JP7574066B2 - Hand towel storage box - Google Patents

Description

The present invention relates to a storage box containing hand towels.

Paper hand towels are used in various forms, such as rolls and pop-up types inserted into storage boxes or storage films. Such paper hand towels are often used to dry hands after washing, or to wipe off moisture and dirt from objects, and are required to be able to be pulled out with one hand.

For example, in kitchens in the food and beverage industry and in public restrooms, hand towels are often placed in special dispensers made of metal or plastic. These special dispensers are generally designed so that hand towels can be easily removed with one hand.

On the other hand, in recent years, due to the growing awareness of hygiene, the use of disposable paper hand towels has increased even in ordinary households (for example, as a replacement for cloth towels for drying hands and for dish towels). For example, in the home, they are often used in the form in which they were purchased (for example, pop-up type inserted into a storage box or storage film, roll type, etc.) without installing a dedicated dispenser.

For example, Patent Document 1 discloses a film packaging body in which the packaged item is sanitary paper folded in a pop-up style, and paper hand towels or the like can be used as the sanitary paper.

JP 2016-188092 A

However, when hand towels are stored in a storage box, there is a problem in that the storage box is prone to lifting up or dropping back when the towels are pulled out. This problem can occur in both cases, whether the storage box has a film on the opening or not. Furthermore, hand towels are also required to have an excellent feel when in use.

The present invention was made in consideration of these circumstances, and aims to provide a storage box containing hand towels that does not lift up or drop back when pulled out and is comfortable to use.

As a result of intensive research into achieving the above-mentioned object, the inventors have discovered that a storage box containing hand towels is a storage box in which a hand towel laminate, in which paper hand towels are folded so that each towel overlaps another, is stored in the storage box, the hand towels are stored in a storage box having a height of 35 mm or more and 75 mm or less, the hand towels have a basis weight of 26.0 g/m2 or ^more and 34.0 g/m2 ^or less, a paper thickness of 0.85 mm/10 ply or more and 1.20 mm/10 ply or less, a D-value measured by a tissue softness measuring device (TSA device) of 1.2 mm/N or more and 2.4 mm/N or less, and the pull-out resistance of the hand towels from the storage box is 1.5 N or more and 2.8 N or less for the third set to the fifteenth set from the top, and 0.4 N or more and 1.5 N or less for the third set to the twentieth set from the bottom, and have completed the present invention based on this discovery.

In other words, the present invention is as follows.

(1)
A storage box containing hand towels, in which a hand towel stack formed by folding paper hand towels one on top of the other is stored in the storage box, the hand towels are stored in a storage box having a height of 35 mm or more and 75 mm or less, the hand towels have a basis weight of 26.0 g/m2 or ^more and 34.0 g/m2 ^or less, a paper thickness of 0.85 mm/10 plies or more and 1.20 mm/10 plies or less, a D value measured by a tissue softness measuring device (TSA device) of 1.2 mm/N or more and 2.4 mm/N or less, and the pull-out resistance of the hand towels from the storage box is 1.5 N or more and 2.8 N or less for the third set to the fifteenth set from the top and 0.4 N or more and 1.5 N or less for the third set to the twentieth set from the bottom.
(2)
The storage box containing hand towels according to (1), wherein the dry machine direction tensile strength (DMDT) of the hand towels is 20.6 N/25 mm or more and 30.4 N/25 mm or less.
(3)
The storage box containing hand towels according to (1) or (2), wherein the dry lateral tensile strength (DCDT) of the hand towels is 3.9 N/25 mm or more and 8.3 N/25 mm or less.
(4)
The storage box containing hand towels according to any one of (1) to (3), wherein the weight of the storage box is 20 g or more and 55 g or less.
(5)
The storage box containing hand towels according to any one of (1) to (4), wherein the direction in which the hand towels are pulled out from the storage box is the machine direction (MD) of the hand towels, and the coefficient of dynamic friction when the overlapping surfaces of two overlapping hand towels in the storage box are rubbed against each other in the MD direction is 0.10 or more and 0.24 or less.
(6)
The storage box containing hand towels according to any one of (1) to (4), wherein the hand towels are pulled out of the storage box in a cross direction (CD) of the hand towels, and the coefficient of dynamic friction between two overlapping hand towels in the storage box when the overlapping surfaces of the two hand towels are rubbed against each other in the CD direction is 0.12 or more and 0.26 or less.

The present invention provides a storage box containing hand towels that does not lift up or drop back when pulled out and is comfortable to use.

FIG. 1 is a perspective view of a storage box containing hand towels according to this embodiment. FIG. 2 is a perspective view showing the inside of the storage box containing hand towels according to this embodiment. FIG. 3 is a conceptual diagram for explaining a method for measuring the withdrawal resistance. FIG. 4 is a conceptual diagram for explaining a method for measuring the dynamic friction coefficient. FIG. 5 is a perspective view for explaining a method for measuring the upper space.

