Paper product package

Abstract

To provide a paper product package capable of being tightly packaged with excellent formability of the package, even when a packaging form is pillow-packaging or gusset-packaging, and comprises a high-capacity paper product package having a large number of tissue paper sets.SOLUTION: A paper product package in which a paper product is covered with a packaging base material including a film base material, the paper product is sealed by a seal part, and the packaging form is pillow-packaging or gusset-packaging: the paper product is a tissue paper laminate obtained by laminating 150 or more sets and at most 250 sets of paper tissue; the tissue paper laminate has a height of 25 mm or more and 60 mm or less; the packaging base material has a thickness of 25 μm or more and 85 μm or less; a peripheral length ratio (=l / L) is 80% or more and 115% or less, when a peripheral length in a shorter-side direction of the packaging base material is represented by L, and a peripheral length in a shorter-side direction of the tissue paper laminate is represented by l; and a value of (A / B×100) is 110 or more and 410 or less.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a paper product package for tissue paper.

Background Art

[0002] Tissue paper such as facial tissue is usually sold in a form where a plurality of sheets are stacked and packaged. Such sales packages of tissue paper include, in addition to box-shaped cartons made of rigid paper, soft packs made of soft paper or plastic films, and such soft packs are convenient to carry.

[0003] As packaging forms for soft packs of tissue paper, caramel packaging and pillow packaging are often used.

[0004] As a package of tissue paper by caramel packaging, for example, Patent Document 1 discloses a sheet laminate in which a plurality of moisture-retaining sheets are laminated, and a packaging bag for packaging the sheet laminate, and the sheet laminate is housed in the packaging bag in a state of being compressed at a compression rate of 50% or more and 80% or less in the lamination direction. Also described is that the sheet laminate is caramel-packaged.

[0005] Caramel packaging has a good form (appearance) of the package and tight packaging. Therefore, when opening the perforation at the outlet of the package, the package can be firmly held by hand, so it is easy to open the perforation. Also, since the side surface is adhered with a width equal to the height of the tissue paper laminate which is the contents, even when the number of sheets of the tissue paper laminate is large, it can be tightly packaged while maintaining the form.

[0006] However, caramel packaging is difficult to package. Specifically, unless the height of the laminate of tissue paper becomes somewhat constant, the heat seal during packaging is not stable. Therefore, due to the difference in the height of the laminate between the upper roll and the lower roll of the raw fabric, defective products are likely to occur during packaging depending on the raw fabric.

[0007] On the one hand, as a wrapper for tissue paper by pillow packaging, for example, Patent Document 2 discloses a pillow packaging bag that houses a plurality of laminated sheets and has a pair of seal portions at both ends in the longitudinal direction, and an outlet formed on the upper surface of the pillow packaging bag and extending in the longitudinal direction of the pillow packaging bag. The pillow packaging bag has a paper layer containing a paper component and a resin layer containing a thermoplastic resin provided on at least one surface of the paper layer, the ratio of the paper component is 50% or more, and when the ply number of the sheet is 1 ply, the length of the outlet is 80% or more and 100% or less with respect to the distance between the pair of seal portions in the longitudinal direction of the upper surface, and when the ply number of the sheet is 2 plies or more, the length of the outlet is 70% or more and 90% or less with respect to the distance between the pair of seal portions in the longitudinal direction of the upper surface. A sheet wrapper is disclosed.

[0008] Compared with caramel packaging, pillow packaging and gusset packaging are easier to package but inferior in the formability of the package. Furthermore, in the case of a large-capacity product with a large number of laminated tissue paper sheets, the pack is likely to bulge, so it is difficult to tightly package while maintaining the formability.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0010] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a paper product wrapper that has a packaging form of pillow packaging or gusset packaging and can be tightly packaged with good formability even for a large-capacity paper product wrapper with a large number of tissue papers.

Means for Solving the Problems

[0011] The inventor has conducted intensive studies and found that in a packaging substrate including a film substrate, where a paper product is covered and sealed by a seal portion, by defining the number of tissue paper layers of the paper product, the height of the tissue paper laminate, the thickness of the packaging substrate, the perimeter ratio of the perimeter in the short direction of the packaging substrate to the perimeter in the short direction of the tissue paper laminate, and the ratio of the thickness of the packaging substrate to the perimeter ratio, a paper product package can be obtained with good formability and capable of tight packaging, thus solving the above problems and completing the present invention. That is, the present invention provides the following.

