Packaging body

Abstract

This packaging body includes a paper base material for packaging a body to be packaged, the paper base material having a contact surface in contact with the body to be packaged and a non-contact surface not in contact with the body to be packaged on the side opposite to the contact surface, and a heat sealing agent being applied to a joining region where paper base materials are joined, excluding a contact region where the body to be packaged comes into contact with the paper base material, of the contact surface.

Description

packaging

[0001] The present disclosure relates to packaging.

[0002] Sheet packages containing sheets such as tissue paper are distributed in the form of a plurality of sheets contained in a packaging bag made of a resin film (see, for example, Patent Documents 1 and 2). In addition, in light of the recent trend toward reducing the amount of plastic used, a package is known in which a laminated paper product is packaged in a packaging base material including a paper base material and a heat-sealable layer (see, for example, Patent Document 3).

[0003] JP 2008-183034 A JP 2018-177364 A JP 2021-123339 A

[0004] When packaging an item using a packaging base material in which a heat-seal layer is laminated on a paper base material, there is a risk that the heat-seal layer will adhere to the item when the packaging base material is heated and sealed, thereby impairing the quality of the item.

[0005] An object of the present disclosure is to provide a package that can reduce the amount of plastic used without compromising the quality of the packaged item.

[0006] A packaging body according to one aspect of the present disclosure is a packaging body including a paper substrate for packaging an item to be packaged, wherein the paper substrate has a contact surface that comes into contact with the item to be packaged and a non-contact surface opposite the contact surface that does not come into contact with the item to be packaged, and a heat sealing agent is applied to the joining area of ​​the contact surface where the paper substrates are joined together, excluding the contact area where the item to be packaged comes into contact with the paper substrate.

[0007] According to one aspect of the disclosed invention, a package is provided that can reduce the amount of plastic used without impairing the quality of the packaged item.

[0008] FIG. 1 is a diagram showing a packaging body of a first embodiment; FIG. 2 is a diagram showing a sheet-like sanitary tissue paper contained in a packaging bag; FIG. 3 is a diagram showing the packaging body of FIG. 1 as seen from the front side; FIG. 4 is a diagram showing the packaging body of FIG. 1 as seen from one side; FIG. 5 is a diagram showing the packaging body of FIG. 1 as seen from the other side; FIG. 6 is a diagram showing the packaging body of FIG. 1 as seen from the inside when unfolded; FIG. 7 is a diagram showing the packaging body of FIG. 2 as seen from the outside when unfolded; FIG. 8 is a diagram showing a combination of an unfolded view of the packaging body of a second embodiment as seen from the inside and the outside.

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Common parts in the drawings will be denoted by the same reference numerals, and descriptions thereof may be omitted. Furthermore, the scale of each component in each drawing may differ from the actual scale.

[0010] In this specification, directions in 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 laminate, packaging bag, or sheet packaging body) is the X direction, the front-rear direction (the lateral direction of the sheet laminate, packaging bag, or sheet packaging body) is the Y direction, and the up-down direction (the height direction of the sheet laminate, packaging bag, or sheet packaging body) is the Z direction.

[0011] In this specification, deviations in each direction are permitted to the extent that they do not impair the functions and effects of the embodiments. Note that perpendicular may include substantially perpendicular.

[0012] First Embodiment

[0013] Fig. 1 is a diagram showing a package of a first embodiment, Fig. 2 is a diagram showing a sheet of sanitary tissue paper contained in a packaging bag, Fig. 3 is a diagram showing the package of Fig. 1 as seen from the front side, Fig. 4 is a diagram showing the package of Fig. 1 as seen from one side, and Fig. 5 is a diagram showing the package of Fig. 1 as seen from the other side.

[0014] The packaging body 100 has a packaging bag 10 for packaging an item to be packaged.

[0015] The object to be packaged is not particularly limited. In the present embodiment, a sheet stack SL is packaged in the packaging bag 10 as an example of the object to be packaged. As shown in Fig. 2 , the sheet stack SL has a plurality of sheets (plurality of sheets or plurality of sets) S stacked in a stacking direction SD. The sheet stack SL is configured so that the sheets S can be pulled out one by one or one set at a time through an outlet 20 formed in the packaging bag 10.

[0016] The form of the sheet stack SL is not particularly limited, and may be, for example, a stack of sheets S in a folded state, a stack of sheets S in a folded state and stacked alternately (a so-called pop-up sheet stack), or a stack of multiple sheets S simply stacked.

