Water permeability-imparting agent, treatment agent for use in production of nonwoven fabric, and use thereof

Abstract

Provided are: a water permeability-imparting agent having excellent foam-preventive properties; and a treatment agent for use in the production of a nonwoven fabric.　This water permeability-imparting agent contains a compound (A) and a compound (B), and also contains at least one component selected from among a compound (C), a compound (D), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the nonvolatile content in the water permeability-imparting agent is 0.5-450 mgKOH / g, and the ratio [P1 / (P1+P2+P3)] of a peak area of the nonvolatile content in the water permeability-imparting agent as measured by P nuclear NMR is 40-100%.　This treatment agent for use in the production of a nonwoven fabric contains a compound (A) and a compound (B), and also contains at least one component selected from among a compound (C), a compound (D), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the nonvolatile content in the treatment agent for use in the production of a nonwoven fabric is 0.5-450 mgKOH / g, and the ratio [P1 / (P1+P2+P3)] of a peak area of the nonvolatile content in the water permeability-imparting agent as measured by P nuclear NMR is 40-100%.

Description

Water permeability agents, treatment agents for nonwoven fabric manufacturing and their uses

[0001] The present invention relates to a water-permeability imparting agent, a treatment agent for producing nonwoven fabrics, and the use thereof.

[0002] Generally, absorbent articles such as sanitary napkins, represented by disposable diapers and synthetic napkins, often have a three-layer structure consisting of a top sheet made of a nonwoven fabric primarily made of at least one thermoplastic resin-containing fiber (e.g., polyolefin fiber, polyester fiber, etc.) that has been imparted with water permeability, a back sheet made of a water-repellent material, and a material such as cotton pulp or a polymeric absorbent disposed between the top sheet and the back sheet. Liquids such as urine and bodily fluids pass through the top sheet and are absorbed into the absorbent body, but the top sheet must have good water permeability, i.e., instantaneous water permeability, such that the time it takes for the liquid to be completely absorbed from the top sheet into the absorbent body inside is extremely short. To satisfy these required characteristics, for example, Patent Document 1 discloses the use of a synthetic fiber treatment agent.

[0003] Japanese Patent Application Publication No. 2022-045722

[0004] The treatment agent described in Patent Document 1, for example, is primarily composed of an alkyl phosphate salt and contains a nonionic surfactant or a cationic surfactant. However, problems with this treatment include foam flowout during aqueous solution preparation and roller contamination due to foam, which reduces workability. Investigation into the cause of these problems revealed that treatment agents containing these components tend to foam easily and have high foam stability. Therefore, an object of the present invention is to provide a water permeability imparting agent with excellent foam suppression properties, fibers having the imparting agent attached thereto, nonwoven fabrics having the imparting agent attached thereto, absorbent articles including the nonwoven fabrics, and a method for producing fibers using the imparting agent. Another object of the present invention is to provide a treatment agent for producing nonwoven fabrics with excellent foam suppression properties, fibers having the imparting agent attached thereto, nonwoven fabrics having the imparting agent attached thereto, absorbent articles including the nonwoven fabrics, and a method for producing fibers using the treatment agent.

[0005] As a result of intensive research into solving the above-mentioned problems, the present inventors have found that, as a first aspect, the problems can be solved by a water-permeability-imparting agent that includes a specific compound (A) and a specific compound (B), and at least one selected from a specific compound (C), a specific compound (D), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the non-volatile content of the water-permeability-imparting agent is 0.5 to 450 mg KOH / g, and the ratio of specific peak areas P1 to the sum (P1+P2+P3) of peak areas P1 to P3 in a spectrum measured by P nuclear NMR of the non-volatile content of the water-permeability-imparting agent [P1 / (P1+P2+P3)]] is 40 to 100%. In addition, the present inventors have found that, in a second aspect, the above-mentioned problem can be solved by a treatment agent for the production of nonwoven fabric, which comprises a specific compound (A) and a specific compound (B), and at least one selected from a specific compound (C), a specific compound (D), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the nonvolatile content of the treatment agent for the production of nonwoven fabric is 0.5 to 450 mg KOH / g, and the ratio of specific peak areas P1 to the sum (P1+P2+P3) of peak areas P1 to P3 in a spectrum measured by P nuclear NMR of the nonvolatile content of the treatment agent for the production of nonwoven fabric, [P1 / (P1+P2+P3)]], is 40 to 100%.

[0006] That is, the present invention includes the following aspects. <1> A water-permeability-imparting agent comprising a compound (A) represented by the following general formula (1) and a compound (B) represented by the following general formula (2), and at least one selected from a compound (C) represented by the following general formula (3), a compound (D) represented by the following general formula (4), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the non-volatile content of the water-permeability-imparting agent is 0.5 to 450 mg KOH / g, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in a spectrum measured by P nuclear NMR of the non-volatile content of the water-permeability-imparting agent [P1 / (P1+P2+P3)]] is 40 to 100%: P1: peak area in the range of 0 to 10 ppm; P2: peak area in the range of -25 to -3 ppm; and P3: peak area in the range of -3 to 0 ppm. (In the formula, R １is a branched hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. (In the formula, R ２ and R ３ are each independently a hydrocarbon group having 6 to 22 carbon atoms, and R ２ and R ３ At least one of the groups selected from the group consisting of AO and m is a branched group. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ is a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine, or a quaternary ammonium. ｍ When there are two, they may be the same or different.) (In the formula, R ４ is a hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. ２ Or - (AO) ｍ R ５ It is. ５ is a hydrocarbon group having 6 to 22 carbon atoms. Y is 1 or 2. ２ Or (AO) ｍ When there are two or more Q's, they may be the same or different. ２ If R ４ has a branch, and Q is -(AO) ｍ R ５ If R ４ and R ５ At least one selected from has a branch. (In the formula, R ６ , R ７ and R ８ are each independently a hydrocarbon group having 6 to 22 carbon atoms, and R ６ , R７ and R ８ At least one selected from the group consisting of (AO) and (AO) has a branch. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. ｍ When there are two or more of these, they may be the same or different.) <2> The water permeability imparting agent according to <1>, which has a dynamic surface tension of 25 to 60 mN / m at a lifetime of 1,000 ms when made into an aqueous dispersion with a nonvolatile content of 1%. <3> The water permeability imparting agent according to <1> or <2>, wherein the compound (A) comprises a compound in which m in the general formula (1) is an integer of 1 to 16, the compound (B) comprises a compound in which at least one of the m's is an integer of 1 to 16, the compound (C) comprises a compound in which at least one of the m's is an integer of 1 to 16, and the compound (D) comprises a compound in which at least one of the m's is an integer of 1 to 16. <4> The water permeability imparting agent according to <1> or <2>, wherein the compound (A) comprises a compound in which R in the general formula (1) １ The compound (B) includes a compound having 8 to 16 carbon atoms, and the compound (B) includes a compound represented by the general formula (2) ２ and R ３ each independently having 8 to 16 carbon atoms, and the compound (C) is a compound represented by R ４ and R ５ each independently having 8 to 16 carbon atoms, and the compound (D) is a compound represented by the general formula (4) ６ , R ７ and R ８wherein each independently has 8 to 16 carbon atoms. <5> The water permeability imparting agent according to any one of <1> to <4>, wherein the total proportion of the compound (A), the compound (B), the compound (C), the compound (D), and the inorganic phosphate (salt) (IN) in the non-volatile content of the water permeability imparting agent is 5 to 95 wt %. <6> The water permeability imparting agent according to any one of <1> to <5>, further comprising a nonionic surfactant (E). <7> Fibers to which the water permeability imparting agent according to any one of <1> to <6> has been imparted. <8> Nonwoven fabrics to which the water permeability imparting agent according to any one of <1> to <6> has been imparted. <9> A water-absorbent article comprising the nonwoven fabric according to <8>. <10> A method for producing fibers, comprising the step of imparting the water permeability imparting agent according to any one of <1> to <6> to raw fiber. <11> A treatment agent for nonwoven fabric production, comprising a compound (A) represented by the following general formula (1) and a compound (B) represented by the following general formula (2), and at least one selected from a compound (C) represented by the following general formula (3), a compound (D) represented by the following general formula (4), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the nonvolatile content of the treatment agent for nonwoven fabric production is 0.5 to 450 mg KOH / g, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in a spectrum measured by P nuclear NMR of the nonvolatile content of the treatment agent for nonwoven fabric production [P1 / (P1+P2+P3)]] is 40 to 100%: P1: peak area within the range of 0 to 10 ppm; P2: peak area within the range of -25 to -3 ppm; and P3: peak area within the range of -3 to 0 ppm. (In the formula, R １ is a branched hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. (In the formula, R ２ and R ３ are each independently a hydrocarbon group having 6 to 22 carbon atoms, and R ２ and R３ At least one of the groups selected from the group consisting of AO and m is a branched group. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ is a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine, or a quaternary ammonium. ｍ When there are two, they may be the same or different.) (In the formula, R ４ is a hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. ２ Or - (AO) ｍ R ５ It is. ５ is a hydrocarbon group having 6 to 22 carbon atoms. Y is 1 or 2. ２ Or (AO) ｍ When there are two or more Q's, they may be the same or different. ２ If R ４ has a branch, and Q is -(AO) ｍ R ５ If R ４ and R ５ At least one selected from has a branch. (In the formula, R ６ , R ７ and R ８ are each independently a hydrocarbon group having 6 to 22 carbon atoms, and R ６ , R ７ and R ８ At least one selected from the group consisting of (AO) and (AO) has a branch. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. ｍWhen there are two or more of these, they may be the same or different.) <12> The treatment agent for production of nonwoven fabric according to <11>, having a dynamic surface tension of 25 to 60 mN / m at a lifetime of 1000 ms when made into an aqueous dispersion with a nonvolatile content of 1%. <13> The treatment agent for production of nonwoven fabric according to <11> or <12>, wherein the compound (A) comprises a compound in which m in the general formula (1) is an integer of 1 to 16, the compound (B) comprises a compound in which at least one of the m's is an integer of 1 to 16, the compound (C) comprises a compound in which at least one of the m's is an integer of 1 to 16, and the compound (D) comprises a compound in which at least one of the m's is an integer of 1 to 16. <14> The treatment agent for production of nonwoven fabric according to <11> or <12>, wherein the compound (A) comprises a compound in which R in the general formula (1) １ The compound (B) includes a compound having 8 to 16 carbon atoms, and the compound (B) includes a compound represented by the general formula (2) ２ and R ３ each independently having 8 to 16 carbon atoms, and the compound (C) is a compound represented by R ４ and R ５ each independently having 8 to 16 carbon atoms, and the compound (D) is a compound represented by the general formula (4) ６ , R ７ and R ８wherein each independently have 8 to 16 carbon atoms. <15> The treatment agent for nonwoven fabric production according to any one of <11> to <14>, wherein the total proportion of the compound (A), the compound (B), the compound (C), the compound (D), and the inorganic phosphate (salt) (IN) in the nonvolatile content of the treatment agent for nonwoven fabric production is 5 to 95 wt %. <16> The treatment agent for nonwoven fabric production according to any one of <11> to <15>, further comprising a nonionic surfactant (E). <17> Fiber to which the treatment agent for nonwoven fabric production according to any one of <11> to <16> has been applied. <18> Nonwoven fabric to which the treatment agent for nonwoven fabric production according to any one of <11> to <16> has been applied. <19> A water-absorbent article comprising the nonwoven fabric according to <18>. <20> A method for producing fibers, comprising a step of applying the treating agent for nonwoven fabric production according to any one of <11> to <16> to raw fibers.

