Sheet packaging

Abstract

To provide a sheet package that can be compacted while maintaining sheet softness without deteriorating the ease of take-out.SOLUTION: A sheet package comprises: a sheet stack in a rectangular solid shape in which multiple sheets are stacked; a packaging bag made of a resin film accommodating the sheet stack; and a take-out port which is formed on a top surface of the packaging bag and from which the sheets are drawn out. In the sheet package, the sheet stack is accommodated in the packaging bag in a compact state; the dry tensile strength in a CD direction of the sheets is from 100 cN to 170 cN inclusive; and the compression work WC in the thickness direction of the sheets is from 110 gf cm / cm2 to 180 gf cm / cm2 inclusive.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a sheet packaging body. [Background technology]

[0002] For sanitary thin papers such as tissue paper, carton-type packaging in which the web is housed in a cardboard box is widespread; however, from the standpoints of transportation, storage, disposal, environmental impact, cost, etc., there has been an increasing demand in recent years for film packs in which the web is housed in a packaging bag made of resin film (see, for example, Patent Document 1).

[0003] Furthermore, the individual film packs are further housed in a film-like packaging bag and distributed as collective packages (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-177901 A [Patent Document 2] Patent Publication No. 2021-54517 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for more compact film packs from the standpoint of improving transportation efficiency and reducing the amount of film resin raw material used, but when film packs are made more compact, the sheets can become crushed and stiff, or the sheets can get stuck when attempting to remove them, making them difficult to remove.

[0006] An object of the present invention is to provide a sheet packaging body in which the softness of the sheet is maintained and the ease of removal is not impaired even when the sheet packaging body is made compact. [Means for solving the problem]

[0007] A first aspect of the present invention is a sheet packaging body having a rectangular parallelepiped sheet laminate in which a plurality of sheets are laminated, a packaging bag made of a resin film that contains the sheet laminate, and an outlet formed on the top surface of the packaging bag through which the sheets are pulled out, the sheet packaging body being contained in the packaging bag in a state in which the sheet laminate is fastened, the dry tensile strength in the CD direction of the sheet being 100 cN or more and 170 cN or less, and the compression work WC in the thickness direction of the sheet being 110 gf cm / cm 2 More than 180gf cm / cm 2 The following sheet packaging body is provided:

[0008] In the first embodiment, the dry tensile strength of the sheet in the CD direction is 100 cN or more and 170 cN or less, and the compression work load WC of the sheet in the thickness direction is 110 gf cm / cm 2 More than 180gf cm / cm 2 By satisfying the above condition, even if the sheet laminate is stored in a packaging bag in a tightened state, the sheets are unlikely to be crushed and are unlikely to get stuck when the sheet is removed. Therefore, according to the first aspect, even if the sheet packaging body is made compact, the softness of the sheets is maintained and the decrease in the ease of removing the sheets can be suppressed.

[0009] A second aspect of the present invention provides the sheet packaging body according to the first aspect, wherein a ratio of the compression work load WC to a thickness of a resin film constituting the packaging bag is 2.8 or more and 4.5 or less.

[0010] In the second aspect, the ratio of the compression work load WC to the thickness of the resin film constituting the packaging bag is set to 2.8 to 4.5, thereby further suppressing clogging of the sheet during removal. Therefore, according to the second aspect, even if the sheet packaging body is made compact, the softness of the sheet can be maintained and the ease of removal of the sheet can be prevented from decreasing.

[0011] A third aspect of the present invention provides the sheet packaging body according to the first or second aspect, wherein a ratio of the compression work load WC to a height of the sheet packaging body is 1.8 or more and 3.4 or less.

[0012] In the third aspect, the ratio of the compression work load WC to the height of the sheet packaging body is set to 1.8 to 3.4, thereby further suppressing clogging of the sheets during removal. Therefore, according to the third aspect, even if the sheet packaging body is made compact, the softness of the sheets can be maintained and the ease of removal of the sheets can be prevented from decreasing.

[0013] A fourth aspect of the present invention provides the sheet packaging body according to any one of the first to third aspects, wherein a ratio of the compression work load WC to the height of the sheet stack is 1.8 or more and 3.2 or less.

