Permeability-imparting agents and their applications

Abstract

The present invention provides a water-permeability imparting agent to fibers that offers excellent water permeability and stability over time, and is also easy to handle. [Solution] A water permeability imparting agent comprising a nonionic surfactant (N) and at least one selected from an anionic surfactant having an S element (S) and an anionic surfactant having a P element (P), wherein the iodine value of the nonvolatile components of the water permeability imparting agent is 0.5 to 100 gI2 / 100 g and the acid value is 0.5 to 100 mgKOH / g.

Description

[Technical Field]

[0001] This invention relates to a water permeability imparting agent and its use. [Background technology]

[0002] Generally, absorbent products such as disposable diapers and sanitary napkins have an absorbent core made of cotton pulp, superabsorbent polymers, etc., placed between a liquid-permeable top sheet and a liquid-impermeable back sheet. Urine and bodily fluids are absorbed into the absorbent material through the top sheet. To avoid discomfort during this process, it is required that the time it takes for urine and bodily fluids to be completely absorbed be extremely short (instantaneous water permeability). Furthermore, if the treatment agent on the top sheet is washed away after absorbing one or two urinations or defecations, causing a rapid decrease in water permeability, the frequency of replacing the absorbent material will increase. Therefore, water-permeable materials such as top sheets are also required to have repeated water permeability (durable water permeability). Therefore, studies have been conducted to find solutions that meet the above performance requirements. For example, Patent Document 1 proposes a treatment agent containing a polyvalent active hydrogen compound, which is an alkylene oxide adduct of a polyvalent active hydrogen compound. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-130314 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, these treatment agents have problems: they lack the long-term stability of water permeability required for nonwoven fabrics used in current sanitary materials, and the treatment agents themselves are difficult to handle. Therefore, the present invention has been made in view of these circumstances, and its objective is to provide a water-permeability imparting agent that provides excellent water-permeability stability over time to fibers and has excellent handling properties. Furthermore, it is also objective to provide fibers and nonwoven fabrics to which this water-permeability imparting agent is attached. [Means for solving the problem]

[0005] As a result of diligent research to solve the above-mentioned problems, the inventors have found that the above-mentioned problems can be solved by providing a water permeability imparting agent comprising a nonionic surfactant and at least one selected from an anionic surfactant having an S element and an anionic surfactant having a P element, provided that the iodine value and acid value are at specific values. In other words, the water permeability imparting agent of the present invention is a water permeability imparting agent comprising a nonionic surfactant (N) and at least one selected from an anionic surfactant having an S element (S) and an anionic surfactant having a P element (P), wherein the iodine value of the nonvolatile components of the water permeability imparting agent is 0.5 to 100 gI2 / 100 g and the acid value is 0.5 to 100 mgKOH / g.

[0006] The water permeability agent preferably contains the activator (P), which must contain compound (A) represented by the following general formula (1) and compound (B) represented by the following general formula (2), and optionally contains compound (C) represented by the following general formula (3).

[0007] [ka]

[0008] (In the formula, R 1 R is a hydrocarbon group with 6 to 22 carbon atoms. 1 The chain may be straight or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer from 0 to 15. 1 M is a hydrogen atom, an alkali metal, or an organic amine salt. 2 (This is a hydrogen atom, an alkali metal, or an organic amine salt.)

[0009] [Chemical formula]

[0010] (In the formula, R 2 and R 3 are hydrocarbon groups having 6 to 22 carbon atoms. R 2 and R 3 may be linear or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, m is an integer of 0 to 15. M 1 is a hydrogen atom, an alkali metal or an organic amine salt. When there are two (AO) m in the molecule, they may be the same or different from each other.)

[0011] [Chemical formula]

[0012] (In the formula, R 4 is a hydrocarbon group having 6 to 22 carbon atoms. R 4 may be linear or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, m is an integer of 0 to 15. M 1 is a hydrogen atom, an alkali metal or an organic amine salt. M 2 is a hydrogen atom, an alkali metal or an organic amine salt. Q is M 2 or (OA) m R 5 is. R 5 is a hydrocarbon group having 6 to 22 carbon atoms. R 5 may be linear or branched. Y is 1 or 2. When there are two or more M 2 or (AO) m in the molecule, they may be the same or different from each other.)

[0013] The present invention contains the surfactant (S), and it is preferable that the surfactant (S) comprises at least one selected from dialkyl sulfosuccinic acid and dialkyl sulfosuccinate (S-1) and polyhydric alcohol fatty acid sulfate and polyhydric alcohol fatty acid sulfate salt (S-2). Preferably, the total phosphorus content in the nonvolatile matter is 0 to 15% by weight and / or the total sulfur content is 0 to 10% by weight. Preferably, the water permeability imparting agent is for menstrual blood nonwoven fabric. The water permeability imparting agent contains the surfactant (P), and it is preferable that the surfactant (P) essentially contains a surfactant (P-1) having an alkyl group having 12 to 18 carbon atoms and / or an alkenyl group having 12 to 18 carbon atoms, and a surfactant (P-2) having an alkyl group having 10 or fewer carbon atoms and / or an alkenyl group having 10 or fewer carbon atoms.

[0014] The fiber of the present invention is a fiber obtained by applying the above-mentioned water permeability imparting agent to a raw fiber. The nonwoven fabric of the present invention is provided with the above-mentioned water permeability imparting agent. The water-absorbing article of the present invention includes the above-mentioned nonwoven fabric. [Effects of the Invention]

[0015] The water permeability imparter of the present invention has excellent handling properties and can impart excellent water permeability stability over time to fibers. The fibers and nonwoven fabrics of the present invention exhibit excellent water permeability stability over time. [Modes for carrying out the invention]

[0016] [Nonionic surfactant (N)] The water permeability imparting agent of the present invention essentially contains a nonionic surfactant (N). The iodine value of the nonionic surfactant (N) is preferably 0 to 120 g I2 / 100 g, more preferably 5 to 85 g I2 / 100 g, and even more preferably 30 to 70 g I2 / 100 g, from the viewpoint of simultaneously providing excellent handling properties of the iodine imparter and stable water permeability over time.

[0017] The acid value of the nonionic surfactant (N) is preferably 0 to 120 mg KOH / g, more preferably 0.5 to 80 mg KOH / g, even more preferably 1 to 60 mg KOH / g, and particularly preferably 3 to 30 mg KOH / g, from the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability of the imparting agent.

[0018] There are no particular limitations on the nonionic surfactant (N), but from the viewpoint of simultaneously having excellent handling properties of the imparting agent and stable water permeability over time, it is preferable that it be at least one selected from polyoxyalkylene polyhydric alcohol ethers (N1), polyoxyalkylene polyhydric alcohol fatty acid esters (N2), polyoxyalkylene aliphatic alcohol ethers (N3), fatty acid esters of polyalkylene glycols (N4), polyhydric alcohol fatty acid esters (N5), polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol esters (N6) (hereinafter sometimes referred to as polyhydroxy esters), esters in which at least one hydroxyl group of a polyhydroxy ester is sequestered with a fatty acid (N7), nonionic surfactants in which at least one hydroxyl group of a condensate of a polyhydroxy ester and an unsaturated dicarboxylic acid is sequestered with a fatty acid (N8), and polyester-based nonionic surfactants (N9).

[0019] (Polyoxyalkylene polyhydric alcohol ether) (N1) Polyoxyalkylene polyhydric alcohol ethers are compounds that have a structure in which an alkylene oxide, such as ethylene oxide, propylene oxide, or butylene oxide, is added to a polyhydric alcohol. Examples of polyhydric alcohols include ethylene glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. Among these, glycerin, trimethylolpropane, and sucrose are preferred.

[0020] The number of moles of alkylene oxide added is preferably 3 to 100, more preferably 4 to 70, and even more preferably 5 to 50. Furthermore, the proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, and even more preferably 80 mol% or more. The weight-average molecular weight of the polyoxyalkylene polyhydric alcohol ether is preferably 300 to 10000, more preferably 400 to 8000, and even more preferably 500 to 5000.

[0021] Examples of polyoxyalkylene polyhydric alcohol ethers include, but are not limited to, polyethylene glycol, glycerin ethylene oxide adduct, trimethylolpropane ethylene oxide adduct, pentaerythritol ethylene oxide adduct, diglycerin ethylene oxide adduct, sorbitan ethylene oxide adduct, sorbitan ethylene oxide propylene oxide adduct, sorbitol ethylene oxide adduct, sorbitol ethylene oxide propylene oxide adduct, ditrimethylolpropane ethylene oxide adduct, dipentaerythritol ethylene oxide adduct, and sucrose ethylene oxide adduct.

[0022] (Polyoxyalkylene polyhydric alcohol fatty acid ester) (N2) Polyoxyalkylene polyhydric alcohol fatty acid esters are compounds in which a fatty acid is esterified to a compound in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to a polyhydric alcohol. Examples of polyhydric alcohols include glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. Among these, glycerin, diglycerin, sorbitan, and sorbitol are preferred.

[0023] Examples of fatty acids include lauric acid, myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, isocetyl acid, stearic acid, isostearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, and isotetracosanoic acid.

[0024] The number of moles of alkylene oxide added is preferably 3 to 100, more preferably 5 to 70, and even more preferably 10 to 50. Furthermore, the proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, and even more preferably 80 mol% or more. The weight-average molecular weight of the polyoxyalkylene polyhydric alcohol fatty acid ester is preferably 300 to 7000, more preferably 500 to 5000, and even more preferably 700 to 3000.

