JP2017012368A - Roll product package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll product package having a long roll product packaged in a gazette type packaging bag, wherein the roll product is hardly crushed and can be stably held in the packaging bag.SOLUTION: A roll product package 200 stores a plurality of roll products 50 wound with a sheet of 2 plies of sanitary thin paper in a packaging bag 100. The roll products are gazette-packaged in a packaging bag such that they are overlaid by two or three stages while one row has 2 roll products arranged with the axis direction as a vertical direction, and have gripping 4 extended upward from long sides 45 and 55 and jointed into a gable roof shape. The roll products have a wound length of 63 to 103 m, a mass of 200 to 360 g of one roll excepting the core, and a winding hardness of 1.0 to 3.0 mm. The basis weight of the film is 18 to 43 g/m. The angle θ of the packaging bag from the long side to the grip part is 25 to 45 degrees, and the gap W between the long sides is 105 to 134 mm.SELECTED DRAWING: Figure 1

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

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

JP 2004-269010 A JP 2005-153959 A Japanese Patent Laying-Open No. 2015-101388 (FIG. 2)

By the way, although the technique of above-mentioned patent document 3 is related with the type which joined the packaging bag and the separate strip | belt-shaped holding part, it extended to a gable roof type | mold from the upper side which a packaging bag opposes upwards, and is joined. When a long roll product is packaged in a gusset type provided with a gripping portion, 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.
Therefore, the present invention is a roll product package in which a long roll product is stored in a gusset type packaging bag. When a roll product that is easy to carry and has an 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, the roll product package of the present invention is a roll product package in which a plurality of roll products obtained by winding a 2 ply sheet of sanitary thin paper in a packaging bag made of a film is stored. Is formed of a cylindrical gusset bag, and is wrapped around the roll product. A rectangular parallelepiped main body, and a gripping part that extends and joins the gable roof shape upward from the long sides facing each other among the upper sides of the main body, and the gripping part has a finger-holding hole. Is formed, 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 winding hardness is 1.0 to 3.0 mm, and the basis weight of the film is 18 ~ 43g / m ^2, and the inclination angle θ of the packaging bag from the long side to said grip portion is 25 to 45 degrees, the long side width W of each other is 105～134Mm.

It is preferable that (the winding hardness (mm) / the basis weight (g / m ² ) of the film) is 0.033 to 0.11 (mm / (g / m ² )).
The basis weight per sheet is preferably more than 13 g / m ² and 17 g / m ² or less.

  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 not easily crushed when the roll product is easy to carry and has an appropriate winding hardness. 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 which concerns on embodiment of this invention. It is sectional drawing of the packaging bag before accommodating a roll product. It is a front view which shows a roll product package. It is a figure which shows the force concerning the edge part of the roll product which touches a long side. It is a figure which shows the force concerning the edge part of the roll product which touches a long side at the time of packaging a roll product in two rows. It is a figure which shows the method of calculating the space | interval W between long sides, and inclination | tilt angle (theta). It is sectional drawing which shows the dimension of the cylindrical packaging bag before gazette folding.

Hereinafter, embodiments of the present invention will be described. In the following description, the grip 4 side of the packaging bag 100 is the “upper end” side, and the opposite side is 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 is formed by storing two or three stages of roll products 50, which will be described later, arranged in a line with the axial direction up and down in a packaging bag 100 made of a film. A direction in which two roll products 50 are arranged is 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 sectional view 2, the packaging bag 100 is folded inward symmetrically with the left and right sides of the tubular (tubular) film as gussets 8, and the folding edges 8 a of the gussets 8 are in the longitudinal direction L of the packaging bag 100. (Refer to FIG. 1) It is formed in a flat shape so as to be close to each other in the vicinity of the center, and an appropriate portion of the folded portion is joined at the upper end by heat sealing or the like. The rectangular flat portion integrated and fixed by heat sealing in this way 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. Further, when the roll product is stored, the gusset of the main body portion 6 is developed, and the main body portion 6 forms a substantially rectangular parallelepiped with a rectangular cross section having four side surfaces 6a to 6d.

