JP6721299B2 - Roll product package - Google Patents

Description

The present invention relates to a roll product package in which a plurality of thin paper roll products 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 one in which a gusset (gusset) is symmetrically folded into a tubular film of polyethylene or the like to form a main body, and an upper portion thereof is folded into a planar shape to form a grip portion (Patent Document: 1). The grip portion is provided with a finger hook hole for carrying by the purchaser. In addition, a belt-shaped gripping portion separate from the main body of the packaging bag described above is used, straddling the upper surface of the packaging bag, and both ends thereof are joined to opposite side surfaces of the main body (Patent Document 2).
On the other hand, in recent years, roll products such as toilet paper have been rolled longer than before and the effective amount of use per roll has been increased to achieve compactness during carrying and storage. ..
However, since the long roll product described above has a large weight per roll, when the consumer carries the package in which the roll product is wrapped, a load is applied to the handle and the bottom surface of the packaging bag. Therefore, in order to secure the strength of the body of the packaging bag, the handle portion, and the like, it is conceivable to make the packaging bag thick. However, if the packaging bag is made thicker to increase the strength, when the roll product is packaged, the force for tightening the roll product is increased and the roll is easily crushed, or the film becomes stiff and the touch feeling of the film deteriorates. .. Further, if the roll is tightly wound so that the roll is hard to be crushed, there is a problem that the softness when the roll is held is deteriorated.

For this reason, the applicant defines the roll length, mass, roll hardness of the roll product, and the basis weight of the film forming the packaging bag, the film is not easily torn when carried, and the roll product is not easily crushed. A roll product package has been developed (Patent Document 3).

JP, 2004-269010, A JP, 2005-153959, A JP-A-2005-101388 (Fig. 2)

By the way, although the technique described in Patent Document 3 relates to a type in which a packaging bag and a separate band-shaped gripping portion are joined together, they are joined by extending in a gable roof type from the upper side opposite to each other in the packaging bag. When a long-rolled roll product is packaged in a gusset type provided with a gripping part, a load is applied between the upper side of the packaging bag and the gripping part, and the end part of the roll product in this part may be crushed.
Therefore, 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 the roll product is difficult to be crushed when the roll product having an appropriate winding hardness is packaged, An object of the present invention is to provide a roll product package capable of stably holding a roll product in a bag.

In order to solve the above-mentioned problems, the roll product package of the present invention is a roll product package in which a plurality of roll products obtained by winding a 1 ply sheet of sanitary thin paper are contained in a packaging bag made of a film. Are stacked in the packaging bag by stacking two or three layers in a row with the axial direction up and down, and the packaging bag is composed of a tubular gusset bag and surrounds the roll product. There is a rectangular parallelepiped main body portion, and a grip portion that is joined by extending in a gable roof type from upper sides of the main body portion facing each other upward, and the grip portion has a finger hook hole. Is formed, the roll length of the roll product is 127 to 160 m, the weight of one roll excluding the core is 266 to 337 g, and the winding hardness is 1.1 to 2.4 mm. The amount is 25.8 to 34.7 g/m ² , the inclination angle θ of the packaging bag from the long side to the grip portion is 28 to 40 degrees, and the interval W between the long sides is 112 to. 127 mm 2 , (rolling hardness (mm)/basis weight (g/m ² ) of the film ) is 0.038 to 0.084 (mm/(g/m ² )) .

It is preferred basis weight per sheet of the previous SL sheet is 16~22g / ^{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 the roll product is not easily crushed when the roll product having an appropriate winding hardness is packaged, A roll product package capable of stably holding the roll product in the bag is obtained.

It is a perspective view of the roll product package concerning the embodiment of the present invention. It is sectional drawing of the packaging bag before storing a roll product. It is a front view which shows a roll product package. It is a figure which shows the force applied to the edge part of the roll product which contact|connects a long side. It is a figure which shows the force applied to the edge part of the roll product which contact|connects a long side, when a roll product is packed in two rows. It is a figure which shows the method of calculating the space|interval W between long sides, and the inclination angle (theta). It is sectional drawing which shows the dimension of the cylindrical packaging bag before a gusset fold.

