JP2024128443A - Wet tissue products - Google Patents

Abstract

To provide a wet tissue product that has a large capacity with a sheet hardly getting dried or the sheet hardly getting clogged at a take-out port in general irrespective of the number of remaining sheets in a storage container.SOLUTION: A wet tissue product comprises: a wet tissue roll body made of a nonwoven fabric sheet, which is wound and impregnated with a chemical liquid; a container body for storing the roll body; and a lid body detachably attached so as to close an opening of the container body. Therein: the sheet is provided with perforations in a width direction at substantially equal intervals in the flow direction; a ratio of a sheet length as a length between the perforations of the sheet to a peripheral length of the roll body is 80% or more and 135% or less; an impregnation magnitude of the chemical liquid is 200% or more and 350% or less; the number of the sheets contained in the roll body is 50 or more and 130 or less; and a weight loss rate after a lapse of 7 days in an environment at 50°C is 20% or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wet tissue product in which a nonwoven sheet is impregnated with a medicinal liquid.

Wet tissues are used to wipe hands and clean desks, and need to be just the right amount of softness for wiping hands and just the right amount of strength for wiping objects.

Wet tissues come in a variety of shapes, including bottle-type wet tissues, which are made by wrapping a sheet into a roll with perforations inserted into it and sealing it in a plastic bottle and cap (sometimes with a removal plug made of elastomer or the like).

Bottle-type wet tissues are made by rolling up the sheets into a roll, making them a compact, large-capacity product. Another advantage is that the wet tissues in the bottle are not exposed to the outside air, and only come into contact with it once they are taken out, so they don't dry out easily.

With these bottle-type wet tissues, you take a sheet from the center of the roll, insert it into the opening of the bottle, and pull it out to use.

For example, Patent Document 1, which is a document relating to a wet tissue storage container, discloses a wet tissue storage container that includes a container body that stores a roll of wet tissues with perforations formed at predetermined intervals in the longitudinal direction of the sheet body, and a lid that is attached to the upper surface of the container body and fitted into the container body, in which the lid includes a removal section located on the upper surface of the lid, a small lid that is attached to the upper surface of the lid via a hinge so as to be able to open and close the removal section, a through hole on the lower surface of the removal section, and a plug made of a rubber-like elastic material that is attached to the through hole and has an engagement hole for engaging with the wet tissue, and the removal section is inclined with respect to the upper surface of the lid.

As a document on the removal opening of a wet tissue storage container, Patent Document 2 discloses a packing for easy attachment/detachment and tear-off wet tissues, which is an elliptical disk having rubber elasticity and has an elliptical removal hole similar to the shape of the outer periphery at the center, a slit-shaped notch of a predetermined width that connects to the removal hole, reaches the outer periphery, and extends from the top to the bottom on one side of the short axis of the elliptical removal hole, and a recessed notch that connects to the removal hole and extends from the top to the bottom, facing the slit-shaped notch, is provided on the other side of the short axis of the elliptical removal hole, and gradually becomes thinner from the periphery of the bottom to the upper center, with a predetermined thickness in the center, and when the packing is attached to the removal opening of the lid, the slit-shaped notch and the recessed notch are crushed to eliminate any gaps, and the elliptical removal opening shrinks in diameter to become a circular removal opening.

JP 2016-216116 A JP 2008-074457 A

Bottle-type wet tissues are produced by winding up a sheet in a dry state with perforations inserted at specified intervals into a roll, and then sealing the wet roll body impregnated with a medicinal solution in a container.
For this reason, compared to products in which each sheet is impregnated with the chemical solution and then laminated, the chemical solution is less likely to diffuse into the sheets, so the impregnation rate of the chemical solution (the ratio of the weight of the chemical solution to the weight of the nonwoven fabric) needs to be high to prevent bacteria and mold.

However, when the impregnation ratio is high, when the number of sheets remaining in the bottle becomes low, the roll can no longer stand on its own, and the sheets become tangled or stick to each other, causing the sheets to lift up in that state and clog the removal port.

