Wet wipe, wet wipe package, and liquid for wet wipe

Abstract

Provided is a wet tissue from which a plurality of wet tissues are difficult to be taken out at a time. The wet tissue has the following structure. A wet tissue characterized by comprising a nonwoven fabric containing hydrophobic fibers and a liquid medicine impregnated in the nonwoven fabric, the liquid medicine containing: (i) a cationic surfactant; (ii) a low HLB surfactant having an HLB of 3.0 to 7.0; and (iii) water.

Description

Technical Field

[0001] This disclosure relates to wet wipes, wet wipe packaging, and liquid medicine for use in wet wipes. Background Technology

[0002] Wet wipes containing a nonwoven fabric and a medicinal solution impregnated in the nonwoven fabric are known.

[0003] In wet wipes, for example, as disclosed in Patent Document 1, preservatives containing iodopropynyl butylcarbamate (IPBC), which has high preservative properties, are known.

[0004] However, from a safety perspective, the use of IPBC is restricted in some countries. This is because there are concerns about allergic reactions caused by iodine.

[0005] In addition, to improve the antiseptic properties of wet wipes, wet wipes containing cationic surfactants with bactericidal properties are known.

[0006] For example, Patent Document 2 discloses a liquid skin cleanser composition (claim 1), characterized in that it contains (A) 0.005% to 3% by weight of a cationic surfactant, (B) 0.1% to 3% by weight of a nonionic surfactant, (C) 0.1% to 3% by weight of a water-soluble inorganic salt, and (D) 0.5% to 15% by weight of an alcohol.

[0007] In addition, Patent Document 2 discloses an example of wet wipes, characterized in that a skin cleanser in the form of a composition impregnated in a support (claim 4) and a liquid skin cleanser composition impregnated in a cellulose / rayon blended nonwoven fabric.

[0008] Furthermore, in paragraph

[0012] of Patent Document 2, it is disclosed that, "Furthermore, the nonionic surfactant used is preferably hydrophilic. Preferably, it is a nonionic surfactant based on griffin with an HLB of 12 to 20, particularly preferably 15 to 20, and most preferably HLB 17 to 19.5. By preparing a hydrophilic nonionic surfactant, the irritation of the cationic surfactant is particularly well mitigated."

[0009] Existing technical documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Patent Application Publication No. 2014-70044

[0012] Patent Document 2: Japanese Patent Application Publication No. 2001-187726 Summary of the Invention

[0013] The problem the invention aims to solve

[0014] The wet wipes in Patent Document 2 contain a bactericidal cationic surfactant as a preservative, and therefore do not have the concerns associated with IPBC.

[0015] The inventors of this application discovered that when the liquid skin cleansing composition described in Patent Document 2 is impregnated into a nonwoven fabric containing hydrophobic fibers to form a wet wipe package, especially a pop-up wet wipe package, the wet wipes are connected to each other by the water film of the liquid, making it easy to take out multiple wet wipes at once from the package.

[0016] Therefore, the purpose of this disclosure is to provide a wet wipe that is difficult to remove multiple wipes at once.

[0017] Solution for solving the problem

[0018] The present inventors have discovered a wet wipe characterized in that it contains a nonwoven fabric and a medicinal solution impregnated in the nonwoven fabric, the nonwoven fabric containing hydrophobic fibers, and the medicinal solution containing (i) a cationic surfactant, (ii) a low HLB surfactant having an HLB of 3.0 to 7.0, and (iii) [other ingredients].

[0019] The effects of the invention

[0020] The wet wipes disclosed herein are difficult to take out in multiple sheets at once. Attached Figure Description

[0021] Figure 1 This is a diagram illustrating the packaging body 1 of the wet wipes according to the first embodiment.

[0022] Figure 2 This is an end view of the II-II end face of the wet wipe packaging 1.

[0023] Figure 3 This is a diagram used to illustrate multiple wet wipes (9).

[0024] Figure 4 This is an end view of the packaging body 1 of the wet wipes according to the second embodiment. Detailed Implementation

[0025] Specifically, this disclosure relates to the following schemes.

[0026] [Option 1]

[0027] A wet wipe, characterized in that it comprises a nonwoven fabric and a medicinal solution impregnated in the nonwoven fabric, wherein the nonwoven fabric contains hydrophobic fibers, and the medicinal solution contains:

[0028] (i) Cationic surfactants;

[0029] (ii) Low HLB surfactants having an HLB of 3.0 to 7.0; and

[0030] (iii) Water.

[0031] In the aforementioned wipes, the solution contains cationic surfactants as preservatives. Because cationic surfactants are positively charged, solutions containing them tend to adhere more readily to the skin compared to solutions containing non-cationic surfactants, such as iodopropynyl butylcarbamate (IPBC).