[0012] (1) The first aspect of the present invention is a paper product package in which a paper product is covered with a packaging substrate including a film substrate and sealed by a seal portion, wherein the paper product is a tissue paper laminate formed by laminating 150 or more and 250 or less layers of tissue paper, the height of the tissue paper laminate is 25 mm or more and 60 mm or less, the thickness of the packaging substrate is 25 μm or more and 85 μm or less, when the perimeter in the short direction of the packaging substrate is defined as L and the perimeter in the short direction of the tissue paper laminate is defined as l, the perimeter ratio (= l / L) is 80% or more and 115% or less, and when the thickness of the packaging substrate is defined as B and the perimeter ratio is defined as A, the value of (A / B × 100) is 110 or more and 410 or less.

[0013] (2) The second aspect of the present invention is the paper product package according to (1), wherein the basis weight of the packaging substrate is 22 g / m 2 or more and 77 g / m 2 or less.

[0014] (3) The third aspect of the present invention is the paper product package according to (1), wherein the perimeter in the short direction of the packaging substrate is 200 mm or more and 400 mm or less.

[0015] (4) The fourth aspect of the present invention is the paper product package according to (1), wherein the perimeter in the short direction of the tissue paper laminate is 190 mm or more and 390 mm or less.

[0016] (5) The fifth aspect of the present invention is the paper product package described in (1), characterized in that the length of the tissue laminate in the longitudinal direction is 150 mm or more and 190 mm or less.

[0017] (6) The sixth aspect of the present invention is the paper product package described in (1), characterized in that the length of the tissue laminate in the short - hand direction is 80 mm or more and 130 mm or less.

[0018] (7) The seventh aspect of the present invention is the paper product package described in (1), characterized in that the basis weight of the tissue paper is 10.0 g / m 2 or more and 12.5 g / m 2 or less.

[0019] (8) The eighth aspect of the present invention is the paper product package described in (1), characterized in that the paper thickness of the tissue paper is 0.3 mm / 10 plies or more and 0.9 mm / 10 plies or less.

[0020] (9) The ninth aspect of the present invention is the paper product package described in (1), characterized in that the specific volume of the tissue paper is 3.0 cm 3 / g or more and 7.2 cm 3 / g or less.

[0021] (10) The tenth aspect of the present invention is the paper product package described in (1), characterized in that the density of the tissue laminate is 0.14 g / cm 3 or more and 0.28 g / cm 3 or less.

[0022] (11) The eleventh aspect of the present invention is the paper product package described in (1), characterized in that the packaging form is a pillow package.

[0023] (12) The twelfth aspect of the present invention is the paper product package described in (1), characterized in that the packaging form is a gusset package.

[0024] (13) The 13th aspect of the present invention is a paper product collective package in which three or more and eight or fewer packages are stored in a gusset packaging bag, wherein the package is the paper product package according to any one of (1) to (12), the longitudinal direction of the package is arranged substantially parallel to the vertical direction of the gusset packaging bag, the top surface of the package where the take-out opening of the package is formed and the bottom surface of the package adjacent to the package are opposed to each other and arranged in the left-right direction of the gusset packaging bag, and one side surface in the longitudinal direction of the package is opposed to the top surface of the gusset packaging bag, and the other side surface in the longitudinal direction of the package is opposed to the bottom surface of the gusset packaging bag, respectively. It is a paper product collective package characterized by being arranged.

Effect of the Invention

[0025] According to the present invention, it is possible to provide a paper product package that has good formability of the package and can be tightly packaged even in the case of a large-capacity paper product package made of tissue paper with a large number of sets.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0027] Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. These are presented for illustrative purposes and do not limit the present invention.

[0028] In this specification, formability means that the package is maintained in a substantially rectangular parallelepiped shape without being affected by the inner tissue laminate. The formability is good if each surface of the package is maintained in a substantially rectangular parallelepiped shape without bulging due to reasons such as a large number of sets of the inner tissue laminate. Tightness means that the package is appropriately sized for the inner tissue laminate. The tightness is good if the package does not collapse or the inner tissue laminate does not move significantly within the package. Also, the MD direction and the CD direction respectively mean the manufacturing line direction (conveying direction) and the direction orthogonal to the manufacturing line direction during the manufacture of the paper product package.

[0029] <Paper product package> FIG. 1 is a perspective view showing an example of the paper product package 1 (hereinafter also simply referred to as "package") and the tissue laminate 11 of the present invention. The paper product package 1 of the present invention is a packaging substrate 10 containing at least a film substrate, and is covered with a tissue laminate (hereinafter also simply referred to as "laminate") 11 in which tissue paper (hereinafter also referred to as "tissue") 21 is laminated, and the tissue laminate 11 is sealed by a seal portion 12. The seal portion 12 is preferably provided at the overlapping end of the packaging substrate 10. At this time, as shown in FIG. 1, the seal portion 12 is preferably formed in a substantially straight line at a position about 10 mm from each of the both ends of the package 1, and the seal portions 12 are substantially parallel to each other. However, as long as the sealing property (adhesiveness of the seal portion 12) of the package 1 can be ensured, it may be formed at other positions. The pattern of the seal portion is not particularly limited, such as dotted line, lattice, or a plurality of straight lines.