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

  In addition, a substantially oval slit-like finger hooking hole 2 having a non-cut-out portion upward is provided at substantially the center of the grip portion 4. Then, when the purchaser carries the roll product package 200, the slit of the finger hole 2 is cut out, and when the piece with the non-cutout portion as a fixed end is turned upward, the turn-up portion is bent into a U-shape, so that a sharp end surface is formed. Does not occur and fingers do not 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 can be employed, such as two finger hanging holes 2.

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

When the roll length of the roll product 6 is less than the above lower limit value, the roll length per roll is shortened, the roll replacement frequency is increased, and space saving during storage cannot be achieved. When the roll length of the roll product 6 exceeds the above upper limit value, the roll diameter (outer diameter of the roll) becomes too larger than that of the conventional roll product and is difficult to fit in a toilet paper holder or the like. The winding length is preferably 70 to 85 m, and more preferably 73 to 78 m.
When the mass of the roll product 6 excluding the core is less than the above lower limit value, the winding length per roll becomes short, the roll replacement frequency increases, and space saving during storage cannot be achieved. When the mass excluding the core of the roll product 6 exceeds the above upper limit value, the winding length is too long and the winding diameter (outer diameter of the roll) becomes too larger than that of 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 220 to 330 g, and more preferably 245 to 280 g.
In addition, the winding length per roll of normal 2ply toilet paper is about 25 m, and the mass is about 90 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 tactile sensation (softness) of the roll is inferior. When the roll hardness of the roll product 6 exceeds the above upper limit, when the roll is packaged with a film, the roll is crushed and looks bad.
The roll hardness of the roll product is preferably 1.1 to 2.5 mm, more preferably 1.3 to 2.2 mm.
In addition, winding hardness is measured as follows using a compression tester (a handy compression tester KES-G5 manufactured by Kato Tech Co., Ltd.). First, the roll product 6 is placed on a hard table so that its 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 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 pushed into the center of the acrylic plate under the condition of a speed of 0.01 cm / second. 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, it is possible to push in the entire width of the roll, and to evaluate the ease of crushing of the roll when wrapped with a film. 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 .
When the basis weight of the film is less than 18 g / m ² , the strength is reduced, and the packaging bag is torn when the package is transported. 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 is increased and the roll product is easily crushed or the film is stiff. The basis weight of the film is preferably 22 to 38 g / m ² , more preferably 27 to 34 g / m ² .
The material of the film is not limited, but a composition containing polyethylene that is not easily torn (easily stretched) is preferable. Moreover, the single side | surface of a film may be printed, the printing surface (printing layer) may be the outer surface (surface which a consumer touches with hand) side of a packaging bag 100, and is in contact with the inner surface (toilet roll etc. in the packaging bag 100). Surface) side. However, when the printed layer is positioned on the outer surface side of the packaging bag 100, when displaying the product of the roll product package, the printed layer may be damaged or peeled off due to rubbing or the like. It is preferable. If the film has a laminated (laminated) structure, both sides of the print layer are sandwiched between the films, and it is difficult to damage the print layer on either the inner or outer surface, but the cost increases.

  The long roll of toilet paper having the above-described winding length, mass, and winding hardness is heavier than one roll of normal toilet paper. 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 within 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 and 55 of the packaging bag 100 and the grip portion 4, and the long sides 45 and 55 of this part are contacted. ) 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 25 to 45 degrees, and the interval W between the long sides 45 and 55 is set. Is 105 to 134 mm. Thereby, since the load concerning the edge part of the roll product 50 which contact | connects the long sides 45 and 55 becomes small, it can make it hard to crush the roll product accommodated in the gusset type packaging bag.
Note that the inclination 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 with the grip portion 4 is 2F. This force 2F acts as half of the force F at the end of the roll product 50 that is in contact with the long sides 45 and 55, respectively. Since the force F acts as a component force of (F / sin θ) in each of the panel portions 41 and 51, (F / sin θ) decreases as θ increases, and the roll product 50 in contact with the long sides 45 and 55 decreases. The load on the end is reduced. Therefore, θ is specified to be 25 degrees or more.
From this point of view, it is preferable that θ is large. However, 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 and the stability is inferior, or the size of the packaging bag 100 is increased and the cost is increased because θ is excessively increased. Therefore, θ is defined to be 45 degrees or less.

