JP2021152237A - Loose stool permeability imparting agent, fiber, non-woven fabric and water-absorbent article - Google Patents

Abstract

To provide a loose stool permeability imparting agent capable of obtaining a top sheet of an absorbent article having excellent loose stool permeability.SOLUTION: A loose stool permeability imparting agent of the present invention contains at least one kind of surfactant (A) selected from the group consisting of a nonionic surfactant (A1) having an amide group and/or an amino group and a betaine-type amphoteric surfactant (A2) having an alkyl group having 6-24 carbon atoms and/or an alkenyl group having 6-24 carbon atoms. The chemical formula weight or number average molecular weight of the surfactant (A) is preferably 200 to 1000, and the HLB value of the nonionic surfactant (A1) is preferably 7 to 17.SELECTED DRAWING: None

Description

The present invention relates to loose stool permeability imparting agents, fibers, non-woven fabrics and water-absorbent articles.

In general, absorbent articles such as disposable diapers and sanitary napkins have a structure in which an absorber made of cotton-like pulp, a superabsorbent polymer substance, or the like is arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet. It has become.
Excrement (urine, loose stool, etc.) penetrates the top sheet and is absorbed by the absorber. In recent years, improvement of topsheet permeability of excrement causing discomfort has been required, and at this time, a treatment agent for improving urine topsheet permeability is known in order to reduce discomfort (Patent Documents). 1 and 2 etc.).
However, the top sheet treated with the above-mentioned treatment agent does not have sufficient permeability of loose stool, and in addition to the above-mentioned treatment agent, a treatment agent for improving the permeability of loose stool of the top sheet has been required.

Japanese Patent No. 6412172 Japanese Patent No. 6322040

An object of the present invention is to provide a loose stool permeability imparting agent capable of obtaining a top sheet of an absorbent article having excellent loose stool permeability.

The present inventors have arrived at the present invention as a result of diligent studies to solve the above problems.
That is, the present invention relates to a nonionic surfactant (A1) having an amide group and / or an amino group, and a betaine-type amphoteric surfactant having an alkyl group having 6 to 24 carbon atoms and / or an alkenyl group having 6 to 24 carbon atoms. A loose stool permeability-imparting agent containing at least one surfactant (A) selected from the group consisting of (A2); the loose stool permeability-imparting agent is a fiber attached to a hydrophobic fiber, and the loose stool permeability-imparting agent is attached. A fiber in which the weight ratio of the non-volatile component of the imparting agent is 0.02 to 2% by weight based on the weight of the hydrophobic fiber; a non-woven fabric using the fiber; a water-absorbent article using the non-woven fabric.

The non-woven fabric using the fiber to which the loose stool permeability imparting agent of the present invention is attached is excellent in loose stool permeability.

The loose stool permeability imparting agent of the present invention is a nonionic surfactant (A1) having an amide group and / or an amino group, and a betaine having an alkyl group having 6 to 24 carbon atoms and / or an alkenyl group having 6 to 24 carbon atoms. It contains at least one type of surfactant (A) selected from the group consisting of type amphoteric surfactant (A2) as an essential component.
In the present invention, the loose stool includes stool in which the weight ratio of water to the weight of the stool is 80% by weight or more.

Examples of the nonionic surfactant (A1) having an amide group and / or an amino group include an amide (A11) of a fatty acid having 6 to 24 carbon atoms and a compound having a hydroxyl group and an amino group and having 2 to 10 carbon atoms. The alkylene oxide adduct (A12) having 2 to 4 carbon atoms of (A11) and the alkylene oxide adduct having 2 to 4 carbon atoms of an aliphatic amine having 6 to 24 carbon atoms and having an amino group (A13). ) Etc. can be mentioned.

Examples of the fatty acid having 6 to 24 carbon atoms in the amide (A11) include hexanoic acid, heptanic acid, octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid and eicosanoic acid. Examples thereof include docosanoic acid and tetraconic acid.
The fatty acids having 6 to 24 carbon atoms in the amide (A11) include fatty acids derived from natural fats and oils [fatty acid derived from vegetable fats and oils (palm oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid, olive oil fatty acid, rice bran oil fatty acid). , Rice germ oil fatty acid, rapeseed oil fatty acid, castor oil fatty acid, hydrogenated castor oil fatty acid, etc.) and animal fat-derived fatty acid (beef fat fatty acid, hydrogenated beef fat fatty acid, pig fat fatty acid, etc.)] may be used.
Fatty acids derived from natural fats and oils are generally saturated fatty acids having 8, 10, 12, 14, 16, 18, 20, 22 and 24 carbon atoms and / or unsaturated fatty acids having 16, 18, 20 and 22 carbon atoms. It is a mixture.
Of the fatty acids having 6 to 24 carbon atoms, fatty acids derived from vegetable fats and oils are preferable from the viewpoint of skin safety, and coconut oil fatty acids (octanoic acid, decanoic acid, etc.) are more preferable from the viewpoint of loose stool permeability. A mixture of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, etc.).

Examples of the compound having 2 to 10 carbon atoms having a hydroxyl group and an amino group include monoethanolamine and diethanolamine.

The amide (A11) is the fatty acid having 6 to 24 carbon atoms [or an ester of the fatty acid having 6 to 24 carbon atoms and an alcohol having 1 to 4 carbon atoms (methanol, etc.)], and the hydroxyl group. It can be produced by reacting a compound having 2 to 10 carbon atoms having an amino group by a known method.
The above-mentioned amide (A11) may be used alone or in combination of two or more.

The alkylene oxide adduct (A12) is preferably a compound obtained by adding an alkylene oxide having 2 to 4 carbon atoms to the hydroxyl group of the amide (A11).
Examples of the alkylene oxide having 2 to 4 carbon atoms in the alkylene oxide adduct (A12) include ethylene oxide, 1,2- or 1,3-propylene oxide and 1,2-, 1,3-, 1,4-. Alternatively, 2,3-butylene oxide and the like can be mentioned.
Of the alkylene oxides having 2 to 4 carbon atoms, ethylene oxide is preferable from the viewpoint of loose stool permeability.

The number of moles of the alkylene oxide having 2 to 4 carbon atoms added in the alkylene oxide adduct (A12) is preferably 2 to 20 moles.

The alkylene oxide adduct (A12) can be produced by adding the alkylene oxide having 2 to 4 carbon atoms to the amide (A11) by a known method.
The above-mentioned alkylene oxide adduct (A12) may be used alone or in combination of two or more.

Examples of the aliphatic amine having 6 to 24 carbon atoms in the compound (A13) include hexylamine, octylamine, and hydrogenated beef tallow amine.
Of the aliphatic amines having 6 to 24 carbon atoms, hydrogenated beef tallow amine is preferable from the viewpoint of loose stool permeability.

