JP2023048900A - toilet roll package - Google Patents

Abstract

To provide a toilet roll package in which: a toilet roll is packed with a packaging base material including at least a paper base material; the form thereof after packaging is favorable even with a hot melt adhesive adheres thereto; defectives of toilet roll are hardly generated; and the packaging base material is caused to adhered properly, and easy to peel.SOLUTION: Disclosed is a toilet roll package in which two, four or six toilet rolls are packed with a packaging base material including at least a paper base material. A basis weight of the packaging base material is 40 g/m2 or more but 105 g/m2 or less. The toilet rolls are arranged in one, two or three rows so that both edge faces of all rows are aligned in the case of two or three rows. At least one of a top face part and a bottom face part of the package comprises adhesion parts in which a hot melt adhesive is coated on flap parts interfolding the end part of the base material to cause the flap parts to each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a toilet roll package suitable for packaging paper products, particularly toilet rolls.

In recent years, there has been a demand for volume reduction of plastics, mainly for base materials used for packaging, containers, and the like.

For example, while copy paper is wrapped with a paper-based packaging material, toilet paper (toilet roll) is soft (not stable in shape), so it is not wrapped. In some cases, the packaging base material may be bent at unintended locations, resulting in poor shape after packaging. In addition, since paper is thicker and stiffer than film, the paper is less likely to bend at a predetermined position.

As a prior art document of an invention related to a toilet roll package, for example, Patent Document 1 discloses a method for manufacturing a toilet roll package in which a predetermined number of toilet roll packs are collected and wrapped in a caramel-like paper sheet. A paper sheet made mainly of pulp is used, and an easy-to-cut line such as a perforation and/or an unpacking means consisting of an opening tape is provided in the center of the sheet in the longitudinal direction (paper flow direction at the time of manufacture). After the assembly of the roll pack is caramel-wrapped with a paper sheet cut to a predetermined size, the front and rear overlapped ends of the paper sheet are adhered on the upper surface of the caramel-like package, and a recyclable adhesive is applied. A method of manufacturing a toilet roll wrapper is disclosed which includes sealing the side overlapping edges of the caramel wrapper with tape.

JP 2003-054504 A

When a toilet roll is wrapped using heat-seal paper having an adhesive layer (heat-seal layer) over the entirety and heat-sealed, the overlapping packaging substrates are bonded to each other through the adhesive portion after packaging, and the toilet roll is Although it is left as it is, depending on the case (how heat is transferred), the inner packaging base material and the toilet roll may adhere to each other via the adhesive portion, resulting in a defective product.

Therefore, it is conceivable to use a hot-melt adhesive to bond the packaging substrate so as not to perform heat sealing. However, when hot-melt adhesive is used, the hot-melt adhesive-applied adhesive portion swells, and when the toilet roll packages are packed in corrugated cardboard, the toilet roll packages are compressed to each other, causing the adhesive portions to become uneven. The toilet roll packaging body may be pressed against the surface of the toilet roll and leave marks, resulting in a defective product.

On the other hand, in order to prevent the toilet roll from leaving marks at the adhesive portion, if the basis weight of the packaging base material is increased and the adhesive portion is not locally compressed by other toilet roll packaging bodies, the trace will be Although it becomes difficult to stick, the hardening of the packaging material makes it difficult for the packaging material to bend at a predetermined position, resulting in poor shape after packaging.

If the amount of the hot-melt adhesive is reduced, the marks are less likely to be left, but the adhesiveness of the packaging substrate deteriorates, and the packaging may be partially removed, resulting in defective products. In addition, when the area of the adhesive portion is increased, marks are likely to be left and the packaging base material may be difficult to peel off, resulting in a defective product.
Therefore, when a toilet roll is packaged with a packaging base material including a paper base material, it is difficult to ensure that defective products are less likely to occur and that the packaging property is good.

The present invention has been made in view of such circumstances, and even if a toilet roll is packaged with a packaging base material containing at least a paper base material and adhered with a hot-melt adhesive, the shape after packaging is good. To provide a toilet roll package which is less likely to produce defective toilet rolls, has a packaging base material that is appropriately adhered, and is easily peeled off.

The inventors of the present invention conducted extensive research in view of the above problems. As a result, the grammage of the packaging base material is specified, and a hot-melt adhesive is applied to the flap part where the end part of the packaging base material is folded in at least one of the top surface and the bottom part of the package, and adhesion is performed. By providing the part, even if the toilet roll is packaged with a packaging base material containing at least a paper base material and adhered with a hot melt adhesive, the shape after packaging is good, and defective toilet roll products are less likely to occur. The inventors have found that a toilet roll package having a base material that is appropriately adhered and which can be easily peeled off can be obtained, and that the above problems can be solved, leading to the completion of the present invention.
Specifically, the present invention provides the following.