[0007] The water-permeability imparting agent of the present invention has excellent foam-suppressing properties. The treating agent for nonwoven fabric production of the present invention has excellent foam-suppressing properties.

[0008] The water-permeability imparting agent of the first embodiment and the treating agent for nonwoven fabric production of the second embodiment contain a compound (A) represented by the above general formula (1) and a compound (B) represented by the above general formula (2), and also contain at least one selected from a compound (C) represented by the above general formula (3), a compound (D) represented by the above general formula (4), and an inorganic phosphoric acid (salt) (IN). These will be explained in detail below.

[0009] [Compound (A)] Compound (A) is a compound represented by the above general formula (1). In formula (1), R １is a branched hydrocarbon group having 6 to 22 carbon atoms. In terms of instantaneous water permeability, the upper limit of the carbon number is preferably 16, more preferably 14, and even more preferably 12, and the lower limit of the carbon number is preferably 6, more preferably 7, and even more preferably 8. In terms of repeated water permeability, the upper limit of the carbon number is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the carbon number is preferably 10, more preferably 11, and even more preferably 12. In terms of instantaneous water permeability, the carbon number is preferably 6 to 16, and in terms of repeated water permeability, the carbon number is preferably 10 to 20. Examples of hydrocarbon groups include alkyl groups.

[0010] In formula (1), AO is an oxyalkylene group having 2 to 4 carbon atoms. m, the number of repeats of the oxyalkylene unit, is an integer from 0 to 20. From the viewpoint of foam-suppressing properties, the upper limit of the number of repeats m is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the number of repeats m is preferably 3, more preferably 5, and even more preferably 7. From the viewpoints of instantaneous water permeability and repeated water permeability, the upper limit of the number of repeats m is preferably 9, more preferably 8, and even more preferably 7, and the lower limit of the number of repeats m is preferably 0, more preferably 1, and even more preferably 2. From the viewpoint of foam-suppressing properties, the number of repeats m is preferably 3 to 20, and from the viewpoints of instantaneous water permeability and repeated water permeability, 0 to 9 is more preferable. From the viewpoint of foam-suppressing properties, (AO)m preferably contains at least one oxyalkylene unit selected from oxyethylene units and oxypropylene units, more preferably contains oxyethylene units, and even more preferably contains 50 mol% or more oxyethylene units.

[0011] In formula (1), M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. １ and M ２ is preferably a hydrogen atom or an alkali metal from the viewpoint of emulsion stability and antistatic properties. １ and M ２may be the same or different. Examples of alkali metals include potassium, sodium, and lithium, with potassium or sodium being preferred in terms of emulsion stability and antistatic properties. Examples of organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, as well as triethylamine. Examples of quaternary ammoniums include alkyltrimethylammonium and dialkyldimethylammonium.

[0012] Specific examples of compound (A) include, but are not limited to, mono 2-ethylhexyl phosphate, mono 2-ethylhexyl phosphate monopotassium salt, mono 2-ethylhexyl phosphate dipotassium salt, polyoxyethylene 8-mol adduct mono 2-ethylhexyl phosphate, polyoxyethylene 8-mol adduct mono 2-ethylhexyl phosphate monopotassium salt, polyoxyethylene 8-mol adduct mono 2-ethylhexyl phosphate dipotassium salt, monoisolauryl phosphate, monoisolauryl phosphate monopotassium salt, monoisolauryl phosphate dipotassium salt, polyoxyethylene Examples of such phosphates include monoisolauryl phosphate with 9 moles of polyoxyethylene added, monoisolauryl phosphate monopotassium salt with 9 moles of polyoxyethylene added, monoisolauryl phosphate dipotassium salt with 9 moles of polyoxyethylene added, monoisostearyl phosphate, monoisostearyl phosphate monopotassium salt, monoisostearyl phosphate dipotassium salt with 15 moles of polyoxyethylene added, monoisostearyl phosphate monopotassium salt with 15 moles of polyoxyethylene added, monoisostearyl phosphate dipotassium salt with 15 moles of polyoxyethylene added, etc. Among these, in terms of instantaneous water permeability and repeated water permeability, monoisostearyl phosphate monopotassium salt, monoisostearyl phosphate dipotassium salt, monoisostearyl phosphate monopotassium salt, monoisolauryl phosphate monopotassium salt, monoisostearyl phosphate monopotassium salt, and monoisostearyl phosphate dipotassium salt are preferred. Furthermore, from the viewpoint of foam-inhibiting properties, polyoxyethylene 8-mol-added mono-2-ethylhexyl phosphate monopotassium salt, polyoxyethylene 8-mol-added mono-2-ethylhexyl phosphate dipotassium salt, polyoxyethylene 9-mol-added monoisolauryl phosphate monopotassium salt, polyoxyethylene 9-mol-added monoisolauryl phosphate dipotassium salt, polyoxyethylene 15-mol-added monoisostearyl phosphate monopotassium salt, and polyoxyethylene 15-mol-added monoisostearyl phosphate dipotassium salt are preferred.

[0013] [Compound (B)] Compound (B) is a compound represented by the above general formula (2). In formula (2), R ２ and R ３ are each independently a hydrocarbon group having 6 to 22 carbon atoms. In terms of instantaneous water permeability, the upper limit of the carbon number is preferably 16, more preferably 14, and even more preferably 12, and the lower limit of the carbon number is preferably 6, more preferably 7, and even more preferably 8. In terms of repeated water permeability, the upper limit of the carbon number is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the carbon number is preferably 10, more preferably 11, and even more preferably 12. In terms of instantaneous water permeability, for example, 6 to 16 is preferred, and in terms of repeated water permeability, 10 to 20 is preferred. R ２ and R ３ At least one selected from has a branch; ２ and R ３ If R has a branch, it is preferable in terms of foam suppression. ２ and R ３ may be the same or different.

[0014] In formula (2), AO is an oxyalkylene group having 2 to 4 carbon atoms. m, which is the number of repetitions of the oxyalkylene unit, is an integer of 0 to 20. In terms of foam-suppressing properties, the upper limit of the number of repetitions m is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the number of repetitions m is preferably 3, more preferably 5, and even more preferably 7. In terms of instantaneous water permeability and repeated water permeability, the upper limit of the number of repetitions m is preferably 9, more preferably 8, and even more preferably 7, and the lower limit of the number of repetitions m is preferably 0, more preferably 1, and even more preferably 2. For example, in terms of foam-suppressing properties, the number is preferably 3 to 20, and in terms of instantaneous water permeability and repeated water permeability, 0 to 9 is more preferred. (AO) ｍ When there are two of them, they may be the same or different.

[0015] In formula (2), M １ is a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. １is preferably a hydrogen atom or an alkali metal in terms of emulsion stability and antistatic properties. Examples of alkali metals include potassium, sodium, and lithium, and potassium or sodium is preferred in terms of emulsion stability and antistatic properties. Examples of organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, and triethylamine. Examples of quaternary ammoniums include alkyltrimethylammonium and dialkyldimethylammonium.

