CN114502052A

CN114502052A - Wiping material

Info

Publication number: CN114502052A
Application number: CN202080069281.XA
Authority: CN
Inventors: 别所直人; 小岛宏纪; 石塚仁
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2019-10-25
Filing date: 2020-10-14
Publication date: 2022-05-13
Anticipated expiration: 2040-10-14
Also published as: WO2021079798A1; CN114502052B; JP2021070815A

Abstract

The present invention relates to a wiping material comprising a nonwoven fabric and an aqueous composition supported on the nonwoven fabric, wherein the aqueous composition contains (a) a cationic surfactant, (b) an inorganic salt which is formed from a cation and an anion, the cation being a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion being a divalent ion, (c) a nonionic surfactant, and water, and the molar ratio of the content of the divalent ion based on the component (b) to the content of the component (a) (content of the divalent ion)/((content of the component (a)) in the aqueous composition is 0.4 to 40 inclusive.

Description

Wiping material

Technical Field

The present invention relates to a wiping material.

Background

For sheet-like wiping materials such as cleaning sheets and disinfecting sheets, an aqueous composition containing a cationic surfactant is used for the purpose of imparting a disinfecting effect. In such an aqueous composition, a nonionic surfactant may be used in combination in order to improve detergency and the effect of a cationic surfactant.

Jp 2019 a-112342 a discloses a cleaning sheet in which a liquid-retentive substrate sheet is impregnated with an aqueous disinfectant, wherein the aqueous disinfectant contains a quaternary ammonium salt surfactant as a component (a), potassium hydroxide as a component (B), an aminocarboxylic acid type chelating agent as a component (C), and water as a component (D), the pH of the aqueous disinfectant impregnated in the substrate sheet is 10.5 or more and 13.5 or less, and the substrate sheet contains at least one selected from the group consisting of regenerated fibers, synthetic fibers, and natural fibers.

Further, Japanese patent application laid-open No. 2017-110323 discloses a bactericidal cleaning article obtained by impregnating a liquid cleansing composition with a cellulose fiber having a weight per unit area of 20 to 120g/m, the weight per unit area being 80 mass% or more²The bactericidal cleaning article according to (1), wherein the liquid cleansing composition contains 0.01 to 0.50% by mass of the organic acid (a), 0.1 to 1.0% by mass of the surfactant (b), and 0.5 to 5.0% by mass of the divalent or higher metal ion compound (c).

Jp 2018 a-90564 discloses a cleaning sheet in which a liquid-retentive substrate sheet is impregnated with an aqueous disinfectant containing a quaternary ammonium salt surfactant as a component (a), at least one member selected from inorganic electrolytes, organic acids and organic acid salts as a component (B), an aminocarboxylic acid type chelating agent as a component (C), and water as a component (D), wherein the pH of the aqueous disinfectant impregnated in the substrate sheet is 4.8 or more and 8.0 or less, and the substrate sheet contains at least one member selected from regenerated fibers, synthetic fibers and natural fibers.

Disclosure of Invention

Such a wiping material is expected to contain a cationic surfactant to impart a bactericidal effect or the like when applied to an object. However, even when a predetermined amount of the cationic surfactant is added to the chemical solution, the amount of the cationic surfactant applied to the object tends to decrease. This is because the adsorption of the cationic surfactant to the nonwoven fabric proceeds over time from the time immediately after the nonwoven fabric is impregnated with the chemical solution to the time taken for the chemical solution to take several days. Further, there is also a problem that adsorption of a nonionic surfactant advances in conjunction with a cationic surfactant in a chemical solution containing a nonionic surfactant which is expected to improve detergency and antibacterial properties by being used in combination with a cationic surfactant.

The invention provides a wiping material which fully exerts the effects of a cationic surfactant and a nonionic surfactant on an object to be wiped.

The present invention relates to a wiping material comprising a nonwoven fabric and an aqueous composition carried on the nonwoven fabric, the aqueous composition comprising (a) a cationic surfactant [ hereinafter referred to as component (a) ], (b) an inorganic salt [ hereinafter referred to as component (b) ], wherein the cation is a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion is a divalent ion, and (c) a nonionic surfactant [ hereinafter referred to as component (c) ], and water,

the molar ratio of the content of divalent ions based on component (b) to the content of component (a) (content of divalent ions)/((content of component (a)) in the aqueous composition is 0.4 to 40.

The present invention also relates to a wiping method for wiping an object with the wiping material of the present invention.

The present invention also relates to an adsorption inhibiting method for inhibiting adsorption of a component (a) and a component (c) onto a nonwoven fabric when an aqueous composition containing the component (a) and the component (c) is brought into contact with the nonwoven fabric,

an inorganic salt [ hereinafter referred to as component (b) ] composed of a cation and an anion, wherein the cation is a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion is a divalent ion, is further added to the aqueous composition so that the molar ratio (content of divalent ion)/((content of component (a)) of the divalent ion content of component (b) to the content of component (a)) is 0.4 to 40 inclusive.

According to the present invention, there is provided a wiping material which exerts the effects of a cationic surfactant and a nonionic surfactant sufficiently on an object to be wiped.

Detailed Description

The present inventors investigated the cause of the unexpected bactericidal effect obtained when an aqueous composition containing a cationic surfactant and a nonionic surfactant is supported on a nonwoven fabric, and as a result, found that the cause is a decrease in the concentration of the cationic surfactant and the nonionic surfactant that are brought into contact with an object by adsorption to the nonwoven fabric. Further, it has been found that adsorption of a cationic surfactant and a nonionic surfactant to a nonwoven fabric can be suppressed by using an inorganic salt containing a specific ion as the component (b) under specific conditions for the cationic surfactant and the nonionic surfactant.

[ wiping Material ]

The wiping material of the present invention comprises a nonwoven fabric and an aqueous composition (hereinafter also referred to as the aqueous composition of the present invention) supported on the nonwoven fabric, the aqueous composition containing component (a), component (b), component (c) and water, and the molar ratio (content of divalent ion)/((content of component (a)) of the divalent ion content of component (b) to the content of component (a)) is 0.4 to 40 inclusive.

< aqueous composition >

The aqueous composition of the present invention contains component (a), component (b), component (c) and water.

Examples of the cationic surfactant as the component (a) include an N-alkylpyridinium salt surfactant and a quaternary ammonium salt surfactant. In the present invention, component (a) is preferably a quaternary ammonium salt surfactant, more preferably a compound represented by the following general formula (a1), and still more preferably a compound represented by the following general formula (a 1-1).

[ chemical formula 1]

[ in the formula, R¹～R⁴Each independently represents an alkyl group having 1 to 20 carbon atoms. Wherein R is¹～R⁴The number of carbon atoms in any one of the above is 8 or more and 20 or less. X^-Represents a counter ion. Angle (c)

In the general formula (a1), R¹～R⁴At least two of them may be bonded to each other to form a ring. In addition, these alkyl groups may be substituted with hydroxyl, alkoxy, acyloxy, acylamino, aryl.

R¹～R⁴Examples of the alkyl group in (1) include straight-chain or branched alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, pentyl, hexyl, octyl, 2-ethylhexyl, decyl, dodecyl, pentadecyl, hexadecyl and octadecyl.

The number of carbon atoms of the alkoxy group which may be substituted with an alkyl group is preferably 2 to 18, and may be a polyalkyleneoxy group. Examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, a 2-ethylhexyloxy group, a decyloxy group, an octadecyloxy group, a hexadecyloxy group, a methoxypolyethyleneoxy group, a 2-ethylhexyloxypolyethyleneoxy group and a dodecyloxypolypropyleneoxy group.