(1) A first aspect of the present invention is a package in which two, four or six toilet rolls are packaged with a packaging base material containing at least a paper base material, wherein the basis weight of the packaging base material is is 40 g/m ² or more and 105 g/m ² or less, and the toilet roll has one, two, or three rows in a direction perpendicular to its axial direction, and two or three rows, any The rows are also arranged so that both end faces are aligned, and at least one of the top surface part and the bottom surface part of the package has an adhesive part that applies a hot melt adhesive to the flap part that folds the end part of the packaging base material and adheres it. A toilet roll package characterized by:
(2) A second aspect of the present invention is the toilet roll package according to (1), characterized in that the adhesive part has a spiral shape.
(3) A third aspect of the present invention is the toilet roll package described in (2), characterized in that the width of the adhesive portion is 3 mm or more and 40 mm or less.
(4) A fourth aspect of the present invention is the toilet roll package according to (2) or (3), characterized in that the material of the hot-melt adhesive is rubber. .
(5) A fifth aspect of the present invention is the toilet roll package according to (1), characterized in that the adhesive part has a bead shape.
(6) A sixth aspect of the present invention is the toilet roll package according to (5), characterized in that the width of the adhesive portion is 1 mm or more and 20 mm or less.
(7) A seventh aspect of the present invention is the toilet roll package according to (5) or (6), characterized in that the material of the hot-melt adhesive is olefin. .
(8) An eighth aspect of the present invention is the toilet roll package according to any one of (1) to (7), wherein the toilet roll has a roll density of 0.10 g/cm ³ or more and 0.33 g. /cm ³ or less.
(9) A ninth aspect of the present invention is the toilet roll package according to any one of (1) to (8), wherein the package is a caramel package.
(10) A tenth aspect of the present invention is the toilet roll package according to any one of (1) to (9), wherein when the package is packed in a cardboard box, the axial direction of the toilet roll The packaging body is arranged and packed so that the bottom surface of the cardboard box is perpendicular to the bottom surface of the cardboard box.

According to the present invention, even if a toilet roll is packaged with a packaging base material containing at least a paper base material and adhered with a hot melt adhesive, the shape after packaging is good, and defective toilet roll products are less likely to occur. It is possible to provide a toilet roll package that has a base material that is appropriately adhered and that can be easily peeled off.

It is a perspective view showing an example of a toilet roll package concerning one embodiment of the present invention. It is the top view which looked at the toilet roll package of FIG. 1 from the top surface side. It is the top view which looked at the toilet roll package which concerns on another embodiment of this invention from the top surface side. 1 is a perspective view showing an example of arrangement of toilet rolls packaged in the toilet roll package of the present invention; FIG.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings, but these are listed for the purpose of illustration and are not intended to limit the present invention. .

1. 1. Toilet roll package FIG. 1 is a perspective view showing an example of the toilet roll package (hereinafter also simply referred to as "package") of the present invention. As shown in FIG. 1, the packaging body 1 of the present invention is a packaging base material 10 containing at least a paper base material, and two, four or six (four in FIG. 1) toilet rolls 11 are packaged. there is The packaging form of the toilet roll 11 will be described later.
In the package 1, the packaging base material 10 may cover a part of the toilet roll 11 instead of the whole, and the toilet roll 11 may not be sealed (not shown). Moreover, when the package 1 is packed in a cardboard box, it is preferable that the package 1 is arranged and packed so that the axial direction L of the toilet roll 11 is perpendicular to the bottom surface of the cardboard box.

In addition, the package 1 is provided with an adhesion part 12 that applies a hot-melt adhesive to the flap part 13 that folds the end of the packaging base material 10 on at least one of the top surface part and the bottom part of the package 1 and adheres them. . To provide a packaging body 1 which has a good shape after packaging, hardly produces defective toilet rolls 11, and has a packaging base material 10 which is appropriately bonded and easily peeled off by forming the bonding part 12 on the flap part 13. - 特許庁can be done. It is preferable that both the top and bottom surfaces of the packaging body 1 are provided with adhesive portions 12 that adhere hot-melt adhesive to flap portions 13 in which the ends of the packaging base material 10 are folded. In addition, the adhesive portion 12 includes a first adhesive portion 121 and a second adhesive portion 122, and the flap portion 13 includes a first flap portion 131 and a second flap portion 132, but the bonding process of the flap portion 13 by the adhesive portion 12 is will be described later.

Here, it is preferable that the shape of the adhesive part 12 is a spiral shape as shown in FIG. 1 and FIG. 2 which shows the package 1 of FIG. Due to the spiral shape, the shape after packaging is good, the toilet roll 11 is less likely to be defective, and the package 1 can be easily peeled off with the packaging base material 10 appropriately adhered. The material of the hot-melt adhesive used to form the adhesive portion 12 is not particularly limited, and known materials such as ethylene vinyl acetate, rubber, polyamide, olefin, and polyurethane can be used. Among these, rubber-based or olefin-based materials are preferable, and rubber-based materials are more preferable.
The width SP of the bonding portion 12 is preferably 3 mm or more and 40 mm or less, more preferably 6 mm or more and 33 mm or less, and even more preferably 10 mm or more and 25 mm or less. If the width SP is less than 3 mm, the adhesiveness of the hot-melt adhesive becomes too weak, and the packaging substrate 10 may be unintentionally peeled off. If the width SP exceeds 40 mm, the adhesiveness of the hot-melt adhesive becomes too strong, making it difficult to peel off the packaging substrate 10 .

The shape of the adhesive part 12 may be a bead shape (single line shape) like the adhesive part 12 in the package 1 according to another embodiment shown in FIG. In the case of a bead shape, the width BP of the bonding portion 12 is preferably 1 mm or more and 20 mm or less, more preferably 2 mm or more and 15 mm or less, and even more preferably 3 mm or more and 10 mm or less. If the width BP is less than 1 mm, the adhesiveness of the hot-melt adhesive becomes too weak, and the packaging substrate 10 may be unintentionally peeled off. If the width BP exceeds 20 mm, the adhesiveness of the hot-melt adhesive becomes too strong, making it difficult to peel off the packaging substrate 10 . Further, when the shape of the adhesive portion 12 is a bead shape, the material of the hot melt adhesive used for forming the adhesive portion 12 is not particularly limited, and may be ethylene vinyl acetate, rubber, polyamide, olefin, or polyurethane. A known one such as a system can be used. Among them, rubber-based or olefin-based materials are preferable, and olefin-based materials are more preferable.

