line.

Further, in the sheet package 100 of the present embodiment, the wavy line-shaped wave height W2 is 1% or more 20 with respect to the width W1 in the second direction (Y direction) intersecting the first direction (X direction) of the upper surface 11. % Or less, preferably 3% or more and 18% or less, and more preferably 5% or more and 15% or less.

Here, the width W1 of the second direction (Y direction) intersecting the first direction (X direction) of the upper surface 11 is the packaging bag 10 along the direction (Y direction) intersecting the direction in which the slit M extends (X direction). The width W1 of the upper surface 11 of the above is shown. Further, the wavy wave height W2 indicates the distance between the top 21a of the wavy peak 21 and the top 22a of the valley 22 along the direction (Y direction) where the slit M extends (X direction). ..

Further, in the sheet package 100 of the present embodiment, the wavy line-shaped wavelength L3 is 10% or more and 40% or less, preferably 15%, with respect to the length L2 in the first direction (X direction) of the outlet 20. It is 35% or more, more preferably 20% or more and 30% or less.

Here, the length L2 of the outlet 20 in the first direction (X direction) indicates the length L2 of the outlet 20 along the direction (X direction) in which the slit M extends. Further, the wavy line wavelength L3 indicates the distance between the tops 21a of the adjacent mountain portions 21 having the wavy line shape or the distance between the tops 22a of the adjacent valleys 22 along the direction (X direction) in which the slit M extends.

Further, in the sheet package 100 of the present embodiment, the wavy line-shaped wavelength L3 is 5% or more and 45% or less, preferably 10% or more, with respect to the length L1 of the upper surface 11 in the first direction (X direction). It is 40% or less, more preferably 15% or more and 35% or less. Here, the length L1 of the upper surface 11 in the first direction (X direction) is the upper surface 11 of the packaging bag 10 along the direction (Y direction) intersecting with the packaging bag 10 along the direction in which the slit M extends (X direction). The length L1 of is shown.

In the first embodiment, as described above, when the slit M (perforation) formed on the upper surface 11 of the packaging bag 10 is opened, the slit M is formed in the first direction (X direction) of the upper surface 11 of the packaging bag 10. A wavy outlet 20 (OP) corresponding to (perforation) is formed (see FIG. 4). In such a configuration, the wavy portion of the outlet 20 is easily turned over, so that the outlet 20 can be easily opened with a fingertip. Therefore, in the present embodiment, the fingertip can be easily inserted into the outlet 20, and the sheet ST can be easily taken out even when the first first sheet ST housed in the packaging bag 10 is taken out.

Further, in the present embodiment, since the portion of the outlet 20 having a wavy line shape is easily turned over as described above, the outlet 20 is easily opened (see FIG. 4). Therefore, in the present embodiment, when the sheet ST in the packaging bag 10 is taken out (or pulled out), the sheet ST is less likely to be clogged in the take-out port 20. Further, since the sheet ST is less likely to be clogged in the outlet 20, the rubbing between the outlet 20 and the sheet ST is alleviated. Therefore, in the present embodiment, the sheet ST is less likely to be torn when the sheet ST is taken out from the outlet 20.

Further, in the present embodiment, the portion of the outlet 20 having a wavy line shape serves as a cushioning portion, and the outlet 20 can be deformed according to the weight of the sheet ST held by the outlet 20 during use. That is, the peak portion 21 and / or the valley portion 22 forming the wavy line shape of the outlet 20 causes a kind of counter-stopping action on the sheet ST. As a result, in the present embodiment, the holding force of the sheet ST at the outlet 20 is maintained even during use, and it is possible to prevent the sheet ST from falling into the packaging bag 10 during use (hereinafter, referred to as the drop of the sheet ST). it can.

Further, in the present embodiment, as described above, the sheet ST is less likely to be clogged in the outlet 20 (the friction between the outlet 20 and the sheet ST can be alleviated), so that the outlet 20 is not worn during use. Can be reduced. From such a viewpoint as well, it is possible to suppress a decrease in the holding force of the sheet ST at the outlet 20 and prevent the sheet ST from falling.

