Treatment agent for regenerated cellulose fibers, multi-component first treatment agent for regenerated cellulose fibers, multi-component second treatment agent for regenerated cellulose fibers, and their use

Abstract

An object of the present invention is to provide a treatment agent for regenerated cellulose fibers that is excellent in suppressing neps. The treatment agent for regenerated cellulose fibers of the present invention contains an organic phosphate ester compound (A) having a hydrocarbon group having 14 to 22 carbon atoms, including a compound (A1) represented by the following general formula (1) and a compound (A2) represented by the following general formula (2), and a nonionic surfactant (B), wherein the weight ratio (A / B) of the compound (A) to the surfactant (B) is 0.05 to 1.0. TIFF0007823283000020.tif3250 (In formula (1), R1 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. M1 and M2 are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium.) TIFF0007823283000021.tif3050 (In formula (2), R2 and R3 each independently represent a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. M1 represents a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium.)

Description

[Technical Field]

[0001] The present invention relates to a treatment agent for regenerated cellulose fibers and its use. [Background technology]

[0002] Regenerated cellulose fibers are attracting attention from the perspectives of environmental conservation and sustainability because they are highly biodegradable and are made from plant-derived resources such as pulp and cotton linters. To improve the processability of regenerated cellulose fibers in spinning and nonwoven fabric processing, a treatment agent for regenerated cellulose fibers is sometimes applied. Conventionally, treatment agents for regenerated cellulose fibers have been proposed, including those containing triglyceride sulfate as the main component (Patent Document 1) and those containing polyhydric alcohols, fatty acids, and nonionic surfactants as the main components (Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2015-206128 [Patent Document 2] Japanese Patent Publication No. 2020-2497 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the spun yarn and nonwoven fabric manufacturing processes, which have recently been required to be faster, these conventional treatment agents have the problem that they cause defects such as knots and neps due to insufficient fiber opening, making it difficult to achieve sufficient uniformity and resulting in a decrease in the quality of the spun yarn and nonwoven fabric. Therefore, the object of the present invention is to provide a treatment agent for regenerated cellulose fibers that has excellent nep suppression properties, a multi-component first treatment agent for regenerated cellulose fibers that can be used as the treatment agent, a multi-component second treatment agent for regenerated cellulose fibers that can be used as the treatment agent, regenerated cellulose fibers to which the treatment agent has been attached, and spun yarns containing the fibers. [Means for solving the problem]

[0005] As a result of intensive research into solving the above-mentioned problems, the present inventors have discovered that the problem can be solved by using a treatment agent for regenerated cellulose fibers containing a specific organic phosphate ester compound (A) and a nonionic surfactant (B) in a specific weight ratio.

[0006] That is, the water permeability imparting agent of the present invention includes the following aspects. <1> A treatment agent for regenerated cellulose fibers, comprising the following organic phosphate ester compound (A) and nonionic surfactant (B), wherein the weight ratio (A / B) of the compound (A) to the surfactant (B) is 0.05 to 1.0. Organic phosphate ester compound (A): Organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms, including compound (A1) represented by the following general formula (1) and compound (A2) represented by the following general formula (2): [ka] (In formula (1), R 1 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. 1 and M 2 are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. [ka] (In formula (2), R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. 1is a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. <2> the compound (A) optionally contains a compound (A3) represented by the following general formula (3), and the weight ratio of the compound (A1) to the total of the compound (A1), the compound (A2), and the compound (A3) (A1 / (A1+A2+A3)) is 0.01 to 0.6; <1> The treating agent for regenerated cellulose fibers according to claim 1. [ka] (In formula (3), R 4 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. 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 R 5 R 5 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. Y is 1 or 2. M 2 If there are two or more, they may be the same or different.) <3> The compound (A) includes a compound (A3) represented by the general formula (3). <2> The treating agent for regenerated cellulose fibers according to claim 1. <4> The compound (A) is 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms; and 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, <1> ~ <3> The treating agent for regenerated cellulose fibers according to any one of the preceding claims. <5> The acid value of the nonvolatile content of the treatment agent for regenerated cellulose fibers is 0.1 to 70 mgKOH / g. <1> ~ <4> The treating agent for regenerated cellulose fibers according to any one of the preceding claims. <6> The nonionic surfactant (B) contains at least one selected from the group consisting of a compound represented by the following general formula (4) and a nitrogen-containing nonionic surfactant: <1> ~ <5> The treating agent for regenerated cellulose fibers according to any one of the preceding claims. [ka] (In formula (4), R 6 R is an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. 7 is a hydrogen atom, an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. a and b are each an integer of 0 to 20, and satisfy 3≦a+b≦40. The repeating units (C3H6O) and (C2H4O) may be arranged randomly or may form blocks. <7> For spinning regenerated cellulose, <1> ~ <6> The treating agent for regenerated cellulose fibers according to any one of the preceding claims. <8> A set of treatment agents including a multi-component first treatment agent for regenerated cellulose fibers containing the compound (A) and a multi-component second treatment agent for regenerated cellulose fibers containing the nonionic surfactant (B), <1> ~ <7> The treating agent for regenerated cellulose fibers according to any one of the preceding claims. <9> <1> ~ <7> A multi-component first treatment agent for regenerated cellulose fibers used as a treatment agent for regenerated cellulose fibers described in any one of the above, wherein the treatment agent for regenerated cellulose fibers is a treatment agent for regenerated cellulose fibers composed of a set of multiple treatment agents, and the multi-component first treatment agent for regenerated cellulose fibers contains the compound (A) and is used in combination with a multi-component second treatment agent for regenerated cellulose fibers containing the nonionic surfactant (B). <10> <1> ~ <7> A multi-component second treatment agent for regenerated cellulose fibers used as a treatment agent for regenerated cellulose fibers described in any one of the above, wherein the treatment agent for regenerated cellulose fibers is a treatment agent for regenerated cellulose fibers composed of a set of multiple treatment agents, and the multi-component second treatment agent for regenerated cellulose fibers contains the nonionic surfactant (B) and is used in combination with a multi-component first treatment agent for regenerated cellulose fibers containing the compound (A). <11> <1> ~ <8> 1. A regenerated cellulose fiber to which the treating agent for regenerated cellulose fiber according to any one of claims 1 to 9 has been applied. <12> <11> A spun yarn comprising the regenerated cellulose fiber according to claim 1. [Effects of the Invention]

[0007] The treating agent for regenerated cellulose fibers of the present invention is excellent in nep suppression. The regenerated cellulose fiber of the present invention is provided with a fiber treatment agent having excellent nep suppression properties, and therefore, regenerated cellulose fiber having excellent nep suppression properties and excellent quality can be obtained. The spun yarn of the present invention contains regenerated cellulose fibers to which a fiber treatment agent with excellent nep suppression properties has been applied, and therefore, a spun yarn of excellent quality can be obtained. [Brief explanation of the drawings]

[0008] [Figure 1] Schematic diagram showing the definition of U% DETAILED DESCRIPTION OF THE INVENTION

[0009] The treating agent for regenerated cellulose fibers of the present invention (hereinafter sometimes simply referred to as the treating agent) contains an organic phosphate ester compound (A) and a nonionic surfactant (B) described below in specific ratios. The details are explained below.

[0010] [Organophosphate ester compound (A)] The organic phosphate ester compound (A) (hereinafter sometimes simply referred to as compound (A)) is an organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms, including a compound (A1) represented by the general formula (1) above and a compound (A2) represented by the general formula (2) above.

[0011] [Compound (A1) represented by general formula (1)] The organic phosphate ester compound (A) includes a compound (A1) represented by the above general formula (1) (hereinafter, sometimes simply referred to as compound (A1)). The compound (A1) is not particularly limited as long as it is a compound represented by the general formula (1), and one or more kinds may be used in combination. In general formula (1), R 1 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. In order to achieve excellent fiber openability in the spun yarn production process and the nonwoven fabric production process, the upper limit of the carbon number is preferably 20, more preferably 18, and the lower limit of the carbon number is preferably 15, more preferably 16. Furthermore, for example, 16 to 22 is preferred, and 16 to 18 is more preferred.

[0012] R 1 There are no particular limitations on the group, but examples thereof include an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-icosyl group, an n-docosyl group, an iso-tetradecyl group, an iso-pentadecyl group, an iso-hexadecyl group, an iso-octadecyl group, a 2-hexyldecyl group, and a 2-octyldodecyl group.

[0013] 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 From the viewpoint of emulsion stability and antistatic properties, M is preferably a hydrogen atom, an alkali metal, or an organic amine. 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, and triethylamine. Examples of quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.