The carbon number of the acyloxy group which may be substituted with an alkyl group is preferably 2 or more, more preferably 8 or more, and preferably 18 or less, more preferably 16 or less. Examples of the acyloxy group include an acetoxy group, a propionyloxy group, a valeryloxy group, a pivaloyloxy group, an octanoyloxy group, a lauroyloxy group, a myristoyloxy group, a palmitoyloxy group, and a stearoyloxy group.

The carbon number of the acylamino group which may be substituted with the alkyl group is preferably 2 or more, more preferably 8 or more, and preferably 18 or less, more preferably 16 or less. Examples of the acylamino group include acetylamino group, propionylamino group, pentanoylamino group, pivaloylamino group, octanoylamino group, lauroylamino group, myristoylamino group, palmitoylamino group, and stearoylamino group.

The aryl group which may be substituted with an alkyl group is preferably an aryl group having 6 to 20 carbon atoms, and examples thereof include a phenyl group and a naphthyl group, and a phenyl group is particularly preferable.

R¹～R⁴The alkyl group in (2) is preferably a linear alkyl group, and when the alkyl group has the above substituent, the carbon number of the alkyl group itself is preferably 1 or more and 4 or less, more preferably 1 or 2.

R¹～R⁴The ring formed by bonding at least two of them to each other is preferably a 5-or 6-membered ring, and examples thereof include pyrrolidine, piperidine, piperazine, morpholine, thiomorpholine, quinuclidine and 1, 4-diazabicyclo [2,2]Octane, imidazole.

The compound represented by the formula (a1) is preferably R¹Is an alkyl group having 8 to 20 carbon atoms, R²And R⁴Is alkyl with carbon number more than 1 and less than 3, R³A compound having an alkyl group having 1 to 10 carbon atoms.

X^-Examples include inorganic or organic carboxylate ions, sulfonate ions, halide ions, preferably chloride ions, bromide ions, more preferably chloride ions.

[ chemical formula 2]

[ in the formula, R¹¹Represents an alkyl group having 8 to 20 carbon atoms, R¹²And R¹³Each independently represents an alkyl group having 1 to 3 carbon atoms. L represents an alkylene group having 1 to 4 carbon atoms, and Ar represents an aryl group. X^-Represents a counter ion. Angle (c)

R¹¹And R in the general formula (a1)¹Are synonymous, as are preferred ranges. Except for the difference in carbon number, R¹²And R¹³Are each independently of R in the general formula (CS)²Are used in the same sense and are intended to be synonymous,the preferred ranges are also the same.

Examples of the alkylene group having 1 to 4 carbon atoms in L include a methylene group, an ethylene group, a propylene group, and a butylene group, with a methylene group and an ethylene group being preferred, and a methylene group being more preferred.

The carbon number of the aryl group in Ar is preferably 6 or more, and preferably 10 or less, more preferably 8 or less, and further preferably 6. Examples of the aryl group include a phenyl group and a naphthyl group.

The aryl group may have a substituent, and examples of the substituent include an alkyl group, an alkoxy group, an alkylthio group, a hydroxyl group, and a halogen atom.

X^-And X in the general formula (a1)^-Are synonymous, as are preferred ranges.

The compound represented by the formula (a1-1) is preferably R¹¹Is unsubstituted alkyl with more than 8 and less than 20 carbon atoms, R¹²And R¹³A compound which is an unsubstituted alkyl group having 1 to 3 carbon atoms, L is a methylene group, and Ar is a phenyl group which may have a substituent.

The quaternary ammonium salt surfactant may be a mixture of compounds in which a part of alkyl groups is an alkyl group having different carbon numbers.

Examples of the cationic surfactant of component (a) include lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium bromide, myristyl trimethyl ammonium bromide, alkylbenzyl dimethyl ammonium chloride having 8 or more and 18 or less carbon atoms, stearylphenylethyl dimethyl ammonium chloride, lauryl trihydroxymethyl ammonium chloride, and N-dodecylpyridinium chloride, and alkylbenzyl dimethyl ammonium chloride having 8 or more and 18 or less carbon atoms is preferable.

The aqueous composition of the present invention contains the component (a) preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and even more preferably at least 0.2% by mass, and preferably at most 5% by mass, more preferably at most 2% by mass, and even more preferably at most 0.5% by mass. The mass% of the component (a) is defined by the mass% of the component (a)The counter anion of (2) is chloride (Cl)^-) The content in the case of (b), i.e., the content based on the chloride conversion. Hereinafter, the same applies to the mass ratio.

In the present invention, since adsorption of the component (a) and the component (c) to the nonwoven fabric can be suppressed by using the component (b) in combination with the component (a) and the component (c), the amount of the component (a) and the component (c) can be significantly reduced as compared with the case where the component (b) is not used.

(b) The component (A) is an inorganic salt which is formed from a cation and an anion, the cation is a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion is a divalent ion. (b) The ingredient may be a hydrate.

(b) The component (b) is preferably an inorganic salt selected from inorganic salts formed from monovalent ions and divalent ions and inorganic salts formed from divalent ions, and more preferably an inorganic salt formed from monovalent ions and divalent ions. That is, as the component (b), inorganic salts selected from inorganic salts in which the cation is a monovalent ion and the anion is a divalent ion, inorganic salts in which the cation is a divalent ion and the anion is a monovalent ion, and inorganic salts in which both the cation and the anion are divalent ions are exemplified. In the present invention, the total of the molar amount of the divalent cation and the molar amount of the divalent anion is used for the inorganic salt in which both the cation and the anion are divalent ions based on the content of the divalent ion in the component (b).

Examples of the element in group 1 of the periodic table include lithium, sodium, potassium, rubidium, cesium, and francium.

The elements of group 1 of the periodic Table are preferably lithium, sodium or potassium.

Examples of the group 2 element of the periodic Table of the elements include beryllium, magnesium, calcium, strontium, barium and radium.

The elements of group 2 of the periodic table are preferably magnesium and calcium.

(b) In the component (a), at least one of the cation and the anion is a divalent ion. (b) In the component (b), both the cation and the anion may be divalent ions, and it is preferable that inorganic salts containing these ions have high water solubility.

Among the divalent ions, examples of the divalent anion include sulfide ion, carbonate ion, sulfate ion, sulfite ion, selenate ion, selenite ion, and thiosulfate ion.

(b) The component (a) preferably contains one or more ions selected from calcium ions, magnesium ions, sulfate ions and sulfite ions as inorganic salts of divalent ions.

(b) The component (C) is selected from inorganic compounds such as halides, sulfates, nitrates and carbonates, and preferably from inorganic compounds such as chlorides, bromides and sulfates.

Specific examples of the component (b) include calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, lithium sulfate, sodium sulfate, potassium sulfate, magnesium sulfate, sodium sulfite, and magnesium sulfite.

In the present invention, the component (b) is preferably a compound having a solubility in water at 20 ℃ of preferably 0.1g/100mL or more, more preferably 1g/100mL or more, still more preferably 10g/100mL or more, and still more preferably 20g/100mL or more.

The aqueous composition of the present invention contains the component (b) in an amount of preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and still more preferably 0.4% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 2% by mass or less. The content of divalent ions based on component (b) in the aqueous composition can be determined by ion chromatography. The amount of the component (b) may be calculated from the amount of the component (b) added in the preparation of the aqueous composition.

In the aqueous composition of the present invention, from the viewpoint of the prevention of adsorption of the component (a) and the component (c) to the nonwoven fabric and the bactericidal property, the molar ratio (content of divalent ion)/((content of component (a)) based on the content of divalent ion in the component (b) to the content of the component (a) is 0.4 or more, preferably 0.5 or more, more preferably 0.9 or more, further preferably 2.0 or more, still further preferably 4.0 or more, and 40 or less, and preferably 20 or less. The molar ratio can also be calculated from the amounts of the component (a) and the component (b) to be mixed in the preparation of the aqueous composition of the present invention.