[0030] As shown in Fig. 2, the package 1 preferably includes a take-out opening 14 for taking out the tissue paper 21. This take-out opening 14 is preferably formed by cutting the perforation 13, a single-line perforation for forming the take-out opening 14 of the tissue paper 21, in the packaging base material 10 and opening it during use. As shown in Fig. 2, by sequentially pulling out (taking out) the tissue paper 21 from the formed take-out opening 14, the required number of sheets of the tissue paper 21 can be obtained. Note that as long as the tissue paper 21 can be pulled out, the perforation 13 formed in the take-out opening 14 is not limited to a single line.

[0031] The perforation 13 is preferably provided on the surface of the packaging base material 10 that covers the upper part of the laminate 11 so as to be substantially parallel to one side of the tissue paper 21. Also, it is preferably provided so as to be disposed above the central portion of the laminate 11. Note that as long as the tissue paper 21 can be pulled out, the perforation 13 formed in the take-out opening 14 is not limited to a single line.

[0032] <Packaging base material> The packaging base material 10 includes at least a film base material. Also, it is preferably that the packaging base material 10 does not contain paper, and it is preferably that the packaging base material 10 has printing. Note that the basis weight value described later is a value including the printing ink. Preferably, it contains 90% by weight or more of the film base material, and more preferably, it contains 95% by weight or more of the film base material.

[0033] When the package 1 is a gusset package, the packaging base material 10 is preferably a tube type (that is, when the packaging base material 10 contains only the film base material, it is a tube type film). The tube type film is a film formed by forming a sheet-like film into a cylindrical shape like a tube. When the individual package 1 is a pillow package, since the packaging base material 10 wraps and seals the tissue paper laminate 11 while being formed into a cylindrical shape, the packaging base material 10 is preferably of the original roll film (flat original roll) type.

[0034] (Film base material) The film constituting the film substrate may be formed as a single layer or as multiple layers. The material of the film can be used without particular limitation as a plastic (thermoplastic resin) film used when packaging ordinary paper products, and surface treatment may also be performed. Examples of the material of the plastic film include conventionally known thermoplastic resins such as polyolefin (such as polyethylene and polypropylene), polyester (such as PET), polyamide (such as nylon), polycarbonate, polystyrene, and polyvinyl chloride. Polyethylene is preferred.

[0035] As a specific configuration, when the film substrate is formed as a single layer, LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), CPP (cast polypropylene), or a film obtained by blending and mixing these materials is preferred. Also, a multilayer film in which a different material is laminated, coated, or made into multiple layers on these films may be used. Examples of the different material include OPP (oriented polypropylene), EVOH (ethylene-vinyl alcohol copolymer), Ny (nylon), PET (polyethylene terephthalate), PVDC (polyvinylidene chloride), etc. Among these, LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), and HDPE (high-density polyethylene) are preferred. By using PE, it becomes easier to maintain the formability of the package.

[0036] In addition, the packaging substrate 10 of the present invention may include other layers in addition to the film substrate. Examples of other layers include a water vapor barrier layer, an oxygen barrier layer, a printing layer, a printing suitability improvement layer, an overprint layer, a light-shielding layer, etc. These other layers can be provided, for example, on the surface in contact with the tissue paper 21 or on the surface in contact with the outside air, and may be a single layer or two or more layers.

[0037] (Thickness (B) of the packaging substrate) The thickness of the packaging base material 10 (hereinafter also referred to as "B") is 25 μm or more and 85 μm or less. If the thickness is less than 25 μm, the packaging base material 10 lacks tension and has poor tightness. If it exceeds 85 μm, the packaging base material 10 is too tense and has poor formability. The lower limit value of the thickness of the packaging base material 10 is preferably 40 μm or more, more preferably 50 μm or more. The upper limit value is preferably 75 μm or less, more preferably 65 μm or less. The thickness of the packaging base material 10 can be measured in accordance with JIS K7130.

