Wet wipe manufacturing system and wet wipe manufacturing method

Abstract

To produce both a fragranced wet sheet and a fragrance-free or non-fragranced wet sheet while suppressing production cost increase.SOLUTION: A toilet cleaner production system 100 comprises: a fragrance-free drug solution impregnation device 150 for impregnating a base sheet S with a fragrance-free drug solution C1 including no fragrance; and a fragrance drug solution impregnation device 180 for impregnating the base sheet S with a fragrance drug solution C2 including a fragrance. A production method of a toilet cleaner using the toilet cleaner production system 100 comprises: a fragrance-free drug solution impregnation step (step S4) for impregnating the base sheet S with the fragrance-free drug solution C1 including no fragrance; and a fragrance drug solution impregnation step (step S6) for impregnating the base sheet S with the fragrance drug solution C2 including fragrance.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wet sheet manufacturing system and a wet sheet manufacturing method.

Background Art

[0002] In recent years, for example, disposable wet sheets are increasingly used as cleaning sheets for cleaning toilets, kitchens, floors, etc. and body sheets for wiping sweat. As a method for manufacturing such wet sheets, a method of impregnating a base paper sheet with a chemical solution by a method such as spray coating is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Wet sheets include scented products, fragrance-free or non-fragrant products. Here, the "scented product" refers to a product in which the impregnated chemical solution contains a fragrance for imparting a preferred scent, the "fragrance-free product" refers to a product in which the impregnated chemical solution does not contain a fragrance, and the "non-fragrant product" refers to a product in which the impregnated chemical solution does not contain a fragrance for imparting a preferred scent and contains a fragrance for making a specific unpleasant scent less noticeable.

[0005] In this regard, since fragrances adhere to various facilities in the manufacturing process, in order to manufacture a fragrance-free or non-fragrant product using the same production line after manufacturing a scented product, it is necessary to remove the fragrance components through processes such as water washing, alcohol washing, heating, drying, wiping, punching out (co-washing), etc. However, during such operations, production has to be stopped, which becomes a factor in increasing the production cost of wet sheets. Furthermore, while setting up multiple production lines would eliminate the need for the aforementioned steps to remove fragrance components, establishing new production lines itself incurs significant costs.

[0006] The objective of this invention is to enable the production of both scented and unscented or fragrance-free wet wipes while suppressing increases in manufacturing costs. [Means for solving the problem]

[0007] To solve the above problems, the invention described in claim 1 relates to a wet wipe manufacturing system, A fragrance-free chemical impregnation method for impregnating a base paper sheet with a fragrance-free chemical solution that does not contain fragrances, A fragrance solution impregnation means for impregnating the base paper sheet with a fragrance solution containing fragrance, Equipped with 、 The aforementioned fragrance liquid impregnation means is A first fragrance solution impregnation means for impregnating the base paper sheet with a first fragrance solution containing a first fragrance, A second fragrance solution impregnation means for impregnating the base paper sheet with a second fragrance solution containing a second fragrance, Includes, The first fragrance solution impregnation means and the second fragrance solution impregnation means spray the fragrance solution onto the base paper sheet from different angles. It is characterized by the following:

[0008] The invention described in claim 2 is a wet wipe manufacturing system described in claim 1, The fragrance-impregnation means is characterized by impregnating the base paper sheet, which has been impregnated with the fragrance-free liquid by the fragrance-free liquid impregnation means, with the fragrance-impregnation liquid.

[0009] The invention described in claim 3 is a wet wipe manufacturing system described in claim 2, The system includes a lamination means for stacking multiple sheets of the aforementioned base paper, The fragrance-free chemical impregnation means impregnates the base paper sheet with the fragrance-free chemical before the base paper sheet is laminated by the lamination means, and the fragrance chemical impregnation means impregnates the base paper sheet with the fragrance chemical after the base paper sheet is laminated by the lamination means.

[0010] The invention according to claim 4 is, in the wet sheet manufacturing system according to claim 1, The fragrance chemical solution is characterized by containing a masking fragrance.