[0017] The dimensions of the sheet S (sheet stack SL) can be approximately 150 to 250 mm in the longitudinal direction (X direction) of the packaging bag 10, approximately 70 to 150 mm in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 10, and approximately 20 to 100 mm in the height direction (Z direction). Such a tissue paper stack can be manufactured, for example, using a rotary or multi-stand interfolder.

[0018] The form of the sheet S is not particularly limited, and can be applied to, for example, sanitary thin papers such as tissue paper, paper towels, kitchen paper, and toilet paper. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissues). These sanitary thin papers are examples of sheet-form sanitary thin papers.

[0019] The use of the sheet S is not particularly limited, and it can be used for industrial, home, or portable purposes. Among these, tissue paper for home or portable use is preferably used as the sheet in this embodiment.

[0020] The number of plies of the sheet S is not particularly limited, but can be one or more, and is preferably one or two (two layers stacked together). The shape of the sheet S is also not particularly limited, but it is preferable that the outline shape of a one-ply sheet when folded is quadrangular (rectangular, square, etc.).

[0021] The material of the sheet S is not particularly limited, but may be, for example, a sheet of paper, nonwoven fabric, or cloth, and is preferably paper (paper sheet). When the sheet S is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be any known composition for paper sheets. For example, the pulp content may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0022] Furthermore, there are no particular limitations on the pulp composition of the paper sheet used for the sheet S. For example, any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) to hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used.

[0023] The ratio of hardwood pulp to softwood pulp in the paper sheet 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. Furthermore, recycled paper pulp may be used as the pulp contained in the paper sheet.

[0024] The basis weight of the sheet S is not particularly limited, but in the case of paper, it is 5 g / m ２ 80g / m or more ２ or less, preferably 10 g / m ２ 60g / m or more ２ or less, more preferably 10 g / m ２ 45g / m or more ２ In the case of nonwoven fabric, the density is 20 g / m or less. ２ More than 100g / m ２ The following are desirable: The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0025] The thickness of the paper sheet is not particularly limited, and can be the thickness measured under the conditions of JIS P 8111 (1998). For example, when the sheet S is paper, the thickness is 50 μm or more and 600 μm or less, preferably 60 μm or more and 500 μm or less, and more preferably 100 μm or more and 400 μm or less per two plies.

[0026] 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 thereof include a steel rubber method and a steel match method.

[0027] The packaging bag 10 is made of a paper base material. That is, in this embodiment, the sheet stack SL as the packaged object is packaged in the paper base material. The paper base material refers to a base material that includes paper.

[0028] The paper constituting the paper base material is, for example, a material made by agglutinating plant fibers (pulp). The pulp composition of the paper components is not limited, and for example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, and preferably the ratio of softwood pulp to hardwood pulp is higher. Furthermore, recycled paper pulp may also be used as the pulp.

[0029] The type of paper is not particularly limited, but for example, wrapping paper can be applied. Wrapping paper is further classified into unbleached wrapping paper and bleached wrapping paper.

[0030] Examples of unbleached wrapping paper include unbleached kraft paper with both sides glazed, ribbed kraft paper, and unbleached kraft paper with one side glazed.

[0031] Examples of bleached wrapping paper include pure white roll paper, double glazed bleached kraft paper, single glazed bleached kraft paper, and thin construction paper.

[0032] As the paper used for the paper substrate, unglazed kraft paper and unbleached wrapping paper are preferred.

[0033] The basis weight of the paper constituting the paper substrate is not limited, but is preferably 20 g / m ２80g / m or more ２ More preferably, it is 30 g / m or less. ２ 70g / m or more ２ More preferably 40 g / m or less ２ 60g / m or more ２ The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0034] The thickness of the paper constituting the paper substrate is not limited, but is, for example, preferably 20 μm to 300 μm, more preferably 30 μm to 200 μm, and even more preferably 40 μm to 180 μm. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

[0035] The paper constituting the paper base material may be embossed. Such embossing can be carried out by a known embossing method. The embossing method is not particularly limited, and examples thereof include a steel rubber method and a steel match method.

[0036] In addition, when the paper constituting the paper base material is embossed, the thickness of the paper refers to the thickness of the paper before being embossed.

[0037] The ratio of paper to the paper substrate is 45% or more, preferably 50% or more, more preferably 70% or more, and even more preferably 100%.