[0038] (Grammage of the packaging base material) The grammage of the packaging base material 10 is 22 g / m 2 or more and 77 g / m 2 or less is preferable. If the thickness is less than 22 g / m 2 , the packaging base material 10 lacks tension and has poor tightness. If it exceeds 77 g / m 2 , the packaging base material 10 is too tense and has poor formability. The lower limit value of the grammage of the packaging base material 10 is more preferably 36 g / m 2 or more, even more preferably 45 g / m 2 or more. The upper limit value is more preferably 68 g / m 2 or less, even more preferably 59 g / m 2 or less. The grammage of the packaging base material 10 can be measured in accordance with JIS P 8124.

[0039] (Perimeter (L) of the packaging base material in the short side direction) The perimeter of the packaging base material 10 in the short side direction (hereinafter also referred to as "L") is preferably 200 mm or more and 400 mm or less. If the perimeter (L) in the short side direction is less than 200 mm, the paper product package 1 bulges tightly and has poor formability. If it exceeds 400 mm, the paper product package 1 becomes loose and has poor tightness. The lower limit value of the perimeter (L) in the short side direction is more preferably 230 mm or more, even more preferably 250 mm or more. The upper limit value is more preferably 370 mm or less, even more preferably 350 mm or less.

[0040] The perimeter (L) in the short side direction of the packaging base material 10 can be measured with a ruler after cutting the packaging base material 10 of the paper product package 1 and gently taking out the tissue laminate 11. When the individual tissue package 1 is in a pillow package, the length of the overlapping part of the films at the heat seal part is not included.

[0041] <Tissue laminate> FIG. 3 is a perspective view showing an example of the tissue laminate 11 packaged in the paper product package 1 of the present invention. Hereinafter, the tissue paper 21 and the tissue laminate 11 will be described in detail.

[0042] The tissue paper 21 included in the tissue laminate 11 is a soft tissue paper using tissue paper. The tissue paper 21 may be 1 ply or 2 plies, but 2 plies is preferred.

[0043] The folding method of the tissue paper 21 included in the tissue laminate 11 is not particularly limited, but it is preferably V-folded and laminated. By being V-folded, the upper and lower parts of the tissue laminate 11 can be made into a paper product package 1 that is difficult to turn up during packaging. The processing machine used for V-folding may be either an interfolder or a multi-stand type interfolder, but a multi-stand type interfolder is preferred.

[0044] (Grammage of tissue paper) The grammage per ply of the tissue paper 21 is preferably 10.0 g / m 2 or more and 12.5 g / m 2 or less. If the grammage is less than 10.0 g / m 2 , the height of the tissue laminate 11 becomes low and the tightness of the paper product package 1 is inferior. If the grammage exceeds 12.5 g / m 2 , the height of the tissue laminate 11 becomes high and the formability of the paper product package 1 is inferior. The lower limit value of the grammage is more preferably 10.3 g / m 2 or more, and even more preferably 10.5 g / m 2 or more. The upper limit value is more preferably 11.5 g / m 2 or less, and even more preferably 11.0 g / m 2The following is more preferable. The basis weight per ply of the tissue paper 21 is measured in accordance with JIS P 8124.

[0045] (Paper thickness of the tissue paper) The paper thickness of the tissue paper 21 is preferably 0.3 mm / 10 plies or more and 0.9 mm / 10 plies or less. If the paper thickness is less than 0.3 mm / 10 plies, the height of the tissue paper laminate 11 will be low and the tightness of the paper product package 1 will be poor. If the paper thickness exceeds 0.9 mm / 10 plies, the height of the tissue paper laminate 11 will be high and the formability of the paper product package 1 will be poor. The lower limit value of the paper thickness is more preferably 0.4 mm / 10 plies or more, and even more preferably 0.5 mm / 10 plies or more. The upper limit value is more preferably 0.8 mm / 10 plies or less, and even more preferably 0.7 mm / 10 plies or less.

[0046] Note that the (10-ply) paper thickness of the tissue paper 21 is measured using a thickness gauge (dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa and a measuring head diameter of 30 mm. A sample is placed between the measuring head and the measuring table, and the gauge is read when the measuring head is lowered at a speed of 1 mm or less per second. When the tissue paper 21 is 2 plies, five sets of 2-ply tissue paper 21 are stacked and measured as 10 plies, and the measured value is calculated as the 10-ply paper thickness. Also, the measurement is repeated 10 times (not measuring the same location 10 times, but measuring 10 different locations), and the average of the measurement results is taken as the final paper thickness.

