JP7512939B2 - Sanitary paper roll packaging - Google Patents

Description

The present invention relates to a sanitary paper roll packaging body that is made by packaging a sanitary paper roll.

Conventionally, sanitary paper rolls, such as toilet paper or kitchen paper, are generally packaged in sets of several pieces in plastic film to maintain hygiene and prevent dust and dirt from adhering to the rolls. For example, Patent Document 1 describes a package in which sanitary paper rolls are packaged in two rows in plastic film, and the position of the opening line formed on the packaging bag is designed so that the opening line does not break when the gripping margin between the sanitary paper rolls that is created when packaged in two rows is gripped.

JP 2018-90255 A Japanese Patent Application Laid-Open No. 01-226512

However, in recent years, the problem of plastic waste has become more serious worldwide, and there is a demand to replace plastic packaging materials with other materials in order to improve the global environment. The packaging bag described in Patent Document 1 is also made of plastic, and there is still room for improvement in the selection of materials for packaging bags that package multiple sanitary paper rolls.

When wrapping sanitary paper rolls, the ends of the packaging material are glued together at the glued area using adhesive or other materials, but the position and width of this glued area must be designed with consideration given to preventing the packaging material from tearing when pressed down during gluing.

The object of the present invention is to provide a sanitary paper roll package that is environmentally friendly and can prevent the packaging bag from tearing due to the pressure applied during bonding.

The sanitary paper roll packaging according to the present invention is a sanitary paper roll packaging in which a plurality of sanitary paper rolls are wrapped around the body and wrapped with paper material, and the plurality of sanitary paper rolls are arranged side by side so that both end faces are aligned in a direction perpendicular to the axial direction, and when the sanitary paper roll packaging is viewed from above, the point closest to the glue margin of the packaging portion among the intersections of a common inscribed line drawn for the plurality of sanitary paper rolls and the packaging portion of the sanitary paper roll packaging is designated as point CP, and the glued end located farther from point CP among both adhesive ends of the adhesive portion of the glue margin is designated as point A, the length between point CP and point A in the roll parallel direction in which the sanitary paper rolls are arranged side by side so as to straddle the common inscribed line passing through point CP is 40% to 90% of the value obtained by dividing the length of the sanitary paper roll packaging in the roll parallel direction by the number of rows of the sanitary paper rolls in the roll parallel direction.

By using paper as the material for the packaging bag that wraps multiple sanitary paper rolls, an environmentally friendly sanitary paper roll package can be realized, and by positioning the packaging bag so that it is in contact with or close to the sanitary paper roll, it is possible to prevent the packaging bag from tearing due to the pressure applied when it is glued.

The sanitary paper roll packaging according to the present invention is also characterized in that, when the sanitary paper roll packaging is viewed from above, the length of the adhesive portion in the parallel direction of the rolls is 10% to 60% of the value divided by the number of rows.

In the packaging bag of the sanitary paper roll packaging body according to the present invention, by setting the length of the adhesive portion of the glue tab in the parallel direction of the roll within the above-mentioned numerical range, a sufficient adhesive effect can be obtained, and the area to which the sealant is applied can be optimized, making it possible to reduce costs.

Furthermore, the sanitary paper roll packaging according to the present invention is characterized in that the sanitary paper roll is one ply, the winding length of the sanitary paper roll is 50 m or more and 150 m or less, and the winding density of the sanitary paper roll is 0.65 m/ ^cm2 or more and 1.30 m/ ^cm2 or less.

By setting the winding length of the one-ply sanitary paper roll according to the present invention within this numerical range, the frequency of roll replacement is reduced, and the weight becomes appropriate when the packaging bag of the package is picked up from both sides with one hand and carried, reducing the possibility of the packaging bag of the package tearing. Furthermore, by setting the winding density of the one-ply sanitary paper roll according to the present invention within this numerical range, the sanitary paper roll is less likely to be crushed by the pressure applied when bonding in the packaging process, and the sanitary paper roll is more easily able to adapt to deformation, so that when the packaging bag of the package is picked up with one hand and carried, finger pressure is dispersed and is less likely to be concentrated on one point on the packaging bag, making the packaging paper less likely to tear.