Further, in the present embodiment, the frictional force (or resistance force) applied to the outlet 20 when the sheet ST is taken out can be released (or dispersed) to the wavy line-shaped portion (buffer portion) of the outlet 20. As a result, in the present embodiment, even if the remaining sheet ST is reduced during use (that is, even if the weight of the sheet package 100 is reduced), the entire packaging bag 10 is lifted when the sheet ST is taken out (hereinafter, , The lifting of the packaging bag 10) can be prevented.

Further, in the present embodiment, as described above, the wavy peaks 21 and valleys 22 are alternately arranged in the first direction (X direction) to relieve the stress applied to the outlet 20 and its surroundings. It can be released (or dispersed) over the entire portion (buffer portion) having a wavy line shape of 20. Thereby, in the present embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a well-balanced manner while facilitating the taking out of the sheet ST.

Further, in the present embodiment, as described above, at least one of the top portion 21a of the mountain portion 21 and the top portion 22a of the valley portion 22 is rounded, so that a plurality of slits M (perforations) having a wavy line shape are partially formed. In the case of the cut portion C of the above, even if the size of each cut portion is reduced, the outlet 20 can be opened in a wavy shape corresponding to the slit M.

Further, in the present embodiment, since the central portion 20a of the outlet 20 has a wavy shape of the slit M, a portion (buffer portion) having a wavy shape of the outlet 20 is provided in the portion where stress is concentrated in the outlet 20. Can be provided. Thereby, in the present embodiment, the stress concentrated on a part of the outlet 20 can be efficiently released (or dispersed) to the entire portion (buffer portion) having the wavy line shape of the outlet 20.

Further, in the present embodiment, at least one end 20b, 20c of the outlet 20 has a wavy shape of the slit M, so that the portion where the frictional force (or resistance) due to the sheet ST is large is the portion of the outlet 20. A portion having a wavy line shape (buffer portion) can be provided. As a result, the frictional force (or resistance force) applied to a part of the outlet 20 can be efficiently released (or dispersed) to the entire portion (buffer portion) having the wavy line shape of the outlet 20. Therefore, according to the present embodiment, it is possible to prevent the ends 20b and 20c of the outlet 20 from being torn during use.

Further, in the present embodiment, by setting the wave height W2 of the wavy line shape of the slit M to the above range with respect to the width W1 of the upper surface 11, the stress applied to the outlet 20 and its periphery can be set to the wavy line shape of the outlet 20. It can be efficiently released (or dispersed) over the entire holding portion (buffer portion). Thereby, in the present embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

Further, in the present embodiment, the wavy line-shaped wavelength L3 of the outlet 20 is set to the above range with respect to the length L2 of the outlet 20, so that the stress concentrated on a part of the outlet 20 is released to the outlet 20. It can be released (or dispersed) more efficiently with respect to the entire portion having the wavy line shape (buffer portion). Thereby, in the present embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

Further, in the present embodiment, by setting the wavy wavelength L3 at the outlet 20 within the above range with respect to the length L1 of the upper surface 11, the stress concentrated on a part of the outlet 20 is applied to the outlet 20. It can be released (or dispersed) more efficiently over the entire portion having a wavy line shape (buffer portion). Thereby, in the present embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

FIG. 5 is an enlarged view of the outlet 20 in the sheet package 100 according to the modified example of the first embodiment. In the modified example of the first embodiment, as shown in FIG. 5, in the wavy line shape of the outlet 20 (slit M), both the top 21a of the mountain portion 21 and the top 22a of the valley portion 22 are angular (rounded). Absent). That is, in the modified example of the first embodiment, the wavy line shape of the outlet 20 (slit M) is substantially a triangular wave shape (see FIG. 5).

In the modified example of the first embodiment, similarly to the first embodiment described above, the wavy line shape of the slit M forming the outlet 20 has mountain portions 21 and valley portions 22 alternately in the first direction (X direction). It has a lined shape.

As a result, even in the modified example of the first embodiment, the stress applied to the outlet 20 and its surroundings can be released (or dispersed) to the entire portion (buffer portion) having the wavy line shape of the outlet 20. Therefore, even in the modified example of the first embodiment, it is possible to easily take out the sheet ST and prevent the sheet ST from falling and the packaging bag 10 from being lifted in a well-balanced manner.