[0016] Specific examples of compound (B) include, but are not limited to, di-2-ethylhexyl phosphate, di-2-ethylhexyl phosphate potassium salt, di(8-mol-added mono-2-ethylhexyl polyoxyethylene)phosphate, di(8-mol-added mono-2-ethylhexyl polyoxyethylene)phosphate potassium salt, diisolauryl phosphate, diisolauryl phosphate potassium salt, di(9-mol-added monoisolauryl polyoxyethylene)phosphate, di(9-mol-added monoisolauryl polyoxyethylene)phosphate, phosphate, di(monoisolauryl)phosphate potassium salt, diisostearyl phosphate, diisostearyl phosphate potassium salt, di(monoisostearyl)phosphate (15 moles of polyoxyethylene added) phosphate, di(monoisostearyl)phosphate (15 moles of polyoxyethylene added) potassium salt, mono-2-ethylhexyl monooctyl phosphate potassium salt, mono(2-ethylhexyl)monoctyl phosphate potassium salt, etc. Among these, di-2-ethylhexyl phosphate potassium salt, diisolauryl phosphate potassium salt, and diisostearyl phosphate potassium salt are preferred in terms of instantaneous water permeability and repeated water permeability. Furthermore, di(mono-2-ethylhexyl)phosphate (8 moles of polyoxyethylene added) potassium salt, di(monoisolauryl)phosphate (9 moles of polyoxyethylene added) and di(monoisostearyl)phosphate potassium salt are preferred in terms of foam-suppressing properties.

[0017] [Compound (C)] Compound (C) is a compound represented by the above general formula (3), and the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment preferably contain compound (C) in terms of foam suppression. ４ and R ５ are each independently a hydrocarbon group having 6 to 22 carbon atoms. In terms of instantaneous water permeability, the upper limit of the carbon number is preferably 16, more preferably 14, and even more preferably 12, and the lower limit of the carbon number is preferably 6, more preferably 7, and even more preferably 8. In terms of repeated water permeability, the upper limit of the carbon number is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the carbon number is preferably 10, more preferably 11, and even more preferably 12. In terms of instantaneous water permeability, the carbon number is preferably 6 to 16, and in terms of repeated water permeability, the carbon number is preferably 10 to 20. ２ If R ４ has a branch, and Q is -(AO) ｍ R ５ If R ４ and R ５ At least one selected from the group consisting of -(AO) ｍ R ５ If R ４ and R ５ It is preferable that R has a branched chain in terms of foam suppression. ４ and R ５ may be the same or different.

[0018] In formula (3), AO is an oxyalkylene group having 2 to 4 carbon atoms. m, which is the number of repetitions of the oxyalkylene unit, is an integer of 0 to 20. In terms of foam-suppressing properties, the upper limit of the number of repetitions m is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the number of repetitions m is preferably 3, more preferably 5, and even more preferably 7. In terms of instantaneous water permeability and repeated water permeability, the upper limit of the number of repetitions m is preferably 9, more preferably 8, and even more preferably 7, and the lower limit of the number of repetitions m is preferably 0, more preferably 1, and even more preferably 2. For example, in terms of foam-suppressing properties, the number is preferably 3 to 20, and in terms of instantaneous water permeability and repeated water permeability, 0 to 9 is more preferred. (AO) ｍWhen there are two of them, they may be the same or different.

[0019] In formula (3), M １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. １ and M ２ is preferably a hydrogen atom or an alkali metal from the viewpoint of emulsion stability and antistatic properties. １ and M ２ may be the same or different. Examples of alkali metals include potassium, sodium, and lithium, with potassium or sodium being preferred in terms of emulsion stability and antistatic properties. Examples of organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, as well as triethylamine. Examples of quaternary ammoniums include alkyltrimethylammonium and dialkyldimethylammonium.

[0020] In formula (3), Q is M ２ Or - (AO) ｍ R ５ In formula (3), Y is 1 or 2. ２ When there are two or more, they may be the same or different.

[0021] Specific examples of compound (C) include, but are not limited to, pyro-2-ethylhexyl phosphate (potassium salt), pyro(2-ethylhexyl with 8 moles of polyoxyethylene added) phosphate (potassium salt), pyroisolauryl phosphate (potassium salt), pyro(isolauryl with 9 moles of polyoxyethylene added) phosphate (potassium salt), pyroisostearyl phosphate (potassium salt), pyro(isostearyl with 15 moles of polyoxyethylene added) phosphate (potassium salt), etc. Among these, pyro-2-ethylhexyl phosphate (potassium salt), pyroisolauryl phosphate (potassium salt), and pyroisostearyl phosphate (potassium salt) are preferred in terms of instantaneous water permeability and repeated water permeability. In addition, in terms of foam-suppressing properties, pyro(8-mol-added 2-ethylhexyl polyoxyethylene)phosphate (potassium salt), pyro(9-mol-added isolauryl polyoxyethylene)phosphate (potassium salt), and pyro(15-mol-added isostearyl polyoxyethylene)phosphate (potassium salt) are preferred.

[0022] [Compound (D)] Compound (D) is a compound represented by the above general formula (4), and the water permeability imparting agent of the first embodiment and the treating agent for nonwoven fabric production of the second embodiment preferably contain compound (D) in terms of foam suppression. ６ , R ７ and R ８ are each independently a hydrocarbon group having 6 to 22 carbon atoms, and from the viewpoint of instantaneous water permeability, the upper limit of the carbon number is preferably 16, more preferably 14, and even more preferably 12, and the lower limit of the carbon number is preferably 6, more preferably 7, and even more preferably 8. Furthermore, from the viewpoint of repeated water permeability, the upper limit of the carbon number is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the carbon number is preferably 10, more preferably 11, and even more preferably 12. Furthermore, for example, from the viewpoint of instantaneous water permeability, 6 to 16 is preferable, and from the viewpoint of repeated water permeability, 10 to 20 is preferable. R ６ , R ７ and R ８ At least one selected from has a branch; ６ , R ７ and R ８ It is preferable that R has a branched chain in terms of foam suppression.６ , R ７ and R ８ may be the same or different.

[0023] In formula (4), AO is an oxyalkylene group having 2 to 4 carbon atoms. m, which is the number of repetitions of the oxyalkylene unit, is an integer of 0 to 20. In terms of foam-suppressing properties, the upper limit of the number of repetitions m is preferably 20, more preferably 18, and even more preferably 16, and the lower limit of the number of repetitions m is preferably 3, more preferably 5, and even more preferably 7. In terms of instantaneous water permeability and repeated water permeability, the upper limit of the number of repetitions m is preferably 9, more preferably 8, and even more preferably 7, and the lower limit of the number of repetitions m is preferably 0, more preferably 1, and even more preferably 2. For example, in terms of foam-suppressing properties, the number is preferably 3 to 20, and in terms of instantaneous water permeability and repeated water permeability, 0 to 9 is more preferred. (AO) ｍ When there are two or more, they may be the same or different.

[0024] Specific examples of compound (D) include, but are not limited to, tri-2-ethylhexyl phosphate, tri(2-ethylhexyl polyoxyethylene 8 mol added) phosphate, triisolauryl phosphate, tri(isolauryl polyoxyethylene 9 mol added) phosphate, triisostearyl phosphate, tri(isostearyl polyoxyethylene 15 mol added) phosphate, di-2-ethylhexyl monooctyl phosphate, di(2-ethylhexyl polyoxyethylene 8 mol added) monooctyl phosphate, etc. Among these, tri-2-ethylhexyl phosphate, triisolauryl phosphate, and triisostearyl phosphate are preferred in terms of instantaneous water permeability and repeated water permeability. Furthermore, tri(2-ethylhexyl polyoxyethylene 8 mol added) phosphate, tri(isolauryl polyoxyethylene 9 mol added) phosphate, and tri(isostearyl polyoxyethylene 15 mol added) phosphate are preferred in terms of foam-suppressing properties.

[0025] [Inorganic Phosphate (Salt) (IN)] In terms of foam-suppressing properties, the water-permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment preferably contain inorganic phosphoric acid (salt) (IN). The inorganic phosphoric acid (salt) (IN) is at least one selected from phosphoric acid, metal dihydrogen phosphate, dimetal hydrogen phosphate, and trimetal phosphate. Specific examples of the monometal dihydrogen phosphate include monopotassium dihydrogen phosphate and monosodium dihydrogen phosphate. Examples of the dimetal hydrogen phosphate include dipotassium hydrogen phosphate and disodium hydrogen phosphate. Examples of the trimetal phosphate include tripotassium phosphate and trisodium phosphate.

[0026] [Nonionic Surfactant (E)] The water permeability imparting agent of the first embodiment and the treating agent for nonwoven fabric production of the second embodiment preferably contain a nonionic surfactant (E) in terms of repeated water permeability and emulsion stability. The nonionic surfactant (E) is not particularly limited, but preferred examples include ester compounds (E1) having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded and having one or more hydroxyl groups in the molecule, polyoxyalkylene castor oil ethers (E2), polyoxyalkylene hydrogenated castor oil ethers (E3), polyoxyalkylene aliphatic alcohol ethers (E4), PEG esters (E5), and polycarboxylic acid esters (E6).

[0027] The ester compound (E1) is a compound having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and having one or more hydroxyl groups in the molecule.

[0028] The polyhydric alcohol serving as a constituent of the ester compound (E1) is not particularly limited, but sorbitol and glycerin are preferred in terms of instantaneous water permeability and foam-suppressing properties. The fatty acid serving as a constituent of the ester compound (E1) is not particularly limited, but saturated and / or unsaturated fatty acids having 12 to 18 carbon atoms are preferred in terms of instantaneous water permeability and foam-suppressing properties.

[0029] The ester compound (E1) is not particularly limited, but from the viewpoints of instantaneous water permeability and foam-suppressing property, sorbitan monoesters, sorbitan diesters, sorbitan triesters, glycerin monoesters, glycerin diesters, and polyglycerin esters are preferred, and sorbitan monoesters are more preferred. Examples of sorbitan monoesters include sorbitan monostearate, sorbitan monooleate, sorbitan monopalmitate, and sorbitan monolaurate. Examples of sorbitan diesters include sorbitan distearate, sorbitan dioleate, sorbitan dipalmitate, and sorbitan dilaurate. Examples of sorbitan triesters include sorbitan tristearate, sorbitan trioleate, sorbitan tripalmitate, and sorbitan trilaurate. Examples of glycerin monoesters include glycerin monostearate and glycerin monooleate. Examples of glycerin diesters include glycerin distearate, glycerin dioleate, glycerin dipalmitate, and glycerin dilaurate. Examples of polyglycerin esters include hexaglycerin monostearate.

