JP6629534B2 - Roll product package - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll product package in which a plurality of roll products of tissue paper such as long roll toilet paper are stored in a packaging bag.

As a packaging bag for toilet paper or the like, there is used a bag in which a gusset (gusset) is symmetrically folded into a tubular film of polyethylene or the like to form a main body, and the upper portion thereof is folded flat to form a grip portion (Patent Document 1). 1). The grip is provided with a finger hole for the purchaser to carry. In addition, a band-shaped gripping part separate from the main body of the above-described packaging bag is used, which straddles the upper surface of the packaging bag and has both ends joined to opposing side surfaces of the main body (Patent Document 2).
On the other hand, in recent years, roll products such as toilet paper, which are wound longer than in the past, increase the effective use amount per roll, and have been compacted for carrying and storing have been sold. .
However, since the long roll product described above has a large weight per roll, a load is applied to the handle portion and the bottom surface of the packaging bag when a consumer carries the package in which the roll product is packaged. Therefore, in order to secure the strength of the main body and the handle portion of the packaging bag, it is conceivable to increase the thickness of the packaging bag. However, when the thickness of the packaging bag is increased to increase the strength, when the roll product is packaged, there is a problem that the force for tightening the roll product increases and the roll is easily crushed, or the film is rough and the touch feeling of the film is deteriorated. . Further, if the roll is wound tightly so that the roll is not easily crushed, there is a problem that the softness when holding the roll is inferior.

  From such a fact, the applicant has defined the winding length, the mass, the winding hardness of the roll product, and the basis weight of the film forming the packaging bag, and the film is hardly broken when being carried, and the roll product is hardly crushed. A roll product package was developed (Patent Document 3).

JP 2004-269010 A JP 2005-153959 A JP-A-2015-101388 (FIG. 2)

The technique described in Patent Literature 3 described above relates to a type in which a packaging bag and a separate band-shaped gripping portion are joined together. When a long roll product is packaged in a gusset type provided with a gripping portion to be provided, a load is applied between the upper side of the packaging bag and the gripping portion, and the end of the roll product at this portion may be crushed.
Accordingly, the present invention provides a roll product package in which a long roll product is stored in a gusset-type packaging bag, and is easy to carry, and when a roll product having appropriate winding hardness is packaged, the roll product is not easily crushed, An object of the present invention is to provide a roll product package that can stably hold a roll product in a bag.

In order to solve the above-mentioned problems, a roll product package according to the present invention is a roll product package in which a plurality of roll products each formed by winding a 2 ply sheet of sanitary thin paper in a packaging bag made of a film are provided. Are stacked in the packaging bag by stacking two or three stages arranged in a row with the axial direction up and down, and the packaging bag is constituted by a tubular gusset bag, and substantially surrounds the roll product. A rectangular parallelepiped main body portion, and a grip portion extending and joined in a gable-roof shape upward from long sides facing each other among upper edges of the main body portion, and a finger hole is provided in the grip portion. The roll length of the roll product is 70 to 85 m, the mass of one roll excluding the core is 239 to 298 g, the roll hardness is 1.2 to 2.5 mm, and the film the amount is 25.5-3 .5 a g / ^{m 2,} the length is the inclination angle θ is 29-40 degrees of the packaging bag from the sides to the grip portion, the long side width W is one hundred eleven to one hundred twenty-two mm between hardness winding (the (Mm / (g / m ² )) is 0.041 to 0.087 (mm / (g / m ² )) .

Before SL is preferably a basis weight per one sheet is beyond 17 g / ^{m 2} or less 13 g / ^{m 2.}

  According to the present invention, in a roll product package in which a long roll product is stored in a gusset-type packaging bag, the roll product is easy to carry, and when the roll product having an appropriate winding hardness is packaged, the roll product is not easily crushed, A roll product package that can stably hold the roll product in the bag is obtained.