Moreover, the package 1 may be provided with perforations (not shown) for ripping the packaging base material 10 to make it easier to open. For example, the perforations may be provided parallel to the axial direction L (the height direction h of the package 1) in a portion of the packaging base 10 that does not contact the toilet roll 11, or may be provided in the package 1 other than the portion. You may provide in parallel to the axial direction L in a side part (not shown). In addition, perforations may be provided perpendicular to the axial direction L. For example, the toilet rolls 11 may be arranged perpendicular to the axial direction L in two or three rows on the top surface or bottom surface of the package 1. It may be provided in a direction connecting the centers of the respective axes of the toilet roll 11 (not shown). Further, perforations may be provided on the side surface of the package 1 in a direction perpendicular to the axial direction L and along the circumferential direction P of the packaging base material 10 (not shown). Note that the perforation length can be freely set.

2. Packaging Substrate The packaging substrate 10 includes at least a paper substrate, but may include other layers. For example, PE laminated paper may be used from the viewpoint of waterproofing. Further, the paper base material may be printed on the outer surface side when the package 1 is formed. In addition, in the packaging base material 10, it is preferable that the paper base material is the main component, and it is more preferable that the paper base material is 100%, except for the portion adhered with the hot-melt adhesive.

The basis weight of the packaging substrate 10 is 40 g/m ² or more and 105 g/m ² or less, preferably 50 g/m ² or more and 90 g/m ² or less, and 60 g/m ² or more and 80 g/m ² or less. is more preferable. If the basis weight is less than 40 g/m ² , the adhesive portion 12 tends to leave traces on the toilet roll 11 . If the basis weight exceeds 105 g/m ² , the packaging base material 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging. When the basis weight of the packaging base material 10 is within the above numerical range, the shape after packaging is good, the toilet roll 11 is less likely to be defective, and the packaging base material 10 is appropriately adhered and easily peeled off. You can get 1 body.
The basis weight of the packaging base material 10 can be measured according to JIS P 8124, but the measurement excludes the adhesive portion 12 coated with the hot-melt adhesive.

(1) Paper base The paper base is manufactured using wood pulp as the main raw material. Pulp used here includes softwood kraft pulp, hardwood kraft pulp, groundwood pulp, thermomechanical pulp, chemithermomechanical pulp, newspaper, leaflets, printing magazines, coated magazines, thermal recording paper, pressure-sensitive recording paper, and imitation paper. Conventionally known pulp such as waste paper pulp such as paper, colored wood free paper, copy paper, computer output paper, or mixed waste paper of these can be used alone or mixed at an arbitrary mixing ratio. . Among them, kraft paper is preferable.

The pulp used in the paper base material of the package 1 of the present invention is preferably 30% by weight or more and 100% by weight or less of softwood kraft pulp, preferably 0% by weight or more and 70% by weight or less of hardwood kraft pulp, and 50% by weight of softwood kraft pulp. % to 100% by weight, more preferably 0% to 50% by weight of hardwood kraft pulp, 70% to 100% by weight of softwood kraft pulp, and 0% to 30% by weight of hardwood kraft pulp. It is even more preferable to have By blending the pulp as described above, it is possible to obtain a package 1 which has a good shape after packaging, is less likely to produce defective toilet rolls 11, and has a packaging substrate 10 which is appropriately adhered and can be easily peeled off. Moreover, it is preferable that it is an unbleached pulp.

Materials other than pulp fibers may be added to the pulp slurry as auxiliary materials. In the package 1, the pulp fiber content is generally preferably 70% by weight or more and 100% by weight or less, more preferably 80% by weight or more and 100% by weight or less, and 90% by weight or more and 100% by weight or less. It is more preferable to: By setting the pulp content to the above range, it is possible to obtain a package 1 that has a good shape after packaging, is less likely to produce defective toilet rolls 11, and has a packaging base 10 that is appropriately adhered and can be easily peeled off.

The cooking method and bleaching method in pulp production are not particularly limited.

In addition, various commonly used additives such as wet paper strength improvers, fillers, sizing agents, dry paper strength enhancers, yield improvers, color pigments, etc. may be added as appropriate in an appropriate amount.

The wet paper strength improver can be used by selecting from commonly used known agents. For example, it is preferable to select from polyamide/polyamine resins, polyacrylamide resins, melamine resins, and the like. The blending amount (mass in absolute dry state) of such a wet paper strength improving agent is usually 0.01% by weight or more and 0.01% by weight or more of the wet strength improving agent with respect to pulp (mass in absolute dry state). It is preferably 7 wt % or less, preferably 0.02 wt % or more and 0.5 wt % or less, more preferably 0.03 wt % or more and 0.3 wt % or less. Even if the amount of the wet paper strength improver exceeds 0.7% by weight, it becomes difficult to obtain an effect commensurate with the amount, resulting in an increase in cost and a decrease in disaggregation, resulting in the packaging of the present invention. It may be difficult to reuse the body 1 later. In addition, if the amount of the wet paper strength improver is less than 0.01% by weight, it may be difficult to obtain sufficient wet paper strength, and the package 1 may be easily torn when wet, and may be inferior in function as the package 1. .