[0014] In the fourth aspect, the ratio of the compression work load WC to the height of the sheet stack is set to 1.8 to 3.2, which further suppresses clogging of the sheets during removal. Therefore, according to the third aspect, even if the sheet package is made compact, the softness of the sheets can be maintained and the ease of removal of the sheets can be prevented from decreasing.

[0015] A fifth aspect of the present invention provides the sheet packaging body according to any one of the first to fourth aspects, wherein a hand feel value HF measured by a sheet softness measuring device TSA is 60 or more.

[0016] In the fifth aspect, the hand feel value HF measured by the sheet softness measuring device TSA is 60 or more, so that the touch of the sheet can be maintained even if the sheet package is made compact.

[0017] A sixth aspect of the present invention provides the sheet packaging body according to any one of the first to fifth aspects, wherein the softness peak TS7 measured by a sheet softness measuring device TSA is 15 or less.

[0018] In the sixth aspect, since the softness peak TS7 measured by the sheet softness measuring device TSA is 15 or less, the softness of the sheet can be maintained even if the sheet package is made compact.

[0019] A seventh aspect of the present invention provides the sheet packaging body according to any one of the first to sixth aspects, wherein the sheet has a smoothness peak TS750 of 15 or less as measured by a sheet softness measuring device TSA.

[0020] In the seventh aspect, the smoothness peak TS750 measured by a sheet softness measuring device TSA is 15 or less, so that the smoothness of the sheet can be maintained even if the sheet package is made compact. Effect of the Invention

[0021] According to one aspect of the present invention, it is possible to provide a sheet packaging body in which the softness of the sheet is maintained even when the sheet packaging body is made compact, and the ease of removal is not easily reduced. [Brief description of the drawings]

[0022] [Figure 1] 11A and 11B are diagrams showing a mode for measuring the compression work of a sheet in a sheet packaging body. [Diagram 2] FIG. 2 is a diagram showing a sheet stack contained in a sheet packaging body. [Diagram 3] FIG. [Figure 4] 11A and 11B are diagrams showing a mode for measuring a removal resistance value of a sheet in a sheet packaging body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In some cases, parts common to each drawing are given the same reference numerals and their explanations are omitted. In addition, the scale of each member in each drawing may differ from the actual scale.

[0024] In this specification, the directions of the drawings are described using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z directions). In each drawing, the left-right direction (the longitudinal direction of the sheet wrapping body or sheet assembly wrapping body) is the X direction, the front-rear direction (the lateral direction of the sheet wrapping body or sheet assembly wrapping body) is the Y direction, and the up-down direction (the height direction of the sheet wrapping body or sheet assembly wrapping body) is the Z direction.

[0025] In addition, in this specification, deviations in each direction are permitted to the extent that they do not impair the functions and effects of the embodiments. Furthermore, perpendicular may include substantially perpendicular.

[0026] <Sheet packaging> The sheet packaging body 100 according to this embodiment includes a sheet laminate SL and a packaging bag 10 (FIGS. 1 and 2). In this embodiment, the sheet laminate SL is accommodated in the packaging bag 10 so that the stacking direction of the sheets S constituting the sheet laminate SL is the height direction (Z direction). The sheet packaging body 100 is an example of the sheet packaging body according to this embodiment.

[0027] The sheet stack SL is formed by stacking a plurality of sheets (or a plurality of sets of sheets S). The shape of the sheet stack SL is a rectangular parallelepiped. The sheet stack SL is configured so that the sheets S can be pulled out one by one (or one set by one) through an outlet 20 (OP) formed on the top surface 11 of the packaging bag 10.

[0028] The material of the sheet is not particularly limited, and may be, for example, paper, nonwoven fabric, or cloth, and is preferably tissue paper. When the sheet is tissue paper, the pulp composition may be a known composition for tissue paper. The blending ratio of pulp may be, for example, 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0029] The basis weight of the sheet is not particularly limited, but in the case of paper, it is 5 g / m depending on the number of plies. 2 More than 80g / m 2 less than 8 g / m 2 More than 50g / m 2 Less than 10 g / m2 More than 14g / m 2 For nonwoven fabrics, the maximum is 20 g / m 2 More than 100g / m 2 The following is preferable. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0030] The thickness of the sheet is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, when the sheet is a thin paper, the thickness of the thin paper is 40 μm or more and 500 μm or less per ply (two plies in the case of two plies), preferably 70 μm or more and 250 μm or less, more preferably 110 μm or more and 200 μm or less.