On the other hand, if the impregnation rate is low, there are concerns about mold and bacteria growth, and the sheet drying out between opening and use.

As such, it has been difficult for bottle-type wet tissue products to satisfy all of the following requirements: capacity, difficulty in drying, and ease of removal when only a few sheets are left.

The present invention was made in consideration of these circumstances, and aims to provide a wet tissue product that has a large capacity, the sheets do not dry out easily, and generally does not clog the outlet regardless of the number of sheets remaining in the storage container.

The inventors conducted extensive research and found that a wet tissue product including a wet tissue roll formed by winding up a nonwoven sheet and impregnating it with a medicinal solution, a container body having an opening at the top end and housing the roll body, and a lid body that can be attached detachably to close the opening of the container body, is perforated in the width direction at approximately equal intervals in the sheet flow direction, and the ratio of the sheet length to the circumference of the roll body, the impregnation rate of the medicinal solution of the sheet, the number of sheets contained in the roll body, and the weight loss rate of the sheet after 7 days in an environment at 50°C are all set within predetermined numerical ranges, resulting in a wet tissue product with a large capacity, in which the sheets do not dry out easily, and which generally does not clog the removal opening regardless of the number of sheets remaining in the storage container, and thus completing the present invention. That is, the present invention provides the following.

(1) The first aspect of the present invention is a wet tissue product including a roll of wet tissues made by winding up a sheet of nonwoven fabric and impregnating it with a medicinal solution, a container body having an opening at the upper end and housing the roll body, and a lid body that can be attached detachably to close the opening of the container body, wherein the sheet is perforated in the width direction at approximately equal intervals in the flow direction, the ratio of the sheet length, which is the length between the perforations of the sheet, to the circumference of the roll body is 80% or more and 135% or less, the impregnation rate of the medicinal solution in the sheet is 200% or more and 350% or less, the number of sheets included in the roll body is 50 sheets or more and 130 sheets or less, and the weight loss rate of the sheet after 7 days in an environment of 50°C is 20% or less.

(2) A second aspect of the present invention is the wet tissue product described in (1), characterized in that the content of wood raw materials contained in the sheet is 30% or more and 80% or less.

(3) The third aspect of the present invention is the wet tissue product described in (1), characterized in that when the medicinal solution impregnated in the sheet is squeezed, the alcohol concentration of the squeezed liquid is 5% by weight or more and 70% by weight or less.

(4) A fourth aspect of the present invention is the wet tissue product according to (1), characterized in that the basis weight of the sheet in an absolute dry state is 40 g/ ^m2 or more and 65 g/ ^m2 or less.

(5) The fifth aspect of the present invention is the wet tissue product described in (1), characterized in that the uniformity of impregnation of the medicinal liquid in the sheet (the relative standard deviation of the impregnation rate for each sheet) is 20% or less.

(6) A sixth aspect of the present invention is the wet tissue product according to (1), characterized in that the thickness _T0 of the sheet when a load of 0.5 gf/ ^cm2 is applied to the sheet using a KES compression tester is 500 μm or more and 950 μm or less.

The present invention provides a wet tissue product that is large-capacity, has sheets that do not dry out easily, and generally does not clog the outlet regardless of the number of sheets remaining in the storage container.

1 is a perspective view showing an entire wet tissue product according to an embodiment of the present invention. FIG. 1 is a perspective view showing an entire wet tissue roll body according to an embodiment of the present invention.

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.

<Wet tissue storage container>
As shown in Figures 1 and 2 , a wet tissue product 1 according to one embodiment of the present invention includes a wet tissue roll body 10 (hereinafter also referred to as simply the roll body 10) in which a nonwoven fabric sheet 10x (hereinafter also referred to as wet tissue 10x) is rolled up and impregnated with a medicinal solution, and a wet tissue storage container 20 (hereinafter also referred to as simply the storage container 20) which has an opening at an upper end and includes a container body 21 for storing the roll body 10, and a lid body 22 which is removably attached so as to close the opening of the container body 21.

