Wrapping paper, paper packaging bags, and packaging bodies

Abstract

To provide packaging paper that is easy to fold when packaging the object to be packaged. [Solution] The wrapping paper is a wrapping paper for wrapping an object to be packaged, and has a basis weight of 32 g / m². 2 More than 55g / m 2 The following is observed: a plurality of first folds and / or a plurality of second folds are formed, the plurality of first folds extending along the MD direction of the wrapping paper and aligned with the CD direction of the wrapping paper, and the plurality of second folds extending along the CD direction and aligned with the MD direction.

Description

[Technical Field]

[0001] The present invention relates to wrapping paper, paper packaging bags, and packaging bodies. [Background technology]

[0002] Packaging for sheets such as tissue paper is known in which multiple sheets are contained in a resin film packaging bag with perforations for opening (for example, Patent Documents 1 and 2). In addition, for the purpose of reducing the amount of plastic used, packaging for paper products is known in which laminated tissue paper is covered with a packaging material containing a paper base, and the packaging material is provided with perforations to form an opening for dispensing (for example, Patent Document 3). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2008-183034 [Patent Document 2] Japanese Patent Publication No. 2018-177364 [Patent Document 3] Japanese Patent Publication No. 2022-57523 [Overview of the project] [Problems that the invention aims to solve]

[0004] In recent years, from the perspective of reducing environmental impact, it is desirable to use wrapping paper made solely of paper for packaging bags that wrap items such as sheets. However, when wrapping items with wrapping paper, there are problems such as the wrapping paper being difficult to fold, the wrapping paper tearing during packaging, or the packaging becoming unstable.

[0005] The object of this invention is to provide packaging paper that is easy to fold when packaging an object. [Means for solving the problem]

[0006] A first aspect according to the present invention is wrapping paper for wrapping an object to be wrapped, having a basis weight of 32 g / m 2 or more and 55 g / m 2 or less, and a plurality of first fold lines and / or a plurality of second fold lines are formed. The plurality of first fold lines extend along the MD direction of the wrapping paper and are arranged in the CD direction of the wrapping paper, and the plurality of second fold lines extend along the CD direction and are arranged in the MD direction.

[0007] In the first aspect, by providing a first fold line that extends along the MD direction and is arranged in the CD direction and / or a second fold line that extends along the CD direction and is arranged in the MD direction on wrapping paper having a basis weight of 32 g / m 2 or more and 55 g / m 2 or less, wrapping paper that is easy to fold when wrapping the object to be wrapped can be obtained. By wrapping the object to be wrapped with such wrapping paper, the wrapping paper is less likely to break when wrapping the object to be wrapped, and the wrapping state of the object to be wrapped is stabilized.

[0008] A second aspect according to the present invention is the wrapping paper according to the first aspect, wherein the fold line is formed by embossing and / or ruling. is.

[0009] In the second aspect, by forming the fold line by embossing and / or ruling, it is possible to reliably provide a fold line that extends along the MD direction or the CD direction of the wrapping paper and is arranged in the CD direction or the MD direction.

[0010] A third aspect according to the present invention is a paper-made packaging bag formed of the wrapping paper according to the first or second aspect.

[0011] In the third aspect, by forming the paper-made packaging bag with the above wrapping paper, the same effect as the above wrapping paper can be obtained. That is, according to the third aspect, a paper-made packaging bag in which the wrapping paper is easy to fold when wrapping the object to be wrapped can be obtained.

[0012] A fourth aspect of the present invention is a packaging body according to any one of the first to third aspects, wherein the packaging of the paper packaging bag is caramel packaging.

[0013] In the fourth embodiment, the packaging of the paper packaging bag is caramel-style, which allows for compact packaging of the item to be packaged. Although caramel-style packaging involves more folds in the wrapping paper compared to pillow packaging, etc., the aforementioned wrapping paper is used for the paper packaging bag, making it easy to package the item even with this type of caramel-style packaging.

[0014] A fifth aspect of the present invention is a packaging body comprising a paper packaging bag as described in the third or fourth aspect, and the packaged object contained in the paper packaging bag.