[0013] Claim 5 The invention according to is, in the wet sheet manufacturing method, A fragrance-free chemical solution impregnation step of impregnating a base paper sheet with a fragrance-free chemical solution that does not contain a fragrance, A fragrance chemical solution impregnation step of impregnating the base paper sheet with a fragrance chemical solution containing a fragrance, including fruit, The aforementioned fragrance solution impregnation step is, A first fragrance solution impregnation step involves impregnating the base paper sheet with a first fragrance solution containing a first fragrance, A second fragrance solution impregnation step involves impregnating the base paper sheet with a second fragrance solution containing a second fragrance, Includes, In the first fragrance solution impregnation step and the second fragrance solution impregnation step, the fragrance solution is sprayed onto the base paper sheet from different angles. characterized by this.

[0014] Claim 6 The invention according to is, in the wet sheet manufacturing method according to claim 5 The fragrance chemical solution impregnation step is characterized by impregnating the base paper sheet impregnated with the fragrance-free chemical solution by the fragrance-free chemical solution impregnation step with the fragrance chemical solution.

[0015] 7 Claim 6 The invention according to is, in the wet sheet manufacturing method according to claim 6 The fragrance chemical solution impregnation step is characterized by impregnating the base paper sheet impregnated with the fragrance-free chemical solution by the fragrance-free chemical solution impregnation step with the fragrance chemical solution. including a lamination step of laminating a plurality of the base paper sheets, The fragrance-free chemical solution impregnation step is carried out before the lamination step, and the fragrance chemical solution impregnation step is carried out after the lamination step, characterized by this.

[0016] Claim 8 The invention according to is, in the wet sheet manufacturing method according to claim 5 The fragrance chemical solution is characterized by containing a masking fragrance.

Advantages of the Invention

[0019] According to the present invention, it is possible to manufacture both scented wet wipes and unscented or unscented wet wipes while suppressing increases in manufacturing costs. [Brief explanation of the drawing]

[0020] [Figure 1] This is a flowchart showing a method for manufacturing wet wipes according to an embodiment. [Figure 2] This is a schematic diagram showing a wet wipe manufacturing system according to an embodiment. [Figure 3] This is a schematic diagram showing a modified wet wipe manufacturing system. [Modes for carrying out the invention]

[0021] Embodiments of the present invention will be described below with reference to Figures 1 to 3. However, the technical scope of the present invention is not limited to the illustrated examples. In the following, we will describe the manufacturing of toilet cleaner, a type of wet wipe used for cleaning toilets, as an example of a wet wipe. Furthermore, in the description of this embodiment, the numerical range described using "from" includes the numbers described before and after it as the lower and upper limits, respectively.

[0022] [1. Explanation of the manufacturing method] The manufacturing method for producing a toilet cleaner using the toilet cleaner manufacturing system 100 according to the embodiment includes, as shown in Figure 1, a base paper feeding step (step S1), a pressing step (step S2), a cutting and folding step (step S3), an unscented chemical impregnation step (step S4), a lamination step (step S5), a fragrance chemical impregnation step (step S6), and a packaging step (step S7). Furthermore, the toilet cleaner manufacturing system 100 is a complete manufacturing line for producing toilet cleaners.

[0023] [(1) Step S1: Paper feed process] When manufacturing a toilet cleaner using the toilet cleaner manufacturing system 100, first, a base paper sheet S is unfurled from the raw material roll 110 provided by the toilet cleaner manufacturing system 100.

[0024] The raw material roll 110 is configured to wind up a long sheet of raw paper S and allow it to be continuously unwound.

[0025] Furthermore, the base paper sheet S is processed from thin paper formed by papermaking a fiber aggregate mainly using known pulp fibers as raw materials.

[0026] The base paper sheet S may consist of multiple sheets laminated together or a single sheet, but the basis weight must be 30 g / m². 2 From 150g / m 2 It is preferable that it be within a certain range. The basis weight is based on JIS P8124.

[0027] The raw materials for the fiber aggregate can be natural or synthetic fibers, and these can be mixed. Suitable raw materials include wood pulp, non-wood pulp, cellulose fibers such as rayon and cotton, and biodegradable fibers such as polylactic acid. In addition, polyethylene fibers, polypropylene fibers, polyvinyl alcohol fibers, polyester fibers, polyacrynitrile fibers, synthetic pulp, glass wool, etc., can be used in combination with these fibers as the main component.