[0032] On the other hand, if a solution containing cationic surfactants is used for wet wipes, there is a tendency to take out multiple wet wipes at once when taking out one.

[0033] It should be noted that, in the following text, the tendency to take out multiple wet wipes at once when taking out one wet wipe is sometimes referred to as "multiple wipes removal tendency," and the ability to take out one wet wipe at a time when taking out one wet wipe is sometimes referred to as "one-wipe removal capability."

[0034] Furthermore, the aforementioned wet wipes use nonwoven fabric containing hydrophobic fibers as the base material. Compared to wet wipes using nonwoven fabric without hydrophobic fibers, such as those using nonwoven fabric composed solely of hydrophilic fibers, wet wipes using nonwoven fabric containing hydrophobic fibers as the base material exhibit greater fluffiness and resistance to collapse. This is because, unlike hydrophilic fibers, the hydrophobic fibers retain the medication between the fibers, rather than within them.

[0035] Due to its fluffiness, for example, when wiping excrement attached to an infant's buttocks, it can eliminate the anxiety of direct contact with excrement, and due to its non-collapseability, it tends to have excellent wiping properties for dirt.

[0036] On the other hand, the inventors of this application conducted research and found that if a nonwoven fabric containing hydrophobic fibers is impregnated with a highly polar drug solution containing a highly hydrophilic surfactant (cationic surfactant and nonionic surfactant) as described in Patent Document 2, the nonwoven fabric containing low-polarity hydrophobic fibers has difficulty maintaining the highly polar drug solution. The drug solution tends to exist between the nonwoven fabrics rather than within the nonwoven fabric. When a wet wipe is taken out, the drug solution existing between the nonwoven fabrics acts as a water film that connects the wet wipes (the nonwoven fabrics) to each other, and there is a tendency to take out multiple wet wipes at once.

[0037] In the wet wipes disclosed herein, the liquid medicine contains a low-HLB surfactant having a predetermined HLB content. Therefore, the polarity of the liquid medicine is reduced, and the low-polarity liquid medicine readily integrates with the nonwoven fabric containing hydrophobic fibers as a substrate, thus easily retaining the liquid medicine within the nonwoven fabric containing hydrophobic fibers.

[0038] As a result, the liquid medicine is difficult to form a water film between the wipes, and it is difficult to take out multiple wipes at once, but the wipes can be taken out one at a time with excellent single-use performance.

[0039] [Option 2]

[0040] According to the wet wipes of Scheme 1, the cationic surfactant is a quaternary ammonium salt having an HLB of 9.0 to 15.0.

[0041] In the aforementioned wet wipes, since the cationic surfactant is a quaternary ammonium salt with a predetermined HLB, the liquid medicine is difficult to fuse with the nonwoven fabric containing hydrophobic fibers, and a water film of the liquid medicine is easily formed between the wet wipes. However, since the aforementioned liquid medicine contains a low HLB surfactant, the liquid medicine is difficult to form a water film between the wet wipes, and the wet wipes are less likely to be removed in multiple sheets, and the single-sheet removal performance is excellent.

[0042] [Option 3]

[0043] The wet wipes according to Scheme 1 or 2, wherein the cationic surfactant is selected from the group consisting of benzalkonium chloride, cetrimonium chloride, and combinations thereof.

[0044] In the aforementioned wet wipes, the cationic surfactant is a predetermined compound, therefore, the wet wipes exhibit excellent antiseptic properties. Furthermore, the aforementioned wet wipes are less prone to multiple removals, and single-sheet removal is excellent.

[0045] [Option 4]

[0046] The wet wipes according to any one of Schemes 1 to 3, wherein the liquid medicine contains the cationic surfactant at a ratio of 0.005 to 0.80% by mass.

[0047] The aforementioned wipes contain cationic surfactants at a predetermined ratio, thus enabling the wipes to reliably provide preservative protection and exhibiting excellent single-sheet dispensing ability, making it difficult to dispense multiple wipes.

[0048] [Option 5]

[0049] The wet wipes according to any one of Schemes 1 to 4, wherein the low HLB surfactant is a nonionic surfactant.

[0050] In the aforementioned wet wipes, the low-HLB surfactant is a nonionic surfactant, which allows the liquid medicine to easily blend with the nonwoven fabric containing hydrophobic fibers as the base material, and the liquid medicine is easily retained within the nonwoven fabric containing hydrophobic fibers.

[0051] As a result, the liquid medicine is difficult to form a water film between the wipes, the wipes are less likely to be removed in multiple wipes, and the single-wipe removal is excellent.

[0052] [Option 6]

[0053] The wet wipes according to any one of Schemes 1 to 5, wherein the low HLB surfactant contains a polyoxyalkylene polymer.