[0015] In the fifth embodiment, the same effect as the paper packaging bag described above can be obtained by constituting a package in which the object to be packaged is housed in the paper packaging bag described above. That is, according to the fifth embodiment, by using the above-mentioned packaging paper for the paper packaging bag that constitutes the package, a package can be obtained in which the packaging paper of the paper packaging bag is easy to fold when packaging the object to be packaged.

[0016] A sixth aspect of the present invention is the packaging body according to the fifth aspect, wherein the packaged object is a sheet laminate formed by stacking multiple sheets. In the sixth aspect, the same effects as those of the paper packaging bag described above can be obtained by placing the sheet laminate as the packaged object in the paper packaging bag described above.

[0017] In other words, according to the sixth embodiment, by using the above-mentioned wrapping paper in the paper packaging bag that constitutes the packaging body, a packaging body is obtained in which the wrapping paper of the paper packaging bag is easy to fold when packaging the sheet laminate. Furthermore, by packaging the sheet laminate with the above-mentioned wrapping paper, the wrapping paper is less likely to tear when packaging the sheet laminate, and the packaging state of the sheet laminate becomes stable. Moreover, when the packaging state of the sheet laminate is stable, the sheets can be easily removed from the sheet laminate. [Effects of the Invention]

[0018] According to one aspect of the disclosed invention, it is possible to provide packaging paper that is easy to fold when packaging an object to be packaged. [Brief explanation of the drawing]

[0019] [Figure 1] This figure shows a sheet packaging body in which a sheet laminate is contained in a paper packaging bag formed from the packaging paper of the embodiment. [Figure 2] This figure shows a sheet laminate housed in a paper packaging bag. [Figure 3] This is a view of the packaging shown in Figure 1, seen from the front. [Figure 4] This is a view of the packaging shown in Figure 1 from one side. [Figure 5] This is a view of the packaging shown in Figure 1 from the other side. [Figure 6] This figure shows the packaging paper of the embodiment. [Figure 7] This is a magnified view of a portion of Figure 6. [Figure 8] This figure shows packaging paper with fold lines that extend diagonally with respect to the MD and CD directions. [Figure 9] This is a magnified view of a portion of Figure 8. [Modes for carrying out the invention]

[0020] The embodiments of the present invention will be described in detail below with reference to the drawings. Parts common to all figures may be denoted by the same reference numerals and their descriptions may be omitted. Furthermore, the scale of each component in each drawing may differ from that of the actual components.

[0021] In this specification, the directions in the figures are described using a three-dimensional Cartesian coordinate system with three axes (X, Y, and Z directions). In each figure, the left-right direction (the longitudinal direction of the sheet stack, paper packaging bag, or packaging) is the X direction, the front-back direction (the short direction of the sheet stack, paper packaging bag, or packaging) is the Y direction, and the up-down direction (the height direction of the sheet stack, paper packaging bag, or packaging) is the Z direction.

[0022] Furthermore, in this specification, deviations in each direction are permitted to the extent that they do not impair the function and effect of the embodiment. Note that parallel and orthogonal directions may include substantially parallel and substantially orthogonal directions. <Package>

[0023] Figure 1 shows a package in which a sheet laminate is housed in a paper packaging bag made of the packaging paper of the embodiment, and Figure 2 shows the sheet laminate housed in the paper packaging bag. Figure 3 shows the package in Figure 1 viewed from the front, Figure 4 shows the package in Figure 1 viewed from one side, and Figure 5 shows the package in Figure 1 viewed from the other side.

[0024] The packaging 100 comprises a packaged object and a paper packaging bag 10 that contains the packaged object.

[0025] The packaged object is not particularly limited. In this embodiment, a sheet laminate SL is packaged in a paper packaging bag 10 as an example of a packaged object. As shown in Figure 2, the sheet laminate SL consists of multiple sheets S stacked in the stacking direction SD. The sheet laminate SL is designed so that the sheets S can be pulled out one by one or one by one through an opening 20 formed in the paper packaging bag 10.

[0026] The form of the sheet laminate SL is not particularly limited, and for example, sheets S are laminated in a folded state, sheets S are laminated alternately in a folded state (a so-called pop-up type sheet laminate), or multiple sheets S are simply laminated.