In the package 1 of the present invention, the paper substrate of the packaging substrate 10 can be obtained by making paper from these raw materials by a normal papermaking process.

(2) Other Layers The packaging base material 10 of the present invention may have other layers in addition to the paper base material. Other layers include, for example, a water vapor barrier layer, an oxygen barrier layer, a print layer, a printability improving layer, an overprint layer, and a light shielding layer. These other layers can be provided, for example, on the surface side or the back side of the paper substrate, and may be one layer or two or more layers.

(3) Physical Properties of Entire Packaging Base As will be described later, there are various packaging formats for the package 1 according to the present invention. In some cases, the toilet roll 11 is wrapped in the width direction (CD direction) orthogonal to the production line direction. When wrapping the toilet roll 11 from the MD direction, the tensile strength of the packaging substrate 10 in the MD direction is preferably 2.5 kN/m or more and 7.5 kN/m or less, and 3.3 kN/m or more and 6.5 kN/m. It is more preferably 4.0 kN/m or more and 5.8 kN/m or less. If the tensile strength in the MD direction is less than 2.5 kN/m, the toilet roll 11 is likely to be marked by the adhesive portion 12 . When the tensile strength in the MD direction exceeds 7.5 kN/m, the packaging substrate 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging.

When wrapping the toilet roll 11 from the CD direction, the tensile strength of the packaging substrate 10 in the CD direction is preferably 1.5 kN/m or more and 5.0 kN/m or less, and 2.0 kN/m or more and 4.2 kN/m. It is more preferably 2.5 kN/m or more and 3.8 kN/m or less. If the tensile strength in the CD direction is less than 1.5 kN/m, the toilet roll 11 is likely to be marked by the adhesive portion 12 . If the tensile strength in the CD direction exceeds 5.0 kN/m, the packaging base material 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging.
By setting the tensile strength in the MD direction and the CD direction of the packaging substrate 10 within the above range, the shape after packaging is good, the toilet roll 11 is less likely to be defective, and the packaging substrate 10 is properly bonded. It is possible to obtain the package 1 which is strong and easy to peel off. The tensile strength of the packaging base material 10 can be measured according to JIS P 8113, but the measurement is performed excluding the adhesive portion 12 coated with the hot-melt adhesive.

The burst strength of the packaging substrate 10 is preferably 120 kPa or more and 430 kPa or less, more preferably 150 kPa or more and 370 kPa or less, and even more preferably 200 kPa or more and 310 kPa or less. If the bursting strength is less than 120 kPa, the toilet roll 11 tends to leave traces of the adhesive portion 12 . If the bursting strength exceeds 430 kPa, the packaging base material 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging. By setting the bursting strength of the packaging base material 10 within the above range, the packaging body has a good shape after packaging, less defective toilet rolls 11 are produced, and the packaging base material 10 is appropriately adhered and easily peeled off. 1 can be obtained.
The bursting strength of the packaging base material 10 can be measured in accordance with JIS P 8112, but the measurement excludes the adhesive portion 12 coated with the hot-melt adhesive.

When wrapping the toilet roll 11 from the MD direction, the bending stiffness of the packaging substrate 10 in the MD direction is preferably 60 μN-m or more and 900 μN-m or less, more preferably 100 μN-m or more and 700 μN-m or less. , 200 μN·m or more and 550 μN·m or less. When the bending stiffness in the MD direction is less than 60 μN·m, the toilet roll 11 is likely to be marked by the adhesive portion 12 . If the bending stiffness in the MD direction exceeds 900 μN·m, the packaging base material 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging.

When the toilet roll 11 is wrapped from the CD direction, the bending stiffness of the packaging base material 10 in the CD direction is preferably 30 μN m or more and 400 μN m or less, more preferably 40 μN m or more and 300 μN m or less. , 70 μN·m or more and 240 μN·m or less. If the bending stiffness in the CD direction is less than 30 μN·m, the toilet roll 11 is likely to be marked by the adhesive portion 12 . When the bending stiffness in the CD direction exceeds 400 μN·m, the packaging substrate 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging.
When the bending stiffness of the packaging substrate 10 in the MD direction or the CD direction is within the above range, the shape after packaging is good, the toilet roll 11 is less likely to be defective, and the packaging substrate 10 is properly bonded. It is possible to obtain the package 1 which is easy to peel off. In addition, it becomes easier to achieve the required suppleness and softness of the packaging substrate 10 .
The bending stiffness of the packaging substrate 10 can be measured according to ISO 2493, but the measurement excludes the adhesive portion 12 to which the hot-melt adhesive is applied. Since the bending stiffness is the strongest when the load is applied in the longitudinal direction of the fiber, when the fiber orientation ratio is close to 1.0, the bending stiffness in the MD direction tends to be small and the bending stiffness in the CD direction tends to be large. There is

The thickness of the packaging substrate 10 of the present invention is preferably 50 μm or more and 160 μm or less, more preferably 70 μm or more and 140 μm or less, and even more preferably 90 μm or more and 120 μm or less. If the thickness is less than 50 μm, the toilet roll 11 is likely to leave traces of the adhesive portion 12 . If the thickness exceeds 160 μm, the packaging base material 10 is difficult to bend at a predetermined position during packaging, resulting in poor shape after packaging. By setting the thickness of the packaging base material 10 within the above range, the packaging body has a good shape after packaging, the toilet roll 11 is less likely to be defective, and the packaging base material 10 is appropriately adhered and easily peeled off. 1 can be obtained.
The thickness of the packaging substrate 10 can be measured according to JIS P 8118:1998. Note that the pressure condition of the pressurized surface is 100 kPa.