As the alkylene oxide having 2 to 4 carbon atoms in the compound (A13), the alkylene oxide having 2 to 4 carbon atoms exemplified in the description of the alkylene oxide adduct (A12) can be used.
Of the alkylene oxides having 2 to 4 carbon atoms, ethylene oxide is preferable from the viewpoint of loose stool permeability.

The addition mole number of the alkylene oxide having 2 to 4 carbon atoms in the compound (A13) is preferably 2 to 20 moles.

The compound (A13) can be produced by adding the alkylene oxide having 2 to 4 carbon atoms to the aliphatic amine having 6 to 24 carbon atoms by a known method.
The compound (A13) may be used alone or in combination of two or more.

Nonionic surfactants (A1) having an amide group and / or an amino group include ethanolamides of fatty acids derived from natural fats and oils (fatty acids derived from vegetable fats and oils and fatty acids derived from animal fats and oils), AO adducts thereof, and carbon. An aliphatic amine of number 6 to 24 and an AO adduct thereof are preferable, and an AO adduct of a coconut oil fatty acid diethanolamide, a coconut oil fatty acid monoethanolamide, and an AO adduct of a hydrogenated beef fatty acid amine are more preferable.

In the betaine-type amphoteric tenside (A2) having an alkyl group having 6 to 24 carbon atoms and / or an alkenyl group having 6 to 24 carbon atoms, the alkyl group having 6 to 24 carbon atoms includes a hexyl group and an octyl group. , Decyl group, lauryl group, myristyl group, cetyl group, stearyl group, icosyl group, docosyl group, tetracosyl group and the like.
Examples of the alkenyl group having 6 to 24 carbon atoms include a hexenyl group, an octenyl group, a decenyl group, a dodecenyl group, a pentadecenyl group, an octadecenyl group and an icosenyl group.

Examples of the betaine-type amphoteric tenside (A2) having an alkyl group having 6 to 24 carbon atoms and / or an alkenyl group having 6 to 24 carbon atoms include betaine (A21) represented by the following general formula (1) and the following general. Examples thereof include betaine (A22) represented by the formula (2) and betaine (A23) represented by the following general formula (3).

In the general formula (1), R ¹ and R ² are independently alkyl groups having 1 to 4 carbon atoms (methyl group, ethyl group, propyl group, butyl group, etc.).
In the general formula (1), R ³ is an alkyl group having 6 to 24 carbon atoms or an alkenyl group having 6 to 24 carbon atoms, and specific examples thereof include those similar to those described above.
In general formula (1), R ⁴ is an alkylene group (methylene group having 1 to 10 carbon atoms, an ethylene group, a propylene group, butylene group, pentylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group ).

Betaine (A21) represented by the general formula (1) can be obtained from the market as Levon 2000HG [manufactured by Sanyo Chemical Industries, Ltd.] or the like.

In the general formula (2), R ⁵ and R ⁶ are independently alkyl groups having 1 to 4 carbon atoms (methyl group, ethyl group, propyl group, butyl group, etc.).
In the general formula (2), R ⁷ is an alkyl group having 6 to 24 carbon atoms or an alkenyl group having 6 to 24 carbon atoms, and specific examples thereof include those similar to those described above.

Betaine (A22) represented by the general formula (2) can be obtained from the market as Levon LD36 [manufactured by Sanyo Chemical Industries, Ltd.] or the like.

In the general formula (3), R ⁸ is an alkyl group having 6 to 24 carbon atoms or an alkenyl group having 6 to 24 carbon atoms, and specific examples thereof include those similar to those described above.

In the general formula (3), Za ⁺ is an a (preferably 1-2) -valent counterion, and examples thereof include alkali metal cations (sodium cations and the like) and alkyl earth metal cations (calcium cations and the like).

Betaine (A23) represented by the general formula (3) can be obtained from the market as Levon CIB [manufactured by Sanyo Chemical Industries, Ltd.].

The chemical formula amount or number average molecular weight of the surfactant (A) in the present invention is preferably 200 to 1000, more preferably 250 to 500, from the viewpoint of loose stool permeability.
In the present invention, the number average molecular weight can be measured by gel permeation chromatography (GPC) or the like under the following conditions.
Equipment: HLC-8220GPC [manufactured by Tosoh Corporation]
GPC column guard column: TSKground class SuperH-L (4.6 mm ID x 15 cm)
Separation column: TSKgel SuperH2000 (6 mm ID × 15 cm) + TSKgel SuperH3000 (6 mm ID × 15 cm) + TSKgel SuperH4000 (6 mm ID × 15 cm)
Detector: RI detector Flow medium: Tetrahydrofuran Flow rate: 0.6 ml / min
Column temperature: 40 ° C
Sample concentration: 0.25 wt% Sample injection volume: 10 μl

The HLB value of the nonionic surfactant (A1) having an amide group and / or an amino group in the present invention is preferably 7 to 17, more preferably 9 to 15, from the viewpoint of loose stool permeability. ..
The HLB value of the surfactant (A) is an index showing the balance between hydrophilicity and lipophilicity. For example, in "Introduction to Surfactants" [published by Sanyo Chemical Industries, Ltd. in 2007, by Takehiko Fujimoto], page 212. According to the described Oda method, it can be calculated from the ratio of the organic value and the inorganic value of the organic compound.
HLB = 10 × Inorganic / Organic The organic value and the inorganic value for deriving the HLB can be calculated using the values in the table described on page 213 of the above-mentioned "Introduction to Surfactants".

The weight ratio of the surfactant (A) contained in the loose stool permeability imparting agent of the present invention is preferably 5% by weight based on the weight of the non-volatile component in the loose stool permeability imparting agent from the viewpoint of loose stool permeability. That is all.
When the anionic surfactant (B) described later is not used in combination, the weight ratio of the surfactant (A) contained in the loose stool permeability-imparting agent is the weight ratio of the loose stool permeability-imparting agent in the loose stool permeability-imparting agent. Based on the weight of the non-volatile component, it is preferably 5 to 100% by weight, more preferably 10 to 90% by weight, and particularly preferably 15 to 80% by weight.
The non-volatile component in the present invention is a residue after 1 g of a sample is heated and dried in a glass petri dish for 45 minutes at 130 ° C. without a lid.

The loose stool permeability imparting agent of the present invention may further contain an anionic surfactant (B).

Specific examples of the anionic surfactant (B) include dialkyl sulfosuccinate salts, alkyl sulfonates, alkyl phosphate ester salts and the like.
As the anionic surfactant (B), a dialkylsulfosuccinate salt and an alkylphosphate ester salt are particularly preferable from the viewpoint of loose stool permeability.

The dialkylsulfosuccinate salt preferably has an alkyl group having 6 to 18 carbon atoms, more preferably an alkyl group having 8 to 16 carbon atoms, and an alkyl having 8 to 14 carbon atoms from the viewpoint of loose stool permeability. It is particularly preferred to have a group.
Further, the dialkylsulfosuccinate salt is preferably an alkali metal salt.
The alkyl group may be linear or branched, and the two alkyl groups may be the same or different.