[0031] The dry tensile strength in the MD direction of the sheet S is arbitrary, but is preferably 100 cN to 600 cN, more preferably 200 cN to 500 cN, and even more preferably 270 cN to 470 cN. Here, the MD direction refers to the flow direction (or machine direction) of the fibers during the production of the tissue paper. The dry tensile strength in the MD direction refers to the strength of the tissue paper when it is pulled in the MD direction in a dry state.

[0032] S The dry tensile strength in the CD direction of tissue paper S is 100 cN or more and 170 cN or less, preferably 105 cN or more and 165 cN or less, and more preferably 110 cN or more and 155 cN or less. Here, the CD direction refers to the direction perpendicular to the flow direction of the fibers (or the horizontal direction) during the production of the tissue paper. The dry tensile strength in the CD direction refers to the strength of the tissue paper when it is pulled in the CD direction in a dry state.

[0033] The sheet S after being removed from the sheet packaging body 100 has a hand feel value HF (hereinafter referred to as HF value) measured by a softness measuring device TSA of preferably 60 or more, more preferably 65 or more, and further preferably 70 or more. The upper limit of the HF value is not particularly limited, but is at least 100 as a conservative estimate.

[0034] Here, the softness measuring device TSA (hereinafter referred to as TSA) refers to a tissue softness measuring device (TSA: Tissue Softness Analyzer) manufactured by Emtec Electronic Co., Ltd. The TSA is a device that measures the properties of flat and soft materials such as tissue, fabric, and leather.

[0035] The HF value is calculated from three parameters, which indicate softness, smoothness, and stiffness, measured by TSA. The HF value is calculated using Facial III, a standard algorithm from Emtec Electronic. In this embodiment, the higher the HF value, the better the feel of the tissue paper tends to be.

[0036] Furthermore, the sheet S after being removed from the sheet packaging body 100 has a softness peak TS7 measured by TSA of preferably 15 or less, more preferably 14.5 or less, and even more preferably 14 or less. The lower limit of the peak TS7 is not particularly limited, but is 5 or more at most.

[0037] Here, the softness peak TS7 (hereinafter referred to as TS7) indicates a parameter of softness measured by TSA. In this embodiment, the lower the value of TS7, the softer the sheet S tends to feel. Note that TS7 is used in the calculation of the above-mentioned hand feel value HF (HF value).

[0038] Furthermore, the sheet S after being removed from the sheet packaging body 100 has a smoothness peak TS750 measured by TSA of preferably 15 or less, more preferably 14 or less, and even more preferably 13 or less. The lower limit of the peak TS750 is not particularly limited, but is at most 5 or more.

[0039] Here, smoothness peak TS750 (hereinafter referred to as TS750) indicates a parameter of smoothness measured by TSA. In this embodiment, the lower the TS750 value, the smoother the sheet S tends to feel. Note that TS750 is used in the calculation of the hand feel value HF together with the above-mentioned TS7.

[0040] 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 are alternately stacked in a folded state (a so-called pop-up type sheet stack SL). Furthermore, the form of the sheet stack SL is not limited to one that can be pulled out in a pop-up type, and it may be one in which multiple sheets (or multiple sets) are simply stacked, or one in which each sheet is stacked in a folded state.

[0041] The dimensions of the sheet laminate SL are such that the length in the longitudinal direction (X direction) of the sheet wrapping body 100 is 140 mm or more and 230 mm or less, the length in the lateral direction or depth direction (Y direction) perpendicular to the longitudinal direction (X direction) of the sheet wrapping body 100 is 80 mm or more and 120 mm or less, and the thickness in the height direction or thickness direction (Z direction) is 30 mm or more and 100 mm or less. The volume of the sheet laminate SL is 800 cm 3 More than 1200cm 3 It can be as follows:

[0042] The form of the sheets constituting the sheet laminate SL is not particularly limited, and can be applied to, for example, sanitary thin paper such as tissue paper, toilet paper, kitchen paper, and paper towels. The sheets such as tissue paper and paper towels are not limited to non-moisturizing type sheets, but also include moisturizing type sheets (sheets containing moisturizing components or moisturizers such as lotion tissue). The use of the sheets is not particularly limited, and can be applied to any of industrial, household, and portable uses. Among these, it is preferably used for non-moisturizing type tissue paper.