The following describes in detail the form for carrying out the present invention (hereinafter, simply referred to as the "present embodiment"). The following present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out with appropriate modifications within the scope of its gist.

In addition, in the drawings, the same elements are given the same reference numerals, and duplicate explanations are omitted. Furthermore, unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to the ratios shown in the drawings.

Furthermore, in this specification, any term with "abbreviation" indicates the meaning of the term excluding "abbreviation" within the scope of common technical knowledge of a person skilled in the art, and includes the meaning itself excluding "abbreviation."

＜Storage box with hand towels＞

Figure 1 is a perspective view of a storage box containing hand towels according to this embodiment, and Figure 2 is a perspective view showing the inside of the storage box containing hand towels according to this embodiment.

Storage box 1 containing hand towels according to this embodiment is a storage box 1 containing hand towels, in which hand towel laminate 10, in which paper hand towels 11 are folded so that they overlap one another, is stored in storage box 20. Hand towels 11 are stored in storage box 20 having a height of 35 mm to 75 mm, hand towels 11 have a basis weight of 26.0 g/ ^m2 to 34.0 g/ ^m2 , a paper thickness of 0.85 mm/10 plies to 1.20 mm/10 plies, a D value measured by a tissue softness measuring device (TSA device) of 1.2 mm/N to 2.4 mm/N, and the pull-out resistance of hand towels 11 from storage box 20 is 1.5 N to 2.8 N for the third to fifteenth sets from the top and 0.4 N to 1.5 N for the third to twentieth sets from the bottom.

The storage box 20 has a pull-out opening 21 on its top surface, from which the hand towel 11 can be pulled out. Specifically, the hand towel 11 can be pulled out from a slit 23 formed by a window film 22. Note that, although the storage box 20 will be described later, in this embodiment, the configuration of the pull-out opening 21 and the like is not particularly limited as long as the hand towel 11 can be pulled out. For example, the pull-out opening 21 may or may not be provided with a window film 22. The dimensions and shape of the slit 23 can also be appropriately determined taking into consideration the dimensions and shape of the hand towel 11, its purpose, etc.

After extensive research into the problem of hand towels stored in a storage box lifting up or dropping back when the hand towels are pulled out, the inventors concluded that this was due to the resistance to pulling out the hand towels. Further investigation into this resistance led them to conclude that friction at the pull-out opening and friction between adjacent hand towels that are folded so that they overlap in a pop-up type (friction between hand towels) were the factors that influenced this problem. However, even if this resistance to pulling out could be reduced, this would then result in a problem in which drop back could not be suppressed.

Furthermore, as the number of hand towels remaining in the storage box decreases (as the towels near the end of their life), the combined weight of the storage box and the remaining hand towels becomes lighter. Therefore, as the hand towels near the end of their life, the storage box tends to lift up when pulling them out, making it more likely that problems will occur such as the towels becoming difficult to pull out.

This problem is more pronounced with hand towels than with tissues and the like, and while it has been desirable to solve this problem in conventional storage boxes containing hand towels, conventional technology has been unable to do so. However, by satisfying the various conditions in this embodiment, it is possible to realize a storage box containing hand towels that can prevent both the storage box 20 from lifting up and dropping back, and that also feels good when in use.

The hand towel 11 and storage box 20 that constitute the hand towel storage box 1 according to this embodiment are described in detail below.

(Hand towel)

The hand towels 11 are folded one on top of the other, for example in a roughly V-shape, to form the hand towel laminate 10. That is, the number of plies is one. The hand towel laminate 10 is stored in a storage box 20 as shown in FIG. 1. In this embodiment, the longitudinal direction of the hand towel laminate 10 is the width W1 of the hand towel laminate 10, which is a direction parallel to the opening 21 of the storage box 20. The short side direction of the hand towel laminate 10 is a direction perpendicular to the longitudinal direction, which is the vertical width D1 of the hand towel laminate 10 (see FIG. 2).

The basis weight of the hand towel 11 is 26.0 g/m ² or more and 34.0 g/m ² or less, and preferably 28.0 g/m ² or more and 32.0 g/m ² or less. The basis weight can be measured in accordance with JIS P 8124.

The paper thickness of the hand towel 11 is 0.85 mm/10 plies or more and 1.20 mm/10 plies or less. Preferably, it is 0.90 mm/10 plies or more and 1.10 mm/10 plies or less. The paper thickness can be measured under the conditions of JIS P 8111 (23±1°C, 50±2% relative humidity) using a thickness gauge (for example, Ozaki Seisakusho's upright dial thickness gauge "PEACOCK R1-B type") with a pressure of 3.7 kPa applied to the gauge.

