Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/165—Ethers
  • D06M13/17—Polyoxyalkyleneglycol ethers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
  • D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
  • D06M13/292—Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/53—Polyethers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/02—Natural fibres, other than mineral fibres
  • D06M2101/04—Vegetal fibres
  • D06M2101/06—Vegetal fibres cellulosic

Definitions

• the present invention relates to a treatment agent for regenerated cellulose fibers and its use.
• 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.
• a treatment agent for regenerated cellulose fibers is sometimes applied.
• treatment agents for regenerated cellulose fibers have been proposed, such as 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).
• 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.
• 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 can solve the problem.
• the water permeability imparting agent of the present invention includes the following aspects.
• 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:
• 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.)
• 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.
• 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.
• R4 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.
• Q is M2 or R5 .
• R5 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms.
• Y is 1 or 2.
• the compound (A) includes a compound (A3) represented by the general formula (3).
• ⁇ 4> The treatment agent for regenerated cellulose fibers according to any one of ⁇ 1> to ⁇ 3>, wherein the compound (A) comprises at least one compound selected from the group consisting of compounds represented by general formula (1) in which R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, and compounds represented by general formula (2) in which R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms.
• R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms
• R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms.
• ⁇ 5> The treating agent for regenerated cellulose fibers according to any one of ⁇ 1> to ⁇ 4>, wherein the acid value of the nonvolatile content of the treating agent for regenerated cellulose fibers is 0.1 to 70 mgKOH/g.
• nonionic surfactant (B) comprises at least one selected from the group consisting of a compound represented by the following general formula (4) and a nitrogen-containing nonionic surfactant:
• R6 represents 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.
• R7 represents 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 each represent 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.)
• the treating agent for regenerated cellulose fibers according to any one of ⁇ 1> to ⁇ 6>, which is used for spinning regenerated cellulose.
• the treatment agent for regenerated cellulose fibers described in any one of ⁇ 1> to ⁇ 7> 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).
• a multi-component first treatment agent for regenerated cellulose fibers used as a treatment agent for regenerated cellulose fibers described in any one of ⁇ 1> to ⁇ 7>, 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).
• a multi-component second treatment agent for regenerated cellulose fibers used as a treatment agent for regenerated cellulose fibers described in any one of ⁇ 1> to ⁇ 7>, 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> A regenerated cellulose fiber to which the treating agent for regenerated cellulose fiber according to any one of ⁇ 1> to ⁇ 8> has been applied.
• ⁇ 12> ⁇ 11> A spun yarn comprising the regenerated cellulose fiber according to ⁇ 11>.
• 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.
• the treatment agent for regenerated cellulose fibers of the present invention (hereinafter sometimes simply referred to as the treatment agent) contains an organic phosphate ester compound (A) and a nonionic surfactant (B) described below in specific proportions. This is explained in detail below.
• organic phosphate ester compound (A) is an organic phosphate ester compound having a hydrocarbon group having 14 to 22 carbon atoms, including the compound (A1) represented by the general formula (1) and the compound (A2) represented by the general formula (2).
• 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.
• R 1 is a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. From the viewpoint of 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.
• R1 is not particularly limited, and 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.
• M1 and M2 are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. From the viewpoint of emulsion stability and antistatic properties, M1 and M2 are preferably a hydrogen atom, an alkali metal, or an organic amine. M1 and M2 may be the same or different.
• alkali metals include potassium, sodium, and lithium, with potassium or sodium being preferred in terms of emulsion stability and antistatic properties.
• organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, and triethylamine.
• quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.
• 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 Examples include tadecyl phosphate bis(triethanolamine) salt, monoicosyl phosphate, monoicosyl phosphate monopotassium salt, monoicosyl phosphate dipotassium salt, monodocosyl phosphate, monodocosyl phosphate dipotassium salt, mono-isohex
• monohexadecyl phosphate monopotassium salt monohexadecyl phosphate dipotassium salt, monooctadecyl phosphate monopotassium salt, monooctadecyl phosphate dipotassium salt, monoicosyl phosphate dipotassium salt, and monoisooctadecyl phosphate dipotassium salt are preferred in terms of emulsion stability and fiber opening ability.