[0014] Specific examples of the compound (A1) include, but are not limited to, monotetradecyl phosphate disodium salt, monotetradecyl phosphate dipotassium salt, monohexadecyl phosphate, monohexadecyl phosphate monopotassium salt, monohexadecyl phosphate dipotassium salt, monohexadecyl phosphate bis(triethanolamine) salt, monooctadecyl phosphate, monooctadecyl phosphate monopotassium salt, monooctadecyl phosphate dipotassium salt, monooctadecyl phosphate bis(triethanolamine) salt, Examples include tadecyl phosphate bis(triethanolamine) salt, monoicosyl phosphate, monoicosyl phosphate monopotassium salt, monoicosyl phosphate dipotassium salt, monodocosyl phosphate, monodocosyl phosphate dipotassium salt, mono-iso-hexadecyl phosphate dipotassium salt, mono-iso-octadecyl phosphate dipotassium salt, mono-2-hexyldecyl phosphate dipotassium salt, mono-2-octyldodecyl phosphate dipotassium salt, etc. Among these, in terms of emulsion stability and fiber-opening ability, monohexadecyl phosphate monopotassium salt, monohexadecyl phosphate dipotassium salt, monooctadecyl phosphate monopotassium salt, monooctadecyl phosphate dipotassium salt, monoicosyl phosphate dipotassium salt, and monoiso-octadecyl phosphate dipotassium salt are preferred.

[0015] [Compound (A2) represented by general formula (2)] The organic phosphate ester compound (A) includes a compound (A2) represented by the above general formula (2) (hereinafter, sometimes simply referred to as compound (A2)). The compound (A2) is not particularly limited as long as it is a compound represented by the above general formula (2), and one or more kinds may be used in combination. In formula (2), R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. In order to achieve excellent fiber openability in the spun yarn production process and the nonwoven fabric production process, the upper limit of the carbon number is preferably 20, more preferably 18, and the lower limit of the carbon number is preferably 15, more preferably 16. Furthermore, for example, 16 to 22 is preferred, and 16 to 18 is more preferred.

[0016] R 2 and R 3 There are no particular limitations on R, and examples thereof include an n-tetradecyl group, an n-pentadecyl group, a hexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-icosyl group, an n-docosyl group, an iso-tetradecyl group, an iso-pentadecyl group, an iso-hexadecyl group, an iso-octadecyl group, a hexyldecyl group, and an octyldodecyl group. 2 and R 3 may be the same or different.

[0017] In formula (2), M 1 is a hydrogen atom, an alkali metal, an ammonium, a phosphonium, an organic amine, or a quaternary ammonium. 1 is preferably an alkali metal or an organic amine in terms of emulsion stability and antistatic properties. 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, and triethylamine. Examples of quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.

[0018] Specific examples of compound (A2) include, but are not limited to, ditetradecyl phosphate sodium salt, ditetradecyl phosphate potassium salt, dihexadecyl phosphate potassium salt, dihexadecyl phosphate triethanolamine salt, dioctadecyl phosphate potassium salt, dioctadecyl phosphate bis(triethanolamine) salt, diicosyl phosphate potassium salt, didocosyl phosphate potassium salt, di-iso-hexadecyl phosphate potassium salt, di-iso-octadecyl phosphate potassium salt, di-2-hexyldecyl phosphate potassium salt, di-2-octyldodecyl phosphate potassium salt, etc. Among these, dihexadecyl phosphate potassium salt, dioctadecyl phosphate potassium salt, diicosyl phosphate potassium salt, and di-iso-octadecyl phosphate potassium salt are preferred in terms of emulsion stability and fiber-opening ability.

[0019] [Compound (A3) represented by general formula (3)] The organic phosphate ester compound (A) may contain a compound (A3) represented by the above general formula (3) (hereinafter, sometimes simply referred to as compound (A3)), and it is preferable that the organic phosphate ester compound (A) contains compound (A3) from the viewpoint of the stability of the treatment agent. The compound (A3) is not particularly limited as long as it is a compound represented by the above general formula (3), and one or more kinds may be used in combination. In formula (3), R 4 and R 5 are each independently a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. In order to achieve excellent fiber openability in the spun yarn production process and the nonwoven fabric production process, the upper limit of the carbon number is preferably 20, more preferably 18, and the lower limit of the carbon number is preferably 15, more preferably 16. Furthermore, for example, 16 to 22 is preferred, and 16 to 18 is more preferred. R 4 and R 5There are no particular limitations on the group, but examples thereof include an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-icosyl group, an n-docosyl group, an iso-tetradecyl group, an iso-pentadecyl group, an iso-hexadecyl group, an iso-octadecyl group, a 2-hexyldecyl group, and a 2-octyldodecyl group. R 4 and R 5 may be the same or different.

[0020] 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 From the viewpoint of emulsion stability and antistatic properties, M is preferably a hydrogen atom, an alkali metal, or an organic amine. 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, and triethylamine. Examples of quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.

[0021] Q is M 2 or R 5 is. Y is 1 or 2. M in the molecule 2 When there are two or more, they may be the same or different.

[0022] Specific examples of the compound (A3) include, but are not limited to, monotetradecyl pyrophosphate disodium salt, monotetradecyl pyrophosphate trisodium salt, monotetradecyl pyrophosphate monopotassium salt, monotetradecyl pyrophosphate dipotassium salt, monotetradecyl pyrophosphate tripotassium salt, ditetradecyl pyrophosphate monopotassium salt, ditetradecyl pyrophosphate dipotassium salt, monohexadecyl pyrophosphate monopotassium salt, monohexadecyl pyrophosphate dipotassium salt, monohexadecyl pyrophosphate Phosphate tripotassium salt, dihexadecyl pyrophosphate monopotassium salt, dihexadecyl pyrophosphate dipotassium salt, monohexadecyl pyrophosphate bis(triethanolamine) salt, monohexadecyl pyrophosphate tris(triethanolamine) salt, monohexadecyl tripolyphosphate dipotassium salt, monohexadecyl tripolyphosphate tripotassium salt, dihexadecyl tripolyphosphate dipotassium salt, monooctadecyl pyrophosphate monopotassium salt, monooctadecyl pyrophosphate dipotassium salt, monooctadecyl pyrophosphate Octadecyl pyrophosphate tripotassium salt, dioctadecyl pyrophosphate monopotassium salt, dioctadecyl pyrophosphate dipotassium salt, monooctadecyl pyrophosphate bis(triethanolamine) salt, monooctadecyl pyrophosphate tris(triethanolamine) salt, monooctadecyl tripolyphosphate dipotassium salt, monooctadecyl tripolyphosphate tripotassium salt, dioctadecyl tripolyphosphate dipotassium salt, monoicosyl pyrophosphate dipotassium salt, monoicosyl pyrophosphate tripotassium salt , diicosyl pyrophosphate dipotassium salt, monodocosyl pyrophosphate dipotassium salt, monodocosyl pyrophosphate tripotassium salt, didocosyl pyrophosphate dipotassium salt, mono-iso-octadecyl pyrophosphate dipotassium salt, mono-iso-octadecyl pyrophosphate tripotassium salt, di-iso-octadecyl pyrophosphate dipotassium salt, mono-2-hexyldecyl pyrophosphate dipotassium salt, di-2-hexyldecyl pyrophosphate dipotassium salt, mono-2-octyldodecyl pyrophosphate dipotassium salt,Among them, in terms of emulsion stability and fiber opening properties, monohexadecyl pyrophosphate monopotassium salt, monohexadecyl pyrophosphate dipotassium salt, monohexadecyl pyrophosphate tripotassium salt, dihexadecyl pyrophosphate dipotassium salt, monooctadecyl pyrophosphate monopotassium salt, monooctadecyl pyrophosphate dipotassium salt, monooctadecyl pyrophosphate tripotassium salt, dioctadecyl pyrophosphate dipotassium salt, mono Neucosil pyrophosphate dipotassium salt, monoicosyl pyrophosphate tripotassium salt, monodocosyl pyrophosphate dipotassium salt, monodocosyl pyrophosphate tripotassium salt, mono-iso-octadecyl pyrophosphate monopotassium salt, mono-iso-octadecyl pyrophosphate dipotassium salt, mono-iso-octadecyl pyrophosphate tripotassium salt, and di-iso-octadecyl pyrophosphate dipotassium salt are preferred.