[0054] In the aforementioned wet wipes, because the low-HLB surfactant contains polyoxyalkylene polymers, the liquid medicine can easily blend with the nonwoven fabric containing hydrophobic fibers as the base material, and the liquid medicine can easily remain within the nonwoven fabric containing hydrophobic fibers.

[0055] As a result, the liquid medicine is difficult to form a water film between the wipes, the wipes are less likely to be removed in multiple wipes, and the single-wipe removal is excellent.

[0056] [Option 7]

[0057] According to the wet wipes of Scheme 6, the polyoxyalkylene polymer is a block copolymer having polyoxyethylene segments and polyoxypropylene segments.

[0058] In the aforementioned wet wipes, since the polyoxyalkylene polymer is a block copolymer with polyoxyethylene and polyoxypropylene segments, the liquid medicine can easily blend with the nonwoven fabric containing hydrophobic fibers as the substrate, and the liquid medicine can easily remain within the nonwoven fabric containing hydrophobic fibers.

[0059] As a result, the liquid medicine is difficult to form a water film between the wipes, the wipes are less likely to be removed in multiple wipes, and the single-wipe removal is excellent.

[0060] [Option 8]

[0061] The wet wipes according to any one of Schemes 1 to 7, wherein the liquid medicine contains the low HLB surfactant at a ratio of 0.005 to 0.85% by mass.

[0062] The aforementioned wet wipes contain a low HLB surfactant at a predetermined ratio, so the liquid can easily penetrate the nonwoven fabric as the substrate, the liquid is difficult to form a water film between the wet wipes, the wet wipes are less likely to be taken out in multiple sheets, and the single-sheet removal is excellent.

[0063] [Option 9]

[0064] The wet wipes according to any one of Schemes 1 to 8, wherein the liquid medicine does not contain diol.

[0065] In cases where the solution of wet wipes contains a low-water-soluble ingredient (e.g., a low-water-soluble preservative), the solution often contains, for example, glycol as a solubilizing agent to dissolve the low-water-soluble ingredient in water.

[0066] In the aforementioned wet wipes, since the liquid contains cationic surfactants as preservatives, the liquid does not need to contain the aforementioned dissolving agents.

[0067] Therefore, the aforementioned wet wipes are safe for pets and other animals, and can give people a sense of security.

[0068] [Option 10]

[0069] The wet wipes according to any one of Schemes 1 to 9, wherein the medicinal solution contains more than 99.0% by mass of water.

[0070] In the aforementioned wet wipes, the medicinal liquid contains a predetermined amount of water. Therefore, the wet wipes provide peace of mind for users who use the wet wipes disclosed herein on humans, pets, or other animals.

[0071] [Option 11]

[0072] The wet wipe according to any one of claims 1 to 10, wherein the nonwoven fabric comprises a first surface layer, a second surface layer constituting a surface opposite to the first surface layer, and an intermediate layer between the first surface layer and the second surface layer, the intermediate layer having a higher hydrophilicity than the first surface layer and / or the second surface layer.

[0073] In the aforementioned wet wipes, because the nonwoven fabric used as the substrate has a predetermined structure, the liquid tends to remain in the middle layer more easily than in the first and second surface layers. As a result, the wet wipes are less likely to be removed in multiple sheets, and single-sheet removal is excellent.

[0074] [Option 12]

[0075] A packaging body for wet wipes, characterized in that a plurality of wet wipes are housed inside the packaging body having a top and a bottom, the top having an opening, the plurality of wet wipes being wet wipes according to any one of embodiments 1 to 11, the plurality of wet wipes being arranged as follows: the plurality of wet wipes are stacked in a direction from the bottom to the top, and the ends of the top side of the bottom-side wet wipe located on the bottom side and the ends of the bottom side of the top-side wet wipe adjacent to its top side overlap each other in such a way that the ends of the top side of the bottom-side wet wipe are located closer to the top side than the ends of the bottom side of the top-side wet wipe.

[0076] The packaging of the aforementioned wet wipes has the same effect as Scheme 1.

[0077] [Option 13]

[0078] A medicinal liquid for use in wet wipes, characterized in that the wet wipe comprises a nonwoven fabric containing hydrophobic fibers, and the medicinal liquid contains:

[0079] (i) Cationic surfactants;

[0080] (ii) Low HLB surfactants having an HLB of 3.0 to 7.0; and

[0081] (iii) Water.

[0082] If the above-mentioned liquid is used on wet wipes made of nonwoven fabric containing hydrophobic fibers, it will have the same effect as Scheme 1.

[0083] The following provides a detailed description of the wet wipes, the packaging of the wet wipes, and the medicinal liquid used in the wet wipes.