In the present invention, the proportion of the divalent ion derived from the component (b) among the divalent ions in the aqueous composition of the present invention is preferably 50% by mass or more, more preferably 60% by mass or more, further preferably 70% by mass or more, further preferably 80% by mass or more, further preferably 90% by mass or more, and preferably 100% by mass or less, and may be 100% by mass.

The aqueous composition of the present invention contains a nonionic surfactant as the component (c). The component (c) is preferable from the viewpoint of the prevention of adsorption of the component (a) to the nonwoven fabric and the bactericidal property.

The nonionic surfactant as the component (c) is preferably a polyoxyalkylene type nonionic surfactant, and more preferably a nonionic surfactant containing an ethyleneoxy group. As the nonionic surfactant containing an ethyleneoxy group, a nonionic surfactant represented by the following general formula (c1) is preferable.

R^1c(CO)_mO－(AO)_n－R^2c (c1)

[ in the formula, R^1cIs an aliphatic hydrocarbon group having 9 to 18 carbon atoms, R^2cIs a hydrogen atom or a methyl group. CO is a carbonyl group, and m is a number of 0 or 1. The AO group is an alkyleneoxy group having 2 to 4 carbon atoms and containing an ethyleneoxy group. n is an average molar number of addition and is a number of 1 to 50. Angle (c)

In the general formula (c1), R^1cIs an aliphatic hydrocarbon group having 9 to 18 carbon atoms. R^1cHas a carbon number of 9 or more, preferably 10 or more, more preferably 11 or more, and preferably 18 or less, more preferably 16 or less, further preferably 15 or less, and further preferably 14 or less.

R^1cIs an aliphatic hydrocarbon group, preferably a group selected from alkyl and alkenyl groups.

In the general formula (c1), the AO group is an alkyleneoxy group having 2 or more and 4 or less carbon atoms and containing an ethyleneoxy group, preferably an alkyleneoxy group having 2 or more and 3 or less carbon atoms and containing an ethyleneoxy group, and more preferably an ethyleneoxy group. The AO group can be an alkyleneoxy group containing ethyleneoxy groups and other alkyleneoxy groups such as propyleneoxy groups. The other alkyleneoxy group is preferably propyleneoxy. In the case where the AO group contains an ethyleneoxy group and a propyleneoxy group, the ethyleneoxy group and the propyleneoxy group may be a block type bonding or a random type bonding.

In the general formula (c1), n is the number average addition mole number of AO groups and is a number of 1 to 50. n is 1 or more, preferably 2 or more, more preferably 3 or more, and 50 or less, preferably 40 or less, more preferably 30 or less, further preferably 20 or less, further preferably 10 or less, further preferably 8 or less, further preferably 7 or less, further preferably 6 or less.

Specific examples of the nonionic surfactant having no polyoxyethylene group include at least one selected from the group consisting of sucrose fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, alkyl glycosides and glyceryl monoethers.

The component (c) is preferably a nonionic surfactant having HLB of less than 12.5 from the viewpoints of bactericidal properties when coexisting with the component (a) and wettability to the surface of an object. That is, the aqueous composition of the present invention preferably contains a nonionic surfactant having HLB of less than 12.5 as the component (c). Here, in the case of a nonionic surfactant having a polyoxyethylene group, the HLB of the component (c) is determined by Griffin (Griffin) method represented by the following general formula (I).

HLB value [ ((molecular weight of polyoxyethylene portion of component (c)/((molecular weight of component (c)) ].times.20 (I) ]

The molecular weight of the polyoxyethylene moiety in the component (c) is calculated using the average number of moles of polyoxyethylene added.

As described above, from the viewpoints of bactericidal properties in the coexistence with the component (a) and wettability to the surface of an object, a nonionic surfactant having a low HLB, for example, a nonionic surfactant having an HLB of less than 12.5, is a preferable component, but when used together with a cationic surfactant, it tends to be easily adsorbed to a nonwoven fabric. In the present invention, since adsorption to a nonwoven fabric can be suppressed even with such a nonionic surfactant, the effects expected by using a nonionic surfactant having a low HLB are sufficiently exhibited on an object.

The nonionic surfactant having HLB of less than 12.5 is preferably 8 or more, and is less than 12.5, preferably 12 or less, more preferably 11 or less, and further preferably 10 or less, from the viewpoints of bactericidal properties when coexisting with the component (a) and wettability to the surface of an object.

The nonionic surfactant having an HLB of less than 12.5 is preferably a nonionic surfactant represented by the above general formula (c1) and having an HLB of less than 12.5. In the general formula (c1), if R is^1cOtherwise the chemical structure is the same, then R^1cThe larger the number of carbon atoms, the lower the HLB value. In general formula (c1), the AO group is an alkyleneoxy group having 2 to 4 carbon atoms and containing an ethyleneoxy group, and the ethyleneoxy group has a higher HLB value than the propyleneoxy group. In the general formula (c1), if the chemical structures other than n are the same, the larger the value of n, the higher the HLB value, and the smaller the value of n, the lower the HLB value.

The aqueous composition of the present invention contains the component (c) in an amount of preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and still more preferably 0.3% by mass or more, and preferably 5% by mass or less, more preferably 2% by mass or less, and still more preferably 1% by mass or less.

In the aqueous composition of the present invention, from the viewpoint of the prevention of adsorption of the component (a) and the component (c) to the nonwoven fabric and the bactericidal property, the molar ratio (content of divalent ion)/((content of component (c)) based on the content of divalent ion in the component (b) to the content of the component (c) is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.9 or more, further preferably 2.0 or more, further preferably 4.0 or more, and preferably 40 or less, more preferably 20 or less. The molar ratio can also be calculated from the amounts of the components (b) and (c) to be mixed in the preparation of the aqueous composition of the present invention.

In the present invention, a surfactant other than the component (a) and the component (c) [ hereinafter, referred to as a component (c') ] may be contained, but attention is required in terms of impairing the effect of the component (a) and/or in terms of touch after wiping. Examples of the component (c') include anionic surfactants such as alkylbenzenesulfonates, alkylsulfuric acid ester salts, and polyoxyethylene alkylsulfuric acid ester salts; amphoteric surfactants such as carboxybetaine and sulfobetaine. When the component (c') is used, the content thereof in the aqueous composition of the present invention is 0.5% by mass or less, preferably 0.1% by mass or less, and more preferably 0.05% by mass or less.

The aqueous composition of the present invention may contain an organic solvent as the component (d). (d) The component (B) is preferably an organic solvent having a hydroxyl group and a ClogP of-2.0 or more and less than 1.0. In the present invention, CLogP is calculated by using ChemBioDraw Ultra ver.14.0 (Perkin Elmer Co.) ChemBioDraw Ultra. The larger the ClogP value, the higher the hydrophobicity.

(d) The ClogP of the component (A) is preferably-1.6 or more, more preferably-1.3 or more, and preferably 0.8 or less, more preferably 0.5 or less.

(d) The component (C) is preferably at least one organic solvent having a hydroxyl group selected from the following components (d1) to (d 3).

(d1) The components: an organic solvent having a hydroxyl group and having a ClogP of-2.0 or more and less than 1.0 in a monohydric alcohol having 2 or more and 6 or less carbon atoms

(d2) The components: an organic solvent having a hydroxyl group and having a ClogP of-2.0 or more and less than 1.0 in a binary or twelve-membered alcohol having 2 or more and 12 or less carbon atoms

(d3) The components: an organic solvent having a hydrocarbon group having 1 to 8 carbon atoms, an ether group and a hydroxyl group, and having a ClogP of-2.0 to less than 1.0 (wherein the hydrocarbon group does not include an aromatic group.)

Specific examples of the components (d1) to (d3) are shown below. The figure in (c) is a calculated value (CLogP) of each component calculated using Chem Bio draw ultra ver.14.0 from Perkin Elmer.