[0028] The fiber aggregate preferably contains at least pulp, and the pulp used as raw material is preferably a mixture of bleached hardwood kraft pulp (LBKP) and bleached softwood kraft pulp (NBKP) in appropriate proportions. The preferred pulp blending ratio is 50% to 70% by mass of bleached softwood kraft pulp, with 65% by mass being particularly preferred.

[0029] Furthermore, a water-soluble binder is added to the base paper sheet S. As the water-soluble binder, for example, a water-soluble polymer having carboxyl groups, such as carboxymethylcellulose (hereinafter referred to as CMC), can be used. When CMC is used as the water-soluble binder, the amount added is preferably 0.5 to 1.0% by mass relative to the mass of the base paper sheet S.

[0030] [(2) Step S2: Pressing process] Next, the base paper sheet S, which was unwound from the raw material roll 110 in step S1, is passed through the press processing device 120 of the toilet cleaner manufacturing system 100 to perform press processing.

[0031] As shown in Figure 2, the press working apparatus 120 has two rolls, a top roll 121 and a bottom roll 122, and is configured to compress the base paper sheet S by passing it between these rolls. This press working process makes it easier for the chemical solution to penetrate into the interior of the base paper sheet S.

[0032] Furthermore, by using embossed rolls as the top roll 121 and bottom roll 122, the embossing process may be performed on the base paper sheet S simultaneously with the pressing process in this step.

[0033] [(3) Step S3: Cutting and folding process] Next, the base paper sheet S, which has undergone press processing in step S2, is cut to an appropriate size and folded using the cutting and folding device 130 of the toilet cleaner manufacturing system 100. The size to be cut and the folding method are not particularly limited, as long as they are suitable for the use of the toilet cleaner.

[0034] [(4) Step S4: Fragrance-free chemical solution impregnation process] The base paper sheet S, which has been cut and folded in step S3, is placed on the first conveyor 140 and transported in a certain direction. During transport, it is impregnated with the fragrance-free chemical solution C1 by the fragrance-free chemical solution impregnation device 150 located above the first conveyor 140.

[0035] The fragrance-free chemical impregnation device 150 includes a fragrance-free chemical spray nozzle 151 for spraying fragrance-free chemical solution C1, a fragrance-free chemical tank 152 for storing fragrance-free chemical solution C1, and a fragrance-free chemical pipe 153 that connects the fragrance-free chemical spray nozzle 151 and the fragrance-free chemical tank 152. The fragrance-free chemical solution C1 stored in the fragrance-free chemical tank 152 is sprayed from the fragrance-free chemical spray nozzle 151, which is located above the first conveyor 140, to impregnate the base paper sheet S with the fragrance-free chemical solution C1.

[0036] The amount of fragrance-free liquid C1 impregnated into the base paper sheet S, which is the base material of the toilet cleaner, is preferably 100 to 500% by mass relative to the sheet's mass, and more preferably 150 to 300% by mass.

[0037] Fragrance-free chemical solution C1 is a chemical solution that does not contain fragrances, and preferably contains auxiliary agents such as glycol ethers, aqueous cleaning agents, preservatives, disinfectants, and organic solvents, in addition to water and a crosslinking agent that crosslinks with a water-soluble binder. Here, "fragrance" refers to a substance used to impart a scent to an object, and includes both natural fragrances extracted from plants and animals, and chemically synthesized synthetic fragrances. In addition to those used to impart a pleasant scent to an object, it also includes masking fragrances used to mask specific undesirable scents.

[0038] As crosslinking agents, boric acid, various metal ions, etc., can be used, but when CMC is used as a water-soluble binder, it is preferable to use polyvalent metal ions. In particular, it is preferable to use one or more polyvalent metal ions selected from the group consisting of alkaline earth metals, manganese, zinc, cobalt, and nickel, because it allows for sufficient bonding between fibers and exhibits sufficient wet strength for use, while also ensuring sufficient hydrolytic properties. Among these metal ions, it is especially preferable to use calcium, strontium, barium, zinc, cobalt, and nickel ions.