In addition, the sanitary paper roll packaging of the present invention is characterized in that the sanitary paper roll is two-ply, the winding length of the sanitary paper roll is 25 m or more and 75 m or less, and the winding density of the sanitary paper roll is 0.65 m/cm2 ^or more and 1.30 m/ ^cm2 or less.

By setting the winding length of the two-ply sanitary paper roll according to the present invention within this numerical range, the frequency of roll replacement is reduced, and the weight becomes appropriate when the packaging bag of the package is picked up from both sides with one hand and carried, reducing the possibility of the packaging bag of the package tearing. Furthermore, by setting the winding density of the two-ply sanitary paper roll according to the present invention within this numerical range, the sanitary paper roll is less likely to be crushed by the pressure applied when bonding in the packaging process, and the sanitary paper roll is more easily able to adapt to deformation, so that when the packaging bag of the package is picked up with one hand and carried, finger pressure is dispersed and is less likely to be concentrated at one point on the packaging bag, making it less likely to tear.

The sanitary paper roll packaging according to the present invention is characterized in that the basis weight of the paper material of the sanitary paper roll packaging is 40.0 g/ ^m2 or more and 80.0 g/ ^m2 or less, and the density of the paper material is 0.60 g/ ^cm3 or more and 0.90 g/ ^cm3 or less.

By setting the basis weight of the paper material of the sanitary paper roll packaging body of the present invention within this numerical range, the packaging bag of the packaging body is less likely to tear when picked up and carried with one hand, and manufacturing costs can be reduced. Furthermore, by setting the density of the paper material of the sanitary paper roll packaging body of the present invention within this numerical range, the bulk and interfiber bonding are optimized, so the packaging bag of the packaging body is less likely to tear when picked up and carried with one hand, and the rigidity is optimized, resulting in excellent packaging processability.

According to the present invention, by using paper as the material for the packaging bag that wraps multiple sanitary paper rolls, an environmentally friendly sanitary paper roll package is realized, and by positioning the adhesive of the packaging bag in contact with or close to the sanitary paper roll, it is possible to prevent the packaging bag from breaking due to the force of being pressed during adhesive application.

FIG. 1 is an overall perspective view of a sanitary paper roll packaging body according to one embodiment of the present invention. FIG. 2 is a plan view of the sanitary paper roll packaging body according to one embodiment of the present invention, viewed from above in a packaging bag. FIG. 2 is a plan view of a packaging bag for a sanitary paper roll packaging according to one embodiment of the present invention, with the adhesive between the top and bottom of the sanitary paper roll packaging removed and the adhesive between the glue tabs removed and the bag unfolded.

The configuration of the sanitary paper roll packaging body according to the present invention will be described in detail with reference to Figures 1 to 3. However, the present invention is not limited to this configuration.

As described above, the sanitary paper roll according to the present invention is a roll of sanitary paper such as toilet paper or kitchen paper, and the form of the sanitary paper roll package described below is a form in which the toilet roll is packaged in a paper packaging bag (hereinafter also referred to as "wrapping paper").

In this specification, claims, and drawings, the "height direction," "width direction," and "length direction" are all perpendicular to each other.

In addition, in this specification, claims, and drawings, the "roll parallel direction" corresponds to either the "width direction" or the "length direction" described above.

<Configuration>
Fig. 1 is an overall perspective view of a sanitary paper roll packaging 1 according to one embodiment of the present invention, Fig. 2 is a plan view of the sanitary paper roll packaging 1 according to this embodiment viewed from above in the direction of the roll axis 2A of the sanitary paper roll 2 of the packaging bag 10, and Fig. 3 is a plan view of the packaging bag 10 of the sanitary paper roll packaging 1 according to this embodiment, with the adhesive at the top and bottom of the sanitary paper roll packaging 1 peeled off and the adhesive at the glue tab 11 peeled off. The unfolded packaging paper in Fig. 3 is designated 10B.