By keeping the basis weight and paper thickness within the above ranges, the paper feels appropriately soft and pleasant to the touch when used for wiping hands.

The D value of the hand towel 11 measured by a tissue softness measuring device (TSA device) is 1.2 mm/N or more and 2.4 mm/N or less. This D value is preferably 1.5 mm/N or more and 2.1 mm/N or less. This D value refers to the measured value of stiffness (D) expressed as the amount of deformation displacement in the vertical direction of the sample when a sample of the hand towel 11 placed on the sample stage of the TSA device is pressed from above with a pressing pressure of 100 mN and 600 mN, respectively, without rotating the bladed rotor.

By setting the D value within the above range, the hand towel 11 feels appropriately soft and pleasant to the touch when used for wiping hands. In addition, the hand towel 11 is less likely to tear when removed from the storage box 20, and both lifting up and dropping back of the storage box 20 when removed can be effectively prevented.

The pull-out resistance (resistance when pulling out the hand towels 11 from the storage box 20) of the third to fifteenth sets of hand towels 11 from the top of the storage box 20 is 1.5 N or more and 2.8 N or less. This resistance is preferably 1.8 N or more and 2.5 N or less.

In addition, the pull-out resistance (resistance when pulling out the hand towels 11 from the storage box 20) of the third to twentieth sets of hand towels 11 from the bottom stored in the storage box 20 is 0.4 N or more and 1.5 N or less. This resistance is preferably 0.6 N or more and 1.3 N or less.

The resistance to pulling out the hand towel 11 from the storage box 20 can be measured using the following method.

Figure 3 is a conceptual diagram to explain how to measure the withdrawal resistance.

First, prepare six storage boxes 1 containing hand towels, each of which has a hand towel laminate 10 stored in the storage box 20. From one box, take two pieces of paper 20a (12 mm in the MD direction, 20 mm in the CD direction) from the storage box 20. From one of the remaining five boxes, gently pull out and remove the first two pieces of hand towels 11.

Next, with the third set from the top, place the top edge of the hand towel 11 between the piece of paper 20a of the storage box 20 and the inner surface of the storage box 20, as shown in Figure 3, in the center of the sheet widthwise, with the inner surface of the storage box 20 touching the hand towel 11. A clip 30 (for example, a product name "TANOSEE double clip, small mouth width 19 mm" manufactured by Otsuka Shokai) is used to clamp the top of the piece of paper 20a of the storage box 20. The size of the clip 30 is 11 mm high and 19 mm wide, and the length of the piece of paper 20a of the storage box 20 is 12 mm and 20 mm wide. Note that the size of the clip 30 and the size of the piece of paper 20a are not limited to these.

Then, while the hand towels 11 are clamped in this manner, a Tensilon tensile tester is used to pull the hand towels 11 up at a pulling speed of 1000 mm/min, and the maximum resistance value applied when the hand towels 11 are pulled out of the storage box 20 is measured. Similarly, measurements are made for the fourth through fifteenth sets and the third through twentieth sets from the bottom, and the average value for each is taken as the pull-out resistance. Similar measurements are made for the remaining four boxes, and the average value for the five boxes is taken as the pull-out resistance.

Here, the pull-out resistance of the third to fifteenth sets from the top corresponds to the resistance at the beginning of use of the storage box 1 containing hand towels, and the pull-out resistance of the third to twentieth sets from the bottom corresponds to the resistance at the end of use of the storage box 1 containing hand towels. If the resistance at the beginning of use is high, the hand towels 11 are difficult to pull out, and may tear when pulled out. If the resistance at the end of use is high, the storage box 20 may lift up when the hand towels 11 are pulled out, while low resistance makes it easier for drop back to occur. In this regard, by controlling the resistance at the beginning of use and the resistance at the end of use as described above, the hand towels 11 can be easily pulled out without tearing when first using them, and both the lifting and drop back of the storage box 20 when pulled out, which are likely to occur at the end of use, can be effectively prevented.

It is preferable that the topmost sheet (the first set on the top) is folded along the sheet width. By folding the sheet, it is less likely to tear when pulling out the first set.

The dry longitudinal tensile strength (DMDT, dry longitudinal strength) of the hand towel 11 is preferably 20.6 N/25 mm or more and 30.4 N/25 mm or less, and more preferably 22.6 N/25 mm or more and 28.4 N/25 mm or less. By setting the dry longitudinal strength within the above range, the hand towel 11 feels appropriately soft when used for wiping hands, is less likely to tear when removed from the storage box 20, and effectively prevents both the lifting and drop back of the storage box 20 when removed.