[0025] Examples of polyoxyalkylene polyhydric alcohol fatty acid esters include, but are not limited to, glycerol ethylene oxide adduct monolaurate, glycerol ethylene oxide adduct dilaurate, glycerol ethylene oxide adduct trilaurate, trimethylolpropane ethylene oxide adduct trilaurate, sorbitan ethylene oxide adduct monooleate, sorbitan ethylene oxide adduct dioleate, sorbitan ethylene oxide adduct trioleate, sorbitan ethylene oxide propylene oxide adduct monooleate, sorbitan ethylene oxide propylene oxide adduct dioleate, sorbitan ethylene oxide propylene oxide adduct trioleate, sorbitan ethylene oxide propylene oxide adduct trilaurate, sucrose ethylene oxide adduct trilaurate, etc.

[0026] (Polyoxyalkylene aliphatic alcohol ether) (N3) Polyoxyalkylene aliphatic alcohol ethers are compounds that have a structure in which an alkylene oxide, such as ethylene oxide, propylene oxide, or butylene oxide, is added to an aliphatic monohydric alcohol. Examples of polyoxyalkylene aliphatic alcohol ethers include alkylene oxide adducts of aliphatic alcohols such as octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oleyl alcohol. The number of moles of alkylene oxide to be added is preferably 1 to 100 moles, more preferably 2 to 70 moles, and even more preferably 3 to 50 moles. Furthermore, the ratio of ethylene oxide to the total alkylene oxide is preferably 20 mol% or more, more preferably 30 mol% or more, and even more preferably 40 mol% or more.

[0027] (Polyalkylene glycol fatty acid ester) (N4) Fatty acid esters of polyalkylene glycols are compounds having a structure in which polyoxyethylene glycol, polyoxyethylene polyoxypropylene glycol, and a fatty acid are ester-bonded. The weight-average molecular weight of polyalkylene glycol is preferably 100 to 1000, more preferably 150 to 800, and even more preferably 200 to 700.

[0028] Examples of polyalkylene glycol fatty acid esters include, but are not limited to, polyethylene glycol monolaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, polyethylene glycol monostearate, polyethylene glycol distearate, polyethylene polypropylene glycol monolaurate, polyethylene polypropylene glycol dilaurate, polyethylene polypropylene glycol monooleate, and polyethylene polypropylene glycol dioleate.

[0029] (Polyhydric alcohol fatty acid ester) (N5) Polyhydric alcohol fatty acid esters are compounds that have a structure in which a polyhydric alcohol and a fatty acid are linked by an ester bond. Examples of polyhydric alcohols include ethylene glycol, trimethylolpropane, pentaerythritol, erythritol, diethylene glycol, diglycerin, triglycerin, tetraglycerin, pentaglycerin, hexaglycerin, heptaglycerin, octaglycerin, sorbitan, sorbitol, ditrimethylolpropane, and sucrose. Among these, ethylene glycol, glycerin, diglycerin, sorbitan, and sorbitol are preferred.

[0030] Examples of fatty acids include lauric acid, myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, isocetyl acid, stearic acid, isostearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, isoeicosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, and lignoceric acid.

[0031] Furthermore, the polyhydric alcohol fatty acid ester has at least one or more hydroxyl groups. The weight-average molecular weight of the polyhydric alcohol fatty acid ester is preferably 100 to 1000, more preferably 200 to 800, and even more preferably 300 to 600.

[0032] Examples of fatty acid esters include, but are not limited to, glycerin monolaurate, glycerin dilaurate, triglycerin monolaurate, hexaglycerin monolaurate, glycerin monopalmitate, glycerin dipalmitate, triglycerin monopalmitate, hexaglycerin monopalmitate, glycerin distearate, triglycerin monostearate, hexaglycerin monostearate, glycerin monooleate, glycerin dioleate, sorbitan monooleate, sorbitan dioleate, sorbitan trioleate, sucrose monolaurate, sucrose dilaurate, etc.

[0033] (Polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester) (sometimes called polyhydroxy ester) (N6) Polyhydroxyesters are structurally esters of polyoxyalkylene group-containing hydroxy fatty acids and polyhydric alcohols, and it is preferable that two or more hydroxyl groups of the polyhydric alcohol are esterified. Therefore, polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol esters are esters having multiple hydroxyl groups.

[0034] Polyoxyalkylene group-containing hydroxy fatty acids have a structure in which a polyoxyalkylene group is bonded to the hydrocarbon group of a fatty acid via an oxygen atom, with the end of the polyoxyalkylene group that is not bonded to the hydrocarbon group of the fatty acid being a hydroxyl group. Examples of polyhydroxyesters include alkylene oxide adducts of esterified hydroxy fatty acids having 6 to 22 carbon atoms (preferably 12 to 22 carbon atoms) and polyhydric alcohols.

[0035] Examples of hydroxy fatty acids having 6 to 22 carbon atoms include hydroxycaprylic acid, hydroxycapric acid, hydroxyundecanoic acid, hydroxylauric acid, hydroxystearic acid, and ricinoleic acid, with hydroxystearic acid and ricinoleic acid being preferred. Examples of polyhydric alcohols include ethylene glycol, glycerin, sorbitol, sorbitan, trimethylolpropane, and pentaerythritol, with glycerin being preferred. Examples of alkylene oxides include alkylene oxides having 2 to 4 carbon atoms, such as ethylene oxide, propylene oxide, and butylene oxide.

[0036] The number of moles of alkylene oxide added is preferably 80 or less, and more preferably 5 to 30, per molar equivalent of the hydroxyl groups of the hydroxy fatty acid polyhydric alcohol ester. A number of moles exceeding 80 is undesirable because it may increase the amount of liquid return from the absorbent material. Furthermore, the proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, and more preferably 80 mol% or more. A proportion of ethylene oxide less than 50 mol% is undesirable because it may not provide sufficient durable water permeability to fibers or nonwoven fabrics.

[0037] Polyhydroxyesters can be produced, for example, by esterifying a polyhydric alcohol with a hydroxy fatty acid (hydroxymonocarboxylic acid) under normal conditions to obtain an esterified product, and then adding an alkylene oxide to this esterified product. Polyhydroxyesters can also be suitably produced by using naturally obtained oils and fats such as castor oil, or hydrogenated castor oil obtained by adding hydrogen to castor oil, and further adding an alkylene oxide. When producing polyhydroxyesters, the molar equivalent of carboxyl groups of the hydroxy fatty acid per molar equivalent of hydroxyl groups of the polyhydric alcohol is preferably in the range of 0.5 to 1.

[0038] (An ester in which at least one hydroxyl group of a polyhydroxyester is encapsulated with a fatty acid) (N7) The present invention relates to an ester in which at least one hydroxyl group of a polyhydroxyester is sequestered with a fatty acid. The number of carbon atoms in the fatty acid that sequesters at least one hydroxyl group of the polyhydroxyester is preferably 10 to 50, and more preferably 12 to 36. The number of carbon atoms in the hydrocarbon group in the fatty acid may be distributed, the hydrocarbon group may be linear or branched, saturated or unsaturated, and may have a polycyclic structure. Examples of such fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, eicosanoic acid, behenic acid, lignoceric acid, nervonic acid, cerotic acid, montanic acid, melissic acid, and lanolinic acid, but stearic acid and behenic acid are preferred. When producing an ester of a condensate and a fatty acid, the molar equivalent of the carboxyl group of the fatty acid per molar equivalent of the hydroxyl group of the condensate is preferably in the range of 0.2 to 1, and more preferably 0.4 to 1. There are no particular limitations on the reaction conditions for esterification.

[0039] (A nonionic surfactant in which at least one hydroxyl group of a condensate of a polyhydroxyester and an unsaturated dicarboxylic acid is encapsulated with a fatty acid) (N8) Nonionic surfactants obtained by encapsulating at least one hydroxyl group of a condensate of a polyhydroxyester and an unsaturated dicarboxylic acid with a fatty acid are obtained by encapsulating at least one hydroxyl group of a condensate of a polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and a dicarboxylic acid with a fatty acid.

[0040] In the condensate of a polyhydroxyester and a dicarboxylic acid, the number of carbon atoms in the dicarboxylic acid is preferably 2 to 10, and more preferably 2 to 8. Examples of such dicarboxylic acids include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, and phthalic acid. Along with the dicarboxylic acid, other carboxylic acids such as lauric acid, oleic acid, stearic acid, behenic acid, and benzoic acid may be contained in amounts of 20% or less (preferably 10% or less). When producing the condensate of a polyhydroxyester and a dicarboxylic acid, the molar equivalent of carboxyl groups of the dicarboxylic acid per molar equivalent of hydroxyl groups of the polyhydroxyester is preferably in the range of 0.2 to 1, and more preferably 0.4 to 0.8. There are no particular limitations on the esterification method or reaction conditions, and known methods and ordinary conditions can be used.

[0041] The condensate of a polyhydroxyester and a dicarboxylic acid is an ester in which at least one hydroxyl group is sequestered with a fatty acid in the condensate of the polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and a dicarboxylic acid (hereinafter sometimes referred to as the condensate). The number of carbon atoms in the fatty acid that sequesters at least one hydroxyl group in the condensate is preferably 10 to 50, and more preferably 12 to 36. The number of carbon atoms in the hydrocarbon group in the fatty acid may be distributed, the hydrocarbon group may be linear or branched, saturated or unsaturated, and may have a polycyclic structure. Examples of such fatty acids include lauric acid, myristic acid, and palmitic acid. Examples of suitable fatty acids include acids, stearic acid, oleic acid, eicosanoic acid, behenic acid, lignoceric acid, nervonic acid, cerotic acid, montanic acid, melisic acid, and lanolin fatty acids, but stearic acid and behenic acid are preferred. When producing an ester of a condensate and a fatty acid, the molar equivalent of carboxyl groups of the fatty acid per molar equivalent of hydroxyl groups of the condensate is preferably in the range of 0.2 to 1, and more preferably 0.4 to 1. There are no particular limitations on the reaction conditions for esterification.