Examples of the component (d1) include ethanol (-0.24), 1-propanol (0.29), and 2-propanol (0.07).

Examples of the component (d2) include ethylene glycol (-1.4), propylene glycol (-1.1), butylene glycol (-0.73), hexylene glycol (-0.02), diethylene glycol (-1.3), triethylene glycol (-1.5), tetraethylene glycol (-1.66), dipropylene glycol (-0.69), tripropylene glycol (-0.55), and glycerol (-1.5).

Examples of the component (d3) include diethylene glycol monomethyl ether (-0.78), diethylene glycol dimethyl ether (-0.26), triethylene glycol monomethyl ether (-0.96), diethylene glycol monoethyl ether (-0.39), diethylene glycol diethyl ether (0.52), diethylene glycol monobutyl ether (0.67), dipropylene glycol monomethyl ether (-0.16), dipropylene glycol monoethyl ether (0.23), tripropylene glycol monomethyl ether (-0.03), 1-methoxy-2-propanol (-0.30), 1-ethoxy-2-propanol (0.09), 1-methyl glyceryl ether (-1.43), 2-methyl glyceryl ether (-0.73), 1, 3-dimethyl glyceryl ether (-0.67), 1-ethyl glyceryl ether (-1.04), 1, 3-diethyl glyceryl ether (0.11), triethyl glyceryl ether (0.83), and mixtures thereof, 1-Pentylglyceryl ether (0.54).

The component (d1) used in the present invention is preferably ethanol from the viewpoint of a feeling of use, and the component (d2) is preferably at least one selected from the group consisting of ethylene glycol, propylene glycol, glycerin, diethylene glycol, and dipropylene glycol from the viewpoint of liquid stability.

The aqueous composition of the present invention may further contain an organic solvent having a hydroxyl group with a ClogP of 1.0 to 2.2 as the component (d). Examples of the organic solvent include an organic solvent having a hydrocarbon group having 1 to 8 carbon atoms, an ether group and a hydroxyl group, and having a ClogP of 1.0 to 2.2. Specific examples thereof include 2-pentylglyceryl ether (1.25), 1-octylglyceryl ether (2.1), 2-ethylhexyl glyceryl ether (2.0), 2-phenoxyethanol (1.2), diethylene glycol monophenyl ether (1.25), triethylene glycol monophenyl ether (1.08), 2-benzyloxyethanol (1.1), and diethylene glycol monobenzyl ether (1.0). The figure in (c) is a calculated value (CLogP) of each component calculated using Chem Bio draw ultra ver.14.0 from Perkin Elmer.

The aqueous composition of the present invention contains the component (d) in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, and still more preferably 10% by mass or less.

The aqueous composition of the present invention may contain the following components (e1) to (e3) as further optional components.

(e1) The components: hydroxylamine compound having 1 to 8 carbon atoms and containing amino group and hydroxyl group

(e2) The components: compounds containing silicon atoms

(e3) The components: a perfume compound, an antioxidant, a preservative, a coloring matter or a pH adjuster (wherein the above-mentioned component (a), (b), (c) and (d) are not included)

In the component (e1), the amino group is preferably one or more amino groups selected from primary and secondary amino groups. Specific examples of the component (e1) include at least one compound selected from the group consisting of monoethanolamine, mono-lower alkyl (having 1 or more and 3 or less carbon atoms) aminomonoethanolamine, mono-lower alkyl (having 1 or more and 3 or less carbon atoms) aminodiethanolamine, di-lower alkyl (having 1 or more and 3 or less carbon atoms) aminomonoethanolamine, triethanolamine and trishydroxymethylaminomethane. (e1) The ingredient may be contained as ammonium ions depending on the pH in the aqueous composition of the present invention. The aqueous composition of the present invention may contain the component (e1) in an amount of 0.1 to 2% by mass.

Specific examples of the component (e2) include at least one compound selected from the group consisting of silica and silicone compounds. Examples of the silicone compound include dimethylpolysiloxane, a polyether-modified silicone compound containing an ethylene oxide group having 2 to 3 carbon atoms, and a silicone compound having one or more amino groups selected from primary to tertiary amino groups. The aqueous composition of the present invention may contain the component (e2) in an amount of 0.01 to 1% by mass.

The aqueous composition of the present invention contains water. As the water, ion-exchanged water, distilled water, sterilized purified water, tap water, or water containing a hypochlorite such as sodium hypochlorite of 0.1 to 5mg/kg can be used.

The aqueous composition of the present invention contains water in an amount of preferably 70% by mass or more, more preferably 75% by mass or more, further preferably 80% by mass or more, and preferably 99% by mass or less, more preferably 98% by mass or less, further preferably 97% by mass or less.

In the aqueous composition of the present invention, the pH at 25 ℃ is preferably 6 or more, more preferably 6.5 or more, further preferably 7 or more, and preferably 10 or less, more preferably 9 or less, further preferably 8 or less, from the viewpoint of the prevention of adsorption of the component (a) and the component (c) to the nonwoven fabric. The pH of the aqueous composition of the present invention can be measured by the method described in examples using a glass electrode.

The aqueous composition of the present invention may be an aqueous composition prepared by blending component (a), component (b), component (c) and water under predetermined conditions. Therefore, the wiping material of the present invention may be a wiping material comprising a nonwoven fabric and an aqueous composition supported on the nonwoven fabric, wherein the aqueous composition is obtained by blending the component (a), the component (b), the component (c) and water, and the molar ratio (blending amount of divalent ion)/((blending amount of component (a)) of the divalent ion blending amount based on the component (b) to the blending amount of the component (a) is 0.4 to 40 inclusive.

< nonwoven Fabric >

Nonwoven fabrics are generally constructed to include hydrophilic fibers and/or hydrophobic fibers. The nonwoven fabric is preferably processed into a sheet.

In the present invention, the hydrophilic fiber means a fiber having a moisture content (20 ℃ C., 65% RH) of more than 5% in a standard state. The water content in the standard state is measured according to the method defined in JIS L1013 and JIS L1015. The hydrophobic fibers mean fibers having a moisture content of 5% or less in a standard state (20 ℃ C., 65% RH).

Examples of the hydrophilic fiber include a hair fiber (cotton, kapok, etc.), a bast fiber (hemp, flax, ramie, hemp, jute, etc.), a vein fiber (abaca, sisal, etc.), a palm fiber, rush, straw, a animal hair fiber (wool, mohair, cashmere, camel hair, alpaca hair, llama hair, angora, etc.), a silk fiber (silk, wild silk), a feather, a cellulose fiber (rayon, polynosic fiber, cuprammonium fiber, acetate fiber, etc.), a hydrophilized polyethylene terephthalate fiber (a polyethylene terephthalate fiber subjected to hydrophilization treatment, and having a moisture content in the above-mentioned standard state within the range of the hydrophilic fiber), and the like, and one or two or more of these fibers can be used.

In the present invention, from the viewpoint of ease of wiping, liquid absorption properties and liquid discharge properties, the hydrophilic fiber is preferably at least one selected from the group consisting of a wool fiber, a cellulose fiber and a hydrophilic polyethylene terephthalate fiber, and more preferably at least one selected from the group consisting of cotton and rayon.

Examples of the hydrophobic fibers include polyamide fibers (nylon and the like), polyester fibers (polyester, polyethylene terephthalate and the like), polyacrylonitrile fibers (acrylic and the like), polyvinyl alcohol fibers (vinylon and the like), polyvinyl chloride fibers (polyvinyl chloride and the like), polyvinylidene chloride fibers (vinylidene chloride and the like), polyolefin fibers (polyethylene, polypropylene and the like), polyurethane fibers (polyurethane and the like), polyvinyl chloride/polyvinyl alcohol copolymer fibers (polyvinyl chloride and the like), and one kind or two or more kinds of these fibers can be used.