The dry lateral tensile strength (DCDT, dry lateral strength) of the hand towel 11 is preferably 3.9 N/25 mm or more and 8.3 N/25 mm or less, and more preferably 4.9 N/25 mm or more and 7.4 N/25 mm or less. By setting the dry lateral strength within the above range, the hand towel 11 feels appropriately soft when used for wiping hands, is less likely to tear when removed from the storage box 20, and effectively prevents both the lifting and drop back of the storage box 20 when removed.

When the hand towels 11 are pulled out from the storage box 20 in the MD (machine direction) direction of the hand towels 11, the coefficient of dynamic friction (dynamic coefficient of dynamic friction in the MD direction) when the overlapping surfaces of two hand towels 11 overlapping in the storage box 20 are rubbed against each other in the MD direction is preferably 0.10 to 0.24, more preferably 0.13 to 0.20. The MD direction here refers to the flow direction of the hand towels 11 during production, which is the vertical direction of the hand towel laminate 10. The overlapping surfaces here refer to, for example, the surfaces that contact the felt of a papermaking machine. By setting the dynamic friction coefficient in the MD direction within the above range, the pull-out resistance value can be made more suitable, the hand towels 11 are more unlikely to break when taken out of the storage box 20, and both the lifting and drop-back of the storage box 20 when pulled out can be effectively prevented. In this case, the CD direction of the hand towels 11 coincides with the lateral direction of the hand towel laminate 10, so a suitable manufacturing method can be, for example, a method of processing the hand towels 11 using a rotary interfolder machine to obtain the hand towel laminate 10.

When the hand towels 11 are pulled out from the storage box 20 in the CD (Cross Direction) direction of the hand towels 11, the coefficient of dynamic friction (the coefficient of dynamic friction in the CD direction) when the overlapping surfaces of two hand towels 11 overlapping in the storage box 20 are rubbed against each other in the CD direction is preferably 0.12 to 0.26, more preferably 0.15 to 0.22. The CD direction here refers to the direction perpendicular to the flow direction during the manufacture of the paper wiper, but even in this case, the pull-out direction of the hand towels 11 is the vertical direction of the hand towel laminate 10. The overlapping surfaces here refer to, for example, the surfaces that contact the felt of the papermaking machine. By setting the coefficient of dynamic friction in the CD direction within the above range, the pull-out resistance value can be made more suitable, the hand towels 11 are more unlikely to break when taken out of the storage box 20, and both the lifting and the drop back of the storage box 20 when pulled out can be effectively prevented. In this case, the CD direction of the hand towels 11 coincides with the longitudinal direction of the hand towel laminate 10, so a suitable manufacturing method would be to use, for example, a multi-stand interfolder machine to process the hand towels 11 and obtain the hand towel laminate 10.

Here, we explain the relationship between the pull-out direction and the dynamic friction coefficient, etc.

First, in this embodiment, the pull-out direction of the hand towels 11 can be the MD direction of the hand towels 11 or the CD direction. In either case, the longitudinal direction of the hand towel laminate 10 is the width W of the hand towel laminate 10 and the storage box 20, and the transverse direction of the hand towel laminate 10 is the vertical width D of the hand towel laminate 10 and the storage box 20.

However, if the pull-out direction of the hand towel 11 is the MD direction of the hand towel 11, the MD direction of the hand towel 11 becomes the vertical direction of the hand towel laminate 10, which becomes the short side direction (vertical direction, see symbol D) in Figures 1 and 2. That is, in this case, it is preferable that the pull-out direction is the vertical direction and the dynamic friction coefficient in the MD direction is controlled to be within the above-mentioned range.

When the pull-out direction of the hand towel 11 is the CD direction of the hand towel 11, the CD direction of the hand towel 11 is the vertical direction of the hand towel laminate 10, which is the short side direction (vertical direction, see symbol D) in Figures 1 and 2. In this case, it is preferable that the pull-out direction is the horizontal direction and the dynamic friction coefficient in the CD direction is controlled to be within the above-mentioned range.

The above-mentioned dynamic friction coefficients in the CD and MD directions can be measured by the following method.

Figure 4 is a conceptual diagram to explain how to measure the dynamic friction coefficient.

The value of the dynamic friction coefficient was determined by measuring three times for one measurement (one sample) and using the third value. The samples were measured 10 times in the MD direction (vertical direction) and CD direction (horizontal direction) to obtain the average value. Here, with reference to FIG. 4, the measurement of the dynamic friction coefficient according to ISO 15359 will be described. First, one sample of the hand towel 11 is attached to the upper surface of the table 101 of the automatic friction tester 100, and the other sample is attached to the lower surface of the sled 102. When the table 101 is moved, the sample slips when the friction force of the sample contact surface reaches its limit with respect to the amount of movement of the table 101. During the movement of the table 101, the load cell 103 continues to measure the change in pressure from the sled 102, and the dynamic friction coefficient is derived based on this data. Note that when the sample is attached to the table 101, the fold of the sheet is included, but even if the measurement is performed with the fold included, the measurement value is not affected.