[0023] [Organophosphate ester compounds having a hydrocarbon group having 14 to 22 carbon atoms other than compounds (A1), (A2) and (A3)] The compound (A) may contain an organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms other than the compounds (A1), (A2) and (A3). The organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms other than the compound (A1), the compound (A2), and the compound (A3) is not particularly limited, and examples thereof include monotetradecenyl phosphate monopotassium salt, monotetradecenyl phosphate dipotassium salt, ditetradecenyl phosphate potassium salt, monotetradecenyl pyrophosphate dipotassium salt, monohexadecenyl phosphate monopotassium salt, monohexadecenyl phosphate dipotassium salt, dihexadecenyl phosphate potassium salt, monohexadecenyl pyrophosphate dipotassium salt, monooctadecenyl phosphate monopotassium salt, monooctadecenyl phosphate dipotassium salt, dioctadecenyl phosphate potassium salt, monooctadecenyl pyrophosphate dipotassium salt, monooctadecenyl phosphate disodium salt, monooctadecenyl phosphate Examples of such phosphates include bis(triethanolamine) salt, monoicosenyl phosphate monopotassium salt, monoicosenyl phosphate dipotassium salt, diicosenyl phosphate potassium salt, monodocosenyl phosphate monopotassium salt, monodocosenyl phosphate dipotassium salt, didocosenyl phosphate potassium salt, monooctadecadienyl phosphate monopotassium salt, monooctadecadienyl phosphate dipotassium salt, dioctadecadienyl phosphate potassium salt, monononylphenyl phosphate dipotassium salt, dinonylphenyl phosphate potassium salt, tritetradecyl phosphate, trihexadecyl phosphate, trioctadecyl phosphate, triicosyl phosphate, tridocosyl phosphate, tri-isooctadecyl phosphate, trihexyldecyl phosphate, and trioctadecenyl phosphate.

[0024] [Nonionic surfactant (B)] The treating agent for regenerated cellulose fibers of the present invention contains a nonionic surfactant (B). The nonionic surfactant (B) is not particularly limited, but from the viewpoint of imparting the fiber bundling ability required in the spun yarn production process and the nonwoven fabric production process, it preferably contains at least one selected from the compound represented by the above general formula (4) and a nitrogen-containing nonionic surfactant, and more preferably contains the compound represented by the above general formula (4).

[0025] The compound represented by the general formula (4) is not particularly limited, and one or more kinds may be used in combination. In formula (4), R 6 is an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. R 6 Although there are no particular limitations on the group, from the viewpoint of imparting the fiber bundling properties required in the spun yarn production process and the nonwoven fabric production process, an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms is preferred, an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms is more preferred, and an alkyl group having 8 to 22 carbon atoms is even more preferred. From the viewpoint of fiber bundling, R 6 The upper limit of the number of carbon atoms is preferably 20, more preferably 18, and the lower limit of the number of carbon atoms is preferably 10, more preferably 12. For example, 10 to 20 is preferred, and 12 to 18 is more preferred.

[0026] R 6There are no particular limitations on the alkyl group, and examples thereof include straight-chain alkyl groups such as n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-octadecyl, n-icosyl, and n-docosyl groups; iso-undecyl, iso-tridecyl, iso-tetradecyl, iso-pentadecyl, iso-hexadecyl, iso-octadecyl, 2-ethylhexyl, 2-propylheptyl, 3-propylheptyl, 2-butyloctyl, 4-butyloctyl, 2-hexyloctyl, and 2-hexyldecyl groups. branched alkyl groups such as octenyl, decenyl, dodecenyl, octadecenyl, hexadecenyl, octadecenyl, icosenyl, and docosenyl; alkenyl groups such as octanoyl, decanoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, icosanoyl, and docosanoyl; alkanoyl groups such as octenoyl, decenoyl, dodecenoyl, octadecenoyl, hexadecenyl, octadecanoyl, icosanoyl, and docosanoyl; and alkenoyl groups such as octenoyl, decenoyl, dodecenoyl, octadecenoyl, hexadecenyl, octadecenoyl, icosenoyl, and docosenoyl.

[0027] In formula (4), R 7 is a hydrogen atom, an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. R 7 Although there are no particular limitations on the group, from the viewpoint of fiber bundling, a hydrogen atom, an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms is preferred, an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms is more preferred, and an alkyl group having 8 to 22 carbon atoms is even more preferred. R 7 When is other than a hydrogen atom, from the viewpoint of fiber bundling, R 7 The upper limit of the number of carbon atoms is preferably 20, more preferably 18, and the lower limit of the number of carbon atoms is preferably 10, more preferably 12. For example, 10 to 20 is preferred, and 12 to 18 is more preferred.

[0028] R 7 is not particularly limited, and examples thereof include a hydrogen atom; a straight-chain alkyl group such as an n-octyl group, an n-nonyl group, an n-decyl group, an n-undecyl group, an n-dodecyl group, an n-tridecyl group, an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, an n-octadecyl group, an n-icosyl group, or an n-docosyl group; an iso-undecyl group, an iso-tridecyl group, an iso-tetradecyl group, an iso-pentadecyl group, an iso-hexadecyl group, an iso-octadecyl group, a 2-ethylhexyl group, a 2-propylheptyl group, a 3-propylheptyl group, a 2-butyloctyl group, a 4-butyloctyl group, a 2-hexyloctyl group, a 2-hexyl branched alkyl groups such as dodecyl, 2-octyldodecyl, and 3,5,5-trimethylhexyl; alkenyl groups such as octenyl, decenyl, dodecenyl, octadecenyl, hexadecenyl, octadecenyl, icosenyl, and docosenyl; alkanoyl groups such as octanoyl, decanoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, icosanoyl, and docosanoyl; and alkenoyl groups such as octenoyl, decenoyl, dodecenoyl, octadecenoyl, hexadecenyl, octadecenoyl, icosenoyl, and docosenoyl.

[0029] In formula (4), a and b are each an integer of 0 to 20, and satisfy the relationship 3≦a+b≦40. From the viewpoint of imparting the fiber bundling ability required in the spun yarn production process and the nonwoven fabric production process, the upper limit of a is preferably 18, more preferably 15, and even more preferably 10. From the viewpoint of fiber bundling ability, the upper limit of b is preferably 18, more preferably 15. On the other hand, the lower limit of b is preferably 3, more preferably 5. Furthermore, for example, 3 to 18 is preferable, and 5 to 15 is more preferable. From the viewpoint of fiber bundling ability, the upper limit of a+b is preferably 35, more preferably 30, and even more preferably 20. On the other hand, the lower limit of b is preferably 4, and more preferably 5. Furthermore, for example, 4≦a+b≦30 is preferable, and 5≦a+b≦20 is more preferable. From the viewpoint of fiber bundling property, a ≦ b is preferable, and a < b is more preferable. In formula (4), the repeating units (C3H6O) and (C2H4O) may be arranged randomly or form blocks.

[0030] The compound represented by general formula (4) is not particularly limited, and examples thereof include polyoxyalkylene aliphatic alcohol ethers and polyoxyalkylene fatty acid esters.

[0031] The polyoxyalkylene aliphatic alcohol ether is not particularly limited, but may be EO(3)-octyl ether, EO(5)-decyl ether, EO(5)-dodecyl ether, EO(15)-dodecyl ether, EO(7)-tetradecyl ether, EO(8)-hexadecyl ether, EO(10)-octadecyl ether, EO(10)-octadecenyl ether, EO(20)-octadecenyl ether, EO(12)-icosyl ether, E O(15)-docosyl ether, EO(5)-iso-dodecyl ether, EO(10)-iso-octadecyl ether, EO(4)-2-ethylhexyl ether, EO(5)-2-butyloctyl ether, EO(8)-2-hexyldecyl ether, PO(10)-dodecyl ether, PO(5)-2-ethylhexyl ether, PO(1) / EO(4)-octyl ether, PO(10) / EO(20)-octyl ether, PO(2 / EO(5)decyl ether, PO(3) / EO(5)-dodecyl ether, PO(7) / EO(3)-dodecyl ether, PO(4) / EO(7)-tridecyl ether, PO(4) / EO(8)-tetradecyl ether, PO(5) / EO(8)-hexadecyl ether, PO(5) / EO(10)-octadecyl ether, PO(15) / EO(15)-octadecyl ether, PO(10) / EO(10)-octadecenyl ether, PO(2 / EO(6)-iso-dodecyl Examples include ethylene oxide, PO (2) / EO (6)-iso-tridecyl ether, PO (4) / EO (8)-iso-hexadecyl ether, PO (5) / EO (15)-iso-octadecyl ether, PO (3) / EO (3)-2-ethylhexyl ether, PO (2) / EO (6)-2-butyloctyl ether, PO (1) / EO (6)-3,5,5-trimethylhexyl ether, PO (15) / EO (10)-di-2-ethylhexyl ether, etc. EO stands for ethylene oxide, PO stands for propylene oxide, and the numbers in parentheses represent the number of moles of each alkylene oxide added.For example, EO(5) means the addition of 5 moles of ethylene oxide, and PO(1) / EO(4) means the addition of 1 mole of propylene oxide and 4 moles of ethylene oxide.

[0032] The polyoxyalkylene fatty acid ester means an ester having a structure in which a hydroxyl group of a polyalkylene glycol and a monovalent fatty acid are esterified. The polyoxyalkylene fatty acid ester is not particularly limited, but examples thereof include polyoxyethylene (3 to 40 mol) laurate, polyoxyethylene (3 to 40 mol) dilaurate, polyoxyethylene (3 to 40 mol) palmitate, polyoxyethylene (3 to 40 mol) dipalmitate, polyoxyethylene (3 to 40 mol) stearate, polyoxyethylene (3 to 40 mol) distearate, polyoxyethylene (3 to 40 mol) oleate, polyoxyethylene (3 to 40 mol) dioleate, polyoxyethylene (3 to 40 mol) itaconate, polyoxyethylene (3 to 40 mol) behenate, polyoxypropylene (3 to 40 mol) laurate, and PO(10) / EO(20)-oleate.

