Method for producing disinfecting and sterilizing cloth, kit for producing disinfecting and sterilizing cloth, and disinfecting and sterilizing tool

Abstract

In order to provide a method for producing a disinfecting and sterilizing cloth that can be prepared and stored in advance, the cloth becoming usable shortly after supply of a chlorine-based disinfectant to a nonwoven fabric cloth and with a chlorine concentration being maintained over a long period, the method for producing a disinfecting and disinfecting cloth 1 comprises supplying, into a storage container 2 through an opening 2a in an upper surface thereof in a state in which 45 or more nonwoven fabric cloths 1a composed of wood pulp fibers and synthetic fibers are stacked vertically overlapping each other, a chlorine-based disinfectant in an amount 2.5 to 5 times the total dry weight of the 45 or more nonwoven fabric cloths 1a.

Description

How to make disinfection and sterilization cloths, disinfection and sterilization cloth making kits, and disinfection and sterilization tools

[0001] The present invention relates to a method for producing a disinfecting / sterilizing cloth impregnated with a chlorine-based disinfectant.

[0002] In medical facilities, nursing homes, and other such facilities, disinfecting and sterilizing cloths made from nonwoven fabrics impregnated with chlorine-based disinfectants (such as sodium hypochlorite solution) are used to disinfect or sterilize surfaces that people come into contact with, such as doorknobs, handrails, tables, and the area around toilet bowls.

[0003] Patent Document 1 describes a disinfectant-impregnated body obtained by impregnating a nonwoven fabric with a chlorine-based disinfectant. In this disinfectant-impregnated body, the nonwoven fabric serving as the base material is formed from fibers that inherently have low ability to adsorb disinfectants, such as polyester fibers, polyester-polyethylene sheath-core fibers, or polypropylene-polyethylene sheath-core fibers.

[0004] Japanese Patent Application Laid-Open No. 2005-013309

[0005] Chlorine-based disinfectants (chlorine-based disinfectants) are widely used because they are relatively inexpensive and readily available. However, because chlorine-based disinfectants react with organic matter contained in disinfection / disinfection cloths, the chlorine concentration in the disinfection / disinfection cloths decreases in a short period of time. Therefore, in medical facilities and other settings that use many disinfection / disinfection cloths, disinfection / disinfection cloths cannot be stockpiled, and disinfection / disinfection cloths are produced by impregnating dry nonwoven fabric cloths with chlorine-based disinfectants each time disinfection or sterilization is required. In this specification, "disinfection / disinfection" refers to disinfection that neutralizes bacteria and / or sterilization that reduces bacteria.

[0006] Furthermore, when supplying a large number of nonwoven cloths with chlorine-based disinfectant to stockpile disinfection and sterilization cloths, it is expected that at the above-mentioned site, the workers who will disinfect or sterilize will use the disinfection and sterilization cloths shortly after the chlorine-based disinfectant has been supplied. In the case of nonwoven cloths with low diffusibility of chlorine-based disinfectant when stacked, if the upper layer cloths are used shortly after the chlorine-based disinfectant is supplied, the upper layer cloths will contain excessive chlorine-based disinfectant, and a large amount of chlorine-based disinfectant will be consumed by the upper layer cloths, which may result in a shortage of chlorine-based disinfectant in the lower layer cloths.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a method for producing disinfection and sterilization cloths that can be used in a short time after supplying a chlorine-based disinfectant to a nonwoven fabric cloth, and that can store disinfection and sterilization cloths that maintain a chlorine concentration for a long period of time.

[0008] The inventors of the present application conducted extensive research into methods for preparing and storing disinfection / sanitizing cloths and found that nonwoven cloths made from pulp fibers and synthetic fibers are resistant to chlorine concentration loss and have good diffusibility of chlorine-based disinfectants when stacked in layers. They also found that when a chlorine-based disinfectant is supplied from the top layer of multiple nonwoven cloths used to make disinfection / sanitizing cloths, in an amount 2.5 to 5 times the total dry weight of the nonwoven cloths, the chlorine-based disinfectant quickly diffuses from the top to the bottom layers, achieving an appropriate impregnation level, making the disinfection / sanitizing cloths usable in a short time. Furthermore, they found that even if a worker prepares disinfection / sanitizing cloths at the start of a workday, the chlorine concentration remains at a level suitable for disinfection / sanitizing purposes for at least 8 hours (equivalent to the end of work).