[0027] Furthermore, the dimensions of the sheet S (sheet laminate SL) can be such that the length in the longitudinal direction (X direction) of the paper packaging bag 10 is approximately 150 to 250 mm, the width in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the paper packaging bag 10 is approximately 70 to 150 mm, and the height in the height direction (Z direction) is approximately 20 to 100 mm. Such a sheet laminate can be manufactured, for example, by a rotary type or a multi-stand type interfolder.

[0028] The form of sheet S is not particularly limited and can be applied to, for example, sanitary tissues such as tissue paper, paper towels, kitchen paper, and toilet paper. These sanitary tissues also include sanitary tissues containing moisturizing ingredients (e.g., lotion tissues). These sanitary tissues are just examples of sheet-type sanitary tissues.

[0029] Furthermore, the use of sheet S is not particularly limited and can be applied to industrial, household, or portable use. Among these, household or portable tissue paper is preferably used as the sheet in this embodiment.

[0030] The number of plies in sheet S is not particularly limited, but can be one or more, preferably one ply or two plies (two layers). The shape of sheet S is also not particularly limited, but for example, it is preferable that the contour shape of a one-ply sheet when folded is rectangular (square, etc.).

[0031] The material of sheet S is not particularly limited, but for example, sheets of paper, nonwoven fabric, or cloth can be used, and paper (paper sheet) is preferred. When sheet S is a paper sheet, base paper made mainly from pulp is used. The pulp composition can be any known composition for paper sheets. For example, the pulp blending ratio can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0032] Furthermore, the pulp composition of the paper sheet used in sheet S is not particularly limited. For example, softwood pulp such as NBKP (softwood kraft pulp) or NUKP (unbleached softwood pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (unbleached hardwood pulp) can be used in any ratio.

[0033] In the paper sheet, the ratio of hardwood pulp to softwood pulp is not limited, but is preferably 90:10 to 20:80, and more preferably a pulp composition in which the ratio of hardwood pulp to softwood pulp is higher. Further, wastepaper pulp may be used as the pulp contained in the paper sheet.

[0034] The basis weight of the sheet S is not particularly limited, but depending on the ply number, in the case of paper, it is 5 g / m 2 or more and 80 g / m 2 or less, preferably 10 g / m 2 or more and 60 g / m 2 or less, more preferably 10 g / m 2 or more and 45 g / m 2 or less. In the case of a non-woven fabric, it is preferably 20 g / m 2 or more and 100 g / m 2 or less. The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0035] Also, the thickness of the paper sheet is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be adopted. For example, when the sheet S is paper, the paper thickness is 50 μm or more and 800 μm or less per 2 plies, preferably 60 μm or more and 700 μm or less, more preferably 70 μm or more and 500 μm or less.

[0036] Further, the paper sheet used for the sheet S may be embossed. Such embossing can be carried out by a known embossing method. The embossing method is not particularly limited, and examples include a steel rubber method, a steel match method, etc.

[0037] <Wrapping Paper and Paper Packaging Body> FIG. 6 is a diagram showing the wrapping paper of the embodiment, and FIG. 7 is an enlarged view of a part of FIG. 6. The paper packaging bag 10 is composed of the wrapping paper B. That is, the wrapping paper B is a wrapping paper for wrapping the object to be wrapped (in this embodiment, the sheet laminate SL).

[0038] Packaging paper B is made of paper. The paper that makes up packaging paper B is, for example, pulp made by bonding plant fibers together. The pulp composition in the paper component is not limited, and for example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, and preferably the pulp composition has a higher proportion of softwood pulp than hardwood pulp. In addition, recycled paper pulp may be used as the pulp.

[0039] The proportion of paper in packaging paper B is 50% or more, preferably 70% or more, and more preferably 100%.

[0040] The type of wrapping paper B is not particularly limited, but for example, wrapping paper can be used. Wrapping paper is further classified into unbleached wrapping paper or bleached wrapping paper.

[0041] Examples of unbleached wrapping paper include double-sided unbleached kraft paper, ribbed kraft paper, and single-sided glossy unbleached kraft paper.

[0042] Examples of bleached wrapping paper include pure white roll paper, double-sided bleached kraft paper, single-sided glossy bleached kraft paper, and thin imitation paper.

[0043] For wrapping paper B, double-sided kraft paper is preferred, and unbleached wrapping paper is preferred.