The density of the packaging substrate 10 is preferably 0.50 g/cm ³ or more and 0.85 g/cm ³ or less, more preferably 0.55 g/cm ³ or more and 0.80 g/cm ³ or less. More preferably, it is 0.60 g/cm ³ or more and 0.75 g/cm ³ or less. If the density is less than 0.50 g/cm ³ , the packaging base material 10 becomes too thick, the packaging base material 10 is difficult to bend at a predetermined position, the shape after packaging is poor, and the density exceeds 0.85 g/cm ³ . As a result, the packaging base material 10 becomes too thin, the packaging base material 10 is likely to bend at positions other than the predetermined positions, and the toilet roll 11 is likely to be marked by the adhesive portion 12 .
When the density of the packaging base material 10 is within the above range, the packaging body 1 has a good shape after packaging, the toilet roll 11 is less likely to be defective, and the packaging base material 10 is appropriately adhered and easily peeled off. Obtainable. In addition, the required strength, flexibility and softness of the packaging base material 10 can be easily achieved. The density of the packaging base material 10 can be measured and calculated according to JIS P 8118:1998, but is measured excluding the adhesive portion 12 coated with the hot-melt adhesive.

3. Toilet Roll FIG. 4 is a perspective view showing an example of arrangement of the toilet roll 11 packaged in the package 1 of the present invention. The package 1 of the present invention packages 2, 4 or 6 toilet rolls 11 . If the number of rolls exceeds 6, the package 1 becomes heavy, and the packaging base material 10 tends to tear.

The toilet rolls 11 are arranged in one, two, or three rows in a direction perpendicular to the axial direction L, and in the case of two or three rows, both rows are arranged so that both end faces are aligned. However, the arrangement is preferably any one of FIGS. 4 (a) to (e), more preferably the arrangement of FIG. 4 (c) or (d), and FIG. Arrangement is more preferable. When the rows of rolls (the number of rolls in the horizontal direction) exceed three rows (three rolls), the size of the package 1 increases, and the packaging substrate 10 is less likely to bend at a predetermined position during packaging, resulting in a poor shape after packaging. inferior to When the number of stacked rolls (the number of rolls in the vertical direction) exceeds 3, the size of the package 1 becomes large, the packaging base 10 is difficult to bend at a predetermined position during packaging, and the shape after packaging is poor. Note that the end faces of each row may be shifted by several millimeters due to variations in the roll width of each toilet roll 11 or the like.

Although the number of plies of the toilet roll 11 is not particularly limited, it is preferably one ply or two plies, more preferably two plies.
The roll length of the toilet roll 11 is preferably 35 m or more and 103 m or less, more preferably 40 m or more and 95 m or less, and even more preferably 55 m or more and 85 m or less, in the case of two-ply. In the case of one ply, the length is preferably 80 m or more and 203 m or less, more preferably 100 m or more and 185 m or less, and even more preferably 120 m or more and 173 m or less. If the length is less than 35 m in the case of 2 plies or less than 80 m in the case of 1 ply, the roll density will be low and the shape after packaging will be poor if the roll diameter and length are constant. If it exceeds 103 m in the case of 2 plies or exceeds 203 m in the case of 1 ply, the roll density increases when the winding diameter and winding length are constant, and the toilet roll 11 tends to leave marks of the adhesive part 12. (Because the toilet roll 11 is tightly wound, the marks are less likely to disappear).

The roll diameter of the toilet roll 11 is preferably 105 mm or more and 140 mm or less, more preferably 110 mm or more and 127 mm or less, and even more preferably 115 mm or more and 122 mm or less. If the winding diameter is less than 105 mm, the roll density will be high when the winding length and basis weight are constant, and the toilet roll 11 will easily leave marks of the adhesive portion 12 (because the toilet roll 11 is tightly wound, scars will be less likely to disappear). If it exceeds 140 mm, the roll density will be low and the form after packaging will be poor when the winding length and basis weight are constant.
By setting the roll length and roll diameter of the toilet roll 11 within the above ranges, it becomes easier to adjust the roll density to a predetermined value. Then, when the toilet roll 11 is wrapped with the packaging base material 10, the packaging base material 10 is not easily broken, and is easily bent at a predetermined position during packaging, so that the package 1 having an excellent shape after packaging can be obtained. can.

The outer diameter of the core (paper tube) of the toilet roll 11 is preferably 25 mm or more and 55 mm or less, more preferably 30 mm or more and 50 mm or less, and even more preferably 35 mm or more and 45 mm or less. If the outer diameter of the core is less than 25 mm, the roll density will be low when the winding diameter, winding length and basis weight are constant, resulting in poor shape after packaging. If it exceeds 55 mm, the roll density increases when the roll diameter, roll length, and basis weight are constant, and the toilet roll 11 is likely to be marked by the adhesive portion 12 (because the toilet roll 11 is tightly wound, the mark becomes difficult to disappear).