[0043] The method for manufacturing the sheet stack SL is not particularly limited. For example, the sheet stack SL can be manufactured using a rotary interfolder, a multi-stand interfolder (a device that folds sheets with a single folding plate and stacks them alternately to manufacture a web), etc. Note that the multi-stand interfolder has a high sheet supplying capacity.

[0044] In the sheet stack SL manufactured using the rotary interfolder, the sheets are stacked so that the direction in which the sheets are pulled out is the MD direction (the flow direction of the fibers that make up the sheets). That is, the movement direction of the sheets when they are pulled out from the outlet of the sheet wrapping body 100 is the MD direction. The movement direction of the sheets in the sheet stack SL inside the sheet wrapping body 100 is also the MD direction.

[0045] In addition, in the sheet stack SL manufactured using the multi-stand type interfolder, the sheets are stacked so that the direction in which the sheets are pulled out is the CD direction (a direction perpendicular to the MD direction). That is, the movement direction of the sheets when they are pulled out from the outlet of the sheet wrapping body 100 is the CD direction. The movement direction of the sheets is also the CD direction in the state of the sheet stack SL inside the sheet wrapping body 100.

[0046] In addition, when the sheet stack SL stacked in the multi-stand type interfolder is rectangular, the pair of long sides LL when viewed in the longitudinal direction (X direction) from one short side LS of the sheet stack SL is likely to become misaligned (the folds of the sheets are likely to be misaligned in the stacking direction (Z direction)) (Fig. 2). On the other hand, the multi-stand type interfolder has a high sheet supply capacity, so it can improve the productivity of the sheet stack, the sheet packaging that contains the sheet stack, and the sheet assembly packaging that contains multiple sheet packaging.

[0047] In addition, when a sheet stack is stacked in a rotary interfolder and the sheet stack is rectangular, a pair of long sides LL when viewed in the longitudinal direction (X direction) from one short side LS of the sheet stack tend to align (the folds of the sheets are less likely to shift in the stacking direction) (Figure 2).

[0048] The packaging bag 10 contains the sheet laminate SL.

[0049] The packaging bag 10, with the sheet laminate SL contained therein, has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, side surfaces 15, and side surfaces 16. In the packaging bag 10, the top surface 11 and the bottom surface 12 face each other in the up-down 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 all of the top surface 11, the bottom surface 12, the front surface 13, and the back surface 14 (see FIG. 1).

[0050] The sheet laminate SL contained in the packaging bag 10 has a top surface LT, a bottom surface LB, a pair of long sides LL, and a pair of short sides LS facing the top surface 11, bottom surface 12, front surface 13, back surface 14, side surfaces 15, and side surfaces 16 of the packaging bag 10, respectively.

[0051] The top surface 11 of the packaging bag 10 is provided with an outlet 20. The outlet 20 allows the sheet to be pulled out. The outlet is configured as an opening OP (FIG. 4). The opening OP that constitutes the outlet 20 may be configured by tearing a perforation (intermittent cut) M (FIG. 3).

[0052] The shape of the opening OP constituting the outlet 20 is not particularly limited, and may be a straight line, a long and narrow rectangle, an ellipse, a gourd shape, a dumbbell shape, or the like in a plan view.

[0053] The length (length in the X direction) of the outlet 20 (opening OP) is not particularly limited, but is preferably 80 mm or more and 140 mm or less, more preferably 90 mm or more and 130 mm or less, and even more preferably 100 mm or more and 120 mm or less.

[0054] The ratio of the length (length in the X-direction) of the outlet (opening OP) to the length (length in the X-direction) of the top surface 11 of the packaging bag 10 is not particularly limited, but is preferably 30% or more and 90% or less, more preferably 40% or more and 80% or less, and even more preferably 50% or more and 70% or less.