[0044] The basis weight of wrapping paper B is 32 g / m². 2 More than 55g / m 2 The following is preferable: 33 g / m² 2 More than 53g / m 2 The following is more preferable: 35 g / m² 2 More than 51g / m 2 The following applies. Note that basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0045] The thickness of wrapping paper B is not limited, but is, for example, 50 μm or more and 85 μm or less, more preferably 52 μm or more and 83 μm or less, and even more preferably 54 μm or more and 80 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014). If a fold line is formed as described later, the thickness of wrapping paper B refers to the thickness of the wrapping paper after the fold line is formed.

[0046] In this embodiment, the wrapping paper B has a plurality of first fold lines B1 and / or a plurality of second fold lines B2 formed on it. That is, the wrapping paper B may have only a plurality of first fold lines B1, only a plurality of second fold lines B2, or a plurality of first fold lines B1 and a plurality of second fold lines B2.

[0047] In this specification, a crease refers to a line or fold made on the surface of wrapping paper to make it easier to partially fold the wrapping paper. The crease may be either a mountain fold or a valley fold.

[0048] Multiple first fold lines B1 extend along the MD direction of the packaging paper B and are aligned along the CD direction of the packaging paper B. Here, the MD direction refers to the flow direction (also called the machine direction, transport direction, or longitudinal direction) during the manufacturing of the packaging paper B, and the CD direction refers to the direction perpendicular to the MD direction (also called the transverse direction).

[0049] The width of the multiple first fold lines B1 is not particularly limited, but is, for example, 0.1 mm or more and 2 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.3 mm or less.

[0050] The spacing between each first fold line B1 is not particularly limited, but is, for example, 0.5 mm or more and 5 mm or less, preferably 1 mm or more and 4 mm or less, and more preferably 1.5 mm or more and 3 mm or less.

[0051] The depth of the multiple first fold lines B1 is not particularly limited, but is, for example, 0.01 mm or more and 1 mm or less, preferably 0.05 mm or more and 0.5 mm or less, and more preferably 0.1 mm or more and 0.3 mm or less.

[0052] The multiple second fold lines B2 extend along the CD direction of the wrapping paper B and are aligned along the MD direction of the wrapping paper B. In other words, the multiple second fold lines B2 are arranged perpendicular to the multiple first fold lines B1.

[0053] The width of the multiple second fold lines B2 is not particularly limited, but is, for example, 0.1 mm or more and 2 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.3 mm or less.

[0054] The spacing between each second fold line B2 is not particularly limited, but is, for example, 0.5 mm or more and 5 mm or less, preferably 1 mm or more and 4 mm or less, and more preferably 1.5 mm or more and 3 mm or less.

[0055] The depth of the multiple second fold lines B2 is not particularly limited, but is, for example, 0.01 mm or more and 1 mm or less, preferably 0.05 mm or more and 0.5 mm or less, and more preferably 0.1 mm or more and 0.3 mm or less.

[0056] The shape of the creases constituting the first crease B1 and the second crease B2 is not particularly limited, but it is preferable that they are formed by embossing and / or creasing.

[0057] Embossing is a processing method that creates a raised or recessed pattern on the surface of wrapping paper B by pressing a mold against it. Embossing can be carried out by known embossing methods. The embossing method is not particularly limited and examples include the steel rubber method and the steel match method.

[0058] The fold lines formed by embossing are formed between the raised areas created by the embossing. The shape of the embossing is not particularly limited and can be circular, square, rectangular, etc. When the shape of the embossing is circular or square, the first fold line B1 and the second fold line B2 can be formed simultaneously. When the shape of the embossing is an elongated rectangle, the first fold line B1 and the second fold line B2 can be formed separately.

[0059] The creasing process is a method of making wrapping paper B easier to fold by creating creases in it. The creasing process can be carried out using known creasing methods. The creasing lines formed by the creasing process directly constitute the creases.

[0060] The shape of the paper packaging bag 10 is not particularly limited, but it is approximately a rectangular parallelepiped when the sheet laminate SL is contained within the paper packaging bag 10. Such an approximately rectangular parallelepiped paper packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, and two sides 15 and 16. In the paper packaging bag 10, as shown in Figures 1, 3, 4, and 5, the top surface 11 and the bottom surface 12 face each other in the vertical direction (Z direction), the front surface 13 and the back surface 14 face each other in the width direction (Y direction), and the two sides 15 and 16 face each other in the longitudinal direction (X direction). Also, the sides 15 and 16 are continuous with any of the top surface 11, bottom surface 12, front surface 13, and back surface 14.