[0009] The first invention based on these findings is a method for making disinfection and sterilization cloths, in which 45 or more nonwoven fabric cloths made of wood pulp fiber and synthetic fiber are stacked one on top of the other in a storage container having an opening on the top surface, and a chlorine-based disinfectant is supplied into the storage container through the opening in an amount that is 2.5 to 5 times the total weight of the 45 or more nonwoven fabric cloths in their dry state, thereby making disinfection and sterilization cloths.

[0010] In a second aspect of the present invention, in the first aspect, the storage container is a packaging container for a nonwoven fabric cloth.

[0011] In a third aspect of the present invention, in the first aspect, the nonwoven fabric cloth is a spunlace nonwoven fabric.

[0012] In a fourth aspect of the present invention, in the third aspect, the nonwoven fabric cloth has a mesh-like unevenness formed thereon, and the number of depressions in the unevenness is 8 to 40 per inch.

[0013] The fifth invention is a kit for making disinfectant and sterilizing cloths, which comprises a storage container with an outlet formed on the top surface, and 45 or more nonwoven cloths stored in a stacked state in the storage container, each nonwoven cloth being made of wood pulp fiber and synthetic fiber, and a disinfectant liquid product in which a chlorine-based disinfectant is stored in the container, and which is a method for making disinfectant and sterilizing cloths of the first invention, by supplying the chlorine-based disinfectant in the disinfectant liquid product from the outlet of the storage container in the nonwoven cloth product, thereby making it possible to make disinfectant and sterilizing cloths.

[0014] A sixth invention is a disinfection and sterilization tool comprising a storage container having an outlet formed on the top surface thereof, and 45 or more disinfection and sterilization cloths stored in a stacked state in the storage container, wherein each of the 45 or more disinfection and sterilization cloths is a nonwoven cloth made of pulp fiber and synthetic fiber impregnated with a chlorine-based disinfectant, and the weight of the 45 or more disinfection and sterilization cloths is 3.5 to 6 times the total weight of the same number of nonwoven cloths in a dry state as the disinfection and sterilization cloths.

[0015] In the method for producing disinfection / sanitizing cloths according to the present invention, as described above, the chlorine-based disinfectant diffuses quickly, achieving an appropriate impregnation level from the upper layer to the lower layer. Therefore, even if the upper layer of cloth is used shortly after the supply of chlorine-based disinfectant, the consumption of a large amount of chlorine-based disinfectant in the upper layer is avoided, and the lower layer of cloth can also be used as a disinfection / sanitizing cloth. Furthermore, even if a worker prepares disinfection / sanitizing cloths at the start of a workday, the chlorine concentration in the disinfection / sanitizing cloths is maintained at a level usable for disinfection / sanitizing purposes for at least 8 hours (equivalent to the end of work). According to the present invention, a method for producing disinfection / sanitizing cloths that can be used shortly after the supply of chlorine-based disinfectant to the nonwoven fabric cloth and maintains a chlorine concentration for a long period of time can be provided, allowing the production and storage of disinfection / sanitizing cloths.

[0016] Fig. 1(a) is a perspective view of a disinfection / sterilization tool according to an embodiment, Fig. 1(b) is a schematic diagram of the cross section taken along line A-A in Fig. 1(a), and Fig. 1(c) is a diagram for explaining how to fold a disinfection / sterilization cloth. Fig. 2 is a schematic diagram showing the injection step in the method for producing a disinfection / sterilization cloth according to an embodiment.

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are merely examples of the present invention and are not intended to limit the scope of the present invention, its applications, or its uses.

[0018] [Disinfection / Sterilization Tool and Disinfection / Sterilization Cloths] This embodiment is a disinfection / sterilization tool 10 shown in Figures 1(a) and 1(b). The disinfection / sterilization tool 10 includes a storage container 2 with an outlet 2a formed on the top surface and 45 or more disinfection / sterilization cloths 1 stored in a stacked state within the storage container 2. Each disinfection / sterilization cloth 1 is a nonwoven cloth 1a (see Figure 2) made of pulp fiber and synthetic fiber impregnated with a chlorine-based disinfectant. The weight of the 45 or more disinfection / sterilization cloths 1 is 3.5 to 6 times the total weight of the same number of nonwoven cloths 1a in a dry state as the disinfection / sterilization cloths 1. The disinfection / sterilization cloths 1 are disposable wipes used to disinfect or sterilize surfaces such as doorknobs, handrails, tables, and the area around toilet bowls.