Hereinafter, embodiments of the present invention will be described. In the following description, the grip portion 4 side of the packaging bag 100 will be referred to as the “upper end” side, and the opposite side will be referred to as the “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 includes a packaging bag 100 made of a film, and two or three stages in which two roll products 50, which will be described later, are arranged in a line with the axial direction being vertically arranged in a stacked manner. 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 portion 6 and a grip portion 4 on the upper end side of the main body portion 6. As shown in the sectional view 2, the packaging bag 100 is symmetrically folded inward with the tubular (cylindrical) film as the gusset 8 on both left and right sides, and the folding edge 8a of each gusset 8 is the longitudinal direction L of the packaging bag 100. (Refer to FIG. 1) It is folded in a plane shape so as to be close to each other in the vicinity of the center, and the folded portion is joined at a proper position at the upper end by heat sealing or the like. The rectangular flat portion thus integrated and fixed by heat sealing forms the grip portion 4.
The main body 6 has a lower end opened, a roll product is accommodated from the lower end side, and the opening end is heat-sealed to form a sealing portion 201. Further, when the roll product is stored, the gusset of the main body portion 6 is expanded, and the main body portion 6 is configured to have a substantially rectangular parallelepiped shape with a rectangular cross section having four side surfaces 6a to 6d.

The grip part 4 is formed by extending from the long sides 45, 55 facing each other of the upper side of the main body part 6 upward and joining them in a gable roof shape, respectively, and between the long sides 45, 55 and the grip part 4. In addition, the panel part 41 in which the gable roof-shaped panel parts 41 and 51 are respectively formed to be inclined has a long side 45 and a panel part mountain fold ridge line 43, and the panel part mountain fold ridge line 43 is in the longitudinal direction. It is perpendicular to L and constitutes an end edge of the panel portion 41 on the end side. Similarly, the panel portion 51 has a long side 55 and a panel portion mountain fold ridge line 53, and the panel portion mountain fold ridge line 53 is perpendicular to the longitudinal direction L and constitutes an end edge of the panel portion 51 on the end side. ing. In addition, the panel part mountain fold ridgelines 43 and 53 are located in the same direction.

In addition, a substantially elliptic slit-shaped finger hook hole 2 having an upward non-cutout portion is provided at substantially the center of the grip portion 4. When the purchaser cuts out the slit of the finger hook hole 2 when carrying the roll product package 200 and folds back the piece having the non-cutout portion as the fixed end, the folded back portion bends in a U shape, so that a sharp end face is formed. It won't happen and your fingers won't hurt. However, the shape of the finger hook hole 2 is not limited to this. For example, as in Patent Document 1, a known method such as using two finger-holding holes 2 can be adopted.

The roll product 6 is formed by winding a 1 ply sheet of sanitary thin paper, and is a roll of toilet paper, for example. The roll product 6 has a winding length of 110 to 185 m, a mass excluding a core (core) of 220 to 390 g, and a winding hardness of 0.9 to 2.9 mm.

If the roll length of the roll product 6 is less than the above lower limit value, the roll length per roll becomes short, the roll replacement frequency increases, and space saving during storage cannot be achieved. If the roll length of the roll product 6 exceeds the above upper limit value, the roll diameter (outer diameter of the roll) becomes too large as compared with the conventional roll product, and it becomes difficult to fit it in a toilet paper holder or the like. The winding length is preferably 125 to 170 m, and more preferably 135 to 155 m.
If the mass of the roll product 6 excluding the core is less than the lower limit value described above, the roll length per roll is short, the roll replacement frequency is high, and space saving during storage cannot be achieved. If the mass of the roll product 6 excluding the core exceeds the upper limit value described above, the roll length is too long and the roll diameter (outer diameter of the roll) becomes too large as compared with the conventional roll product, which makes it difficult to fit in a toilet paper holder or the like. The mass excluding the core of the roll product 6 is preferably 250 to 360 g, and more preferably 280 to 330 g.
The roll length of a normal 1-ply toilet paper is about 50 m and the mass is about 115 g.