[0061] The dimensions of the paper packaging bag 10 are not particularly limited. For example, the length in the longitudinal direction (X direction) of the paper packaging bag 10 can be about 150 to 250 mm, the length in the transverse direction (Y direction) perpendicular to the longitudinal direction (X direction) can be about 70 to 150 mm, and the height in the height direction (Z direction) can be about 20 to 100 mm. Note that the dimensions of the paper packaging bag 10 are those when the sheet laminate SL is contained in the paper packaging bag 10, as shown in Figures 1 and 2.

[0062] The packaging form of the paper packaging bag 10 can be, for example, as shown in Figure 3, a paper base material 10 having a predetermined length, with its edges 10A and 10B joined together to form a cylindrical shape, and the open end of the cylindrical paper base material sealed (pillow packaging); a cylindrical paper base material with both ends folded and sealed (caramel packaging); or a combination of these. In the case of pillow packaging, the cylindrical paper base material may be folded into a gusset shape.

[0063] As for the packaging form of the paper packaging bag 10, caramel packaging is preferable. Specifically, as shown in Figures 1, 4, and 5, the seal portion 30 on the front 13 of the paper packaging bag 10 is bonded (front seal), and the seal portions 40 and 50 on the sides 15 and 16 of the paper packaging bag 10 are folded and bonded (side seal), so that the sheet laminate SL is caramel-packaged in the paper packaging bag 10.

[0064] The seal is bonded to the paper substrate by coating it with a heat-sealing material and heating it. The components of the heat-sealing material are not particularly limited, but include, for example, polyethylene resins, polypropylene resins, and alkali-neutralized ethylene (meth)acrylic acid copolymers.

[0065] Alternatively, the seal portion may be bonded using a hot melt adhesive.

[0066] Examples of polyethylene resins include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), carboxylic acid-modified polyethylene, styrene-acrylic acid, styrene-butadiene latex and their derivatives, and mixtures thereof.

[0067] Examples of polypropylene resins include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, carboxylic acid-modified polypropylene, derivatives thereof, and mixtures thereof.

[0068] Examples of alkali-neutralized ethylene (meth)acrylic acid copolymers include those obtained by neutralizing the carboxyl groups of acrylic acid in an aqueous dispersion of ethylene (meth)acrylic acid copolymer resin with ammonia while heating and stirring in water.

[0069] Other additives may be incorporated into the heat seal material. Examples of other additives include water-soluble polymers, adhesives, inorganic pigments, organic pigments, sizing agents, viscosity modifiers, coloring dyes, coloring pigments, water-resistant agents, lubricants, etc., either individually or in combination.

[0070] The coating method for the heat seal material is not particularly limited, and known coating methods can be used. For example, known coating machines or printing machines such as a 2-roll size press coater, gate roll coater, blade metering coater, rod metering coater, blade coater, air knife coater, roll coater, brush coater, kiss coater, squeeze coater, curtain coater, die coater, bar coater, gravure coater, and flexo coater can be used for coating the heat seal material.

[0071] The coating amount of heat sealant (based on solid content) is 1 g / m². 2 More than 50g / m 2 The following is preferable: 2 g / m 2 More than 30g / m 2 The following is more preferable: 3 g / m 2 More than 15g / m 2 The following is even more preferable: 5 g / m 2 More than 10g / m 2 The following is particularly preferable: The coating amount of the heat sealant is 1 g / m². 2If the amount is less than 50g / m², it may not have sufficient heat seal strength, and the bag may not be properly sealed. 2 If this value is exceeded, the blocking suppression ability of the heat-sealed surface of the paper substrate will decrease, which may make it less slippery and more prone to tearing during the bag-making process, and may also prevent sufficient reduction in the amount of plastic used.

[0072] An opening 20 is formed on the top surface 11 of the paper packaging bag 10. The opening 20 is an opening for pulling out the sheets S of the sheet laminate SL from the paper packaging bag 10. The opening 20 is formed on the top surface 11 of the paper packaging bag 10 when a tearing line M provided on the top surface 11 is torn. The tearing line M is, for example, a perforation. The perforation is an intermittent cut line in which cuts and ties (uncut portions between two cuts) are arranged alternately, and when a tie breaks, the cuts on both sides become continuous cuts.