It is a perspective view of a roll product package concerning an embodiment of the present invention. It is sectional drawing of the packaging bag before storing a roll product. It is a front view showing a roll product package. It is a figure which shows the force applied to the edge part of the roll product which contacts a long side. It is a figure which shows the force applied to the edge part of the roll product which touches a long side, when packaging a roll product in two rows. FIG. 6 is a diagram illustrating a method of calculating a distance W between long sides and an inclination angle θ. It is sectional drawing which shows the dimension of the cylindrical packaging bag before gusset folding.

Hereinafter, embodiments of the present invention will be described. In the following description, the gripper 4 side of the packaging bag 100 is referred to as an “upper end” side, and the opposite side is referred to as a “lower end” side.
FIG. 1 shows a perspective view of a roll product package 200 according to an embodiment of the present invention. The roll product package 200 is configured such that two or three rows of roll products 50 to be described later are arranged in two rows or three rows in an axial direction in a packaging bag 100 made of a film. The direction in which two roll products 50 are arranged is referred to as a longitudinal direction L.
The packaging bag 100 includes a main body 6 and a grip 4 on the upper end side of the main body 6. As shown in the cross-sectional view 2, the packaging bag 100 is symmetrically folded inward as gussets 8 on both left and right sides of a tubular (cylindrical) film, and the folded edge 8a of each gusset 8 is in the longitudinal direction L of the packaging bag 100. (See FIG. 1.) It is formed by folding it in a planar shape so as to be close to the center, and joining the folded portion at the upper end by heat sealing or the like. The rectangular flat portion integrated and fixed by the heat seal in this manner forms the grip portion 4.
The main body 6 has an opening at the lower end, accommodates a roll product from the lower end side, and heat seals the opening end to form a sealing portion 201. When the roll product is stored, the gusset of the main body 6 is unfolded, and the main body 6 has a substantially rectangular parallelepiped with a rectangular cross section having four side surfaces 6a to 6d.

The gripping portion 4 extends upwardly from the opposing long sides 45 and 55 of the main body 6 in a gable roof shape and is joined to each other, and is formed between the long sides 45 and 55 and the gripping portion 4. Each of the panel sections 41, 51 having a gable roof shape is formed so as to be inclined. The panel section 41 has a long side 45 and a panel section mountain fold line 43, and the panel section mountain fold line 43 is in the longitudinal direction. It is perpendicular to L and constitutes the end edge of the panel portion 41 on the wife side. Similarly, the panel part 51 has a long side 55 and a panel part mountain ridge line 53, and the panel part mountain ridge line 53 is perpendicular to the longitudinal direction L and forms an end edge of the panel part 51 on the wife side. ing. The panel part mountain ridge lines 43 and 53 are located in the same direction.

  In addition, a substantially oval slit-shaped finger-holding hole 2 having a non-cutout portion facing upward is provided substantially at the center of the grip portion 4. Then, when the purchaser transports the roll product package 200, the slit of the finger hole 2 is cut out, and a piece having the non-cutout portion as a fixed end is folded upward. Does not occur, does not hurt the finger. However, the shape of the finger hole 2 is not limited to this. For example, a known method such as two finger holes 2 as in Patent Document 1 can be adopted.

  The roll product 6 is formed by winding a 2 ply sheet of sanitary thin paper, for example, a roll of toilet paper. The winding length of the roll product 6 is 63 to 103 m, the mass excluding the core (core) is 200 to 360 g, and the winding hardness is 1.0 to 3.0 mm.