[0084] The wet wipes disclosed herein contain a nonwoven fabric and a medicinal solution impregnated in the nonwoven fabric.

[0085] [Medicine Solution]

[0086] The above-mentioned liquid contains:

[0087] (i) Cationic surfactants;

[0088] (ii) Low HLB surfactants having an HLB of 3.0 to 7.0; and

[0089] (iii) Water.

[0090] The aforementioned cationic surfactant is a preservative agent imparted to the pharmaceutical solution and wet wipes. The cationic surfactant is preferably a quaternary ammonium salt, and more preferably a quaternary ammonium salt having an HLB of 9.0 to 15.0. This allows the pharmaceutical solution to readily adhere to the skin.

[0091] The HLB value is a value that indicates the degree of affinity of a surfactant for water and oil. It is the value calculated by the following formula (1) in "Synthesis and Application of Surfactants" (Oda Ryohei et al., Maki Shoten (1964)).

[0092] HLB value = [(ΣInorganic value) / (ΣOrganic value)] × 10 Equation (1)

[0093] It should be noted that the inorganic and organic values ​​mentioned above are based on “Organic Concept Map - Basics and Applications -” (Fujita et al., Sankyo Publishing (1985)) and “Location of Fluorine and Silicon on Organic Concept Map” (Katsura Hiroji, Oil Chemistry, 36(12), 961(1987)).

[0094] Examples of the aforementioned quaternary ammonium salts include benzalkonium chloride, cetrimonium chloride, benzyl chloride, methylbenzyl chloride, hexadecylpyridinium chloride, cetrimonium bromide, dopamine chloride, tetraethylammonium bromide, didecyldimethylammonium chloride, domiphen, dodecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, etc., with benzalkonium chloride and cetrimonium chloride being preferred.

[0095] The aforementioned solution preferably contains the aforementioned cationic surfactant at a ratio of 0.005 to 0.80% by mass, more preferably at a ratio of 0.005 to 0.2% by mass, and even more preferably at a ratio of 0.02 to 0.1% by mass. Therefore, the wet wipes can reliably exert their antiseptic properties and are less prone to being removed in multiple sheets, exhibiting excellent single-sheet removal characteristics.

[0096] The aforementioned low-HLB surfactant has an HLB content of 3.0 to 7.0, preferably 3.5 to 6.5, and more preferably 4.0 to 6.0. This allows the wet wipes of this disclosure to be dispensed in one sheet while ensuring stability in water.

[0097] As for the aforementioned low HLB surfactants, there are no particular limitations as long as they have a predetermined HLB content; for example, nonionic surfactants can be listed.

[0098] Examples of nonionic surfactants include polyoxyalkylene polymers (preferably polyoxyalkylene copolymers, more preferably polyoxyalkylene block copolymers), and their esters, ethers, etc.

[0099] As examples of the aforementioned polyoxyalkylene block copolymers, substances containing two or more polyoxyalkylene segments with different numbers of carbon atoms can be listed.

[0100] Examples of polyoxyalkylene segments include polyoxyethylene segments, polyoxypropylene segments, and polyoxybutene segments.

[0101] The aforementioned liquid solution preferably contains the aforementioned low-HLB surfactant at a rate of 0.005 to 0.85% by mass, more preferably 0.01 to 0.3% by mass, and even more preferably 0.01 to 0.1% by mass. As a result, the liquid solution easily penetrates the nonwoven fabric used as the substrate, the liquid solution is unlikely to form a water film between the wet wipes, the wet wipes are less likely to be removed in multiple sheets, and single-sheet removal is excellent.

[0102] The aforementioned solution does not contain any solvents, such as glycols or phenoxyethanol, used to dissolve the less water-soluble components in water. Therefore, the wipes disclosed herein are safe for pets and provide peace of mind to consumers.

[0103] Examples of the aforementioned diols include ethylene glycol, propylene glycol (1,2-propanediol), 1,3-propanediol, butanediol, dipropylene glycol, tripropylene glycol, and 1,2-hexanediol.

[0104] The above-mentioned liquid can contain water in any ratio.

[0105] When the above-mentioned liquid medicine contains a small amount of components other than water, the liquid medicine preferably contains more than 90.0% by mass of water, more preferably more than 95.0% by mass of water, even more preferably more than 98.0% by mass of water, and even more preferably more than 99.0% by mass of water. Therefore, the above-mentioned wet wipes can provide peace of mind for users who use the wet wipes of this disclosure on humans, pets, or other animals.

[0106] The aforementioned nonwoven fabric is the base material for wet wipes and contains hydrophobic fibers.

[0107] The wet wipes disclosed herein use a nonwoven fabric containing hydrophobic fibers as a base material, which enables the wet wipes to have a fluffy texture and resistance to collapse.