[0042] (Polyester-based nonionic surfactant) (N9) Polyester-based nonionic surfactants (N9) are compounds having a structure in which the following polycarboxylic acid and the following polyol are ester-bonded.

[0043] Polycarboxylic acids are divalent or greater carboxylic acids (excluding aromatic carboxylic acids) having 10 to 66 carbon atoms. Examples include sebacic acid, oleate dimers, erucate dimers, oleate trimers, and erucate trimers.

[0044] Among polycarboxylic acids, it is preferable that the dimer acid is a dimer acid of an unsaturated fatty acid having 18 to 22 carbon atoms, and more preferably that the dimer acid is a dimer acid of an unsaturated fatty acid having 18 carbon atoms.

[0045] A polyol is a dihydric or higher alcohol having a (poly)oxyalkylene group with 2 to 3 carbon atoms in its molecule. While polyols are not particularly limited as long as they are dihydric or higher alcohols and have a (poly)oxyalkylene group in their molecule, examples include polyalkylene glycols, polyoxyalkylene sorbitan, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene glycerin, polyoxyalkylene polyglycerin, polyoxyalkylene polyglycerin esters, and polyoxyalkylene-modified silicones, all composed of oxyethylene and / or oxypropylene units. Among these, polyalkylene glycols composed of oxyethylene and / or oxypropylene units are preferred. Examples of polyalkylene glycols composed of oxyethylene units and / or oxypropylene units include polyoxyethylene glycol, polypropylene glycol, and polyoxyethylene polyoxypropylene glycol.

[0046] Polyoxyethylene polyoxypropylene glycol may be in block form or random form. Among these, polyoxyethylene glycol is preferred. The number-average molecular weight of polyalkylene glycol is preferably 100 to 10000, more preferably 200 to 2000, and even more preferably 400 to 1000. In this invention, the number-average molecular weight refers to the value obtained by converting the measurement to polystyrene equivalent using the gel permeation chromatography (GPC) method under the following measurement conditions. (GPC measurement conditions) Equipment: Equipment name "HPLC LC-6A SYSTEM" (manufactured by SHIMAZU) Columns: "KF-800P (10mm x 4.6mmφ)", "KF-804 (300mm x 8mmφ)", "KF-802.5 (300mm x 8mmφ)", "KF-801 (300mm x 8mmφ)" (all manufactured by SHODEX) Mobile phase: Tetrahydrofuran (THF) Flow rate: 1.0ml / min Sample volume: 100 μl (100-fold dilution) Column temperature: 50℃ Calibration curve reference material: Polystyrene (PSt)

[0047] The polyester-based nonionic surfactant preferably has a weight-average molecular weight of 1,000 to 100,000, more preferably 2,000 to 50,000, even more preferably 3,000 to 30,000, and particularly preferably 5,000 to 10,000.

[0048] There are no particular limitations on the method or reaction conditions for producing the aforementioned polyester-based nonionic surfactant; known methods and conventional conditions can be used. For example, a polyester-based nonionic surfactant can be obtained by mixing a polycarboxylic acid and a polyol and reacting them under heating. Polycarboxylic acids and polyols may be used in combination of one or more of the above-mentioned components. Alternatively, polyester-based nonionic surfactants may be produced by reacting them with components other than polycarboxylic acids and polyols.

[0049] [Anionic surfactant (S)] An anionic surfactant (S) is an anionic surfactant that contains the element S. When used in combination with the above-mentioned nonionic surfactant (N), the handling properties and water permeability stability of the additive are simultaneously excellent. The iodine value of the anionic surfactant (S) is preferably 0 to 120 g I2 / 100 g, more preferably 5 to 80 g I2 / 100 g, and even more preferably 30 to 70 g I2 / 100 g, from the viewpoint of simultaneously providing excellent handling properties and daily stability of water permeability. The acid value of the anionic surfactant (S) is preferably 0 to 120 mg KOH / g, more preferably 3 to 80 mg KOH / g, and even more preferably 10 to 65 mg KOH / g, from the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability of the imparting agent.

[0050] Anionic surfactants (S) include sulfonic acid type and sulfate type. Examples of sulfonic acid types include dialkyl sulfosuccinic acid and / or its salt (S-1), monoalkyl sulfosuccinic acid and / or its salt, alkylbenzenesulfonic acid and / or its salt, alkyl sulfonic acid and / or its salt, and alkanoyl methyl tauride. Examples of sulfated forms include polyhydric alcohol fatty acid sulfates (S-2), alkyl sulfates, and polyoxyethylene alkyl sulfates.

[0051] Examples of sulfonic acid types include sodium hexylsulfonate, sodium 2-ethylhexylsulfonate, sodium octylsulfonate, tetrabutylphosphine hexanesulfonate, sodium dioctyl sulfosuccinate, sodium dihexyl sulfosuccinate, sodium di2-ethylhexyl sulfosuccinate, sodium didecyl sulfosuccinate, sodium ditridecyl sulfosuccinate, disodium monooctyl sulfosuccinate, disodium monohexyl sulfosuccinate, disodium mono2-ethylhexyl sulfosuccinate, disodium monodecyl sulfosuccinate, disodium monotridecyl sulfosuccinate, and sodium petroleum sulfonate. From the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability, sodium di2-ethylhexyl sulfosuccinate and sodium ditridecyl sulfosuccinate salts are preferred.

[0052] Sulfuric acid-type polyhydric alcohol fatty acid sulfate salts (S-2) include those having a structure obtained by sulfating and neutralizing polyhydric alcohol fatty acid ester (a). The sulfation method is not particularly limited, and known methods using fuming sulfuric acid, concentrated sulfuric acid, chlorosulfonic acid, sulfur trioxide gas, etc., can be used. The neutralization method is not particularly limited, and known methods can be used. Basic substances used for neutralization include alkali metal carbonates such as sodium carbonate and potassium carbonate, alkali metal bicarbonates such as sodium bicarbonate and potassium bicarbonate, alkali metal hydroxides such as sodium hydroxide, potassium hydroxide and lithium hydroxide, oxides and hydroxides of alkaline earth metals such as calcium oxide, calcium hydroxide, magnesium oxide and magnesium hydroxide, ammonia, mono, di and trialcanolamines with 2 to 4 carbon atoms in the hydroxyalkyl chain, primary, secondary and tertiary alkylamines with 1 to 4 carbon atoms in the alkyl chain, etc. Two or more basic substances may be used in combination.

[0053] The aforementioned polyhydric alcohol fatty acid ester (a) is formed when a polyhydric alcohol and a fatty acid are esterified. The compound is an ester compound having a combined structure, and may be either a synthetic or natural product.

[0054] The polyhydric alcohol used in the synthesis of the polyhydric alcohol fatty acid ester (a) is a polyhydric alcohol having two or more hydroxyl groups, and examples include diols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, and diethylene glycol; polyalkylene glycols such as polyethylene glycol, polypropylene glycol, and polyethylene-polypropylene glycol; glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, polyglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. From the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability of the imparting agent, glycerin and sorbitan are more preferred, and glycerin is even more preferred.

[0055] The fatty acids used in the synthesis of the polyhydric alcohol fatty acid ester (a) include, as unsaturated fatty acids, oleic acid, ricinoleic acid, and linolenic acid, and as saturated fatty acids, hydroxy fatty acids, or hydroxyunsaturated fatty acids, examples include acetic acid, propionic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, etc., lignoceric acid, nervonic acid, cerotic acid, montanic acid, melissic acid, lanolinic acid, hydroxycaprylic acid, hydroxycapric acid, hydroxyundecanoic acid, hydroxylauric acid, hydroxystearic acid, etc. Among these, ricinoleic acid, linolenic acid, and hydroxystearic acid are preferred.

[0056] The polyhydric alcohol fatty acid ester (a) exhibits better durable water permeability as its molecular weight increases. Therefore, the total number of carbon atoms in the polyhydric alcohol fatty acid ester (a) is preferably 23 or more, more preferably 27 or more, even more preferably 31 or more, and particularly preferably 39 or more. The preferred upper limit for the total number of carbon atoms in the polyhydric alcohol fatty acid ester (a) is 100, more preferably 90, and even more preferably 80. If the total number of carbon atoms in the polyhydric alcohol fatty acid ester (a) exceeds 100, the instantaneous water permeability may decrease.

[0057] Examples of natural polyhydric alcohol fatty acid esters (a) include beef tallow, pork tallow, horse tallow, sheep tallow, chicken tallow, whale oil, dolphin oil, sardine oil, cod oil, shark oil, castor oil, rapeseed oil, cottonseed oil, sesame oil, olive oil, soybean oil, coconut oil, palm oil, palm kernel oil, peanut oil, corn oil, and sunflower oil. Among these, beef tallow, castor oil, and rapeseed oil are preferred from the viewpoint of durable water permeability.