If the roll hardness of the roll product 6 is less than the above lower limit, the toilet roll is too hard and the roll feel (softness) is poor. If the roll hardness of the roll product 6 exceeds the above upper limit value, the roll is crushed when the roll is wrapped with a film, resulting in poor appearance.
The roll hardness of the roll product is preferably 1.0 to 2.4 mm, more preferably 1.2 to 2.1 mm.
The winding hardness is measured as follows using a compression tester (Handy compression tester KES-G5 manufactured by Kato Tech Co., Ltd.). First, the roll product 6 is placed sideways on a hard table so that the axis is horizontal. Place an acrylic plate (width 4 cm, long side length 12 cm, thickness 2 mm) on the upper surface of the roll so 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 KES-G5 compressor (area 2.0 cm ² ) is pressed into the center of the acrylic plate under the condition of 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 pushed 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 forming the packaging bag 100 is 18 to 43 g/m ² .
When the basis weight of the film is less than 18 g/m ² , the strength is lowered and the packaging bag is broken during transportation of the package. When 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 stiff. The basis weight of the film is preferably 22 to 38 g/m ² , and more preferably 27 to 34 g/m ² .
The material of the film is not limited, but a composition containing polyethylene that is difficult to break (elongates easily) is preferable. Further, one side of the film may be printed, and the printing side (printing layer) may be on the outer side (the side that the consumer touches with hands) of the packaging bag 100 or the inner side (contact with the toilet roll or the like in the packaging bag 100). It may be on the surface side. However, when the print layer is located on the outer surface side of the packaging bag 100, the print layer may be scratched or peeled off due to rubbing or the like when the product in the roll product package is displayed. Therefore, the print layer is directed to the inner surface of the packaging bag 100. It is preferable. When the film has a laminated (laminate) structure, both surfaces of the print layer are sandwiched between the films, and scratches are unlikely to be directed toward either the inner or outer surface of the print layer, but the cost increases.

The long roll toilet paper having the roll length, the mass and the roll hardness described above has a heavier weight of one roll than the normal toilet paper, and therefore the film is easily torn when wrapped with a normal toilet paper film. On the other hand, when the basis weight of the film is increased and the strength is increased, 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.

Furthermore, when the long roll product 50 is packaged in the gusset type packaging bag 100, a load is applied between the long sides 45 and 55 of the packaging bag 100 and the grip portion 4, and the (long sides 45 and 55 of this portion are in contact with each other. ) 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 and 51 from the long sides 45 and 55 to the grip portion 4 is set to 24 to 44 degrees, and the interval W between the long sides 45 and 55 is W. Is 105 to 134 mm. As a result, the load applied to the end portions 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 made difficult to crush.
The tilt angle θ is an angle formed by the panel portion 41 with respect to the horizontal plane as shown in FIG.

The reason for this will be described with reference to FIG. In FIG. 4, the force required to lift the roll product package 200 by the grip portion 4 is 2F. This force 2F acts as a half force F at the end of the roll product 50 in contact with the long sides 45 and 55, respectively. Since the force F acts as a component force of (F/sin θ) in the direction of the panel portions 41 and 51, respectively, the larger θ becomes, the smaller (F/sin θ) becomes, and the roll product 50 contacting the long sides 45 and 55 The load on the ends is reduced. Therefore, θ is specified to be 24 degrees or more.
From this, it is preferable that θ is large, but if θ is too large, the panel portions 41 and 51 rise too much, and the gap G between the panel portions 41 and 51 and the upper end of the roll product 50 becomes large. As a result, the roll product 50 moves in the packaging bag 100 to deteriorate the stability, and since θ is excessively increased, the size of the packaging bag 100 increases and the cost increases, which is not preferable. Therefore, θ is specified to be 44 degrees or less.

Next, with reference to FIG. 5, the reason why the roll products 50 are lined up in a line and packaged will be described. FIG. 5 shows an embodiment in which the roll products 50 are arranged in two rows and packaged by gusset folding.
In FIG. 5, similarly to FIG. 4, the larger θ becomes, the smaller (F/sin θ) becomes, and the load applied to the end portions of the roll product 50 in contact with the long sides 45 and 55 can be reduced. However, when the roll products 50 are arranged in two rows, the distance between the long sides 45, 55 is about twice (2 W) the distance W in the case of one row, and the proportion of the panel parts 41, 51 and the roll products 50 is proportionally increased. Since the gap with the upper end is also doubled (2G), the roll product 50 becomes easy to move 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 (same for the panel portion 41) is θ as shown by the chain line in FIG. Therefore, the component force (F/sin φ) acting in each of the panel portions 41 and 51 increases, and the roll product is easily crushed.