If the winding length of the roll product 6 is less than the above lower limit, the winding length per roll becomes short, the frequency of replacing the rolls increases, and space saving during storage cannot be achieved. When the roll length of the roll product 6 exceeds the above upper limit, the roll diameter (outer diameter of the roll) becomes too large compared to the conventional roll product, and it is difficult to fit in a toilet paper holder or the like. The winding length is preferably from 70 to 85 m, and more preferably from 73 to 78 m.
When the mass of the roll product 6 excluding the core is less than the above lower limit, the winding length per roll becomes short, the frequency of replacing the rolls increases, and space saving during storage cannot be achieved. If the mass of the roll product 6 excluding the core exceeds the above upper limit, the roll length is too long and the roll diameter (outer diameter of the roll) becomes too large as compared with a conventional roll product, and it is difficult to fit in a toilet paper holder or the like. The mass of the roll product 6 excluding the core is preferably from 220 to 330 g, more preferably from 245 to 280 g.
In addition, the winding length per roll of the usual 2 ply toilet paper is about 25 m, and the mass is about 90 g.

When the winding hardness of the roll product 6 is less than the lower limit, the toilet roll is too hard, and the roll feel is inferior (softness). When the roll hardness of the roll product 6 exceeds the above upper limit, when the roll is wrapped with a film, the roll is crushed and the appearance is deteriorated.
The roll hardness of the roll product is preferably 1.1 to 2.5 mm, more preferably 1.3 to 2.2 mm.
The winding hardness is measured as follows using a compression tester (KES-G5, a handy compression tester manufactured by Kato Tech Co., Ltd.). First, the roll product 6 is placed horizontally on a hard table so that the axis is horizontal. An acrylic plate (width 4 cm, long side length 12 cm, thickness 2 mm) is placed on the upper surface of the roll such that the long side of the acrylic plate is parallel to the roll width direction (generally about 110 to 115 mm). . At this time, the weight of the acrylic plate is about 11 g so that the roll is not crushed by the weight of the acrylic plate. Next, the above-mentioned KES-G5 compressor (area: 2.0 cm ² ) is pressed into the center of the acrylic plate at a speed of 0.01 cm / sec. Asshukuko is the indentation depth when the pressure pressing the acrylic plate 0.5gf / cm ² T0, the indentation depth when the pressure of 500 gf / cm ² as Tm, the difference between Tm and T0 (Tm-T0) Is the winding hardness. By using an acrylic plate without directly compressing the roll with a compressor, the roll can be pressed over the entire width, and the crushability of the roll when wrapped with a film can be evaluated. The measurement measures 10 rolls and averages the measurement results.

The basis weight of the film constituting the packaging bag 100 is 18 to 43 g / m ² .
If the basis weight of the film is less than 18 g / m ² , the strength is reduced, and the packaging bag is broken during transportation of the package. If the basis weight of the film exceeds 43 g / m ² , the strength becomes too high, and when the roll product is packaged, the force for tightening the roll product increases, and the roll product is easily crushed or the film becomes rough. The basis weight of the film is preferably 22~38g / ^{m 2,} more preferably 27~34g / ^{m 2.}
The material of the film is not limited, but a composition containing polyethylene that is difficult to break (easily expands) is preferable. In addition, one side of the film may be printed, and the printing surface (printing layer) may be on the outer surface (the surface touched by a consumer) of the packaging bag 100 or on the inner surface (such as a toilet roll in the packaging bag 100). Surface) side. However, when the printed layer is located on the outer surface side of the packaging bag 100, the printed layer may be damaged or peeled off due to rubbing or the like when displaying the product of the roll product package. Is preferred. When the film has a laminated (laminate) structure, both sides of the print layer are sandwiched between the films, so that the print layer is hardly scratched when facing the inner or outer surface, but increases the cost.

  A long roll of toilet paper having the above-mentioned roll length, mass, and roll hardness has a weight of one roll greater than that of normal toilet paper, and therefore, when wrapped with a film for normal toilet paper, the film is easily broken. On the other hand, when the basis weight of the film is increased to increase the strength, the force for tightening the roll product is increased, and the roll product is easily crushed. Therefore, the present invention defines the strength (basis weight) of the film in an appropriate range.