[0039] Glycol ethers are compounds in which the hydroxyl groups at one or both ends of a glycol, a dihydric alcohol, are etherified. They contain hydrophobic alkyl groups and hydrophilic ether and hydroxyl groups within the molecule. Compared to surfactants, they have a smaller molecular weight and lower dynamic surface tension than conventional detergents containing only surfactants, allowing for faster interface formation between the cleaning solution and the dirt. Furthermore, glycol ethers act as coupling agents that make hydrophobic oils and dirt compatible with water, separating the dirt and preventing its re-adhesion. Therefore, adding glycol ethers to the cleaning solution can improve the wiping performance of toilet cleaners.

[0040] Glycol ethers that can be included include propylene glycol monomethyl ether (PGME), diethylene glycol monobutyl ether (DGME), ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethylene glycol isopropyl ether, diethylene glycol monoisopropyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethylene glycol isopropyl ether, diethylene glycol monoisopropyl ether, and ethylene glycol monobutyl ether.

[0041] Of these, PGME is usually added as a cleaning agent and is known to improve cleaning power, but it also directly improves sheet strength and enhances the sheet strength-improving effect of CMC and polyvalent metal ions. When PGME is added to the base paper sheet S, the amount added is 20 g / m². 2 From 60g / m 2 Preferably, it is 26 g / m². 2 From 40g / m 2 That is the case.

[0042] As aqueous cleaning agents, for example, in addition to surfactants, lower or higher (aliphatic) alcohols can be used.

[0043] For example, parabens such as methylparaben, ethylparaben, and propylparaben can be used as preservatives.

[0044] Examples of disinfectants that can be used include benzalkonium chloride, chlorhexidine gluconate, povidone-iodine, ethanol, benzalkonium cetyl oxide, triclosan, chloroxylenol, and isopropylmethylphenol.

[0045] Polyhydric alcohols such as glycol (divalent), glycerin (trivalent), and sorbitol (tetravalent) can be used as organic solvents.

[0046] Furthermore, the auxiliary agents for the components of the aforementioned chemical solution can be selected as appropriate, and components that perform other functions may be included in the chemical solution as needed. For example, propylene glycol (PG) can be used as an auxiliary agent for solubilizing preservatives and disinfectants.

[0047] The most preferred method for impregnating the base paper sheet S with the fragrance-free chemical solution C1 is spray application using a spray nozzle as described above, but the method is not limited to this, as long as it can impregnate the sheet with the fragrance-free chemical solution C1 in an appropriate amount. For example, impregnation may be carried out by methods such as nozzle impregnation or roll transfer, as long as it can impregnate the sheet with the fragrance-free chemical solution C1 in an appropriate amount.

[0048] [(5) Step S5: Lamination process] Next, the lamination device 160 of the toilet cleaner manufacturing system 100 stacks multiple sheets of base paper S that have been impregnated with the unscented chemical solution C1 in step S4. The resulting stack of multiple cut and folded base paper sheets S is called a sheet block B. The number of layers to be stacked is not particularly limited, but about 10 layers is preferable.

[0049] [(6) Step S6: Fragrance solution impregnation process] The sheet blocks B formed by stacking in step S5 are placed on the second conveyor 170 and transported in a constant direction, and during transport, they are impregnated with fragrance liquid C2 by a fragrance liquid impregnation device 180 located above the second conveyor 170.

[0050] The fragrance impregnation device 180 includes a fragrance spray nozzle 181 for spraying fragrance solution C2, a fragrance tank 182 for storing fragrance solution C2, and a fragrance pipe 183 connecting the fragrance spray nozzle 181 and the fragrance tank 182. The fragrance spray nozzle 181, located above the second conveyor 170, sprays the fragrance solution C2 stored in the fragrance tank 182 to impregnate the sheet block B with fragrance solution C2. The spray direction may be directly above the sheet block B, or it may be sprayed at an angle from above so as to hit the side of the sheet block B.