The interval W is measured as follows. First, as shown in FIG. 6, the winding diameters DR1 and DR2 of the uppermost roll products 50 are measured with a ruler in the packaged state, and these values (total of 2 places) are averaged to obtain the long side 45 , 55 is the distance W between them. Here, since the packaging bag 100 is configured to adhere to the outer circumference of each roll product 50 in the short side direction of the roll product package 200, the maximum diameter of each roll product 50 in the short side direction of the roll product package 200 The parts to be wound are regarded as the winding diameters DR1 and DR2. Further, 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 location of the winding diameters DR1 and DR2 is printed and the roll product 50 inside the packaging is not clearly visible, and it is difficult to measure the winding diameter, peel off the film and measure. (However, in this case, another roll product package 200 is used when measuring the following inclination angle θ).

Next, the grip 4 of the roll product package 200 is gently lifted. At this time, when the grip portion 4 has the finger hook hole 2, the finger hook hole 2 is used. After 10 seconds from the lifting, as shown in FIG. 6, the lengths PL1 and PL2 of the panel portion 41 and the lengths PL3 and PL4 of the panel portion 51 are sequentially measured with a ruler while being lifted. Here, the “length of the panel portion” is the length (distance) from each long side 45, 55 to the grip portion 4. Further, since the packaging bag 100 is in close contact with the outer periphery of each roll product 50 as described above, the length of the panel portion changes depending on the position of each long side 45, 55. Therefore, the length (distance) from the position where the winding diameters DR1 and DR2 are measured on each of the long sides 45 and 55 to the grip portion 4 is defined as the length of the panel portion. Note that, in FIG. 6, PL1, PL2, PL3, and PL4 are depicted obliquely with respect to the width direction in order to distinguish them from the line segments that represent the winding diameters DR1 and DR2. However, in practice, several lengths up to the grip portion 4 are measured around the position where the winding diameters DR1 and DR2 are measured on each of the long sides 45 and 55, and the shortest distance among them is set to the length of the panel portion.

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

The inclination angle θ is preferably 27 to 41 degrees, and more preferably 30 to 38 degrees. The distance W is preferably 110 to 129 mm, and more preferably 115 to 124 mm.
Since the interval W can be regarded as the same as the winding diameter of the roll product 50, the winding diameter is preferably 105 to 134 mm, more preferably 110 to 129 mm, and even more preferably 115 to 125 mm. Most preferred.

The length of the grip 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, and most preferably 87% or more of the winding diameter×2. The upper limit of the length of the grip portion 4 is the winding diameter×2.
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, 55 direction are located significantly inside the roll product 50, so that both ends of the gripping portion 4 are located. There is no margin in length between the short side packaging bag 100 sandwiched between the long sides 45 and 55, and the short side packaging bag 100 is pulled. Therefore, the load applied to the end of the roll product 50 in contact with the short side increases, and the roll product 50 stored in the gusset type packaging bag may be crushed.

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

In particular, by controlling the winding hardness of the roll product/the basis weight of the film, the roll product is less likely to be crushed and the strength of the film can be made appropriate.
Specifically, (rolling hardness (mm)/basis weight of film (g/m ² )) is preferably 0.030 to 0.105 (mm/(g/m ² )), and more preferably 0. ^{035~0.090 (mm / (g / m} 2)), and most preferably at ^{0.040~0.075 (mm / (g / m} 2)).
When the winding hardness is constant and the basis weight of the film is increased, the value of (rolling hardness/basis weight of the film) is decreased, and the strength with which the film tightens the roll is increased. On the other hand, when the value of (rolling hardness/basis weight of film) increases, the strength of the film decreases.
On the other hand, when the basis weight of the film is constant, the value of (rolling hardness/basis weight of film) increases as the roll becomes softer and the winding hardness value increases, meaning that the roll easily collapses. To do. On the contrary, when the value of (rolling hardness/basis weight of film) becomes small, it means that the strength of the film becomes weak.
Therefore, by setting the value of (rolling hardness/basis weight of film) in an appropriate range, the roll product is less likely to be crushed, and the strength of the film can be made appropriate.