(Container body)
The shape of the container body 21 of the wet tissue storage container 20 is not particularly limited as long as it is large enough to store the roll body 10. However, from the viewpoint of ease of portability, it is preferable that the container body 21 has a constricted portion in the center in the height direction, as shown in FIG. 1, in which the diameter continuously decreases from both the upper end and the lower end (a so-called waist-shaped shape).

(Lid)
The material and shape of the removal opening in the lid body 22 of the storage container 20 are not limited, but for example, as shown in Figure 1, it may be equipped with a through hole 221, an introduction hole 222 provided in the vicinity of the through hole 221, an induction path 223 connecting the through hole 221 and the introduction hole 222, and a small lid 224 that covers the through hole 221, the introduction hole 222, and the induction path 223 in a manner that allows it to be opened and closed freely.
Moreover, the lid 22 is preferably provided with an inner plug 226 made of an elastomer, which is attached to close the through hole 221 and has a pull-out hole 225 for pulling out the sheet 10x. By providing the inner plug 226, it becomes easier to cut the perforations 10c of the sheet 10x, which will be described later, when removing the sheet 10x, and the removal property is easily optimized.

<Wet tissues>
(Roll body)
As shown in FIG. 2, a wet tissue roll 10 according to one embodiment of the present invention is formed by rolling up a nonwoven fabric sheet 10x and impregnating it with a chemical solution.
2, the surface of the sheet 10x facing the outside of the roll is referred to as the surface 10a (the surface of the sheet 10x), and the surface facing the center of the roll is referred to as the back surface 10b (the back surface of the sheet 10x). Also, the end of the sheet 10x is referred to as the outermost edge 10e of the roll body 10.

The sheet 10x has perforations 10c in the width direction at approximately equal intervals in the machine direction, and each space between the perforations 10c constitutes one sheet 10x. The sheet 10x is preferably one ply or two plies, and more preferably one ply.
The sheet length of one sheet 10x has a lower limit of preferably 150 mm or more, more preferably 180 mm or more, and even more preferably 200 mm or more, and an upper limit of preferably 300 mm or less, more preferably 280 mm or less, and even more preferably 260 mm or less.
The sheet width of one sheet 10x is not particularly limited, but the lower limit is preferably 100 mm or more, more preferably 120 mm or more, and even more preferably 130 mm or more, and the upper limit is preferably 180 mm or less, more preferably 160 mm or less, and even more preferably 150 mm or less.

Furthermore, the lower limit of the circumference of the wet tissue roll body 10 is preferably 110 mm or more, more preferably 150 mm or more, and even more preferably 200 mm or more. The upper limit is preferably 375 mm or less, more preferably 340 mm or less, and even more preferably 300 mm or less.

The ratio of the sheet length of the sheets 10x to the circumferential length of the roll 10 is 80% or more and 135% or less. If the ratio is less than 80%, the sheets 10x tend to become entangled with each other, causing clogging at the take-out opening. If the ratio exceeds 135%, the number of sheets 10x in the roll 10 becomes small, and the wet tissue product 1 cannot be said to have a large capacity.
The ratio of the sheet length of the sheet 10x to the circumferential length of the roll body 10 is preferably 85% or more and 125% or less, and more preferably 90% or more and 120% or less.

The peripheral length of the roll body 10 is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. Ten roll bodies 10 are measured, and the measurement results are averaged to calculate the peripheral length.
The sheet length of the sheet 10x is measured using a 30 cm ruler conforming to the JIS standard (e.g., a silver ruler made of stainless steel and manufactured by Shinwa Sokutei Co., Ltd.) for five sheets from the end of one roll 10. Then, measurements are made for ten rolls 10, and the measurement results are averaged to calculate the length.