Further, when the long roll product 50 is packaged in the gusset-type packaging bag 100, a load is applied between the long sides 45, 55 of the packaging bag 100 and the gripping portion 4, and the portion (in contact with the long sides 45, 55) is formed. ) The end of the roll product 50 is easily crushed. Therefore, as shown in FIG. 3, in the present invention, the inclination angle θ of the panel portions 41, 51 from the long sides 45, 55 to the gripping portion 4 is set to 25 to 45 degrees, and the distance W between the long sides 45, 55 is set to W. Is set to 105 to 134 mm. Thus, the load applied to the end of the roll product 50 in contact with the long sides 45 and 55 is reduced, so that the roll product stored in the gusset-type packaging bag can be hardly crushed.
The inclination angle θ is an angle formed by the panel section 41 with respect to a horizontal plane, as shown in FIG.

The reason will be described with reference to FIG. In FIG. 4, the force required to lift the roll product package 200 by the holding unit 4 is assumed to be 2F. The force 2F acts at the end of the roll product 50 in contact with the long sides 45 and 55, respectively, as a half force F. Since the force F acts as a component force of (F / sin θ) in the directions of the panel portions 41 and 51, the larger the θ becomes, the smaller the (F / sin θ) becomes, and the force of the roll product 50 in contact with the long sides 45 and 55 becomes larger. The load on the end is reduced. Therefore, θ is specified to be 25 degrees or more.
From this, it is preferable that θ is large. However, if θ is too large, the panel units 41 and 51 rise too much, and the gap G between the panel units 41 and 51 and the upper end of the roll product 50 increases. As a result, the roll product 50 moves within the packaging bag 100, resulting in inferior stability or an excessively large θ, which increases the size of the packaging bag 100 and increases costs, which is not preferable. Therefore, θ is specified to be 45 degrees or less.

Next, the reason why the roll products 50 are arranged in a line and packaged will be described with reference to FIG. FIG. 5 shows a mode in which the roll products 50 are arranged in two rows and packaged by gusset folding.
In FIG. 5, as in FIG. 4, the larger the value of θ becomes, the smaller (F / sin θ) becomes, and the load applied to the end of the roll product 50 in contact with the long sides 45, 55 can be reduced. However, when the roll products 50 are arranged in two rows, the distance between the long sides 45 and 55 is about twice (2 W) the width W when the long sides 45 and 55 are in one row, and the panel parts 41 and 51 and the roll products 50 are proportionally proportional thereto. Since the gap with the upper end is also doubled (2 G), the roll product 50 easily moves in the packaging bag 100.
For this reason, in order to reduce the gap between the panel portions 41 and 51 and the upper end of the roll product 50, the inclination angle φ of the panel portion 51x (the same applies to the panel portion 41) is set to θ as indicated by a chain line in FIG. As a result, the component force (F / sinφ) acting in the directions of the panel portions 41 and 51 increases, and the roll product is easily crushed.

The measurement of the interval W is performed as follows. First, as shown in FIG. 6, in a packaged state, the winding diameters DR1 and DR2 of each of the uppermost roll products 50 are measured with a ruler, and the values (total of two locations) are averaged. , 55. Here, in the short side direction of the roll product package 200, the packaging bag 100 is in close contact with the outer periphery of each roll product 50, so that the maximum diameter of each roll product 50 in the short side direction of the roll product package 200 is determined. Are regarded as winding diameters DR1 and DR2. The winding diameters DR1 and DR2 are values including the thickness of the packaging bag 100.
In addition, when the packaging bag 100 at the measurement point of the winding diameters DR1 and DR2 is printed and the roll product 50 inside the packaging is not clearly seen and the measurement of the winding diameter is difficult, the measurement is performed after peeling off the film. (However, in this case, when measuring the following inclination angle θ, another roll product package 200 is used).