[0033] The nitrogen-containing nonionic surfactant is not particularly limited as long as it is a nonionic surfactant having a nitrogen atom, but examples include those having a structure in which a total of 2 to 100 moles of alkylene oxide having 2 or more and 3 or less carbon atoms are added to 1 mole of organic amine. The organic amine is not particularly limited, but examples include organic amines having a monovalent hydrocarbon group with 8 to 22 carbon atoms. From the viewpoint of imparting the fiber bundling properties required in the spun yarn production process and the nonwoven fabric production process, the upper limit of the carbon number is preferably 20, more preferably 18. On the other hand, the lower limit of the carbon number is preferably 10, more preferably 12. Furthermore, for example, 10 to 20 is preferred, and 12 to 18 is more preferred. The hydrocarbon group contained in the organic amine may be a saturated hydrocarbon group, an unsaturated hydrocarbon group, a straight-chain hydrocarbon group, or a branched-chain hydrocarbon group. The alkylene oxide having 2 or more and 3 or less carbon atoms is preferably at least one selected from ethylene oxide and propylene oxide. From the viewpoint of fiber bundling ability, the upper limit of the number of moles of alkylene oxide added is preferably 50 moles, more preferably 30 moles, and even more preferably 20 moles. On the other hand, the lower limit of the number of moles is preferably 3 moles, more preferably 4 moles, and even more preferably 5 moles. Also, for example, 3 to 50 moles is preferable, and 5 to 20 moles is more preferable.

[0034] The linear saturated hydrocarbon group is not particularly limited, but examples thereof include an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, an icosyl group, and a docosyl group.

[0035] Examples of saturated hydrocarbon groups having a branched chain structure include an iso-octyl group, an iso-nonyl group, an iso-decyl group, an iso-undecyl group, an iso-dodecyl group, an iso-tridecyl group, an iso-tetradecyl group, an iso-hexadecyl group, an iso-octadecyl group, an iso-icosyl group, an iso-docosyl group, a 2-ethylhexyl group, a 2-butyloctyl group, a 2-hexyldecyl group, and a 2-octyldodecyl group.

[0036] The unsaturated hydrocarbon group may be an alkenyl group having one double bond as an unsaturated carbon bond, or an alkadienyl group or alkatrienyl group having two or more double bonds. Furthermore, the unsaturated hydrocarbon group may be an alkynyl group having one triple bond as an unsaturated carbon bond, or an alkadiynyl group having two or more triple bonds. Specific examples of linear unsaturated hydrocarbon groups having one double bond in the hydrocarbon group include octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, icosenyl, and docosenyl.

[0037] Specific examples of unsaturated hydrocarbon groups having a branched chain structure and one double bond in the hydrocarbon group include iso-octenyl, iso-nonenyl, iso-decenyl, iso-undecenyl, iso-dodecenyl, iso-tridecenyl, iso-tetradecenyl, iso-hexadecenyl, iso-octadecenyl, iso-icosenyl, and iso-docosenyl groups.

[0038] Specific examples of organic amines include octylamine, nonylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, icosylamine, docosylamine, decenylamine, dodecenylamine, tetradecenylamine, hexadecenylamine, octadecenylamine, iso-octylamine, iso-tridecylamine, iso-octadecylamine, 2-ethylhexylamine, and 2-octyldodecylamine.

[0039] The nonionic surfactant other than the compound represented by general formula (4) and the nitrogen-containing nonionic surfactant is not particularly limited, but preferred examples include an ester 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 (hereinafter simply referred to as an ester compound having one or more hydroxyl groups in the molecule), a polyoxyalkylene sorbitan fatty acid ester, a polyoxyalkylene castor oil ether, a polyoxyalkylene hydrogenated castor oil ether, and a polycarboxylic acid ester.

[0040] An ester compound having one or more hydroxyl groups in the molecule has a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and has one or more hydroxyl groups in the molecule.

[0041] The polyhydric alcohol that is a constituent element of the ester compound having one or more hydroxyl groups in the molecule is not particularly limited, but sorbitan and glycerin are preferred in terms of emulsion stability. The fatty acid that is a component of the ester compound having one or more hydroxyl groups in the molecule is not particularly limited, but saturated and / or unsaturated fatty acids having 12 to 18 carbon atoms are preferred in terms of emulsion stability.

[0042] The ester compound having one or more hydroxyl groups in the molecule is not particularly limited, but from the viewpoint of emulsion stability, sorbitan monoester, sorbitan diester, sorbitan triester, glycerin monoester, and glycerin diester are preferred, and sorbitan monoester is 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.

[0043] Polyoxyalkylene sorbitan fatty acid esters are compounds having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to a sorbitan fatty acid monoester, a sorbitan fatty acid diester, or a sorbitan fatty acid triester. The polyoxyalkylene sorbitan fatty acid ester is not particularly limited, but examples thereof include polyoxyethylene (1 to 25 mol) sorbitan monostearate, polyoxyethylene (1 to 25 mol) sorbitan monooleate, polyoxyethylene (1 to 25 mol) sorbitan monopalmitate, polyoxyethylene (1 to 25 mol) sorbitan monolaurate, polyoxyethylene (1 to 25 mol) sorbitan distearate, polyoxyethylene (1 to 25 mol) sorbitan dioleate, polyoxyethylene (1 to 25 mol) sorbitan dipalmitate, polyoxyethylene (1 to 25 mol) sorbitan dilaurate, polyoxyethylene (1 to 25 mol) sorbitan tristearate, polyoxyethylene (1 to 25 mol) sorbitan trioleate, sorbitan tripalmitate, and polyoxyethylene (1 to 25 mol) sorbitan trilaurate.

[0044] Polyoxyalkylene castor oil ether 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 is not particularly limited, but examples thereof include polyoxyethylene castor oil ether (polyoxyethylene (1 to 25 moles) castor oil ether).

[0045] Polyoxyalkylene hydrogenated castor oil ether 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 is not particularly limited, but examples thereof include polyoxyethylene hydrogenated castor oil ether (polyoxyethylene (1 to 25 moles) hydrogenated castor oil ether).

[0046] The polycarboxylic acid ester 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 polycarboxylic acids include sebacic acid, oleic acid dimer, erucic acid dimer, oleic acid trimer, and erucic acid trimer. Of the polycarboxylic acids, dimer acids of unsaturated fatty acids having 18 to 22 carbon atoms are preferred, and dimer acids of unsaturated fatty acids having 18 carbon atoms are more preferred. The polycarboxylic acid may be either an aliphatic polycarboxylic acid or an aromatic polycarboxylic acid, and is preferably an aliphatic polycarboxylic acid. The polyol is a dihydric 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. Examples of the polyol include polyalkylene glycols composed of oxyethylene units and / or oxypropylene units, polyoxyalkylene sorbitan, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene glycerin, polyoxyalkylene polyglycerin, and polyoxyalkylene polyglycerin esters. 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, and polyoxyethylene polyoxypropylene glycol. The polyoxyethylene polyoxypropylene glycol may be a block or random product. Examples of the polyalkylene glycol 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.

[0047] [Inorganic phosphoric acid (salt)] The treating agent for regenerated cellulose fibers of the present invention preferably contains inorganic phosphoric acid (salt) in terms of antistatic properties. The inorganic phosphoric acid (salt) 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, and examples of the trimetal phosphate include tripotassium phosphate and trisodium phosphate.

[0048] [Other ingredients] The treating agent for regenerated cellulose fibers of the present invention may contain, as other components, anionic surfactants, amphoteric surfactants, and modified silicones, from the viewpoint of exerting the effects of the present invention. The anionic surfactant is not particularly limited, 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 synthesis of the polyhydric alcohol fatty acid ester essentially contains an unsaturated fatty acid, and may contain a saturated fatty acid, a hydroxy fatty acid, a hydroxy unsaturated fatty acid, or the like. As the alkyl sulfate salt, a polyhydric alcohol fatty acid ester sulfate salt is preferred. 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, even more preferably 14, and particularly preferably 13. On the other hand, the lower limit of the alkyl group is more preferably 7, even more preferably 8, and particularly preferably 9. For example, 8 to 18 is more preferable, and 10 to 13 is even more preferable.