In the present invention, from the viewpoint of the strength of the nonwoven fabric, particularly the wet strength and ease of wiping when the nonwoven fabric is impregnated with the aqueous composition, the hydrophobic fiber is preferably at least one selected from the group consisting of polyester fibers and polyolefin fibers, and more preferably at least one selected from the group consisting of polyester fibers, polyethylene fibers and polypropylene fibers.

The nonwoven fabric used in the present invention includes a nonwoven fabric in which the proportion of hydrophilic fibers in the constituent fibers is 50 mass% or more. In this case, the remainder of the constituent fibers are hydrophobic fibers. More specifically, the nonwoven fabric includes 50 to 95 mass% of hydrophilic fibers and 5 to 50 mass% of hydrophobic fibers in constituent fibers. The nonwoven fabric used in the present invention contains hydrophilic fibers in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, and even more preferably 70% by mass or more, of the constituent fibers. The nonwoven fabric used in the present invention contains hydrophobic fibers in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably 15% by mass or more, of the constituent fibers. The mass% of the total of the hydrophilic fibers and the hydrophobic fibers was 100 mass%.

If the nonwoven fabric is a blended nonwoven fabric containing hydrophilic fibers such as rayon and cotton, and hydrophobic fibers such as polyester, polypropylene, and polyethylene, the bending stiffness value (B value) of the nonwoven fabric can be increased, and the ease of wiping the wiping material can be improved. In the present invention, by using the inorganic salt specified as component (b) in combination, even in the case of a blended nonwoven fabric comprising hydrophilic fibers and hydrophobic fibers, the adsorption of the cationic surfactant of component (a) and the nonionic surfactant of component (c) can be suppressed, and the cationic surfactant and the nonionic surfactant blended in the aqueous composition are released as set, and therefore, the expected effects can be obtained.

The weight per unit area of the nonwoven fabric used in the present invention is preferably 10g/m²Above, more preferably 20g/m²Above, and, preferably, 100g/m²Hereinafter, more preferably 80g/m²Hereinafter, more preferably 60g/m²The following. The nonwoven fabric of the wiping material of the present invention preferably has the basis weight in a state before the aqueous composition is carried thereon.

The nonwoven fabric used in the present invention preferably has a bending rigidity value (B value) of 0.050gf cm²More preferably 0.10gf cm or more²More preferably 0.15gf cm or more²More preferably 0.20gf cm or more²Is more than or equal to cm, and is preferably 3.0gf cm²Less than or equal to cm, more preferably 2.0gf cm²A value of not more than cm, more preferably 1.0gf cm²Less than/cm. In the present invention, the bending rigidity value of the nonwoven fabric can be measured by the following method. A pure bending tester (for example, KES-FB2(KATO TECH Co., Ltd.)) was used, and the curvature K was. + -. 2.5cm^-1In the range of (1), the nonwoven fabric cut into a size of 20cm × 20cm is subjected to constant speedDegree (deformation speed 0.5 cm)^-1In/sec), the B value (gf cm) of the flexural rigidity per unit length was calculated²In/cm). The bending test was performed at three positions in the longitudinal direction and the transverse direction, and the average value of the longitudinal direction and the transverse direction was calculated, and the larger value of the longitudinal direction and the transverse direction was set as the bending rigidity value (B value). The nonwoven fabric of the wiping material of the present invention preferably has the above bending rigidity value in a state before the aqueous composition is carried.

In the wiping material of the present invention, the aqueous composition is preferably carried in an amount of 200 mass% or more relative to the nonwoven fabric in a dry state. The mass% is a mass ratio (loading rate (mass%) of the aqueous composition of the present invention to the mass of the nonwoven fabric in a dry state) and is calculated by the following formula.

The supporting ratio (mass%) ((mass of nonwoven fabric impregnated with the aqueous composition)/(mass of dried nonwoven fabric) -1) × 100

The loading rate is preferably 200 mass% or more, more preferably 250 mass% or more, and even more preferably 300 mass% or more, and is preferably 600 mass% or less, more preferably 550 mass% or less, and even more preferably 500 mass% or less.

The wiping material of the invention can be used for wiping articles and bodies. Examples of the article include, but are not limited to, articles worn on the body such as clothes, shoes, hats, and helmets, articles such as bags and pouches, furniture such as mattresses, sofas, tables, and chairs, bedding, and other household articles. Shoes are one of the preferred objects of the wiping material of the invention.

According to the present invention, there is provided a method for producing a wiping material, comprising impregnating a nonwoven fabric with an aqueous composition containing component (a), component (b), component (c), and water, wherein the molar ratio (divalent ion content)/((a) content) of the divalent ion content of component (b) to the content of component (a) is 0.4 to 40 inclusive.

Further, according to the present invention, there is provided a method for producing a wiping material, comprising mixing the component (a), the component (b), the component (c) and water to prepare an aqueous composition, and impregnating a nonwoven fabric with the aqueous composition, wherein the component (a) and the component (b) are mixed so that the molar ratio of the amount of divalent ions to the amount of the component (b) (the amount of divalent ions)/((the amount of the component (a)) is 0.4 to 40 inclusive, when the aqueous composition is prepared.

These manufacturing methods may be the manufacturing methods of the wiping material of the present invention. In these production methods, the matters described in the wiping material of the present invention can be suitably applied. In this case, the content of each component in the composition may be used, for example, by replacing the amount of each component in the composition with the amount of each component in the composition.

[ wiping method ]

The present invention provides a wiping method for wiping an object with the wiping material of the present invention. Specific examples and preferred examples of the aqueous composition and nonwoven fabric are the same as those of the wiping material of the present invention. When the object is wiped, the component (a) and the component (c) may adhere to the object to provide a bactericidal effect or the like. Further, dirt on the object can be removed by wiping.

In the wiping method of the present invention, the article or body described in the wiping material of the present invention may be used as the object, and the object is preferably a shoe. The wiping can generally be performed manually.

[ method of inhibiting adsorption ]

The invention provides an adsorption inhibiting method for inhibiting adsorption of a component (a) and a component (c) to a nonwoven fabric when an aqueous composition containing the component (a) and the component (c) is brought into contact with the nonwoven fabric,

in the aqueous composition, component (b) is further added so that the molar ratio (content of divalent ion)/((content of component (a)) of the content of divalent ion based on component (b) to the content of component (a) is 0.4 to 40 inclusive.

The method may be an adsorption inhibiting method of inhibiting adsorption of the components (a) and (c) to the nonwoven fabric when the aqueous composition is brought into contact with the nonwoven fabric by further adding the component (b) to the aqueous composition containing the components (a) and (c) for contact with the nonwoven fabric so that the molar ratio (content of divalent ions) based on the content of divalent ions of the component (b) to the content of the component (a)/((content of component (a)) is 0.4 to 40 inclusive. Specific examples and preferred examples of the aqueous composition and nonwoven fabric are the same as those of the wiping material of the present invention.

The present inventors have found that when divalent ions derived from component (b) are caused to coexist in a predetermined molar ratio with an aqueous composition containing components (a) and (c), adsorption of components (a) and (c) to a nonwoven fabric can be suppressed when the aqueous composition is brought into contact with the nonwoven fabric. By suppressing the adsorption of the component (a) and the component (c) to the nonwoven fabric, for example, in the case where a combination of the nonwoven fabric and the aqueous composition is used as a wiping material, the effects of the component (a) and the component (c) are more effectively exhibited because the amounts of the component (a) and the component (c) in the aqueous composition transferred from the wiping material to the object are not reduced.

In addition to the above embodiments, the present invention also discloses the following aspects.