[0055] The width (length in the Y direction) of the outlet 20 (opening OP) is not particularly limited, but is preferably 5 mm or more and 30 mm or less, more preferably 10 mm or more and 25 mm or less, and even more preferably 15 mm or more and 20 mm or less.

[0056] The ratio of the width (length in the Y direction) of the outlet (opening OP) to the width (length in the Y direction) of the top surface 11 of the packaging bag 10 is not particularly limited, but is preferably 5% or more and 45% or less, more preferably 10% or more and 35% or less, and even more preferably 15% or more and 30% or less.

[0057] The packaging bag 10 is made of a resin film. The resin film constituting the packaging bag 10 is flexible. The resin used for the resin film is not particularly limited, and for example, resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), etc. can be used. As the polyethylene, high density polyethylene, low density polyethylene, etc. can be used.

[0058] Among these, polyethylene, polypropylene, polyethylene terephthalate, etc. are preferred because they are flexible, easy to handle, have high sealability when heat sealed, and are inexpensive. Polyethylene is also preferred because it is odorless, has excellent water resistance and chemical resistance, and can be mass-produced at low cost. Polypropylene is also preferred because it is robust, easy to mold, has good color development when printed, and can be given a glossy finish.

[0059] The materials used to form the packaging bag 10 can be biodegradable materials (biodegradable plastics such as polylactic acid) or biomass materials (renewable organic resources derived from living organisms, such as biomass films, excluding fossil resources).

[0060] The form of the resin film forming the packaging bag 10 is not particularly limited, and may be a single-layer film formed of a single layer of the above-mentioned resin, a laminate film in which the above-mentioned resin is laminated, a film in which the above-mentioned resin is bonded or laminated with pulp paper or nonwoven fabric, or a mixed film formed from a mixture of two or more of the above-mentioned resins.

[0061] The thickness of the resin film forming the packaging bag 10 is not particularly limited and is preferably 20 μm to 100 μm, more preferably 25 μm to 70 μm, and even more preferably 30 μm to 50 μm. By making the thickness of the resin film 20 μm or more, sufficient strength for the packaging bag 10 in which the sheet is contained can be ensured, and by making the thickness 100 μm or less, the softness and lightness of the packaging bag 10 can be ensured and costs can be reduced.

[0062] The packaging form of the packaging bag 10 is not particularly limited. In this embodiment, for example, packaging in which both ends of a cylindrical resin film are folded and sealed (caramel packaging), packaging in which both ends or either one of the ends of a cylindrical resin film folded in a gusset shape are sealed (pillow packaging), packaging in which a heat-shrinkable resin film is heated and adhered to the packaged object (shrink packaging), or a combination of these may be used. Among these, caramel packaging is preferred because it is easy to control the compaction of the sheet laminate SL (see FIG. 1).

[0063] In caramel packaging, the sheet laminate SL is wrapped in a resin film by rolling it into a cylinder with both ends in the longitudinal direction (X direction) open, and the overlapping parts in the rolling direction are bonded by fusion processing or adhesive. Next, both ends in the longitudinal direction (X direction) of the cylindrical resin film are folded toward the end face side of the sheet laminate SL, and at least the leading edge portions of the approximately triangular or approximately trapezoidal pieces formed in this process are overlapped and bonded by fusion processing or adhesive to seal the opening of the cylinder. In this embodiment, both ends of the cylindrical resin film (sides 15, 16 of the packaging bag 10) are folded and sealed (see FIG. 1).

[0064] In the sheet packaging body 100, the sheet laminate SL is contained in a packaging bag 10 in a tightened state. Specifically, the sheet laminate SL is subjected to compaction (compression) so that the volume of the sheet packaging body 100 is smaller than the volume of the sheet laminate SL before being contained in the packaging bag 10.

[0065] In this case, the compression work WC in the thickness direction (Z direction) of the sheet S is 110 gf cm / cm 2 More than 180gf cm / cm 2 Less than or equal to 115gf cm / cm 2 More than 170gf cm / cm 2 Less than or equal to 120 gf cm / cm 2 More than 160gf cm / cm 2 It is adjusted as follows:

[0066] Here, the compression work WC in the thickness direction (Z direction) of the sheet S was measured using a compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.) by placing the sheet wrapping body 100 so that the lamination direction of the sheet laminate SL was perpendicular to the ground and attaching a terminal T (contact area 2.0 cm2) to the top surface of the sheet wrapping body 100. 2 ) was placed in contact with the sample (Fig. 1) under a load of 500gf / cm 2 The compression work WC when a load of 100 mm is applied is shown.