[0030] The polyoxyalkylene castor oil ether (E2) is a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to castor oil. The polyoxyalkylene castor oil ether (E2) is not particularly limited, but examples thereof include polyoxyethylene castor oil ether (polyoxyethylene (1 to 25 mol) castor oil ether).

[0031] Polyoxyalkylene hydrogenated castor oil ether (E3) is a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to hydrogenated castor oil. The polyoxyethylene hydrogenated castor oil ether (E3) is not particularly limited, but examples thereof include polyoxyethylene hydrogenated castor oil ether (polyoxyethylene (1 to 25 moles) hydrogenated castor oil ether).

[0032] The polyoxyalkylene aliphatic alcohol ether (E4) is a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to an aliphatic monohydric alcohol and / or an aliphatic polyhydric alcohol. The aliphatic monohydric alcohol constituting the polyoxyalkylene aliphatic alcohol ether (E4) is not particularly limited, but from the viewpoint of instantaneous water permeability, alcohols having 8 to 18 carbon atoms are preferred, and octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oleyl alcohol are more preferred. The aliphatic polyhydric alcohol constituting the polyoxyalkylene aliphatic alcohol ether (E4) is not particularly limited, but from the viewpoint of instantaneous water permeability, alcohols having 8 to 18 carbon atoms are preferred, and glycerin, sorbitol, sorbitan, and trimethylolpropane are more preferred. The number of moles of alkylene oxide added to the polyoxyalkylene aliphatic alcohol ether (E4) is preferably 1 to 100 moles from the viewpoint of instantaneous water permeability. The upper limit of the number of moles added is more preferably 70 moles, even more preferably 50 moles, and particularly preferably 30 moles. On the other hand, the lower limit of the number of moles added is more preferably 2 moles, even more preferably 3 moles, and particularly preferably 4 moles. Also, for example, 2 to 70 moles is more preferable, and 3 to 50 moles is even more preferable. The proportion of ethylene oxide relative to the total alkylene oxide is not particularly limited, but from the viewpoint of instantaneous water permeability, it is preferably 20 mol% or more, more preferably 30 mol% or more, and even more preferably 40 mol% or more. From the viewpoint of foam-suppressing property, the upper limit of the proportion of ethylene oxide is preferably 100 mol% or less, more preferably 95 mol% or less, and even more preferably 90 mol% or less.

[0033] The polyoxyalkylene aliphatic alcohol ether (E4) is not particularly limited, but examples thereof include polyoxyalkylene aliphatic alcohol ethers (polyoxyethylene (1 to 20 moles) stearyl ether, polyoxyethylene (1 to 20 moles) oleyl ether, polyoxyalkylene (1 to 20 moles) palmityl ether, and polyoxyalkylene (1 to 20 moles) lauryl ether. The polyoxyalkylene group in the polyoxyalkylene aliphatic alcohol ether (E4) may be a polyoxyalkylene group composed of oxyethylene units and / or oxypropylene units, and preferably contains oxyethylene units. When the polyoxyalkylene group contains oxyethylene units and oxypropylene units, the addition type of the oxyethylene units and oxypropylene units may be block or random.

[0034] Regarding PEG ester (E5), PEG refers to polyethylene glycol, and refers to a polyethylene glycol ester (hereinafter referred to as PEG ester) having a structure in which a hydroxyl group of PEG and a monovalent fatty acid are esterified. The number of carbon atoms in the monovalent fatty acid is not particularly limited, but from the viewpoint of foam suppression, 4 to 24 is preferable. The upper limit of the carbon number is more preferably 22, and even more preferably 20. On the other hand, the lower limit of the carbon number is more preferably 10, and even more preferably 12. Also, for example, 10 to 22 is more preferable, and even more preferably 12 to 20. The monovalent fatty acid may be a saturated fatty acid or an unsaturated fatty acid. Examples of PEG ester (E5) include polyoxyethylene (1 to 20 mol) stearyl ester, polyoxyethylene (1 to 20 mol) oleyl ester, polyoxyethylene (1 to 20 mol) palmityl ester, and polyoxyethylene (1 to 20 mol) lauryl ester.

[0035] The polycarboxylic acid ester (E6) is a compound having a structure in which a polycarboxylic acid and a polyol are ester-bonded. The polycarboxylic acid is preferably a divalent or higher carboxylic acid having 10 to 66 carbon atoms. Examples of the polycarboxylic acid include sebacic acid, oleic acid dimer, erucic acid dimer, oleic acid trimer, and erucic acid trimer. Among the polycarboxylic acids, a dimer acid of an unsaturated fatty acid having 18 to 22 carbon atoms is preferred, and a dimer acid of an unsaturated fatty acid having 18 carbon atoms is more preferred. The polycarboxylic acid may be an aliphatic polycarboxylic acid or an aromatic polycarboxylic acid, and an aliphatic polycarboxylic acid is preferred. The polyol is a divalent or higher alcohol having an oxyalkylene group having 2 to 3 carbon atoms in the molecule. The polyol is not particularly limited as long as it is a dihydric or higher alcohol and has a (poly)oxyalkylene group in the molecule, but examples thereof include polyalkylene glycols composed of oxyethylene units and / or oxypropylene units, polyoxyalkylene sorbitan, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene glycerin, polyoxyalkylene polyglycerin, polyoxyalkylene polyglycerin esters, etc. Among these, polyalkylene glycols composed of oxyethylene units and / or oxypropylene units are preferred. Examples of polyalkylene glycols composed of oxyethylene units and / or oxypropylene units include polyoxyethylene glycol, polypropylene glycol, polyoxyethylene polyoxypropylene glycol, etc. Polyoxyethylene polyoxypropylene glycol may be a block or random product. Examples of polyalkylene glycols composed of oxyethylene units and / or oxypropylene units include polyoxyethylene glycol. The number average molecular weight of the polyalkylene glycol is preferably 100 to 10,000, more preferably 200 to 2,000, and even more preferably 400 to 1,000.

[0036] [Other Components] The water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment may contain the following anionic surfactant (F), amphoteric surfactant (G), and modified silicone (H) as other components in order to achieve the effects of the present invention. The anionic surfactant (F) is not particularly limited as long as it is an anionic surfactant other than compound (A), compound (B), compound (C), and compound (D), but alkyl sulfate salts, alkyl sulfonate salts, dialkyl sulfosuccinate salts, etc. are preferred. Examples of alkyl sulfate salts include alkyl sulfate salts having a structure obtained by sulfating and neutralizing a polyhydric alcohol fatty acid ester. 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. Examples of 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, alkaline earth metal oxides and hydroxides such as calcium oxide, calcium hydroxide, magnesium oxide, and magnesium hydroxide, ammonia, mono-, di-, and trialkanolamines having 2 to 4 carbon atoms in the hydroxyalkyl chain, and primary, secondary, and tertiary alkylamines having 1 to 4 carbon atoms in the alkyl chain. Two or more basic substances may be used in combination. The fatty acid used in the synthesized polyhydric alcohol fatty acid ester product essentially contains an unsaturated fatty acid and may also contain saturated fatty acids, hydroxy fatty acids, or hydroxy unsaturated fatty acids. Preferred alkyl sulfate salts are polyhydric alcohol fatty acid ester sulfate salts. Dialkyl sulfosuccinate salts are dialkyl esters of succinic acid having a sulfonate group at the α-position. The alkyl group constituting the dialkyl ester preferably has 6 to 18 carbon atoms. The upper limit of the alkyl group is more preferably 16, further preferably 14, and particularly preferably 13. On the other hand, the lower limit of the alkyl group is more preferably 7, further preferably 8, and particularly preferably 9. Furthermore, for example, 8 to 18 are more preferable, and 10 to 13 are more preferable.

[0037] [Water-permeability imparting agent and treatment agent for nonwoven fabric production] The water-permeability imparting agent of a first embodiment and the treatment agent for nonwoven fabric production of a second embodiment comprise a compound (A) represented by the general formula (1) above and a compound (B) represented by the general formula (2) above, and at least one selected from a compound (C) represented by the general formula (3), a compound (D) represented by the general formula (4) above, and an inorganic phosphoric acid (salt) (IN), wherein the non-volatile components of the water-permeability imparting agent and the treatment agent for nonwoven fabric production described below each have an acid value of 0.5 to 450 mg KOH / g, and the non-volatile components of the water-permeability imparting agent and the treatment agent for nonwoven fabric production described below are measured by P nuclear NMR, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in the spectra measured [P1 / (P1+P2+P3)] is 40 to 100%. The water-permeability imparting agent of the first embodiment and the treating agent for nonwoven fabric production of the second embodiment are not particularly limited, but it is believed that by satisfying these requirements, the foam film will be weakened and excellent foam-suppressing properties will be achieved.