[0049] [Treatment agent for regenerated cellulose fibers] The regenerated cellulose fiber treatment agent of the present invention contains the above-mentioned organic phosphate ester compound (A) and the above-mentioned nonionic surfactant (B), and the weight ratio (A / B) of the organic phosphate ester compound (A) to the nonionic surfactant (B) is 0.05 to 1.0. The reason why the regenerated cellulose fiber treatment agent of the present invention has excellent nep suppression properties is not particularly limited, but is believed to be due to the fact that the organic phosphate ester compound (A), which has a high melting point, provides excellent fiber opening due to its smoothing effect, while the nonionic surfactant (B) provides adequate fiber bundling properties, thereby suppressing fiber entanglement and promoting the disentanglement of entanglements during processing due to the interaction between fibers, thereby suppressing defects such as bundling and neps. If the proportion of compound (A) is low and the (A / B) ratio is less than 0.05, smoothness is insufficient, entanglement cannot be suppressed, and nep suppression properties are reduced. On the other hand, if the proportion of compound (A) is large and (A / B) exceeds 1.0, the fiber bundling ability will be insufficient, and the resulting entanglements may not be untangled, resulting in a decrease in nep suppression. In addition, the shape stability of the fiber assembly during processing will be insufficient, resulting in a decrease in the uniformity of the spun yarn or nonwoven fabric.

[0050] The acid value of the nonvolatile content of the treatment agent of the present invention is preferably 0.1 to 70 mgKOH / g in terms of emulsion stability and anti-foaming ability. The upper limit of the acid value is preferably 60 mgKOH / g, more preferably 55 mgKOH / g, and even more preferably 50 mgKOH / g. On the other hand, the lower limit of the acid value is preferably 0.5 mgKOH / g, more preferably 1 mgKOH / g, and even more preferably 3 mgKOH / g in terms of anti-foaming ability. Furthermore, for example, the acid value is preferably 0.5 to 60 mgKOH / g, more preferably 1 to 55 mgKOH / g, and even more preferably 3 to 50 mgKOH / g. In addition, the non-volatile content of the water-permeability imparting agent in the present invention refers to the residue 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 becomes 0.15%.

[0051] The weight ratio (A / B) of the compound (A) to the surfactant (B) is not particularly limited as long as it is 0.05 to 1.0, but from the viewpoint of imparting defibration properties without impairing fiber bundling properties, the upper limit of the weight ratio is preferably 0.9, more preferably 0.8, and even more preferably 0.7, and the lower limit of the weight ratio is preferably 0.08, more preferably 0.11, and even more preferably 0.15. Also, for example, the range is preferably 0.08 to 0.9, and more preferably 0.15 to 0.7.

[0052] The proportion of compound (A) in the nonvolatile content of the treatment agent of the present invention is not particularly limited, but from the viewpoint of imparting defibration properties without impairing fiber bundling properties, it is preferably 5 to 50% by weight. The upper limit of this proportion is more preferably 45% by weight, even more preferably 40% by weight, and particularly preferably 35% 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 45% by weight is more preferable, and 15 to 35% by weight is more preferable.

[0053] The proportion of compound (A1) in compound (A) of the treatment agent of the present invention is not particularly limited, but from the viewpoint of imparting smoothness, it is preferably 1 to 60% by weight. The upper limit of this proportion is more preferably 55% by weight, and particularly preferably 50% by weight. Meanwhile, the lower limit of this proportion is more preferably 5% by weight, and particularly preferably 10% by weight. Furthermore, for example, 5 to 55% by weight is more preferable, and 10 to 50% by weight is even more preferable.

[0054] The proportion of compound (A2) in compound (A) of the treatment agent of the present invention is not particularly limited, but from the viewpoint of imparting smoothness, it is preferably 1 to 70% by weight. The upper limit of this proportion is more preferably 60% by weight, and particularly preferably 55% by weight. Meanwhile, the lower limit of this proportion is more preferably 10% by weight, and particularly preferably 15% by weight. Also, for example, 10 to 60% by weight is more preferable, and 15 to 55% by weight is even more preferable.

[0055] Compound (A) is R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms; and 2 and R 3 In terms of fiber-opening properties, it is preferable that the compound contains at least one compound selected from the compounds represented by the general formula (2) in which R are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, and 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms; and 2 and R 3 It is more preferable that the compound contains a compound represented by the general formula (2) in which each of the is independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms.

[0056] R in the compound (A) of the treating agent of the present invention 1The proportion of the compound represented by general formula (1), in which is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, is not particularly limited, but is preferably 5 to 60% by weight from the viewpoint of fiber-opening properties. The upper limit of this proportion is more preferably 55% by weight, even more preferably 50% by weight, and particularly preferably 45% by weight. On the other hand, the lower limit of this proportion is more preferably 10% by weight, even more preferably 15% by weight, and particularly preferably 20% by weight. Also, for example, it is more preferably 10 to 55% by weight, even more preferably 15 to 50% by weight, and particularly preferably 20 to 45% by weight.

[0057] R in the compound (A) of the treating agent of the present invention 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms. The proportion of the compound represented by general formula (2) is not particularly limited, but from the viewpoint of fiber-opening property, it is preferably 10 to 70% by weight. The upper limit of this proportion is more preferably 65% ​​by weight, even more preferably 60% by weight, and particularly preferably 55% by weight. On the other hand, the lower limit of this proportion is more preferably 15% by weight, even more preferably 20% by weight, and particularly preferably 25% by weight. Also, for example, it is more preferably 15 to 65% by weight, even more preferably 20 to 60% by weight, and particularly preferably 25 to 55% by weight.

[0058] The proportion of compound (A3) in compound (A) of the treatment agent of the present invention is not particularly limited, but from the viewpoint of imparting smoothness, it is preferably 0 to 70% by weight. The upper limit of this proportion is more preferably 60% by weight, and particularly preferably 55% by weight. Meanwhile, the lower limit of this proportion is more preferably 5% by weight, and particularly preferably 10% by weight. Furthermore, for example, it is more preferably 5 to 60% by weight, and even more preferably 10 to 55% by weight.

[0059] The weight ratio (A1 / (A2+A2)) of compound (A1) to the total of compound (A1) and compound (A2) is not particularly limited, but from the viewpoint of imparting smoothness, it is preferably 0.01 to 0.6. The upper limit of this weight ratio is more preferably 0.55, and particularly preferably 0.5. On the other hand, the lower limit of this weight ratio is more preferably 0.15, and particularly preferably 0.3. Furthermore, for example, it is more preferably 0.15 to 0.55, and even more preferably 0.3 to 0.5.

[0060] The weight ratio of compound (A1) to the total of compounds (A1), (A2), and (A3) (A1 / (A1+A2+A3)) is not particularly limited, but from the viewpoint of imparting smoothness, it is preferably 0.01 to 0.6. The upper limit of this weight ratio is more preferably 0.5, and particularly preferably 0.4. On the other hand, the lower limit of this weight ratio is more preferably 0.1, and particularly preferably 0.15. Furthermore, for example, it is more preferably 0.1 to 0.5, and even more preferably 0.15 to 0.4.

[0061] The proportion of the nonionic surfactant (B) in the nonvolatile content of the treatment agent of the present invention is not particularly limited, but from the viewpoint of providing adequate fiber bundling properties, it is preferably 50 to 95% by weight. The upper limit of this proportion is more preferably 90% by weight, and particularly preferably 85% by weight. Meanwhile, the lower limit of this proportion is more preferably 55% by weight, and particularly preferably 60% by weight. Furthermore, for example, 55 to 90% by weight is more preferable, and 60 to 85% by weight is even more preferable.

[0062] The proportion of at least one selected from the compound represented by formula (4) and the nitrogen-containing nonionic surfactant in the nonvolatile content of the treatment agent of the present invention is not particularly limited, but from the viewpoint of imparting adequate fiber bundling properties, it is preferably 20 to 95% by weight. The upper limit of this proportion is more preferably 90% by weight, and particularly preferably 85% by weight. Meanwhile, the lower limit of this proportion is more preferably 30% by weight, and particularly preferably 50% by weight. Furthermore, for example, 30 to 90% by weight is more preferable, and 50 to 85% by weight is even more preferable.

[0063] The proportion of inorganic phosphoric acid (salt) in the nonvolatile content of the treatment agent of the present invention is not particularly limited, but is preferably 0.01 to 3 wt% from the viewpoint of antistatic properties and suppression of moisture absorption. The upper limit of this proportion is more preferably 2 wt%, and particularly preferably 1 wt%. Meanwhile, the lower limit of this proportion is more preferably 0.02 wt%, and particularly preferably 0.03 wt%. Furthermore, for example, 0.01 to 2 wt% is more preferable, and 0.02 to 1 wt% is even more preferable.