Next, the reason why the roll products 50 are packaged in a row will be described with reference to FIG. FIG. 5 shows an embodiment in which roll products 50 are arranged in two rows and wrapped by gusset folding.
Also in FIG. 5, as in FIG. 4, (F / sin θ) decreases as θ increases, and the load applied to the end 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 interval between the long sides 45 and 55 is about twice (2 W) the interval W in the case of a single row, and the panel portions 41 and 51 and the roll product 50 are proportionally proportional thereto. Since the gap with the upper end is also doubled (2G), the roll product 50 is likely to move within 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 set to θ as shown by the chain line in FIG. As a result, the component force (F / sinφ) acting in the directions of the panel portions 41 and 51 is increased, and the roll product is easily crushed.

The interval W is measured as follows. First, as shown in FIG. 6, with the packaged state, the winding diameters DR1 and DR2 of each roll product 50 in the uppermost stage are measured with a ruler, and these values (total of two places) are averaged. , 55 is an interval W between them. Here, since the packaging bag 100 is in close contact with the outer periphery 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 is Are considered as 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 of the measurement location 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 removing the film. (However, in this case, when the following inclination angle θ is measured, 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 and PL2 of the panel part 41 and the lengths PL3 and PL4 of the panel part 51 are sequentially measured with a ruler while being lifted. Here, the “length of the panel portion” is the length (distance) from the long sides 45 and 55 to the grip portion 4. In addition, 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 varies 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 grip 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 in order to distinguish them from the line segments representing the winding diameters DR1 and DR2. However, in practice, several lengths to the grip portion 4 are measured centering on the positions where the winding diameters DR1 and DR2 are measured among the long sides 45 and 55, and the shortest distance is set as the length of the panel portion.

And four values of length PL1-PL4 of each panel part 41 and 51 are averaged, and let this be the length PL of a panel part. Next, the inclination angle θ is calculated from cos θ = (W ÷ 2) / PL.
The inclination angle θ described above is calculated separately for each of the five roll product packages 200, and an average value of these five values is adopted as the inclination angle θ.

The inclination angle θ is preferably 28 to 42 degrees, and more preferably 31 to 39 degrees. The interval W is preferably 108 to 125 mm, and more preferably 113 to 119 mm.
In addition, since it can be considered that the space | interval W is the same as the winding diameter of the roll product 50, it is preferable that a winding diameter is 105-134 mm, it is more preferable that it is 108-125 mm, and it is 113-119 mm. Most preferred.

In addition, the length of the grip portion 4 along the direction of 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, more preferably 82 of the winding diameter × 2. % Or more, and most preferably 87% or more of the winding diameter × 2. In addition, the upper limit of the length of the holding part 4 is winding diameter x2.
If the length of the gripping part 4 is less than 72% of the winding diameter × 2, both ends of the gripping part 4 along the long sides 45 and 55 are positioned on the inner side of the roll product 50. And the short side packaging bag 100 sandwiched between the long sides 45 and 55 has no length, and the short side packaging bag 100 is pulled. For this reason, the load concerning the edge part of the roll product 50 which touches a short side becomes large, and the roll product 50 accommodated 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 roll diameter of the roll product 50 is 117 mm, the outer peripheral length when the two roll products 50 are arranged in a row 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 gripping portion) is 215 mm, and the length of the gusset portion is 45 mm. × 2) 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 gripping portion) is shortened to 165 mm, and the length of the gusset portion is set to 70 mm. , (Winding diameter × 2) is 71% (= 165 mm ÷ 234 mm).