[0038] The acid values ​​of the nonvolatile content of the water-permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment are each 0.5 to 450 mgKOH / g. It is believed that an acid value of 0.5 to 450 mgKOH / g reduces foam film stability and therefore provides excellent foam suppression. Furthermore, an acid value of less than 0.5 mgKOH / g reduces foam suppression, while an acid value of more than 450 mgKOH / g results in insufficient instantaneous and repeated water permeability. The upper limit of the acid value of the nonvolatile content of the water-permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment is preferably 400 mgKOH / g, more preferably 300 mgKOH / g, and even more preferably 200 mgKOH / g, from the viewpoint of antistatic properties. Meanwhile, the lower limit of the acid value is preferably 5 mgKOH / g, more preferably 10 mgKOH / g, and even more preferably 15 mgKOH / g, from the viewpoint of foam suppression. In the present invention, the non-volatile content of the water-permeability imparting agent and the non-volatile content of the treating agent for nonwoven fabric production refer to the amount of the water-permeability imparting agent or the treating agent for nonwoven fabric production remaining on the aluminum sheet when 2.0 to 3.0 g of the agent is spread evenly on an aluminum sheet, dried at 110°C under irradiation with an infrared lamp, and the fluctuation range of the volatile content over 150 seconds reaches 0.15%.

[0039] The nonvolatile content of the water-permeability agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment were measured by P nuclear NMR, and the ratio of P1 to the sum of the following peak areas P1 to P3 (P1 + P2 + P3) [P1 / (P1 + P2 + P3)] was 40 to 100%. P1: Peak area in the range of 0 to 10 ppm P2: Peak area in the range of -25 to -3 ppm P3: Peak area in the range of -3 to 0 ppm Compounds showing peaks in the spectrum from -25 to 10 ppm tend to be mainly inorganic phosphoric acid or compound (A), compound (B), compound (D), and compound (C), in that order, from the low magnetic field side. It is believed that if [P1 / (P1 + P2 + P3)] is 40 to 100%, foam film stability is reduced, resulting in excellent foam suppression. If the P1 / (P1+P2+P3) ratio is less than 40%, the instantaneous water permeability and repeated water permeability will be insufficient. The upper limit of the P1 ratio is preferably 90%, more preferably 80%, and even more preferably 75%, in terms of instantaneous water permeability and repeated water permeability. On the other hand, the lower limit of P1 / (P1+P2+P3) is preferably 40%, more preferably 45%, and even more preferably 50%, in terms of foam-suppressing properties. For example, 40 to 90% is preferred, 45 to 85% is more preferred, and 50 to 75% is even more preferred. The peak areas of P1 to P3 are measured by the method described in the Examples.

[0040] When the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment are each made into an aqueous dispersion with a nonvolatile content of 1%, the dynamic surface tension at a lifetime of 1000 ms is preferably 25 to 60 mN / m in terms of processability, instantaneous water permeability, and repeated water permeability. In terms of processability, the upper limit of the dynamic surface tension is preferably 58 mN / m, more preferably 55 mN / m, and even more preferably 50 mN / m. Meanwhile, the lower limit of the dynamic surface tension is preferably 25.5 mN / m, more preferably 26 mN / m, and even more preferably 26.5 mN / m. Furthermore, for example, in terms of instantaneous water permeability, 25.5 to 58 mN / m is more preferable, 26 to 55 mN / m is even more preferable, and 26.5 to 50 mN / m is particularly preferable. The dynamic surface tension of the water-permeable agent and the treating agent for nonwoven fabric production in an aqueous dispersion with a nonvolatile content of 1% after a life time of 1000 ms was measured by the method described in the Examples.

[0041] The total proportion of compound (A), compound (B), compound (C), compound (D), and inorganic phosphate (salt) (IN) in the non-volatile content of the water permeability imparting agent of the first embodiment and the non-volatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 5 to 95 wt% in terms of antistatic properties, instantaneous water permeability, and repeated water permeability. The upper limit of this proportion is more preferably 90 wt%, even more preferably 80 wt%, and particularly preferably 70 wt%. Meanwhile, the lower limit of this proportion is more preferably 10 wt%, even more preferably 15 wt%, and particularly preferably 20 wt%. Furthermore, for example, 10 to 90 wt% is more preferable, and 15 to 80 wt% is even more preferable. Furthermore, for example, 20 to 90 wt% is preferable in terms of instantaneous water permeability and foam suppression, and 10 to 70% is preferable in terms of repeated water permeability.

[0042] The proportion of compound (A) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 13 to 73 wt% in terms of antistatic properties, instantaneous water permeability, repeated water permeability, and in terms of easily satisfying the specific P1 / (P1+P2+P3) of the present invention. The upper limit of this proportion is more preferably 73 wt%, even more preferably 45 wt%, and particularly preferably 30 wt%. Meanwhile, the lower limit of this proportion is more preferably 13 wt%, even more preferably 22 wt%, and particularly preferably 25 wt%. Furthermore, for example, 22 to 45 wt% is more preferable, and 25 to 30 wt% is even more preferable.

[0043] The proportion of compound (B) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 13 to 56 wt% in terms of antistatic properties, instantaneous water permeability, repeated water permeability, and ease of satisfying the specific P1 / (P1+P2+P3) of the present invention. The upper limit of this proportion is more preferably 56 wt%, even more preferably 45 wt%, and particularly preferably 40 wt%. Meanwhile, the lower limit of this proportion is more preferably 13 wt%, even more preferably 20 wt%, and particularly preferably 30 wt%. Furthermore, for example, 20 to 45 wt% is more preferable, and 30 to 40 wt% is even more preferable.

[0044] The proportion of compound (C) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 0 to 61 wt% in terms of antistatic properties, instantaneous water permeability, repeated water permeability, and in terms of easily satisfying the specific P1 / (P1+P2+P3) of the present invention. The upper limit of this proportion is more preferably 61 wt%, even more preferably 40 wt%, and particularly preferably 37 wt%. Meanwhile, the lower limit of this proportion is more preferably 2 wt%, even more preferably 5 wt%, and particularly preferably 20 wt%. Furthermore, for example, 2 to 50 wt% is more preferable, and 5 to 40 wt% is even more preferable.

[0045] The proportion of compound (D) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 0 to 2 wt % in terms of antistatic properties, instantaneous water permeability, repeated water permeability, and in terms of easily satisfying the specific P1 / (P1+P2+P3) of the present invention. The upper limit of this proportion is more preferably 2 wt %, even more preferably 1 wt %, and particularly preferably 0.5 wt %. Meanwhile, the lower limit of this proportion is more preferably 0.1 wt %, even more preferably 0.2 wt %, and particularly preferably 0.4 wt %. Furthermore, for example, 0.1 to 2 wt % is more preferable, and 0.2 to 1 wt % is even more preferable.

[0046] The proportion of inorganic phosphoric acid (salt) (IN) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the nonvolatile content of the treatment agent for nonwoven fabric production of the second embodiment is not particularly limited, but is preferably 0 to 8 wt% in terms of antistatic properties, instantaneous water permeability, repeated water permeability, and ease of satisfying the specific P1 / (P1+P2+P3) of the present invention. The upper limit of this proportion is more preferably 8 wt%, even more preferably 1 wt%, and particularly preferably 0.5 wt%. Meanwhile, the lower limit of this proportion is more preferably 0 wt%, even more preferably 0.1 wt%, and particularly preferably 0.2 wt%. Furthermore, for example, 0 to 1 wt% is more preferable, and 0.1 to 0.5 wt% is even more preferable.

[0047] The ratios of compound (A), compound (B), compound (C), and compound (D) used in the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment can be changed by changing the ratio of alcohol to tetraphosphorus 10 oxide. Furthermore, the proportion of compound (A) can be increased by using phosphoric acid in the reaction.

[0048] The proportion of the nonionic surfactant (E) in the nonvolatile content of the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment is preferably 5 to 95% by weight in terms of repeated water permeability, emulsion stability, and antistatic properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 85% by weight, and particularly preferably 80% by weight. Meanwhile, the lower limit of this proportion is more preferably 10% by weight, even more preferably 20% by weight, and particularly preferably 30% by weight. Furthermore, for example, 10 to 90% by weight is more preferable, and 20 to 85% by weight is even more preferable. Furthermore, for example, 20 to 90% by weight is preferable in terms of instantaneous water permeability and foam suppression, and 10 to 70% is preferable in terms of repeated water permeability.

[0049] The proportion of the anionic surfactant (F) in the nonvolatile components of the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment is preferably 5 to 95% by weight in terms of repeated water permeability, emulsion stability, and antistatic properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 85% by weight, and particularly preferably 80% by weight. Meanwhile, the lower limit of this proportion is more preferably 8% by weight, even more preferably 10% by weight, and particularly preferably 15% by weight. Also, for example, 8 to 90% by weight is more preferable, and 10 to 85% by weight is even more preferable.

[0050] The water-permeability imparting agent of the first aspect is not particularly limited as long as it imparts water permeability to an object, but it may be one that temporarily imparts water permeability to an object during the manufacturing process of fibers, nonwoven fabrics, etc., or one that imparts water permeability to a final product to which the water-permeability imparting agent has been applied. For example, the water-permeability imparting agent may be attached to fibers to produce a nonwoven fabric, and then the nonwoven fabric may be used to impart water permeability to an absorbent article.

[0051] The treating agent for nonwoven fabric production of the second aspect is not particularly limited as long as it is used in the production of nonwoven fabric, but it may be a treating agent used in the production of nonwoven fabric described below. The treating agent for nonwoven fabric production improves the processability of nonwoven fabric production by adhering the treating agent to fibers. For example, it can be used to suppress static electricity generation when passing through a card or to impart hydrophilicity during spunlace.

[0052] [Fibers and fiber manufacturing method] The fibers of the present invention are obtained by applying the water permeability imparting agent or the treatment agent for nonwoven fabric production to a fiber body. The fibers of the present invention may be short fibers or long fibers, and short fibers are preferred in terms of instantaneous water permeability and repeated water permeability. The adhesion rate of the nonvolatile content of the water permeability imparting agent or the treatment agent for nonwoven fabric production to the fiber body is preferably 0.03 to 2 wt %, more preferably 0.1 to 1 wt %, based on the fiber body in terms of antistatic properties and instantaneous water permeability and repeated water permeability.