In the modified example of the first embodiment, the top portion 21a of the mountain portion 21 and the top portion 22a of the valley portion 22 are both angular (not rounded), but the present invention is not limited to this embodiment. Therefore, for example, all or part of the top 21a of the mountain portion 21 or all or part of the top 22a of the valley portion 22 may be rounded (not necessarily angular).

FIG. 6 is an enlarged view of the outlet in the sheet package according to the second embodiment. In the second embodiment, the wavy line shape of the outlet 20 (slit M) has two or more wave heights, and the portion having the largest wave height among the two or more wave heights is located in the central portion 20a of the outlet 20. Have been placed. In the present embodiment, as shown in FIG. 6, the portion where the wavy line shape of the outlet 20 (slit M) has two wave heights W2 and W3 and has a wave height W3 larger than the wave height W2 is the outlet 20. It is arranged in the central portion 20a.

Here, the wavy line-shaped wave height W3 is the distance between the top 23a of the wavy peak 23 and the top 24a of the valley 24 along the direction (Y direction) where the slit M extends (X direction). Shown. Further, having two or more wave heights means that the wavy lines forming the wavy line shape have at least two kinds of wave heights.

Further, in the second embodiment, the largest wave height W3 among the two or more wave heights is 20% or more with respect to the width W1 in the second direction (Y direction) intersecting the first direction (X direction) of the upper surface 11. It is 40% or less, preferably 23% or more and 37% or less, and more preferably 25% or more and 35% or less. In the present embodiment, as shown in FIG. 6, the wave height W3 larger than the wave height W2 is 20 or more and 40 with respect to the width W1 in the second direction (Y direction) intersecting the first direction (X direction) of the upper surface 11. It is less than%.

In the second embodiment, as described above, the central portion 20a of the outlet 20 has a wavy line shape having the largest wave height W3 among the two or more wave heights W2 and W3, so that the central portion 20a is concentrated on a part of the outlet 20. The stress to be applied can be released (or dispersed) more efficiently with respect to the entire portion (buffer portion) having the wavy line shape of the outlet 20. Thereby, in the second embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

Further, in the second embodiment, the largest wave height W3 among the two or more wave heights W2 and W3 having the wavy line shape of the slit M is set to the above range with respect to the width W1 of the upper surface 11, so that the outlet 20 The stress concentrated on a part can be released (or dispersed) more efficiently with respect to the entire wavy portion (buffer portion) of the outlet 20. Thereby, in the second aspect, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

FIG. 7 is an enlarged view of the outlet 20 in the sheet package 100 according to the modified example of the second embodiment. In the modified example of the second embodiment, as shown in FIG. 7, in the wavy line shape of the outlet 20 (slit M), the top 21a of the mountain portion 21, the top 22a of the valley 22, and the top 23a of the mountain portion 23 and The tops 24a of the valley 24 are all angular (not rounded). That is, in the modified example of the second embodiment, the wavy line shape of the outlet 20 (slit M) is substantially a triangular wave shape (see FIG. 7).

In the modified example of the second embodiment, similarly to the second embodiment described above, the wavy line shape of the outlet 20 (slit M) has two wave heights W2 and W3, and is the most of the two wave heights W2 and W3. A portion having a large wave height W3 is arranged in the central portion 20a of the outlet 20.

As a result, even in the modified example of the second embodiment, the stress concentrated on a part of the outlet 20 is released (or dispersed) more efficiently with respect to the entire portion (buffer portion) having the wavy line shape of the outlet 20. Can be done). Therefore, even in the modified example of the second embodiment, it is possible to prevent the sheet ST from falling and the packaging bag 10 from being lifted in a more balanced manner while facilitating the taking out of the sheet ST.