The material of the hand towel 11 contains pulp as a main component, and preferably contains 50% or more by mass of pulp. Examples of pulp include wood pulp, recycled paper pulp, and non-wood pulp. The hand towel 11 may be made of 100% wood pulp as pulp, or may contain recycled paper pulp and non-wood pulp in addition to wood pulp. The wood pulp is preferably softwood bleached kraft pulp (NBKP) or hardwood bleached kraft pulp (LBKP). The recycled paper pulp is preferably derived from paper liquid beverage containers such as milk cartons. In addition, the hand towel 11 may contain fillers, synthetic fibers, natural fibers, and the like as components other than pulp.

Specifically, the wood pulp preferably contains 20% to 50% by mass of softwood bleached kraft pulp (NBKP) and 50% to 80% by mass of hardwood bleached kraft pulp (LBKP), more preferably 25% to 45% by mass of NBKP and 55% to 75% by mass of LBKP, and even more preferably 30% to 40% by mass of NBKP and 60% to 70% by mass of LBKP.

In addition, up to about 50 parts by mass of recycled paper pulp may be included for every 100 parts by mass of wood pulp with the above pulp ratio. The quality of recycled paper pulp varies widely, and increasing the blend ratio significantly affects the quality of the product, especially the softness, so the blend amount relative to the wood pulp is preferably 30 parts by mass or less, more preferably 15 parts by mass or less, even more preferably 5 parts by mass or less, and even more preferably no recycled paper pulp is blended.

In order to ensure the appropriate strength of the hand towel 11, the raw materials can be mixed by normal means, and then the strength can be adjusted by beating the pulp fibers. For the beating process to obtain the target quality, the freeness (csf) of the seed box raw material is 350 mL to 650 mL, preferably 400 mL to 600 mL, and more preferably 450 mL to 550 mL. A dry strength enhancer may be used, and a wet strength enhancer is preferably used.

The vertical width of the hand towel 11 (the length in the short direction of the storage box 20, the direction in which it is pulled out) is preferably 200 mm or more and 240 mm or less, and more preferably 210 mm or more and 230 mm or less. This results in a sheet length that is suitable for the vertical width D of the storage box 20, and allows for good pull-out properties. This is also an ideal size for use in wiping hands.

The width of the hand towel 11 (the length in the longitudinal direction (sheet width) of the storage box 20, perpendicular to the pull-out direction, see symbol W1 in FIG. 2) is preferably 180 mm to 220 mm, and more preferably 190 mm to 210 mm. This sheet length is appropriate for the width W of the storage box 20, and allows for good pull-out properties. It is also an ideal size for use as a hand wipe. The dimensions of the hand towel 11 can be adapted to suit the dimensions and material of the storage box 20.

The height of the hand towel laminate 10 can be adjusted as needed by changing the number of hand towels 11 placed in the storage box 20, depending on the height H of the storage box 20. Specifically, the distance from the outlet 21 to the top of the hand towel laminate 10 (top space) is preferably 2 mm or more and 20 mm or less, and more preferably 5 mm or more and 15 mm or less.

By setting the headroom in the above range, it becomes easier to remove the hand towel 11 from the storage box 20 when first using it. The headroom can be measured as follows.

Figure 5 is a perspective view explaining how to measure the upper space.

As shown in FIG. 5, a 15 cm ruler 40a conforming to JIS B 7516 (e.g., a silver straight scale manufactured by Shinwa Sokutei Co., Ltd., made of stainless steel, 10 g) is placed at the center of the window film 22 so that it is perpendicular to the slit 23 in the window film. Then, a 15 cm ruler 40b conforming to JIS B 7516 (e.g., a silver straight scale manufactured by Shinwa Sokutei Co., Ltd., made of stainless steel, 10 g) is inserted along the slit 23 in the window film 22, and the length sunk by its own weight is measured. Similar measurements are made at both ends of the slit 23, and the average value of the three points is taken as the upper space.

(Storage box)

The storage box 20 is, for example, a roughly rectangular parallelepiped storage box made of paper, and is sometimes called a carton, etc.

The vertical width of the storage box 20 (see symbol D in FIG. 1) is preferably 100 mm or more and 120 mm or less, and more preferably 105 mm or more and 110 mm or less. Note that the vertical width of the storage box 20 is the outer dimension.

The width of the storage box 20 (see symbol W in FIG. 1) is preferably 205 mm or more and 245 mm or less, and more preferably 215 mm or more and 235 mm or less. Note that the width of the storage box 20 is the outer dimension.