The lower limit of the height of the roll body 10 is preferably 100 mm or more, more preferably 120 mm or more, and even more preferably 130 mm or more, and the upper limit is preferably 180 mm or less, more preferably 160 mm or less, and even more preferably 150 mm or less.
If the height of the roll 10 is less than 100 mm, the number of sheets 10x used at one time will be large, and the roll 10 will not be considered to have a large capacity. If the height of the roll 10 exceeds 180 mm, when the number of sheets 10x remaining in the storage container 20 becomes small, the sheets 10x in the roll 10 that can no longer stand on their own will become tangled or stick to each other, and will rise up in that state, easily clogging the removal opening.
The height of the roll body 10 is calculated by placing a 30 cm ruler conforming to the JIS standard (for example, a silver ruler made by Shinwa Sokutei Co., Ltd., made of stainless steel) on the top surface of the roll body 10, measuring the distance from the ground at four points in the circumferential direction, and averaging the results. If the top surface of the roll body 10 is not horizontal, the highest point is measured. Then, measurements are taken for 10 roll bodies 10, and the measurement results are averaged to calculate the height.

The perforation 10c is formed of a cut portion and a non-cut portion, and the length of the cut portion has a lower limit of preferably 8 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. The upper limit is preferably 25 mm or less, more preferably 22 mm or less, and even more preferably 20 mm or less. The length of the non-cut portion has a lower limit of preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. The upper limit is preferably 0.8 mm or less, more preferably 0.6 mm or less, and even more preferably 0.4 mm or less.
In addition, in the perforation 10c, the lower limit of the bond rate (length of the non-cut portion ÷ (length of the cut portion + length of the non-cut portion)) is preferably 1% or more, more preferably 1.3% or more, and even more preferably 1.5% or more. In addition, the upper limit is preferably 3% or less, more preferably 2.5% or less, and even more preferably 2.3% or less.
The number of non-cut portions per sheet 10x (perforation 10c) is preferably 5 or more, more preferably 6 or more, and even more preferably 7 or more, and the upper limit is preferably 15 or less, more preferably 13 or less, and even more preferably 11 or less.

(Sheet material)
The nonwoven fabric used for the sheet 10x may be a mixture of ordinary synthetic fibers and a pulp fiber web, or may be a layer of a pulp fiber web on synthetic fibers and then integrated by hydroentangling.
The synthetic fibers preferably include one or more types of synthetic fibers selected from the group consisting of nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, and polystyrene.

The pulp fiber may be a general pulp fiber (wood pulp) such as softwood bleached kraft pulp (NBKP) or hardwood bleached kraft pulp (LBKP). Among them, it is preferable to include softwood bleached kraft pulp (NBKP) and hardwood bleached kraft pulp (LBKP). The content ratio of NBKP and LBKP in the pulp fiber is preferably 50:50 or more and 100:0 or less, more preferably 70:30 or more and 100:0 or less, even more preferably 90:10 or more and 100:0 or less, and most preferably 100:0.
As the NBKP, for example, fibers made of radiata pine, slash pine, southern pine, lodgepole pine, spruce and Douglas fir are preferred. Note that NUKP can be used instead of NBKP, and LUKP can be used instead of LBKP.
In addition, other fibers such as rayon, lyocell, cotton, etc., which are used in paper products, can be used without any particular restrictions.

In this case, the content of the wood raw material contained in the sheet 10x is preferably 30% or more and 80% or less. If the content is less than 30%, the chemical solution is likely to evaporate, and one sheet 10x will dry out before it is used up. If the content exceeds 80%, the sheets 10x will tend to stick together, causing clogging of the outlet.
The content of the wood raw material contained in the sheet 10x is more preferably 35% or more and 75% or less, and further preferably 45% or more and 65% or less.

In the above content ratio, the wood raw material contained in the sheet 10x refers to, for example, rayon, lyocell, cotton, pulp, etc.
The content of wood raw material contained in the sheet 10x is measured according to "JIS L 1030-2 Test method for mixture ratio of textile products".

(Sheet properties)
The basis weight of the sheet 10x in an absolute dry state is preferably 40 g/m2 or ^more and 65 g/ ^m2 or less. If the basis weight is less than 40 g/ ^m2 , the sheets 10x tend to stick to each other, causing clogging of the take-out port. If the basis weight is more than 65 g/ ^m2 , the sheets 10x become bulky and the number of sheets 10x contained in the roll body 10 decreases, making it impossible to say that the roll body 10 has a large capacity.
The basis weight of the sheet 10x in an absolute dry state is more preferably 45 g/m ² or more and 60 g/m ² or less, and further preferably 50 g/m ² or more and 55 g/m ² or less.
The basis weight of the sheet 10x in an absolute dry state is measured in accordance with JIS P 8124.