[0038] The shape of the packaging bag 10 is not particularly limited, but is generally a rectangular parallelepiped when the sheet laminate SL is housed in the packaging bag 10. Such a generally rectangular parallelepiped packaging bag 10 has a top surface 11, a bottom surface 12, a front surface 13, a back surface 14, and side surfaces 15 and 16. 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 side surfaces 15 and 16 face each other in the longitudinal 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.

[0039] The dimensions of the packaging bag 10 are not particularly limited. For example, the length of the packaging bag 10 in the longitudinal direction (X direction) can be approximately 150 to 250 mm, the length of the packaging bag 10 in the short direction (Y direction) perpendicular to the longitudinal direction (X direction) can be approximately 70 to 150 mm, and the height in the height direction (Z direction) can be approximately 20 to 100 mm. Note that the dimensions of the packaging bag 10 are the dimensions when the sheet laminate SL is contained in the packaging bag 10, as shown in Figures 1 and 2.

[0040] The packaging form of the packaging bag 10 is not particularly limited, and may be, for example, as shown in Fig. 3, a paper substrate having a predetermined length is processed into a cylindrical shape by joining edges 10A, 10B, and the open end of the cylindrical paper substrate is sealed (pillow packaging), or both ends of the cylindrical paper substrate are folded and sealed (caramel packaging), or a combination of these. In the case of pillow packaging, the cylindrical paper substrate may be folded into a gusset shape.

[0041] In the packaging body 100 of this embodiment, caramel packaging is adopted as the packaging form of the packaging bag 10. Specifically, as shown in Figures 1 to 8, the sheet laminate SL is caramel packaged in the packaging bag 10 in a state where the seal portion 30 (front seal) on the front surface 13 of the packaging bag 10 is sealed and the seal portions 40, 50 (side seals) on the side surfaces 15, 16 of the packaging bag 10 are sealed in a folded state.

[0042] The sealing is performed by applying a heat-sealing agent to a paper substrate and then heating the applied heat-sealing agent. The components of the heat-sealing agent are not particularly limited, but examples thereof include polyethylene resins, polypropylene resins, and alkali-neutralized ethylene (meth)acrylic acid copolymers.

[0043] 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, derivatives thereof, and mixtures thereof.

[0044] Examples of polypropylene-based resins include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, carboxylic acid-modified polypropylene, and derivatives thereof, as well as mixtures thereof.

[0045] 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 an ethylene (meth)acrylic acid copolymer resin with ammonia in water under heating and stirring.

[0046] The heat-sealing agent may contain additives other than those mentioned above, such as water-soluble polymers, adhesives, inorganic pigments, organic pigments, sizing agents, viscosity modifiers, coloring dyes, coloring pigments, water-resistant agents, lubricants, etc., used alone or in combination.

[0047] The method for applying the heat-sealing agent is not particularly limited, and any known coating method can be used, such as a two-roll size press coater, a gate roll coater, a blade metering coater, a rod metering coater, a blade coater, an air knife coater, a roll coater, a brush coater, a kiss coater, a squeeze coater, a curtain coater, a die coater, a bar coater, or a gravure coater.

[0048] The coating amount of the heat sealing agent (in terms of solid content) was 1.5 g / m ２ 10.0g / m or more ２ Preferably, 2.0 g / m or less ２ 8.0g / m or more ２ More preferably, 3.0 g / m or less ２ 6.0g / m or more ２ More preferably, 3.6 g / m or less ２ 5.4g / m or more ２The following is particularly preferred: If the coating amount of the heat-sealing agent does not meet the above lower limit, the heat-seal strength may be insufficient, and the bag may not be sealed properly when made into a bag. If the coating amount of the heat-sealing agent exceeds the above upper limit, the blocking suppression ability of the heat-sealing surface of the paper substrate may decrease, making the bag less slippery and more likely to tear during the bag-making process, and the amount of plastic may not be reduced sufficiently.

[0049] An outlet 20 is formed on the top surface 11 of the packaging bag 10. The outlet 20 allows the sheet S of the sheet stack SL to be pulled out. The outlet 20 is configured as an opening. The opening that forms the outlet 20 may be configured by tearing a perforation (intermittent cut) not shown.

[0050] The shape of the opening constituting the outlet 20 is not particularly limited, and may be, for example, a straight line, an elongated rectangle, an ellipse, a truck-like shape, a gourd-like shape (or a dumbbell-like shape) in a plan view. Here, the gourd-like shape (or a dumbbell-like shape) refers to an ellipse with a narrowed center. Among these, the straight line, ellipse, truck-like shape, and gourd-like shape (or a dumbbell-like shape) are preferred, and the truck-like shape and gourd-like shape (or a dumbbell-like shape) are more preferred.