In the modified example of the second embodiment, the top 21a of the mountain portion 21 and the top 22a of the valley 22 and the top 23a of the mountain 23 and the top 24a of the valley 24 are all angular (not rounded). However, this embodiment is not limited to this embodiment. Therefore, in the present embodiment, for example, all or part of the top 21a of the mountain portion 21, all or part of the top 22a of the valley portion 22, all or part of the top 23a of the mountain portion 23, or the valley portion 24 All or part of the top 24a of the may be rounded (not necessarily angular).

Hereinafter, the present invention will be specifically described with reference to Examples. The evaluation of Examples and Comparative Examples was carried out by the following tests.

[Sheet package (test body)]
As a test body, a sheet package 100 in which a sheet laminate SL in which a plurality of sheets ST were laminated was packaged in a packaging bag 10 was prepared (see FIGS. 1 and 8). The sheet laminated body SL is a tissue paper (basis weight: 10.7 g / m ² , paper thickness: 110 μm, number of plies: 2 plies, which is laminated so that the sheets ST can be folded alternately and pulled out one by one in a pop-up manner. The number of sets: 150 sets (300 sheets), dimensions: bulk (height) about 40 mm, length (width) about 198 mm, width (length) about 100 mm) were used. Further, the sheet laminated body SL was housed in the packaging bag 10 so that the laminating direction (SD direction) was the height direction (Z direction) of the sheet packaging body 100 (see FIGS. 1 and 8). Further, as the material of the packaging bag 10, polyethylene (PE) having a thickness of 50 μm was used. In the packaging form of the packaging bag 10, both side surfaces 15 and 16 of the sheet packaging body 100 are sealed with caramel packaging (seal portions 30 and 40 are formed). The dimensions of the sheet package 100 are such that the length L1 (length in the X direction) of the upper surface 11 of the packaging bag 10 is about 200 mm, the width W1 (width in the Y direction) is about 100 mm, and the height (height in the Z direction) is about 40 mm. And said. Further, an outlet 20 (slit M) extending in the first direction (X direction) is formed on the upper surface 11 of the packaging bag 10 at a perforation. For the slit M (perforation), the length of each cut portion C is about 3.0 mm, and the length of the tie portion T is about 1.0 mm.

[Drawer resistance value]
The pull-out resistance value of the sheet package 100 was confirmed. To confirm the withdrawal resistance value, place the above-mentioned test body (sheet package 100) on a flat mounting surface, and halve the first set of tissue paper (sheet ST) from the outlet 20 (OP) of the packaging bag 10. The upper tip of the drawn sheet ST (the central portion in the longitudinal direction (X direction) of the sheet package 100) was sandwiched between eyeball clips (manufactured by KOKUYO Co., Ltd., "Clear-17"). Pass the hook of the push-pull gauge (manufactured by Imada Co., Ltd., model number: Z2-20) through one hole of the handle of the eyeball clip, and take 0.4 to 0.6 seconds at a constant speed to accommodate the container. The resistance force (unit: kgf) when the tissue paper was pulled out in the direction perpendicular to the upper surface of the above was measured. The evaluation criteria for the withdrawal resistance value shall be good when the resistance when pulled out is 0.2 kgf or less (sheet ST is easy to take out), and not good when it exceeds 0.2 kgf (sheet ST is taken out). It was difficult).

[Removability (initial)]
The initial takeability of the sheet package 100 was confirmed. In the confirmation of removability, the first sheet of the sheet laminate SL from the sheet laminate SL housed in the packaging bag 10 of the sheet package 100 is passed through the opened outlet 20 (OP) of the packaging bag 10. The ease of taking out the ST was evaluated. The retrievability (initial) was evaluated according to the following criteria.
5: The first set is very easy to pinch 4: The first set is easy to pinch 3: The first set is pinched 2: The first set is pinched but difficult to pinch 1: The first set is Pinch but very difficult to pinch

[Non-depressive]
The non-depressing property of the sheet ST housed in the packaging bag 10 of the sheet packaging body 100 was confirmed. In the confirmation of non-depression, when the sheet ST was pulled out from the sheet laminate SL through the outlet 20 of the packaging bag 10, it was evaluated whether the sheet ST did not fall into the packaging bag 10 (non-depression). The non-depressiveness was evaluated according to the following criteria.
5: No sheet ST depression 4: Sheet ST depression 1 to 3 times 3: Sheet ST depression 4 to 6 times 2: Sheet ST depression 7 to 9 times 1: Sheet ST has dropped more than 10 times