The basis weight of each sheet of the roll product is preferably 16 to 22 g/m ² , more preferably 16 to 21 g/m ² , and most preferably 17 to 20 g/m ² .
When the grammage of the sheet is less than the lower limit value described above, the strength may be reduced and the usability (bulkiness) may be reduced. When the grammage of the sheet exceeds the upper limit value described above, the sheet may feel stiff and the usability may deteriorate, or the winding diameter may increase when the sheet is wound for a long time, which makes it difficult to mount the sheet on a paper holder.
The sheet thickness of the sheet is preferably 0.6 to 1.4 mm/10 sheets, more preferably 0.7 to 1.3 mm/10 sheets, and most preferably 0.8 to 1.2 mm/10 sheets.
As a method for adjusting the basis weight and the paper thickness of the sheet within the above ranges, calender conditions (paper thickness and specific volume after calendering) and embossing conditions (paper thickness and specific volume after embossing) of the base paper web of sanitary thin paper are used. The method of prescribing is mentioned.

As the strength of the sheet, DMDT (Dry Machine Direction Tensile strength) is defined as the longitudinal tensile strength during drying based on JIS P8113, and DCDT (Dry Cross Direction Tensile strength) is defined as the lateral tensile strength during drying.
The DMDT of the sheet (1 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 (1 ply) is preferably 0.8 to 2.2 N/25 mm, more preferably 0.9 to 1.8 N/25 mm, most preferably 1.0 to 1.5 N/25 mm.
If DMDT and DCDT are less than the above values, they may be easily shaken and not suitable for practical use. When DMDT and DCDT are higher than the above-mentioned values, it becomes hard and softness may be impaired.
The flow direction of sanitary thin paper is defined as "longitudinal direction" and the direction perpendicular to the flow direction is defined as "transverse direction".

The specific volume of the sheet is preferably 4.0 to 7.5 cm ³ /g, more preferably 4.7 to 7.0 cm ³ /g, and most preferably 5.5 to 6.5 cm ³ /g.
If the specific volume is less than the above range, the feeling of use may be poor, or the bulk (bulkness) may be reduced, resulting in poor water absorption capacity. On the other hand, when the specific volume exceeds the above range, the bulk (bulkness) is increased, but the smoothness may be deteriorated or the feel may be deteriorated.

The film forming the packaging bag 100 preferably has a thickness of 20 to 47 μm. When the thickness of the film is less than 20 μm, the strength is lowered 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 may increase and the roll may be easily crushed. The thickness of the film is more preferably 25 to 42 μm, further 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 further preferably 0.7 to 1.1 g/cm ³ .
The packaging bag 100 may be provided with perforations 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 is needless to say that the present invention is not limited to the above-described embodiment and covers various modifications and equivalents included in the concept and scope of the present invention.

A sheet of sanitary thin paper was blended so that the content (mass %) of the pulp composition was 5% NBKP, 60% LBKP, and 35% waste paper pulp derived from a milk carton. Roll product 50 was produced. The core of the toilet roll product 50 had an outer diameter of 39 mm. 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. 1 to obtain a roll product package 200.

The following evaluation was performed.
1) Characteristics of sanitary thin paper sheets Tensile strength in dry direction DMDT and transverse tensile strength in dryness DCDT: Based on JIS P8113, the maximum load to break is N for sanitary thin paper sheets of product number (1 ply). 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 (dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho). The measurement conditions were a measurement load of 3.7 kPa, a probe diameter of 30 mm, a 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, 10 sheets of sanitary thin paper were stacked. 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 the volume was expressed in cm ³ per unit g.

2) Characteristics of roll product Roll length: Measured. For the measurement, 10 rolls were measured and the measurement results were averaged.
Roll diameter: Measured using a diameter rule manufactured by Muratec KDS Co., Ltd. For the measurement, the diameter of the 10 rolls at the center in the axial direction was measured, and the measurement results were averaged.
Mass of 1 roll excluding core: First, the mass of 1 roll containing the core was weighed. Then all sheets were removed from the roll and the core weight was weighed. (Mass of one roll including core)-(Mass of core)=(Mass of one roll excluding core). For the measurement, 10 rolls were measured and the measurement results were averaged.
Roll hardness: Measured as described above.
Inclination angle θ: measured as described above.