In addition, the basis weight per ply of the toilet roll 11 is preferably 12 g/m ² or more and 18 g/m ² or less in the case of two plies, and is preferably 13 g/m ² or more and 17 g/m ² or less. More preferably, it is 14 g/m ² or more and 16 g/m ² or less. In the case of one ply, it is preferably 13 g/m ² or more and 22 g/m ² or less, more preferably 14 g/m ² or more and 20 g/m ² or less, and 15 g/m ² or more and 18 g/m ² or less. It is even more preferable to have If it is less than 12 g/m ² in the case of 2 plies or less than 13 g/m ² in the case of 1 ply, the roll density will be low when the roll diameter and roll length are constant, and the shape after packaging will be reduced. inferior to If it exceeds 18 g/m ² in the case of 2 plies or 22 g/m ² in the case of 1 ply, the roll density increases when the roll diameter and roll length are constant, and the adhesion part to the toilet roll 11 increases. The marks 12 are likely to be left (because the toilet roll 11 is tightly wound, the marks are less likely to disappear).

Furthermore, the weight of one roll of the toilet roll 11 excluding the core per roll width of 114 mm is preferably 120 g or more and 370 g or less, more preferably 135 g or more and 330 g or less, and 190 g or more and 305 g or less. is more preferred. If the weight is less than 120 g, the roll density will be low when the roll diameter is constant, and the shape after packaging will be poor. When the weight exceeds 370 g, the roll density increases when the winding diameter is constant, and the toilet roll 11 tends to leave marks of the adhesive part 12 (because the toilet roll 11 is tightly wound, the marks are difficult to disappear. ).
By setting the outer diameter, basis weight, and weight of the core of the toilet roll 11 within the above ranges, it becomes easier to adjust to a predetermined roll density. Then, when the toilet roll 11 is wrapped with the packaging base material 10, the packaging base material 10 is not easily broken, and is easily bent at a predetermined position during packaging, so that the package 1 having an excellent shape after packaging can be obtained. can.

The roll density of the toilet roll 11 is 0.10 g/cm ³ or more and 0.33 g/cm ³ or less, preferably 0.12 g/cm ³ or more and 0.31 g/cm ³ or less, and 0.18 g. /cm ³ or more and 0.27 g/cm ³ or less. If the roll density is less than 0.10 g/cm ³ , the form after packaging is poor. If the roll density exceeds 0.33 g/cm ³ , the toilet roll 11 is likely to be marked by the adhesive portion 12 (because the toilet roll 11 is tightly wound, the marks are difficult to disappear). By setting the roll density of the toilet roll 11 within the above range, the packaging base material 10 is hard to be broken, and it is easy to bend at a predetermined position during packaging, and the packaging body 1 having an excellent shape after packaging is obtained. can be done.

The roll density is obtained by multiplying the base area of one toilet roll 11 excluding the core by the roll width (height) (that is, the volume of one toilet roll 11 excluding the core). It is obtained by dividing the weight of one toilet roll 11 by this volume.
For example, when the roll weight (excluding the core) per roll width of 114 mm is 201 g, the winding diameter is 130 mm, and the core outer diameter is 39 mm, the roll density = 201 g ÷ [{3.14 × (130 mm ÷ 2 ÷ 10) ² - 3.14×(39 mm÷2÷10) ² }×(114 mm÷10)]=0.15 g/cm ³ .
At this time, the measurement of the roll density is carried out after holding in equilibrium under the temperature and humidity conditions (23±1° C., 50±2% RH) specified in JIS P 8111.

The paper thickness of 10 sheets of toilet paper used for the toilet roll 11 (10 sheets for 1 ply, 10 sheets for 5 sets for 2 plies) is 0.4 mm/10 sheets or more and 1.2 mm/10 sheets. It is preferably 0.5 mm/10 sheets or more and 1.1 mm/10 sheets or less, and even more preferably 0.6 mm/10 sheets or more and 0.9 mm/10 sheets or less.
The paper thickness is measured using a thickness gauge (dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa and a probe diameter of 30 mm. Also, the measurement is repeated 10 times and the measurement results are averaged.

4. Packaging Format Caramel packaging is preferable as the packaging format for the package 1 according to the present invention.

Caramel packaging refers to wrapping a packaging material extending along one direction of the object to be packaged in a direction parallel to or intersecting with this direction, or wrapping the packaging material in a cylindrical shape in advance. Put the item to be packaged from one end of the direction. Then, of the packaging base material protruding from both end sides of the object to be packaged, two opposing flap-shaped sides are folded together, then another two opposing flap-shaped sides are similarly folded together, and these folded portions are folded. It is a packaging format in which the product is sealed with an adhesive such as glue. This caramel packaging can be performed using known equipment.

At this time, in the package 1 according to the embodiment shown in FIGS. A first flap portion 131 and a second flap portion 132 are formed by folding the two flap-shaped sides that face each other in the circumferential direction P of the packaging base material 10 . Next, a hot-melt adhesive is applied to the folded portion to form the first adhesive portion 121, the first flap portion 131 is folded thereon, and the first flap portion 131 is adhered. Finally, a hot melt adhesive is applied to the inner side (back side) of the second flap portion 132 to form the second adhesive portion 122 (or a hot melt adhesive is applied to the first flap portion 131 to form the second adhesive portion 122). The second flap portion 122 is formed), the second flap portion 132 is folded thereon, and the first flap portion 132 is adhered. By bonding the flap part 13 with the bonding part 12 in this way, the packaging body 1 has a good shape after packaging, hardly produces defective toilet rolls 11, and the packaging base material 10 is appropriately bonded and easily peeled off. can be obtained.
The bonding process is the same for the package 1 according to another embodiment shown in FIG. 3 as well, except that the shape of the bonding portion 12 is different.