[0073] In the perforations, the cut length and tie length are arbitrary. In the perforations, the cut length can be 1 mm or more and 19 mm or less, preferably 5 mm or more and 17 mm or less, and more preferably 10 mm or more and 15 mm or less. The tie length can be 0.3 mm or more and 1.2 mm or less, preferably 0.4 mm or more and 1.1 mm or less, and more preferably 0.5 mm or more and 1.0 mm or less.

[0074] The shape of the opening constituting the outlet 20 is not particularly limited, and for example, it may have a shape that extends in one direction when viewed from above. Furthermore, the shape that extends in one direction is not limited to a straight line, but may be an elongated rectangle, an ellipse, a racetrack shape (hereinafter referred to as track shape or track), a gourd shape (or dumbbell shape), etc. Here, a gourd shape (or dumbbell shape) refers to a shape in which the central part of an ellipse is constricted. Among these, a straight line, an ellipse, a track shape, and a gourd shape (or dumbbell shape) are preferred, and a straight line or a track shape is more preferred.

[0075] The length of the outlet 20 in the longitudinal direction (X direction) is not particularly limited, and for example, it is 40% to 100% of the length of the top surface 11 of the paper packaging bag 10 in the longitudinal direction (X direction), preferably 45% to 90%, and more preferably 50% to 80%.

[0076] Furthermore, the length of the short side (Y direction) of the dispensing opening 20 is preferably 0.1% to 45% of the length of the short side (Y direction) of the top surface 11 of the paper packaging bag 10, more preferably 0.1% to 30%, and even more preferably 0.1% to 15%.

[0077] In this embodiment, as described above, the basis weight is 32 g / m². 2 More than 55g / m 2 By providing the following wrapping paper B with a first fold line B1 extending along the MD direction and aligned in the CD direction, and / or a second fold line B2 extending along the CD direction and aligned in the MD direction, a wrapping paper B that is easy to fold when wrapping an object is obtained. When an object is wrapped with such wrapping paper B, the wrapping paper B is less likely to tear when the object is wrapped, and the wrapped state of the object is stabilized.

[0078] Furthermore, in this embodiment, as described above, by forming fold lines B1 and B2 by embossing and / or creasing, it is possible to reliably provide fold lines B1 and B2 that extend along the MD direction or CD direction and are aligned in the CD direction or MD direction of the wrapping paper B.

[0079] Furthermore, as shown in Figures 8 and 9, packaging paper with fold lines extending diagonally to the MD and CD directions does not offer the same ease of folding as the packaging paper in the embodiment.

[0080] In this embodiment, as described above, the same effects as those of wrapping paper B can be obtained by forming the paper packaging bag 10 with wrapping paper B. That is, in this embodiment, a paper packaging bag 10 can be obtained in which wrapping paper B can be easily folded when packaging the item to be packaged.

[0081] In this embodiment, as described above, the packaging of the paper packaging bag 10 is caramel-style, which allows for compact packaging of the item to be packaged. Although caramel packaging involves more folds in the wrapping paper compared to pillow packaging, etc., since wrapping paper B is used in the paper packaging bag 10, packaging of the item to be packaged is easy even with this type of caramel packaging.

[0082] In this embodiment, the same effects as those of a paper packaging bag 10 can be obtained by constructing a package 100 in which the object to be packaged is housed in a paper packaging bag 10. That is, according to this embodiment, by using packaging paper B in the paper packaging bag 10 that constitutes the package 100, a package can be obtained in which the packaging paper B of the paper packaging bag 10 is easy to fold when packaging the object to be packaged.

[0083] In this embodiment, by placing the sheet laminate SL in a paper packaging bag 10 as the object to be packaged, the same effects as those of a paper packaging bag 10 can be obtained. According to this embodiment, by using wrapping paper B in the paper packaging bag 10 that constitutes the packaging body 100, a packaging body 100 is obtained in which the wrapping paper B of the paper packaging bag 10 is easy to fold when packaging the sheet laminate SL. In addition, by packaging the sheet laminate SL with wrapping paper B, the wrapping paper B is less likely to tear when packaging the sheet laminate SL, and the packaging state of the sheet laminate SL is stabilized. Furthermore, when the packaging state of the sheet laminate SL is stable, the sheets S can be easily removed from the sheet laminate SL. [Examples]

[0084] The present invention will be described in detail below using examples. The examples and comparative examples were evaluated by the following tests.