[0019] The storage container 2 is a container made of a flexible resin film. This resin film can be made of one or more materials selected from biaxially oriented polyester, linear low-density polyethylene, high-density polyethylene, etc. The storage container 2 is, for example, a packaging container with the product name and manufacturer printed on the outside.

[0020] The top surface of the storage container 2 is provided with an access opening 2a for the disinfecting / removing cloth 1, a lid member 3 that closes the access opening 2a, and a holding member 4 that holds the lid member 3 in a closed state. The holding member 4 includes a base plate 4a with a cylindrical tubular portion connected to the access opening 2a, and a wall portion 4b that surrounds the tubular portion. A portion of the outer periphery of the lid member 3 is connected to the wall portion 4b. The lid member 3 is formed with a side wall portion that protrudes from the outer periphery of the plate-shaped main body toward the holding member 4. When the lid member 3 is closed, the wall portion 4b fits inside the side wall portion, thereby holding the lid member 3 in a closed state. With the lid member 3 closed, the interior of the storage container 2 is sealed.

[0021] The number of disinfection / sanitizing cloths 1 in the storage container 2 is, for example, 45 or more, and preferably 90 to 210 (e.g., 90 to 110). In this embodiment, the number of disinfection / sanitizing cloths 1 is 100. In facilities where fewer disinfection / sanitizing cloths 1 are used per day, the number of disinfection / sanitizing cloths 1 may be 45 to 60 (e.g., 50), and in facilities where more disinfection / sanitizing cloths 1 are used per day, the number of disinfection / sanitizing cloths 1 may be 130 to 210 (e.g., 150 or 200).

[0022] In the storage container 2, all disinfection / sterilization cloths 1 are folded in the same way to have the same planar dimensions. Here, the disinfection / sterilization cloths 1 are formed in a substantially rectangular shape. The planar dimensions of the disinfection / sterilization cloths 1 are 100 mm x 100 mm to 400 mm x 400 mm. In this embodiment, the disinfection / sterilization cloths 1 are formed in a substantially square shape of 200 mm x 200 mm. Each disinfection / sterilization cloth 1 is folded inward at the position of the dashed line shown in FIG. 1(c). The folded disinfection / sterilization cloth 1 is, for example, 100 mm to 200 mm in planar dimensions. The disinfection / sterilization cloth 1 is preferably folded so that two layers of cloth overlap.

[0023] Within the storage container 2, the folded disinfection / sterilization cloths 1 are stored in a stacked state, with the entirety of the cloths overlapping one another. The collection of stacked disinfection / sterilization cloths 1 within the storage container 2 is roughly rectangular. The storage container 2 is slightly larger than the collection of disinfection / sterilization cloths 1. The storage container 2 is roughly rectangular when all of the disinfection / sterilization cloths 1 are stored therein (see FIG. 1(a)). The height of the storage container 2 varies depending on the number of disinfection / sterilization cloths 1. Note that the state (folding and stacking state) of the disinfection / sterilization cloths 1 within the storage container 2 is the same as the state of the nonwoven fabric cloth 1a within the storage container 2 when the disinfection / sterilization cloths 1 are made.

[0024] The nonwoven fabric cloth 1a used to make the disinfection / sterilization cloth 1 is a spunlace nonwoven fabric. Here, "spunlace nonwoven fabric" refers to a nonwoven fabric manufactured using the spunlace method, including nonwoven fabrics manufactured by applying the spunlace method to nonwoven fabrics manufactured by other methods in a previous process. For example, in the manufacture of the nonwoven fabric cloth 1a, a synthetic fiber nonwoven fabric sheet is obtained using the spunbond method in a previous process, and then the wood pulp fibers are hydroentangled with a high-pressure water stream onto the synthetic fiber nonwoven fabric sheet placed on a net using the spunlace method. The nonwoven fabric cloth 1a has a mesh-like unevenness uniformly formed over its entire surface. In the nonwoven fabric cloth 1a, the number of depressions in this unevenness is 8 to 40 (20 in this embodiment) per inch. In other words, the number of depressions in the unevenness is 64 to 1600 per square inch. The mesh-like unevenness is formed to correspond to the mesh of the net used in the spunlace method. The number of meshes per inch of this net is 8 to 40. Each nonwoven fabric cloth 1a has a basis weight of 30 g / m ２ ~60g / m ２ (In this embodiment, 40 g / m ２ ), and the thickness is 0.20 mm to 0.60 mm (0.27 mm to 0.34 mm in this embodiment).