[Non-lifting]
The non-liftability of the packaging bag 10 containing the sheet ST of the sheet packaging body 100 was confirmed. In the confirmation of non-lifting property, it was evaluated whether or not the packaging bag 10 was lifted (non-lifting property) when the sheet ST was pulled out from the sheet laminated body SL through the outlet 20 of the sheet packaging body 100. The non-lifting property was evaluated according to the following criteria.
5: The packaging bag 10 is not lifted 4: The packaging bag 10 is lifted when the sheet ST is 1 or more and 3 pairs or less 3: The packaging bag 10 is lifted when the sheet ST is 4 or more and 6 pairs or less 2 : The packaging bag 10 is lifted when the sheet ST is 7 or more and 9 or less. 1: The packaging bag 10 is lifted when the sheet ST is 10 or more.

[Tensile strength]
The tensile strength of the sheet package 100 was confirmed. For confirmation of tensile strength, a test piece obtained by cutting a polyethylene (PE) film having a thickness of 50 μm into a width (length) of about 60 mm and a length (width) of about 50 mm was prepared. At the center of the test piece, perforations extending at intervals of about 40 mm in the length direction of the test piece were formed with predetermined tie cuts (cut: about 3.0 mm, tie: about 1.0 mm). The shape of the perforation was a curved shape in Example 1 and a straight shape in Comparative Example 1. In Example 1, the perforations are about 25 mm from both ends in the width direction of the test piece, and in Comparative Example 1, both ends of the perforations are about 25 mm from both ends in the width direction of the test piece. The central portion (top of the curved portion) of the test piece was set to a position of about 10 mm from one end in the width direction of the test piece. To measure the tensile strength, attach a film clip (IMADA, FC-40) to the push-pull gauge (IMADA, Z2-20) set on the measuring stand (IMADA MX-500N), and the width of the test piece. The approximately center of one end in the direction is sandwiched between film clips, the approximately center of the other end in the width direction of the test piece is fixed to the measuring stand, and the test piece is pulled at a speed of 100 mm / min to provide strength at break. (Tensile strength, unit: gf) was measured.

Hereinafter, Examples and Comparative Examples will be described.

[Example 1]
In the sheet package 100, as shown in FIGS. 1 to 3, the outlet 20 formed on the upper surface 11 of the packaging bag 10 is formed by slits M having a wavy line shape as a whole. The wavy line shape of the outlet 20 (slit M) is such that the peaks 21 and valleys 22 are alternately arranged in the first direction (X direction), and the tops 21a of the peaks 21 and the tops 22a of the valleys 22 are all rounded. (Approximately sinusoidal shape). The length L2 of the outlet 20 (slit M) in the first direction (X direction) was set to about 185 mm. The wavy line shape of the outlet 20 (slit M) has a wave height W2 of about 10 mm (about 10% of the width W1 of the upper surface 11 of the packaging bag 10) and a wavelength L3 of about 46 mm (the length L2 of the outlet 20). On the other hand, it was about 25%). This specimen was evaluated for pull-out resistance, withdrawal (early stage), non-depression, and non-lifting. The results are shown in Table 1.

[Example 2]
In the sheet package 100, as shown in FIG. 5, the wavy line shape of the outlet 20 (slit M) is changed to a shape in which the top 21a of the mountain portion 21 and the top 22a of the valley portion 22 are all angular (substantially triangular wave shape). The evaluation was carried out in the same manner as in Example 1 except that. The results are shown in Table 1.

[Example 3]
In the sheet package 100, as shown in FIG. 6, the portion where the wavy line shape of the outlet 20 (slit M) has two wave heights W2 and W3 and has a wave height W3 larger than the wave height W2 is the center of the outlet 20. Evaluation was carried out in the same manner as in Example 1 except that it was arranged in part 20a. The results are shown in Table 1.