[0064] [Treatment agent for regenerated cellulose fibers consisting of a set of treatment agents, a multi-agent first treatment agent for regenerated cellulose fibers, and a multi-agent second treatment agent for regenerated cellulose fibers] The treating agent for regenerated cellulose fibers of the present invention may be in the form of a multi-agent treating agent composed of a plurality of treating agent sets. The treatment agent for regenerated cellulose fibers, which is composed of a multi-agent set, is a treatment agent that includes a multi-agent first treatment agent for regenerated cellulose fibers containing compound (A) and a multi-agent second treatment agent for regenerated cellulose fibers containing nonionic surfactant (B), and is applied to regenerated cellulose fibers so that the organic phosphate ester compound (A) and the nonionic surfactant (B) satisfy the specific weight ratio of the present invention. By making the treatment agent of the present invention a multi-agent treatment agent, the storage stability of each of the organic phosphate ester compound (A) and the nonionic surfactant (B) can be improved, and stable nep suppression can be imparted to regenerated cellulose fibers. When used as a multi-component treatment agent, the treatment agent for regenerated cellulose fibers, the multi-component first treatment agent for regenerated cellulose fibers, and the multi-component second treatment agent for regenerated cellulose fibers, which are composed of a multiple treatment agent set of the present invention, exhibit excellent nep suppression properties by having the organic phosphate ester compound (A) and the nonionic surfactant (B) on the regenerated cellulose fibers in the specific weight ratio of the present invention.

[0065] <Processing agent for regenerated cellulose fibers, processing agent for regenerated cellulose fibers composed of a set of multiple processing agents, multi-component first processing agent for regenerated cellulose fibers, and method for manufacturing multi-component second processing agent for regenerated cellulose fibers> The treatment agent for regenerated cellulose fibers of the present invention can be produced by mixing compound (A) and nonionic surfactant (B), as well as other components as necessary. There are no particular restrictions on the order in which the components are mixed, and known methods can be used.

[0066] There are no particular limitations on the weight percentage of water and nonvolatile matter in the treatment agent for regenerated cellulose fibers. These may be appropriately determined taking into consideration, for example, the transportation costs of the treatment agent of the present invention and the ease of handling due to the emulsion viscosity. The weight percentage of water in the entire treatment agent for regenerated cellulose fibers is preferably 0.1 to 99.9% by weight, more preferably 1 to 99% by weight, and particularly preferably 2 to 95% by weight. The weight percentage (concentration) of nonvolatile matter in the entire treatment agent for regenerated cellulose fibers is preferably 0.1 to 99.9% by weight. The upper limit of this percentage is more preferably 99% by weight, and even more preferably 98% by weight. Meanwhile, the lower limit of this percentage is more preferably 1% by weight, and even more preferably 5% by weight. Furthermore, for example, 1 to 99% by weight is more preferably, and 5 to 98% by weight is even more preferably.

[0067] When the treatment agent for regenerated cellulose fibers is composed of a set of multiple treatment agents, the weight percentage of water in each of the multi-component first treatment agent for regenerated cellulose fibers containing compound (A) and the multi-component second treatment agent for regenerated cellulose fibers containing nonionic surfactant (B) is preferably 0 to 90% by weight, more preferably 0 to 80% by weight, and particularly preferably 0 to 70% by weight. The weight percentage (concentration) of nonvolatile matter in each of the first treatment agent and the second treatment agent is preferably 1 to 99% by weight, more preferably 3 to 90% by weight, and particularly preferably 5 to 80% by weight, for the first treatment agent, and is preferably 1 to 100% by weight, more preferably 3 to 99.95% by weight, and particularly preferably 5 to 99.9% by weight for the second treatment agent.

[0068] [Regenerated cellulose fiber] The regenerated cellulose fibers of the present invention are obtained by applying the above-mentioned treatment agent to the regenerated cellulose fiber body. The regenerated cellulose fibers of the present invention may be short fibers or long fibers, and short fibers are preferred in that they can more effectively suppress neps and thereby improve product quality. The adhesion rate of the nonvolatile components of the treatment agent to the fiber body is not particularly limited, but from the viewpoint of antistatic properties and openability, it is preferably 0.03 to 2% by weight, more preferably 0.1 to 1% by weight, of the cellulose fiber body.

[0069] The fiber body is not particularly limited as long as it is a regenerated cellulose fiber, and examples thereof include viscose rayon fiber, tenacity rayon fiber, high tenacity rayon fiber, high wet elasticity rayon fiber, cuprammonium rayon fiber, solvent spun cellulose fiber, polynosic fiber, etc.

[0070] The regenerated cellulose fibers of the present invention can be used for spinning, nonwoven fabrics, special papers, etc., with spinning being preferred because uniformity is more important.

[0071] [Method of applying a treatment agent for regenerated cellulose fibers] The treatment agent for regenerated cellulose fibers of the present invention may be applied to the raw regenerated cellulose fiber body as is without dilution, or it may be diluted with water or the like to a concentration such that the weight ratio of the total non-volatile matter is 0.01 to 10 weight % and applied to the raw regenerated cellulose fiber body as a diluted solution such as an emulsion. When the treatment agent for regenerated cellulose fibers of the present invention is used as a multi-agent treatment agent set, the method of applying the treatment agent set to the raw regenerated cellulose fiber body may be to mix all or part of the treatment agent set and apply it to the fiber immediately before applying it to the fiber, or each treatment agent that makes up the treatment agent set may be applied to the fiber separately. The process of applying the regenerated cellulose fiber treatment agent to the raw regenerated cellulose fiber body may be any of the processes of spinning, stretching, cutting, crimping, and refining the raw regenerated cellulose fiber body. The means for applying the regenerated cellulose fiber treatment agent of the present invention to the raw regenerated cellulose fiber body is not particularly limited, and methods such as roller oiling, spray oiling, and dip oiling may be used. A method that achieves the desired adhesion rate more uniformly and efficiently may be adopted, depending on the manufacturing process and characteristics of the regenerated cellulose fiber. Furthermore, drying methods such as drying with hot air or infrared rays, or drying by contact with a heat source may be used.

[0072] [Production of spun yarn] When the regenerated cellulose fiber of the present invention is used for spun yarn, even if the carding, drawing, roving, and fine spinning processes are performed at high speeds, the excellent opening properties prevent entanglement of the fibers, resulting in good nep suppression, and the moderate smoothness and fiber bundling properties ensure good draftability, resulting in a spun yarn with high uniformity and good quality. Spinning processes typically include carding, drawing, and spinning, and spun yarns are produced from staple fibers through these processes. These processes are not particularly limited, and known methods can be used. Here, we will briefly explain the spinning process in which staple fibers treated with the treating agent for regenerated cellulose fibers of the present invention are spun.

[0073] <Card process> The staple fibers treated with the treatment agent are untangled (opened) into fiber masses, then combed to remove ultrashort fibers and unopened portions, and finished into a sliver (or a web in the case of nonwoven fabric), which is then placed in a can using a coiling device (in the case of nonwoven fabric, the sliver is advanced to the next step in the form of a web). Use of the treatment agent of the present invention has the advantage of suppressing neps in the finished sliver or web, thereby reducing defects.

[0074] <Drilling process> The resulting carded sliver is stretched to increase the parallelism of the fibers, thereby increasing sliver strength and regulating the sliver thickness. The resulting sliver is placed in a can, similar to the carding process. The drawing process is usually repeated two to three times. The use of the treatment agent of the present invention has the advantages of good nep suppression and draftability, and high uniformity of the spun yarn.

[0075] <Spinning process> Typical processes for producing spun yarn include ring spinning, open-end spinning, and whirling air spinning (MVS). In ring spinning, a drawn sliver is lightly twisted and stretched prior to spinning to produce a string-like roving (roving), which is then further twisted and stretched to produce a spun yarn. The resulting spun yarn is wound onto a bobbin by utilizing the difference in peripheral speed between the spindle and the traveler. The use of the treatment agent of the present invention has the advantage of suppressing defects caused by neps and yarn unevenness due to poor draftability. In open-end spinning, the drawn sliver is first unraveled with a combing wire, and the fibers are bound and twisted using the centrifugal force of a rotor rotating at high speed to produce a spun yarn. The use of the treatment agent of the present invention has the advantage of suppressing yarn unevenness caused by neps and poor fiber opening, even when the open-end spinning process is accelerated. In the case of whirling air spinning, a drawn sliver is stretched and drafted to the required number of fibers, and then supplied to a whirling air spinning machine, where the swirling air flow in the machine causes the supplied fiber bundle to rotate while reversing the fiber ends around the region of the spindle tip, thereby twisting it spirally to form a spun yarn. The use of the fiber treating agent of the present invention has the advantage that yarn unevenness due to neps and poor fiber opening can be suppressed even when the whirling air spinning process is increased in speed.