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

The following sensory evaluation was performed by 20 monitors.
Difficulty of collapsing of toilet roll: The degree of collapsing of the roll by the film was evaluated for the packaged toilet roll.
Difficulty of crushing at the end of the toilet roll: One minute after holding the grip portion 4 of the roll product package 200, the crushing degree of the roll in contact with the film having the long sides 45 and 55 in FIG. 1 was evaluated.
Softness of Toilet Roll: With respect to the toilet roll after packaging, the packaging film was removed, the toilet roll was held by hand, and the softness was evaluated.
Seat usability: The usability of the toilet roll when used in a toilet was evaluated.
Film strength: In the package after packaging the toilet roll, the presence or absence of breakage of the film was evaluated.
Film ruggedness: After packaging the toilet roll, the package was touched by hand to evaluate the film ruggedness.
Attachability to paper holder: For the toilet roll after packaging, the packaging film was removed, and the toilet roll was attached to the paper holder for evaluation.
Frequency of roll replacement: The period until one toilet roll was used up was evaluated.
Retainability 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 standard was 5 points. 5 points: very good, 4 points: good, 3 points: no problem in practical use, 2 points: inferior, 1 point: remarkably inferior.
The basis weight of toilet paper, tensile strength, paper thickness, specific volume, winding length, winding diameter, mass, winding hardness, inclination angle θ and basis weight of film, thickness, and measurement of density are JIS-P8111. The test was carried out after the equilibrium state was maintained under the temperature and humidity conditions (23±1° C., 50±2% RH) specified in 1.

The obtained results are shown in Tables 1 and 2.

As is clear from Table 1, the roll length of the roll product is 110 to 185 m, the weight of one roll excluding the core is 220 to 390 g, the winding hardness is 0.9 to 2.9 mm, and the basis weight of the film is 18. a ~43g / m ^2, the case of the embodiments inclination angle θ and interval W of the packaging bag is in a predetermined range, is excellent in use feeling and softness of toilet rolls, a longer winding length per roll The roll replacement frequency has decreased. Furthermore, even when the strength of the film was maintained in the roll product package, the roll was not easily crushed, 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 decreased.
In the case of Comparative Example ^{2 in} which the basis weight of the film exceeded 43 g/m ² , the film was stiff and the toilet roll was easily crushed.
In the case of Comparative Example 3 in which the roll length of the roll product is less than 110 m, the roll replacement frequency was high.
In the case of Comparative Example 4 in which the roll length of the roll product exceeded 185 m, the roll diameter of the roll exceeded 134 mm, and therefore the mountability on the paper holder was poor.
In the case of Comparative Example 5 having a winding hardness of less than 0.9 mm, the softness of the toilet roll was poor.
In the case of Comparative Example 6 in which the winding hardness was more than 2.9 mm, the roll was easily crushed. Further, in the case of Comparative Example 6, since the winding diameter of the roll exceeded 134 mm, the mountability to the paper holder was poor.

In Comparative Examples 7 and 8 in which the inclination angle θ of the packaging bag was less than 24 degrees, the loads on the panel portions 41 and 51 were large, and thus the rolls in contact with the films having the long sides 45 and 55 were crushed. In Comparative Example 7, the roll product is packaged by stacking two stages in which four roll products are arranged in two rows vertically and horizontally.
In the case of Comparative Example 9 in which the inclination angle θ of the packaging bag exceeded 44 degrees, the toilet roll moved within the packaging bag and the stability was poor.
In the commercially available product 1, the winding length per roll was 50 m, and the frequency of roll replacement was high. In addition, the winding hardness value was higher than 2.9 mm, and the roll was easily crushed.

2 Finger hook hole 4 Grip part 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 in which a plurality of roll products obtained by winding a 1 ply sheet of sanitary thin paper are contained in a packaging bag made of a film,
The roll product is packaged in the packaging bag by stacking two or three stages in which two rolls are arranged in a line with the axial direction being up and down.
The packaging bag is formed of a tubular gusset bag, and has a substantially rectangular parallelepiped main body portion surrounding the roll product, and upper sides of the main body portion, which extend upward in a gable roof shape from the long sides facing each other. And a grip portion joined together,
A finger hook hole is formed in the grip portion,
The roll product has a winding length of 127 to 160 m, the weight of one roll excluding the core is 266 to 337 g, and the winding hardness is 1.1 to 2.4 mm.
The basis weight of the film is 25.8 to 34.7 g/m ² ,
The inclination angle θ of the packaging bag from the long side to the grip portion is 28 to 40 degrees,
The distance W between the long sides is 112 to 127 mm ,
A roll product package in which (rolling hardness (mm)/basis weight (g/m ² ) of the film ) is 0.038 to 0.084 (mm/(g/m ² )) . Roll product package according to claim 1, wherein the basis weight per sheet of the sheet is a 16~22g / ^{m 2.}

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