Package body

Abstract

To provide a package body capable of reducing plastic in volume without damaging quality of a body to be packaged.SOLUTION: According to a package body comprising a paper base material for packaging a body to be packaged; the package body is characterized in that the paper base material comprises a contact face coming into contact with the body to be packaged, and a non-contact face not coming into contact with the body to be packaged on an opposite side of the contact face; and a heat seal agent is coated in a connection area where the paper base material and the paper base material, excluding a contact area where the body to be packaged comes into contact with the paper base materia, on the contact face, are in connect with each other.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a package. [Background technology]

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

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-183034 [Patent Document 2] Japanese Patent Application Publication No. 2018-177364 [Patent Document 3] Japanese Patent Publication No. 2021-123339 Summary of the Invention [Problem to be solved by the invention]

[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 invention is to provide a package that can reduce the amount of plastic used without impairing the quality of the packaged item. [Means for solving the problem]

[0006] A first aspect of the present invention 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] In the first aspect, a heat sealant is applied to the contact area 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, 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.

[0008] Furthermore, although a resin is used as a heat sealant, the amount of resin used can be reduced by applying the heat sealant 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.

[0009] A second aspect of the present invention is a 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.

[0010] In the second embodiment, 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, on the opposite side, so that the heat sealant does not adhere to the packaged item when the package is sealed. Therefore, in the second embodiment, 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.

[0011] 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.

[0012] Therefore, in the second aspect, it is possible to prevent the packaging from adhering to the production line during production, the packaging from sticking to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging.

[0013] A third aspect of the present invention 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 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.

[0014] In the third aspect, a heat sealant is applied to the paper substrate on the non-contact side opposite 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.

[0015] 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.

[0016] Therefore, in the third aspect, it is possible to prevent the packaging from adhering to the production line during production, the packaging from sticking to each other after production, and the heat sealing agent from adhering to the user's fingers when the user grasps the packaging.

[0017] A fourth aspect of the present invention 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.

[0018] 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 around the packaged item can be overlapped and joined, making it easy to wrap the packaged item with the paper substrate and enabling compact packaging.

[0019] A fifth aspect of the present invention 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.

[0020] 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. Also, 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.

[0021] A sixth aspect of the present invention is the package according to any one of the first to fifth aspects, wherein the packaged object is caramel-packaged.

[0022] 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.

[0023] A seventh aspect of the present invention is a package according to any one of the first to sixth aspects, wherein the packaged object is a plurality of stacked sheets of sanitary thin paper.

[0024] In the seventh aspect, as described above, it is possible to prevent the heat sealing agent from adhering to the packaged item when the package is sealed, so that even if the packaged item 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. [Effects of the Invention]

[0025] 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. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a diagram showing a packaging body according to a first embodiment. FIG. [Figure 2] FIG. 2 is a diagram showing a sheet of sanitary thin paper contained in a packaging bag. [Figure 3] FIG. 2 is a front view of the packaging body of FIG. 1. [Figure 4] FIG. 2 is a view of the package of FIG. 1 as seen from one side. [Figure 5] 2 is a view of the packaging body of FIG. 1 as seen from the other side. FIG. [Figure 6] FIG. 2 is a view of the unfolded package of FIG. 1 as seen from the inside. [Figure 7] FIG. 2 is a view of the package of FIG. 1 as seen from the outside in an unfolded state. [Figure 8] This is a composite diagram of FIGS. 6 and 7. [Figure 9] FIG. 10 is a composite view of an unfolded package of the second embodiment, showing both an inside view and an outside view. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Common parts in the drawings will be designated by the same reference numerals and their explanations may be omitted. Also, the scale of each component in each drawing may differ from the actual scale.

[0028] In this specification, directions in the drawings are explained using a three-dimensional Cartesian coordinate system with three axial directions (X, Y, and Z). 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.

[0029] 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.

[0030] First Embodiment

[0031] Fig. 1 is a diagram showing a package of a first embodiment, and 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.

[0032] The packaging body 100 has a packaging bag 10 for packaging an item to be packaged.

[0033] The object to be packaged is not particularly limited. In this embodiment, a sheet stack SL is packaged in a 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.

[0034] 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.