From the viewpoint of loose stool permeability, the alkyl sulfonate preferably has an alkyl group having 6 to 20 carbon atoms, more preferably an alkyl group having 8 to 18 carbon atoms, and an alkyl group having 10 to 16 carbon atoms. Is particularly preferable. The alkyl group may be linear or branched, and may have a distribution of carbon atoms.

Specific examples of alkyl phosphate ester salts include octyl alcohol phosphate (mono or g) ester potassium salt, 2-ethylhexyl alcohol phosphate (mono or g) ester potassium salt, and decyl alcohol phosphate (mono or g) phosphate. ) Sodium ester, potassium phosphate (mono or g) ester of isodecyl alcohol, potassium phosphate (mono or g) ester of dodecyl alcohol, sodium phosphate (mono or g) ester of tridecyl alcohol, iso Tridecyl alcohol phosphate (mono or g) ester sodium salt, tetradecyl alcohol phosphate (mono or g) ester potassium salt, hexadecyl alcohol phosphate (mono or g) ester sodium salt, octadecyl alcohol (stearyl alcohol) ) Phosphate (mono or g) ester potassium salt, oleyl alcohol phosphate (mono or g) ester potassium salt, vegetable oil derived alcohol (eg palm oil alcohol, etc.) phosphate (mono or g) ester potassium salt, Ethylene oxide (hereinafter abbreviated as EO) 2 mol of octyl alcohol, phosphate (mono or g) ester potassium salt, 3 mol of decyl alcohol, sodium phosphate (mono or g) ester, lauryl alcohol EO 3 mol additive of potassium phosphate (mono or g) ester potassium salt, tridecyl alcohol EO 5 mol additive phosphate (mono or g) ester potassium salt, isotridecyl alcohol EO 3 mol additive phosphoric acid ( Mono or g) ester potassium salt and the like can be mentioned.
Of these, from the viewpoint of loose stool permeability, oleyl alcohol phosphate monoester potassium salt, stearyl alcohol phosphate monoester sodium salt, octyl alcohol phosphate monoester potassium salt, coconut oil alcohol phosphate potassium salt and lauryl A phosphoric acid monoester potassium salt of an alcohol EO 3 mol adduct is preferred.
The anionic surfactant (B) may be used alone or in combination of two or more.

When the loose stool permeability imparting agent of the present invention contains the anionic surfactant (B), the weight ratio of the anionic surfactant (B) is based on the weight of the non-volatile component in the loose stool permeability imparting agent. It is preferably 5 to 95% by weight, more preferably 15 to 80% by weight, and particularly preferably 25 to 70% by weight.

The loose stool permeability imparting agent of the present invention may contain a nonionic surfactant (C) other than the nonionic surfactant (A1) described above.
Examples of the nonionic surfactant (C) to be added to the loose stool permeability imparting agent of the present invention include a surfactant (C1) represented by the following general formula (4) from the viewpoint of loose stool permeability.

R ⁹ -[(A ¹ O) _m- (CH ₂ CH ₂ O) _n- H] _p (4)

^{R 9} in the above general formula (4) represents a residue obtained by removing all active hydrogen from a multivalent active hydrogen compound. In the general formula (4), p represents a valence and is an integer of 3 to 6. Examples of the polyvalent active hydrogen compound include polyhydric alcohols having a valence of 3 to 6, saccharides, polyvalent carboxylic acids, polyvalent amines and the like.

Among the polyhydric alcohols having a valence of 3 to 6, as trivalent polyhydric alcohols, glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,2,3-pentanthriol, 1,2,4-pentantriol, 2-methyl-1,2,3-propanetriol, 2-methyl-2,3,4-butanetriol, 2-ethyl-1,2,3-butanetriol, 2, 3,4-Pentantriol, 3-methylpentane-1,3,5-triol, 2,4-dimethyl-2,3,4-pentantriol, 2,3,4-hexanetriol, 4-propyl-3, Examples thereof include 4,5-heptane triol, 1,3,5-cyclohexanetriol, pentamethylglycerin, trimethylolethane, trimethylolpropane, castor oil and cured castor oil.
Examples of the tetravalent polyhydric alcohol include 1,2,3,4-butanetetraol, pentaerythritol, diglycerin, sorbitan, ribose, arabinose, xylose and lyxose.
Examples of the pentahydric polyhydric alcohol include triglycerin, arabitol, xylitol, glucose, fructose, galactose, mannose, allose, gulose, idose, talose and quercitol.
Examples of the hexavalent polyhydric alcohol include dipentaerythritol, sorbitol, galactitol, mannitol, aritol, iditol, taritol and inositol.

Examples of the polyhydric alcohol having a valence of 3 to 6 include animal and vegetable fats and oils other than castor oil and hardened castor oil.

Among these polyhydric alcohols, glycerin, trimethylolpropane, castor oil, hardened castor oil, pentaerythritol, sorbitan and sorbitol are preferable, and trimethylolpropane and pentaerythritol are more preferable from the viewpoint of loose stool permeability.

Examples of saccharides include monosaccharides and the like.

Among the polyvalent carboxylic acids having valences of 3 to 6, the trivalent carboxylic acids include 1,2,3-propanetricarboxylic acid, 1,2,4-butanetricarboxylic acid, and 1,3,5-cyclohexanetricarboxylic acid. , Trimeric acid (C18 unsaturated carboxylic acid trimer), trimellitic acid and the like.
Examples of the tetravalent carboxylic acid include ethylenetetracarboxylic acid, cyclopentanetetracarboxylic acid, naphthalene-1,4,5,8-tetracarboxylic acid and butane-1,2,3,4-tetracarboxylic acid.
Examples of the pentavalent carboxylic acid include 1,2,3,4,5-cyclohexanepentacarboxylic acid, benzenepentacarboxylic acid and 1,2,4,5,8-naphthalene pentacarboxylic acid.
Examples of the hexavalent carboxylic acid include cyclohexanehexacarboxylic acid, benzenehexacarboxylic acid, 1,2,3,4,5,7-naphthalenehexacarboxylic acid and the like.

Among the polyvalent amines having a valence of 3 to 6, examples of the trivalent amine include 1,2,3-propanetriamine, hexamethylenetriamine, 1,3,5-benzenetriamine and melamine.
Examples of the tetravalent amine include butane-1,1,4,4-tetraamine, triethylenetetramine and pyrimidine-2,4,5,6-tetraamine.

The polyvalent active hydrogen compound may contain at least two types of active hydrogen groups selected from the group consisting of a carboxyl group, a hydroxyl group and an amino group. Examples of the compound containing two or more active hydrogen groups include citric acid, glyceric acid and amino acids (aspartic acid, glutamic acid, lysine, arginine, serine, threonine, tyrosine, aspartic acid, glutamic acid and the like).