  Next, the grip part 4 of the roll product package 200 is gently lifted. At this time, if the grip portion 4 has the finger hole 2, the finger hole 2 is used. Ten seconds after the lifting, as shown in FIG. 6, the lengths PL1, PL2 of the panel portion 41 and the lengths PL3, PL4 of the panel portion 51 are sequentially measured with a ruler while being lifted. Here, the “length of the panel portion” is a length (distance) from each of the long sides 45 and 55 to the grip portion 4. Further, as described above, since the packaging bag 100 is in close contact with the outer periphery of each roll product 50, the length of the panel portion also changes depending on the positions of the long sides 45 and 55. Therefore, the length (distance) from the position where the winding diameters DR1 and DR2 are measured to the gripping portion 4 among the long sides 45 and 55 is defined as the length of the panel portion. In FIG. 6, PL1, PL2, PL3, and PL4 are shown obliquely with respect to the width direction to distinguish them from the line segments representing the winding diameters DR1 and DR2. However, in practice, several lengths of the long sides 45 and 55 are measured around the position where the winding diameters DR1 and DR2 are measured and up to the grip portion 4, and the shortest distance is the length of the panel portion.

Then, four values of the lengths PL1 to PL4 of the panel portions 41 and 51 are averaged, and this is defined as the panel portion length PL. Next, the inclination angle θ is calculated from cos θ = (W ÷ 2) / PL.
The above-described calculation of the inclination angle θ is separately performed for each of the five roll product packages 200, and the average value of these five values is adopted as the inclination angle θ.

The inclination angle θ is preferably 28 to 42 degrees, more preferably 31 to 39 degrees. The interval W is preferably from 108 to 125 mm, and more preferably from 113 to 119 mm.
In addition, since the interval W can be regarded as being equal to the winding diameter of the roll product 50, the winding diameter is preferably from 105 to 134 mm, more preferably from 108 to 125 mm, and preferably from 113 to 119 mm. Most preferred.

The length of the gripping portion 4 along the long sides 45 and 55 is preferably 72% or more of the winding diameter × 2, more preferably 77% or more of the winding diameter × 2, and even more preferably 82% of the winding diameter × 2. % Or more, most preferably 87% or more of the winding diameter × 2. In addition, the upper limit of the length of the holding part 4 is a winding diameter x2.
If the length of the gripping portion 4 is less than 72% of the winding diameter × 2, both ends of the gripping portion 4 along the long sides 45 and 55 are located significantly inside the roll product 50. There is no margin in the length between the packaging bag 100 on the short side sandwiched between the long sides 45 and 55, and the packaging bag 100 on the short side is pulled. For this reason, the load applied to the end of the roll product 50 in contact with the short side is increased, and the roll product 50 stored in the gusset-type packaging bag may be crushed.

In addition, as shown in FIG. 7, the length of the holding part 4 can be adjusted. In FIG. 7, when the winding diameter of the roll product 50 is 117 mm, the outer peripheral length when two roll products 50 are arranged in a line is calculated to be 602 mm, and the cylindrical packaging bag 100 having some margin is provided. An example of the circumference is 610 mm.
In the packaging bag 100 of FIG. 7A, since the length in the longitudinal direction (= length of the grip portion) is 215 mm and the length of the gusset portion is 45 mm, the length of the grip portion 4 is (winding diameter × 2), which is 92% (= 215 mm ÷ 234 mm).
On the other hand, in the packaging bag 100 of FIG. 7A, the length in the longitudinal direction (= length of the grip portion) is shortened to 165 mm, and the length of the gusset portion is set to 70 mm. , (Winding diameter × 2) 71% (= 165 mm ÷ 234 mm).

In particular, when the winding hardness of the roll product / the basis weight of the film is controlled, the roll product is less likely to be crushed and the strength of the film can be made appropriate.
Specifically, (winding hardness (mm) / basis weight of film (g / m ² )) is preferably 0.033 to 0.11 (mm / (g / m ² )), more preferably 0.1 to 0.11 (mm / (g / m ² )). ^{040~0.10 (mm / (g / m} 2)), and most preferably at ^{0.045~0.080 (mm / (g / m} 2)).
When the winding hardness is fixed, when the basis weight of the film is increased, the value of (winding hardness / basis weight of the film) decreases, which means that the strength with which the film tightens the roll increases. Conversely, an increase in the value of (winding hardness / basis weight of the film) means that the strength of the film is weakened.
On the other hand, when the basis weight of the film is constant, when the roll is softened and the value of the winding hardness increases, the value of (winding hardness / basis weight of the film) increases, meaning that the roll is easily crushed. I do. Conversely, a smaller value of (winding hardness / basis weight of the film) means that the strength of the film is weaker.
Therefore, by setting the value of (winding hardness / basis weight of film) in an appropriate range, the roll product is more difficult to be crushed and the strength of the film can be made appropriate.