It is preferable that the thickness _T0 of the sheet 10x is 500 μm or more and 950 μm or less when a load of 0.5 gf/ ^cm2 is applied to the sheet 10x by a KES compression tester. If _T0 is less than 500 μm, the sheets 10x tend to stick to each other, causing clogging at the take-out port. If _T0 exceeds 950 μm, the sheet 10x becomes bulky and the number of sheets 10x contained in the roll body 10 decreases, making it impossible to say that the roll body 10 has a large capacity.
Incidentally, T ₀ is more preferably 550 μm or more and 850 μm or less, and further preferably 600 μm or more and 800 μm or less.

The thickness T ₀ of the sheet 10x is measured using a KES-G5 compression tester (manufactured by Kato Tech Co., Ltd.).
A sample of the sheet 10x impregnated with the drug solution cut to a size of 140 mm x 200 mm is placed between a pressure plate and a pressure plate of ² cm2, and the pressure plate is lowered at a speed of 0.0020 cm/sec, and the pressure that changes at that time and the thickness of the sample are measured. When the sheet length and/or sheet width of the sheet 10x are less than the size of 140 mm x 200 mm, the corresponding sheet length and/or sheet width are not cut and are used as the sample as they are. At this time, the thickness T ₀ is the thickness (μm) of the sample at a pressure of 0.5 gf/cm ^2. The value of the thickness T ₀ is a value calculated as the average value of 10 measurements.
The thickness T ₀ of the sheet 10x can be adjusted by known methods such as the pressure for hydroentangling the nonwoven fabric, the wire pattern, and the composition, which will be described later.

(Chemical solution)
The liquid medicine to be impregnated into the sheet 10x may contain alcohol, a moisturizer, a preservative, an antibacterial agent, a stabilizer, and the like, which are generally used in wet tissues.
At this time, the impregnation ratio of the chemical solution into the sheet 10x is 200% or more and 350% or less. If the impregnation ratio is less than 200%, the chemical solution tends to evaporate and dry out before one sheet 10x is used up. If the impregnation ratio exceeds 350%, the sheets 10x tend to stick to each other, causing clogging of the dispensing port.

The impregnation rate is preferably 220% or more and 330% or less, and more preferably 250% or more and 310% or less.
The method of measuring the impregnation ratio is to first measure the area and weight of the sheet 10x, then wash the sheet 10x with an alcohol solution and dry it. After drying, the sheet 10x is conditioned at 23° C. and 50% RH, and the weight of the sheet 10x is measured. The weight of the chemical solution impregnated in 1 g of the sheet 10x is calculated as a percentage, and this is taken as the impregnation ratio.

The uniformity of the impregnation of the chemical solution in the sheet 10x (the relative standard deviation of the impregnation ratio for each sheet) is preferably 20% or less. If the uniformity exceeds 20%, mold or bacteria may grow on the surface of the sheet 10x. The uniformity of the impregnation of the chemical solution is more preferably 18% or less, and even more preferably 15% or less.

The uniformity of the impregnation of the sheet 10x with the chemical solution can be found by calculating the relative standard deviation of the impregnation rate for each sheet 10x.
The uniformity of the impregnation of the sheet 10x with the chemical solution can be adjusted by optimizing the dimensions of the roll body 10 and the storage container 20, or by the method of filling the impregnating liquid (number of times, flow rate, nozzle shape, impregnation ratio, etc.).

Furthermore, when the impregnated medicinal liquid is squeezed out of the sheet 10x, it is preferable that the alcohol concentration of the squeezed liquid is 5% by weight or more and 70% by weight or less. If the alcohol concentration is less than 5% by weight, the sheets 10x tend to stick together, causing clogging of the removal port. If the alcohol concentration exceeds 70% by weight, the medicinal liquid evaporates and dries up before one sheet 10x is used up.