[0058] As the polyhydric alcohol fatty acid ester (a), in addition to the natural product, hydrogenated oils and semi-hydrogenated oils having a structure obtained by hydrogenating the natural product can also be mentioned, for example, hydrogenated coconut oil, hydrogenated palm oil, semi-hydrogenated palm oil, hydrogenated palm kernel oil, hydrogenated soybean oil, hydrogenated rapeseed oil, hydrogenated castor oil, hydrogenated beef tallow, semi-hydrogenated beef tallow, hydrogenated pork tallow, semi-hydrogenated sardine oil, hydrogenated sardine oil, hydrogenated cod oil, semi-hydrogenated cod oil, hydrogenated shark oil, semi-hydrogenated shark oil, etc.

[0059] The sulfate-type alkyl sulfate ester salt preferably has 1 to 30 alkyl groups, more preferably 4 to 22, and even more preferably 6 to 18. The alkyl groups may be linear or branched, saturated or unsaturated, aliphatic or aromatic, and may be distributed. The alkyl sulfate ester of the alkyl sulfate ester salt is not particularly limited, but examples include methyl sulfate, ethyl sulfate, butyl sulfate, hexyl sulfate, octyl sulfate, decyl sulfate, lauryl sulfate, cetyl sulfate, stearyl sulfate, and oleyl sulfate. From the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability of the imparting agent, lauryl sulfate, cetyl sulfate, stearyl sulfate, and oleyl sulfate are preferred, and lauryl sulfate, cetyl sulfate, stearyl sulfate, and oleyl sulfate are even more preferred. The salt of the alkyl sulfate ester salt of the present invention is not particularly limited, but examples include sodium salt, potassium salt, and ammonium salt.

[0060] The polyoxyalkylene alkyl sulfate salt preferably has 1 to 30 alkyl groups, more preferably 4 to 22, and even more preferably 6 to 18. The alkyl groups may be linear or branched, saturated or unsaturated, aliphatic or aromatic, and may be distributed. The polyoxyalkylene in the polyoxyalkylene alkyl sulfate salt of the present invention is polyoxyethylene and / or polyoxypropylene. When it is polyoxyethylene and / or polyoxypropylene, it may be a compound obtained by random addition polymerization or a compound obtained by block addition polymerization. From the viewpoint of productivity, a compound obtained by random addition polymerization is preferred. From the viewpoint of simultaneously having excellent handling properties of the additive and the daily stability of water permeability, the number of moles of polyoxyalkylene added is 1 to 40, preferably 2 to 30, more preferably 3 to 25, and even more preferably 4 to 20. The salt of the polyoxyalkylene alkyl sulfate salt is not particularly limited, but examples include sodium salts, potassium salts, and ammonium salts.

[0061] [Anionic surfactant (P)] Anionic surfactants (P) are anionic surfactants that contain the element P. When used in combination with the nonionic surfactant (N) described above, the anionic surfactant (P) simultaneously provides excellent handling properties and long-term stability of water permeability of the imparting agent. The anionic surfactant (P) must contain compound (A) represented by the above general formula (1) and compound (B) represented by the above general formula (2).

[0062] (Compound (A)) Compound (A) is the compound represented by the general formula (1) above. Compound (A), when used in combination with the surfactant (S) or nonionic surfactant (N) described later, has the function of simultaneously improving the handling properties and the daily stability of the water permeability of the imparting agent. In general formula (1), R is chosen because it is desirable to have both excellent handling properties and excellent daily stability of water permeability of the imparting agent. 1 A hydrocarbon group having 6 to 22 carbon atoms is preferred, a hydrocarbon group having 6 to 18 carbon atoms is more preferred, and a hydrocarbon group having 12 to 18 carbon atoms is even more preferred. R 1 R may be a linear or branched chain, but a linear chain is preferred from the viewpoint of achieving the effects of the present invention. 1 It may be saturated or unsaturated. AO is an oxyalkylene group having 2 to 4 carbon atoms, and from the viewpoint of exhibiting the effects of the present invention, AO having 2 carbon atoms is preferable. m is an integer between 0 and 15, and from the viewpoint of achieving the effects of this invention, it is preferably between 0 and 10, and more preferably between 0 and 8.

[0063] M 1 M is a hydrogen atom, an alkali metal, or an organic amine salt. 2 This is a hydrogen atom, an alkali metal, or an organic amine salt.

[0064] (Compound (B)) Compound (B) is the compound represented by the general formula (2) above. Compound (B), when used in combination with the nonionic surfactant (N), has the function of simultaneously improving the handling properties and the daily stability of the water permeability of the imparting agent. In general formula (2), R is chosen because it is desirable to have both excellent handling properties and excellent daily stability of water permeability of the imparting agent.2 and R 3 A hydrocarbon group having 6 to 22 carbon atoms is preferred, a hydrocarbon group having 6 to 18 carbon atoms is more preferred, and a hydrocarbon group having 12 to 18 carbon atoms is even more preferred. R 2 and R 3 R may be a linear or branched chain, but a linear chain is preferred from the viewpoint of achieving the effects of the present invention. 2 and R 3 It may be saturated or unsaturated. AO is an oxyalkylene group having 2 to 4 carbon atoms, and from the viewpoint of exhibiting the effects of the present invention, AO having 2 carbon atoms is preferable. m is an integer between 0 and 15, and from the viewpoint of achieving the effects of this invention, it is preferably between 0 and 10, and more preferably between 0 and 8.

[0065] M 1 This is a hydrogen atom, alkali metal, ammonium, phosphonium, organic amine salt, or quaternary ammonium salt. (AO) m If there are two of them, they may be the same or different.

[0066] (Compound (C)) Compound (C) is the compound represented by the general formula (3) above, and is an optional component included in the present invention. The present invention is preferable when compound (C) is included, as it simultaneously provides excellent handling properties and daily stability of water permeability of the imparting agent. In general formula (3), R is chosen because it offers both excellent handling properties and excellent daily stability of water permeability. 4 A hydrocarbon group having 6 to 22 carbon atoms is preferred, a hydrocarbon group having 6 to 18 carbon atoms is more preferred, and a hydrocarbon group having 12 to 18 carbon atoms is even more preferred. R 4 R may be a linear or branched chain, but a linear chain is preferred from the viewpoint of achieving the effects of the present invention. 4 It may be saturated or unsaturated. m is an integer between 0 and 15, and from the viewpoint of achieving the effects of this invention, it is preferably between 0 and 10, and more preferably between 0 and 8. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer from 0 to 15. 1 and M 2 Each of these is independently a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine salt, or a quaternary ammonium salt. Q is M 2 or (OA) m R 5 That is. R 5 R is a hydrocarbon group with 3 to 5 carbon atoms. 5 R may be a straight chain or a branched chain. 5 It may be saturated or unsaturated. Y is 1 or 2. M is present in the molecule. 2 or (AO) m If there are two or more of them, they may be the same or different.

[0067] [Compound (D)] Compound (D) is a compound represented by the following general formula (4), and the water permeability imparting agent of the present invention preferably contains compound (D) from the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability.

[0068] [ka] From the viewpoint of simultaneously having excellent handling properties and daily stability of water permeability of the additive, in the formula, R 6 , R 7 and R 8 Each of these is preferably a hydrocarbon group having 6 to 22 carbon atoms, with the upper limit of the carbon number being preferably 18, more preferably 16, and still more preferably 14, and the lower limit of the carbon number being preferably 6, more preferably 8, and still more preferably 12. Also, for example, 6 to 16 and 10 to 20 are preferred. R 6 , R 7 and R 8 R may be a linear or branched chain, but a linear chain is preferred from the viewpoint of achieving the effects of the present invention. 6 , R 7 and R 8 It may be saturated or unsaturated. R6 , R 7 and R 8 They can be the same or different.

[0069] AO is an oxyalkylene group having 2 to 4 carbon atoms, and from the viewpoint of exhibiting the effects of the present invention, AO having 2 carbon atoms is preferable. m is an integer between 0 and 15, and from the viewpoint of achieving the effects of this invention, it is preferably between 0 and 10, and more preferably between 0 and 8. (AO) m If there are two or more of them, they may be the same or different from each other.

[0070] Specific examples of compound (D) are not particularly limited, but include tri-2-ethylhexyl phosphate, tri(polyoxyethylene 8-mol added 2-ethylhexyl) phosphate, triisolauryl phosphate, tri(polyoxyethylene 9-mol added isolauryl) phosphate, triisostearyl phosphate, tri(polyoxyethylene 15-mol added isostearyl) phosphate, di-2-ethylhexyl monooctyl phosphate, and di(polyoxyethylene 8-mol added 2-ethylhexyl) monooctyl phosphate. Among these, tri-2-ethylhexyl phosphate, triisolauryl phosphate, and triisostearyl phosphate are preferred in terms of exhibiting the effects of the present invention. Furthermore, tri(polyoxyethylene 8-mol added 2-ethylhexyl) phosphate, tri(polyoxyethylene 9-mol added isolauryl) phosphate, and tri(polyoxyethylene 15-mol added isostearyl) phosphate are preferred in terms of exhibiting the effects of the present invention.

[0071] [Inorganic phosphate (salt) (IN)] The water permeability imparting agent of the present invention preferably contains inorganic phosphoric acid (salt) (IN) from the viewpoint of simultaneously having excellent handling properties and long-term stability of water permeability. Inorganic phosphoric acid (salt) (IN) is at least one selected from phosphoric acid, dihydrogen phosphate metal salts, dimetallic hydrogen phosphate salts, and trimetallic phosphate salts. Specifically, examples of dimetallic hydrogen phosphate monosaltes include monopotassium dihydrogen phosphate and monosodium dihydrogen phosphate; examples of dimetallic hydrogen phosphates include dipotassium hydrogen phosphate and disodium hydrogen phosphate; and examples of trimetallic phosphates include tripotassium phosphate and trisodium phosphate.