[0051] The length of the outlet 20 in the longitudinal direction (X direction) is not particularly limited, and is, for example, 40% or more and 100% or less of the length of the top surface 11 of the packaging bag 10 in the longitudinal direction (X direction), preferably 45% or more and 90% or less, and more preferably 50% or more and 80% or less.

[0052] In addition, the length of the outlet 20 in the short direction (Y direction) is preferably 0.1% or more and 45% or less of the length of the top surface 11 of the packaging bag 10 in the short direction (Y direction), more preferably 0.1% or more and 30% or less, and even more preferably 0.1% or more and 15% or less.

[0053] <Coating area of ​​heat sealant> Fig. 6 is a view of the package of Fig. 1 unfolded and seen from the inside, Fig. 7 is a view of the package of Fig. 1 unfolded and seen from the outside, and Fig. 8 is a view combining Fig. 6 and Fig. 7. The paper base material constituting the packaging bag 10 has a contact surface 10C that comes into contact with the sheet laminate SL, as shown in Fig. 6. The contact surface 10C corresponds to the surface located on the inside of the packaging bag 10 when the sheet laminate SL is contained in the packaging bag 10.

[0054] 7, the paper base material constituting the packaging bag 10 has a non-contact surface 10D that does not come into contact with the sheet stack SL on the side opposite to the contact surface 10C. The non-contact surface 10D corresponds to the surface located on the outside of the packaging bag 10 when the sheet stack SL is contained in the packaging bag 10.

[0055] 6 and 8, in the packaging body 100 of this embodiment, a heat sealant is applied to joining regions C1, C3, and C4 on the contact surface 10C where the paper base materials constituting the packaging bag 10 are joined together. The joining regions C1, C3, and C4 on the contact surface 10C are all regions excluding the contact region CR where the sheet laminate SL comes into contact.

[0056] 7 and 8, in the packaging body 100 of this embodiment, a heat sealant is applied to joining areas C2, C5, and C6 on the non-contact surface 10D where the paper base materials constituting the packaging bag 10 are joined together. The joining areas C2, C5, and C6 on the non-contact surface 10D are all areas excluding the exposed area ER where the paper base material is exposed.

[0057] 6 to 8, the bonding areas C1 and C2 are areas where the contact surface 10C and the non-contact surface 10D are bonded. Also, the bonding areas C3, C4, C5, and C6 include areas where the contact surface 10C and the non-contact surface 10D are bonded and areas where the contact surfaces 10C are bonded to each other, as shown in FIGS.

[0058] For example, the joining area C1 of the contact surface 10C joins with the joining area C2 of the non-contact surface 10D. The joining area C1 of the contact surface 10C and the joining area C2 of the non-contact surface 10D mainly form the seal portion 30 (front seal) of the front surface 13 of the packaging bag 10, and parts of the joining areas C1 and C2 form the seal portion 40 (side seal) of the side surface 15 of the packaging bag 10 and the seal portion 50 (side seal) of the side surface 16 of the packaging bag 10.

[0059] Furthermore, the joining area C3 of the contact surface 10C is joined to another joining area C3 of the contact surface 10C and to a joining area C5 of the non-contact surface 10D. The joining area C3 of the contact surface 10C and the joining area C5 of the non-contact surface 10D form a seal portion 40 (side seal) of the side surface 15 of the packaging bag 10.

[0060] Furthermore, the joining area C4 of the contact surface 10C is joined to another joining area C4 of the contact surface 10C and to a joining area C6 of the non-contact surface 10D. The joining area C4 of the contact surface 10C and the joining area C6 of the non-contact surface 10D form a seal portion 50 (side seal) of the side surface 16 of the packaging bag 10.

[0061] The effects of this embodiment will be described below. As described above, in this embodiment, a heat sealant is applied to the contact areas C1, C3, and C4 where the paper base materials are joined together on the contact surface 10C of the paper base material constituting the packaging bag 10 that comes into contact with the sheet laminate SL, excluding the contact area CR where the sheet laminate SL comes into contact with the paper base material. This prevents the heat sealant from adhering to the sheet laminate SL when the packaging body 100 is sealed. Therefore, according to this embodiment, the amount of plastic can be reduced without compromising the quality of the sheet laminate SL.

[0062] Furthermore, although a resin is used as the heat-sealing agent, the amount of resin used can be reduced by applying the heat-sealing agent only to the joining areas C1, C3, and C4 of the contact surface 10C of the paper substrate that comes into contact with the sheet laminate SL, where the paper substrates are joined together. From this perspective, the present embodiment can also reduce the amount of plastic used.