[0035] The dimensions of the sheet S (sheet laminate SL) can be about 150 to 250 mm in the longitudinal direction (X direction) of the packaging bag 10, about 70 to 150 mm in the width direction (Y direction) perpendicular to the longitudinal direction (X direction) of the packaging bag 10, and about 20 to 100 mm in the height direction (Z direction). Such a tissue paper laminate can be manufactured, for example, by a rotary or multi-stand interfolder.

[0036] 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.

[0037] 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.

[0038] 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, for example, a one-ply sheet has a quadrangular (rectangular, square, etc.) outline shape when folded.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The basis weight of the sheet S is not particularly limited, but in the case of paper, it is 5 g / m depending on the number of plies. 2 More than 80g / m 2 and preferably 10 g / m 2 More than 60g / m 2 Less than 10 g / m, more preferably 2 More than 45g / m 2 In the case of nonwoven fabric, the density is 20 g / m 2 More than 100g / m 2 The following is desirable: Basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0043] The thickness of the paper sheet is not particularly limited, and can be the paper thickness measured under the environment 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.

[0044] 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.

[0045] 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.

[0046] The paper constituting the paper base material is, for example, agglutinated plant fibers (pulp). The pulp composition of 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 ratio of softwood pulp to hardwood pulp is higher. Furthermore, recycled paper pulp may also be used as the pulp.

[0047] 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.

[0048] Examples of unbleached wrapping paper include unbleached kraft paper with both sides glazed, ribbed kraft paper, and unbleached kraft paper with one side glazed.

[0049] Examples of bleached wrapping paper include pure white roll paper, double glazed bleached kraft paper, single glazed bleached kraft paper, and thin construction paper.

[0050] As the paper used for the paper substrate, unglazed kraft paper is preferred, and unbleached wrapping paper is preferred.

[0051] The basis weight of the paper constituting the paper substrate is not limited, but is preferably 20 g / m 2 More than 80g / m 2 More preferably, it is 30 g / m or less. 2 More than 70g / m 2 or less, more preferably 40 g / m 2 More than 60g / m 2 The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0052] The thickness of the paper constituting the paper substrate is not limited, but is preferably 20 μm or more and 300 μm or less, more preferably 30 μm or more and 200 μm or less, and even more preferably 40 μm or more and 180 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

[0053] 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.

[0054] 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.

[0055] 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%.

[0056] 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.

[0057] 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 about 150 to 250 mm, the length of the packaging bag 10 in the lateral 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. The dimensions of the packaging bag 10 are those when a sheet laminate SL is contained in the packaging bag 10, as shown in Figures 1 and 2.

[0058] The packaging form of the packaging bag 10 is not particularly limited, and for example, as shown in Fig. 3, it is possible to employ a paper substrate having a predetermined length formed into a cylindrical shape by joining edges 10A, 10B, and then sealing the open end of the cylindrical paper substrate (pillow packaging), a paper substrate having both ends 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.

[0059] 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.

[0060] 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.

[0061] 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 derivatives thereof, as well as mixtures thereof.

[0062] 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.

[0063] 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 in water with ammonia under heating and stirring.

[0064] 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.

[0065] The method for applying the heat-sealing agent is not particularly limited, and any known coating method can be used. For example, known coating machines 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, and a gravure coater can be used for applying the heat-sealing agent.

[0066] The coating amount of heat sealant (solid content equivalent) is 1.5 g / m 2 More than 10.0g / m 2 Less than 2.0 g / m is preferred 2 More than 8.0g / m 2 Less than 3.0 g / m is more preferable. 2 More than 6.0g / m 2 More preferably, 3.6 g / m 2 More than 5.4g / m 2 The 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.

[0067] An outlet 20 is formed on the top surface 11 of the packaging bag 10. The outlet 20 is configured so that the sheet S of the sheet stack SL can be pulled out. The outlet 20 is configured as an opening. The opening that forms the outlet 20 may be configured by tearing perforations (intermittent cuts) not shown.

[0068] 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 shape, a gourd shape (or a dumbbell shape) in a plan view. Here, the gourd shape (or a dumbbell shape) refers to an ellipse with a narrowed center. Among these, the straight line, ellipse, truck shape, and gourd shape (or a dumbbell shape) are preferred, and the truck shape and gourd shape (or a dumbbell shape) are more preferred.

[0069] 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.

[0070] Furthermore, the length of the outlet 20 in the short side 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 side 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.