The polyvalent active hydrogen compound may be a compound in which a polyhydric alcohol having a valence of 3 to 6 and a fatty acid form a partial ester.
Examples of the polyhydric alcohol having a valence of 3 to 6 include the above-mentioned compounds and the like.
Fatty acids include aliphatic carboxylic acids having 8 to 24 carbon atoms [aliphatic saturated carboxylic acids (caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, tridecanoic acid, isotridecanoic acid, myristic acid, palmitic acid). , Stearic acid, isostearic acid, etc.), aliphatic unsaturated carboxylic acid (oleic acid, linoleic acid, linolenic acid, ricinoleic acid, castor oil fatty acid, cured castor oil fatty acid, etc.)] and the like.

^{When R 9} in the general formula (4) is a residue obtained by removing all active hydrogen from the alkylene oxide adduct of the ester of a polyhydric alcohol having a valence of 3 to 6 and a fatty acid, the general formula (4) is used. The degree of esterification of the alkylene oxide adduct (C1) of the represented polyvalent active hydrogen compound is preferably 50% or less.
The degree of esterification in the present invention is calculated from the following formula (1) based on the peak area (integrated area) of the mono, di and triester bodies obtained by the automatic integration method from the measurement results of gel permeation chromatography (GPC). calculate.

The conditions of GPC are as follows.
Equipment: HLC-8220GPC [manufactured by Tosoh Corporation]
GPC column guard column: TSKground class SuperH-L (4.6 mm ID x 15 cm)
Separation column: TSKgel SuperH2000 (6 mm ID × 15 cm) + TSKgel SuperH3000 (6 mm ID × 15 cm) + TSKgel SuperH4000 (6 mm ID × 15 cm)
Detector: RI detector Flow medium: Tetrahydrofuran Flow rate: 0.6 ml / min
Column temperature: 40 ° C
Sample concentration: 0.25% by weight
Sample injection volume: 10 μl

Among the above-mentioned polyvalent active hydrogen compounds, trimethylolpropane, pentaerythritol, 1,2,3-propanetricarboxylic acid and glutamic acid are preferable from the viewpoint of loose stool permeability.

^{A 1} O in the general formula (4) represents an alkyleneoxy group having 3 to 4 carbon atoms, and specifically, a propyleneoxy group (hereinafter abbreviated as PO) or a butyleneoxy group (hereinafter abbreviated as BO). be. The PO may be a linear propyleneoxy group or a branched propyleneoxy group (1-methylethyleneoxy group, 2-methylethyleneoxy group). BO includes linear butyleneoxy group and branched butyleneoxy group (1-methylpropyleneoxy group, 2-methylpropyleneoxy group, 3-methylpropyleneoxy group, 1,2-dimethylethyleneoxy group, 1,1'- dimethylethylene group, and 2,2-dimethylethylene .A ¹ O that group, and the like are preferably PO. Incidentally, ^{a 1} O is a one or more combination May be good.

In the general formula (4), m represents the number of moles of A ¹ O added per group [(A ¹ O) _m − (CH ₂ CH ₂ O) _{n −} ^{H] bonded to R 9.} From the viewpoint of handleability, m is preferably a number of 4 to 50, more preferably 8 to 40, and even more preferably 12 to 30. m is not always an integer and may be a decimal.

If they contain two or more alkyleneoxy groups in A 1 ^O, PO and BO in A 1 ^O may be added in a block form or random form. “Block” means that two or more alkyleneoxy groups of one type are continuous in a group [(A ¹ O) _m − (CH ₂ CH ₂ O) _{n −} ^{H] bonded to R 9.} Aspect.

_{CH 2} CH ₂ O in the general formula (4) represents an ethyleneoxy group (EO).
N in the general formula (4) is the number of moles of CH ₂ CH ₂ O added per group [(A ¹ O) _m − (CH ₂ CH ₂ O) _{n −} ^{H] bound to R 9.} From the viewpoint of loose stool permeability, the number is preferably 0 to 15, more preferably 2 to 12, and particularly preferably 4 to 9. n is not always an integer and may be a decimal.

^{It is preferable that A 1} O and CH ₂ CH ₂ O in the general formula (4) are added in a block shape.

Further, in the surfactant (C1) represented by the general formula (4), ^{either A 1} O or CH ₂ CH ₂ O may be located at the terminal, but the hydrophilicity of the loose stool permeability imparting agent and From the viewpoint of durability, _{it is preferable that CH 2} CH ₂ O is located at the end.

In the general formula (4), ^{the ratio of the number of added moles of A 1} O and CH ₂ CH ₂ O is preferably n / m = 0 to 0.5, more preferably n / m = 0 to 0.5, from the viewpoint of loose stool permeability. It is 0.02 to 0.3, and particularly preferably 0.04 to 0.2.
The ratio of the number of added moles between A ¹ O and CH ₂ CH _{2 O is calculated from theoretical calculation.}

^{The number of moles of A 1} O and CH ₂ CH ₂ O of the surfactant (C1) represented by the general formula (4) can be determined by analyzing (C1) with GPC.
The conditions of GPC in this case are as follows.
Equipment: HLC-8220GPC [manufactured by Tosoh Corporation]
GPC column guard column: TSKground class SuperH-L (4.6 mm ID x 15 cm)
Separation column: TSKgel SuperH2000 (6 mm ID × 15 cm) + TSKgel SuperH3000 (6 mm ID × 15 cm) + TSKgel SuperH4000 (6 mm ID × 15 cm)
Detector: RI detector Flow medium: Tetrahydrofuran Flow rate: 0.6 ml / min
Column temperature: 40 ° C
Sample concentration: 0.25% by weight
Sample injection volume: 10 μl

^{The number of moles of A 1} O and CH ₂ CH ₂ O of the surfactant (C1) represented by the general formula (4) is the molar ratio of the raw material of (C1) and the activity of the polyvalent active hydrogen compound. It can be calculated from the number of hydrogens and the like. For example, trimethylolpropane (the number of active hydrogens is 3), propylene oxide (PO) and ethylene oxide (EO) were used as raw materials in a molar ratio (trimethylolpropane: PO: EO = 1: 67: 11). In this case, a compound in which three groups represented by _{[(PO) m-} (EO) _n- H] are bonded to a residue obtained by removing all active hydrogen from trimethylolpropane (trivalent active hydrogen compound) is formed. Obtained (p = 3), the total number of added moles of PO in one molecule of the compound is 67, and the total number of added moles of EO is 11.
The number of moles of PO added per group represented by [(PO) _m − (EO) _n −H] of this compound can be calculated by (total number of moles of PO added / p), and EO addition can be performed. The number of moles n can be calculated by (total number of moles added with EO / p).