The basis weight per sheet of the roll product is preferably more than 13 g / m ² and 17 g / m ² or less, more preferably 13.5 to 16.5 g / m ² , and most preferably 14.1 to 16.0 g. / M ² .
If the basis weight of the sheet is less than the above lower limit, the strength may be reduced and the usability (bulkness) may also be reduced. If the basis weight of the sheet exceeds the above upper limit, the feeling of use may be reduced due to the sheet feeling hard, or the winding diameter may be increased when the sheet is wound for a long time, making it difficult to attach the sheet to the paper holder.
The sheet thickness is preferably 0.60 to 1.10 mm / 10, more preferably 0.65 to 0.90 mm / 10, and most preferably 0.65 to 0.83 mm / 10.
As a method for adjusting the basis weight and the paper thickness of the sheet to the above ranges, the calendering condition (paper thickness and specific volume after calendering) and the embossing condition (paper thickness and specific volume after embossing) of the base paper web of sanitary thin paper are used. Is defined.

As the strength of the sheet, DMDT (Dry Machine Direction Tensile strength) is defined as the longitudinal tensile strength at the time of drying based on JIS P8113, and DCDT (Dry Cross Direction Tensile strength) is defined as the transverse tensile strength at the time of drying.
The DMDT of the sheet (2 ply) is preferably 2.2 to 5.0 N / 25 mm, more preferably 2.5 to 4.5 N / 25 mm, and most preferably 2.7 to 4.0 N / 25 mm. The DCDT of the sheet (2 ply) is preferably 0.8 to 2.2 N / 25 mm, more preferably 0.9 to 1.8 N / 25 mm, and most preferably 1.0 to 1.5 N / 25 mm.
If the DMDT and DCDT are less than the above values, they may be easily broken and may not be suitable for practical use. When DMDT and DCDT are higher than the above values, the resin becomes hard, and the softness may be impaired.
In addition, the flow direction of the papermaking of the sanitary thin paper is defined as “vertical direction”, and the direction perpendicular to the flow direction is defined as “transverse direction”.

Specific volume of the sheet is preferably 4.0~6.5cm ³ / g, more preferably 4.3~6.1cm ³ / g, most preferably 4.7~5.6cm ³ / g.
If the specific volume is less than the above range, the feeling of use may be poor, or the bulk (bulk) may be reduced, resulting in poor water absorbing ability. On the other hand, when the specific volume exceeds the above range, the bulk (bulk height) increases, but the smoothness may be poor or the tactile sensation may be poor.

It is preferable that the thickness of the film constituting the packaging bag 100 is 20 to 47 μm. If the thickness of the film is less than 20 μm, the strength is reduced, and the packaging bag may be broken during transportation of the package. If the thickness of the film exceeds 47 μm, the strength becomes too high, and when the roll product is packaged, the force for tightening the roll product increases, and the roll may be easily crushed. The thickness of the film is more preferably 25 to 42 μm, and still more preferably 30 to 37 μm.
The density of the film is preferably 0.5 to 1.3 g / cm ³ , more preferably 0.6 to 1.2 g / cm ³ , and still more preferably 0.7 to 1.1 g / cm ³ .
The packaging bag 100 may be provided with a perforation for opening. The perforations may be formed so as to extend in either the vertical direction or the horizontal direction of the roll product package, but are preferably formed in the vertical direction.