＜1＞

A wiping material comprising a nonwoven fabric and an aqueous composition supported on the nonwoven fabric,

the aqueous composition comprises (a) a cationic surfactant [ hereinafter referred to as component (a) ], (b) an inorganic salt [ hereinafter referred to as component (b) ], which is composed of a cation and an anion, wherein the cation is a cation of an element belonging to group 1 or group 2 of the periodic table of the elements, and at least one of the cation and the anion is a divalent ion, and (c) a nonionic surfactant [ hereinafter referred to as component (c) ], and water,

＜2＞

The wiping material according to < 1 > wherein the component (a) is one or more cationic surfactants selected from the group consisting of N-alkylpyridinium salt surfactants and quaternary ammonium salt surfactants.

＜3＞

The wiping material according to < 1 > or < 2 >, wherein the component (a) is a quaternary ammonium salt type surfactant.

＜4＞

The wiping material as set forth in any one of the above < 1 > -3 >, wherein the component (a) is a compound represented by the following general formula (a 1).

[ chemical formula 3]

[ in the formula, R¹～R⁴Each independently represents an alkyl group having 1 to 20 carbon atoms. Wherein R is¹～R⁴The number of carbon atoms in any one of the above is 8 to 20. X^-Represents a counter ion. Angle (c)

＜5＞

The wiping material according to < 4 >, wherein, in the general formula (a1), R¹～R⁴Each is an alkyl group which may be substituted with a group selected from the group consisting of a hydroxyl group, an alkoxy group, an acyloxy group, an acylamino group and an aryl group.

＜6＞

The wiping material according to < 5 >, wherein the aryl group is an aryl group having 6 to 20 carbon atoms, and is further an aryl group selected from phenyl and naphthyl, and is further a phenyl group.

＜7＞

The wiping material as described in any of < 4 > - < 6 >, wherein the compound represented by the general formula (a1) is R¹Is an alkyl group having 8 to 20 carbon atoms, R²And R⁴Is alkyl with carbon number more than 1 and less than 3, R³A compound having an alkyl group having 1 to 10 carbon atoms.

＜8＞

The wiping material as described in any of < 4 > - < 7 >, wherein, in the general formula (a1), X^-Is an ion selected from the group consisting of an inorganic or organic carboxylate ion, sulfonate ion and halide ion, further a halide ion, further an ion selected from the group consisting of chloride ion and bromide ion, further a chloride ion.

＜9＞

The wiping material according to any one of < 1 > < 8 >, wherein the component (a) is a compound represented by the following general formula (a 1-1).

[ chemical formula 4]

＜10＞

The wiping material according to < 9 >, wherein the carbon number of Ar in the general formula (a1-1) is preferably 6 or more, and is preferably 10 or less, more preferably 8 or less, and still more preferably 6.

＜11＞

The wiping material according to < 9 > or < 10 >, wherein, in the general formula (a1-1), Ar is a group selected from a phenyl group which may have a substituent and a naphthyl group which may have a substituent.

＜12＞

The wiping material as described in any of < 9 > - < 11 >, wherein the compound represented by the general formula (a1-1) is R¹¹Is unsubstituted alkyl with more than 8 and less than 20 carbon atoms, R¹²And R¹³A compound which is an unsubstituted alkyl group having 1 to 3 carbon atoms, L is a methylene group, and Ar is a phenyl group which may have a substituent.

＜13＞

The wiping material according to any one of < 1 > - < 12 >, wherein the component (a) is alkylbenzyldimethylammonium chloride in which the number of carbon atoms in the alkyl group is 8 or more and 18 or less.

＜14＞

The wiping material according to any one of < 1 > - < 13 >, wherein the aqueous composition contains the component (a) preferably at 0.05% by mass or more, more preferably at 0.1% by mass or more, further preferably at 0.2% by mass or more, and preferably at 5% by mass or less, more preferably at 2% by mass or less, further preferably at 0.5% by mass or less.

＜15＞

The wiping material according to any one of < 1 > < 14 >, wherein the element of group 1 of the periodic table in the component (b) is an element selected from lithium, sodium and potassium.

＜16＞

The wiping material according to any one of < 1 > < 15 >, wherein the element of group 2 of the periodic table in the component (b) is an element selected from magnesium and calcium.

＜17＞

The wiping material according to any of < 1 > < 16 >, wherein the divalent anion in component (b) is an ion selected from sulfide ion, carbonate ion and sulfate ion.

＜18＞

The wiping material according to any one of < 1 > < 17 >, wherein the component (b) is an inorganic salt containing one or more ions selected from calcium ions, magnesium ions, sulfate ions and sulfite ions as divalent ions.

＜19＞

The wiping material according to any one of < 1 > - < 18 >, wherein the component (b) is an inorganic salt selected from the group consisting of calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, lithium sulfate, sodium sulfate, potassium sulfate, magnesium sulfate, sodium sulfite, and magnesium sulfite.

＜20＞

The wiping material according to any one of < 1 > - < 19 >, wherein the aqueous composition contains the component (b) preferably at 0.1 mass% or more, more preferably at 0.2 mass% or more, further preferably at 0.4 mass% or more, and preferably at 10 mass% or less, more preferably at 5 mass% or less, further preferably at 2 mass% or less.

＜21＞

The wiping material according to any one of < 1 > -to < 20 >, wherein a molar ratio of the content of the divalent ion based on the component (b) to the content of the component (a) (content of the divalent ion)/((content of the component (a)) in the aqueous composition is 0.4 or more, preferably 0.5 or more, more preferably 0.9 or more, further preferably 2.0 or more, further preferably 4.0 or more, and 40 or less, preferably 20 or less.

＜22＞

The wiping material according to any one of < 1 > < 21 >, wherein the component (c) is a polyoxyalkylene-type nonionic surfactant, and further a nonionic surfactant containing an ethyleneoxy group.

＜23＞

The wiping material according to < 22 > wherein the nonionic surfactant containing an ethyleneoxy group is a nonionic surfactant represented by the following general formula (c 1).

R^1c(CO)_mO－(AO)_n－R^2c (c1)

＜24＞

The wiping material according to < 23 >, wherein, in the general formula (c1), R^1cHas a carbon number of 9 or more, preferably 10 or more, more preferably 11 or more, and preferably 18 or less, more preferably 16 or less, further preferably 15 or less, and further preferably 14 or less.

＜25＞

The wiping material according to < 23 > or < 24 >, wherein, in the general formula (c1), R^1cIs a group selected from alkyl and alkenyl.

＜26＞

The wiping material according to any one of < 23 > - < 25 >, wherein in the general formula (c1), the AO group is an alkyleneoxy group having 2 or more and 3 or less carbon atoms and containing an ethyleneoxy group, preferably an ethyleneoxy group.

＜27＞

The wiping material according to any one of < 23 > - < 26 >, wherein n in the general formula (c1) is 1 or more, preferably 3 or more, more preferably 4 or more, further preferably 5 or more, still more preferably 6 or more, and 50 or less, preferably 40 or less, more preferably 30 or less, further preferably 20 or less, still more preferably 15 or less, still more preferably 12 or less, still more preferably 10 or less, still more preferably 8 or less, and still more preferably 7 or less.

＜28＞

The wiping material according to any one of < 1 > - < 27 >, wherein the aqueous composition contains the component (c) preferably at 0.1 mass% or more, more preferably at 0.2 mass% or more, further preferably at 0.3 mass% or more, and preferably at 5 mass% or less, more preferably at 2 mass% or less, further preferably at 1 mass% or less.

＜29＞

The wiping material according to any one of < 1 > - < 28 >, wherein the molar ratio (content of divalent ion)/((content of component (c)) of the content of divalent ion based on the component (b) to the content of the component (c) in the aqueous composition is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.9 or more, further preferably 2.0 or more, further preferably 4.0 or more, and preferably 40 or less, more preferably 20 or less.