The sanitary paper roll packaging 1 according to the present invention is a package in which a plurality of sanitary paper rolls 2 are arranged in parallel so that both end faces are aligned in a direction perpendicular to the axial direction, and wrapped around the body with paper material (paper materials). As shown in FIG. 1, the sanitary paper roll packaging 1 according to this embodiment is a package in which four toilet rolls 2 in two rows and two columns are wrapped in paper material. Examples of the paper material include coated paper, craft paper, and laminated paper. The paper material is obtained by papermaking a slurry containing a pulp component, which is a fiber raw material. Examples of the pulp component include wood pulp, non-wood pulp, and recycled paper pulp. The total number of sanitary paper rolls 2 contained in the sanitary paper roll packaging 1 is preferably an even number, 8 rolls or less, and more preferably 4 rolls. The caramel packaging may be a known one, and may be, for example, a packaging means described in Patent Document 2. Specifically, for example, the sanitary paper roll 2 placed on a flat paper material is first wrapped in a rolling manner, and the overlapping portions in the rolling direction are glued. This bonding is performed, for example, by heat sealing. Next, the excess portion that extends beyond the end face position of the sanitary paper roll 2 is folded toward the end face side of the sanitary paper roll 2 (by folding along the fold line indicated by the symbol FL in FIG. 3). Then, the leading edges of the triangular or trapezoidal pieces formed during folding are glued together to cover the sanitary paper roll 2 from the top and bottom end faces. A known device can be used to perform this type of caramel packaging.

The paper material in the sanitary paper roll packaging 1 can be bonded by a heat sealing method or a pressure-sensitive method. The heat sealing method is particularly preferred. For bonding by this method, a sealant is applied to the paper material (the glue margin 11 and one or both sides of the folded portion) in advance. The sealant is selected appropriately depending on the bonding method used. In the heat sealing method, a heat sealant that exerts its adhesive function when heat is applied is used. In the pressure-sensitive method, a pressure-sensitive sealant that exerts its adhesive function when pressure is applied is used.

The sanitary paper roll 2 according to the present invention is composed of one ply (or two plies) of paper portion 20 and a paper tube (core) 21. The winding diameter of the sanitary paper roll 2 is preferably 100 mm or more and 130 mm or less, more preferably 105 mm or more and 125 mm or less. The core outer diameter dc of the paper tube 21 is preferably 37 mm or more and 42 mm or less, more preferably 38 mm or more and 41 mm or less. Here, the number of plies refers to the number of layers of the sanitary paper roll.

When the sanitary paper roll packaging 1 according to the present invention is viewed from above, the point closest to the glue margin 11 of the packaging portion 10 among the intersections of the common inscribing line CIL drawn for the multiple sanitary paper rolls 2 and the packaging portion 10 (the outermost surface of the packaging portion 10) of the sanitary paper roll packaging 1 is defined as point CP, and the glued end of the glued portion 11a of the glue margin 11 (the portion shown with diagonal hatching in the figure) that is the furthest from point CP is defined as point A. The length Lca between point CP and point A in the roll parallel direction in which the sanitary paper rolls 2 are aligned so as to straddle the common inscribing line CIL that passes through point CP is 40% to 90% of the value Lr obtained by dividing the length L of the sanitary paper roll packaging 1 in the roll parallel direction (hereinafter also referred to as the "packaging width") by the number of rows of the sanitary paper rolls in the roll parallel direction.

In this embodiment, by using paper as the material for the packaging bag 10 that packages multiple sanitary paper rolls 2, an environmentally friendly sanitary paper roll packaging body 1 is realized, and by positioning the adhesive of the packaging bag 10 in contact with or close to the sanitary paper roll 2, it is possible to prevent the packaging bag 10 from breaking due to the effect of being pressed during adhesive application. If the length Lca is below or above the above range, it will be significantly separated from the surface that is in contact with the sanitary paper roll 2, and will not be sufficiently pressed during adhesive application, resulting in poor adhesiveness. The above range of the length Lca with respect to the value Lr is preferably 50% or more and 85% or less, and more preferably 60% or more and 80% or less.