[0108] Examples of hydrophobic fibers commonly used in this art include, for example, hydrophobic fibers, preferably synthetic fibers. Examples of synthetic fibers include synthetic fibers containing a single component, such as monofilament fibers, or synthetic fibers containing multiple components, such as composite fibers.

[0109] Examples of the aforementioned components include, for example, polyolefin polymers such as polyethylene and polypropylene; polyester polymers such as terephthalate polymers such as polyethylene terephthalate (PET), polybutylene terephthalate, and polypentyl terephthalate; polyamide polymers such as nylon 6 and nylon 6,6; acrylic polymers; polyacrylonitrile polymers; and modified versions thereof.

[0110] [Nonwoven fabric]

[0111] The aforementioned nonwoven fabric preferably contains 30% or more by mass, more preferably 50% or more by mass, and even more preferably 70% or more by mass of the aforementioned hydrophobic fibers. Therefore, the wet wipes possess properties such as fluffiness and resistance to collapse.

[0112] In addition, the above-mentioned nonwoven fabric may also contain 100% by mass of the above-mentioned hydrophobic fibers.

[0113] In addition to the hydrophobic fibers mentioned above, the aforementioned nonwoven fabrics may also contain hydrophilic fibers.

[0114] Examples of the aforementioned hydrophilic fibers include cellulose-based fibers, such as pulp fibers and regenerated cellulose fibers. Examples of pulp fibers include wood pulp fibers and non-wood pulp fibers. Examples of wood pulp fibers include softwood pulp fibers and hardwood pulp fibers. Examples of non-wood pulp fibers include straw pulp fibers, bagasse pulp fibers, reed pulp fibers, kenaf pulp fibers, mulberry pulp fibers, bamboo pulp fibers, hemp pulp fibers, and cotton pulp fibers (e.g., cotton linter fibers).

[0115] Examples of the aforementioned regenerated cellulose fibers include rayon, such as viscose rayon, cellulose fiber and modal, cuprammonium rayon (also known as "cuprammonium filament") obtained from a cuprammonium salt solution of cellulose, and lyocell, which does not undergo cellulose derivatives and is obtained by organic solvent spinning using an organic solvent as a mixed solution of organic compounds and water. Examples include Tencel (trademark).

[0116] The aforementioned nonwoven fabrics can have a multilayer structure containing multiple layers with different degrees of hydrophilicity (hydrophobicity), such as a 2-layer structure, a 3-layer structure, a 4-layer structure, etc.

[0117] The aforementioned nonwoven fabric may, for example, have a three-layer structure: a first surface layer, a second surface layer constituting the surface opposite to the first surface layer, and an intermediate layer between the first surface layer and the second surface layer.

[0118] In the case where the aforementioned nonwoven fabric has a three-layer structure (first surface layer, intermediate layer, and second surface layer), it is preferable that the first and second surface layers each have higher hydrophobicity than the intermediate layer, that is, the ratio of hydrophobic fibers in the first and second surface layers is higher than that in the intermediate layer, and the intermediate layer has higher hydrophilicity than the first and second surface layers, that is, the ratio of hydrophobic fibers in the intermediate layer is lower than that in the first and second surface layers. Therefore, the liquid tends to remain in the intermediate layer more easily than in the first and second surface layers, resulting in less tendency for multiple wipes to be removed, and excellent single-wipe removal.

[0119] It should be noted that the aforementioned intermediate layer may also be composed of multiple layers having higher hydrophilicity than the first surface layer and / or the second surface layer.

[0120] In the case where the aforementioned nonwoven fabric has a three-layer structure, the first surface layer and the second surface layer each contain hydrophobic fibers at a ratio preferably 30% or more by mass, more preferably 50% or more by mass, and even more preferably 70% or more by mass. Furthermore, the first surface layer and the second surface layer each contain hydrophobic fibers at a ratio preferably 100% or less by mass, more preferably 90% or less by mass, and even more preferably 80% or less by mass. Therefore, the wet wipes are less likely to be removed in multiple sheets, and single-sheet removal is excellent.

[0121] It should be noted that if the first and second surface layers are not composed of 100% by mass hydrophobic fibers, the remaining fibers can be the aforementioned hydrophilic fibers.

[0122] When the aforementioned nonwoven fabric has a three-layer structure, the intermediate layer can contain the aforementioned hydrophobic fibers at a ratio preferably less than 30% by mass, more preferably less than 25% by mass, and even more preferably less than 20% by mass. Alternatively, the intermediate layer can contain the aforementioned hydrophilic fibers at a ratio preferably more than 70% by mass, more preferably more than 75% by mass, and even more preferably more than 80% by mass. The intermediate layer can also contain the aforementioned hydrophilic fibers at a ratio of 100% by mass. Therefore, the wet wipes are less likely to be removed in multiple sheets, and single-sheet removal is excellent.