＜30＞

The wiping material according to any one of < 1 > < 29 > wherein the aqueous composition contains a surfactant [ hereinafter, referred to as component (c') ] other than the components (a) and (c).

＜31＞

The wiping material according to < 30 > wherein the content of the component (c') in the aqueous composition is 0.5% by mass or less, preferably 0.1% by mass or less, and more preferably 0.05% by mass or less.

＜32＞

The wiping material according to any one of < 1 > < 31 >, wherein the aqueous composition contains (d) an organic solvent [ hereinafter, referred to as component (d) ].

＜33＞

The wiping material according to < 32 > wherein the ClogP of the component (d) is preferably-1.6 or more, more preferably-1.3 or more, and preferably 0.8 or less, more preferably 0.5 or less.

＜34＞

The wiping material according to < 32 > or < 33 >, wherein the component (d) is an organic solvent having a hydroxyl group and a ClogP of-2.0 or more and less than 1.0.

＜35＞

The wiping material as described in any of (32) to (34), wherein the component (d) is one or more organic solvents having a hydroxyl group selected from the following components (d1) to (d3),

＜36＞

The wiping material according to < 35 > wherein the component (d1) is one or more selected from the group consisting of ethanol, 1-propanol and 2-propanol, and further ethanol.

＜37＞

The wiping material according to < 35 > or < 36 >, wherein the component (d2) is one or more selected from the group consisting of ethylene glycol, propylene glycol, glycerin, diethylene glycol and dipropylene glycol.

＜38＞

The wiping material according to any one of < 1 > - < 37 >, wherein the aqueous composition contains the component (d) preferably at 0.1 mass% or more, more preferably at 0.5 mass% or more, further preferably at 1 mass% or more, and preferably at 30 mass% or less, more preferably at 20 mass% or less, further preferably at 10 mass% or less.

＜39＞

The wiping material according to any one of < 1 > - < 38 >, wherein the aqueous composition contains water, and further contains water preferably at least 70% by mass, more preferably at least 75% by mass, further preferably at least 80% by mass, and preferably at most 99% by mass, more preferably at most 98% by mass, further preferably at most 97% by mass.

＜40＞

The wiping material as set forth in any one of < 1 > - < 39 >, wherein the pH of the aqueous composition at 25 ℃ is preferably 6 or more, more preferably 6.5 or more, further preferably 7 or more, and preferably 10 or less, more preferably 9 or less, further preferably 8 or less.

＜41＞

The wiping material according to any one of < 1 > to < 40 >, wherein the nonwoven fabric is configured to contain hydrophilic fibers and/or hydrophobic fibers.

＜42＞

The wiping material according to any one of < 1 > - < 41 >, wherein the nonwoven fabric is a nonwoven fabric in which the proportion of the hydrophilic fibers in the constituent fibers is 50 mass% or more.

＜43＞

The wiping material according to any one of < 1 > - < 42 >, wherein the nonwoven fabric is a nonwoven fabric in which the constituent fibers include 50 mass% or more and 95 mass% or less of hydrophilic fibers and 5 mass% or more and 50 mass% or less of hydrophobic fibers.

＜44＞

The wiping material according to < 43 >, wherein the nonwoven fabric is a nonwoven fabric comprising hydrophilic fibers in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, and still more preferably 70% by mass or more of the constituent fibers, and wherein the mass% of the total of the hydrophilic fibers and the hydrophobic fibers is 100% by mass.

＜45＞

The wiping material according to < 43 > or < 44 >, wherein the nonwoven fabric is a nonwoven fabric comprising hydrophobic fibers in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably 15% by mass or more of the constituent fibers, and wherein the mass% of the total of the hydrophilic fibers and the hydrophobic fibers is 100% by mass.

＜46＞

The wiping material according to any of < 1 > - < 45 >, wherein the nonwoven fabric preferably has a weight per unit area of 10g/m²Above, more preferably 20g/m²Above, and preferably 100g/m²Hereinafter, more preferably 80g/m²Hereinafter, more preferably 60g/m²The following.

＜47＞

The wiping material according to any one of < 1 > -46, wherein the nonwoven fabric preferably has a bending rigidity value (B value) of 0.050gf cm²More preferably 0.10gf cm or more²More preferably 0.15gf cm or more²More preferably 0.20gf cm or more²Is more than or equal to cm, and is preferably 3.0gf cm²Less than or equal to cm, more preferably 2.0gf cm²A value of not more than cm, more preferably 1.0gf cm²Less than/cm.

＜48＞

The wiping material according to any one of < 1 > < 46 >, wherein the nonwoven fabric is a sheet-like nonwoven fabric.

＜49＞

The wiping material according to any one of < 1 > - < 48 >, wherein the aqueous composition is supported by the nonwoven fabric in a dry state in an amount of preferably 200% by mass or more, more preferably 250% by mass or more, further preferably 300% by mass or more, and preferably 600% by mass or less, more preferably 550% by mass or less, further preferably 500% by mass or less.

＜50＞

The wiping material according to any one of < 1 > - < 49 >, wherein the aqueous composition is obtained by blending the component (a), the component (b), the component (c) and water under predetermined conditions, and the molar ratio (blending amount of divalent ions)/((blending amount of component (a)) based on the blending amount of divalent ions of the component (b) and the blending amount of the component (a) is 0.4 or more and 40 or less.

＜51＞

The wiping material according to any one of < 1 > < 50 >, which is used for shoes.

＜52＞

A wiping method for wiping an object with the wiping material as set forth in any one of < 1 > -51 >.

＜53＞

The wiping method according to < 52 > wherein the object is a shoe.

＜54＞

An adsorption-inhibiting method for inhibiting adsorption of a component (a) and a component (c) to a nonwoven fabric when an aqueous composition containing the component (a) and the component (c) is brought into contact with the nonwoven fabric,

in the aqueous composition, component (b) is further added so that the molar ratio (divalent ion content)/((a) component content) of the divalent ion content to the component (a) content based on component (b) is 0.4 to 40 inclusive.

＜55＞

A method for producing a wiping material, which comprises impregnating a nonwoven fabric with an aqueous composition containing component (a), component (b), component (c) and water, wherein the molar ratio of the content of divalent ions in component (b) to the content of component (a) (content of divalent ions)/((content of component (a)) is 0.4 to 40 inclusive.

＜56＞

A method for producing a wiping material, which comprises mixing component (a), component (b), component (c) and water to prepare an aqueous composition, impregnating a nonwoven fabric with the aqueous composition, and mixing component (a) and component (b) so that the molar ratio of the amount of divalent ions in component (b) to the amount of component (a) (the amount of divalent ions) to component (b)/((the amount of component (a)) is 0.4 to 40 inclusive, when preparing the aqueous composition.

＜57＞

The method of producing a wiping material as set forth in any one of < 1 > -51 > of < 55 > or < 56 >.

Examples

The aqueous compositions shown in the table were prepared, supported on a nonwoven fabric, and evaluated as follows. The results are shown in the table. In the table, (divalent ion)/(a) is based on the molar ratio of the content of divalent ion of component (b) to the content of component (a) (content of divalent ion)/((content of component (a)). The pH of the composition was adjusted to the values shown in the table with hydrochloric acid and/or sodium hydroxide. The amount used at this time is shown in the table as an appropriate amount.