[0047] (Specific volume of the tissue paper) The specific volume of the tissue paper 21 is preferably 3.0 cm 3 / g or more and 7.2 cm 3 / g or less. If the specific volume is less than 3.0 cm 3 / g, the height of the tissue paper laminate 11 will be low and the tightness of the paper product package 1 will be poor. If the specific volume exceeds 7.2 cm 3 / g, the height of the tissue paper laminate 11 will be high and the formability of the paper product package 1 will be poor. The lower limit value of the specific volume is more preferably 4.2 cm 3 / g or more, and even more preferably 5.0 cm 3More preferably, it is above / g. The upper limit value is 7.0 cm 3 More preferably, it is below / g, and more preferably 6.4 cm 3 / g or less. The specific volume of the tissue paper 21 is obtained by dividing the paper thickness of the tissue paper 21 by the basis weight, and is the volume cm per unit g 3 expressed in

[0048] (Number of sets of tissue paper laminate) When the tissue paper 21 is 2-ply, the number of sets of the tissue paper 21 included in the tissue paper laminate 11 is 150 sets or more and 250 sets or less. If the number of sets is less than 150 sets, the height of the tissue paper laminate 11 becomes low and the tightness of the paper product package 1 is poor. If the number of sets exceeds 250 sets, the height of the tissue paper laminate 11 becomes high and the formability of the paper product package 1 is poor. The lower limit value of the number of sets of the tissue paper 21 is preferably 170 sets or more, more preferably 190 sets or more. The upper limit value is preferably 230 sets or less, more preferably 210 sets or less.

[0049] (Height of tissue paper laminate) The height of the tissue paper laminate 11 is 25 mm or more and 60 mm or less. If the height is less than 25 mm, the height of the tissue paper laminate 11 becomes low and the tightness of the paper product package 1 is poor. If the height exceeds 60 mm, the height of the tissue paper laminate 11 becomes high and the formability of the paper product package 1 is poor. The lower limit value of the height of the tissue paper laminate 11 is preferably 30 mm or more, more preferably 35 mm or more. The upper limit value is preferably 50 mm or less, more preferably 45 mm or less.

[0050] The height of the tissue paper laminate 11 can be measured as follows. After cutting the packaging base material 10 of the paper product package 1 and gently taking out the tissue paper laminate 11, a 30 cm ruler (Straightedge Silver JIS 1st grade, stainless steel, 64 g, manufactured by Shinwa Measurement Co., Ltd.) is placed along the longitudinal direction of the laminate 11 at the center of the short side direction of the tissue paper laminate 11, and the heights of both ends of the laminate 11 are measured. Similarly, a 30 cm ruler is placed along the short side direction of the laminate 11 at the center of the longitudinal direction of the laminate 11, and the heights of both ends of the laminate 11 are measured. These four values are averaged to obtain the final height of the laminate.

[0051] (Length in the longitudinal direction of the thin paper laminate) The length in the longitudinal direction of the thin paper laminate 11 is preferably 150 mm or more and 190 mm or less. If the length in the longitudinal direction is less than 150 mm, the tightness of the paper product package 1 is poor, and if it exceeds 190 mm, the formability of the paper product package 1 is poor. The lower limit value of the length in the longitudinal direction is more preferably 155 mm or more, and even more preferably 160 mm or more. The upper limit value is more preferably 185 mm or less, and even more preferably 180 mm or less.

[0052] The length in the longitudinal direction of the thin paper laminate 11 can be measured as follows. Cut the packaging base material 10 of the paper product package 1 and gently take out the thin paper laminate 11. Place a 30 cm ruler (Straight Ruler Silver JIS Class 1, stainless steel, 64 g, manufactured by Shinwa Measuring Co., Ltd.) along the longitudinal direction at the center of the short side of the laminate 11, and measure the length of the top surface.

[0053] (Length in the short side direction of the thin paper laminate) The length in the short side direction of the thin paper laminate 11 is preferably 80 mm or more and 130 mm or less. If the length in the short side direction is less than 80 mm, the tightness of the paper product package 1 is poor, and if it exceeds 130 mm, the formability of the paper product package 1 is poor. The lower limit value of the length in the short side direction is more preferably 90 mm or more, and even more preferably 95 mm or more. The upper limit value is more preferably 120 mm or less, and even more preferably 115 mm or less.

[0054] The length in the short side direction of the thin paper laminate 11 can be measured as follows. Cut the packaging base material 10 of the paper product package 1 and gently take out the thin paper laminate 11. Place a 30 cm ruler (Straight Ruler Silver JIS Class 1, stainless steel, 64 g, manufactured by Shinwa Measuring Co., Ltd.) along the short side direction at the center of the longitudinal side of the laminate 11, and measure the length of the top surface.