[0072] [Water permeability imparting agent] The iodine value of the non-volatile components of the water permeability imparter of the present invention is 0.5 to 100 gI2 / 100 g. Below 0.5 gI2 / 100 g, the handling properties of the imparter and the daily stability of its water permeability are insufficient, and above 100 gI2 / 100 g, water permeability and the daily stability of its water permeability are insufficient. From the viewpoint of simultaneously improving the handling properties of the permeability imparting agent and the daily stability of its permeability, the lower limit of the iodine value of the nonvolatile components of the permeability imparting agent is preferably 2 gI2 / 100g, more preferably 5 gI2 / 100g, and even more preferably 10 gI2 / 100g. From the viewpoint of simultaneously improving the handling properties of the permeability imparting agent and the daily stability of its permeability, the upper limit of the iodine value of the nonvolatile components of the permeability imparting agent is preferably 85 gI2 / 100g, more preferably 50 gI2 / 100g, and even more preferably 30 gI2 / 100g.

[0073] The acid value of the nonvolatile content of the water permeability imparter of the present invention is 0.5 to 100 mg KOH / g. Below 0.5 mg KOH / g, the handling properties of the imparter and the daily stability of water permeability are insufficient, and above 100 mg KOH / g, the handling properties of the imparter, water permeability, and the daily stability of water permeability are insufficient. From the viewpoint of simultaneously improving handling properties and the daily stability of water permeability, the lower limit of the acid value of the nonvolatile component of the water permeability imparter of the present invention is preferably 1.0 mg KOH / g, more preferably 3.0 mg KOH / g, and even more preferably 5.0 mg KOH / g. From the viewpoint of simultaneously improving the handling properties of the permeability imparter and the daily stability of the permeability imparter, the upper limit of the acid value of the nonvolatile component of the permeability imparter of the present invention is preferably 85 mg KOH / g, more preferably 55 mg KOH / g, and even more preferably 25 mg KOH / g.

[0074] The acid value of the non-volatile component of the water permeability imparter of the present invention may be adjusted as needed after mixing various components. In this case, the adjustment method is not particularly limited, and known methods can be used. Examples of basic substances used for adjustment include alkali metal carbonates such as sodium carbonate and potassium carbonate, alkali metal bicarbonates such as sodium bicarbonate and potassium bicarbonate, alkali metal hydroxides such as sodium hydroxide, potassium hydroxide and lithium hydroxide, oxides and hydroxides of alkaline earth metals such as calcium oxide, calcium hydroxide, magnesium oxide and magnesium hydroxide, ammonia, mono, di and trialcanolamines with 2 to 4 carbon atoms in the hydroxyalkyl chain, and primary, secondary and tertiary alkylamines with 1 to 4 carbon atoms in the alkyl chain. Two or more basic substances may be used in combination. Examples of acidic substances used for adjustment include sulfuric acid, phosphoric acid, acetic acid, lactic acid and citric acid. Two or more acidic substances may be used in combination.

[0075] From the viewpoint of simultaneously improving the handling properties of the water permeability imparter and the daily stability of water permeability, the total amount of phosphorus elements in the non-volatile components of the water permeability imparter of the present invention is preferably 0 to 15% by weight. The upper limit of the total phosphorus element content of the nonvolatile components of the water permeability imparter of the present invention is preferably 10% by weight, more preferably 9% by weight, and even more preferably 8% by weight, from the viewpoint of simultaneously providing excellent handling properties and long-term stability of water permeability. From the viewpoint of simultaneously improving handling properties and the daily stability of water permeability, the lower limit of the total phosphorus element content of the water permeability imparter of the present invention is preferably 0% by weight, more preferably 0.5% by weight, even more preferably 1.0% by weight, and particularly preferably 1.5% by weight.

[0076] The total amount of sulfur in the non-volatile components of the water permeability imparter of the present invention is 0 to 10% by weight, from the viewpoint of simultaneously improving the handling properties of the imparter and the daily stability of its water permeability. The upper limit of the total sulfur element content of the nonvolatile components of the water permeability imparter of the present invention is preferably 8% by weight, more preferably 6% by weight, and even more preferably 4% by weight, from the viewpoint of simultaneously providing excellent handling properties and long-term stability of water permeability. From the viewpoint of simultaneously improving the handling properties of the permeability imparter and the daily stability of its permeability, the lower limit of the total sulfur element content of the permeability imparter of the present invention is preferably 0% by weight, more preferably 0.3% by weight, even more preferably 0.6% by weight, and particularly preferably 1.0% by weight.

[0077] The sum of the total phosphorus and sulfur elements in the nonvolatile content of the water permeability imparter of the present invention is greater than 0% by weight and 25% by weight or less. From the viewpoint of exhibiting the effects of the present invention, 1.0 to 19.0% by weight is preferred, 1.5 to 13.0% by weight is more preferred, and 2.0 to 7.0% by weight is even more preferred.

[0078] (Measurement of iodine value) The measurement should be performed in accordance with the measurement method (iodine value (Wiiss-carbon tetrachloride method)) described in the "Standard Test Methods for Analysis of Fats and Oils (2013 Edition)" established by the Japan Oil Chemists' Society. A potentiometric titrator may also be used during titration.

[0079] (Measurement of acid value) The measurement should be performed in accordance with the measurement method (acid value (applicable to oils and fats)) described in the "Standard Test Methods for Analysis of Fats and Oils (2013 Edition)" established by the Japan Oil Chemists' Society. A potentiometric titrator may also be used during titration.

[0080] (Method for measuring phosphorus and sulfur content by ICP emission spectrometry) (1) Pretreatment An appropriate amount of the additive, or the non-volatile component of the additive, was weighed into a platinum crucible (adjusting the weighed amount so that it falls within the range of the calibration curve), and a 5 wt% potassium hydroxide ethanol solution was added and dissolved. The mixture was gradually heated on an electric heater until carbonized, and then ashed at 750°C. After cooling to room temperature, 0.5 g of alkaline flux (a 1:1 weight mixture of sodium carbonate and potassium carbonate) was added, and the temperature was gradually increased, and alkaline fusion was performed at 850°C for 10 minutes. After cooling to room temperature, the mixture was diluted to the final volume with ultrapure water and used as the measurement sample. (2) Calibration curve Calibration curves were created by subjecting pre-prepared 10 ppm and 100 ppm standard solutions with known phosphorus and sulfur concentrations to an ICP (ICP emission spectrometer, Shimadzu ICPS-8100). (3) Measurement The sample prepared in (1) above was subjected to ICP (Instrumentation Spectrometer: Shimadzu ICPS-8100, ICP emission spectrometer), and the phosphorus and sulfur content in the additive or the non-volatile content of the additive was measured using the calibration curve prepared in (2) above. When the additive is used as the sample, the ratio of the non-volatile content of the additive can be measured, and the phosphorus and sulfur content in the non-volatile content can be calculated using its weight ratio.

[0081] In this invention, the non-volatile components of the water permeability imparter refer to the oven-dried components obtained when the imparter is heat-treated to remove solvents and other substances and reach a constant weight. Methods for obtaining the non-volatile components include directly heat-treating the imparter, and solvent extraction from fibers or nonwoven fabrics that have been coated with the imparter and dried by heat treatment.

[0082] When obtaining non-volatile components by directly heat-treating a water permeability agent, spread 2.0 to 3.0 g of the water permeability agent evenly on an aluminum sheet, dry it at 110°C under infrared lamp irradiation, and collect the residue on the aluminum sheet when the fluctuation range of volatile components over 150 seconds reaches 0.15%.

[0083] When obtaining non-volatile components from fibers or nonwoven fabrics, the fibers to which the imparting agent is attached are washed with a washing solution such as hexane, methanol, or ethanol, and the solvent used for washing (the washing solvent containing the non-volatile components of the imparting agent) is dried and recovered. If the extracted substance contains components derived from fibers or nonwoven fabrics, the portion remaining after subtracting the content of these components is considered the non-volatile content of the additive. When analyzing the components of a chemical additive, the appropriate column and solvent are selected for the additive and its non-volatile components (including extracts from fibers and nonwoven fabrics). Each component is then fractionated using high-performance liquid chromatography, and the structure of each fraction is identified by further analysis using MS, NMR, elemental analysis, etc. If the non-volatile components of the additive include high-molecular-weight compounds, the identification of the components becomes easier by using techniques such as gel permeation chromatography (GPC) in combination.

[0084] The ratio of nonionic surfactant (N) to the nonvolatile content of the water permeability imparter of the present invention is preferably 1.0 to 95% by weight, from the viewpoint of simultaneously improving handling properties and the daily stability of water permeability. The upper limit of this ratio is more preferably 90% by weight, even more preferably 60% by weight, and particularly preferably 40% by weight. On the other hand, the lower limit of this ratio is more preferably 3.0% by weight, even more preferably 5.0% by weight, and particularly preferably 10% by weight. Also, for example, 3.0 to 90% by weight is more preferable, and 5.0 to 60% by weight is even more preferable.

[0085] When the water permeability imparting agent of the present invention contains an anionic surfactant (S) having the element S, the proportion of the anionic surfactant (S) in the water permeability imparting agent of the present invention is preferably 5 to 80% by weight, from the viewpoint of simultaneously providing excellent handling properties and daily stability of water permeability. The upper limit of this ratio is more preferably 75% by weight, even more preferably 70% by weight, and particularly preferably 60% by weight. On the other hand, the lower limit of this ratio is more preferably 8% by weight, even more preferably 13% by weight, and particularly preferably 15% by weight. Also, for example, 8 to 75% by weight is more preferably, and 13 to 70% by weight is even more preferably.