In particular, when the roll hardness of the roll product / the basis weight of the film is controlled, the roll product is more difficult 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 0.00. 040 to 0.10 (mm / (g / m ² )), most preferably 0.045 to 0.080 (mm / (g / m ² )).
When the winding hardness is constant, when the basis weight of the film is increased, the value of (winding hardness / film basis weight) decreases, which means that the strength with which the film clamps the roll increases. Conversely, when the value of (winding hardness / film basis weight) is large, it 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 winding hardness value is increased, the value of (winding hardness / film basis weight) is increased, which means that the roll is easily crushed. To do. Conversely, when the value of (rolling hardness / film basis weight) is small, it means that the strength of the film is weakened.
Therefore, by setting the value of (winding hardness / film basis weight) to an appropriate range, the roll product is further less likely to be crushed and the strength of the film can be made appropriate.

The basis weight per sheet of roll product is preferably more than 13 g / m ² and not more than 17 g / m ² , more preferably 13.5 to 16.5 g / m ² , most preferably 14.1 to 16.0 g. / M ² .
When the basis weight of the sheet is less than the above lower limit value, the strength is lowered and the feeling of use (bulkiness) may be lowered. When the basis weight of the sheet exceeds the above upper limit value, the sheet may feel hard and the feeling of use may be reduced, or when the sheet is rolled up for a long time, the winding diameter may increase, making it difficult to attach 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 sheet basis weight and paper thickness to the above ranges, the hygienic thin paper web calender conditions (paper thickness and specific volume after calendering) and embossing conditions (paper thickness and specific volume after embossing) The method of prescribing is mentioned.

As the sheet strength, DMDT (Dry Machine Direction Tensile strength) is defined as the longitudinal tensile strength during drying and DCDT (Dry Cross Direction Tensile strength) is defined as the transverse tensile strength during drying based on JIS P8113.
The DMDT of the sheet (2ply) 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 (2ply) 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 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 values, they become 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 “lateral direction”.

The specific volume of the sheet is preferably 4.0 to 6.5 cm ³ / g, more preferably 4.3 to 6.1 cm ³ / g, and most preferably 4.7 to 5.6 cm ³ / g.
When 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 moisture absorption ability. On the other hand, when the specific volume exceeds the above range, the bulk (bulkiness) becomes high, but the smoothness may be inferior or the tactile sensation may be deteriorated.

The film constituting 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 torn when the package is transported. 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, 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 perforation may be formed so as to extend in either the vertical direction or the horizontal direction of the roll product package, but is preferably formed in the vertical direction.

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

  A sheet of sanitary thin paper blended so that the content (mass%) of the pulp composition is NBKP 10%, LBKP 60%, and recycled paper pulp derived from milk packs is made, and the sheets are laminated and wound in 2 ply. A toilet roll product 50 having the characteristics shown was produced. On the other hand, a polyethylene film having physical properties shown in Table 1 was prepared as a packaging bag 100, and a roll product package 200 was obtained by packaging a toilet roll product in the form shown in FIG.

The following evaluation was performed.
1) Characteristics of sanitary thin paper sheet Longitudinal tensile strength DMDT during drying and lateral tensile strength DCDT during drying DCDT: Based on JIS P8113, the maximum load until breakage of sanitary thin paper of the number of products (2 ply) is N 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 a measurement load of 3.7 kPa and a probe diameter of 30 mm. A sample was placed between the probe and the measurement 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 expressed as a volume cm ³ per unit g.

2) Characteristics of roll products Roll length: measured. The measurement measured 10 rolls and averaged the measurement results.
Winding diameter: Measured using a diameter rule manufactured by Muratec KDS. The measurement measured the diameter in the axial center of a roll about ten rolls, and averaged the measurement result.
Mass of 1 roll excluding core: First, the mass of 1 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 the core) − (Mass of core) = (Mass of one roll excluding the core). The measurement measured 10 rolls and averaged the measurement results.
Winding hardness: measured as described above.
Tilt angle θ: measured as described above.

3) Film characteristics 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 using a measuring device (product name TM600) manufactured by Kumagai Riki Kogyo Co., Ltd., with a pressure of 50 kPa on the pressing surface.