[0051] Furthermore, since fragrances are oil-soluble and readily adhere to resin products, it is preferable that the fragrance solution spray nozzle 181, fragrance solution tank 182, and fragrance solution piping 183 that constitute the fragrance solution impregnation device 180 are made of a metal material such as SUS (stainless steel).

[0052] The spray nozzle 181 for the fragrance liquid may be used to continuously spray the fragrance liquid C2 after a liquid recovery device is installed at the bottom, or it may be used only when a sensor that detects the passage of sheet block B is installed immediately before the spraying point.

[0053] The impregnation with fragrance solution C2 results in the creation of a laminate, specifically a layered structure consisting of multiple sheets of toilet cleaner.

[0054] It is preferable that the ratio of the amount of fragrance solution C2 impregnated to the amount of unscented solution C1 impregnated in step S4 and the amount of fragrance solution C2 impregnated in step S6 be such that the amount of fragrance solution C2 impregnated is 1.0% to 3.0% by mass of the total impregnation amount (the amount of unscented solution C1 impregnated is 97.0% to 99.0% by mass of the total impregnation amount). If the proportion of fragrance solution C2 is reduced further, it becomes difficult for the fragrance solution C2 to spread throughout the entire sheet block B. If the proportion of fragrance solution C2 is increased further, a larger amount of the fragrance solution must be impregnated into the sheet block B, which is more difficult to impregnate with the solution compared to a single base paper sheet S. Therefore, neither of these is desirable.

[0055] Furthermore, the specific impregnation amount is preferably 1.5g to 3.0g per sheet block B.

[0056] Fragrance solution C2 is a fragrance-containing solution, and for example, it includes water, fragrance, and surfactant.

[0057] The fragrance content in fragrance solution C2 can be significantly adjusted, and is preferably between 0.1% by mass and 30.0% by mass. Examples of fragrances that can be used include rose oil, spearmint oil, and L-citronellal. Furthermore, the surfactant content in the fragrance solution C2 is preferably between 1.0% by mass and 70.0% by mass. While there are no specific requirements for the surfactant, nonionic surfactants are highly versatile, and examples include higher alcohol-based nonionic surfactants and alkylphenol-based surfactants.

[0058] If the toilet cleaner does not contain fragrance, the supply of fragrance solution C2 from the fragrance solution tank 182 to the fragrance solution spray nozzle 181 can be stopped, and the sheet block B formed by stacking the base paper sheets S in step S5 will be transported directly to the packaging device 190 by the second conveyor 170 without going through the impregnation of fragrance solution C2 in step S6. This makes it possible to manufacture an unscented toilet cleaner.

[0059] Furthermore, the fragrance solution C2 may contain a masking fragrance intended to mask odors derived from the raw materials (for example, chemical odors such as solvents), rather than a fragrance intended to impart a pleasant scent to the toilet cleaner. As described above, such a masking fragrance is also included in the fragrance of this embodiment. By using masking fragrances in this way, it is possible to manufacture unscented toilet cleaners.

[0060] The most preferred method for impregnating the base paper sheet S with the fragrance solution C2 is spray application using a spray nozzle as described above, but the method is not limited to this, as long as it can impregnate the sheet with the fragrance solution C2 in an appropriate amount. For example, impregnation may be carried out by methods such as nozzle impregnation or roll transfer, as long as it can impregnate the sheet with the fragrance solution C2 in an appropriate amount.

[0061] [(7) Step S7: Packaging Process] Next, the packaging device 190 of the toilet cleaner manufacturing system 100 packages sheet block B. The specific packaging method is not limited as long as it can suppress the volatilization of the unscented liquid C1 and the scented liquid C2 and prevent the sheet block B from drying out.

[0062] [2. Explanation of Effects] According to this embodiment, the unscented chemical solution C1 impregnated in step S4 does not contain fragrance, and only the scented chemical solution C2 impregnated in step S6 contains fragrance. Furthermore, if the toilet cleaner is impregnated with a fragrance solution C2 containing a fragrance other than a masking fragrance in step S6, a scented toilet cleaner can be produced; if the toilet cleaner is not impregnated with the fragrance solution C2 in step S6, an unscented toilet cleaner can be produced; and if the toilet cleaner is impregnated with a fragrance solution C2 containing a masking fragrance in step S6, an unscented toilet cleaner can be produced.