[0063] In this embodiment, a heat seal agent is applied to the contact surface 10C that comes into contact with the paper-based sheet stack SL and the non-contact surface 10D that does not come into contact with the sheet stack SL on the opposite side, so that the heat seal agent does not adhere to the sheet stack SL when sealing the package 100. Therefore, in this embodiment, the heat seal agent is applied not only to the contact surface 10C that comes into contact with the paper-based sheet stack SL but also to the non-contact surface 10D that does not come into contact with the paper-based sheet stack SL, so that the seal strength of the package 100 can be increased.

[0064] In addition, in this embodiment, heat sealing agent is applied to the joining areas C2, C5, and C6 where the paper base materials are joined together, excluding the exposed area ER where the paper base material is exposed, on the non-contact surface 10D that does not come into contact with the paper base material sheet laminate SL, thereby preventing the heat sealing agent from being exposed to the outside of the packaging body 100.

[0065] Therefore, in this embodiment, it is possible to prevent the packaging body 100 from adhering to the production line during production, the packaging bodies 100 from adhering to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging body 100.

[0066] In this embodiment, as described above, the heat sealant is applied to the contact surface 10C of the paper base material that comes into contact with the sheet stack SL and the non-contact surface 10D that does not come into contact with the sheet stack SL, which is on the opposite side, so that the heat sealant does not adhere to the sheet stack SL when sealing the package. Therefore, according to this embodiment, it is possible to reduce the amount of plastic without compromising the quality of the sheet stack SL.

[0067] In addition, in this embodiment, heat sealing agent is applied to the joining areas C2, C5, and C6 where the paper base materials are joined together, excluding the exposed area ER where the paper base material is exposed, on the non-contact surface 10D that does not come into contact with the paper base material sheet laminate SL, thereby preventing the heat sealing agent from being exposed to the outside of the packaging body 100.

[0068] Therefore, in this embodiment, it is possible to prevent the packaging body 100 from adhering to the production line during production, the packaging bodies 100 from adhering to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging body 100.

[0069] In this embodiment, as described above, the joining regions C1 to C6 where the paper base materials are joined together are only the regions where the contact surface 10C of the paper base material that comes into contact with the sheet stack SL and the non-contact surface 10D of the paper base material that does not come into contact with the sheet stack SL on the opposite side of the contact surface 10C are joined, so that both end edges 10A, 10B of the paper base material rolled into a cylindrical shape can be overlapped and joined around the sheet stack SL. This makes it easy to package the sheet stack SL using the paper base material, and also enables compact packaging.

[0070] In this embodiment, as described above, the joining regions C3 to C6 where the paper base materials are joined together are only the regions where the contact surfaces 10C of the paper base materials that come into contact with the sheet stack SL are joined together, which enables pillow packaging of the sheet stack SL using the paper base materials. Furthermore, by combining the joining of the contact surfaces 10C of the paper base materials with the joining of the contact surface 10C and the non-contact surface 10D of the paper base materials described above, it becomes possible to caramel-wrap the sheet stack SL using the paper base materials.

[0071] In this embodiment, as described above, the sheet stack SL is caramel-wrapped, thereby enabling the sheet stack SL to be packaged compactly. Furthermore, by caramel-wrapping the sheet stack SL, the seal strength of the package 100 can be increased.

[0072] In this embodiment, as described above, it is possible to prevent the heat sealing agent from adhering to the sheet stack SL when sealing the packaging body 100, so that even if the sheet stack SL is made up of multiple stacked sheets S, the sheets S can be pulled out one by one from the outlet 20 while the sheet stack SL is packaged and used.

[0073] Second Embodiment Fig. 9 is a composite view of an unfolded package according to a second embodiment, viewed from the inside and the outside. In Fig. 9, parts common to those in Fig. 8 are designated by the same or corresponding reference numerals as in Fig. 9, and description thereof will be omitted.

[0074] 9, in the packaging body 100 of the second embodiment, a heat sealing agent is applied to joining regions C7 and C8 on the contact surface 10C where the paper base materials constituting the packaging bag 10 are joined together. Both C7 and C8 on the contact surface 10C are regions excluding the contact region CR where the sheet laminate SL comes into contact.