[0067] In addition, the compaction is adjusted so that the ratio of the compression work WC to the thickness of the resin film constituting the packaging bag 10 (hereinafter referred to as "compression work WC / resin film thickness") is preferably 2.8 or more and 4.5 or less, more preferably 2.9 or more and 4.2 or less, and even more preferably 3.0 or more and 4.0 or less.

[0068] In addition, the compaction is adjusted so that the ratio of the compression work WC to the height H1 of the sheet packaging body 100 (the height of the packaging bag 10 in which the sheet laminate SL is contained) (Z direction) (hereinafter referred to as "compression work WC / height of sheet packaging body") is preferably 1.8 or more and 3.4 or less, more preferably 1.9 or more and 3.3 or less, and even more preferably 2.0 or more and 3.2 or less.

[0069] Furthermore, the compaction is adjusted so that the ratio of the compression work WC to the height H2 of the sheet stack (hereinafter referred to as "compression work WC / height of the sheet stack") is preferably 1.8 or more and 3.2 or less, more preferably 1.9 or more and 3.1 or less, and even more preferably 2.0 or more and 3.0 or less.

[0070] In the sheet packaging body 100 of this embodiment, the dry tensile strength of the sheet S in the CD direction is 100 cN or more and 170 cN or less, and the compression work load WC of the sheet S in the thickness direction (Z direction) is 110 gf cm / cm 2 More than 180gf cm / cm 2 By being equal to or less than this, even if the sheet laminate SL is contained in the packaging bag 10 in a tightened state, the sheet S is unlikely to be crushed, and the sheet S is unlikely to get clogged when removed. Therefore, in this embodiment, even if the sheet packaging body 100 is made compact, the softness of the sheet S is maintained, and a decrease in the ease of removal of the sheet S can be suppressed.

[0071] In the sheet wrapping body 100 of this embodiment, by setting the "compression work load WC / resin film thickness" to 2.8 or more and 4.5 or less, clogging of the sheet S during removal can be further suppressed. Therefore, in this embodiment, even if the sheet wrapping body 100 is made compact, the softness of the sheet S can be maintained and a decrease in the ease of removal of the sheet S can be suppressed.

[0072] In the sheet wrapping body 100 of this embodiment, by setting "compression work load WC / height of sheet wrapping body" to 1.8 or more and 3.4 or less, clogging of the sheet S during removal can be further suppressed. Therefore, in this embodiment, even if the sheet wrapping body 100 is made compact, the softness of the sheet S can be maintained and a decrease in the ease of removal of the sheet S can be suppressed.

[0073] In the sheet wrapping body 100 of this embodiment, by setting "compression work load WC / height of sheet stack" to 1.8 or more and 3.2 or less, clogging of the sheet S during removal can be further suppressed. Therefore, in this embodiment, even if the sheet wrapping body 100 is made compact, the softness of the sheet S can be maintained and a decrease in the ease of removal of the sheet S can be suppressed.

[0074] In the sheet packaging body 100 of this embodiment, the hand feel value HF of the sheet S measured by the softness measuring device TSA is 60 or more, so that the feel of the sheet S can be maintained even if the sheet packaging body 100 is made compact.

[0075] In the sheet packaging body 100 of this embodiment, the softness peak TS7 of the sheet S measured by the softness measuring device TSA is 15 or less, so that the softness of the sheet S can be maintained even if the sheet packaging body 100 is made compact.

[0076] In the sheet packaging body 100 of this embodiment, the smoothness peak TS750 measured by the softness measuring device TSA of the sheet S is 15 or less, so that the smoothness of the sheet S can be maintained even if the sheet packaging body 100 is made compact. EXAMPLES

[0077] The present invention will be described in more detail below with reference to examples. The evaluations of the examples and comparative examples were carried out under the following conditions. The conditions and evaluation results of Examples 1 to 4 and Comparative Examples 1 to 4 are shown below and in Table 1.