[0123] The aforementioned nonwoven fabric can be manufactured using methods known in the art. When the nonwoven fabric is a spunlace nonwoven fabric, such as a dry-spunlace nonwoven fabric, it can be manufactured by placing a single or multiple layers of fiber webs, formed by dry spunlace, onto a support and then using a dry spunlace method that sprays high-pressure water from a nozzle onto the fiber web.

[0124] [The packaging of wet wipes]

[0125] In the packaging of the wet wipes disclosed herein, multiple wet wipes are stored inside the main body of the packaging, which has a top and a bottom, the top having an opening.

[0126] In addition, the aforementioned multiple wet wipes are arranged as follows: the multiple wet wipes are stacked in the direction from the bottom to the top, and a portion of the bottom-side wet wipe located on the bottom side and a portion of the top-side wet wipe adjacent to its top side overlap each other in such a way that a portion of the bottom-side wet wipe is located on the top side of the top side than a portion of the top-side wet wipe.

[0127] Figure 1 This is a perspective view of the packaging body 1 of the wet wipes according to Embodiment 1 of this disclosure (hereinafter referred to as "First Embodiment"). Figure 2 It is the packaging body 1 of the wet wipes. Figure 1 The end face view at end face II-II shown.

[0128] Figure 1 The packaging 1 shown is a pop-up type packaging for wet wipes, in which multiple wet wipes (not shown) are stored in a manner that allows them to be taken out sequentially from inside the packaging body 3, which has a top T and a bottom B, and the top T has an opening 5.

[0129] The main body of the packaging 3 has a seal 7 that covers the opening 5.

[0130] The main packaging unit 3 is bag-shaped. When the opening 5 is sealed by the sealing member 7, the wet wipes inside the main packaging unit 3 can be sealed to inhibit the evaporation of the medicine. Each wet wipe can be taken out through the opening 5. In order to repeatedly seal the wet wipes inside the main packaging unit 3, the sealing member 7 is coated with adhesive on the surface in contact with the main packaging unit 3.

[0131] like Figure 2 As shown, inside the main packaging 3, multiple wet wipes 9 are stacked from the top T to the bottom B. It should be noted that each wet wipe 9 has an outward three-fold (approximately Z-shaped) fold structure, which has a first fold line and a second fold line. Furthermore, the multiple wet wipes 9 are stacked such that adjacent wet wipes 9 in the thickness direction (from the top T to the bottom B) face the same direction (the first fold line overlaps with each other in the aforementioned thickness direction, and the second fold line overlaps with each other in the aforementioned thickness direction).

[0132] Figure 3 It is used to explain storage in Figure 2 The image shows multiple wet wipes 9 inside the package 1 of the wet wipes shown.

[0133] Wet wipes 9', 9”, and 9”' are stacked sequentially from top T to bottom B. In the relationship between wet wipes 9' and 9”, the top end 9”T of wet wipe 9” (bottom side wet wipe) located on the bottom B side and the bottom end 9’B of wet wipe 9' (top side wet wipe) adjacent to its top T side overlap each other in such a way that the top end 9”T of wet wipe 9” (bottom side wet wipe) is closer to the top T side than the bottom end 9’B of wet wipe 9’ (top side wet wipe).

[0134] Similarly, in Figure 3 In the relationship between wet wipe 9” and wet wipe 9”', the top end 9”'T of wet wipe 9”' (bottom side wet wipe) located on the bottom B side and the bottom end 9”'B of wet wipe 9”' (top side wet wipe) adjacent to its top T side overlap each other in such a way that the top end 9”'T of wet wipe 9”' (bottom side wet wipe) is located closer to the top T side than the bottom end 9”B of wet wipe 9”' (top side wet wipe).

[0135] By using multiple wet wipes 9 Figure 2 and Figure 3 As shown, the wipes are stacked as shown. When the wipes 9' are taken out, a portion of the wipes 9" (mainly 9"T) is pulled out and protrudes from the main body of the packaging 3, making it easy to remove the wipes 9" for the next use.

[0136] It should be noted that if the bottom end 9'B of the wet wipe 9' is connected to the top end 9"T of the wet wipe 9" using the water film of the medicine formed between the wet wipes, there is sometimes a tendency to remove multiple wet wipes 9" together when taking out the wet wipe 9'.

[0137] In the packaging 1 of the wet wipes in the first embodiment, since the wet wipes 9 are specific wet wipes, the ability to remove one sheet is excellent.