In the loose stool permeability-imparting agent of the present invention, the surfactant (C1) represented by the general formula (4) includes a PO120 mol adduct of pentaerythritol and a PO120 mol EO 10 mol of pentaerythritol from the viewpoint of loose stool permeability. Preferable are block adducts, PO70 mol EO 20 mol block adducts of trimethylol propane, and PO67 mol EO 11 mol block adducts of trimethylol propane.

In the loose stool permeability imparting agent of the present invention, the solubility parameter (SP value) of the surfactant (C1) represented by the general formula (4) is preferably 8.5-9 from the viewpoint of loose stool permeability. It is 5 (cal / cm ³ ) ^1/2 , more preferably 8.5-9.1 (cal / cm ³ ) ^1/2 , and particularly preferably 8.5-8.8 (cal / cm ^3). ) ^1/2 .
The SP value is calculated by the method described in the following document proposed by Fedors et al.
"POLYMER ENGINEERING AND SCIENCE, FEBRUARY, 1974, Vol. 14, No. 2, ROBERT F. FEDORS. (Pages 147 to 154)"

The HLB value of the surfactant (C1) represented by the general formula (4) is preferably 3.5 to 6.5, more preferably 4.0 to 6.0, from the viewpoint of loose stool permeability. Yes, especially preferably 4.5 to 6.0. The HLB value of the surfactant (C1) can be calculated by the Oda method in the same manner as the HLB value of the nonionic surfactant (A1).

The weight ratio of the surfactant (C1) represented by the general formula (4) is preferably 10 to 90% by weight based on the weight of the non-volatile component of the loose stool permeability imparting agent from the viewpoint of loose stool permeability. Yes, more preferably 20 to 80% by weight, and particularly preferably 30 to 70% by weight.

The surfactant (C1) represented by the general formula (4) can be produced by a known method or the like, and for example, alkylene oxide is added to the above polyhydric alcohol using potassium carbonate, sodium carbonate or the like as a basic catalyst. Can be manufactured by.

Examples of the nonionic surfactant (C) other than the above-mentioned surfactant (C1) include polyoxyalkylene alkyl ether (C2), polyhydric alcohol, polyoxyalkylene adduct, and fatty acid from the viewpoint of improving loose stool permeability. (C3), polyoxyalkylene glycol diester (C4), monoester of polyhydric alcohol and fatty acid (C5) and the like.
The nonionic surfactant (C) may be used alone or in combination of two or more.

Among the nonionic surfactants (C) added to the loose stool permeability imparting agent of the present invention, the polyoxyalkylene alkyl ether (C2) is a monohydric alcohol to which an alkylene oxide is added. From the viewpoint of loose stool permeability, the alkyl group of the monohydric alcohol preferably has 1 to 18 carbon atoms, more preferably 6 to 16 carbon atoms, and particularly preferably 8 to 12 carbon atoms.
The number of carbon atoms of the alkyl group may be distributed, and alkylene oxide adducts of two or more kinds of monohydric alcohols may be mixed. Examples of the alkylene oxide include EO, PO, and those obtained by block polymerization or random polymerization of these. Of these, EO is preferred. The number of moles of alkylene oxide added is preferably 1 to 20, more preferably 2 to 15, and particularly preferably 3 to 10.

Among the nonionic surfactants (C) added to the loose stool permeability imparting agent of the present invention, the ester (C3) of the polyhydric alcohol, the polyoxyalkylene adduct and the fatty acid is represented by the general formula (4). It does not correspond to the above-mentioned surfactant (C1), for example, an alkylene oxide adduct (C3-1) of an ester of a polyhydric alcohol and a fatty acid, and an ester of an alkylene oxide adduct of a polyhydric alcohol and a fatty acid (C3-1). C3-2) can be mentioned.

As a specific example of the polyhydric alcohol constituting the alkylene oxide adduct (C3-1) of the ester of the polyhydric alcohol and the fatty acid, an aliphatic polyhydric (3 to 6 valent) alcohol having 3 to 6 carbon atoms (glycerin, tri) Methylolpropane, pentaerythritol, sorbitol, sorbitan, etc.).
As a specific example of the fatty acid constituting (C3-1), an aliphatic carboxylic acid having 8 to 24 carbon atoms [aliphatic saturated carboxylic acid (caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, tridecane) Acids, isotridecanoic acid, myristic acid, palmitic acid, stearic acid, isostearic acid, etc.), aliphatic unsaturated carboxylic acids (oleic acid, linoleic acid, linolenic acid, ricinoleic acid, beef fatty acid, hardened beef fatty acid, castor oil fatty acid and hardened castor oil Fatty acids, etc.)].
Specific examples of the alkylene oxide constituting (C3-1) include AOs (EO, PO and BO) having 2 to 12 carbon atoms. AO may be one kind or a combination of two or more kinds. When two or more types of AO are used in combination, block addition or random addition may be used.
Specific examples of (C3-1) include EO15 mol addition of glycerin beef fatty acid ester, EO20 mol addition of trimethylolpropantrioleic acid ester, EO30 mol addition of tetraoleic acid ester of pentaerythritol, and sorbitan monooleic acid. 20 mol additive of EO of ester, 20 mol additive of EO of sorbitan tetraoleic acid ester, 10 mol additive of EO of hardened castor oil, 25 mol additive of EO of cured castor oil, 43 mol additive of EO of castor oil, 43 mol additive of EO of cured castor oil and glycerin Includes an EO25 molar adduct of an ester with glycerol fatty acid.
Of these, an EO 20 mol adduct of sorbitan monooleic acid ester is preferable from the viewpoint of improving loose stool permeability.

As a specific example of the polyhydric alcohol constituting the ester (C3-2) of the alkylene oxide adduct of the polyhydric alcohol and the fatty acid, an aliphatic polyhydric (3 to 6 valent) alcohol having 3 to 6 carbon atoms (glycerin, tri) Methylolpropane, pentaerythritol, sorbitol, sorbitan, etc.).
Specific examples of the alkylene oxide constituting (C3-2) include AO (EO, PO, BO) having 2 to 12 carbon atoms. AO may be one kind or a combination of two or more kinds. When two or more types of AO are used in combination, block addition or random addition may be used.
As a specific example of the fatty acid constituting (C3-2), an aliphatic carboxylic acid having 8 to 24 carbon atoms [aliphatic saturated carboxylic acid (caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, tridecane) Acids, isotridecanoic acid, myristic acid, palmitic acid, stearic acid, isostearic acid, etc.), aliphatic unsaturated carboxylic acids (oleic acid, linoleic acid, linolenic acid, ricinoleic acid, beef fatty acid, hardened beef fatty acid, castor oil fatty acid and hardened castor oil Fatty acids, etc.).
Specific examples of (C3-2) include stearic acid ester of 43 mol castor oil EO, oleic acid ester of 20 mol castor oil EO (cured castor oil EO 20 mol adduct triolate), and beef fatty acid ester of 25 mol castor oil EO. , EO25 mol adduct of hardened castor oil and polyester with oleic acid and stearic acid (number average molecular weight; 6000) and polyester with EO25 mol adduct of hardened castor oil and sebacic acid and stearic acid (number average molecular weight; 7000). Be done.
Of these, the cured castor oil EO 20 mol adduct triolate is preferable from the viewpoint of improving the permeability of loose stool.