[Example 4]
In the sheet package 100, as shown in FIG. 7, a portion where the wavy line shape of the outlet 20 (slit M) has two wave heights W2 and W3 and has a wave height W3 larger than the wave height W2 is the central portion of the outlet 20. The evaluation was carried out in the same manner as in Example 3 except that it was arranged at 20a. The results are shown in Table 1.

[Comparative Example 1]
In the sheet package 100, as shown in FIGS. 8 and 9, the outlet 20 is formed by a linear slit M, and the length L2 of the outlet 20 (slit M) in the first direction (X direction) is approximately reduced. The evaluation was carried out in the same manner as in Example 1 except that the thickness was 185 mm. The results are shown in Table 1.

From Table 1, the sheet package 100 having the take-out port 20 formed by the slit M having a wavy line shape on the upper surface 11 of the package bag 10 has all the take-out property (initial), the non-depressing property, and the non-lifting property. The evaluation was 3 or more (Examples 1 to 4).

On the other hand, the sheet package 100 having the take-out port 20 formed by the linear slit M was evaluated to have take-out property (initial), non-depression property, and non-lifting property of 2 or less (Comparative Example 1). ).

Further, the sheet package 100 in which the portion of the outlet 20 (slit M) having a wavy line shape having two wave heights W2 and W3 and having a wave height W3 larger than the wave height W2 is arranged in the central portion 20a of the outlet 20 is The takeability (initial) was improved (Example 3, Example 4).

Further, the wavy line shape of the outlet 20 (slit M) is a sheet package in which the top 21a of the mountain portion 21, the top 22a of the valley portion 22, the top 23a of the mountain portion 23, and the top 24a of the valley portion 24 are all angular. In 100, not only the take-out property (initial stage) but also the non-depressing property and the non-lifting property were improved (Example 4).

Further, the tensile strength of the slit M (perforation) of the outlet 20 is almost different between the case where the shape of the slit M (perforation) is linear (Comparative Example 1) and the case where the shape is wavy (Example 1). It became nothing. As a result, even when the outlet 20 is formed by the wavy slit M (perforation), it is considered that the outlet 20 can be opened in a wavy shape (opening property does not decrease).

From these results, a sheet package in which the outlet formed on the upper surface of the packaging bag is formed by a slit extending in the first direction and at least a part of the slit is wavy is improved in the ease of taking out and opening the sheet. It turned out to be excellent.

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

100 sheet packaging ST sheet (sanitary tissue paper)
SL sheet laminate 10 Packaging bag 11 Top surface 11a Center 11b End part 12 Bottom surface 13 Front surface 14 Back surface 15 Side surface 16 Side surface 20 Outlet M Slit C Cut part T Tie part 21 Mountain part 21a Top part 22 Valley part 22a Top part 23 Mountain part 23a Top 24 Tanibe 24a Top

Claims (9)

Multiple stacked sheets and
The packaging bag containing the sheet and
It is formed on the upper surface of the packaging bag and has an outlet from which the sheet is pulled out.
The outlet is formed by a slit extending in the first direction.
A sheet package in which at least a part of the slit is wavy. The sheet package according to claim 1, wherein the wavy line shape has peaks and valleys alternately arranged in the first direction. The sheet package according to claim 1 or 2, wherein the part having the wavy line shape is the central portion of the outlet. The sheet package according to any one of claims 1 to 3, wherein the part having the wavy line shape is at least one end of the outlet. The sheet package according to any one of claims 1 to 4, wherein the wavy wave height is 1 to 20% with respect to the width of the upper surface in the second direction intersecting with the first direction. The wavy line shape has two or more wave heights.
The sheet package according to any one of claims 1 to 5, wherein the portion having the largest wave height among the two or more wave heights is arranged in the central portion of the outlet. The sheet package according to claim 6, wherein the largest wave height is 200 to 40% with respect to the width of the upper surface in the second direction intersecting with the first direction. The sheet packaging according to any one of claims 1 to 7, wherein the wavy wavelength is 10 to 40% of the length of the outlet in the first direction. The sheet package according to any one of claims 1 to 8, wherein the wavelength of the wavy line shape is 5 to 45% with respect to the length of the upper surface in the first direction.

Images