[0053] The fiber manufacturing method of the present invention is not particularly limited as long as it includes a step of applying the water-permeability imparting agent of the first aspect or the treatment agent for nonwoven fabric production of the second aspect to raw fibers, and known methods can be used for the other steps. Raw fibers refer to fibers to which the water-permeability imparting agent of the first aspect or the treatment agent for nonwoven fabric production of the second aspect has not been applied. Applying the water-permeability imparting agent of the first aspect or the treatment agent for nonwoven fabric production of the second aspect to fibers allows for efficient production of fibers of stable quality.

[0054] Examples of the fiber body include polyolefin fibers, polyester fibers, nylon fibers, vinyl chloride fibers, and composite fibers made of two or more thermoplastic resins. Examples of composite fiber combinations include polyolefin resin / polyolefin resin combinations, such as high-density polyethylene / polypropylene, linear high-density polyethylene / polypropylene, low-density polyethylene / polypropylene, a binary or terpolymer of propylene and another α-olefin / 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 copolymer polyester / polyethylene terephthalate. Other examples include fibers made of polyamide resin / polyester resin, polyolefin resin / polyamide resin, and the like. Among these fiber bodies, the water-permeability imparting agent of the first aspect and the treatment agent for nonwoven fabric production of the second aspect are suitable for hydrophobic synthetic fibers such as polyolefin fibers (polyolefin fibers or composite fibers containing polyolefin fibers) and polyester fibers (polyester fibers or composite fibers containing polyester fibers), because soft touch is preferred, and polyolefin fibers are even more suitable. Furthermore, when these fiber bodies are fibers for nonwoven fabric production, they are preferred in terms of water permeability.

[0055] The cross-sectional structure of the fiber can be exemplified by sheath-core, side-by-side, eccentric sheath-core, multilayer, radial, or sea-island structures. However, from the viewpoint of productivity in the fiber production process and ease of nonwoven fabric processing, the sheath-core structure including eccentricity or the side-by-side structure is preferred. The cross-sectional shape can be circular or irregular. In the case of irregular shapes, any shape can be used, such as flat, polygonal (e.g., triangular to octagonal), T-shaped, hollow, or multi-lobed.

[0056] The water-permeability-imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment may be applied to the fiber body directly without dilution, or may be applied to the fiber body after diluting with water or the like to a concentration such that the weight ratio of nonvolatile matter is 0.5 to 5 wt %. The process for applying the water-permeability-imparting agent and the treatment agent for nonwoven fabric production to the fiber body may be any process, such as the fiber body spinning process, drawing process, or crimping process. The means for applying the water-permeability-imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment to the fiber body are not particularly limited, and methods such as roller oiling, nozzle spray oiling, and dip oiling may be used. A method that achieves the desired amount of adhesion more uniformly and efficiently may be adopted, depending on the fiber production process and its characteristics. Furthermore, drying methods such as hot air and infrared drying, and drying by contact with a heat source may be used.

[0057] [Nonwoven Fabric] The nonwoven fabric of the present invention may be a nonwoven fabric obtained by applying the water-permeability imparting agent of the first embodiment or the treatment agent for nonwoven fabric production of the second embodiment to a raw nonwoven fabric that has not been applied with the water-permeability imparting agent of the first embodiment or the treatment agent for nonwoven fabric production of the second embodiment, or a nonwoven fabric made from fibers to which the water-permeability imparting agent of the first embodiment or the treatment agent for nonwoven fabric production of the second embodiment has been applied. The method for producing the nonwoven fabric of the present invention is not particularly limited, and known methods can be used. Staple fibers or long fibers can be used as the raw fibers. Examples of web formation methods using staple fibers include dry methods such as carding and air-laid methods, and wet methods such as papermaking. Examples of web formation methods using long fibers include spunbonding, meltblowing, and flash spinning. Examples of interfiber bonding methods include chemical bonding, thermal bonding, needle punching, spunlace, and stitch bonding. The method for producing a nonwoven fabric of the present invention preferably includes a step of passing the fibers of the present invention through a carding machine or the like to produce a fiber web and heat-treating the resulting fiber web. That is, the water-permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment are particularly suitable for use when the nonwoven fabric production process includes a step of heat-treating the fiber web. Examples of methods for bonding a fiber web by heat treatment include thermal fusion methods such as thermocompression bonding using a heated roll or ultrasonic waves, heat fusion bonding using heated air, and point bonding. As an example of heat-treating a fiber web to bond it, in the case of sheath-core composite fibers 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 facilitate thermal bonding of the fiber intersections. Examples of methods for producing nonwoven fabrics include a method in which staple fibers to which the water-permeability imparting agent of the first embodiment or the treatment agent for production of nonwoven fabrics of the second embodiment has been imparted are passed through a carding machine or the like to form a web, which is then heat-treated as described above to bond and integrate the web; and a method in which, when laminating pulp or the like by an air-laid method, the staple fibers to which the water-permeability imparting agent of the first embodiment or the treatment agent for production of nonwoven fabrics of the second embodiment has been adhered are mixed with the pulp, and the mixture is then heat-treated as described above to bond the pulp and the like.Other examples include a method of producing a nonwoven fabric by adhering the water permeability imparting agent of the first embodiment and the treatment agent for nonwoven fabric production of the second embodiment to a fiber molded article obtained by a spunbonding method, a melt-blowing method, a flash spinning method, or the like, and then heat-treating the resulting article with heated rolls or heated air, or by adhering the water permeability imparting agent of the first embodiment or the treatment agent for nonwoven fabric production of the second embodiment to the product that has been heat-treated with heated rolls or heated air, or the like.

[0058] In one example of the spunbonding method, a composite fiber resin is spun, followed by cooling the spun composite long fiber filaments with a cooling fluid and applying tension to the filaments with drawing air to achieve the desired fineness. The spun filaments are then collected on a collection belt and bonded to obtain a spunbonded nonwoven fabric. Bonding methods include thermocompression bonding using a heated roll or ultrasonic waves, heat fusion bonding using heated air, and point bonding. The water-permeability imparting agent of the first embodiment or the nonwoven fabric-producing treatment agent of the second embodiment can be applied to the resulting spunbonded nonwoven fabric by roll coating methods such as gravure, flexography, and gate roll methods, spray coating, or the like, but are not particularly limited as long as the amount applied to the nonwoven fabric can be adjusted on each side. Drying methods include drying with hot air or infrared radiation, drying by contact with a heat source, and the like.

[0059] [Absorbent Article] The absorbent article of the present invention comprises the nonwoven fabric of the present invention. Examples of the absorbent article of the present invention include disposable diapers and sanitary napkins (e.g., sanitary napkins). In the absorbent article of the present invention, the nonwoven fabric of the present invention is preferably used as a top sheet of sanitary materials such as disposable diapers and sanitary napkins. It can also be used as a second sheet, absorbent body, absorbent pad, etc.

[0060] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to these examples. In the following examples, "percent (%)" and "parts" refer to "weight %" and "parts by weight" unless otherwise specified. In the examples and comparative examples, the properties of the water permeability agents were evaluated according to the following methods.

[0061] (Examples 1 to 56 and Comparative Examples 1 to 9) The acid values ​​of the unneutralized products (P-1-1 to P-11-1 and p-1 to p-3) that were reacted were measured, and the amounts of potassium hydroxide for neutralization that would result in the blending components and acid values ​​shown in Tables 1 to 3 and 10 to 11 were calculated. The amount of water that would result in a nonvolatile concentration of 50% by weight after neutralization was calculated and mixed with potassium hydroxide for neutralization to obtain an aqueous potassium hydroxide solution for neutralization. The unneutralized products (P-1-1 to P-11-1 and p-1 to p-3) were then stirred, and the resulting aqueous potassium hydroxide solution for neutralization was added dropwise to obtain partially neutralized products (partially neutralized products of P-1-1 to P-11-1 and p-1 to p-3). The obtained partially neutralized products (partially neutralized products P-1-1 to P-11-1 and p-1 to p-3) were mixed to obtain the formulation components and acid values ​​shown in Tables 1 to 3 and 10 to 11, and water was further added as necessary to prepare the water permeability imparting agents of Examples 1 to 56 and Comparative Examples 1 to 9, each having a nonvolatile content of 50% by weight based on the total weight of the water permeability imparting agent. The components listed in Tables 1 to 3 and 10 to 11 were as shown in Tables 4 to 9 and described below. The obtained water permeability imparting agents were mixtures of alkali metal salts and unneutralized products of the compound represented by general formula (1), the compound represented by general formula (2), the compound represented by general formula (3), the compound represented by general formula (4), and inorganic phosphate (salt). The obtained water permeability imparting agents were each diluted with hot water at 60°C to a concentration of 0.9% by weight of nonvolatile content to obtain diluted solutions. Next, 150 g of each diluted solution of the water-permeability-imparting agent was applied to 300 g of the fiber body by the dip oiling method, so that the amount of non-volatile matter of the water-permeability-imparting agent attached to the fiber was 0.45 wt %. The fiber body was a polypropylene (core)-polyethylene (sheath) composite fiber to which no fiber treatment agent such as a water-permeability-imparting agent had been attached, with a single fiber fineness of 2.2 Dtex and a fiber length of 38 mm. The fiber to which the diluted solution of each water-permeability-imparting agent had been attached was placed in a hot air dryer at 80°C for 2 hours, and then left to dry at room temperature for 8 hours or more to obtain fibers to which the water-permeability-imparting agent had been applied.