Examples of the polyoxyalkylene glycol diester (C4) include a diester (C4-1) of a polyoxyalkylene glycol and a fatty acid.
Specific examples of the alkylene oxide constituting (C4-1) include AOs (EO, PO and BO) having 2 to 12 carbon atoms. AO may be one kind or a combination of two or more kinds. When two or more types of AO are used in combination, block addition or random addition may be used.
As a specific example of the fatty acid constituting (C4-1), an aliphatic carboxylic acid having 8 to 24 carbon atoms [aliphatic saturated carboxylic acid (caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, tridecane) Acids, isotridecanoic acid, myristic acid, palmitic acid, stearic acid, isostearic acid, etc.), aliphatic unsaturated carboxylic acids (oleic acid, linoleic acid, linolenic acid, etc.), animal and vegetable oils (palm oil, palm oil, castor oil, hardened castor oil, etc.) , Beef fat, hardened beef fat, pork fat, etc.)] Fatty acids can be mentioned.
As (C4-1), polyoxyethylene glycol (number average molecular weight; 400) diorate is preferable from the viewpoint of improving loose stool permeability.

Among the nonionic surfactants (C) added to the loose stool permeability imparting agent of the present invention, as a specific example of the polyhydric alcohol constituting (C5) in the monoester (C5) of the polyhydric alcohol and the fatty acid, Examples thereof include aliphatic polyhydric (3 to 6 valent) alcohols having 3 to 6 carbon atoms (glycerin, trimethylolpropane, pentaerythritol, sorbitol, sorbitan, etc.).
As a specific example of the fatty acid constituting (C5), an aliphatic carboxylic acid having 8 to 24 carbon atoms [aliphatic saturated carboxylic acid (caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, tridecanoic acid, Isotridecanoic acid, myristic acid, palmitic acid, stearic acid, isostearic acid, etc.), aliphatic unsaturated carboxylic acid (oleic acid, linoleic acid, linolenic acid, ricinolic acid, beef fatty acid, hardened beef fatty acid, castor oil fatty acid, hardened castor oil fatty acid, etc. )].
A specific example of (C5) is sorbitan monolaurate.

When the loose stool permeability imparting agent of the present invention contains the nonionic surfactant (C), the weight ratio of the nonionic surfactant (C) is determined in the loose stool permeability imparting agent from the viewpoint of improving the loose stool permeability. Based on the weight of the non-volatile component, it is preferably 10 to 80% by weight, more preferably 20 to 70% by weight, and particularly preferably 30 to 60% by weight.

The loose stool permeability imparting agent of the present invention may contain a polyhydric alcohol (D) having 2 to 10 carbon atoms.
Examples of the polyhydric alcohol (D) having 2 to 10 carbon atoms include ethylene glycol, propylene glycol, glycerin and sorbitol.
The loose stool permeability imparting agent of the present invention tends to improve the loose stool permeability by using a polyhydric alcohol (D) having 2 to 10 carbon atoms in combination. Therefore, when the polyhydric alcohol (D) having 2 to 10 carbon atoms is used in combination, excellent loose stool permeability tends to be exhibited even when the amount of the loose stool permeability imparting agent used is small.

When the loose stool permeability imparting agent of the present invention contains the polyhydric alcohol (D), the weight ratio of the polyhydric alcohol (D) is non-volatile in the loose stool permeability imparting agent from the viewpoint of improving the loose stool permeability. Based on the weight of the ingredients, it is preferably 5-50% by weight.
When the loose stool permeability imparting agent of the present invention contains the nonionic surfactant (C) and the polyhydric alcohol (D), the nonionic surfactant (C) and the polyhydric alcohol (D) are contained. ) Is preferably 10 to 80% by weight, more preferably 20 to 70% by weight, and particularly preferably 30 to 30% by weight, based on the weight of the non-volatile component in the loose stool permeability imparting agent. It is 60% by weight.

The loose stool permeability imparting agent of the present invention may contain an additive (E) other than the above (A) to (D), if necessary.
Examples of the additive (E) include lubricants such as solvent (water and organic solvents, preferably water) wax, antioxidants, ultraviolet absorbers, defoamers, preservatives and fragrances.
The content of (E) in the loose stool permeability-imparting agent of the present invention is preferably 5% by weight or less, more preferably 0.1 to 1%, based on the weight of the non-volatile component in the loose stool permeability-imparting agent. 1% by weight.

In the loose stool permeability imparting agent of the present invention, the weight ratio [(A) / (B)] of the surfactant (A) and the anionic surfactant (B) is preferably from the viewpoint of improving the loose stool permeability. It is 0.05 to 19, more preferably 0.1 to 9, and particularly preferably 0.2 to 6.

When the above-mentioned anionic surfactant (B) and nonionic surfactant (C) are used in combination in the loose stool permeability-imparting agent of the present invention, the surfactant (A) and the anionic surfactant (B) are used in combination. The weight ratio [(A) / (B) / (C)] of the nonionic surfactant (C) is 100, which is the total weight of (A), (B) and (C) from the viewpoint of improving loose stool permeability. , It is preferably [(5 to 95) / (3 to 90) / (2 to 80)], and more preferably [(5 to 80) / (15 to 80) / (5 to 70)]. It is particularly preferable that it is [(5 to 75) / (20 to 70) / (5 to 65)].

The loose stool permeability-imparting agent of the present invention includes the above-mentioned surfactant (A), and if necessary, water, anionic surfactant (B), nonionic surfactant (C), polyhydric alcohol (D) and It can be obtained by blending each component such as the additive (E) and heating at room temperature or if necessary (for example, 30 to 70 ° C.) to uniformly mix. The blending order and blending method of each component are not particularly limited.

The loose stool permeability imparting agent of the present invention is preferably used for fibers.
The fiber to which the loose stool permeability imparting agent of the present invention is attached is preferably used for a non-woven fabric product, and particularly preferably used for a top sheet of an absorbent article such as a disposable diaper.

The loose stool permeability imparting agent of the present invention is generally applied to hydrophobic fibers as an aqueous emulsion.
The aqueous emulsion is preferably prepared by adding water at 20 to 40 ° C. to a loose stool permeability imparting agent to dilute it, or adding a loose stool permeability imparting agent to water at 20 to 40 ° C. and emulsifying it.

The concentration of the aqueous emulsion can be selected as desired, but the weight ratio of the non-volatile component in the loose stool permeability imparting agent is preferably 0.05 to 20% by weight based on the weight of the aqueous emulsion. Yes, more preferably 0.1 to 10% by weight.