[0086] When the water permeability imparter of the present invention contains an anionic surfactant (P) having element P, the proportion of the anionic surfactant (P) in the water permeability imparter of the present invention is preferably 5 to 80% by weight, from the viewpoint of simultaneously providing excellent handling properties and long-term stability of water permeability. The upper limit of this ratio is more preferably 70% by weight, even more preferably 60% by weight, and particularly preferably 50% by weight. On the other hand, the lower limit of this ratio is more preferably 10% by weight, even more preferably 15% by weight, and particularly preferably 20% by weight. Also, for example, 10 to 70% by weight is more preferably, and 15 to 60% by weight is even more preferably.

[0087] The ratio of P1 to the sum of the peak areas P1 to P3 (P1+P2+P3) of the spectrum of the non-volatile component of the water permeability imparter of the present invention, measured by P-nuclear NMR, is preferably 40-100% from the viewpoint of simultaneously providing excellent handling properties and long-term stability of water permeability. P1: Peak area within the range of 0-10 ppm P2: Peak area within the range of -25 to -3 ppm P3: Peak area within the range of -3 to 0 ppm Compounds exhibiting peaks in the spectrum from -25 to 10 ppm tend to be assigned, from the low magnetic field side, primarily inorganic phosphoric acid or compound (A), compound (B), compound (D), and compound (C). A value of [P1 / (P1+P2+P3)] between 40% and 100% is preferable because it simultaneously provides excellent handling and water permeability stability of the imparting agent. The upper limit of the ratio of [P1 / (P1+P2+P3)] is preferably 90%, more preferably 80%, and even more preferably 75%, from the viewpoint of simultaneously providing excellent handling and water permeability stability of the imparting agent. On the other hand, the lower limit of [P1 / (P1+P2+P3)] is preferably 40%, more preferably 45%, and even more preferably 50%, from the viewpoint of simultaneously providing excellent handling and water permeability stability of the imparting agent. For example, 40-90% is preferable, 45-85% is preferable, and 50-75% is even more preferable. The method for measuring the peak areas of P1-P3 is as described in the next paragraph.

[0088] [A / (A+B+C+D+IN)] [A / (A+B+C+D+IN)] represents the ratio of the P-nuclear NMR integral value (A) attributed to compound (A) represented by the following general formula (1) to the sum of the P-nuclear NMR integral values ​​(A+B+C+D+IN) (hereinafter referred to as the sum of P-nuclear NMR integral values ​​(A+B+C+D+IN)) (the sum of P-nuclear NMR integral values ​​(A+B+C+D+IN)) attributed to compound (A) represented by the above general formula (1), the P-nuclear NMR integral value (A) attributed to compound (B) represented by the above general formula (2), the P-nuclear NMR integral value (A) attributed to compound (C) represented by the above general formula (3), and the P-nuclear NMR integral values ​​(A+B+C+D+IN) attributed to compound (D) and the above inorganic phosphate (IN). Compound (A) is, 31 It can be detected by P-NMR. Approximately 30 mg of the non-volatile content of the sample to be measured is weighed into a 5 mm diameter NMR sample tube, and approximately 0.5 ml of heavy water (D2O) or deuterated chloroform (CDCl3) is added as the deuterated solvent to dissolve it. 31 Measurements were taken using P-NMR analyzers (BRUKER AVANCE400, 162MHz and JEOL JNM-ECZ400R, 162MHz). From the viewpoint of achieving the effects of this invention, the lower limit of [A / (A+B+C+D+IN)] is preferably 20%, 22%, 25%, and 30%, in that order (the later values ​​are preferred, and the same applies hereafter). From the viewpoint of achieving the effects of this invention, the upper limit of [A / (A+B+C+D+IN)] is preferably in the order of 98%, 95%, 92%, 90%, and 80%.

[0089] From the viewpoint of achieving the effects of this invention, the lower limit of [B / (A+B+C+D+IN)] is preferably in the order of 1%, 3%, 5%, and 7%. From the viewpoint of achieving the effects of this invention, the upper limit of [B / (A+B+C+D+IN)] is preferably in the order of 65%, 50%, 40%, and 30%.

[0090] [C / (A+B+C+D+IN)] represents the ratio of the P-nuclear NMR integral value (C) attributed to the above compound (C) to the sum of the P-nuclear NMR integral values ​​(A+B+C+D+IN). From the viewpoint of achieving the effects of this invention, the lower limit of [C / (A+B+C+D+IN)] is preferably in the order of 0%, 4%, 8%, and 10%. From the viewpoint of achieving the effects of this invention, the upper limit of [C / (A+B+C+D+IN)] is preferably 40%, 30%, and 20%, in that order.

[0091] [D / (A+B+C+D+IN)] represents the ratio of the P-nuclear NMR integral value (D) attributed to the above compound (D) to the sum of the P-nuclear NMR integral values ​​(A+B+C+D+IN). From the viewpoint of achieving the effects of this invention, the lower limit of [D / (A+B+C+D+IN)] is preferably in the order of 0%, 4%, 8%, and 10%. From the viewpoint of achieving the effects of this invention, the upper limit of [D / (A+B+C+D+IN)] is preferably in the order of 10%, 5%, 4%, 2%, and 0%.

[0092] [IN / (A+B+C+D+IN)] represents the ratio of the P-nuclear NMR integral value (IN) attributed to the inorganic phosphate (IN) to the sum of the P-nuclear NMR integral values ​​(A+B+C+D+IN). From the viewpoint of achieving the effects of this invention, the lower limit of [IN / (A+B+C+D+IN)] is preferably in the order of 0%, 0.1%, 0.5%, and 1%. From the viewpoint of achieving the effects of this invention, the upper limit of [IN / (A+B+C+D+IN)] is preferably in the order of 10%, 5%, 4%, 2%, and 0%.

[0093] The weight ratio of anionic surfactant to the total of anionic and nonionic surfactants in the water permeability imparting agent [anion / (anion + nonion)] is preferably 5 to 99% by weight from the viewpoint of achieving the effects of the present invention. The lower limit of the weight ratio of anionic surfactant to the total of anionic and nonionic surfactants in the water permeability imparting agent [anion / (anion + nonion)] is more preferably 10% by weight, even more preferably 40% by weight, and particularly preferably 60% by weight. The upper limit is more preferably 97% by weight, even more preferably 95% by weight, and particularly preferably 90% by weight. The pH of a 1% aqueous solution of the non-volatile components of the water permeability imparter is preferably 4.0 to 11.0, more preferably 5.0 to 10.0, and even more preferably 6.0 to 9.0, from the viewpoint of simultaneously providing excellent handling properties of the imparterer and stable water permeability over time.

[0094] The water permeability imparting agent of the present invention is preferable because it exhibits greater effectiveness when used for menstrual blood permeability.

[0095] From the viewpoint of achieving the effects of the present invention, the concentration of nonvolatile components of the water permeability imparting agent is preferably 40 to 100% by weight, more preferably 45 to 95% by weight, and even more preferably 50 to 90% by weight.

[0096] From the viewpoint of achieving the effects of the present invention, the ratio of the silicone compound to the nonvolatile content of the water permeability imparter is preferably less than 25% by weight, 15% by weight or less, 5% by weight or less, 3% by weight or less, less than 1% by weight, and 0% by weight, in that order.

[0097] 〔fiber〕 The fiber of the present invention is formed by applying the above-mentioned water-permeability imparting agent to the fiber body. The fiber of the present invention may be a short fiber or a long fiber, but a short fiber is preferable in terms of water permeability. The adhesion rate of the non-volatile components of the water-permeability agent to the fiber body is preferably 0.03 to 2% by weight, and more preferably 0.1 to 1% by weight, relative to the fiber body, in terms of antistatic properties and water permeability.

[0098] Examples of fiber materials include polyolefin fibers, polyester fibers, nylon fibers, PVC fibers, and composite fibers made of two or more thermoplastic resins. Examples of composite fiber combinations include, in the case of polyolefin resin / polyolefin resin, high-density polyethylene / polypropylene, linear high-density polyethylene / polypropylene, low-density polyethylene / polypropylene, binary or ternary copolymer of propylene and other α-olefins / polypropylene, linear high-density polyethylene / high-density polyethylene, and low-density polyethylene / high-density polyethylene. Examples of polyolefin resin / polyester resin combinations include polypropylene / polyethylene terephthalate, high-density polyethylene / polyethylene terephthalate, linear high-density polyethylene / polyethylene terephthalate, and low-density polyethylene / polyethylene terephthalate. Examples of polyester resin / polyester resin combinations include copolymerized polyester / polyethylene terephthalate. Furthermore, fibers made of polyamide resin / polyester resin, polyolefin resin / polyamide resin, etc., can also be exemplified. Among these fiber materials, the water permeability imparter of the present invention is particularly suitable for hydrophobic synthetic fibers such as polyolefin fibers (polyolefin fibers and composite fibers containing polyolefin fibers) and polyester fibers (polyester fibers and composite fibers containing polyester fibers), due to the preference for their soft texture. Furthermore, the water permeability imparter of the present invention is particularly suitable for polyolefin fibers. Furthermore, these fibers are preferable in terms of water permeability if they are fibers used for manufacturing nonwoven fabrics.

[0099] Examples of fiber cross-sectional structures include sheath-core type, parallel type, eccentric sheath-core type, multilayer type, radial type, or sea-island type. However, due to productivity in the fiber manufacturing process and ease of nonwoven fabric processing, sheath-core type including eccentricity or parallel type are preferred. Furthermore, the cross-sectional shape can be circular or irregular. In the case of irregular shapes, any shape is possible, such as flattened, polygonal (triangular to octagonal), T-shaped, hollow, or multi-lobed.