[0062] The fibers to which the water permeability agent was added were subjected to a fiber opening process and a carding process using a carding tester, and the fiber weight was 25 g / m ２The resulting web was heat-treated at 140°C in an air-through hot air circulation dryer to fix the web, yielding a nonwoven fabric. The physical properties of the resulting nonwoven fabric were evaluated using the evaluation methods described below. The results are shown in Tables 1 to 3 and 10 to 11.

[0063] [Measurement of P1 ratio [P1 / (P1+P2+P3)] by P nuclear NMR] 150 mg of the nonvolatile content of the water permeability imparting agent was weighed into an NMR sample tube with a diameter of 5 mm, and about 0.5 ml of heavy water (D ２ O) or deuterated chloroform (CDCl ３ ) and dissolve. ３１ Measurements were performed using P-NMR measurement devices (AVANCE400, 162 MHz manufactured by BRUKER and JNM-ECZ400R, 162 MHz manufactured by JEOL Ltd.). Peak areas within the following chemical shift ranges were calculated, and the P1 ratio by P nuclear NMR was calculated as a percentage based on the formula P1 / (P1+P2+P3). P1: Peak area within the range of 0 to 10 ppm P2: Peak area within the range of -25 to -3 ppm P3: Peak area within the range of -3 to 0 ppm

[0064] [Measurement of Dynamic Surface Tension] Each water-permeability imparting agent was diluted with 60°C warm water so that the weight ratio of nonvolatile matter became 1.0 wt%, and the dynamic surface tension of the diluted solution was measured at 25°C and at a bubble generation interval (bubble plate) of 10 to 10,000 msec using a bubble pressure type dynamic surface tensiometer (BP-2, manufactured by KRUSS), and the dynamic surface tension was read at a bubble generation interval (bubble plate) of 1,000 msec.

[0065] (Method for Measuring Acid Value) The acid value (x mgKOH / g) referred to in the present invention was measured by the following method. 1 g of each sample was dissolved in 50 mL of a xylene / ethanol (1 / 1) solution containing 0.01% phenolphthalein, using the non-volatile content of each water-permeability imparting agent. 0.1 mol / L potassium hydroxide ethanol solution was added dropwise to the solution, and the amount of liquid (y mL) required to turn a faint red color was measured, and the acid value was calculated using the following formula: x = y × 5.61

[0066] [Processability (Felt Settling)] Each water-permeability agent was diluted with 60°C warm water to a concentration of 1.0% by weight of nonvolatile matter to obtain a diluted solution. Next, a 2 x 2 cm piece of Olifelt S20 (No. 103) manufactured by Nikke Co., Ltd. was cut and floated in 10 ml of the diluted solution, and the time (seconds) until settling was measured to evaluate uniform adhesion (temperature: 23°C). The shorter the settling time, the easier it is to control the amount of water-permeability agent and treatment agent attached, indicating excellent processability. The number of seconds was evaluated according to the following criteria: 5 is the best rating, and 3 or higher is practical. (Evaluation Criteria) 5... Less than 10 seconds 4... 10 to 50 seconds 3... 50 to 100 seconds 2... 100 to 200 seconds 1... 200 seconds or more

[0067] [Foam suppression] This was performed based on the Ross Miles test method of JIS K3362. Specifically, each water permeability imparting agent was diluted with 60°C hot water to a concentration of 1.0% by weight of nonvolatile matter, and 200 ml of the diluted solution was dripped onto 50 ml of the diluted solution from 900 mm above for 30 seconds in a 50°C environment. The foam volume was measured 5 minutes after the dripping was completed. The lower the foaming power, the better the foam suppression. The foam volume was evaluated according to the following criteria. 5 is the best rating, and 3 or higher is suitable for practical use. (Evaluation criteria) 5...less than 20 mm 4...20 mm or more but less than 80 mm 3...80 mm or more but less than 150 mm 2...150 mm or more but less than 250 mm 1...250 mm or more

[0068] [Instantaneous Water Permeability of Nonwoven Fabric] A nonwoven fabric made using fibers to which a water-permeability agent had been added was placed on filter paper (Toyo Roshi, No. 5), and one drop (approximately 0.05 ml) of artificial urine was dropped from a burette placed 10 mm above the surface of the nonwoven fabric, and the time until the drop disappeared from the surface of the nonwoven fabric was measured. This measurement was carried out at 20 points on the surface of the nonwoven fabric, and the number of drops that disappeared within 5 seconds was displayed. The number of drops was evaluated according to the following criteria. 5 is the best rating, and 3 or more is suitable for practical use. (Evaluation Criteria) 5... 19-20 drops 4... 17-18 drops 3... 14-16 drops 2... 11-13 drops 1... 10 drops or less

[0069] [Repeated Water Permeability of Nonwoven Fabric] According to the EDANA Repeated Liquid Strike-Through Time method, 0.9% saline was permeated into a nonwoven fabric (10 cm x 10 cm) made using fibers to which a water-permeability agent had been added, and the water permeability time was measured. After water permeation, the nonwoven fabric was sandwiched between two sheets of filter paper (Toyo Roshi, No. 5), and a plate (10 cm x 10 cm) and a weight (500 g) were placed on top. The nonwoven fabric was left to dehydrate for 3 minutes, and then air-dried for another 5 minutes. The same procedure was repeated for the nonwoven fabric used in the test. In this repeated test, the shorter the water permeability time, the better. The time (in seconds) was evaluated according to the following criteria. 5 is the best rating, and 3 or higher is suitable for practical use. Furthermore, if the second water permeation is 3 or more, it is suitable for practical use, and if the third water permeation is 3 or more, it is more suitable for practical use. [Evaluation criteria] 5... Less than 2 seconds 4... 2 seconds or more but less than 3 seconds 3... 3 seconds or more but less than 5 seconds 2... 5 seconds or more but less than 10 seconds 1... 10 seconds or more

[0070] The methods for producing the unneutralized products P-1-1 to P-11-1 and p-1 to p-3 used in the Examples and Comparative Examples are shown below. The components obtained by the methods for producing P-1-1 to P-11-1 and p-1 to p-3 are as shown in Tables 4 to 9. (Production method for P-1-1) 385 g of 2-ethylhexyl alcohol was added to a 1000 mL four-neck flask, and while stirring, tetraphosphorus 10 oxide was gradually added to a total amount of 550 g to allow the reaction to proceed, thereby obtaining an unneutralized product. The acid value of the obtained unneutralized product was measured.

[0071] (Method for producing P-1-2) 293 g of 2-ethylhexyl alcohol and 42 g of 75% phosphoric acid were added to a 1000 mL four-neck flask and stirred, and 144 g of tetraphosphorus 10 oxide was gradually added to cause a reaction. 69 g of water was then added and caused a reaction to occur, yielding an unneutralized product. The acid value of the resulting unneutralized product was measured.

[0072] (Method for producing P-1-3) 398 g of 2-ethylhexyl alcohol was added to a 1000 mL four-neck flask, and while stirring, tetraphosphorus 10 oxide was gradually added to a total amount of 550 g to cause a reaction, thereby obtaining an unneutralized product. The acid value of the obtained unneutralized product was measured.

[0073] (Method for producing P-1-4) 369 g of 2-ethylhexyl alcohol was added to a 1000 mL four-neck flask, and while stirring, tetraphosphorus 10 oxide was gradually added to a total amount of 550 g to allow the reaction to proceed, yielding an unneutralized product. The acid value of the resulting unneutralized product was measured. (Method for producing P-1-5) 385 g of 2-ethylhexyl alcohol was added to a 1000 mL four-neck flask, and while stirring, tetraphosphorus 10 oxide was gradually added to a total amount of 550 g to allow the reaction to proceed. 29 g of water was added, and the reaction was further allowed to proceed, yielding an unneutralized product. The acid value of the resulting unneutralized product was measured.

[0074] (Method for producing P-1-6, P-1-7 and P-1-8) Mono 2-ethylhexyl phosphate, di 2-ethylhexyl phosphate, pyro 2-ethylhexyl phosphate, tri 2-ethylhexyl phosphate and inorganic phosphoric acid were mixed in the ratios shown in Tables 4 and 5, respectively, to produce P-1-6, P-1-7 and P-1-8.

[0075] (Production method of P-2-1) Using 492 g of 2-ethylhexyl alcohol with 8 moles of polyoxyethylene added, P-2-1 was produced in the same manner as (P-1-1). (Production method of P-2-2) Using 499 g of 2-ethylhexyl alcohol with 8 moles of polyoxyethylene added, P-2-2 was produced in the same manner as (P-1-1).

[0076] (Production Method of P-3-1) P-3-1 was produced in the same manner as in (P-1-1) using 421 g of isolauryl alcohol.

[0077] (Production Method of P-4-1) P-4-1 was produced in the same manner as in (P-1-1) using 502 g of isolauryl alcohol to which 9 mol of polyoxyethylene had been added.

[0078] (Production Method of P-5-1) P-5-1 was produced in the same manner as in (P-1-1) using 455 g of isostearyl alcohol.

[0079] (Production method for P-6-1) 520 g of polyoxyethylene-15 mol-added isostearyl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-7-1) 405 g of isodecyl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-8-1) 470 g of polyoxyethylene-3 mol-added isolauryl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-9-1) 485 g of polyoxyethylene-5 mol-added isolauryl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-10-1) 495 g of polyoxyethylene-7 mol-added isolauryl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-11-1) 445 g of isocetyl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method for P-1) 385 g of octyl alcohol was used, and production was carried out in the same manner as (P-1-1). (Production method of p-2) Production was carried out in the same manner as (P-1-1) using 412 g of lauryl alcohol. (Production method of p-3) Production was carried out in the same manner as (P-1-1) using 455 g of stearyl alcohol.