• 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.
• R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms. From the viewpoint of 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.
• R2 and R3 are not particularly limited, 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, an octyldodecyl group, etc.
• R2 and R3 may be the same or different.
• M 1 represents a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. From the viewpoints of emulsion stability and antistatic properties, M 1 is preferably an alkali metal or an organic amine.
• alkali metals include potassium, sodium, and lithium, with potassium or sodium being preferred in terms of emulsion stability and antistatic properties.
• organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, and triethylamine.
• quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.
• 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.
• 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.
• the organic phosphate ester compound (A) may contain a compound (A3) represented by the above general formula (3) (hereinafter, may be 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.
• R 4 and R 5 each independently represent a monovalent saturated hydrocarbon group having 14 to 22 carbon atoms.
• 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.
• R4 and R5 are not particularly limited, and 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.
• R4 and R5 may be the same or different.
• M1 and M2 are each independently a hydrogen atom, an alkali metal, ammonium, phosphonium, an organic amine, or a quaternary ammonium. From the viewpoint of emulsion stability and antistatic properties, M1 and M2 are preferably a hydrogen atom, an alkali metal, or an organic amine. M1 and M2 may be the same or different.
• alkali metals include potassium, sodium, and lithium, with potassium or sodium being preferred in terms of emulsion stability and antistatic properties.
• organic amines include alkanolamines such as ethanolamine, diethanolamine, and triethanolamine, and triethylamine.
• quaternary ammonium include alkyltrimethylammonium and dialkyldimethylammonium.
• Q is M2 or R5 .
• Y is 1 or 2. When there are two or more M2 's in a molecule, they may be the same or different.
• 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 tripotassium salt, Potassium salt, dihexadecyl pyrophosphate monopotassium salt, dihexadecyl pyrophosphate dipotassium salt, monohexadecyl pyrophosphate bis(
• 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, diocta ...
• 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 phosphat
• 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).
• 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.
• R6 is not particularly limited, but from the viewpoint of imparting the fiber bundling properties required in the spun yarn production process and the nonwoven fabric production process, it is preferably 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, more preferably an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms, and even more preferably an alkyl group having 8 to 22 carbon atoms.
• the upper limit of the carbon number of R6 is preferably 20, more preferably 18, and the lower limit of the carbon number is preferably 10, more preferably 12.
• 10 to 20 is preferable, and 12 to 18 is more preferable.
• R6 is not particularly limited, and examples thereof include linear alkyl groups 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, and 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,
• alkyl groups such as a silyl group, a 2-octyldodecyl group, and a 3,5,5-trimethylhexyl group; alkenyl groups such as an octenyl group, a decenyl group, a dodecenyl group, an octadecenyl group, a hexadecenyl group, an octadecenyl group, an icosenyl group, and a docosenyl group; alkanoyl groups such as an octanoyl group, a decanoyl group, a dodecanoyl group, a tetradecanoyl group, a hexadecanoyl group, an octadecanoyl group, an icosanoyl group, and a docosanoyl group; and alkenoyl groups such as an octenoyl group
• 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.
• R7 is not particularly limited, but from the viewpoint of fiber bundling ability, it is preferably 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, more preferably an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms, and even more preferably an alkyl group having 8 to 22 carbon atoms.
• the upper limit of the number of carbon atoms in R7 is preferably 20, more preferably 18, and the lower limit of the number of carbon atoms is preferably 10, more preferably 12. Furthermore, for example, 10 to 20 is preferable, and 12 to 18 is more preferable.
• R7 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
• 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,
• a and b are each an integer of 0 to 20, and satisfy the relationship 3 ⁇ a+b ⁇ 40.