[0055] (Perimeter (l) in the short side direction of the thin paper laminate) The perimeter in the short side direction of the tissue paper laminate 11 (hereinafter also referred to as "l") is preferably 190 mm or more and 390 mm or less. If the perimeter (l) in the short side direction is less than 190 mm, the paper product package 1 will become loose and the tightness will be poor. If it exceeds 390 mm, the paper product package 1 will bulge tightly and the formability will be poor. The lower limit value of the perimeter (l) in the short side direction is more preferably 230 mm or more, and even more preferably 250 mm or more. The upper limit value is more preferably 350 mm or less, and even more preferably 330 mm or less.

[0056] The perimeter (l) of the tissue paper laminate 11 can be measured as follows. Cut the packaging base material 10 of the paper product package 1 and gently take out the tissue paper laminate 11. Place a 30 cm ruler (Straightedge Silver JIS 1st grade, stainless steel, 64 g, manufactured by Shinwa Measurement Co., Ltd.) along the short side direction at the center in the longitudinal direction of the laminate 11, and obtain it according to the following from the length in the short side direction of the tissue paper laminate 11 described above and the height of the tissue paper laminate 11. The perimeter (l) of the tissue paper laminate 11 = (the length in the short side direction of the tissue paper laminate 11) × 2 + (the height of the tissue paper laminate) × 2

[0057] (Perimeter ratio (A)) The perimeter ratio (= perimeter (l) / perimeter (L) × 100 (%)) (hereinafter also referred to as "A") obtained by dividing the perimeter (l) in the short side direction of the tissue paper laminate 11 by the perimeter (L) in the short side direction of the packaging base material 10 is 80% or more and 115% or less. If the perimeter ratio (A) is less than 80%, the paper product package 1 will become loose and the tightness will be poor. If it exceeds 115%, the paper product package 1 will bulge tightly and the formability will be poor. The lower limit value of the perimeter ratio (A) is preferably 90% or more, and more preferably 95% or more. The upper limit value is preferably 110% or less, and more preferably 105% or less.

[0058] (Ratio of perimeter ratio A to thickness B of packaging base material) The value obtained by dividing the perimeter ratio (A) by the thickness (B) of the packaging base material (= perimeter ratio (A) / thickness (B) of the packaging base material) is 110 or more and 410 or less. If this value is less than 110, the paper product package 1 is loose and the packaging base material 10 has tension, so the tightness and formability of the paper product package 1 are inferior. If this value exceeds 410, the paper product package 1 is full and the packaging base material 10 has no tension, so the formability of the paper product package 1 is inferior. The lower limit value of (perimeter ratio (A) / thickness (B) of the packaging base material) is preferably 140 or more, more preferably 175 or more. The upper limit value is preferably 300 or less, more preferably 205 or less.

[0059] (Mass of the tissue paper laminate) The lower limit value of the mass of the tissue paper laminate 11 is preferably 100 g or more, more preferably 110 g or more, and still more preferably 125 g or more. The upper limit value is preferably 220 g or less, more preferably 200 g or less, and still more preferably 175 g or less. If the mass of the tissue paper laminate 11 is less than 100 g, the height of the tissue paper laminate 11 becomes low and the tightness of the paper product package 1 is inferior. If the mass of the tissue paper laminate 11 exceeds 220 g, the height of the tissue paper laminate 11 becomes high and the formability of the paper product package 1 is inferior. The mass of the tissue paper laminate 11 is measured by taking out the tissue paper laminate 11 from the paper product package 1 and measuring the mass of the tissue paper laminate 11 with an electronic balance after conditioning at 23 °C and 50%.

[0060] (Density of the tissue paper laminate) The density of the tissue paper laminate 11 is preferably 0.14 g / cm 3 or more and 0.28 g / cm 3 or less. If the density is less than 0.14 g / cm 3 , the paper product package 1 becomes loose and the tightness is inferior. If it exceeds 0.24 g / cm 3 , the paper product package 1 bulges out and the formability is inferior. The lower limit value of the density is more preferably 0.15 g / cm 3 or more, and still more preferably 0.17 g / cm 3 or more. The upper limit value is more preferably 0.26 g / cm 3 or less, and still more preferably 0.25 g / cm 3 or less.

[0061] The density of the thin paper laminate 11 is measured as follows. First, the thin paper laminate 11 is taken out from the paper product package 1, and the mass of the thin paper laminate 11 is measured with an electronic balance after conditioning at 23°C and 50%. Then, the height, the length in the longitudinal direction, and the length in the short transverse direction of the thin paper laminate 11 described above are measured with a ruler, and the density is calculated by the following formula. Density of the thin paper laminate (g / cm 3 ) = Mass of the thin paper laminate (g) / (Height of the thin paper laminate (cm) × Length in the longitudinal direction of the thin paper laminate (cm) × Length in the short transverse direction of the thin paper laminate (cm))

[0062] (Packaging form) As the packaging form of the paper product package 1 according to the present invention, it is a pillow packaging or a gusset packaging.