[0100] The water permeability imparting agent of the present invention may be applied directly to the fiber body without dilution, or it may be diluted with water or the like to a concentration where the weight percentage of non-volatile content is 0.5 to 5% by weight before being applied to the fiber body. The process of applying the water permeability imparting agent to the fiber body may be any of the processes of the fiber body, such as spinning, drawing, or crimping. There are no particular limitations on the means of applying the water permeability imparting agent of the present invention to the fiber body, and methods such as roller lubrication, nozzle spray lubrication, and dip lubrication may be used. A method that can obtain the desired amount of application more uniformly and efficiently may be adopted in accordance with the fiber manufacturing process and its characteristics. Furthermore, as a drying method, methods such as drying with hot air and infrared rays, or drying by contact with a heat source may be used.

[0101] [Nonwoven fabric] The nonwoven fabric of the present invention may be obtained by adding a water permeability agent to a raw nonwoven fabric that has not been treated with a water permeability agent, or by using fibers treated with a water permeability agent to produce a nonwoven fabric. There are no particular limitations on the method for producing the nonwoven fabric of the present invention, and known methods can be used. Short fibers or long fibers can be used as raw fibers. Examples of web formation methods for short fibers include dry methods such as the carding method and the airlaid method, and wet methods such as the papermaking method. Examples of web formation methods for long fibers include the spunbond method, the meltblown method, and the flash spinning method. Examples of interfiber bonding methods include the chemical bond method, the thermal bond method, the needle punch method, the spunlace method, and the stitch bond method. The method for producing the nonwoven fabric of the present invention preferably includes the steps of passing the fibers of the present invention through a carding machine or the like to produce a fiber web, and then heat-treating the obtained fiber web. In other words, the water permeability imparting agent of the present invention is particularly suitable for use when the manufacturing of the nonwoven fabric includes a step of heat-treating the fiber web. Methods for joining fiber webs by heat treatment include thermal compression bonding using heated rolls or ultrasonic waves, thermal fusion using heated air, and point bonding. As an example of joining fiber webs by heat treatment, in the case of a sheath-core type composite fiber using a high-melting-point resin for the core and a low-melting-point resin for the sheath, heat treatment near the melting point of the low-melting-point resin can easily perform thermal bonding of the fiber intersections. As for the manufacturing method of nonwoven fabric, there are methods such as passing short fibers treated with a water permeability agent through a carding machine or the like to form a web, and then heat-treating and bonding them together as described above, and a method in which the water permeability fibers (short fibers) of the present invention are mixed with pulp or the like when laminating using the airlaid method, and then heat-treating and bonding them together as described above. In addition, there are methods for manufacturing nonwoven fabric by attaching the water permeability agent of the present invention to a molded fiber body obtained by the spunbond method, melt-blown method, flash spinning method, etc., and then heat-treating it with a heated roll or heated air, or by attaching the water permeability agent of the present invention to a material that has been heat-treated with a heated roll or heated air, etc.

[0102] One example of the spunbond method involves spinning a composite fiber resin, then cooling the spun composite filament with a cooling fluid, and applying tension to the filament with stretched air to achieve the desired fineness. Subsequently, the spun filament is collected on a collection belt and subjected to bonding to obtain a spunbond nonwoven fabric. Bonding methods include thermocompression bonding using heated rolls or ultrasound, thermal fusion using heated air, and point bonding. The method for applying the water-permeability imparting agent of the present invention to the obtained spunbond nonwoven fabric can be a roll coating method such as gravure, flexographic, or gate roll method, or a spray coating method, but is not particularly limited as long as the amount applied to the nonwoven fabric can be adjusted on each side. Furthermore, as a drying method, methods such as drying with hot air and infrared rays, or drying by contact with a heat source may be used.

[0103] [Absorbent articles] The absorbent article of the present invention includes the nonwoven fabric of the present invention. Examples of the absorbent article of the present invention include disposable diapers and sanitary napkins (sanitary napkins, etc.). In the absorbent article of the present invention, the nonwoven fabric of the present invention is preferably used as a top sheet for sanitary materials such as disposable diapers and sanitary napkins. It can also be used in second seats, absorbent materials, and absorbent pads. [Examples]

[0104] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the examples described herein. In the following examples, "percent (%)" and "parts" refer to "weight %" and "parts by weight" respectively, unless otherwise specified. In the examples and comparative examples, the evaluation of each property of the water permeability imparter was carried out according to the following method.

[0105] (Examples 1-36 and Comparative Examples 1-7) The components shown in Tables 4-9 are the same as those in Tables 1 and 2, and as follows. The acid values ​​of N-1 to N-5, 7, 8, 15, and 17 to N-20 in Table 2 originate from fatty acids that remained unreacted during the esterification reaction. Additionally, ester compounds may contain small amounts of different partial or complete ester compounds as by-reactants. Substances with the same name but different iodine values ​​in Table 2 are due to the purity of the unsaturated fatty acids. Furthermore, p-1 to p-12 shown in Tables 4 to 9 are present in the integral ratios shown in Table 3.

[0106] [Table 1]

[0107] [Table 2]

[0108] A-1: General formula (1) compound, R 1 =n-hexyl group, m=0, M 1 :H or K, M 2 :H or K A-2: General formula (1) compound, R 1 = n-octyl group, m = 0, M 1 : H or K, M 2 : H or K A-3: General formula (1) compound, R 1 = lauryl group, m = 0, M 1 : H or K, M 2 : H or K A-4: General formula (1) compound, R 1 = lauryl group, m = 0, M 1 : H or K, M 2 : H or K A-5: General formula (1) compound, R 1 = lauryl group, m = 0, M 1 : H or K, M 2 : H or K A-6: General formula (1) compound, R 1 = stearyl, cetyl group, m = 0, M 1 : H or K, M 2 : H or K A-7: General formula (1) compound, R 1 = stearyl group, m = 0, M 1 : H or K, M 2 : H or K A-8: General formula (1) compound, R 1 = stearyl group, m = 0, M 1 : H or K, M 2 : H or K A-9: General formula (1) compound, R 1 = oleyl group, m = 0, M 1 : H or K, M 2 : H or K B-1: General formula (2) compound, R 2 = n-hexyl group, R 3 = n-hexyl group, m = 0, M 1 : H or K B-2: General formula (2) compound, R 2 = n-octyl group, R 3 = n-octyl group, m = 0, M 1 : H or K B-3: General formula (2) compound, R 2 = lauryl group, R 3= lauryl group, m=0, M 1 :H or K B-4: General formula (2) compound, R 2 = Lauryl group, R 3 = lauryl group, m=0, M 1 :H or K B-5: General formula (2) compound, R 2 = Lauryl group, R 3 = lauryl group, m=0, M 1 :H or K B-6: General formula (2) compound, R 2 =Stearyl, cetyl group, R 3 =Stearyl, cetyl group, m=0, M 1 :H or K B-7: General formula (2) compound, R 2 = stearyl group, R 3 = stearyl group, m=0, M 1 :H or K B-8: General formula (2) compound, R 2 = stearyl group, R 3 = stearyl group, m=0, M 1 :H or K B-9: General formula (2) compound, R 2 =Oleyl group, R 3 =Oleyl group, m=0, M 1 :H or K C-1: General formula (3) compound, R 4 =n-hexyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-2: General formula (3) compound, R 4 =n-octyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-3: General formula (3) compound, R 4 = lauryl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-4: General formula (3) compound, R 4 = lauryl group, m=0, M1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-5: General formula (3) compound, R 4 = lauryl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-6: General formula (3) compound, R 4 =Stearyl, cetyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-7: General formula (3) compound, R 4 = stearyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-8: General formula (3) compound, R 4 = stearyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 C-9: General formula (3) compound, R 4 =Oleyl group, m=0, M 1 :H or K, M 2 :H or K, Y=1, Q=M 2 D-1 Tri-n-hexyl phosphate D-2 Trin-octylphosphate D-3 Trilaurylphosphate D-4 Trilaurylphosphate D-5 Trilaurylphosphate D-6 Tristearyl cetylphosphate D-7 Tristeryl phosphate D-8 Tristeryl phosphate D-9 Trioleilphosphate

[0109] Each component shown in Tables 4-9 and water were mixed to prepare aqueous solutions of the permeability imparters for Examples 1-36 and Comparative Examples 1-7, each containing 50% by weight of non-volatile content in the total permeability imparter. The obtained permeability imparters were each diluted with warm water at approximately 60°C to obtain diluted solutions with a concentration of 0.9% by weight of non-volatile content. Next, 150g of diluted solution of each water permeability agent was applied to 300g of fiber body using the dip application method, and the amount of non-volatile water permeability agent adhering to the water permeable fiber was set to 0.45% by weight. The fiber body was a polypropylene (core)-polyethylene (sheath) composite fiber without any fiber treatment agents such as water permeability agents attached, with a single fiber fineness of 2.2 Dtex and a fiber length of 38 mm. The fibers to which the diluted solutions of each water permeability agent were applied were placed in an 80°C hot air dryer for 2 hours, and then left to dry at room temperature for 8 hours or more to obtain water permeable fibers.

[0110] The resulting permeable fibers were subjected to a fiber opening process and a carding process using a carding test machine, resulting in a basis weight of 25 g / m². 2 A web was prepared. The obtained web was heat-treated at 135°C in an air-through type hot air circulation dryer to fix the web and obtain a nonwoven fabric. The water permeability of the obtained nonwoven fabric was evaluated using the evaluation method shown below. The results are shown in Tables 4 to 9.