In one embodiment, for example, when using the packaging base material 10 having a bending stiffness in the MD direction of 60 μN m or more and 900 μN m or less, the package body 1 of the present invention, for example, includes the packaging base material 10 in the form of a continuous sheet. After arranging the toilet roll 11, it is wrapped while wrapping the toilet roll 11 from the transport direction (manufacturing line direction; MD direction), and cut to a predetermined size from the width direction (CD direction) orthogonal to the transport direction. In other words, when the wrapping direction (peripheral direction P of the packaging base material 10) is the MD direction of the packaging base material 10, it is particularly preferably applied. When the wrapping direction is set to the MD direction of the packaging base 10, the packaging base 10 can be easily bent appropriately in the width direction (CD direction), and packaging is facilitated when the flaps are folded and adhered to the top surface and bottom surface. . In this case, in the package 1 of the present invention, it is preferable to select caramel packaging as the packaging format. The toilet roll 11 may be placed after the packaging base material 10 is cut into a predetermined size, or the packaging base material 10 may be cut into a predetermined size after the toilet roll 11 is placed.

In another embodiment, for example, when using the packaging base material 10 having a bending stiffness in the CD direction of 30 μN m or more and 400 μN m or less, the package body 1 of the present invention, for example, uses the packaging base material 10 as a continuous sheet. After conveying in the form and arranging the toilet roll 11, when packaging while wrapping the toilet roll 11 from the width direction (CD direction) orthogonal to the conveying direction (manufacturing line direction; MD direction), that is, the wrapping direction (packaging base It is particularly preferably applied when the circumferential direction P) of the material 10 is the CD direction of the packaging base material 10 . When the wrapping direction is the CD direction of the packaging base 10, the packaging base 10 can be easily bent in the wrapping direction (CD direction), making packaging easier. Also in this case, the toilet roll 11 may be placed after the packaging base material 10 is cut to a predetermined size, or the packaging base material 10 may be cut to a predetermined size after the toilet roll 11 is placed. good.

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

Hereinafter, the present invention will be described in detail with reference to examples. It should be noted that the present invention is by no means limited to the examples shown below.

In Examples and Comparative Examples, the physical properties of the prepared packaging substrates were measured by the following methods.

(Basis weight of packaging base material)
The basis weight of the packaging substrate was measured according to JIS P 8124.

(Thickness of packaging base material)
The thickness of the packaging base material was measured according to JIS P 8118:1998 using an automatic lifting type paper thickness gauge Standard Model TM-600 (manufactured by Kumagai Riki Kogyo Co., Ltd.). The pressure condition of the pressurized surface was set to 100 kPa.

(Density of packaging base material)
The density of the packaging substrate was measured and calculated according to JIS P 8118:1998.

(Tensile strength in MD direction and CD direction of packaging substrate)
The tensile strength in the MD and CD directions of the packaging substrate was measured according to JIS P 8113.

(Measurement of bending stiffness in MD direction and CD direction of packaging substrate)
The bending stiffness in the MD and CD directions of the packaging substrate was measured using an L&W bending tester (manufactured by Lorentzen & Wettre) in accordance with the method described in ISO 2493. The packaging substrate is a test piece with a width of 38 mm and a length of 100 mm. Bending stiffness (μN·m) was determined by
Bending stiffness (μN m) = 60 x bending resistance (mN) x bending length 10 (mm) ² ÷ (π x bending angle 15 (°) x sample width 38 (mm))
If a test piece with a length of 100 mm cannot be obtained, the length of the test piece can be shortened. Also, the test piece should not contain perforations, but may contain perforations when the perforations must be included in order to ensure the size of the test piece.

(Burst strength of packaging base material)
The bursting strength of the packaging substrate was measured according to JIS P 8112. The measurement was performed using a Mullen burst tester manufactured by Kumagai Riki Kogyo Co., Ltd. under the measurement conditions for low pressure.

<Example 1>
(packaging base material)
A paper substrate (kraft paper) was prepared using 100% by weight of unbleached softwood kraft pulp (NUKP) as a pulp raw material, and this was used as a packaging substrate as it was. Table 1 shows the results of measuring the basis weight, thickness, density, tensile strength in the MD and CD directions, bursting strength, and bending stiffness in the MD and CD directions of the packaging substrate.

(toilet roll)
Four toilet rolls having the roll length, roll diameter, number of plies, core outer diameter, basis weight per ply, weight per roll width of 114 mm, and roll density shown in Table 1 were prepared.

(Toilet roll packaging (caramel packaging))
Using the produced packaging base material, a package was produced from 650 mm in the MD direction of the packaging base material and 420 mm in the CD direction of the packaging base material. Then, 4 toilet rolls (2 in length × 2 in width) are placed in this package, a rubber-based hot-melt adhesive is applied to form a spiral-shaped adhesive portion, and then caramel-wrapped. It was sealed to obtain a toilet roll package. In addition, it was set as the format which wraps and wraps a toilet roll from MD direction. Also, the width of the adhesive portion was 18 mm.

(Form after packaging (beauty))
Thirty monitors evaluated the goodness of the shape (cosmetic property) of the produced toilet roll package when the appearance of the package was visually observed. Evaluation criteria are as follows.
5: 0 to 1 person felt that the packaging base material was loose or not bent at a predetermined position, and the cosmetic appearance was inferior, and the cosmetic appearance was remarkably good.
4: 2 or 3 people felt that the packaging base material was loose or not bent at a predetermined position, and the cosmetic appearance was poor, indicating that the cosmetic appearance was good.
3: 4 to 5 people felt that the packaging base material was loose or not bent at a predetermined position, and the cosmetic appearance was generally good.
2: 6 to 7 people felt that the packaging base material was loose or not bent at a predetermined position, and that the appearance was inferior, and there was no problem with the appearance.
1: 8 to 30 people felt that the packaging base material was loose or not bent at a predetermined position, and the cosmetic appearance was poor.