[0063] As a result, even when manufacturing unscented or fragrance-free toilet cleaners using the same toilet cleaner manufacturing system 100 after manufacturing scented toilet cleaners, the need to perform cleaning or other operations to remove fragrance components is limited to the parts of the toilet cleaner manufacturing system 100 used from step S6 onward (second conveyor 170, fragrance chemical impregnation device 180, and packaging device 190), and it is not necessary to perform operations to remove fragrance components in the parts used in earlier processes.

[0064] Furthermore, although it is necessary to add a second conveyor 170 and a fragrance liquid impregnation device 180 to the conventional manufacturing line, these are the only pieces of equipment that need to be added, and it is not necessary to expand the entire manufacturing line.

[0065] Therefore, by limiting the scope of work required to remove fragrance components and using the same production line (the same toilet cleaner production system 100), it becomes possible to manufacture both scented and unscented toilet cleaners while suppressing increases in manufacturing costs. Furthermore, the fact that there is no need to change the base fragrance-free chemical solution C1 is advantageous in keeping manufacturing costs down compared to cases where the entire chemical solution used for impregnation needs to be switched.

[0066] Furthermore, according to this embodiment, the fragrance-free chemical impregnation step (step S4), in which the base paper sheet S is impregnated with the fragrance-free chemical solution C1, is performed on the base paper sheet S before going through the lamination step (step S5), and the fragrance chemical impregnation step (step S6), in which the base paper sheet S is impregnated with the fragrance chemical solution C2, is performed on the sheet block B after going through the lamination step (step S5).

[0067] When impregnating a sheet block B, which is made by stacking multiple base paper sheets S, with a large amount of chemical solution, the impregnation takes time, necessitating a slower line (slowering down the speed of conveyors, etc.). Therefore, for example, if all the chemical solution is to be impregnated after the stacking process in step S5, the impregnation takes time, reducing the production speed and leading to increased production costs. In contrast, according to this embodiment, as described above, the fragrance-free chemical impregnation process is performed on the base paper sheet S before lamination, and only the fragrance chemical impregnation process is performed on the sheet block B after lamination. Compared to the case where all chemicals are impregnated after the lamination process in step S5, the amount of chemicals that need to be impregnated into the sheet block B is reduced. This reduces the need to slow down the line during impregnation and also reduces the risk of increased manufacturing costs due to a decrease in manufacturing speed.

[0068] [3 Variations] The following describes some modified examples of this embodiment.

[0069] [(1) Multiple impregnation with fragrance solution] In the above description of the manufacturing method, we described a case where the toilet cleaner manufacturing system 100 is equipped with only one set of fragrance liquid impregnation device 180 (fragrance liquid spray nozzle 181, fragrance liquid tank 182, and fragrance liquid piping 183) for impregnating the sheet block B with fragrance liquid C2, and impregnation with fragrance liquid C2 is performed at only one location on the second conveyor 170. However, as shown in Figure 3, the toilet cleaner manufacturing system 100A is equipped with two sets of these, that is, Alternatively, the system may be equipped with a first fragrance solution impregnation device 180A comprising a first fragrance solution spray nozzle 181A, a first fragrance solution tank 182A, and a first fragrance solution piping 183A, and a second fragrance solution impregnation device 180B comprising a second fragrance solution spray nozzle 181B, a second fragrance solution tank 182B, and a second fragrance solution piping 183B, so that the fragrance solution impregnation process of step S6 can be performed at two locations on the second conveyor 170.

[0070] In this case, as shown in Figure 3, by storing fragrance solutions containing different fragrances (referred to as the first fragrance solution C2A and the second fragrance solution C2B) in the first fragrance solution tank 182A and the second fragrance solution tank 182B, it becomes possible to impregnate with two types of fragrances in step S6 when using both the first fragrance solution impregnation device 180A and the second fragrance solution impregnation device 180B.