[0085] <Package> As shown in Figures 1 and 2, a package was prepared in which a sheet laminate, consisting of multiple sheets stacked together, was packaged in a paper packaging bag 10.

[0086] <Sheet laminate (packaged material)> The laminated sheet is a paper towel (manufactured by Daio Paper Corporation, Elleair Plus Kirei Compact Type, 2-ply, 200 sheets, basis weight 14.5g / m²) in which the sheets are folded alternately and laminated so that they can be pulled out one set at a time in a pop-up fashion. 2 The sheet laminate had a length of 186 mm, the paper packaging bag 10 had a length of 192 mm, and the packaging bag had a thickness of 40 μm.

[0087] <Paper packaging bag> The paper packaging bags used were caramel-wrapped packaging paper coated with heat-seal material. An opening (tear line for tearing) was provided on the top of the packaging bag.

[0088] <Wrapping paper> The wrapping paper has a basis weight of 30-70 g / m². 2 Double-sided kraft paper was used.

[0089] <Basis weight (grammage) of wrapping paper> Basis weight of wrapping paper (g / m²) 2 The measurement was performed in accordance with the provisions of JIS-P-8124(2011).

[0090] <Thickness of wrapping paper> The thickness of the wrapping paper was measured using an ISO paper thickness gauge (CITIZEN, MEI-11) in accordance with the provisions of JIS P 8118 (2014). If folds are formed in the wrapping paper, the thickness refers to the thickness of the wrapping paper after the folds have been formed.

[0091] <Tensile strength of wrapping paper> The tensile strength of the wrapping paper was measured in both the longitudinal (MD direction) and transverse (CD direction) directions, in accordance with the provisions of JIS P 7127 (1999). Furthermore, the average value of the longitudinal tensile strength and the transverse tensile strength was also calculated.

[0092] <Tear strength> The tear strength of the packaging paper was measured in both the longitudinal (MD direction) and transverse (CD direction) directions using a tear strength tester (Elmendorf tear strength tester, manufactured by Kumagai Riki Kogyo Co., Ltd.) in accordance with the provisions of JIS P 8116 (2000). Furthermore, the average value of the longitudinal tear strength and the transverse tear strength was also calculated.

[0093] <Gurley stiffness> The Gurley stiffness of the wrapping paper was measured in the longitudinal (MD direction) and transverse (CD direction) directions, in accordance with JIS L-1085:1998 and JIS L-1096:2010. Furthermore, the average value of the Gurley stiffness in the longitudinal and transverse directions was also calculated.

[0094] <Taber stiffness> The Taber stiffness of the packaging paper was measured using a Taber stiffness tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.) in accordance with the provisions of JIS P 8125 (2000). Furthermore, the average value of the vertical and horizontal Taber stiffness was also calculated.

[0095] <Tears in the packaging paper during packaging> Regarding the packaging paper, we checked and evaluated the tearing of the packaging paper when packaging the sheet laminate SL. [Evaluation Criteria] Good: It didn't tear. Unacceptable: Torn

[0096] <Ease of folding> Regarding the packaging paper, we checked and evaluated how easily the packaging paper could be folded when packaging the sheet laminate SL. [Evaluation Criteria] Good: Easy to fold Defect: Difficult to fold

[0097] Examples and comparative examples will be described below.

[0098] [Example 1] The basis weight is 35g / m². 2Multiple first fold lines extending approximately 1 mm in width along the MD direction and spaced approximately 2 mm apart in the CD direction, and multiple second fold lines extending approximately 1 mm in width along the CD direction and spaced approximately 2 mm apart in the MD direction, were formed on the wrapping paper by embossing. The conditions of the wrapping paper (basis weight, thickness, tensile strength, tear strength, Gurley stiffness, Taber stiffness) and evaluation results (tear resistance during packaging, ease of folding) are shown in Table 1.