[0025] The nonwoven fabric cloth 1a is made of a mixture of wood pulp fibers and synthetic fibers, and the blending ratio of the fibers in the nonwoven fabric cloth 1a can be 60% to 90% by weight of wood pulp fibers and 40% to 10% by weight of synthetic fibers.

[0026] The synthetic fibers used as the raw material for the nonwoven fabric cloth 1a may be one or a combination of polyethylene terephthalate (PET), polypropylene (PP), etc. These may also be combined with polyethylene.

[0027] Examples of chlorine-based disinfectants that can be used to impregnate the nonwoven fabric cloth 1a include chlorine-based bleach (sodium hypochlorite solution), hypochlorous acid water, chlorous acid water, calcium hypochlorite aqueous solution (chlorine), and the oxidizing agent potassium hydrogen peroxymonosulfate.

[0028] [Method for Producing a Disinfection / Sanitizing Cloth] Next, a method for producing the disinfection / sanitizing cloth 1 will be described.

[0029] The method for producing the disinfection and sterilization cloth 1 involves preparing 45 or more nonwoven fabric cloths 1a stored in a storage container 2 in a stacked state, and then, as shown in Figure 2, carrying out an injection step in which a chlorine-based disinfectant 6 is injected from the outlet 2a (upper layer side) of the storage container 2 in an amount 2.5 to 5 times (preferably 3 to 4 times) the total weight of the nonwoven fabric cloths 1a in the dry state inside the storage container 2. Note that the lid member 3 is not shown in Figure 2.

[0030] When the injection process is carried out, the chlorine-based disinfectant quickly diffuses through the collection of nonwoven fabric cloths 1a in the storage container 2, achieving an appropriate amount of impregnation from the upper to lower layers, and all of the nonwoven fabric cloths 1a can be used as disinfection and sterilization cloths 1 in a short period of time.

[0031] The concentration of the chlorine-based disinfectant 6 injected in the injection process can be determined depending on the object to be disinfected or sterilized. For example, a chlorine concentration of 200 ppm is required for daily wiping cleaning and disinfection of countertops, cooking utensils, floors, doorknobs, toys, etc., so a chlorine-based disinfectant 6 of 200 ppm or slightly stronger than 200 ppm is injected. Environmental disinfection against the novel coronavirus requires a chlorine concentration of 500 ppm, so a chlorine-based disinfectant 6 of 500 ppm or slightly stronger than 500 ppm is injected. Disinfection of areas contaminated with vomit or excrement or toilet seats after excretion requires a chlorine concentration of 1000 ppm, so a chlorine-based disinfectant 6 of 1000 ppm or slightly stronger than 1000 ppm is injected.

[0032] The storage container 2 may have a bottom, sides, and a top. In addition to the container shown in FIG. 1( a), the storage container 2 may be a container made of a flexible resin film with perforations on the top. The access port 2a is formed by cutting the perforations. The storage container 2 may be made of a hard material instead of a flexible resin film.

[0033] It is also possible to configure a disinfection / sanitizing cloth making kit so that items necessary for making the disinfection / sanitizing cloth 1 can be easily prepared. The disinfection / sanitizing cloth making kit includes a nonwoven cloth product and a disinfectant liquid product. The nonwoven cloth product has a storage container 2 and 45 or more nonwoven cloths 1a stored in a stacked state in the storage container 2. The disinfectant liquid product is a container in which a chlorine-based disinfectant 6 is stored. In the disinfection / sanitizing cloth making kit, the method for making the disinfection / sanitizing cloth 1 is written, for example, on the outer surface of the storage container 2 or the outer surface of the container of the chlorine-based disinfectant 6, or on the paper packaging provided with the product.