As a further specific example of this embodiment, when the sanitary paper roll packaging 1 is viewed from above, the length Ls (hereinafter also referred to as the "adhesive width") of the adhesive portion 11a in the parallel direction of the roll may be 10% to 60% of the value Lr. The above range of the length Ls relative to the value Lr is preferably 20% to 50%, and more preferably 25% to 45%.

In this embodiment, by setting the length of the adhesive portion 11a of the adhesive margin 11 in the roll parallel direction in the packaging bag 10 of the sanitary paper roll packaging body 1 to the specified numerical range, a sufficient adhesive effect can be obtained, and the area to which the sealant is applied can be optimized, making it possible to reduce costs. On the other hand, if the numerical range is less than 10%, a sufficient adhesive effect cannot be obtained, and if it exceeds 60%, the area to which the sealant is applied will be wider, leading to increased costs.

In the present invention, it is preferable to glue the adhesive portion 11a of the adhesive margin 11 with the shorter end of the wrapping paper 10 facing downward (inner side). In other words, when multiple sanitary paper rolls 2 are wound around the body in the counterclockwise direction, if viewed from above and the starting point is, for example, at the lower right, the adhesive will go around the starting point once to cover it.

In addition, in the present invention, it is preferable that the winding density of the sanitary paper roll 2 is high (it is even more preferable that it is within the range described below). This configuration makes it difficult for the sanitary paper roll 2 to be crushed, and it is possible to increase the pressure applied during adhesion, thereby improving adhesion.

As a further specific example of this embodiment, the basis weight of the paper material of the packaging bag 10 of the sanitary paper roll packaging body 1 may be 40.0 g/ ^m2 or more and 80.0 g/ ^m2 or less, and the density of the paper material may be 0.60 g/ ^cm3 or more and 0.90 g/ ^cm3 or less. The basis weight is preferably 42.5 g/ ^m2 or more and 70.0 g/ ^m2 or less, and more preferably 45.0 g/ ^m2 or more and 60.0 g/ ^m2 or less. The density is preferably 0.65 g/ ^cm3 or more and 0.85 g/ ^cm3 or less, and more preferably 0.70 g/ ^cm3 or more and 0.80 g/ ^cm3 or less.

This embodiment makes it difficult for the packaging bag 10 of the sanitary paper roll packaging body 1 to tear when it is picked up and carried with one hand, and can reduce manufacturing costs. This embodiment optimizes the bulk and interfiber bonding, so that the packaging bag 10 of the sanitary paper roll packaging body 1 is difficult to tear when it is picked up and carried with one hand, and also optimizes the rigidity, so that packaging processability is excellent. On the other hand, if the basis weight is less than 40.0 g/ ^m2 , the sanitary paper roll packaging body is easily torn when it is picked up with one hand, and if it is higher than 80.0 g/ ^m2 , costs will increase. If the density is less than 0.60 g/ ^cm3 , the bulk is high and the interfiber bonding is low, so that the sanitary paper roll packaging body is easily torn when it is picked up with one hand, and if it is higher than 0.90 g/ ^cm3 , the rigidity is high, so that packaging processability is poor.

As further specific examples of this embodiment, the winding length and winding density for a first specific example in which the number of plies in the sanitary paper roll 2 is one ply and a second specific example in which the number of plies is two plies are described below.

As a first specific example in which the sanitary paper roll 2 is one ply (single ply), the winding length of the sanitary paper roll 2 may be 50 m or more and 150 m or less, and the winding density of the sanitary paper roll 2 may be 0.65 m/ ^cm2 or more and 1.30 m/ ^cm2 or less. The winding length is preferably 60 m or more and 140 m or less, and more preferably 70 m or more and 130 m or less. The winding density is preferably 0.80 m/ ^cm2 or more and 1.25 m/ ^cm2 or less, and more preferably 1.00 m/ ^cm2 or more and 1.20 m/ ^cm2 or less.

The winding density is calculated by multiplying the winding length by the number of plies and dividing the result by the roll cross-sectional area excluding the cross-sectional area of the paper tube, using the following formula.
Winding density (m/cm ² ) = winding length (m) × number of plies / roll cross-sectional area (cm ² )
Here, the cross-sectional area of the roll is expressed as S=πr ² -πrc ² , where r (mm) is the radius of the sanitary paper roll 2 and rc (mm) is the radius of the paper core.