• the upper limit of a is preferably 18, more preferably 15, and even more preferably 10.
• the upper limit of b is preferably 18, more preferably 15.
• the lower limit of b is preferably 3, more preferably 5.
• the upper limit of a+b is preferably 35, more preferably 30, and still more preferably 20.
• 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, a and b preferably satisfy a ⁇ b, and more preferably a ⁇ b.
• the repeating units (C 3 H 6 O) and (C 2 H 4 O) may be arranged randomly or may form blocks.
• the compound represented by general formula (4) is not particularly limited, but examples include polyoxyalkylene fatty alcohol ethers and polyoxyalkylene fatty acid esters.
• Polyoxyalkylene aliphatic alcohol ethers include, but are not limited to, 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, EO(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
• EO represents ethylene oxide
• PO represents propylene oxide
• the numbers in parentheses represent the number of moles of each alkylene oxide added.
• EO(5) means that 5 moles of ethylene oxide have been added
• PO(1)/EO(4) means that 1 mole of propylene oxide and 4 moles of ethylene oxide have been added.
• 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, PO(10)/EO(20)-oleate, and the like.
• the nitrogen-containing nonionic surfactant is not particularly limited as long as it is a nonionic surfactant having a nitrogen atom, and examples thereof include those having a structure in which 2 to 100 moles in total 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 thereof include organic amines having a monovalent hydrocarbon group having 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.
• 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 to 3 carbon atoms is preferably at least one selected from ethylene oxide and propylene oxide.
• 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.
• the lower limit of the number of moles is preferably 3 moles, more preferably 4 moles, and even more preferably 5 moles.
• 3 moles to 50 moles is preferable, and 5 moles to 20 moles is more preferable.
• Straight-chain saturated hydrocarbon groups are not particularly limited, but examples include octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, icosyl, and docosyl groups.
• saturated hydrocarbon groups having a branched chain structure examples include iso-octyl, iso-nonyl, iso-decyl, iso-undecyl, iso-dodecyl, iso-tridecyl, iso-tetradecyl, iso-hexadecyl, iso-octadecyl, iso-icosyl, iso-docosyl, 2-ethylhexyl, 2-butyloctyl, 2-hexyldecyl, and 2-octyldodecyl groups.
• 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. It may also be an alkynyl group having one triple bond as an unsaturated carbon bond, or an alkadiynyl group having two or more triple bonds.
• 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.
• unsaturated hydrocarbon groups with a branched chain structure containing 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.
• 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.
• nonionic surfactants other than the compound represented by general formula (4) and nitrogen-containing nonionic surfactants, but preferred examples include ester compounds 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 ester compounds having one or more hydroxyl groups in the molecule), polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene castor oil ethers, polyoxyalkylene hydrogenated castor oil ethers, and polycarboxylic acid esters.
• ester compounds 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 ester compounds having one or more hydroxyl groups in the molecule
• polyoxyalkylene sorbitan fatty acid esters polyoxyalkylene castor oil ethers
• polyoxyalkylene hydrogenated castor oil ethers polycar
• Ester compounds with one or more hydroxyl groups in the molecule have a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and are compounds with one or more hydroxyl groups in the molecule.
• 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 constituent element of the ester compound having one or more hydroxyl groups in the molecule is not particularly limited, but from the viewpoint of emulsion stability, saturated and/or unsaturated fatty acids having 12 to 18 carbon atoms are preferred.
• 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.
• 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.
• 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.
• 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.
• 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).
• Polyoxyalkylene hydrogenated castor oil ether is a compound whose structure is formed by adding an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide to hydrogenated castor oil.
• alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide
• polyoxyethylene hydrogenated castor oil ether include, but are not limited to, polyoxyethylene hydrogenated castor oil ether (polyoxyethylene (1 to 25 moles) hydrogenated castor oil ether).
• 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 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.
• 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.
• Polyoxyethylene polyoxypropylene glycol may be a block or random product.