The alcohol concentration of the squeezed liquid is more preferably 10% by weight or more and 60% by weight or less, and even more preferably 15% by weight or more and 50% by weight or less.
The alcohol concentration of the squeezed liquid is measured by squeezing the sheet 10x (wet tissue 10x) impregnated with the drug solution. The alcohol concentration can be measured by a known method (e.g., the alcohol number measurement method of the Japanese Pharmacopoeia: Method 2 gas chromatography, etc.).

The weight loss rate of the sheet 10x after 7 days in an environment of 50° C. is 20% or less. If the weight loss rate exceeds 20%, the chemical solution evaporates and dries up before one sheet 10x is used up.
The weight loss rate is preferably 15% or less, and more preferably 10% or less.

The weight loss rate is measured as follows.
First, the first sheet 10x is partially pulled out from the container 20 and set at the outlet, and its weight is measured. Next, the sheet is placed in a blower dryer (e.g., DKN912 manufactured by Yamato Scientific Co., Ltd.) at a set temperature of 50° C., left to stand for 7 days (168 hours), and then its weight is measured again. After that, the sheet is completely dried until the weight fluctuation is 0.1 g or less, and the amount of impregnated liquid is calculated.
The loss on drying (%) is calculated as follows: weight before drying (g) - weight after drying (g) / amount of impregnation solution (g) x 100. The above test is carried out on five samples, and the average of the measured values is calculated as the final weight loss rate.

(Wet tissue product manufacturing method)
The wet tissue product 1 according to this embodiment can be manufactured by the same process as that for ordinary wet tissue products, etc. Specifically, the wet tissue roll body 10 can be manufactured by the following processes: (1) manufacturing a nonwoven fabric, (2) slitting and perforation, and (3) roll winding and chemical impregnation. In this case, the timing of the chemical impregnation is preferably after the roll winding.
Regarding (1) production of a nonwoven fabric, the steps are not particularly limited as long as it is a general method for producing a nonwoven fabric, but it is preferable that the method mainly includes steps such as (1-1) producing a web, (1-2) three-dimensionally entangling fibers, and (1-3) removing moisture (drying) and melting the heat-fusible binder fibers by heat treatment.

In addition, when the sheet 10x is integrated by the above-mentioned hydroentanglement, a conventionally known hydroentanglement technique for synthetic fibers and pulp fiber webs may be used, and such a technique is described in detail, for example, in Japanese Patent No. 6,758,116.
Thereafter, the wet tissue roll 10 is stored in the container body 21 and the lid 22 is closed to complete the wet tissue product 1.

Furthermore, the number of sheets 10x contained in the roll 10 (i.e., the number of sheets 10x contained in the storage container 20 in the wet tissue product 1) is between 50 and 130. If the number is less than 50, the wet tissue product 1 cannot be said to have a large capacity. If the number exceeds 130, the roll becomes tightly wound, and the sheets 10x tend to stick together, causing clogging at the dispensing opening.
The number of sheets 10x included in the roll 10 is preferably 55 or more and 120 or less, and more preferably 60 or more and 100 or less.

As described above, this embodiment can provide a large-capacity wet tissue product in which the sheets do not dry out easily and the sheets generally do not clog the outlet regardless of the number of sheets remaining in the storage container.

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

Under the conditions shown in Tables 1 to 3, wet tissue products were produced by storing a roll of wet tissue in a storage container equipped with a container body and a lid for each of Examples 1 to 34 and Comparative Examples 1 to 14, and the following evaluations were performed.

1. Low replacement frequency Thirty monitors rated the replacement frequency of the roll when one roll of wet tissue was used up on a four-point scale as an index of the capacity of the wet tissue product. The evaluation was carried out as follows: ◎: low replacement frequency, allowing long use; ○: replacement frequency was about the same as that of general wet tissue products and no practical problems; △: replacement frequency was somewhat frequent and troublesome; ×: replacement frequency was frequent and unsuitable for practical use; and the evaluation with the largest number of people was the final evaluation.