By adhering the loose stool permeability imparting agent of the present invention to the hydrophobic fiber, the hydrophobic fiber can be imparted with loose stool permeability to obtain the fiber of the present invention.
The method of attaching the loose stool permeability imparting agent to the hydrophobic fiber is not particularly limited, and is generally used in any step such as spinning and drawing, such as a dip lubrication method, an oiling roll method, a dipping method, and a spraying method. The method can be used.
The amount of the loose stool permeability imparting agent attached is preferably an amount such that the weight ratio of the non-volatile component in the loose stool permeability imparting agent is 0.02 to 2% by weight based on the weight of the hydrophobic fiber. An amount of .05 to 2% by weight is more preferable, and an amount of 0.1 to 2% by weight is particularly preferable.

The hydrophobic fiber used as the material of the fiber of the present invention means a fiber having a temperature of 25 ° C., a relative humidity of 65% and a water absorption rate of 1% by weight or less.
The hydrophobic fiber is not particularly limited, and a generally used hydrophobic synthetic fiber can be used, and a fiber made of polyolefin, polyester, polyamide or the like can be used.
Examples of the polyolefin include polyethylene, polypropylene, ethylene vinyl acetate copolymer, ethylene / propylene copolymer, ethylene / propylene / 1-butene copolymer and the like.
Examples of the polyester include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene terephthalate / isophthalate, and polyether polyester.
Examples of the polyamide include 6,6-nylon, 6-nylon and the like.
Among these, polyolefins and polyesters are preferably used as water-absorbing materials for diapers.

The fiber form using the fiber to which the loose stool permeability imparting agent of the present invention is attached is preferably a cloth-like shape, and examples thereof include woven fabrics, knitted fabrics, and non-woven fabrics. Further, fibers mixed by a method such as mixed cotton, mixed spinning, mixed fiber, mixed knitting, and mixed weaving may be used as a cloth. Among these, non-woven fabric is particularly preferable.

When the fiber to which the loose stool permeability imparting agent of the present invention is attached is applied to a non-woven fabric, the short fiber treated with the loose stool permeability imparting agent of the present invention is made into a fiber laminate by a dry method or a wet method, and then pressure-bonded with a heating roll. The non-woven fabric may be obtained by spun-bonding method, melt-blown method, flash spinning method, etc. May be attached.

The fiber of the present invention and a non-woven fabric using the same are suitably used as a top sheet of a water-absorbent article, particularly a top sheet of a sanitary material such as a disposable diaper.
It can also be used for a second sheet, a water absorber, an absorption pad, and the like.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples.

Production Example 1: Synthesis of coconut oil fatty acid diethanolamide (A-1) In a reaction vessel having a capacity of 500 ml equipped with a thermometer, a reflux condenser, a stirrer, and a distillation apparatus, 106.2 parts by weight (1.01 mol) of diethanolamine was added. 0.4 parts by weight (0.01 mol) of sodium hydroxide was charged, the inside of the container was replaced with nitrogen, and the pressure was reduced to 2.66 MPa to 3.99 MPa (20 to 30 mmHg). After that, the temperature of the reaction system was raised to 120 to 130 ° C., and this temperature was maintained for 1 hour. After confirming that the distillate of water had completely stopped, the reaction system was cooled to 60 ° C., and 214.2 parts by weight (1.00 mol) of coconut oil fatty acid methyl was added under reduced pressure to add this reaction system. Under the conditions of 2.66 MPa to 3.99 MPa (20 to 30 mmHg) and 65 to 70 ° C., the mixture was aged for 1 hour while distilling off the produced methanol. After confirming the completion of the reaction by thin layer chromatography, the reaction system was cooled to 40 ° C. to obtain 286.2 parts by weight of a solution containing 95% by weight of the coconut oil fatty acid diethanolamide (A-1).

Production Example 2: Production of Phosphate Monoester Potassium Salt (B-2) of Stearyl Alcohol 478.8 parts by weight of stearyl alcohol and 101 parts by weight of anhydrous phosphoric acid are charged in a reaction vessel equipped with a stirrer and a thermometer, and the temperature is 60 ° C. After the reaction with, 94 parts by weight of potassium hydroxide was added to obtain a phosphate potassium salt of stearyl alcohol. Water was added to the obtained stearyl alcohol phosphate monoester potassium salt to obtain a solution containing 10% by weight of stearyl alcohol phosphate monoester potassium salt (A-2).

Production Example 3: Production of coconut oil alcohol phosphoric acid monoester potassium salt (B-3) 330 parts by weight of coconut oil alcohol and 101 parts by weight of anhydrous phosphoric acid are charged in a reaction vessel equipped with a stirrer and a thermometer, and at 60 ° C. After the reaction, 94 parts by weight of potassium hydroxide was added to obtain a phosphate potassium salt of coconut oil alcohol. Water was added to the obtained coconut oil alcohol phosphate monoester potassium salt to obtain a solution containing 50% by weight of coconut oil alcohol phosphate monoester potassium salt (A-3).

Production Example 4: Production of octyl alcohol phosphoric acid monoester potassium salt (B-4) 230.5 parts by weight of octyl alcohol and 101 parts by weight of anhydrous phosphoric acid are charged in a reaction vessel equipped with a stirrer and a thermometer, and at 60 ° C. After the reaction, 94 parts by weight of potassium hydroxide was added to obtain a phosphate potassium salt of octyl alcohol. Water was added to the obtained octyl alcohol phosphate monoester potassium salt to obtain a solution containing 75% by weight of the octyl alcohol phosphate monoester potassium salt (A-4).

Examples 1 and 2 and 9 and Comparative Examples 1 and 2 and 6: Production of loose stool permeability-imparting agent A solution containing the components of the type shown in Table 1 or the components of the types shown in Table 1 (for each raw material used). Will be described later) and loose stool permeability-imparting agents (Examples 1 and 2 and 9 and Comparative Examples 1 and 2 and 6).

Examples 3 to 8, 10 to 16 and Comparative Examples 3 to 5: Production of loose stool permeability-imparting agent Regarding the components of the types shown in Table 1 or the solutions containing the components of the types shown in Table 1 (for each raw material used). Will be described later), and the mixture prepared so that the parts by weight of the component (pure content) have the values shown in Table 1 is stirred at 40 ° C. for 30 minutes to impart loose stool permeability (Examples 3 to 8 and 10). ~ 16 and Comparative Examples 3 to 5) were prepared.