< examples 1 to 4 and comparative examples 1 to 3 >

(1) Adsorption preventive test

The aqueous composition was impregnated into a spun lace nonwoven fabric in a sheet form, with a rayon: (polypropylene-polyethylene blend fiber) 80: 20 (mass ratio) and a weight per unit area of 60g/m²150mm × 100mm blended nonwoven fabric or rayon: polyester 60: 40 (mass ratio) and a weight per unit area of 35g/m²And 150mm × 100mm blended nonwoven fabric. After standing for 1 week under a seal, the extrudate was collected by pressurization. The amount of component (a) and the amount of component (c) in the extrusion liquid were measured by the following methods, and compared with the amount of component (a) or the amount of component (c) in the aqueous composition before impregnation, thereby evaluating the adsorption preventive properties in accordance with the following criteria. For one of the aqueous compositions, evaluation scores of 2 nonwoven fabrics were obtained, and the average value thereof is shown in the table. The higher the adsorption preventive score, the more difficult it is judged that the amount of the component (a) or the component (c) is adsorbed by the nonwoven fabric, and the more excellent the effect on the object to be wiped.

Evaluation criteria:

and 5, dividing: the amount of the component (a) or (c) in the extrusion liquid is 90% to 100% based on the amount of the component (a) or (c) in the aqueous composition before impregnation.

And 4, dividing: the amount of the component (a) or (c) in the extrusion liquid is 80% or more and less than 90% relative to the amount of the component (a) or (c) in the aqueous composition before impregnation.

And 3, dividing: the amount of the component (a) or (c) in the extrusion liquid is 60% or more and less than 80% relative to the amount of the component (a) or (c) in the aqueous composition before impregnation.

And 2, dividing: the amount of the component (a) or (c) in the extrusion liquid is 40% or more and less than 60% relative to the amount of the component (a) or (c) in the aqueous composition before impregnation.

1 minute: the amount of the component (a) or (c) in the extrusion liquid is less than 40% based on the amount of the component (a) or (c) in the aqueous composition before impregnation.

[ (method for determining amount of component (a) or (c) ]

Diluted with methanol and quantified by LC-MS.

An apparatus: SHIMADZU LCMS-2020

Column: shim-pack XR-ODS 50L X2.0 (2.0mmi. d X50 mm)

Eluent A10mM ammonium acetate (solvent: distilled water)/B10 mM ammonium acetate (solvent: methanol)

Time program: b50% (0-4 min) -B100% (4-11 min) -B50% (11-15 min)

(2) Antibacterial property test by wiping

The aqueous composition was impregnated into a spun lace nonwoven fabric in a sheet form, with a rayon: (polypropylene-polyethylene mixed fiber) ═ 80: 20 (mass ratio) and a weight per unit area of 60g/m²And 150mm × 100mm blended nonwoven fabric. The sample was sealed in an aluminum bag, and stored at 30 ℃ for over one week to prepare a sample for evaluation. In addition, a sample obtained immediately after being similarly immersed in ion-exchanged water so that the loading rate became 400 mass% was used as a sample for a negative control. Using each sample, a 5cm × 5cm synthetic leather surface having a polyurethane surface material was wiped 10 times under a load of 1kg, and the sample obtained by drying overnight was subjected to the following antibacterial test (refer to JIS Z2801).

Antibacterial property test

As test bacteria, Staphylococcus aureus NBRC12732 and Staphylococcus epidermidis ATCC12228 were used. Suspending the test bacteria cultured on SCD agar mediumIn a physiological saline solution containing an SCD medium at a concentration of 1/10, the concentration was 1.0X 10⁶CFU/mL or more and 9.0X 10⁶Bacterial suspension was prepared in a manner of CFU/mL or less. 0.1mL of the inoculum solution was added to the surface of each synthetic leather, covered with a 4cm × 4cm Stomacher membrane, and lightly pressed so that the inoculum solution spread over the entire membrane. Placing into a culture dish, and culturing at 37 + -1 deg.C under relative humidity above 90% for 24 + -1 hr. The cells were put into 10mL of LP diluent as an inactivating agent together with the membrane, and sufficiently kneaded to wash out the test cells. This was mixed-cultured in an SCD agar medium, the number of viable bacteria was counted, and the antibacterial activity value was calculated based on the following formula.

R＝log(A)－log(B)

Wherein, R: antibacterial activity value

A: number of surviving residual bacteria (CFU/cm) of negative control²)

B: number of surviving residual bacteria (CFU/cm) of each sample²)

[ Table 1]

[ Table 2]

*1: zinc sulfate is not dissolved, white precipitate is generated, and the zinc sulfate cannot be uniformly mixed.

In Table 2, the component (bx) is a comparative compound of the component (b).

[ Table 3]

[ Table 4]

In the table, the alkyl group of alkyldimethylbenzylammonium chloride (molecular weight 354.02) has carbon numbers 12 and 14 as main components.

Further, polyoxyethylene alkyl ether (1) was EMULGEN 105(HLB9.7, kao corporation), polyoxyethylene alkyl ether (2) was EMULGEN 108(HLB12.1, kao corporation), and polyoxyethylene alkyl ether (3) was EMULGEN 121(HLB16.6, kao corporation).

The dimethylpolysiloxane was DOWSIL DK Q1-1247 ANTIFORM (Dow Toray Co., Ltd.).

< example 5 >

The wiping materials were produced using the aqueous compositions and nonwoven fabrics shown in table 5, and the ease of wiping on the inner and outer sides of women's shoes made of artificial leather (grain surface, i.e., artificial leather whose surface material was polyurethane or textured) was evaluated by 5 evaluators for sensory evaluation according to the following criteria. Evaluation values of the 5 results are shown in the table.

And 3, dividing: is very easy to wipe

And 2, dividing: easy to wipe

1 minute: slightly easier to wipe

0 minute: difficult to wipe

[ Table 5]

Claims

1. A wiping material comprising a nonwoven fabric and an aqueous composition supported on the nonwoven fabric, the aqueous composition comprising:

a cationic surfactant, hereinafter referred to as component a;

an inorganic salt in which b is formed of a cation and an anion, the cation is a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion is a divalent ion, and is hereinafter referred to as component b;

c a nonionic surfactant, hereinafter referred to as component c; and

the amount of water is controlled by the amount of water,

the aqueous composition has a molar ratio of the content of divalent ions based on component b to the content of component a, i.e., the content of divalent ions/the content of component a, of 0.4 to 40 inclusive.

2. The wiping material according to claim 1, wherein the aqueous composition contains the component a in an amount of 0.05 to 5 mass%.

3. The wiping material according to claim 1 or 2, wherein the aqueous composition has a pH of 6 or more and 10 or less at 25 ℃.

4. The wiping material according to any one of claims 1 to 3, wherein the component c is a polyoxyalkylene-type nonionic surfactant.

5. The wiping material according to any one of claims 1 to 4, wherein the nonwoven fabric is a nonwoven fabric in which the proportion of the hydrophilic fibers in the constituent fibers is 50 mass% or more.

6. The wiping material according to any one of claims 1 to 5, wherein the nonwoven fabric is a sheet-like nonwoven fabric.

7. The wiping material according to any one of claims 1 to 6, wherein 200 mass% to 600 mass% of the aqueous composition is supported on the nonwoven fabric in a dry state.

8. A wiping material as claimed in any one of claims 1 to 7 for use in footwear.

9. A wiping method for wiping an object with the wiping material as set forth in any one of claims 1 to 8.

10. The wiping method according to claim 9, wherein the object is a shoe.

11. An adsorption inhibiting method for inhibiting adsorption of a component and a component c to a nonwoven fabric when an aqueous composition containing the component a and the component c is brought into contact with the nonwoven fabric,

the component a is as follows: a cationic surfactant, and (b) a cationic surfactant,

the component c is as follows: c a non-ionic surfactant, wherein the surfactant is a nonionic surfactant,

the aqueous composition further contains component b such that the molar ratio of the divalent ion content of component b to the component a content, i.e., the divalent ion content/component a content, is 0.4 to 40,

the component b is as follows: and b is an inorganic salt formed of a cation and an anion, the cation is a cation of an element of group 1 or group 2 of the periodic table, and at least one of the cation and the anion is a divalent ion.