2. Difficulty in drying of the sheet Thirty monitors took one wet tissue (sheet) out of the wet tissue storage container and used it, and rated the difficulty in drying of the wet tissue (sheet) on a four-point scale. The ratings were as follows: ◎: wetness remained the same after use as when it was first used, and there was no problem; ○: still somewhat wet after use, and there was no problem in practical use; △: almost dry by the time it was used; ×: dry during use, and not suitable for practical use; and the rating given by the largest number of people was the final rating.

3. Ease of removal of wet tissues (sheets) when removing the last few sheets from the storage container was evaluated by 30 monitors on a 4-point scale. The evaluation was as follows: ◎: hardly any clogging occurred throughout the entire roll and no problems in use; ○: almost no clogging occurred throughout the entire roll and no problems in practical use; △: clogging frequently occurred in the last few sheets and they were difficult to remove; ×: clogging frequently occurred throughout the entire roll and they were not suitable for practical use. The evaluation given by the most people was the final evaluation.

4. Inhibition of mold and fungal growth A preservative efficacy test was carried out in accordance with the Japanese Pharmacopoeia using a sheet from a roll where the number of sheets was half. A standard fungal mixture (Aspergillus brasiliensis NBRC 9455, Candida albicans NBRC 1594) was used as the fungal solution, and the measurement date was 28 days later.
The evaluation was made as follows: ◎: the number of bacteria was below the lower detection limit (10 bacteria/0.4 g); ○: the number of bacteria was 10 or more and was 1% or less of the number of inoculated bacteria; △: the number of bacteria was 10 or more and was 1% to 5% of the number of inoculated bacteria; and ×: the number of bacteria exceeded 5% of the number of inoculated bacteria.

Tables 1 and 2 show the conditions and evaluation results of each example, and Table 3 shows the conditions and evaluation results of each comparative example.

From the above, it was confirmed that this embodiment can provide a large-capacity wet tissue product in which the sheets do not dry out easily and the sheets generally do not clog the outlet regardless of the number of sheets remaining in the storage container.

1 Wet tissue product 10 (wet tissue) roll body 10a surface 10b back surface 10c perforation 10e edge 10x wet tissue (sheet)
20 (Wet tissue) storage container 21 Container body 22 Lid 221 Through hole 222 Introduction hole 223 Guide path 224 Small lid 225 Withdrawal hole 226 Inner plug

Claims (6)

a wet tissue roll body formed by winding up a nonwoven fabric sheet and impregnating it with a medicinal solution;
A wet tissue product comprising: a container body having an opening at an upper end thereof and configured to house the roll body; and a lid body removably attached to close the opening of the container body,
The sheet is perforated in the width direction at approximately equal intervals in the machine direction,
The ratio of the sheet length, which is the length between the perforations of the sheet, to the circumferential length of the roll body is 80% or more and 135% or less,
The impregnation ratio of the chemical solution in the sheet is 200% or more and 350% or less,
the number of sheets included in the roll is 50 or more and 130 or less,
The wet tissue product is characterized in that the weight loss rate of the sheet after being left in an environment of 50°C for 7 days is 20% or less. The wet tissue product according to claim 1, characterized in that the content of wood raw materials contained in the sheet is 30% or more and 80% or less. The wet tissue product according to claim 1, characterized in that when the medicinal solution impregnated from the sheet is squeezed, the alcohol concentration of the squeezed liquid is 5% by weight or more and 70% by weight or less. 2. The wet tissue product according to claim 1, wherein the sheet has a basis weight in an oven-dry state of 40 g/m2 or ^more and 65 g/ ^m2 or less. The wet tissue product according to claim 1, characterized in that the uniformity of the impregnation of the chemical solution in the sheet (the relative standard deviation of the impregnation rate for each sheet) is 20% or less. 2. The wet tissue product according to claim 1, wherein the thickness _T0 of the sheet when a load of 0.5 gf/ ^cm2 is applied to the sheet using a KES compression tester is 500 μm or more and 950 μm or less.