The height of the storage box 20 (see symbol H in FIG. 1, sometimes called the carton height, etc.) is preferably 35 mm or more and 75 mm or less. If the height of the storage box 20 is higher than 75 mm, the pull-out resistance value is low, and even if the phenomenon of the storage box 20 being lifted can be suppressed to some extent, drop back is likely to occur. Also, if the height of the storage box 20 is less than 35 mm, even if drop back can be prevented to some extent, the pull-out resistance value is high, and the phenomenon of the storage box 20 being lifted is likely to occur. From this point of view, in order to more effectively prevent both the lifting and drop back of the storage box 20, this height is more preferably 40 mm or more and 70 mm or less. Note that this height of the storage box 20 is the outer dimension.

The length of the drawer opening 21 of the storage box 20 (the length of the slit 23 of the window film 22, see symbol W2 in FIG. 1) is preferably 140 mm or more and 160 mm or less. More preferably, it is 145 mm or more and 155 mm or less. In this embodiment, the drawer opening 21 of the storage box 20 may or may not be provided with a window film 22.

When no window film is provided, the longitudinal length of the drawer opening 21 of the storage box 20 is preferably 155 mm or more and 175 mm or less. This length is more preferably 160 mm or more and 170 mm or less. By setting the length of the drawer opening within the above range, the drawer resistance value falls within an appropriate range, and it is possible to effectively prevent both the lifting up and the drop back of the storage box 20 when the hand towel 11 is drawn out of the storage box 20.

The thickness of the window film 22 is preferably 30 μm or more and 70 μm or less. More preferably, this thickness is 40 μm or more and 60 μm or less. By setting the thickness of the window film 22 within the above range, the pull-out resistance value is within an appropriate range, which further improves the pull-out property of the hand towel 11 and effectively prevents both the lifting up and the drop back of the storage box 20 when the hand towel 11 is pulled out of the storage box 20.

The number of hand towels 11 stored in the storage box 20 (number of pairs) is preferably 50 pairs or more and 200 pairs or less. More preferably, it is 80 pairs or more and 180 pairs or less. The number of pairs can be appropriately determined taking into consideration, for example, the height of the storage box 20.

The weight of the storage box 20 is preferably 20 g or more and 55 g or less. This weight is more preferably 30 g or more and 45 g or less. By keeping the weight of the storage box 20 within the above range, the phenomenon of the storage box 20 lifting up when the hand towel 11 is pulled out of the storage box 20 can be effectively suppressed.

<Production Method>
The above-mentioned hand towels 11 can be obtained, for example, by making paper using a papermaking machine and then subjecting the paper to a calendaring process or the like as necessary. Embossing or the like may also be performed. Hand towels 11 can then be folded so that they overlap each other using a processing machine such as a multifolder (M/F) or an interfolder (I/F), and compressed as necessary, to obtain hand towel laminate 10. Hand towel laminate 10 thus obtained is stored and packaged in storage box 20 by a cartoner, packaging machine, or the like, to obtain storage box 1 containing hand towels.

The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples in any way.

<Example 1>

First, the materials shown in each table were used to carry out the process of manufacturing paper hand towels 11 using a papermaking machine, and rectangular paper hand towels 11 with the basis weight, paper thickness, strength, and dimensions shown in each table were produced. Next, the obtained hand towels 11 were laminated one by one by folding them alternately in a roughly V-shape, to obtain the hand towel laminate 10 (containing 120 hand towels) shown in Figure 2. The materials for the hand towels 11 were 35% by mass NBKP, 60% by mass LBKP, and 5% by mass recycled paper pulp.

(Making 1 storage box for hand towels)

The obtained hand towel laminate 10 (D1 = 99 mm, W1 = 220 mm) was placed in a paper storage box 20 (D = 108 mm, W = 225 mm, W2 of the opening 21 = 150 mm) shown in Figures 1 and 2 to produce a storage box 1 containing hand towels.

<Examples 2-6, Comparative Examples 1-4>

A hand towel, a hand towel laminate, and a storage box containing hand towels were produced in the same manner as in Example 1, except that the conditions were changed to those shown in Tables 1 and 2. For example, in Example 2, the pull-out direction of the hand towel 11 obtained in Example 1 was changed.

<Measurement of physical properties>

The various physical properties of each Example and Comparative Example were measured according to the following methods.

(grammage)
The basis weight of the hand towel 11 was measured in accordance with JIS P 8124.

(Paper thickness)
The thickness of the hand towel 11 was measured under the conditions of JIS P 8111 (23±1° C., 50±2% relative humidity) using a thickness gauge (Ozaki Seisakusho's upright dial thickness gauge "PEACOCK R1-B type") with a pressure of 3.7 kPa applied to the gauge.