[0078] [Sheet packaging (individually wrapped)] The sheet laminate SL (web) is a web (sheet laminate) in which non-moisturizing tissue paper is folded alternately and stacked so that it can be pulled out one set at a time in a pop-up style. Individually packaged bodies (sheet packages) are caramel-packaged in individual packaging films (packaging bags) made of polyethylene laminate film with a thickness of approximately 40 μm and with an outlet (dumbbell-shaped perforations) formed on the top surface 11 (see Figures 1 to 3).

[0079] [Dry tensile strength] The dry tensile strength of tissue paper contained in individual packages was measured in accordance with the provisions of JIS P 8113 (2006). The tissue paper was cut to a width of approximately 25 mm (±0.5 mm) x length of approximately 150 mm in both the longitudinal direction (MD) and transverse direction (CD). The test machine used was a tension and compression test machine (TG-200N, manufactured by Minebea). The measurement was performed by setting the gripping distance to 100 mm, clamping both ends of the test piece to the grips of the test machine, applying a tensile load in the vertical direction to the tissue paper piece, and reading the indicated value (digital value) when the tissue paper broke. The tensile speed was 100 mm / min in the longitudinal direction and 100 mm / min in the transverse direction. Transverse direction: 50 mm / min. Five sets of samples were prepared in each of the longitudinal and transverse directions, and measurements were taken five times each, and the average of the measurements was taken as the dry tensile strength in each direction. The aspect ratio was calculated as the ratio of the tensile strength in the longitudinal direction to the transverse direction.

[0080] [Compression work volume WC] Using a compression tester (Kato Tech, KES-G5), under the following conditions, the sheet wrapping body 100 was placed so that the lamination direction of the sheet laminate SL was perpendicular to the ground, and a terminal T (contact area 2.0 cm 2 ) was attached to the upper surface of the sheet wrapping body 100. 2 ) was placed in contact with the sample (Fig. 1) under a load of 500gf / cm 2 The compression work WC when a load of 100 mm was applied was measured. Sample: Cloth, film, etc. SENS:10 Force gauge type: 1kg SPEED RANGE: 0.1cm / s DEF Sensitivity: 20mm / 10V Pressurized area: 2cm 2 Capture interval: 0.1 sec Measurement load: 10 Maximum load: 500gf / cm 2

[0081] [Compression work volume WC / resin film thickness] From the obtained compression work WC, the ratio of the compression work WC to the thickness of the resin film (individual packaging film) constituting the packaging bag (compression work WC / resin film thickness) was calculated.

[0082] [Compression work load WC / sheet package height] From the obtained compression work WC, the ratio of the compression work WC to the height of the sheet packaging (individually packaged body) (the height of the packaging bag containing the sheet laminate) (compression work WC / height of the sheet packaging) was calculated.

[0083] [Compression work load WC / sheet stack height] From the obtained compression work WC, the ratio of the compression work WC to the height of the sheet laminate (web) (compression work WC / height of sheet laminate) was calculated.

[0084] [Removal resistance (ejection ability)] The individual package (sheet package) was set in a precision universal testing machine (Shimadzu Corporation, Autograph AG-X), the bottom of the individual package was fixed so that it would not move, and the sheet was pulled up in the vertical direction (P direction) at a speed of 500 mm / min, and the maximum resistance value (removal resistance value) required until the sheet was pulled out of the individual package was measured (Fig. 4). The removal resistance value was calculated as the average value of 10 measurements from the 2nd to 10th sets (removal resistance F1 value) and the average value of 10 measurements from the 2nd to 5th sets (removal resistance F2 value). The removal property was evaluated as good when the removal resistance F1 value was less than 2.7 and the removal resistance F2 value was less than 2.5, and as poor when the removal resistance F1 value was 2.7 or more and the removal resistance F2 value was 2.5 or more.

[0085] [TSA measurement / HF value] Using a tissue softness measuring device (TSA (Tissue Softness Analyzer) manufactured by Emtec Electronic), the hand feel value HF (HF value) of the sheet S after it was removed from the sheet packaging body 100 was measured. The TSA measurement was performed in a constant temperature and humidity environment (temperature 23°C, humidity 50%). When the HF value was 60 or more, the touch of the sheet S was evaluated as good, and when it was less than 60, the touch of the sheet S was evaluated as poor.