• 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.
• 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.
• the monometal dihydrogen phosphate includes monopotassium dihydrogen phosphate, monosodium dihydrogen phosphate, etc.
• the dimetal hydrogen phosphate includes dipotassium hydrogen phosphate, disodium hydrogen phosphate, etc.
• the trimetal phosphate includes tripotassium phosphate, trisodium phosphate, etc.
• 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.
• 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 a hydroxyalkyl chain with 2 to 4 carbon atoms, and primary, secondary, and tertiary alkylamines having an alkyl chain with 1 to 4 carbon atoms.
• 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.
• 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 ⁇ -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.
• the lower limit of the alkyl group is more preferably 7, even more preferably 8, and particularly preferably 9.
• 8 to 18 is more preferable, and 10 to 13 is even more preferable.
• the regenerated cellulose fiber treating 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 treating 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 high melting point of the organic phosphate ester compound (A) provides excellent fiber opening properties, 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.
• 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 foam suppression.
• the upper limit of the acid value is preferably 60 mgKOH/g, more preferably 55 mgKOH/g, and even more preferably 50 mgKOH/g.
• 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 foam suppression.
• 0.5 to 60 mgKOH/g is preferred, more preferably 1 to 55 mgKOH/g, and even more preferably 3 to 50 mgKOH/g is preferred.
• 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 reaches 0.15%.
• the weight ratio (A/B) of compound (A) to surfactant (B), is between 0.05 and 1.0.
• the upper limit of this weight ratio is preferably 0.9, more preferably 0.8, and even more preferably 0.7
• the lower limit of this weight ratio is preferably 0.08, more preferably 0.11, and even more preferably 0.15.
• a range of 0.08 to 0.9 is preferred, and 0.15 to 0.7 is more preferred.
• the proportion of compound (A) in the non-volatile content of the treatment agent of the present invention is not particularly limited, but from the perspective 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.
• the lower limit of this proportion is more preferably 8% by weight, even more preferably 10% by weight, and particularly preferably 15% by weight.
• 8 to 45% by weight is more preferable, and 15 to 35% by weight is even more preferable.
• 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.
• the lower limit of this proportion is more preferably 5% by weight, and particularly preferably 10% by weight.
• 5 to 55% by weight is more preferable, and 10 to 50% by weight is even more preferable.
• the proportion of compound (A2) in compound (A) in the treatment agent of the present invention is not particularly limited, but from the perspective 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.
• the lower limit of this proportion is more preferably 10% by weight, and particularly preferably 15% by weight.
• 10 to 60% by weight is more preferable, and 15 to 55% by weight is even more preferable.
• compound (A) contains at least one selected from compounds represented by general formula (1) in which R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, and compounds represented by general formula (2) in which R 2 and R 3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, and it is more preferable that compound (A) contains a compound represented by general formula (1) in which R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms, and compounds represented by general formula (2) in which R 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 (1) in which R 1 is a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms in compound (A) of the treatment agent of the present invention is not particularly limited, but from the viewpoint of fiber-opening properties, it is preferably 5 to 60% by weight.
• the upper limit of this proportion is more preferably 55% by weight, even more preferably 50% by weight, and particularly preferably 45% by weight.
• the lower limit of this proportion is more preferably 10% by weight, even more preferably 15% by weight, and particularly preferably 20% by weight.
• 10 to 55% by weight is more preferable, 15 to 50% by weight is more preferable, and 20 to 45% by weight is particularly preferable.
• the proportion of the compound represented by general formula (2) in which R2 and R3 are each independently a monovalent saturated hydrocarbon group having 16 to 22 carbon atoms in compound (A) of the treatment agent of the present invention 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.
• the lower limit of this proportion is more preferably 15% by weight, even more preferably 20% by weight, and particularly preferably 25% by weight.
• 15 to 65% by weight is more preferable, 20 to 60% by weight is more preferable, and 25 to 55% by weight is particularly preferable.