  It goes without saying that the present invention is not limited to the above embodiments, but extends to various modifications and equivalents included in the spirit and scope of the present invention.

  A sheet of sanitary tissue paper mixed so that the content (mass%) of the pulp composition is NBKP 10%, LBKP 60%, and waste paper pulp derived from a milk pack 30% is formed, and the sheet is laminated and wound into 2 ply. A toilet roll product 50 having the indicated characteristics was produced. On the other hand, a polyethylene film having the physical properties shown in Table 1 was prepared as a packaging bag 100, and a toilet roll product was packaged in the form shown in FIG.

The following evaluation was performed.
1) Characteristics of sanitary tissue paper sheet Longitudinal tensile strength when dry DMDT and transverse tensile strength when dry DCDT: Based on JIS P8113, the maximum load to break for a hygienic tissue paper of the number of products (2 ply) is N. It was measured in units of / 25 mm.
Basis weight: Measured based on JIS P8124, and converted per sheet of sanitary thin paper.
Paper thickness: Measured using a thickness gauge (a dial thickness gauge “PEACOCK” manufactured by Ozaki Seisakusho). The measurement conditions were as follows: the measurement load was 3.7 kPa, the probe diameter was 30 mm, the sample was placed between the probe and the measuring table, and the gauge was read when the probe was lowered at a speed of 1 mm or less per second. In addition, it carried out on 10 sheets of sanitary thin paper. The measurement was repeated 10 times and the measurement results were averaged.
Specific volume: The thickness per sheet of sanitary thin paper was divided by the basis weight per sheet, and expressed as a volume cm ³ per unit g.

2) Characteristics of roll products Roll length: measured. For the measurement, ten rolls were measured, and the measurement results were averaged.
Winding diameter: Measured using a Diameter rule manufactured by Muratec KDS. For the measurement, the diameters of the ten rolls at the center in the axial direction of the rolls were measured, and the measurement results were averaged.
Mass of one roll excluding the core: First, the mass of one roll including the core was weighed. Next, all the sheets were removed from the roll, and the mass of the core was weighed. (Mass of one roll including core)-(mass of core) = (mass of one roll excluding core). For the measurement, ten rolls were measured, and the measurement results were averaged.
Roll hardness: Measured as described above.
Tilt angle θ: Measured as described above.

3) Characteristics of Film Basis weight: Measured based on JIS P8124, and converted to one film.
Thickness and density: Measured according to JIS P 8118 (1998). The thickness and density of the film were measured using a measuring device (product name: TM600) manufactured by Kumagaya Riki Kogyo Co., Ltd. at a pressure of 50 kPa on the pressing surface.

The following sensory evaluation was performed by 20 monitors.
Hardness of crushing of toilet roll: The degree of crushing of the roll by a film was evaluated for the toilet roll after packaging.
1 minute after holding the grip 4 of the roll product package 200, the degree of crush of the roll in contact with the film on the long sides 45 and 55 in FIG. 1 was evaluated.
Softness of toilet roll: The packaging film was removed from the toilet roll after packaging, the toilet roll was held by hand, and the softness was evaluated.
Usability of the sheet: The usability when the toilet roll was used in the toilet was evaluated.
Film strength: In the package after packaging the toilet roll, the presence or absence of tearing of the film was evaluated.
Roughness of the film: After packaging the toilet roll, the package was touched by hand to evaluate the roughness of the film.
Attaching to paper holder: The packaging film was removed from the toilet roll after packaging, and the toilet roll was attached to the paper holder and evaluated.
Roll replacement frequency: The period until one toilet roll was used up was evaluated.
Retention of the toilet roll in the packaging bag: It was visually evaluated whether the toilet roll in the packaging bag was stably held without moving.
The evaluation criteria were based on a 5 point scale. 5 points: Very good, 4 points: Good, 3 points: No problem in practical use, 2 points: Poor, 1 point: Notably poor.
Note that the measurement of the basis weight, tensile strength, paper thickness, specific volume, winding length, winding diameter, mass, winding hardness, inclination angle θ of the toilet paper, and the basis weight, thickness, and density of the film are based on JIS-P8111. The measurement was performed after maintaining the equilibrium state under the temperature and humidity conditions (23 ± 1 ° C., 50 ± 2% RH) specified in the above.