This embodiment reduces the frequency of replacing the sanitary paper roll 2, and the packaging bag 10 of the sanitary paper roll packaging body 1 has an appropriate weight when it is picked up from both sides with one hand and carried, so the possibility of the packaging bag 10 of the sanitary paper roll packaging body 1 being torn is reduced. This embodiment makes the sanitary paper roll 2 less likely to be crushed by the pressure during bonding in the packaging process, and the sanitary paper roll 2 is more likely to adapt to deformation, so that when the packaging bag 10 of the sanitary paper roll packaging body 1 is picked up and carried with one hand, finger pressure is dispersed and is less likely to be concentrated at one point on the packaging bag 10, and the packaging bag 10 is less likely to be torn. On the other hand, if the winding length is less than 50 m, the sanitary paper roll is replaced more frequently. If the winding length exceeds 150 m, the mass of the sanitary paper roll increases and the sanitary paper roll packaging becomes heavy, so that the packaging bag is more likely to be torn when the sanitary paper roll packaging body is picked up from both sides with one hand. If the winding density of the sanitary paper roll is less than 0.65 m/ ^cm2 , the sanitary paper roll will be easily crushed by the pressure applied when bonding in the packaging process, and if the winding density is more than 1.30 m/ ^cm2 , the sanitary paper roll will be difficult to deform, and when the sanitary paper roll package is picked up with one hand, finger pressure will be concentrated on one point on the packaging bag, making the packaging bag more likely to tear.

As a second specific example in which the sanitary paper roll 2 has two plies, the winding length of the sanitary paper roll 2 may be 25 m or more and 75 m or less, and the winding density of the sanitary paper roll 2 may be 0.65 m/ ^cm2 or more and 1.30 m/ ^cm2 or less. The winding length is preferably 30 m or more and 70 m or less, and more preferably 35 m or more and 65 m or less. The winding density is preferably 0.80 m/ ^cm2 or more and 1.25 m/ ^cm2 or less, and more preferably 1.00 m/ ^cm2 or more and 1.20 m/ ^cm2 or less.

This embodiment reduces the frequency of replacement of the sanitary paper roll 2, and because the weight of the packaging bag 10 of the sanitary paper roll packaging 1 becomes appropriate when the packaging bag 10 is picked up from both sides with one hand and carried, the possibility of tearing the packaging bag 10 of the sanitary paper roll packaging 1 is reduced. This embodiment makes the sanitary paper roll 2 less likely to be crushed by the pressure during bonding in the packaging process, and the sanitary paper roll 2 is more resistant to deformation, so that when the packaging bag 10 of the sanitary paper roll packaging 1 is picked up from both sides with one hand and carried, finger pressure is dispersed and is less likely to be concentrated at one point on the packaging bag 10, making the packaging bag 10 less likely to tear. On the other hand, if the winding length is less than 25 m, the frequency of replacement of the sanitary paper roll 2 increases, and if the winding length exceeds 75 m, the mass of the sanitary paper roll 2 increases and the sanitary paper roll packaging 1 becomes heavy, so that the packaging bag 10 is more likely to tear when the sanitary paper roll packaging 1 is picked up from both sides with one hand. If the winding density of the sanitary paper roll 2 is less than 0.65 m/ ^cm2 , the sanitary paper roll 2 will be easily crushed by the pressure applied during bonding in the packaging process, and if the winding density is more than 1.30 m/ ^cm2 , the sanitary paper roll 2 will be difficult to deform, and when the sanitary paper roll packaging body 1 is picked up with one hand, finger pressure will be concentrated at one point on the packaging bag 10, making the packaging bag 10 more likely to tear.

Conventionally, sanitary paper rolls, such as toilet paper or kitchen paper, are generally packaged in sets of several pieces in plastic film to maintain hygiene and prevent dust and dirt from adhering to the rolls. For example, Patent Document 1 describes a package in which sanitary paper rolls are packaged in two rows in plastic film, and the position of the opening line formed on the packaging bag is designed so that the opening line does not break when the gripping space between the sanitary paper rolls that is created when packaged in two rows is gripped.