(TSA D value)
The D value of the tissue softness measuring device (TSA device) for hand towel 11 was the measured value of stiffness (D), which is expressed as the amount of deformation displacement of the sample in the vertical direction between pressing pressures of 100 mN and 600 mN when a sample of hand towel 11 placed on the sample stage of the TSA device is pressed from above with a pressing pressure of 100 mN and 600 mN, respectively, without rotating the bladed rotor.

(Dry longitudinal strength (DMDT), dry transverse strength (DCDT))
The tensile strength in the machine direction when dry (dry machine direction strength, DMDT) and the tensile strength in the machine direction when dry (dry machine direction strength, DCDT) of the hand towel 11 were each measured based on the tensile test method of JIS P 8113.

(withdrawal resistance)
The "top" of the pull-out resistance of hand towels 11 is the pull-out resistance of the third to fifteenth sets of hand towels 11 from the top stored in storage box 20 (resistance when pulling hand towels 11 out of storage box 20). And the "bottom" of the pull-out resistance is the pull-out resistance of the third to twentieth sets of hand towels 11 from the bottom stored in storage box 20 (resistance when pulling hand towels 11 out of storage box 20). These pull-out resistances were measured in accordance with the measurement method described above, based on the pull-out resistance measurement method shown in Fig. 3. Then, as described below, the pull-out resistance was measured according to the conditions of each example and each comparative example.

When the pull-out direction was "vertical" (see Tables 1 and 2), the flow direction (MD direction; Machine Direction) of hand towel 11 during production was the vertical direction of hand towel 11, which was the short side direction (vertical direction) in Figures 1 and 2. The direction perpendicular to the flow direction of hand towel 11 during production (CD direction; Cross Direction) was the horizontal direction of hand towel 11, which was the longitudinal direction (horizontal direction) in Figures 1 and 2. In this case, hand towel 11 was pulled out in the vertical direction, and the dynamic friction coefficient of hand towel 11 in the MD direction was evaluated (see, for example, Examples 2, 5, and 6 and Comparative Examples 3 and 4 in Tables 1 and 2).
On the other hand, when the pull-out direction is "horizontal" (see Tables 1 and 2), the flow direction (MD direction; Machine Direction) of hand towel 11 during production is the horizontal direction of hand towel 11, which is the longitudinal direction (horizontal direction, see symbol W) in Figs. 1 and 2. The direction perpendicular to the flow direction during production of hand towel 11 (CD direction; Cross Direction) is the vertical direction of hand towel 11 (see symbol D), which is the short side direction (vertical direction) in Figs. 1 and 2. In this case, the pull-out direction of hand towel 11 is the horizontal direction of hand towel 11, which is the CD direction of hand towel 11 (see, for example, Examples 1, 3, and 4 and Comparative Examples 1 and 2 in Tables 1 and 2). In this case, the dynamic friction coefficient of hand towel 11 in the CD direction was evaluated.

(Kinematic Friction Coefficient)
As described below, the dynamic friction coefficient was measured according to the conditions of each Example and Comparative Example.
The dynamic friction coefficient “MD” refers to the case where hand towels 11 are pulled out of storage box 20 in the MD direction of hand towels 11, and is the dynamic friction coefficient when the overlapping surfaces of two hand towels 11 overlapping each other in storage box 20 are rubbed against each other in the MD direction (see, for example, Examples 2, 5, and 6, and Comparative Examples 3 and 4).
The dynamic friction coefficient “CD” refers to the case where hand towels 11 are pulled out of storage box 20 in the CD direction of hand towels 11, and is the dynamic friction coefficient when the overlapping surfaces of two hand towels 11 overlapping each other inside storage box 20 are rubbed against each other in the CD direction (see, for example, Examples 1, 3, and 4, and Comparative Examples 1 and 2).
These dynamic friction coefficients were measured based on the dynamic friction coefficient measuring method shown in FIG. 4 and in accordance with the measuring technique in accordance with ISO 15359 as described above.

(Carton height, carton weight)
The height of the carton (storage box 20) is the height (outside dimension) of the symbol H in Fig. 1. The weight of the carton is the weight of only the storage box 20 in Fig. 1 (weight not including the hand towel laminate 10).

Unless otherwise specified, measurements and evaluations in this example were performed after maintaining the sample in equilibrium under the temperature and humidity conditions specified in JIS P 8111 (23±1°C, 50±2% RH).

＜Evaluation＞

A sensory evaluation was conducted on the storage boxes containing hand towels from each Example and Comparative Example as follows.

(Carton lift evaluation)
Carton lifting: The frequency of occurrence of the phenomenon in which the carton (storage box) is lifted together with the hand towel when it is pulled out was evaluated based on the following criteria.
・“◎”: Even when there were only a few hand towels left, the carton was never lifted and the whole lot was used up (excellent).
· "◯": The occurrence of the carton lifting up occurred twice or less per carton, and the carton could be used without any problems (good).
· "X": The carton lifting phenomenon occurred three or more times per carton, making it difficult to use (unacceptable).