[0111] [Handling] Handling performance was evaluated based on the following criteria for the properties of the compounded product: 1) no product separation occurs, and 2) fluidity is maintained. The evaluation was performed on a 50% aqueous solution of a water permeability imparting agent. A score of ○ or higher was considered acceptable. 〔Judgment criteria〕 ◎ (Excellent): Successfully achieves both 1) and 2). ○+ (Good): Either 1) or 2) is slightly inferior, but the product is still at an acceptable level. ○ (Acceptable): Both 1) and 2) are slightly inferior, but the product is still at an acceptable level. △ (Poor): Either 1) or 2) is significantly inferior. × (Not acceptable): Both 1) and 2) are significantly inferior.

[0112] [Water permeability of nonwoven fabrics] (Instant water permeability of nonwoven fabric) A nonwoven fabric is placed on top of filter paper (Toyo Filter Paper, No. 5), and one drop (approximately 0.05 ml) of artificial urine is dropped from a burette placed 10 mm above the surface of the nonwoven fabric. The time it takes for the water droplet to disappear from the surface of the nonwoven fabric is measured. This measurement is performed at 20 locations on the surface of the nonwoven fabric, and the number of droplets that disappear in less than 5 seconds is displayed. The number is evaluated according to the following criteria. ◎ is the best evaluation, and ○ or higher indicates that it is suitable for practical use. 〔Judgment criteria〕 ◎(Good)…18~20 pieces 〇(possible)…11~17 pieces △(Not possible)…1 to 10 pieces

[0113] (Durable water permeability of nonwoven fabric) Following the EDANA Repeated Liquid Strike-Through Time method, 0.9% physiological saline solution was permeated through a nonwoven fabric (10cm x 10cm), and the permeation time was measured. After permeation, the nonwoven fabric was sandwiched between two sheets of filter paper (Toyo Filter Paper, No. 5), a board (10cm x 10cm) and a weight (500g) were placed on top, and it was left for 3 minutes to dewater, and then air-dried for a further 5 minutes. The same procedure is repeated for the nonwoven fabric used in the test. In this repeated test, it is desirable for the water permeability time to remain short even after multiple repetitions. The evaluation is performed according to the following criteria. Note that ◎ is the best evaluation, and ○ or higher indicates that the fabric is suitable for practical use. 〔Judgment criteria〕 ◎(Good)... Less than 3 seconds of water permeability continues for the first 4 passes. ○ (Acceptable)... Less than 3 seconds of water permeation continues for the 2nd to 3rd pass. △ (Not acceptable)... Indicates that the first water permeation cycle is less than 3 seconds.

[0114] (Evaluation of the daily stability of water permeability) A nonwoven fabric (10cm x 10cm) is stored in an environmental testing chamber at 60°C and 80% RH for 14 days. After 14 days, the nonwoven fabric is removed from the environmental testing chamber, and its instantaneous and durable water permeability are evaluated as described above. The smaller the difference between the instantaneous and durable water permeability before and after being placed in the environmental testing chamber, the smaller the decrease in water permeability over time. A smaller decrease over time is desirable. The evaluation of instantaneous and durable water permeability after several days is performed according to the following criteria. Note that ◎ is the best evaluation, and ○ or higher indicates that the fabric is suitable for practical use. (Instantaneous water permeability after several days) 〔Judgment criteria〕 ◎(Good)…14~20 pieces 〇(possible)…9 to 13 pieces △(defective)…1 to 8 pieces ×(Not possible)… 0 pieces (Durable water permeability over time) 〔Judgment criteria〕 ◎(Good)... Less than 3 seconds of water permeability continues for the first 3 cycles. ○ (Acceptable)... The water permeation time remains less than 3 seconds until the second time. △ (Poor) ... Shows a water permeability of less than 3 seconds only for the first pass. × (Not allowed) ... The first pass of water permeation exceeds 3 seconds.

[0115] (Blood permeability) As an example of an absorbent material, the evaluation was conducted using a sanitary napkin (Sofy Hadaomoi, manufactured by Unicharm Corporation) with the surface sheet removed, and a nonwoven fabric sample layered in its place, with the edges secured. Acrylic plates with perforations of 1 cm inner diameter were stacked, and 5.0 g of defibroused horse blood (adjusted to 10 mPa / s), equivalent to menstrual blood, was poured through the perforations. The acrylic plates were removed 60 seconds after the total of 5.0 g of defibroused horse blood had been poured in. The L value at the location where the defibroused horse blood was introduced was measured using a Konica Minolta CR-400 colorimeter. The higher the L value (brightness), the closer the color is to white, and the less redness is visible on the surface sheet (nonwoven fabric sample). In other words, it indicates the blood permeability between fibers. ◎ is the best evaluation, and ○ or higher indicates that it is suitable for practical use. 〔Judgment criteria〕 ◎ (Good) ... L value is 60 or higher ○ (OK) ... Indicates an L value of 50 or more and less than 60. △ (Not acceptable) ... Indicates an L value of less than 50

[0116] [Table 3]

[0117] [Table 4]

[0118] [Table 5]

[0119] [Table 6]

[0120] [Table 7]

[0121] [Table 8]

[0122] [Table 9]

[0123] As can be seen from Tables 4 to 8, the water permeability imparters of Examples 1 to 36 are water permeability imparters comprising a nonionic surfactant (N) and at least one selected from an anionic surfactant having an S element (S) and an anionic surfactant having a P element (P), and since the iodine value of the nonvolatile components of the water permeability imparter is within a specific range and the acid value is within a specific range, the problem of the present invention is solved. Furthermore, it was confirmed that the effects of the present invention are also exhibited in diapers and sanitary products in which the nonwoven fabric produced in the examples is applied as a surface sheet. On the other hand, as can be seen from Table 9, when the acid value is not within a specific range (Comparative Examples 1, 2, 6, and 7), or when the iodine value is not within a specific range (Comparative Examples 3, 4, and 5), the problem of either water permeability over time or the stability of the imparting agent, which is the issue of this application, has not been resolved. [Industrial applicability]

[0124] Fibers and nonwoven fabrics treated with the water permeability imparting agent of the present invention are used in absorbent articles such as sanitary products, including disposable diapers and napkins. They can also be used in food, medical, and industrial applications where absorbent sheets are required.

Claims

1. A water permeability imparter comprising a nonionic surfactant (N), and at least one selected from an anionic surfactant having an S element (S) and an anionic surfactant having a P element (P), wherein the iodine value of the nonvolatile components of the water permeability imparterer is 0.5 to 100 gI ２ A water permeability imparting agent with an acid value of 0.5 to 100 mg KOH / g per 100g.

2. The water permeability imparting agent according to claim 1, wherein the water permeability imparting agent comprises the activator (P), and the activator (P) essentially comprises compound (A) represented by the following general formula (1) and compound (B) represented by the following general formula (2), and optionally comprises compound (C) represented by the following general formula (3). 【Chemistry 1】 (In the formula, R １ R is a hydrocarbon group having 6 to 22 carbon atoms. １ The chain may be straight or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer from 0 to 15. １ This is a hydrogen atom, an alkali metal, or an organic amine salt. ２ (This is a hydrogen atom, an alkali metal, or an organic amine salt.) 【Chemistry 2】 (In the formula, R ２ and R ３ are hydrocarbon groups having 6 to 22 carbon atoms. R ２ and R ３ may be linear or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 15. M １ is a hydrogen atom, an alkali metal or an organic amine salt. When there are two (AO) ｍ in the molecule, they may be the same or different from each other.) 【Transformation 3】 (In the formula, R ４ R is a hydrocarbon group having 6 to 22 carbon atoms. ４ The chain may be straight or branched. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer from 0 to 15. １ This is a hydrogen atom, an alkali metal, or an organic amine salt. ２ Q is a hydrogen atom, an alkali metal, or an organic amine salt. ２ or (OA) ｍ R ５ That is. R ５ R is a hydrocarbon group having 6 to 22 carbon atoms. ５ The chain may be straight or branched. Y is 1 or 2. M is present in the molecule. ２ or (AO) ｍ If there are two or more of them, they may be the same or different.

3. The water permeability imparting agent according to claim 1, comprising the surfactant (S), wherein the surfactant (S) comprises at least one selected from dialkyl sulfosuccinic acid and dialkyl sulfosuccinate (S-1) and polyhydric alcohol fatty acid sulfate and polyhydric alcohol fatty acid sulfate salt (S-2).

4. The water permeability imparting agent according to claim 1, wherein the total amount of phosphorus elements in the nonvolatile content is 0 to 15% by weight and / or the total amount of sulfur elements is 0 to 10% by weight.

5. A water permeability imparting agent according to claim 1, for use in menstrual blood nonwoven fabrics.

6. The water permeability imparting agent according to claim 1, wherein the water permeability imparting agent comprises the surfactant (P), and the surfactant (P) essentially comprises a surfactant (P-1) having an alkyl group having 12 to 18 carbon atoms and / or an alkenyl group having 12 to 18 carbon atoms, and a surfactant (P-2) having an alkyl group having 10 or fewer carbon atoms and / or an alkenyl group having 10 or fewer carbon atoms.

7. A fiber having been obtained by applying a water permeability imparting agent according to any one of claims 1 to 6 to a raw material fiber.

8. A nonwoven fabric to which a water permeability imparting agent according to any one of claims 1 to 6 is applied.

9. An absorbent article comprising the nonwoven fabric of claim 8.

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