[0075] The joining area C7 of the contact surface 10C is provided on the side surface half 15B on the bottom surface 12 side of the packaging bag 10, but not on the side surface half 15A on the top surface 11 side of the packaging bag 10. In other words, the heat sealing agent is not applied to the side surface half 15A, but only to the side surface half 15B. As a result, the joining area C7 of the contact surface 10C joins with another joining area C7 of the contact surface 10C and an area of ​​the non-contact surface 10D where no joining area exists. The joining area C7 of the contact surface 10C forms the seal portion 40 (side seal) of the side surface 15 of the packaging bag 10.

[0076] Furthermore, the bonding area C8 of the contact surface 10C is provided on the side surface half 16B on the bottom surface 12 side of the packaging bag 10, but not on the side surface half 16A on the top surface 11 side of the packaging bag 10. In other words, the heat sealing agent is not applied to the side surface half 16A, but only to the side surface half 16B. As a result, the bonding area C8 of the contact surface 10C is bonded to another bonding area C8 of the contact surface 10C and to an area of ​​the non-contact surface 10D where no bonding area exists. The bonding area C8 of the contact surface 10C forms the seal portion 50 (side seal) of the side surface 16 of the packaging bag 10.

[0077] In the second embodiment, the effects of the first embodiment described above can be obtained, and in addition, the area to be coated with the heat sealing agent can be reduced, so that the amount of plastic can be further reduced.

[0078] The present disclosure will be specifically described below using examples. The examples and comparative examples were evaluated by the following tests.

[0079] <Package (Test Piece)> As a test piece, a package 100 was prepared in which a sheet laminate SL, in which a plurality of sheets S were laminated, was packaged in a packaging bag 10, as shown in FIG.

[0080] [Sheet stack (packaged item)] The sheet stack SL is a stack of paper towels (manufactured by Daio Paper Co., Ltd., Elleair Plus Kirei Compact Type, 2 ply, 200 sets, basis weight 14.5 g / m) in which sheets S are alternately folded and stacked so that they can be pulled out one by one in a pop-up style. ２ , length of sheet laminate SL: 186 mm, length of packaging bag 10: 192 mm, thickness of packaging bag: 40 μm) was used.

[0081] [Packaging bag] The packaging bag 10 has a basis weight of 50 g / m ２ The packaging bag 10 was made of unglazed kraft paper (paper base material) coated with a heat sealant. A track-shaped opening was provided on the top surface 11 of the packaging bag 10.

[0082] [Heat-sealing agent] Ethylene-vinyl acetate copolymer (EVA) was used as the heat-sealing agent.

[0083] [Heat Sealing] The paper substrate coated with the heat sealing agent was heated and pressed.

[0084] <Front Sealability> The sealability at the front of the packaging bag (front sealability) of the test specimen was evaluated according to the following criteria.

[0085] [Evaluation criteria] Excellent: Adhesion was possible. Good: Adhesion was possible, although the adhesive strength was weak. Poor: Adhesion was not possible.

[0086] <Side sealability> The sealability of the side of the packaging bag (side sealability) of the test specimen was evaluated according to the following criteria: [Evaluation criteria] Excellent: Adhesion was possible. Good: Adhesion was possible, although the adhesive strength was weak. Poor: Adhesion was not possible.

[0087] <Stickness of Packaged Item> The sticking of the sheet laminate SL on the test specimen was evaluated according to the following criteria: [Evaluation criteria] Good: No sticking Poor: Sticking

[0088] Examples and comparative examples will be described below.

[0089] 6 to 8, a heat-sealing agent was applied (partially coated) to both sides of a paper substrate (only bonding areas C1, C3, and C4 of contact surface 10C that contacts sheet laminate SL and bonding areas C2, C5, and C6 of non-contact surface 10D that does not contact sheet laminate SL on the opposite side of contact surface 10C). The evaluation results of Example 1 are shown in Table 1.

[0090] 7, a heat-sealing agent was applied (partially coated) to the surface of the paper substrate (only the bonding areas C2, C5, and C6 of the non-contact surface 10D that does not contact the sheet laminate SL on the opposite side to the contact surface 10C that contacts the sheet laminate SL). The evaluation results of Example 2 are shown in Table 1.

[0091] 6, a heat sealant was applied (partially coated) to the back surface of the paper substrate (only the bonding areas C1, C3, and C4 of the contact surface 10C that comes into contact with the sheet laminate SL). The evaluation results of Example 3 are shown in Table 1.