(Drop-back evaluation)
The frequency of drop back when pulling out the hand towel was evaluated based on the following criteria.
・“◎”: Even when the number of hand towels remaining was low, the player was able to use them all up without a single drop back (Excellent).
"Good": The number of dropbacks per carton was two or less, and the product could be used without any problems (good).
· "X": Drop back occurred three or more times per carton, making it difficult to use (unacceptable).

(Evaluation of Usability)
The evaluation of the usability was carried out by 60 people. First, each person rated the usability on a scale of 1 to 5 based on the following criteria.
4 or more and 5 or less points: When used for wiping hands, the material felt soft and had a particularly good feel to the touch, allowing hands to be wiped smoothly.
- 3 or more and less than 4 points: When used for wiping hands, the material felt soft and pleasant to the touch, and there was no problem in wiping hands.
Less than 3 points: When used for wiping hands, it did not feel soft, had a bad feel to the touch, and was uncomfortable to wipe hands with.
The arithmetic mean of the scores given by the 60 people was then calculated and rated as "Excellent", "Good", or "Poor" based on the following criteria.
・"◎": Average score is 4.0 or above (Excellent)
・"〇": Average score is between 3.0 and 4.0 points (good)
・"X": Average score is less than 3.0 points (failed)

The conditions and evaluation results for each example and comparative example are shown in Tables 1 and 2.

From the above, it was confirmed that the hand towel storage box of this embodiment does not lift up or drop back when pulled out, and is comfortable to use.

1: Storage box for hand towels,
10: Hand towel laminate,
11: Hand towels,
20: storage box,
20a: Piece of paper from a storage box;
21: Drawer opening,
22: Window film,
23: slit,
30: Clip,
40a, 40b: ruler,
100: Automatic friction testing device,
101: table,
102: Thread,
103: load cell,
D: Vertical width of storage box,
D1: Vertical width of the hand towel laminate,
W: Width of the storage box,
W1: Width of the hand towel laminate,
W2: Length of the outlet,
H: Height of storage box

Claims (5)

A storage box containing hand towels, the storage box containing a stack of paper hand towels folded so that each paper hand towel overlaps the other,
The hand towel is stored in a storage box having a height of 35 mm or more and 75 mm or less,
The hand towel has a basis weight of 26.0 g/ ^m2 or more and 34.0 g/ ^m2 or less, a paper thickness of 0.85 mm/10 plies or more and 1.20 mm/10 plies or less, and a D value measured by a tissue softness measuring device (TSA device) of 1.2 mm/N or more and 2.4 mm/N or less,
The resistance to pulling out the hand towels from the storage box is 1.5 N or more and 2.8 N or less for the third set from the top to the fifteenth set, and 0.4 N or more and 1.5 N or less for the third set from the bottom to the twentieth set ,
the direction in which the hand towel is pulled out from the storage box is a machine direction (MD) of the hand towel;
When two of the hand towels overlap each other in the storage box, the coefficient of dynamic friction when the overlapping surfaces are rubbed against each other in the MD direction is 0.10 or more and 0.24 or less .
Storage box with hand towels. A storage box containing hand towels, the storage box containing a stack of paper hand towels folded so that each paper hand towel overlaps the other,
The hand towel is stored in a storage box having a height of 35 mm or more and 75 mm or less,
The hand towel has a basis weight of 26.0 g/m ² 34.0 g/m or more ² The paper thickness is 0.85 mm/10 plies or more and 1.20 mm/10 plies or less, and the D value measured by a tissue softness measuring device (TSA device) is 1.2 mm/N or more and 2.4 mm/N or less,
The resistance to pulling out the hand towels from the storage box is 1.5 N or more and 2.8 N or less for the third set from the top to the fifteenth set, and 0.4 N or more and 1.5 N or less for the third set from the bottom to the twentieth set,
The direction in which the hand towel is pulled out from the storage box is a cross direction (CD) direction of the hand towel,
When two of the hand towels overlap each other in the storage box, the coefficient of dynamic friction when the overlapping surfaces are rubbed against each other in the CD direction is 0.12 or more and 0.26 or less.
Storage box with hand towels. The dry machine direction tensile strength (DMDT) of the hand towel is 20.6 N/25 mm or more and 30.4 N/25 mm or less;
3. A storage box containing the hand towel according to claim 1 or 2 . The dry cross tensile strength (DCDT) of the hand towel is 3.9 N/25 mm or more and 8.3 N/25 mm or less.
A storage box containing the hand towel according to any one of claims 1 to 3 . The weight of the storage box is 20 g or more and 55 g or less.
A storage box containing the hand towel according to any one of claims 1 to 4 .