[0071] <Coating area of ​​heat sealant> Fig. 6 is a view of the unfolded package of Fig. 1 as seen from the inside, Fig. 7 is a view of the unfolded package of Fig. 1 as 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.

[0072] 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 opposite side 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.

[0073] 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.

[0074] 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.

[0075] 6 to 8, the bonding areas C1 and C2 are areas where the contact surface 10C and the non-contact surface 10D are bonded to each other. Also, the bonding areas C3, C4, C5, and C6 include areas where the contact surface 10C and the non-contact surface 10D are bonded to each other and areas where the contact surfaces 10C are bonded to each other, as shown in FIGS.

[0076] 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 part of the seal portion 50 (side seal) of the side surface 16.

[0077] Furthermore, the joining area C3 of the contact surface 10C joins with another joining area C3 of the contact surface 10C and a joining area C5 of the non-contact surface 10D. The joining area C3 of the contact surface 10C and C5 of the non-contact surface 10D form a seal portion 40 (side seal) of the side surface 15 of the packaging bag 10.

[0078] Furthermore, the joining area C4 of the contact surface 10C joins with another joining area C4 of the contact surface 10C and a joining area C6 of the non-contact surface 10D. The joining area C4 of the contact surface 10C and C6 of the non-contact surface 10D form a seal portion 50 (side seal) of the side surface 16 of the packaging bag 10.

[0079] The effects of this embodiment will be described below. In this embodiment, as described above, a heat sealant is applied to the contact areas C1, C3, and C4 where the paper base materials are joined together, excluding the contact area CR where the sheet laminate SL contacts the paper base material, of the contact surface 10C of the paper base material constituting the packaging bag 10 that comes into contact with the sheet laminate SL, thereby preventing the heat sealant from adhering to the sheet laminate SL when sealing the packaging body 100. Therefore, according to this embodiment, it is possible to reduce the amount of plastic without compromising the quality of the sheet laminate SL.

[0080] 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.

[0081] 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 the seal strength of the package 100 can be increased.

[0082] 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.

[0083] 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.

[0084] In this embodiment, as described above, the heat sealing agent is applied to the contact surface 10C of the paper base material that comes into contact with the sheet laminate SL and the non-contact surface 10D that does not come into contact with the sheet laminate SL, which is on the opposite side, so that the heat sealing agent does not adhere to the sheet laminate 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 laminate SL.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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, making it possible to pillow-package 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-package the sheet stack SL using the paper base materials.

[0089] 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.

[0090] 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 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.

[0091] Second Embodiment Figure 9 is a combined view of the unfolded package of the second embodiment, viewed from the inside and the outside. In Figure 9, parts common to those in Figure 8 are designated by the same or corresponding reference numerals as in Figure 9, and description thereof will be omitted.

[0092] 9, in the packaging body 100 of the second embodiment, a heat sealing agent is applied to joining areas 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 areas excluding the contact area CR where the sheet laminate SL comes into contact.

[0093] 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.

[0094] Furthermore, the joining 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 joining area C8 of the contact surface 10C joins with another joining area C8 of the contact surface 10C and an area of ​​the non-contact surface 10D where no joining area exists. The joining area C8 of the contact surface 10C forms the seal portion 50 (side seal) of the side surface 16 of the packaging bag 10.

[0095] 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. [Example]

[0096] The present invention will be specifically described below using examples. The examples and comparative examples were evaluated by the following tests.

[0097] <Packaging (test specimen)> As a test sample, 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.

[0098] [Sheet laminate (packaged item)] The sheet stack SL is a stack of paper towels (Daioh Paper Co., Ltd., Elleair Plus Kirei Compact Type, 2 ply, 200 sheets, basis weight 14.5 g / m) in which sheets S are folded alternately and stacked so that they can be pulled out one by one in a pop-up style. 2 The sheet laminate SL had a length of 186 mm, the packaging bag 10 had a length of 192 mm, and the packaging bag had a thickness of 40 μm.

[0099] [Packaging bag] The packaging bag 10 has a basis weight of 50 g / m 2 The unglazed kraft paper (paper base material) was coated with a heat seal agent. A track-shaped take-out opening (opening) was provided on the top surface 11 of the packaging bag 10.

[0100] [Heat sealing agent] Ethylene-vinyl acetate copolymer (EVA) was used as the heat sealant.