[0092] [Comparative Example 1] A heat-sealing agent was applied (fully coated) to both sides of a paper substrate (the entire surface of the contact surface 10C that contacts the sheet laminate SL and the entire surface of the non-contact surface 10D that does not contact the sheet laminate SL on the opposite side of the contact surface 10C). The evaluation results of Comparative Example 1 are shown in Table 1.

[0093] Comparative Example 2 A heat sealing agent was applied (overall coating) to the back surface of the paper substrate (the entire non-contact surface 10D that comes into contact with the sheet laminate SL). The evaluation results of Comparative Example 2 are shown in Table 1.

[0094]

[0095] As can be seen from Table 1, packages in which heat sealing agent was applied to the joining areas C1, C3, C4 where the paper substrates are joined together, excluding the contact area CR where the sheet laminate SL comes into contact with the paper substrate on the contact surface 10C of the paper substrate, and / or to the joining areas C2, C5, C6 where the paper substrates are joined together, excluding the exposed area ER where the paper substrate is exposed on the non-contact surface 10D of the paper substrate, had good front sealing properties, side sealing properties, and adhesion of the packaged item (Examples 1 to 3).

[0096] On the other hand, a package in which the heat sealant was applied to the entire contact surface 10C of the paper substrate and the entire non-contact surface 10D of the paper substrate showed poor adhesion of the packaged item (Comparative Example 1).Furthermore, a package in which the heat sealant was applied only to the entire non-contact surface 10D of the paper substrate showed poor side sealing properties and poor adhesion of the packaged item (Comparative Example 2).

[0097] The above-disclosed embodiments include, for example, the following aspects.

[0098] A first aspect of the present disclosure is a packaging body including a paper substrate for packaging an item to be packaged, wherein the paper substrate has a contact surface that contacts the item to be packaged and a non-contact surface opposite the contact surface that does not contact the item to be packaged, and a heat sealant is applied to the contact surface in the joining area where the paper substrates are joined together, excluding the contact area where the item to be packaged contacts the paper substrate.

[0099] In the first aspect, a heat sealant is applied to the contact surface of the paper substrate that comes into contact with the packaged item, excluding the contact area where the packaged item comes into contact with the paper substrate, in the joining area where the paper substrates are joined together, thereby preventing the heat sealant from adhering to the packaged item when the package is sealed. Therefore, according to the first aspect, it is possible to reduce the amount of plastic used without compromising the quality of the packaged item.

[0100] Furthermore, although a resin is used as the heat-sealing agent, the amount of resin used can be reduced by applying the heat-sealing agent only to the joining area where the paper substrates join together on the contact surface that comes into contact with the packaged item. From this perspective, the first aspect also allows for a reduction in the amount of plastic used.

[0101] A second aspect of the present disclosure is the packaging body according to the first aspect, in which a heat sealant is applied to the joining area of ​​the non-contact surface where the paper base materials are joined, excluding the exposed area where the paper base material is exposed.

[0102] In the second aspect, a heat sealant is applied to the contact surface of the paper substrate that comes into contact with the packaged item and the non-contact surface that does not come into contact with the packaged item, which prevents the heat sealant from adhering to the packaged item when the package is sealed. Therefore, in the second aspect, the heat sealant is applied not only to the contact surface of the paper substrate that comes into contact with the packaged item, but also to the non-contact surface of the paper substrate that does not come into contact with the packaged item, which increases the seal strength of the package.

[0103] In addition, in the second aspect, a heat sealant is applied to the non-contact surface of the paper base material that does not come into contact with the packaged item, in the joining area where the paper base materials are joined together, excluding the exposed area where the paper base material is exposed, thereby preventing the heat sealant from being exposed to the outside of the package.

[0104] Therefore, in the second aspect, it is possible to prevent the packaging body during production from adhering to the production line, the packaging body from adhering to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging body.

[0105] A third aspect of the present disclosure is a packaging body including a paper substrate for packaging an item to be packaged, wherein the paper substrate has a contact surface that comes into contact with the item to be packaged and a non-contact surface opposite the contact surface where the paper substrate is exposed, and a heat sealing agent is applied to a joining area of ​​the non-contact surface where the paper substrates are joined together, excluding an exposed area where the paper substrate is exposed.

[0106] In the third aspect, a heat sealant is applied to the paper substrate on the non-contact side opposite to the contact side that comes into contact with the packaged item, so that the heat sealant does not adhere to the packaged item when the package is sealed. Therefore, according to the third aspect, it is possible to reduce the amount of plastic used without compromising the quality of the packaged item.