[0063] The pillow packaging is, as shown in FIG. 4, a packaging form in which the object to be packaged (thin paper laminate 11) placed on or under the sheet-like packaging base material 10 is wrapped cylindrically, the packaging base material 11 is overlapped with the inner surfaces at both ends in its width direction, the overlapped portion (12' in FIG. 4) is heat-sealed or the like to form a cylindrical shape, and the bottom portion or the mouth portion (12 in FIG. 4) corresponding to the length (height) of the bag is sealed in a horizontal line with heat-sealing or the like, and cut into individual bags at the sealed portion. This pillow packaging can be carried out using known devices.

[0064] Note that the pillow packaging includes a vertical pillow packaging in which the packaging base material is fed in the vertical direction and the object to be packaged is wrapped while being filled from above, and a horizontal pillow packaging in which the packaging base material is fed in the horizontal direction and the object to be packaged is wrapped. When packaging thin paper, horizontal pillow packaging is preferable in view of the packaging speed and the form of the thin paper.

[0065] (Gusset packaging) As shown in FIG. 5, a gusset packaging is formed in a cylindrical shape in which both ends of the bottom or the mouth portion are woven inward as mountain fold portions according to the length (height) of the bag. An object to be packaged (the thin paper laminate 11) is inserted into the inside of the packaging base material 10 sealed at one side by the seal portion 12 from the insertion port 15 and sealed in a horizontal line by heat sealing or the like. This gusset packaging is a packaging form in which it is cut into individual bags at the sealed portion. This gusset packaging can be performed using known devices. Further, the thin paper laminate 11 may be inserted in a state where the packaging base material 10 at the portion of the insertion port 15 is inverted to the outside so as not to be wound inside.

[0066] (Paper product collective package) As shown in FIG. 6, a plurality of the paper product packages 1 of the present invention can be collectively stored to form a paper product collective package 5. From the viewpoint of the size during transportation or carrying, it is preferable that 3 or more and 8 or less paper product packages 1 are stored.

[0067] As shown in FIG. 6, five paper product packages 1 are stored in parallel inside the gusset packaging bag 50 of the paper product collective package 5. Specifically, the longitudinal direction of the paper product package 1 is arranged substantially parallel to the vertical direction of the gusset packaging bag 50, and the top surface 16 of the paper product package 1 where the take-out port 14 of the paper product package 1 is formed and the bottom surface facing the top surface 16 of the paper product package 1 adjacent to the paper product package 1 are opposed to each other and arranged in the left-right direction of the gusset packaging bag 50. One side surface 17 in the longitudinal direction of the paper product package 1 is opposed to the top surface 51 of the gusset packaging bag 50, and the other side surface in the longitudinal direction of the paper product package 1 is opposed to the bottom surface 52 of the gusset packaging bag 50 and arranged and stored respectively.

[0068] Although the present invention has been described using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. Also, it is obvious from the description of the claims that forms with such changes or improvements can also be included in the technical scope of the present invention.

Example

[0069] Hereinafter, the present invention will be described in detail with reference to examples. Note that the present invention is not limited to the examples shown below.

[0070] <Example 1> (Packaging substrate) A single-layer polyethylene film was prepared as a film substrate and used as the packaging substrate as it was. The film was provided with printing. Table 1 shows the results of measuring the thickness (B) and basis weight of the packaging substrate.

[0071] (Paper product package) Using a film with a width of 260 mm × pitch of 265 mm (MD direction) as the packaging substrate, pillow packaging was performed. A tissue paper laminate in which 150 sets of tissue paper were laminated was placed in this film serving as the packaging substrate, and sealed by pillow packaging to obtain a paper product package. Note that the form was such that the paper product was wrapped with the film (packaging substrate). Also, after inserting the tissue paper laminate, the excess in the pitch direction was cut to produce the package. In the paper product package, after packaging, the perimeter L in the short side direction of the packaging substrate and the perimeter l in the short side direction of the tissue paper laminate were measured, the perimeter ratio (A) was calculated from the measured L and l, and further the value of (A / B×100) was calculated.