[0086] [TSA measurement / Softness peak TS7] Using a tissue softness measuring device (TSA (Tissue Softness Analyzer) manufactured by Emtec Electronic), the softness peak TS7 of the sheet S after it was removed from the sheet packaging body 100 was measured. The TSA measurement was performed in a constant temperature and humidity environment (temperature 23°C, humidity 50%). When the softness peak TS7 was 15 or less, the sheet S was evaluated as soft, and when it exceeded 15, the sheet S was evaluated as hard.

[0087] [TSA measurement / Smoothness Peak TS750] Using a tissue softness measuring device (TSA (Tissue Softness Analyzer) manufactured by Emtec Electronic), the smoothness peak TS750 of the sheet S after it was removed from the sheet packaging body 100 was measured. The TSA measurement was performed in a constant temperature and humidity environment (temperature 23°C, humidity 50%). When the smoothness peak TS750 was 15 or less, the sheet S was evaluated as smooth, and when it exceeded 15, the sheet S was evaluated as rough (rough).

[0088] [Table 1]

[0089] From Table 1, the dry tensile strength in the CD direction of the sheet is 100cN or more and 170cN or less, and the compression work in the thickness direction of the sheet WC is 110gf cm / cm 2 More than 180gf cm / cm 2 It was found that the following sheet packages maintained the softness of the sheets even when compacted, and were less likely to be impaired in terms of ease of removal (Examples 1 to 4).

[0090] On the other hand, when the dry tensile strength in the CD direction of the sheet is between 100cN and 170cN, and the compression work in the thickness direction of the sheet is 110gf cm / cm 2 More than 180gf cm / cm 2 It was found that when a sheet package that does not satisfy at least one of the following conditions is compacted, the sheet becomes hard or the ease of removal of the sheet decreases (Comparative Examples 1 to 4).

[0091] Although an embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and changes are possible within the scope of the invention described in the claims. [Explanation of symbols]

[0092] 100 Sheet packaging S Seat SL Sheet laminate LT Top LB bottom LL long side LS short side 10 packaging bags 11 Top 12 Bottom 13 Long side 14 Long side 15 short side 16 short side H1 Height of sheet packaging H2 Height of the sheet stack 20 Outlet M Perforation OP Opening T terminal P vertical direction

Claims

1. A sheet package comprising a rectangular parallelepiped sheet stack in which a plurality of tissue papers are stacked, a film packaging bag for containing the sheet stack, and an outlet formed on the top surface of the packaging bag for pulling out the tissue paper, The sheet stack is formed by stacking the tissue papers so that the long sides of the sheet stack are irregular. The sheet wrapping body is contained in the packaging bag in a state where the sheet stack is fastened in a direction in which the misaligned long sides face each other, The tissue paper has a basis weight of 10 g / m ２ 14g / m or more ２ is as follows: The thickness of the tissue paper is 110 μm or more and 200 μm or less, The dry tensile strength of the tissue paper in the CD direction is 110 cN or more and 155 cN or less; The compression work WC of the sheet packaging body when the sheet packaging body is placed so that the stacking direction of the sheet stack is perpendicular to the ground is 120 gf cm / cm ２ More than 150gf・cm / cm ２ The following is a sheet packaging body.

2. The sheet packaging body according to claim 1 , wherein a ratio of the compression work load WC to a thickness of a film constituting the packaging bag is 2.8 or more and 4.5 or less.

3. The sheet packaging body according to claim 1 , wherein a ratio of the compression work load WC to a height of the sheet packaging body is 1.8 or more and 3.4 or less.

4. The sheet packaging body according to claim 1 , wherein a ratio of the compression work load WC to a height of the sheet stack is 1.8 or more and 3.2 or less.

5. 2. The sheet packaging body according to claim 1, wherein the hand feel value HF of the tissue paper measured by a softness measuring device TSA is 60 or more.

6. 2. The sheet packaging body according to claim 1, wherein the tissue paper has a softness peak TS7 of 15 or less as measured by a softness measuring device TSA.

7. 2. The sheet packaging body according to claim 1, wherein the tissue paper has a smoothness peak TS750 of 15 or less as measured by a softness measuring device TSA.

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