[0101] [Heat sealing] The paper substrate coated with the heat sealing agent was heated and pressed together.

[0102] <Front sealing performance> The test specimens were evaluated for front sealability of the packaging bag according to the following criteria.

[0103] [Evaluation criteria] Excellent: Adhesion was successful Good: The adhesive strength was weak, but it was able to be adhered. Defective: Unable to adhere

[0104] <Side sealing performance> The test specimens were evaluated for the sealability of the sides of the packaging bag (side sealability) according to the following criteria. [Evaluation criteria] Excellent: Adhesion was successful Good: The adhesive strength was weak, but it was able to be adhered. Defective: Unable to adhere

[0105] <Packaged item sticking> The test specimens were evaluated for adhesion of the sheet laminate SL according to the following criteria. [Evaluation criteria] Good: No sticking Defect: Sticking

[0106] Examples and comparative examples will be described below.

[0107] [Example 1] 6 to 8, a heat-sealing agent was applied (partially coated) to both sides 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 and the bonding areas C2, C5, and C6 of the non-contact surface 10D that does not come into contact with the sheet laminate SL on the opposite side of the contact surface 10C). The evaluation results of Example 1 are shown in Table 1.

[0108] [Example 2] As shown in Fig. 7, a heat sealant 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, opposite the contact surface 10C that contacts the sheet laminate SL). The evaluation results of Example 2 are shown in Table 1.

[0109] [Example 3] As shown in Fig. 6, a heat sealing agent 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.

[0110] [Comparative Example 1] A heat-sealing agent was applied (fully coated) to both sides of the paper substrate (the entire surface of the contact surface 10C that comes into contact with the sheet laminate SL and the entire surface of the non-contact surface 10D that does not come into contact with 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.

[0111] Comparative Example 2 The back surface of the paper substrate (the entire non-contact surface 10D that comes into contact with the sheet laminate SL) was coated with a heat sealing agent (whole surface coating). The evaluation results of Comparative Example 2 are shown in Table 1.

[0112] [Table 1]

[0113] 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 on the contact surface 10C of the paper substrate, excluding the contact area CR where the sheet laminate SL comes into contact with the paper substrate, and / or to the joining areas C2, C5, C6 where the paper substrates are joined together on the non-contact surface 10D of the paper substrate, excluding the exposed area ER where the paper substrate is exposed, had good front sealing properties, side sealing properties, and adhesion of the packaged item (Examples 1 to 3).

[0114] 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).

[0115] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims. [Explanation of symbols]

[0116] 100 packages 10 Packaging bag (base material) 10A edge 10B edge 10C contact surface 10D non-contact surface 11 Top 12 Bottom 13 Front 14 Back 15 Side 15A side half 15B side half 16 Side 16A side half 16B side half 20 Outlet 30 Seal part (front seal) 40 Seal part (side seal) 50 Seal part (side seal) CR contact area ER exposed area C1, C2, C3, C3, C4, C5, C6, C7, C8 junction area S seat SL Sheet laminate SD stacking direction

Claims

1. A packaging body including a paper substrate for packaging an item to be packaged, The paper substrate has a contact surface that contacts the packaged item and a non-contact surface that does not contact the packaged item on the opposite side of the contact surface, A heat sealant is applied to the contact area of ​​the contact surface where the paper base materials are joined together, excluding the contact area where the packaged object comes into contact with the paper base material. packaging.

2. a heat sealing agent is applied to a joining area of ​​the non-contact surface where the paper base materials are joined, excluding an exposed area where the paper base materials are exposed; The package of claim 1.

3. A packaging body including a paper substrate for packaging an item to be packaged, The paper substrate has a contact surface that comes into contact with the packaged item and a non-contact surface on the opposite side to the contact surface where the paper substrate is exposed, a heat sealing agent is applied to a joining area of ​​the non-contact surface where the paper base materials are joined, excluding an exposed area where the paper base materials are exposed; packaging.

4. The bonding area is only an area where the contact surface and the non-contact surface are bonded. The package according to any one of claims 1 to 3.

5. The bonding area is only the area where the contact surfaces are bonded to each other. The package according to any one of claims 1 to 3.

6. The packaged object is caramel-packaged. The package according to any one of claims 1 to 3.

7. The packaged object is a plurality of stacked sheets of sanitary thin paper. The package according to any one of claims 1 to 3.

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