[0034] [Effects of the Embodiment] In the method for producing a disinfection / sterilization cloth 1 according to this embodiment, as described in the examples below, the chlorine-based disinfectant diffuses quickly, achieving an appropriate impregnation level from the upper layer to the lower layer. Therefore, even if the upper layer cloth 1 is used shortly after the supply of chlorine-based disinfectant, the upper layer cloth 1 does not consume a large amount of chlorine-based disinfectant, and the lower layer cloth 1 can also be used as a disinfection / sterilization cloth. Furthermore, even if a worker prepares the disinfection / sterilization cloth 1 at the start of a workday, the chlorine concentration remains at a level usable for disinfection / sterilization for up to 8 hours (equivalent to the end of work). This embodiment provides a method for producing disinfection / sterilization cloths 1 that can be used shortly after the supply of chlorine-based disinfectant to the nonwoven fabric cloth 1a and maintains a chlorine concentration for a long period of time, allowing for the production and storage of disinfection / sterilization cloths 1.

[0035] In this embodiment, the storage container 2 is a packaging container for the nonwoven fabric cloth 1a, so the disinfection / sterilization cloth 1 can be made directly from the nonwoven fabric cloth 1a stored in the packaging container 2. In addition, because the storage container 2 is transparent or translucent, the impregnation state of the disinfection / sterilization cloth 1 can be confirmed from outside the storage container 2.

[0036] The storage container 2 may be a container that can be reused to make the disinfecting / sanitizing cloths 1. In this case, a flexible container with an opening that can be opened and closed by an opening / closing means such as a zipper on the long side can be used for the storage container 2. To make the disinfecting / sanitizing cloths 1, the opening / closing means of the empty storage container 2 is opened, and 45 or more nonwoven cloths 1a as materials for the disinfecting / sanitizing cloths 1 are placed into the storage container 2 through the opening. Then, after the opening / closing means is closed, a chlorine-based disinfectant 6 is poured into the storage container 2 through the outlet 2a on the top surface.

[0037] The present invention will be described with reference to examples. However, the present invention is not limited to the examples as long as the gist of the invention is not exceeded.

[0038] In Example 1, 100 disinfection / sterilization cloths (hereinafter sometimes referred to as a "disinfection / sterilization cloth assembly") were produced using the disinfection / sterilization cloth production method according to the present invention. A storage container of the configuration shown in FIG. 1 was used to produce the disinfection / sterilization cloths. Each nonwoven cloth was a square cloth folded inward at the dotted line shown in FIG. 1(c). The folded nonwoven cloths were stored in a stacked state, one on top of the other, in the storage container. After the chlorine-based disinfectant was injected, the change in the impregnation rate of the chlorine-based disinfectant and the change in the chlorine concentration over time were measured for each of the top 10 of the 100 disinfection / sterilization cloths stacked one on top of the other.

[0039] In Example 1, a spunlace nonwoven fabric containing 70% by weight of wood pulp and 30% by weight of polypropylene was used as the nonwoven fabric cloth material for the disinfection and sterilization cloth. This nonwoven fabric cloth had a planar dimension of 200 mm x 200 mm, and had a mesh-like uneven surface with 25 recesses per inch. The basis weight was 40 g / m². ２ The thickness was in the range of 0.27 to 0.34 mm.

[0040] To prepare the disinfection and sterilization cloths, 100 nonwoven cloths were placed in a container, and a sodium hypochlorite solution (chlorine-based disinfectant) with a sodium hypochlorite concentration of 200 ppm was poured into the container through the outlet. The total dry weight of the 100 nonwoven cloths was 160 g, and the weight of the sodium hypochlorite solution poured into the container was 560 g, which was 3.5 times the total dry weight of the 100 nonwoven cloths. The sodium hypochlorite solution used was a diluted version of Kao Corporation's chlorine-based clothing bleach, "Haiter."