[0107] In addition, in the third aspect, a heat sealant is applied to the non-contact surface of the paper base material that does not come into contact with the packaged item, in the joining area where the paper base materials are joined together, excluding the exposed area where the paper base material is exposed, thereby preventing the heat sealant from being exposed to the outside of the package.

[0108] Therefore, in the third aspect, it is possible to prevent the packaging body during production from adhering to the production line, the packaging body from adhering to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging body.

[0109] A fourth aspect of the present disclosure is the packaging body according to any one of the first to third aspects, wherein the joining region is only a region where the contact surface and the non-contact surface are joined.

[0110] In the fourth aspect, the joining area where the paper substrates are joined is the area where the contact surface of the paper substrate that comes into contact with the packaged item joins with the non-contact surface of the paper substrate opposite the contact surface that does not come into contact with the packaged item, so that both end edges of the paper substrate rolled into a cylindrical shape can be overlapped and joined around the packaged item, making it easy to package the packaged item with the paper substrate and enabling compact packaging.

[0111] A fifth aspect of the present disclosure is the packaging body according to any one of the first to fourth aspects, wherein the joining region is only a region where the contact surfaces are joined to each other.

[0112] In the fifth aspect, the joining area where the paper substrates are joined is the area where the contact surfaces of the paper substrates that come into contact with the packaged product are joined, making it possible to pillow-package the packaged product using the paper substrates. Furthermore, by combining the joining of the contact surfaces of the paper substrates with the joining of the contact and non-contact surfaces of the paper substrates described above, it becomes possible to caramel-package the packaged product using the paper substrates.

[0113] A sixth aspect of the present disclosure is the packaging body according to any one of the first to fifth aspects, wherein the object to be packaged is caramel-packaged.

[0114] In the sixth aspect, the object to be packaged is caramel-wrapped, which allows the object to be packaged compactly. Furthermore, by caramel-wrapping the object to be packaged, the seal strength of the package can be increased.

[0115] A seventh aspect of the present disclosure is a packaging body according to any one of the first to sixth aspects, wherein the packaged object is a plurality of stacked sheets of sanitary thin paper.

[0116] In the seventh aspect, as described above, it is possible to prevent the heat sealing agent from adhering to the packaged object when sealing the package, so that even if the packaged object is multiple stacked sheets of sanitary tissue paper, the sheets of sanitary tissue paper can be pulled out one by one from an outlet or the like while they are packaged and used.

[0117] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

[0118] This application claims priority based on Japanese Patent Application No. 2024-087625, filed on May 30, 2024, the entire contents of which are incorporated herein by reference.

[0119] 100 Package 10 Packaging bag (base material) 10A Edge 10B Edge 10C Contact surface 10D Non-contact surface 11 Top surface 12 Bottom surface 13 Front surface 14 Back surface 15 Side surface 15A Half of side surface 15B Half of side surface 16 Side surface 16A Half of side surface 16B Half of side surface 20 Dispensing opening 30 Sealed portion (front seal) 40 Sealed portion (side seal) 50 Sealed portion (side seal) CR Contact area ER Exposed area C1, C2, C3, C3, C4, C5, C6, C7, C8 Joined area S Sheet SL Sheet laminate SD Stacking direction

Claims

1. A packaging body including a paper substrate for packaging an item to be packaged, wherein the paper substrate has a contact surface that comes into contact with the item to be packaged and a non-contact surface opposite the contact surface that does not come into contact with the item to be packaged, and a heat sealant is applied to the contact surface in the joining area where the paper substrates are joined together, excluding the contact area where the item to be packaged comes into contact with the paper substrate.

2. The package according to claim 1, wherein a heat sealant is applied to the joining area of ​​the non-contact surface where the paper base materials are joined, excluding the exposed area where the paper base material is exposed.

3. A packaging body including a paper substrate for packaging an item to be packaged, wherein the paper substrate has a contact surface that comes into contact with the item to be packaged and a non-contact surface on the opposite side of the contact surface where the paper substrate is exposed, and a heat sealant is applied to the joining areas of the non-contact surface where the paper substrates are joined together, excluding the exposed areas where the paper substrates are exposed.

4. A package according to any one of claims 1 to 3, wherein the joining region is only the region where the contact surface and the non-contact surface are joined.

5. A package according to any one of claims 1 to 3, wherein the joining region is only the region where the contact surfaces join together.

6. A package according to any one of claims 1 to 3, wherein the packaged items are caramel-wrapped.

7. A package according to any one of claims 1 to 3, wherein the packaged item is a stack of multiple sheets of sanitary tissue paper.

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