[0072] (Formability of paper product package) Regarding the produced paper product package, 30 monitors evaluated the formability. The evaluation criteria were as follows, and levels 1 to 3 were set as the passing levels. 1: 28 or more monitors evaluated that the formability was good 2: 25 or more and 27 or fewer monitors evaluated that the formability was good 3: 22 or more and 24 or fewer monitors evaluated that the formability was good 4: 21 or fewer monitors evaluated that the formability was good

[0073] (Tightness of paper product package) Regarding the produced paper product package, 30 monitors evaluated the tightness. The evaluation criteria were as follows, and levels 1 to 3 were set as the passing levels. 1: 28 or more monitors evaluated the tightness as good 2: 25 to 27 monitors evaluated the tightness as good 3: 22 to 24 monitors evaluated the tightness as good 4: 21 or fewer monitors evaluated the tightness as good

[0074] (Example 1) to (Example 17), (Comparative Example 1) to (Comparative Example 8) In the same manner as in Example 1, packaging base materials having the physical properties shown in Tables 1 and 2 were produced for Examples 2 to 17 and Comparative Examples 1 to 8, and using these, paper product packages were produced in the same manner as in Example 1, and the above evaluations were performed.

[0075]

Table 1

[0076]

Table 2

[0077] As is clear from the results shown in Tables 1 and 2, all of the paper product packages of Examples 1 to 17 were excellent in formability and also had good tightness. On the other hand, all of Comparative Examples 1 to 7 were inferior in formability or tightness.

Explanation of Signs

[0078] 1 Paper product package 10 Packaging base material 11 Tissue paper laminate 12 Seal part 12´ Seal part (center seal part during pillow packaging) 13 Perforation 14 Take-out opening 15 Insertion opening 16 Top surface of the paper product package 17 Longitudinal side surface of the paper product package 18 Lateral side surface of the paper product package 21 Tissue paper (tissue paper) 5 Paper product collective package 50 Gusset packaging bag 51 Top surface of gusset packaging bag 52 Bottom surface of gusset packaging bag

Claims

1. A paper product package in which a paper product is covered with a packaging substrate including a film substrate, and the paper product is sealed with a seal portion, The paper product is a tissue paper laminate having 150 to 250 sets of tissue paper laminated together, The height of the tissue paper laminate is 25 mm or more and 60 mm or less, The thickness of the packaging substrate is 25 μm or more and 85 μm or less, When the perimeter of the packaging base material in the short side direction is defined as L and the perimeter of the tissue paper laminate in the short side direction is defined as l, the perimeter ratio (= l / L) is 80% or more and 115% or less, A paper product packaging body, characterized in that when the thickness of the packaging base material is defined as B and the circumference ratio is defined as A, the value of (A / B x 100) is 110 or more and 410 or less.

2. The packaging substrate has a basis weight of 22 g / m ２ More than 77g / m ２ The paper product package of claim 1 .

3. The paper product package according to claim 1 , wherein the perimeter of the packaging base material in the short side direction is 200 mm or more and 400 mm or less.

4. The paper product packaging body according to claim 1, characterized in that the perimeter of the thin paper laminate in the short direction is 190 mm or more and 390 mm or less.

5. The paper product packaging body according to claim 1, characterized in that the longitudinal length of the tissue paper laminate is 150 mm or more and 190 mm or less.

6. The paper product packaging body according to claim 1, characterized in that the length of the thin paper laminate in the short direction is 80 mm or more and 130 mm or less.

7. The tissue paper has a basis weight of 10.0 g / m ２ 12.5g / m or more ２ 2. The paper product package of claim 1, wherein:

8. The paper product packaging body according to claim 1, characterized in that the thickness of the thin paper is 0.3 mm / 10 plies or more and 0.9 mm / 10 plies or less.

9. The specific volume of the tissue paper is 3.0 cm ３ / g or more 7.2cm ３ The paper product package according to claim 1, characterized in that the elastic modulus is 0.05 to 0.1 g or

10. The density of the tissue paper laminate is 0.14 g / cm ３ 0.28g / cm or more ３ 2. The paper product package of claim 1, wherein:

11. The paper product package according to claim 1 , wherein the packaging form is a pillow package.

12. The paper product package according to claim 1, wherein the packaging form is a gusset package.

13. A paper product collective package in which 3 to 8 packages are stored in a gusset packaging bag, The packaging body is a paper product packaging body according to any one of claims 1 to 12, The longitudinal direction of the packaging body is arranged approximately parallel to the up-down direction of the gusset packaging bag, a top surface of the package on which the take-out opening of the package is formed and a bottom surface of the package adjacent to the package are disposed in a left-right direction of the gusset packaging bag, A paper product assembly packaging body, characterized in that one longitudinal side of the packaging body is arranged facing the top surface of the gusset packaging bag, and the other longitudinal side of the packaging body is arranged facing the bottom surface of the gusset packaging bag.

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