The following sensory evaluation was performed by 20 monitors.
Resistance to crushing of toilet roll: The degree of crushing of the roll by a film was evaluated for the toilet roll after packaging.
Difficulty of crushing end of toilet roll: One minute after holding the grip part 4 of the roll product package 200, the degree of crushing of the roll contacting the film of the long sides 45 and 55 in FIG. 1 was evaluated.
Softness of toilet roll: For the toilet roll after packaging, the packaging film was removed, the toilet roll was held by hand, and the softness was evaluated.
Sheet use feeling: The use feeling 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 film tearing was evaluated.
Film feeling: After packaging the toilet roll, the package was touched by hand to evaluate the film feeling.
Wearability to paper holder: The toilet roll after packaging was evaluated by removing the packaging film and attaching the toilet roll to the paper holder.
Roll replacement frequency: The period until one toilet roll was used up was evaluated.
Retainability of toilet roll in packaging bag: It was visually evaluated whether the toilet roll in the packaging bag was stably held without moving.
The evaluation standard was a perfect score. 5 points: very good, 4 points: good, 3 points: no problem in practical use, 2 points: inferior, 1 point: notably inferior.
In addition, the measurement of the basis weight, tensile strength, paper thickness, specific volume, winding length, winding diameter, mass, winding hardness, inclination angle θ, and the basis weight, thickness, and density of the toilet paper is JIS-P8111. It was performed after maintaining the equilibrium state under the temperature and humidity conditions specified in (23 ± 1 ° C., 50 ± 2% RH).

  The obtained results are shown in Tables 1 and 2.

As apparent 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 winding hardness is 1.0 to 3.0 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 As a result, the frequency of roll replacement has decreased. Furthermore, even when the roll product package was used, the roll was hardly 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 the comparative example 1 whose basic weight of a film is less than 18 g / m < ² >, the intensity | strength of the film fell.
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 was less than 63 m, the roll replacement frequency increased.
In the case of Comparative Example 4 where the roll length of the roll product exceeded 103 m, the roll winding diameter exceeded 134 mm, so that the mounting property to the paper holder was poor.
In the case of the comparative example 5 whose winding hardness is less than 1.0 mm, it was inferior to the softness of the toilet roll.
In the case of Comparative Example 6 in which the winding hardness exceeded 3.0 mm, the roll was easily crushed. Moreover, in the case of the comparative example 6, since the roll diameter of the roll exceeded 134 mm, it was inferior to the mounting property to a 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 of the long sides 45 and 55 were crushed because the load related to the panel portions 41 and 51 was increased. Note that Comparative Example 7 is a product in which two roll products are arranged in two rows in both vertical and horizontal directions.
In the case of Comparative Example 9 in which the inclination angle θ of the packaging bag exceeded 45 degrees, the toilet roll moved within the packaging bag, resulting in poor stability.
In the commercial product 1, the winding length per roll was 25 m, and the frequency of roll replacement increased. Moreover, the value of winding hardness was high exceeding 3.0 mm, and the roll was easy to be crushed.

2 Finger hole 4 Gripping part 6 Body part 45,55 Long side of body part 50 Roll product 100 Packaging bag 200 Roll product package

Claims (3)

A roll product package comprising a plurality of roll products in which a 2 ply sheet of sanitary thin paper is wound in a packaging bag made of film,
The roll product is packaged in the packaging bag in two or three stages with two stages arranged in a line with the axial direction up and down,
The packaging bag is composed of a cylindrical gusset bag, and extends in a gable roof shape upward from a long side facing each other among a substantially rectangular parallelepiped main body portion surrounding the roll product and an upper side of the main body portion. A gripping part joined together,
Finger grip holes are formed in the grip portion,
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, and the winding hardness is 1.0 to 3.0 mm.
The basis weight of the film is 18 to 43 g / m ² ,
The inclination angle θ of the packaging bag from the long side to the grip portion is 25 to 45 degrees,
A roll product package in which an interval W between the long sides is 105 to 134 mm. The roll product package according to claim 1, wherein (the winding hardness (mm) / the basis weight (g / m ² ) of the film) is 0.033 to 0.11 (mm / (g / m ² )). The roll product package according to claim 1 or 2, wherein a basis weight per sheet is more than 13 g / m ² and not more than 17 g / m ² .

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