[0041] After the sodium hypochlorite solution was poured in, an opening was made in the short side of the container in accordance with the measurement time described below. The disinfection / sterilization cloth assembly was then removed from the opening, and the disinfection / sterilization cloth assembly was then divided into 10 sets of 10 nonwoven cloth bundles (hereinafter referred to as "cloth bundles"), starting from the top. Each set of cloth bundles was then manually squeezed over a beaker, and the impregnation rate and chlorine concentration were measured using the squeezed liquid of chlorine-based disinfectant as a sample. After the sodium hypochlorite solution was poured in, the outlet of the container was kept closed with a lid until just before the disinfection / sterilization cloth was removed from the container.

[0042] In Example 1, five disinfection / sterilization cloth assemblies were prepared. These five were used so that the measurement time was 5 minutes, 20 minutes, 1 hour, 2 hours, and 8 hours after the completion of injection of the sodium hypochlorite solution to the start of removing the disinfection / sterilization cloth assemblies from the storage container. This was the same for Example 2 and Comparative Example 1.

[0043] The wet-out rate was measured by measuring the weight of the liquid squeezed from each cloth bundle. The weight of the liquid squeezed from each cloth bundle was then divided by the dry weight (16 g) of each cloth bundle to obtain the "wet-out rate (%)." The measurement results are shown in Table 1.

[0044]

[0045] The chlorine concentration (ppm) of the wringed liquid from each cloth bundle was measured using chlorine test paper (product name: HYDRION (registered trademark) CM-240) manufactured by Toho Co., Ltd. The measurement results are shown in Table 2.

[0046]

[0047] In Example 2, 100 disinfection and sterilization cloths were prepared using the same procedure as in Example 1, and the same measurements were carried out as in Example 1. Example 2 differed from Example 1 only in that the concentration of sodium hypochlorite was 500 ppm. The measurement results of the impregnation rate of the chlorine-based disinfectant in Example 2 are shown in Table 3, and the measurement results of the chlorine concentration are shown in Table 4.

[0048]

[0049]

[0050] In Comparative Example 1, 100 disinfection and sterilization cloths were prepared using the same procedure as in Example 1, and the same measurements were performed as in Example 1. Comparative Example 1 differed from Example 1 only in that a plain spunlace nonwoven fabric containing 70% by weight of rayon and 30% by weight of polyester was used as the nonwoven fabric material for the disinfection and sterilization cloths. The measurement results for the impregnation rate of the chlorine-based disinfectant in Comparative Example 1 are shown in Table 5, and the measurement results for the chlorine concentration are shown in Table 6.

[0051]

[0052]

[0053] In Comparative Example 2, 100 disinfection / sterilization cloths were prepared using the same procedure as in Example 1, and the same measurements were performed as in Example 1. Comparative Example 2 differed from Example 1 only in that a plain spunlace nonwoven fabric containing 100% cotton by weight was used as the nonwoven fabric material for the disinfection / sterilization cloths. The measurement results of the impregnation rate of the chlorine-based disinfectant in Comparative Example 2 are shown in Table 7, and the measurement results of the chlorine concentration are shown in Table 8. In Comparative Example 2, in order to analyze the decrease in chlorine concentration in detail, six disinfection / sterilization cloth assemblies were prepared, and in addition to the five measurement times as in Example 1, measurements were also performed after 4 hours.

[0054]

[0055]

[0056] In Example 1, the sodium hypochlorite solution diffused quickly, and after 5 minutes, the impregnation rate exceeded 300% in the entire cloth bundle (from the top layer to the bottom layer), and the chlorine concentration reached 200 ppm in all cloth bundles (see Table 1). Even after 8 hours, the chlorine concentration remained at 200 ppm, except for one middle cloth bundle (see Table 2). In Example 2, the sodium hypochlorite solution diffused quickly, and after 5 minutes, the impregnation rate exceeded 290% (almost 300%) in all cloth bundles, and the chlorine concentration remained at 500 ppm in all cloth bundles (see Tables 3 and 4). Even after 8 hours, the chlorine concentration remained at 500 ppm, except for one middle cloth bundle. It was found that the methods for producing disinfection and sterilization cloths according to Examples 1 and 2 enable the supply of chlorine-based disinfectant to the nonwoven fabric cloths, allowing for the production and storage of disinfection and sterilization cloths that can be used in a short time, and maintain a chlorine concentration for a long period of time.