  Tables 1 and 2 show the obtained results.

As is clear from Table 1, the roll length of the roll product is 63 to 103 m, the mass of one roll excluding the core is 200 to 360 g, the roll hardness is 1.0 to 3.0 mm, and the basis weight of the film is 18 ４３43 g / m ² , and in each embodiment where the inclination angle θ and the interval W of the packaging bag are within a predetermined range, the feeling of use and the softness of the toilet roll are excellent and the winding length per roll is increased. The frequency of changing rolls has decreased. Further, when the film was made into a roll product package, the roll was not easily crushed even if the film strength was maintained, and the roll product could be stably held in the packaging bag.

On the other hand, in the case of Comparative Example 1 in which the basis weight of the film was less than 18 g / m ² , the strength of the film was reduced.
In the case of Comparative Example ^{2 in} which the basis weight of the film exceeded 43 g / m ² , the film was rough and the toilet roll was easily crushed.
In the case of Comparative Example 3 in which the roll length of the roll product was less than 63 m, the replacement frequency of the roll increased.
In the case of Comparative Example 4 in which the roll length of the roll product exceeded 103 m, the roll diameter of the roll exceeded 134 mm, so that the mountability to the paper holder was poor.
In the case of Comparative Example 5 in which the winding hardness was less than 1.0 mm, the softness of the toilet roll was poor.
In the case of Comparative Example 6 in which the winding hardness exceeded 3.0 mm, the roll was easily crushed. Also, in the case of Comparative Example 6, the roll diameter exceeded 134 mm, so that the roll was inferior to the paper holder.

In the case of Comparative Examples 7 and 8 in which the inclination angle θ of the packaging bag was less than 25 degrees, the rolls in contact with the films on the long sides 45 and 55 were crushed because the load on the panel portions 41 and 51 was large. In addition, in Comparative Example 7, two rows of roll products were arranged in two rows vertically and horizontally, and two rows were stacked and packaged.
In the case of Comparative Example 9 in which the inclination angle θ of the packaging bag exceeded 45 degrees, the toilet roll moved in the packaging bag, resulting in poor stability.
The commercially available product 1 had a winding length of 25 m per roll, and the replacement frequency of the rolls increased. Further, the value of the winding hardness was higher than 3.0 mm, and the roll was easily crushed.

2 finger hole 4 gripper 6 main body 45, 55 long side of main body 50 roll product 100 packaging bag 200 roll product package

Claims (2)

A roll product package comprising a plurality of roll products wound around a 2 ply sheet of sanitary tissue paper in a packaging bag made of film,
The roll product is packaged in the packaging bag by stacking two or three stacked rows of two in a row with the axial direction up and down,
The packaging bag is formed of a tubular gusset bag, and extends substantially in the form of a gable roof upward from a long side opposed to each other, of a substantially rectangular parallelepiped main body surrounding the roll product, and an upper side of the main body. And a holding part joined together,
A finger hole is formed in the grip portion,
The roll product has a winding length of 70 to 85 m, the mass of one roll excluding the core is 239 to 298 g, and the winding hardness is 1.2 to 2.5 mm,
The film has a basis weight of 25.5 to 34.5 g / m ² ,
The inclination angle θ of the packaging bag from the long side to the grip portion is 29 to 40 degrees,
The distance W between the long sides is 111 to 122 mm ,
A roll product package in which (the winding hardness (mm) / the basis weight (g / m ² ) of the film ) is 0.041 to 0.087 (mm / (g / m ² )) . Roll product package according to claim 1, wherein the basis weight per sheet is beyond 17 g / ^{m 2} or less 13 g / ^{m 2} of the sheet.

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