However, in recent years, the problem of plastic waste has become more serious worldwide, and there is a demand to replace plastic packaging materials with other materials in order to improve the global environment. The packaging bag described in Patent Document 1 is also made of plastic, and there is still room for improvement in the selection of materials for packaging bags that package multiple sanitary paper rolls.

When wrapping sanitary paper rolls, the ends of the packaging material are glued together at the glued area using adhesive or other materials, but the position and width of this glued area must be designed with consideration given to preventing the packaging material from tearing when pressed down during gluing.

Furthermore, when changing the packaging material from plastic film to paper, waterproof, moisture-proof, and stain-resistant properties are considered essential for packaging sanitary paper such as kitchen paper and toilet paper. Therefore, if these properties are to be imparted to paper, it will be thicker than the film, and it is expected that the pressure required to seal the sanitary paper roll with the packaging material using adhesives or the like will be higher than with a film. Also, the paper materials used in the sanitary paper roll packaging body of the present invention, such as coated paper, craft paper, and laminated paper, are less elastic than the plastic films conventionally used as packaging materials, so there is a risk that the packaging paper will tear when pressed during adhesion. Also, the side sides of the sanitary paper roll are more easily crushed than the cross-section sides, and are therefore more susceptible to the effects of pressure during adhesion.

According to the present invention, by using paper as the material for the packaging bag 10 that packages multiple sanitary paper rolls 2, an environmentally friendly sanitary paper roll package 1 is realized, and by positioning the adhesive of the packaging bag 10 in contact with or close to the sanitary paper roll 2, it is possible to prevent the packaging bag 10 from breaking due to the pressure applied during adhesive application.

In addition, according to the embodiment of the present invention, by adjusting the adhesive position of the wrapping paper 10 on the side of the sanitary paper roll 2 and the winding density of the sanitary paper roll 2, it is possible to prevent tearing of the wrapping paper 10 in the paper packaging and crushing of the sanitary paper roll 2 in the lateral direction.

<Comparative evaluation of physical properties>
For the one-ply sanitary paper roll packages according to Examples 1 to 23 and the two-ply sanitary paper roll packages according to Examples 24 to 46, which are further specific embodiments of the present invention described above, 24 parameters relating to the physical properties of the packages, wrapping paper, and sanitary paper rolls were evaluated in comparison with the one-ply Comparative Examples 1-3 and the two-ply Comparative Examples 4-6. The comparative evaluations are shown in Tables 1 and 2 below.

The following measurements and evaluations were performed on the sanitary paper roll package, wrapping paper, and sanitary paper roll of the examples and comparative examples. The measurements of the sanitary paper roll package were performed in an environment conforming to Japanese Industrial Standard JIS P8111 (temperature 23±1°C, humidity 50±2% RH) by conditioning the sample in the environment conforming to JIS P8111. The measurements of the wrapping paper and sanitary paper roll were performed in an environment conforming to JIS P8111 after the sanitary paper roll and wrapping paper obtained by opening the sanitary paper roll package were conditioned in an environment conforming to Japanese Industrial Standard JIS P8111 (temperature 23±1°C, humidity 50±2% RH) for 48 hours. For the basis weight, the basis weight per sheet of wrapping paper or sanitary paper was measured in accordance with JIS P8124. For the paper thickness, the paper thickness per sheet of wrapping paper was measured in accordance with ISO534. The density was calculated from the basis weight and paper thickness. The measurements were taken of the wrapping paper of each of the 10 sanitary paper roll packages, and of a total of 10 sanitary paper rolls, one from each of the 10 sanitary paper roll packages, and the measurement results were averaged.

The packaging width (L) was measured with a vernier caliper on the manufactured sanitary paper roll packaging, and the decimal point was rounded off. Ten packaging bodies were measured, and the measurement results were averaged. Lr was calculated by dividing the obtained packaging width (L) by the number of rows in the parallel direction of the sanitary paper roll.