[0138] Figure 4 This is an end view of the packaging body 1 of the wet wipes according to another embodiment of this disclosure (hereinafter referred to as "the second embodiment"), which is equivalent to Figure 1 End face view of end face II-II. Figure 4 In this structure, multiple wet wipes 9 each have a four-fold (approximately Σ-shaped) fold structure formed by folding along three fold lines. Furthermore, the multiple wet wipes 9 are stacked such that the Σ-shaped structures of adjacent wet wipes 9 in the thickness direction (from top T towards bottom B) face opposite directions.

[0139] In the packaging body 1 of the wet wipes in the second embodiment, similarly to the first embodiment, the top end (not shown) of the bottom-side wet wipe (not shown) located on the bottom side and the bottom end (not shown) of the top-side wet wipe (not shown) adjacent to its top side overlap each other in such a way that the top end of the bottom-side wet wipe is located on the top side of the top side than the bottom end of the top-side wet wipe.

[0140] In the packaging 1 of the wet wipes in the second embodiment, since the wet wipes 9 are specific wet wipes, the ability to remove one sheet is excellent.

[0141] Example

[0142] The following examples illustrate this disclosure, but this disclosure is not limited to these examples.

[0143] [Manufacturing Example 1]

[0144] Prepare Drug Solution No. 1 according to the formulation shown in Table 1. It should be noted that Drug Solution No. 1, in addition to the components shown in Table 1, also contains chelating agents, pH adjusters, humectants, etc., and water is added in a manner that makes up 100 parts by weight of Drug Solution No. 1. It should also be noted that Drug Solution No. 1 does not contain diols.

[0145] [Table 1]

[0146] Table 1

[0147]

[0148] The HLB of benzalkonium chloride is 9.2, and the HLB of cetrimonium chloride is 9.8.

[0149] The low-HLB surfactant has an HLB of 4.0.

[0150] [Manufacturing Example 2]

[0151] Except for changing the low-HLB surfactant to a surfactant with an HLB of 8.4, pharmaceutical solution No. 2 was manufactured in the same manner as in manufacturing example 1.

[0152] [Manufacturing Example 3]

[0153] Except for changing the low HLB surfactant to 0.005 parts by weight of NIKKOL BT-12, pharmaceutical solution No. 3 was manufactured in the same manner as in Manufacturing Example 1. It should be noted that NIKKOL BT-12 is a polyoxyethylene alkyl (12-14) ether (12E.O.) manufactured by Nikko Chemical Co., Ltd. (cosmetic display name: (C12-14)Pareth-12), with an HLB of 14.5.

[0154] [Manufacturing Example 4]

[0155] Nonwoven fabric No. 1 with a three-layer structure consisting of a first surface layer and a second surface layer containing more than 50% by mass of hydrophobic fibers and an intermediate layer containing more than 50% by mass of hydrophilic fibers is formed by dry hydroentangling.

[0156] Nonwoven fabric No.1 is cut into 200mm × 140mm (take-out direction × width direction). As shown in the second embodiment, 80 sheets of the cut nonwoven fabric No.1 are stacked together, and the 80 stacked sheets are packaged in a packaging body to form a wet wipe package (excluding liquid medicine).

[0157] [Example 1, and Comparative Example 1 and Comparative Example 2]

[0158] Medicine solution No. 1 and medicine solution No. 3 were filled into the packaging body of the wet wipes (excluding the medicine solution) at a ratio of 260% by mass of the medicine solution to the nonwoven fabric, thus creating packaging body No. 1 and packaging body No. 3 respectively. Next, packaging body No. 1 and packaging body No. 3 were left to stand for 1 week each.

[0159] In packages No. 1 and No. 3, the removability and removal height of multiple sheets were evaluated, respectively. The test methods are described below. The results are shown in Table 2.

[0160] In addition, the diffusion lengths of drug solutions No.1 to No.3 were evaluated respectively.

[0161] It should be noted that regarding the multiple sheet removal and removal height, tests were conducted on three different packages in Package No. 1 and Package No. 3, and the average value was used.

[0162] [Multiple image extraction]

[0163] Each time one wet wipe is taken out from the packaging, when taking out the nth wet wipe (from top to bottom, 1, 2, ..., n, ..., 80), the number of wet wipes that are pulled out together by the nth wet wipe (the wet wipe taken out directly) is counted (wet wipes that are taken out "indirectly" as a whole).

[0164] For example, when the nth wet wipe is taken out, if the (n+1)th wet wipe located 1 below it is pulled out together with the nth wet wipe, the wet wipe that is indirectly taken out "as a whole" is counted as 1 wipe.