[0080] The ingredients listed in Tables 1 to 3 are as follows: E-1: Polyoxyethylene 20 moles added hydrogenated castor oil ether E-2: PEG (400) oleate E-3: Sorbitan monolaurate E-4: Sorbitan monooleate E-5: Polyoxyalkylene alkyl (carbon number 12, 13) ether (random addition type of polyoxyethylene 6 moles and polyoxypropylene 2 moles) E-6: Polyoxyethylene 25 moles added hydrogenated castor oil ether E-7: Hexaglycerin monostearate F: Ditridecyl sulfosuccinic acid sodium salt G: Stearyl dimethyl ammonium betaine

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[0091]

[0092] As can be seen from Tables 1 and 2 and Tables 10 and 11, the water permeability imparting agents of Examples 1 to 56 contain a compound (A) represented by the following general formula (1) and a compound (B) represented by the following general formula (2), and contain at least one selected from a compound (C) represented by the following general formula (3), a compound (D) represented by the following general formula (4), and an inorganic phosphoric acid (salt) (IN). The acid value of the non-volatile content of the water permeability imparting agent is 0.5 to 450 mg KOH / g, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in the spectrum measured by P nuclear NMR is 40 to 100%, thereby solving the problem of the present application. In addition, the water permeability imparting agents of Examples 1 to 56 were evaluated in the same manner as in Examples 1 to 56, except that the amount of nonvolatile matter attached to the water permeability imparting agent was 0.03 wt %. All of the results showed instantaneous water permeability of 5, repeated water permeability (two times permeation) of 3 or more, felt settling of 3 or more, and foam suppression of 3 or more. The above evaluation was on a 5-point scale, with 5 being the best rating and 3 or more being suitable for practical use. Furthermore, it was confirmed that diapers and sanitary products using the nonwoven fabrics produced in Examples 1 to 56 as topsheets also exhibited excellent water permeability. Furthermore, when a web was produced from polyolefin fibers obtained using the water permeability imparting agents used in Examples 1 to 56 and nonwoven fabrics were produced using the spunlace method, a foam shedding test confirmed that excellent foam suppression was achieved, enabling the production of fibers of stable quality. The foam shedding test involved placing raw cotton to which the treatment agent had been applied in water, squeezing the extracted liquid, and measuring the foam height when the liquid was shaken. As described above, it was confirmed that the water permeability imparting agents of Examples 1 to 56 were useful as treatment agents for producing air-through nonwoven fabrics and spunlace nonwoven fabrics.

[0093] On the other hand, as can be seen from Table 3, when compound (A) and compound (B) were not contained (Comparative Examples 1 to 3, 8, and 9), when the acid value of the non-volatile content of the water-permeability-imparting agent was not 0.5 to 450 mgKOH / g (Comparative Examples 4 and 5), when P1 / (P1+P2+P3) was not 40 to 100% (Comparative Example 6), and when compound (C), compound (D), and inorganic phosphoric acid (salt) (IN) were not contained (Comparative Example 7), the problem of foam suppression, which is the object of the present application, was not achieved.

[0094] The fibers and nonwoven fabrics treated with the water-permeability imparting agent of the first embodiment and the treating agent for nonwoven fabric production of the second embodiment are used for top sheets of absorbent articles such as sanitary products, typically disposable diapers and napkins, etc. They can also be used in situations requiring water-permeable sheets in food applications, medical applications, and industrial applications.

Claims

1. A water-permeability imparting agent comprising a compound (A) represented by the following general formula (1) and a compound (B) represented by the following general formula (2), and at least one selected from a compound (C) represented by the following general formula (3), a compound (D) represented by the following general formula (4), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the non-volatile content of the water-permeability imparting agent is 0.5 to 450 mg KOH / g, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in a spectrum measured by P-nuclear NMR of the non-volatile content of the water-permeability imparting agent [P1 / (P1+P2+P3)] is 40 to 100%. P1: peak area in the range of 0 to 10 ppm P2: peak area in the range of -25 to -3 ppm P3: peak area in the range of -3 to 0 ppm (In the formula, R １ is a branched hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M. ２ are each independently a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine, or a quaternary ammonium. (In the formula, R ２ and R ３ are each independently a hydrocarbon group having 6 to 22 carbon atoms; R ２ and R ３ At least one of the groups selected from the group consisting of AO and m is a branched group. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ is a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine or a quaternary ammonium. ｍ When there are two, they may be the same or different.) (In the formula, R ４ is a hydrocarbon group having 6 to 22 carbon atoms; AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. １ and M. ２ are each independently a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine or a quaternary ammonium. ２ Or - (AO) ｍ R ５ It is. ５ is a hydrocarbon group having 6 to 22 carbon atoms. Y is 1 or 2. ２ Or (AO) ｍ When there are two or more, they may be the same or different. ２ If R ４ has a branch, and Q is -(AO) ｍ R ５ If R ４ and R ５ At least one selected from has a branch. (In the formula, R ６ , R ７ and R ８ are each independently a hydrocarbon group having 6 to 22 carbon atoms; R ６ , R ７ and R ８ At least one of the groups selected from the group consisting of (AO) and (AO) has a branch. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. ｍ When there are two or more, they may be the same or different.) 2. The water permeability imparting agent according to claim 1, which has a dynamic surface tension of 25 to 60 mN / m at a life time of 1000 ms when dispersed in water with a non-volatile content of 1%.

3. The water permeability imparting agent according to claim 1 or 2, wherein said compound (A) comprises a compound in said general formula (1) where m is an integer from 1 to 16, said compound (B) comprises a compound in said general formula (2) where at least one of said ms is an integer from 1 to 16, said compound (C) comprises a compound in said general formula (3) where at least one of said ms is an integer from 1 to 16, and said compound (D) comprises a compound in said general formula (4) where at least one of said ms is an integer from 1 to 16.

4. The compound (A) is represented by the general formula (1) R １ The compound (B) includes a compound having 8 to 16 carbon atoms, ２ and R ３ each independently having 8 to 16 carbon atoms, and the compound (C) is ４ and R ５ each independently having 8 to 16 carbon atoms, and the compound (D) is ６ , R ７ and R ８ The water permeability imparting agent according to any one of claims 1 to 3, comprising a compound in which each of the following independently has 8 to 16 carbon atoms.

5. The water permeability imparting agent according to any one of claims 1 to 4, wherein the total ratio of the compound (A), the compound (B), the compound (C), the compound (D) and the inorganic phosphate (salt) (IN) to the non-volatile content of the water permeability imparting agent is 5 to 95% by weight.

6. The water permeability imparting agent according to any one of claims 1 to 5, further comprising a nonionic surfactant (E).

7. A fiber to which the water permeability imparting agent according to any one of claims 1 to 6 has been imparted.

8. A nonwoven fabric to which the water permeability imparting agent according to any one of claims 1 to 6 has been imparted.

9. A water-absorbent article comprising the nonwoven fabric according to claim 8.

10. A method for producing fibers, comprising the step of imparting the water permeability imparting agent according to any one of claims 1 to 6 to raw fibers.

11. A treatment agent for nonwoven fabric production, comprising a compound (A) represented by the following general formula (1) and a compound (B) represented by the following general formula (2), and at least one selected from a compound (C) represented by the following general formula (3), a compound (D) represented by the following general formula (4), and an inorganic phosphoric acid (salt) (IN), wherein the acid value of the nonvolatile content of the treatment agent for nonwoven fabric production is 0.5 to 450 mg KOH / g, and the ratio of P1 to the sum (P1+P2+P3) of the following peak areas P1 to P3 in a spectrum measured by P nuclear NMR of the nonvolatile content of the treatment agent for nonwoven fabric production [P1 / (P1+P2+P3)] is 40 to 100%. P1: peak area within the range of 0 to 10 ppm P2: peak area within the range of -25 to -3 ppm P3: peak area within the range of -3 to 0 ppm (In the formula, R １ is a branched hydrocarbon group having 6 to 22 carbon atoms. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ and M. ２ are each independently a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine, or a quaternary ammonium. (In the formula, R ２ and R ３ are each independently a hydrocarbon group having 6 to 22 carbon atoms; R ２ and R ３ At least one of the groups selected from the group consisting of AO and m is a branched group. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. M １ is a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine or a quaternary ammonium. ｍ When there are two, they may be the same or different.) (In the formula, R ４ is a hydrocarbon group having 6 to 22 carbon atoms; AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. １ and M. ２ are each independently a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine or a quaternary ammonium. ２ Or - (AO) ｍ R ５ It is. ５ is a hydrocarbon group having 6 to 22 carbon atoms. Y is 1 or 2. ２ Or (AO) ｍ When there are two or more, they may be the same or different. ２ If R ４ has a branch, and Q is -(AO) ｍ R ５ If R ４ and R ５ At least one selected from has a branch. (In the formula, R ６ , R ７ and R ８ are each independently a hydrocarbon group having 6 to 22 carbon atoms; R ６ , R ７ and R ８ At least one of the groups selected from the group consisting of (AO) and (AO) has a branch. AO is an oxyalkylene group having 2 to 4 carbon atoms, and m is an integer of 0 to 20. ｍ When there are two or more, they may be the same or different.) 12. Fiber to which the treatment agent for nonwoven fabric production according to claim 11 has been applied.

13. A nonwoven fabric to which the treatment agent for nonwoven fabric production according to claim 11 has been applied.

14. A water-absorbent article comprising the nonwoven fabric according to claim 13.

15. A method for producing fibers, comprising the step of applying the treatment agent for producing nonwoven fabric according to claim 11 to raw fibers.

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