The raw materials corresponding to the components used in Examples 1 to 16 and Comparative Examples 1 to 6 are as follows. In addition, the "HLB value" and "chemical formula amount or number average molecular weight" of each component are shown in Table 1.
(A-1): Solution containing 95% by weight of coconut oil fatty acid diethanolamide synthesized in Production Example 1 (A-2): Betaine represented by the general formula (1) (coconut oil fatty acid amide propyl dimethylaminoacetic acid betaine) ) Containing 31% by weight [Product name: Lebon 2000HG, manufactured by Sanyo Kasei Kogyo Co., Ltd.]
(A-3): A solution containing 36% by weight of betaine (betaine lauryldimethylaminoacetate) represented by the general formula (2) [Product name: Levon LD-36, manufactured by Sanyo Chemical Industries, Ltd.]
(A-4): A solution containing 34% by weight of betaine (2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine sodium salt) represented by the general formula (3) [Product name: Levon CIB, Sanyo Kasei Kogyo Co., Ltd.]
(A-5): Hydrogenated beef fat amine EO 15 mol addition (A-6): Palm oil fatty acid monoethanolamide EO 2.8 mol addition (B-1): Oleyl alcohol phosphate monoester potassium salt 25% by weight Solution (B-2): Solution containing 10% by weight of stearyl alcohol phosphate monoester potassium salt produced in Production Example 2 (B-3): Palm oil alcohol phosphate monoester potassium produced in Production Example 3 Solution containing 50% by weight of salt (B-4): Solution containing 75% by weight of octyl alcohol phosphate monoester potassium salt (B-5): 70 by weight of lauryl alcohol EO 3 mol adduct phosphate monoester potassium salt Solution containing% by weight [Product name: Electro stripper F, manufactured by Kao Co., Ltd.]
(B-6): Solution containing 70% by weight of di-2-ethylhexylsulfosuccinate sodium salt [Product name: Sanmorin OT-70, manufactured by Sanyo Chemical Industries, Ltd.]
(C-1): Sorbitan monolaurate [Product name: Ionet S-20, manufactured by Sanyo Chemical Industries, Ltd.]
(C-2): Sorbitan monooleate EO 20 mol adduct [Product name: Sandet OS-200A, manufactured by Sanyo Chemical Industries, Ltd.]
(C-3): Trimethylolpropane PO67EO 11 mol adduct [Product name: Nieuport TL-4500N, manufactured by Sanyo Chemical Industries, Ltd.]
(C-4): Triolate of 20 mol adduct of hardened castor oil (D-1): Glycerin

Examples 17 to 32 and Comparative Examples 7 to 12: Production of non-woven fabric The non-volatile components of the obtained loose stool permeability-imparting agents of Examples 1 to 16 or Comparative Examples 1 to 6 were 1.0 in warm water at 25 ° C. By diluting to a weight of% by weight, a diluted solution of a loose stool permeability imparting agent was obtained.
Next, 150 g of the diluted solution of the loose stool permeability imparting agent was attached to 300 g of the fiber body by the dip lubrication method, and the amount of the non-volatile component of the loose stool permeability imparting agent attached to the fiber was set to the value shown in Table 1. bottom.
The fiber body was a polyester (core) -polyethylene (sheath) -based composite fiber to which a fiber treatment agent such as a fiber treatment agent was not attached, and had a single fiber fineness of 2.2 Dtex and a fiber length of 51 mm. .. The fibers to which the diluted solutions of each loose stool permeability imparting agent are attached are placed in a warm air dryer at 80 ° C. for 1 hour and then left to dry at room temperature for 4 hours or more to obtain a loose stool permeability imparting agent. The attached fibers were obtained.
The obtained fibers were passed through a roller card to prepare a card web having ^{a basis weight of 20 g / m 2.} The obtained card web was treated with hot air at 140 ° C. for 10 seconds to obtain an air-through non-woven fabric.
With respect to the obtained non-woven fabric, the loose stool flow distance and the loose stool permeability were evaluated using the artificial loose stool shown below. The results are shown in Table 1.

<How to adjust artificial loose stool>
80 g of bentonite [Bengel manufactured by Hojun Co., Ltd.], 30 g of powdered cellulose [KC Flock W-200 manufactured by Nippon Paper Industries Co., Ltd.] and 890 g of ion-exchanged water were stirred with a disper for 10 minutes and allowed to stand at 25 ° C. for 24 hours. Artificial loose stools for evaluation were adjusted. When artificial loose stool was used in each evaluation, it was used after stirring with a disper for 3 minutes each time.

-Evaluation of loose stool flow distance The non-woven fabric to which the loose stool permeability imparting agent was attached was cut into a size of 10 cm x 10 cm.
The cut non-woven fabric is placed on a table inclined at 45 degrees, and about 0.25 ml of artificial loose stool is dropped from a burette installed at a height of 10 mm from the surface of the non-woven fabric until the flow of artificial loose stool stops from the dropping position. Distance was measured. This measurement was performed at eight points on the surface of the non-woven fabric to calculate the average liquid flow distance.
The evaluation of the loose stool flow distance was carried out in an environment of a temperature of 25 ° C. and a humidity of 40% RH.
If the average liquid flow distance is less than 45 mm, the loose stool permeability is good.

(2) Loose stool permeability A test non-woven fabric (10 cm × 10 cm) was placed on a filter paper (manufactured by ADVANTEC, No. 424 (10 cm × 10 cm)), and 3 ml of artificial loose stool was added dropwise to the filter paper in 10 seconds. One minute after the total amount was dropped, the weight of the components adhering to the filter paper was measured.
The evaluation of loose stool permeability was carried out in an environment of a temperature of 25 ° C. and a humidity of 40% RH.
The heavier the weight of the component attached to the filter paper, the better the loose stool permeability.

The non-woven fabric using the fiber to which the loose stool permeability imparting agent of the present invention is attached is excellent in loose stool permeability and is therefore useful as a top sheet for absorbent articles.

Claims (8)

It consists of a nonionic surfactant (A1) having an amide group and / or an amino group and a betaine type amphoteric surfactant (A2) having an alkyl group having 6 to 24 carbon atoms and / or an alkenyl group having 6 to 24 carbon atoms. A loose stool permeability-imparting agent containing at least one surfactant (A) selected from the group. The loose stool permeability-imparting agent according to claim 1, further containing an anionic surfactant (B). The loose stool permeability imparting according to claim 2, wherein the weight ratio [(A) / (B)] of the surfactant (A) and the anionic surfactant (B) is 0.05 to 19. Agent. The loose stool permeability-imparting agent according to any one of claims 1 to 3, wherein the surfactant (A) has a chemical formula amount or a number average molecular weight of 200 to 1000. The loose stool permeability-imparting agent according to any one of claims 1 to 4, wherein the nonionic surfactant (A1) has an HLB value of 7 to 17. The loose stool permeability-imparting agent according to any one of claims 1 to 5 is a fiber adhered to a hydrophobic fiber, and the weight ratio of the non-volatile component of the loose stool permeability-imparting agent is the hydrophobic fiber. Fibers that are 0.02 to 2% by weight based on weight. A non-woven fabric using the fiber according to claim 6. A water-absorbent article using the non-woven fabric according to claim 7.