[0165] Additionally, when the nth wet wipe is taken out, if the (n+1)th wet wipe located 1 below is pulled by the nth wet wipe and taken out together as a whole, and the (n+2)th wet wipe located 2 below is pulled by the (n+1)th wet wipe and taken out together as a whole, the number of wet wipes taken out indirectly "as a whole" is counted as 2.

[0166] The experiment continued until all 80 wipes were removed. The total number of wipes removed indirectly "as a whole" was counted as m, which is taken as the number of wipes removed (sheets).

[0167] [Retrieve Height]

[0168] Each time one wet wipe is taken out from the packaging, when the nth wet wipe (from top to bottom, 1, 2, ..., n, ..., 80) is taken out, the length of the wet wipe that was pulled out along with a part of the wet wipe (the wet wipe that was taken out indirectly) is measured (the length from the edge of the wet wipe to the opening). The average value of the whole is taken out as the height.

[0169] It should be noted that in the measurement of the height removed, the wet wipes that were removed indirectly "as a whole" were ignored.

[0170] [Diffusion Length]

[0171] Cut the nonwoven fabric No.1 to the predetermined size, overlap 4 sheets, and paste them onto a board with an inclination angle of 52.5 degrees.

[0172] Using a pipette, 180 μL of the drug solution (Drug Solution No. 1 to Drug Solution No. 3) was dropped onto nonwoven fabric No. 1 from a height of 10 mm. The length of the drug solution flowing on the surface of nonwoven fabric No. 1 was measured, and the average of 10 measurements was taken as the diffusion length. The results are shown in Table 2.

[0173] [Table 2]

[0174] Table 2

[0175] Example 1 Comparative Example 1 Comparative Example 2 medicine No.1 No.2 No. 3 HLB with low HLB surfactant 4.0 8.4 14.5 Multiple extractions / sheet 12.0 - 20.5 Take out the height / mm 93.7 - 115.5 Diffusion length / mm 14.7 18.7 30.3

[0176] Explanation of reference numerals in the attached figures

[0177] 1. Packaging body of wet wipes; 3. Main body of packaging; 5. Opening; 7. Sealing element; 9. Wet wipes.

Claims

1. A wet wipe, characterized in that, It contains a nonwoven fabric and a medicinal solution impregnated in the nonwoven fabric. The nonwoven fabric contains more than 50% by weight of hydrophobic fibers. The medicinal solution contains: (i) 0.02~0.20% by mass of cationic surfactants; (ii) 0.085 to 0.3% by mass of a low-HLB surfactant having an HLB content of 3.0 to 4.0; and (iii) Water, The cationic surfactant is selected from the group consisting of benzalkonium chloride, cetrimonium chloride, and combinations thereof. The low HLB surfactant contains a polyoxyalkylene polymer. The polyoxyalkylene polymer is a block copolymer having polyoxyethylene segments and polyoxypropylene segments.

2. The wet wipe according to claim 1, wherein, The cationic surfactant is a quaternary ammonium salt having an HLB of 9.0 to 15.

0.

3. The wet wipes according to claim 1 or 2, wherein, The low HLB surfactant is a nonionic surfactant.

4. The wet wipes according to claim 1 or 2, wherein, The solution does not contain diol.

5. The wet wipes according to claim 1 or 2, wherein, The liquid contains more than 99.0% by mass of water.

6. The wet wipes according to claim 1 or 2, wherein, The nonwoven fabric comprises a first surface layer, a second surface layer constituting the surface opposite to the first surface layer, and an intermediate layer between the first surface layer and the second surface layer, the intermediate layer having a higher hydrophilicity than the first surface layer and / or the second surface layer.

7. A packaging body for wet wipes, characterized in that, Multiple wet wipes are stored inside the main packaging body, which has a top and a bottom, with an opening at the top. The plurality of wet wipes are wet wipes according to any one of claims 1 to 6. The multiple wet wipes are configured such that the multiple wet wipes are stacked in the direction from the bottom to the top, and the top side end of the bottom side wet wipe located on the bottom side and the bottom side end of the top side wet wipe adjacent to its top side overlap each other in such a way that the top side end of the bottom side wet wipe is located closer to the top side than the bottom side end of the top side wet wipe.

8. A medicinal solution for wet wipes, characterized in that, This wet wipe is made of a nonwoven fabric containing hydrophobic fibers. The medicinal solution contains: (i) 0.02~0.20% by mass of cationic surfactants; (ii) 0.085 to 0.3% by mass of a low-HLB surfactant having an HLB content of 3.0 to 4.0; and (iii) Water, The cationic surfactant is selected from the group consisting of benzalkonium chloride, cetrimonium chloride, and combinations thereof. The low HLB surfactant contains a polyoxyalkylene polymer. The polyoxyalkylene polymer is a block copolymer having polyoxyethylene segments and polyoxypropylene segments.

Images