[0076] <Blend> When producing spun yarn, natural fibers such as hemp, wool, cotton, and bleached cotton fibers; semi-synthetic fibers such as acetate and triacetate fibers; and synthetic fibers such as polyolefin fibers, polyester fibers, polyamide fibers, acrylic fibers, polyurethane fibers, polyvinyl chloride fibers, polyphenylene sulfide fibers, and composite fibers made of two or more thermoplastic resins can be mixed and used as needed within the range that does not impair the effects of the present invention. Examples of polyamide fibers include 6-nylon fibers, 6,6-nylon fibers, and aromatic polyamide fibers. [Example]

[0077] The present invention will be described below with reference to examples, but is not limited to these. The evaluation items and evaluation methods for each example and comparative example are as follows. The details of the treatment agents used in each example and comparative example and the evaluation results are summarized in Tables 1 to 3. In the tables, the blending ratios are all in weight percent unless otherwise specified.

[0078] [Measurement of the weight ratio (A1 / (A1+A2+A3)) in the organic phosphate ester compound (A)] The ratio of the compound (A1), the compound (A2), the compound (A3) and the inorganic phosphoric acid in the organic phosphate ester compound (A) is 31Measurements were performed using P-NMR. Approximately 150 mg of the nonvolatile content of the sample was weighed into a 5 mm diameter NMR sample tube and dissolved in approximately 0.5 mL of deuterated water (DO) or deuterated chloroform (CDCl) as a deuterated solvent. Measurements were performed using a 31P-NMR measurement system (BRUKER AVANCE400, 162 MHz) and a JEOL JNM-ECZ400R, 162 MHz. Phosphorus peaks from compounds (A1), (A2), and inorganic phosphate were detected between +4 and -1 ppm, but the assignments were determined in the following order from the low magnetic field: inorganic phosphate, compound (A1), and compound (A2). Meanwhile, the phosphorus peak from compound (A3) was detected between -5 and -15 ppm. After the assignment, the ratios of compound (A1), compound (A2), compound (A3) and inorganic phosphoric acid were calculated from the integral ratio, and the weight ratio of compound (A1) was calculated based on the formula (A1 / (A1+A2+A3)).

[0079] [Method for measuring acid value] The acid value (x mgKOH / g) referred to in the present invention was measured by the following method. The nonvolatile content of each treatment agent was used as a measurement sample, and 1 g of each sample was dissolved in 50 mL of a 1:1 xylene / ethanol solution containing 0.01% phenolphthalein. 0.1 mol / L potassium hydroxide ethanol solution was added dropwise to the solution, and the volume of the liquid (y mL) required to turn a faint pink color was measured and calculated using the following formula. x=y×5.61

[0080] [Organophosphate ester compounds] The methods for producing the organic phosphate ester compounds P-1-1 to P-5-1 and p-1 to p-2 used in the examples and comparative examples are described below. The components obtained by the manufacturing methods P-1-1 to P-5-1 and p-1 to p-2 are as shown in Tables 4 to 8, and the obtained organic phosphate ester compounds and inorganic phosphoric acids (salts) were mixtures of their respective unneutralized products with alkali metal salts and / or organic amine salts.

[0081] (P-1-1 manufacturing method) A 500 mL four-neck flask was charged with 193 g of n-tetradecyl alcohol, and while stirring, 54.1 g of tetraphosphorus decanoate was gradually added to the mixture to produce an unneutralized product. A 1-liter flask was charged with 357 g of ion-exchanged water and 96 g of a 50% weight concentration aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring to produce a partially neutralized product with a nonvolatile content of 40%.

[0082] (P-2-1 manufacturing method) A 500 mL four-neck flask was charged with 210 g of n-hexadecyl alcohol, and while stirring, 43.8 g of tetraphosphorus decaoxide was gradually added to the flask to allow the reaction to proceed, yielding an unneutralized product. A 1-liter flask was charged with 367 g of ion-exchanged water and 79 g of a 50% weight concentration aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring, yielding a partially neutralized product with a nonvolatile content of 40%. (P-2-2 manufacturing method) 212 g of n-hexadecyl alcohol was added to a 500 mL four-neck flask, and while stirring, 42.3 g of tetraphosphorus decaoxide was gradually added to the mixture to produce an unneutralized product. 370 g of ion-exchanged water and 76 g of a 50% weight concentration aqueous potassium hydroxide solution were placed in a 1-liter flask, and the unneutralized product was gradually added to the mixture while stirring to produce a partially neutralized product with a nonvolatile content of 40%.

[0083] (P-3-1 manufacturing method) A 500 mL four-neck flask was charged with 186 g of n-octadecyl alcohol, and while stirring, 34 g of tetraphosphorus decanoate was gradually added to the flask to allow the reaction to proceed, yielding an unneutralized product. A 1-liter flask was charged with 409 g of ion-exchanged water and 71 g of a 50% aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring, yielding a partially neutralized product with a nonvolatile content of 35%. (P-3-2 manufacturing method) A 500 mL four-neck flask was charged with 181 g of n-octadecyl alcohol, and while stirring, 37.9 g of tetraphosphorus decanoate was gradually added to the mixture to produce an unneutralized product. A 1-liter flask was charged with 409 g of ion-exchanged water and 72 g of a 50% weight concentration aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring to produce a partially neutralized product with a nonvolatile content of 35%. (P-3-3 manufacturing method) A 500 mL four-neck flask was charged with 153 g of n-octadecyl alcohol, and while stirring, 32.4 g of tetraphosphorus decaoxide was gradually added to the mixture to produce an unneutralized product. A 1-L flask was charged with 468 g of ion-exchanged water, 28.0 g of a 50% weight concentration aqueous potassium hydroxide solution, and 18.6 g of triethanolamine, and the unneutralized product was gradually added while stirring to produce a partially neutralized product with a nonvolatile content of 30%.

[0084] (Manufacturing method of P-4-1) A 500 mL four-neck flask was charged with 166 g of n-docosyl alcohol, and while stirring, 26.5 g of tetraphosphorus decanoate was gradually added to the flask to allow the reaction to proceed, yielding an unneutralized product. A 1-L flask was charged with 453 g of ion-exchanged water and 55 g of a 50% aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring, yielding a partially neutralized product with a nonvolatile content of 30%. (P-4-2 manufacturing method) A 500 mL four-neck flask was charged with 163 g of n-docosyl alcohol and 7.6 g of 75% phosphoric acid, and while stirring, 24.2 g of tetraphosphorus decoxide was gradually added to the mixture to produce an unneutralized product. A 1-L flask was charged with 446 g of ion-exchanged water and 60 g of a 50% weight concentration aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring to produce a partially neutralized product with a nonvolatile content of 30%.

[0085] (Manufacturing method of P-5-1) A 500 mL four-neck flask was charged with 182 g of iso-octadecyl alcohol, and while stirring, 35.8 g of tetraphosphorus decanoate was gradually added to the flask to allow the reaction to proceed, yielding an unneutralized product. A 1-liter flask was charged with 408 g of ion-exchanged water and 74 g of a 50% aqueous potassium hydroxide solution, and the unneutralized product was gradually added while stirring, yielding a partially neutralized product with a nonvolatile content of 35%.

[0086] (Manufacturing method of p-1) 207 g of 2-ethylhexyl alcohol was added to a 500 mL four-neck flask, and while stirring, 88.8 g of tetraphosphorus decaoxide was gradually added to the mixture to produce an unneutralized product. 264 g of ion-exchanged water and 140 g of a 50% weight concentration aqueous potassium hydroxide solution were placed in a 1-liter flask, and the unneutralized product was gradually added to the mixture while stirring to produce a partially neutralized product with a nonvolatile content of 50%.

[0087] (Manufacturing method of p-2) 220 g of n-dodecyl alcohol was added to a 500 mL four-neck flask, and while stirring, tetraphosphorus decaoxide was gradually added to a total of 74.1 g to produce an unneutralized product. 285 g of ion-exchanged water and 121 g of a 50% weight concentration aqueous potassium hydroxide solution were charged to a 1-liter flask, and the unneutralized product was gradually added while stirring to produce a partially neutralized product with a nonvolatile content of 50%.

[0088] [Nonionic surfactant (B)] The nonionic surfactants (B) used in the examples and comparative examples are shown in Table 9 and are as follows. B-6: Polyoxyethylene (10) dodecyl amino ether B-7: Polyoxyethylene (5) C12-13 secondary alkyl ether B-8: Polyoxyethylene (20) sorbitan monooleate

[0089] [Preparation of first treatment agent and second treatment agent] The organic phosphate ester compound, the nonionic surfactant (B), and the component (C) shown below were mixed to obtain the content ratios in the nonvolatile matter shown in Tables 10 and 11, to obtain the first treatment agent and the second treatment agent. (Component (C)) C-1: Mineral oil (viscosity 80 seconds) C-2: Dioctyl sulfosuccinate sodium salt C-3: Sulfated beef tallow sodium salt

[0090] [Examples 1 to 16 and Comparative Examples 1 to 8] The obtained first treatment agent and second treatment agent were diluted with 70°C warm water in the proportions shown in Tables 1 to 3 so that the weight percentage of nonvolatile matter became 0.6% by weight to obtain diluted solutions. Next, 2,000 g of each diluted solution of the regenerated cellulose fiber treatment agent was applied to 100 g of fiber body by the dip oiling method at a liquid temperature of 50°C, resulting in a non-volatile content of 0.20 wt% of the regenerated cellulose fiber treatment agent adhered to the fiber. The fiber body was viscose rayon fiber to which no regenerated cellulose fiber treatment agent had been applied, with a single fiber fineness of 1.3 Dtex and a fiber length of 38 mm. The fiber to which each diluted solution of the regenerated cellulose fiber treatment agent had been applied was placed in a hot air dryer at 105°C for 90 minutes, and then left to dry at room temperature for at least 8 hours to obtain cotton treated with the regenerated cellulose fiber treatment agent.