(Difficulty in leaving marks on the adhesive part)
The prepared toilet roll package was evaluated by 30 monitors as to how difficult it was for the adhesive part to leave a mark when the adhesive part was pressed against a toilet roll of another package. Evaluation criteria are as follows.
5: 0 to 1 person felt that the toilet roll was easily marked by the adhesive portion, and the resistance to marks was remarkably good.
4: 2 to 3 people felt that the toilet roll was easily marked by the adhesive portion, and the resistance to marks was good.
3: 4 to 5 people felt that the toilet roll was likely to leave a mark at the adhesive portion, and the resistance to leaving a mark was generally good.
2: 6 to 7 people felt that the toilet roll easily left marks at the adhesive portion, and there was no problem with the difficulty of leaving marks.
1: 8 to 30 people felt that the toilet roll was easily marked by the adhesive portion, indicating poor resistance to marks.

(Appropriate adhesiveness of the adhesive part)
Thirty monitors evaluated the adhesiveness of the adhesive portion when the packaging substrate was peeled off from the adhesive portion of the prepared toilet roll package. Evaluation criteria are as follows.
5: 0 to 1 person felt that the adhesive part was too weak to be easily peeled off or that the adhesive part was too strong to be easily peeled off, and the adhesiveness was remarkably good.
4: Two or three people felt that the adhesive part was too weak to be easily peeled off, or that the adhesive part was too strong to be easily peeled off, indicating that the adhesiveness was good.
3: 4 to 5 people felt that the adhesive part was too weak to be easily peeled off, or that the adhesive part was too strong to be easily peeled off, and the adhesiveness was generally good.
2: 6 to 7 people felt that the adhesive part was too weak to be easily peeled off or that the adhesive part was too strong to be easily peeled off, and there was no problem with adhesiveness.
1: 8 to 30 people felt that the adhesive part was too weak to be easily peeled off or the adhesive part was too strong to be easily peeled off, indicating poor adhesiveness.

<Example 2> to <Example 58>, <Comparative Example 1> to <Comparative Example 4>
In Examples 2 to 58 and Comparative Examples 1 to 4, packaging substrates having physical properties shown in Tables 1 to 4 were prepared in the same manner as in Example 1, and using this, a toilet roll was prepared in the same manner as in Example 1. A package (caramel package) was produced, and the shape after packaging, the difficulty of leaving marks on the adhesive portion, and the appropriate adhesiveness of the adhesive portion were evaluated.
The results are shown in Tables 1-4.

As is clear from the results shown in Tables 1 to 4, the packages of Examples 1 to 58 are all excellent in shape after packaging, the adhesive part is less likely to leave marks, and the adhesive part is moderately adhered and easy to peel off. Met. On the other hand, in Comparative Examples 1 to 4, the shape after packaging was poor, the adhesive part was easily left behind, or the adhesive part was difficult to peel off.
Therefore, in the package of the present invention, even if a toilet roll is packaged with a packaging base material containing at least a paper base material and adhered with a hot-melt adhesive, the shape after packaging is good, and defective toilet roll products are produced. It is possible to provide a toilet roll package that is difficult to peel off, has a packaging base material that is appropriately adhered, and is easy to peel off.

1 package 10 packaging substrate 11 toilet roll 12, 121, 122 adhesive part 13, 131, 132 flap part h height direction of package L axial direction of toilet roll P circumferential direction of packaging substrate BP, SP adhesive part width of

Claims (10)

A package in which 2, 4 or 6 toilet rolls are packaged with a packaging base material containing at least a paper base material,
The basis weight of the packaging substrate is 40 g/m ² or more and 105 g/m ² or less,
When the toilet rolls are arranged in one, two, or three rows in a direction perpendicular to the axial direction, and two or three rows, both rows are arranged so that both end faces are aligned,
At least one of the top surface portion and the bottom surface portion of the package is provided with an adhesive portion for bonding by applying a hot melt adhesive to the flap portion in which the end portion of the packaging base material is folded. . 2. The toilet roll package according to claim 1, wherein the adhesive part has a spiral shape. 3. The toilet roll package according to claim 2, wherein the width of said adhesive part is 3 mm or more and 40 mm or less. The toilet roll package according to claim 2 or 3, wherein the material of said hot-melt adhesive is rubber. 2. The toilet roll package according to claim 1, wherein the adhesive part has a bead shape. 6. The toilet roll package according to claim 5, wherein the width of said adhesive part is 1 mm or more and 20 mm or less. The toilet roll package according to claim 5 or 6, wherein the material of said hot-melt adhesive is olefin. The toilet roll package according to any one of claims 1 to 7, wherein the toilet roll has a roll density of 0.10 g/ ^cm3 or more and 0.33 g/cm3 ^or less. The toilet roll package according to any one of claims 1 to 8, characterized in that the package is a caramel package. 10. The method according to any one of claims 1 to 9, characterized in that when the package is packed in a cardboard box, the package is arranged and packed so that the axial direction of the toilet roll is perpendicular to the bottom surface of the cardboard box. The toilet roll package according to any one of the items.

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