[0099] [Example 2] The basis weight of the wrapping paper is 40 g / m². 2 Except for the above, the packaging paper was prepared in the same manner as in Example 1. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0100] [Example 3] The basis weight of the wrapping paper is 50 g / m². 2 Except for the above, the packaging paper was prepared in the same manner as in Example 1. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0101] [Comparative Example 1] The basis weight of the wrapping paper is 30 g / m². 2 Except for the above, the packaging paper was prepared in the same manner as in Example 1. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0102] [Comparative Example 2] The basis weight of the wrapping paper is 60 g / m². 2 Except for the above, the packaging paper was prepared in the same manner as in Example 1. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0103] [Comparative Example 3] The basis weight of the wrapping paper is 70 g / m². 2 Except for the above, the packaging paper was prepared in the same manner as in Example 1. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0104] [Comparative Example 4] Except for not forming fold lines in the wrapping paper, the wrapping paper was prepared in the same manner as in Comparative Example 1. The conditions of the wrapping paper and the evaluation results are shown in Table 1.

[0105] [Comparative Example 5] The packaging paper was prepared in the same manner as in Example 1, except that no fold lines were formed in the packaging paper. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0106] [Comparative Example 6] The packaging paper was prepared in the same manner as in Example 2, except that no fold lines were formed in the packaging paper. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0107] [Comparative Example 7] The packaging paper was prepared in the same manner as in Example 3, except that no fold lines were formed in the packaging paper. The conditions of the packaging paper and the evaluation results are shown in Table 1.

[0108] [Comparative Example 8] Except for not forming fold lines in the wrapping paper, the wrapping paper was prepared in the same manner as in Comparative Example 2. The conditions of the wrapping paper and the evaluation results are shown in Table 1.

[0109] [Comparative Example 9] Except for not forming fold lines in the wrapping paper, the wrapping paper was prepared in the same manner as in Comparative Example 3. The conditions of the wrapping paper and the evaluation results are shown in Table 1.

[0110] [Table 1]

[0111] [Table 2]

[0112] Table 1 shows that in Examples 1-3, the basis weight was 35-50 g / m². 2 The wrapping paper, which had multiple first fold lines extending along the MD direction and aligned in the CD direction, and multiple second fold lines extending along the CD direction and aligned in the MD direction, did not tear and was easy to fold.

[0113] On the other hand, in Comparative Examples 1 and 4, the basis weight was 30 g / m². 2 The packaging bags tore regardless of whether they had folds or not. Furthermore, in comparative examples 2, 3, 8, and 9, the basis weight was 60 g / m². 2The above packaging bags were difficult to fold, regardless of whether they had creases or not. Furthermore, in Comparative Examples 5-7, the packaging paper without creases had a basis weight of 35-50 g / m². 2 But it was difficult to fold.

[0114] Although embodiments of the present invention have been described above, the present invention is not limited to any particular embodiment, and various modifications and changes are possible within the scope of the invention as described in the claims. [Explanation of Symbols]

[0115] 100-sheet package 10 Paper packaging bags 10A edge 10B edge 11 Top surface 11A surface 11B Back side 12. Base 13 Front 14 Back 15 Side view 16 Side view 20 Outlet M Cut line for cleavage 30. Seal section (front seal) 40. Seal section (side seal) 50. Seal section (side seal) B Wrapping paper B1, B2 fold lines C wrapping paper C1, C2 fold lines S Seat SL sheet laminate SD stacking direction

Claims

1. Wrapping paper for packaging an object to be packaged, Basis weight: 32 g / m² ２ 55g / m or more ２ The following: Multiple first fold lines and / or multiple second fold lines are formed, The plurality of first fold lines extend along the MD direction of the wrapping paper and are aligned along the CD direction of the wrapping paper. The plurality of second fold lines extend along the CD direction and are aligned in the MD direction. wrapping paper.

2. The aforementioned fold lines are formed by embossing and / or creasing. The packaging paper according to claim 1.

3. Formed from the wrapping paper described in claim 1 or 2, Paper packaging bag.

4. The aforementioned paper packaging bag is caramel-wrapped. The paper packaging bag according to claim 3.

5. A paper packaging bag according to claim 3, The packaged object is contained in the aforementioned paper packaging bag, packaging.

6. The packaged object is a sheet laminate in which multiple sheets are stacked together. The packaging according to claim 5.

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