The length (Lca) from point CP to adhesion point A was measured by cutting only the top surface of the wrapping paper while the sanitary paper roll was still packed, and measuring the length from point CP to adhesion point A with a vernier caliper while looking from above at adhesion point A, and rounding off to the nearest whole number. Measurements were taken from the top of five wrappings and from the bottom of five wrappings in the same way, and the measurement results were averaged.

The adhesion position (Lca/Lr) in the sanitary paper roll packaging was calculated for each sanitary paper roll packaging by dividing Lca obtained according to the above measurement method by Lr for five packagings from the top surface and for five packagings from the bottom surface, and the measurement results for 10 packagings were averaged.

For the adhesive width (Ls), only the top surface of the wrapping paper was cut while the sanitary paper roll was still packed. Looking at the adhesive portion from above, the adhesive width (Ls) was measured with a vernier caliper and rounded off to the nearest whole number. Measurements were taken from the top of five wrappings and from the bottom of five wrappings using the same method, and the measurement results were averaged.

The adhesive width (Ls/Lr) of the sanitary paper roll packaging was calculated for each sanitary paper roll packaging by dividing Ls obtained according to the above measurement method by Lr for five packages from the top and five packages from the bottom, and the measurement results for 10 packages were averaged.

Regarding the winding length, the sanitary paper was unwound from the manufactured sanitary paper roll and the length of the sanitary paper wound around the paper tube from the end to the start was measured. The measurement was performed in increments of 0.5 m and decimals were rounded down. The measurement was performed on a total of 10 rolls, one from each of 10 sanitary paper roll packages, and the measurement results were averaged.

Regarding the roll diameter, the outer diameter of the manufactured sanitary paper roll was measured with a vernier caliper and rounded off to the nearest whole number. This measurement was performed on a total of 10 rolls, one from each of 10 sanitary paper roll packages, and the measurement results were averaged.

For the core outer diameter, the outer diameter of the paper tube of the manufactured sanitary paper roll was measured with a vernier caliper and rounded off to the nearest whole number. This measurement was performed on a total of 10 rolls, one from each of 10 sanitary paper roll packages, and the measurement results were averaged.

The winding density was calculated for each sanitary paper roll using the following formula, in which the winding length was multiplied by the number of plies and divided by the cross-sectional area of the roll excluding the cross-sectional area of the paper tube, for a total of 10 rolls taken from each of 10 sanitary paper roll packages, as described above, and the measurement results for the 10 sanitary paper rolls were averaged.
Winding density (m/cm ² ) = winding length (m) × number of plies / roll cross-sectional area (cm ² )

The roll weight was measured using an electronic balance. The measurements were taken of a total of 10 rolls, one from each of 10 sanitary paper roll packages, and the measurement results were averaged.

<Sensory evaluation>
Regarding the resistance of the wrapping paper to tearing during bonding, the presence or absence of tearing was evaluated for 20 wrappings after bonding treatment. The percentage of wrappings that were not torn was shown on a 5-point scale.

A sensory evaluation was conducted by 30 monitors on factors other than the resistance of the wrapping paper to tearing when glued and cost. The results were rated on a 5-point scale, with a higher rating indicating better (5 (excellent) → 1 (poor)). For the evaluation, products that did not tear when glued were used.

<Differences between Examples and Comparative Examples with the Same Number of Rows and Stages>
<1 ply>
In Comparative Example 1, the ratio of length Lca to value Lr is outside the range of that in Example 1-19, being 26.5%, and it can be seen that the adhesive portion of the adhesive margin is located more inward (closer to the above-mentioned center position) than in Example 1-19. Therefore, in Comparative Example 1, it is expected that the wrapping paper is likely to tear during adhesion, and it is considered that no pressure is applied in the adhesion process, and it is understood that the adhesiveness is also poor.

Comparative Example 2 is outside the range of the ratio of length Lca to value Lr in Example 1-19, at 38.5%, and it can be seen that the adhesive portion of the glue margin is located slightly inward (closer to the center position) than in Example 1-19. Therefore, it can be seen that in Comparative Example 2, since the adhesive position does not come into contact with the sanitary paper roll in many areas, the wrapping paper is easily torn, and since no pressure is applied, the adhesiveness is also poor.