[0091] [Nep suppression] In an atmosphere of 30°C x 65% RH, 40 g of the treated cotton was subjected to an opening treatment using a Yamato Kiko Co., Ltd. fiber opening machine (model OP-400). The opened treated cotton was then fed into a random carding machine, and the discharged fleece was layered to form a fabric with a basis weight of 100 g / m. 2 A fiber web of the above formula was obtained. This fiber web was fed to a drawing frame (Hara Loom Works, Ltd.) and passed three times at a spinning speed of 700 m / min. Five grams of the resulting drawing sliver was taken, and the number of neps was measured. Evaluation was made based on the following criteria, with ◎ and ○ representing pass. ◎ (Very good): The number of neps per 1g of drawn sliver is less than 90 Good (Good): The number of neps per 1g of drawn sliver is 90 or more but less than 110 △ (bad): The number of neps per 1g of drawn sliver is 110 or more but less than 130 × (very poor): The number of neps per 1g of drawn sliver is 130 or more

[0092] [Fiber bundling ability] In an atmosphere of 30°C x 65% RH, 40 g of the treated cotton was subjected to an opening treatment using a Yamato Kiko Co., Ltd. fiber opening machine (model OP-400). The opened treated cotton was then fed into a random carding machine, and the discharged fleece was layered to form a fabric with a basis weight of 100 g / m. 2 A fiber web of the above formula was obtained. A 10 cm × 5 cm tensile test specimen was prepared from this fiber web, and a tensile test was performed at a speed of 50 m / min. The tensile test was performed in a room at 20°C under conditions of a load cell of 50 N using a tension-compression tester (TG-2kN tension-compression tester, manufactured by Minebea Co., Ltd.). The results were evaluated based on the following criteria, with ◎ and ○ representing pass. ◎ (Very good): Pull-out resistance of 2.0N or more ○ (Good): Pull-out resistance is 1.7N or more and less than 2.0N △ (Poor): Pull-out resistance is 1.4N or more and less than 1.7N × (very poor): Pull-out resistance less than 1.4N

[0093] [Quality of spun yarn] A roving made from 200 g of treated cotton was opened, carded, drawn, and roved on a miniature spinning machine. The roving was then spun on a Toyota Industries Corporation ring spinning machine (model RX-240NEW-EST / E) at 30°C and 65% RH to obtain a spun yarn. The resulting spun yarn was measured for U% using an automatic yarn unevenness tester. U% is calculated by selecting a measurement length (L) as shown in Figure 1, where X is the average yarn thickness within that interval, -100%, the starting point (A), and the end point (B) are F, and f is the area enclosed by the yarn thickness variation (unevenness curve) within the interval and X. The yarn quality at the time of spinning was evaluated based on the measured U% using the following evaluation criteria, with a rating of ○ indicating a pass. Good: U% is less than 10. × (bad): U% is 10 or more.

[0094] [Table 1]

[0095] Table 2

[0096] Table 3

[0097] Table 4

[0098] Table 5

[0099] Table 6

[0100] Table 7

[0101] Table 8

[0102] Table 9

[0103] Table 10

[0104] Table 11

[0105] As can be seen from Tables 1 and 2, the treatment agents for regenerated cellulose fibers in Examples 1 to 16 contain an organic phosphate ester compound (A) and a nonionic surfactant (B), and the weight ratio (A / B) of the compound (A) to the surfactant (B) is 0.05 to 1.0, so that they have good nep suppression properties and good yarn quality is obtained.

[0106] On the other hand, as can be seen from Table 3, when the organic phosphate ester compound (A) was not contained (Comparative Examples 1 to 3, 7, and 8), when the nonionic surfactant (B) was not contained (Comparative Example 5), and when the organic phosphate ester compound (A) and the nonionic surfactant (B) were contained but the weight ratio (A / B) was not 0.05 to 1.0 (Comparative Examples 4 and 6), the problem of nep suppression, which is the object of the present application, was not solved, and the yarn quality was poor. [Industrial Applicability]

[0107] Regenerated cellulose fibers treated with the treating agent for regenerated cellulose fibers of the present invention have good nep suppression properties, resulting in high-quality fiber structures, and can be used for spun yarns, nonwoven fabrics, etc.

Claims

1. A treatment agent for regenerated cellulose fibers, comprising the following organic phosphate ester compound (A) and nonionic surfactant (B), wherein the weight ratio (A / B) of the compound (A) to the surfactant (B) is 0.08 to 1.0: The agent for treating regenerated cellulose fibers has an acid value of 0.1 to 70 mgKOH / g of the nonvolatile content. Organic phosphate ester compound (A): An organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms, including a compound (A1) represented by the following general formula (1) and a compound (A2) represented by the following general formula (2): 【Chemistry 1】 (In formula (1), R １ is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. 【Chemistry 2】 (In formula (2), R ２ and R ３ are each independently a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. １ is a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium.

2. The treatment agent for regenerated cellulose fibers according to claim 1, wherein the compound (A) optionally contains a compound (A3) represented by the following general formula (3), and the weight ratio of the compound (A1) to the total of the compounds (A1), (A2), and (A3) (A1 / (A1+A2+A3)) is 0.01 to 0.6: 【Transformation 3】 (In formula (3), R ４ is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. １ and M ２ are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. ２ or R ５ It is. ５ is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. Y is 1 or 2. M ２ When there are two or more, they may be the same or different.)

3. The treatment agent for regenerated cellulose fibers according to claim 2, wherein the compound (A) includes a compound (A3) represented by the general formula (3).

4. The compound (A) is １ is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms; and ２ and R ３ The treatment agent for regenerated cellulose fibers according to claim 1, comprising at least one compound selected from the group consisting of compounds represented by general formula (2), each of which is independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms.

5. 2. The treatment agent for regenerated cellulose fibers according to claim 1, wherein the weight ratio (A / B) of the compound (A) to the surfactant (B) is 0.29 to 0.

54.

6. The nonionic surfactant (B) contains at least one selected from the group consisting of a compound represented by the following general formula (4) and a nitrogen-containing nonionic surfactant: The proportion of the nonionic surfactant (B) in the nonvolatile content of the treatment agent for regenerated cellulose fibers is 60 to 95% by weight. The treatment agent for regenerated cellulose fibers according to claim 1. 【Chemistry 4】 (In formula (4), R ６ is an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. ７ is a hydrogen atom, an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an alkanoyl group having 8 to 22 carbon atoms, or an alkenoyl group having 8 to 22 carbon atoms. a and b are each an integer of 0 to 20, and satisfy the relationship 3≦a+b≦40. ３ H ６ O) and (C ２ H ４ O) may be arranged randomly or in blocks.

7. The treating agent for regenerated cellulose fibers according to claim 1, which is used for spinning regenerated cellulose.

8. A treatment agent for regenerated cellulose fibers according to any one of claims 1 to 7, which is composed of a set of multiple treatment agents including a multi-component first treatment agent for regenerated cellulose fibers containing the compound (A) and a multi-component second treatment agent for regenerated cellulose fibers containing the nonionic surfactant (B).

9. A multi-component first treatment agent for regenerated cellulose fibers used as the treatment agent for regenerated cellulose fibers according to any one of claims 1 to 7, The treatment agent for regenerated cellulose fibers is a treatment agent for regenerated cellulose fibers composed of a plurality of treatment agent sets, A multi-component first treatment agent for regenerated cellulose fibers containing the compound (A) to be used in combination with a multi-component second treatment agent for regenerated cellulose fibers containing the nonionic surfactant (B).

10. A multi-component second treatment agent for regenerated cellulose fibers used as the treatment agent for regenerated cellulose fibers according to any one of claims 1 to 7, The treatment agent for regenerated cellulose fibers is a treatment agent for regenerated cellulose fibers composed of a plurality of treatment agent sets, A multi-component second treatment agent for regenerated cellulose fibers containing the nonionic surfactant (B) used in combination with a multi-component first treatment agent for regenerated cellulose fibers containing the compound (A).

11. A regenerated cellulose fiber to which the treating agent for regenerated cellulose fiber according to any one of claims 1 to 7 has been applied.

12. A spun yarn comprising the regenerated cellulose fibers of claim 11.

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