[0071] Furthermore, when using only either the first fragrance solution impregnation device 180A or the second fragrance solution impregnation device 180B, in step S6, it becomes possible to switch the type of fragrance added to the sheet block B from two types (first fragrance solution C2A and second fragrance solution C2B) without having to perform any work to remove fragrance components such as washing on the fragrance solution impregnation device.

[0072] Alternatively, the first fragrance solution C2A and the second fragrance solution C2B may be the same, and the first fragrance solution tank 182A and the second fragrance solution tank 182B may be used to store fragrance solutions containing the same fragrance. In this case, the first fragrance and the second fragrance in the present invention will be the same, and the first fragrance solution and the second fragrance solution will be the same. This makes it possible to increase the amount of a single fragrance solution impregnated without reducing the speed of the second conveyor 170 by using both the first fragrance solution impregnation device 180A and the second fragrance solution impregnation device 180B.

[0073] Furthermore, when both the first fragrance solution impregnation device 180A and the second fragrance solution impregnation device 180B are provided, the spray nozzles for the first fragrance solution 181A and the spray nozzles for the second fragrance solution 181B may be configured to spray the solutions from different angles. Figure 3 illustrates the case where the spray nozzle 181A for the first fragrance solution sprays the first fragrance solution C2A from directly above, and the spray nozzle 181B for the second fragrance solution sprays the second fragrance solution C2B from diagonally above.

[0074] This allows the sheet block B to be impregnated with two types of fragrance solutions in different proportions depending on its position. For example, by having the first fragrance solution spray nozzle 181A spray the first fragrance solution C2A from directly above, and the second fragrance solution spray nozzle 181B spray the second fragrance solution C2B from diagonally above and to the side of the sheet block B in the direction of movement, it is possible to ensure that the first fragrance solution C2A is more heavily impregnated into the upper surface of the sheet block B, and the second fragrance solution C2B is more heavily impregnated into the side surface of the sheet block B.

[0075] Furthermore, it is possible to provide three or more sets of fragrance liquid impregnation devices so that the fragrance liquid impregnation process of step S6 can be performed at three or more locations on the second conveyor 170. In this case, it is possible to switch between three or more types of fragrances added to the sheet block B without impregnating it with three or more types of fragrances in step S6, or without performing operations such as washing to remove fragrance components from the fragrance solution impregnation device, and without reducing the progress speed of the second conveyor 170, and to further increase the amount of a single fragrance solution impregnated.

[0076] [(2) Separation of lines based on the presence or absence of fragrance solution impregnation] In the above description of the manufacturing method, the toilet cleaner manufacturing system 100 was described in a case where the sheet blocks B are transported on the same second conveyor 170 whether or not impregnation with the fragrance solution C2 is performed in step S6. However, two sets of second conveyors 170 and packaging devices 190 may be provided, so that the line is separated into two parts after the stacking device 160.

[0077] In this case, although the scale of the production equipment will be increased, by installing a fragrance liquid impregnation device 180 on only one of the second conveyors 170, and using the second conveyor 170 and the subsequent packaging device 190 when impregnating with the fragrance liquid C2, and using the other second conveyor 170 and the subsequent packaging device 190 when not impregnating with the fragrance liquid C2, it becomes possible to manufacture both scented toilet cleaner and unscented or fragrance-free toilet cleaner without having to perform work to remove fragrance components from the parts used from step S6 onward.

[0078] Alternatively, fragrance liquid impregnation devices 180 may be installed on both second conveyors 170, and only one of the fragrance liquid impregnation devices 180 may be used.

[0079] Furthermore, three or more sets of the second conveyor 170 and packaging device 190 may be provided so that the line is separated into three or more sections after the stacking device 160.

[0080] In this case, for example, by not impregnating the first second conveyor 170 with the fragrance solution, impregnating the second second conveyor 170 with the first fragrance solution C2A, and impregnating the third second conveyor 170 with the second fragrance solution C2B, it becomes possible to manufacture three types of toilet cleaners—unscented, impregnated with the first fragrance solution C2A, and impregnated with the second fragrance solution C2B—without having to perform any work to remove the fragrance components from the parts used in step S6 and beyond.