Comparative Example 3 is outside the range of the ratio of length Lca to value Lr in Examples 1-19, at 93.2%, and it can be seen that the adhesive portion of the adhesive margin is located further outboard than in Examples 1-19. Therefore, it can be seen that in Comparative Example 3, the adhesiveness is inferior because the pressure applied during adhesion is weaker the further outboard it is.

<2 ply>
In Comparative Example 4, the ratio of length Lca to value Lr is outside the range of Examples 24-42, being 26.4%, and it can be seen that the adhesive portion of the adhesive margin is located more inward (closer to the above-mentioned center position) than in Examples 24-42. Therefore, in Comparative Example 4, it is expected that the wrapping paper will be easily torn during adhesion, and it is thought that no pressure is applied in the adhesion process, and it is understood that the adhesiveness is also poor.

Comparative Example 5 is outside the range of the ratio of length Lca to value Lr in Example 24-42, at 38.4%, and it can be seen that the adhesive portion of the glue allowance is located slightly further inward (closer to the center position) than in Example 24-42. Therefore, it can be seen that in Comparative Example 5, the adhesiveness is inferior because the pressure applied during adhesion is weaker the further outward.

Comparative Example 6 is outside the range of the ratio of length Lca to value Lr in Examples 24-42, at 93.6%, and it can be seen that the adhesive portion of the adhesive margin is located further outboard than in Examples 24-42. Therefore, it can be seen that in Comparative Example 6, the adhesiveness is inferior because the pressure applied during adhesion is weaker the further outboard it is.

1 Sanitary paper roll package 10 Package bag 10B Unfolded package paper FL Fold line 11 Glue margin 11a Bonded portion 2 Sanitary paper roll 20 Paper portion 21 Paper tube 2A Roll axis CIL Common inscribed line L Length of sanitary paper roll package in roll parallel direction Ls Length of bonded portion in roll parallel direction Lca Distance between point CP and point A in roll parallel direction

Claims (5)

A sanitary paper roll packaging body in which a plurality of sanitary paper rolls are wrapped and packaged with a paper material,
The plurality of sanitary paper rolls are arranged in parallel so that both end faces are aligned in a direction perpendicular to the axial direction,
A sanitary paper roll packaging characterized in that, when viewed from above, point CP is the point of intersection between a common inscribing line drawn for the multiple sanitary paper rolls and the packaging portion of the sanitary paper roll packaging that is closest to the glue margin of the packaging portion, and point A is the glued end of both adhesive ends of the adhesive portion of the glue margin that is farther from point CP, the length between point CP and point A in the roll parallel direction in which the sanitary paper rolls are arranged so as to straddle the common inscribing line that passes through point CP is 50 % or more and 85 % or less of the value obtained by dividing the length of the sanitary paper roll packaging in the roll parallel direction by the number of rows of the sanitary paper rolls in the roll parallel direction. The sanitary paper roll packaging according to claim 1, characterized in that, when the sanitary paper roll packaging is viewed from above, the length of the adhesive portion in the parallel direction of the roll is 10% to 60% of the value divided by the number of rows. The sanitary paper roll packaging according to claim 1 or ² , characterized in that the sanitary paper roll is one ply, the winding length of the sanitary paper roll is 50 m or more and 150 m or less, and the winding density of the sanitary paper roll is 0.65 m/ ^cm2 or more and 1.30 m/cm2 or less. The sanitary paper roll packaging according to claim 1 or 2, characterized in that the sanitary paper roll is two-ply, the winding length of the sanitary paper roll is 25 m or more and 75 m or less, and the winding density of the sanitary paper roll is 0.65 m/ ^cm2 or more and 1.30 m/ ^cm2 or less. The sanitary paper roll packaging according to any one of claims 1 to 4, characterized in that the paper material of the sanitary paper roll packaging has a basis weight of 40.0 g/ ^m2 or more and 80.0 g/ ^m2 or less, and a density of the paper material of the sanitary paper roll packaging is 0.60 g/ ^cm3 or more and 0.90 g/ ^cm3 or less.

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