[0057] In contrast, in Comparative Example 1, the diffusion of the sodium hypochlorite solution was slower than in Example 1, and it took one hour for the impregnation rate in the bottom cloth bundle to exceed 200% (see Table 5), and the chlorine concentration in all cloth bundles did not reach 200 ppm over the entire measurement time (see Table 6). Furthermore, after 20 minutes, the chlorine concentration was 200 ppm from the top to the third cloth bundle, but after one hour, the chlorine concentration in all cloth bundles fell below 200 ppm. Although the nonwoven fabric cloth of Comparative Example 1 could be used as a disinfection / disinfection cloth from the top layer to near the middle for about 20 minutes after production, it was found that it was difficult to make and store disinfection / disinfection cloths.

[0058] Furthermore, in Comparative Example 2, due to the excellent water retention of cotton, the sodium hypochlorite solution did not reach the lower layers even after a certain period of time (see Table 7). As a result, the chlorine concentration in the bottommost cloth bundle only reached 200 ppm after 20 minutes (see Table 8). Furthermore, after 4 hours, the chlorine concentration fell below 200 ppm in the layers below the 71st to 80th cloth bundles, and after 8 hours, the chlorine concentration fell below 200 ppm in the layers below the 31st to 40th cloth bundles. With the nonwoven fabric cloth of Comparative Example 2, the chlorine concentration was maintained from the top layer to just before the middle until 8 hours, but it was found difficult to produce a sufficient number of disinfection / sanitizing cloths for storage. Furthermore, the impregnation rate of the bottommost cloth bundle did not exceed 200% until 4 hours later. To properly disinfect with disinfection / sanitizing cloths, a wetness level of at least 200% impregnation rate is required. Therefore, it was found that if a user uses a disinfectant / sanitizing cloth too quickly, the cloth underneath becomes unusable.

[0059] The present invention is applicable to a method for producing a disinfection / sterilization cloth impregnated with a chlorine-based disinfectant, etc.

[0060] 1 Disinfection and sterilization cloth 1a Nonwoven cloth 2 Storage container 2a Discharge port 6 Chlorine-based disinfectant

Claims

1. A method for making a disinfectant / sterilizing cloth, comprising stacking 45 or more nonwoven fabric cloths made of wood pulp fibers and synthetic fibers one on top of the other in a container having an opening on the top surface, and supplying 2.5 to 5 times as much chlorine-based disinfectant as the total weight of the 45 or more nonwoven fabric cloths in a dry state into the container through the opening, thereby creating a disinfectant / sterilizing cloth.

2. The method for making a disinfection / sanitization cloth as described in claim 1, wherein the storage container is a packaging container for a nonwoven cloth.

3. The method for making a disinfection / sterilization cloth according to claim 1, wherein the nonwoven cloth is a spunlace nonwoven cloth.

4. A method for making a disinfection / sterilization cloth as described in claim 3, wherein the nonwoven cloth has a mesh-like unevenness formed thereon, and the number of depressions in the unevenness is 8 to 40 within a length of 1 inch.

5. A disinfection / sterilization cloth making kit comprising: a storage container having an outlet formed on the upper surface; and 45 or more nonwoven cloths stored in a stacked state in the storage container, each nonwoven cloth being made of wood pulp fiber and synthetic fiber; and a disinfectant liquid product in which a chlorine-based disinfectant is stored in a container, said disinfectant / sterilization cloth making kit comprising: a storage container having an outlet formed on the upper surface of the storage container; and a disinfectant / sterilization cloth making kit comprising: a storage container having an outlet formed on the upper surface of the storage container; and a disinfectant liquid product in which a chlorine-based disinfectant is stored in a container, said disinfectant / sterilization cloth making kit being capable of making a disinfectant / sterilization cloth as described in claim 1.

6. A disinfection and sterilization tool comprising: a storage container with an outlet formed on the upper surface; and 45 or more disinfection and sterilization cloths stored in a stacked state inside the storage container, each of the 45 or more disinfection and sterilization cloths being a nonwoven cloth made of pulp fibers and synthetic fibers impregnated with a chlorine-based disinfectant, and the weight of the 45 or more disinfection and sterilization cloths is 3.5 to 6 times the total weight of the same number of nonwoven cloths in a dry state as the disinfection and sterilization cloths.

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