[0081] [(3) Changes in the use of wet wipes] In the above explanation of the manufacturing method, we described the manufacturing of toilet cleaner used for cleaning toilets as an example of a wet wipe. However, the wet wipes to be manufactured are not limited to toilet cleaners; it is possible to manufacture wet wipes for other uses through the same process. For example, by using the same manufacturing method as described above when manufacturing floor cleaning sheets used for cleaning floors, kitchen cleaning sheets used for cleaning kitchens, and antiperspirant sheets for wiping the skin, it becomes possible to manufacture both scented and unscented or fragrance-free sheets for these types of wet wipes while suppressing increases in manufacturing costs. [Explanation of symbols]

[0082] 100, 100A Toilet Cleaner Manufacturing System (Wet Wipe Manufacturing System) 150 Fragrance-free chemical solution impregnation device (fragrance-free chemical solution impregnation means) 160 Stacking apparatus (stacking means) 180 Fragrance solution impregnation device (fragrance solution impregnation means) 180A First fragrance solution impregnation apparatus (fragrance solution impregnation means, first fragrance solution impregnation means) 180B Second fragrance solution impregnation apparatus (fragrance solution impregnation means, second fragrance solution impregnation means) S base paper sheet C1 Fragrance-free liquid medicine C2 Fragrance Solution C2A First Fragrance Solution (Fragrance Solution) C2B Second Fragrance Solution (Fragrance Solution)

Claims

1. A fragrance-free chemical impregnation method for impregnating a base paper sheet with a fragrance-free chemical solution that does not contain fragrances, A fragrance solution impregnation means for impregnating the base paper sheet with a fragrance solution containing fragrance, Equipped with, The aforementioned fragrance liquid impregnation means is A first fragrance solution impregnation means for impregnating the base paper sheet with a first fragrance solution containing a first fragrance, A second fragrance solution impregnation means for impregnating the base paper sheet with a second fragrance solution containing a second fragrance, Includes, A wet sheet manufacturing system characterized in that the first fragrance solution impregnation means and the second fragrance solution impregnation means spray the fragrance solution onto the base paper sheet from different angles.

2. The wet sheet manufacturing system according to claim 1, characterized in that the fragrance-impregnating means impregnates the base paper sheet, which has been impregnated with the fragrance-free liquid by the fragrance-free liquid impregnation means, with the fragrance-impregnating means.

3. The system includes a lamination means for stacking multiple sheets of the aforementioned base paper, The wet wipe manufacturing system according to claim 2, characterized in that the fragrance-free chemical impregnation means impregnates the base paper sheet with the fragrance-free chemical before the base paper sheet is laminated by the laminating means, and the fragrance chemical impregnation means impregnates the base paper sheet with the fragrance chemical after the base paper sheet is laminated by the laminating means.

4. The wet wipe manufacturing system according to claim 1, characterized in that the aforementioned fragrance solution contains a masking fragrance.

5. A fragrance-free chemical solution impregnation process in which a base paper sheet is impregnated with a fragrance-free chemical solution that does not contain fragrances, A fragrance solution impregnation step in which a fragrance solution containing fragrance is impregnated into the base paper sheet, Includes, The aforementioned fragrance solution impregnation step is, A first fragrance solution impregnation step involves impregnating the base paper sheet with a first fragrance solution containing a first fragrance, A second fragrance solution impregnation step involves impregnating the base paper sheet with a second fragrance solution containing a second fragrance, Includes, A method for manufacturing wet wipes, characterized in that the first fragrance solution impregnation step and the second fragrance solution impregnation step involve spraying the fragrance solution onto the base paper sheet from different angles.

6. The method for manufacturing wet wipes according to claim 5, characterized in that the fragrance solution impregnation step impregnates the base paper sheet, which has been impregnated with the fragrance-free solution by the fragrance-free solution impregnation step, with the fragrance solution.

7. This process includes stacking multiple sheets of the aforementioned base paper, The method for manufacturing wet wipes according to claim 6, characterized in that the fragrance-free liquid impregnation step is performed before the lamination step, and the fragrance liquid impregnation step is performed after the lamination step.

8. The method for manufacturing wet wipes according to claim 5, characterized in that the aforementioned fragrance solution contains a masking fragrance.

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