• the proportion of compound (A3) in compound (A) of the treatment agent of the present invention is not particularly limited, but from the perspective 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.
• the lower limit of this proportion is more preferably 5% by weight, and particularly preferably 10% by weight.
• 5 to 60% by weight is more preferable, and 10 to 55% by weight is even more preferable.
• the weight ratio of compound (A1) to the total of compound (A1) and compound (A2) (A1/(A2+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.
• the lower limit of this weight ratio is more preferably 0.15, and particularly preferably 0.3. Furthermore, for example, 0.15 to 0.55 is more preferable, and 0.3 to 0.5 is even more preferable.
• 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.
• the lower limit of this weight ratio is more preferably 0.1, and particularly preferably 0.15.
• 0.1 to 0.5 is more preferable, and 0.15 to 0.4 is even more preferable.
• the proportion of nonionic surfactant (B) in the nonvolatile content of the treatment agent of the present invention is not particularly limited, but from the perspective of imparting appropriate 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.
• 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.
• the proportion of at least one compound selected from the group consisting of the compound represented by general 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 perspective of imparting appropriate 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.
• 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 preferred, and 50 to 85% by weight is even more preferred.
• the proportion of inorganic phosphoric acid (salt) in the non-volatile content of the treatment agent of the present invention is not particularly limited, but from the standpoint of antistatic properties and suppressing moisture absorption, it is preferably 0.01 to 3 wt%.
• the upper limit of this proportion is more preferably 2 wt%, and particularly preferably 1 wt%.
• the lower limit of this proportion is more preferably 0.02 wt%, and particularly preferably 0.03 wt%.
• 0.01 to 2 wt% is more preferable, and 0.02 to 1 wt% is even more preferable.
• Treatment agent for regenerated cellulose fibers composed of a set of multiple treatment agents, a multi-component first treatment agent for regenerated cellulose fibers, and a multi-component 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 plurality of treatment agent sets, is a treatment agent comprising a plurality of treatment agent sets including a multi-component first treatment agent for regenerated cellulose fibers containing compound (A) and a multi-component second treatment agent for regenerated cellulose fibers containing nonionic surfactant (B), and these treatment agents are 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.
• 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.
• 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.
• 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.
• 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.
• the lower limit of this percentage is more preferably 1% by weight, and even more preferably 5% by weight.
• 1 to 99% by weight is more preferred, and 5 to 98% by weight is even more preferred.
• 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 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.
• 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 treating 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.
• the fiber body is not particularly limited as long as it is a regenerated cellulose fiber, but examples 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.
• the regenerated cellulose fibers of the present invention can be used in spinning, nonwoven fabrics, specialty paper, etc., with spinning being preferred as uniformity is more important.
• the treatment agent for regenerated cellulose fibers of the present invention may be applied to the raw regenerated cellulose fiber body 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% by weight, and then applied to the raw regenerated cellulose fiber body as a diluted solution such as an emulsion.
• 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.
• ⁇ 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.
• ⁇ Drilling process> The resulting carded sliver is stretched to increase the parallelism of the fibers, thereby increasing sliver strength and regulating the sliver diameter.
• the resulting sliver is placed in a can, similar to the carding process.
• the drawing process is usually repeated two or three times.
• the use of the treatment agent of the present invention offers the advantages of good nep suppression and draftability, as well as high uniformity in the spun yarn.
• Typical processes for producing spun yarn include ring spinning, open-end spinning, and whirling air spinning (MVS).
• 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 due to neps and yarn irregularities caused by poor draftability.
• the drawn sliver is first unraveled with a combing wire, and the fibers are bound and twisted by 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 irregularities caused by neps and poor fiber opening, even when the open-end spinning process is accelerated.
• 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.
• ⁇ 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.
• polyamide fibers include 6-nylon fibers, 6,6-nylon fibers, and aromatic polyamide fibers.
• 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 measured as a sample by dissolving 1 g of each sample in 50 mL of a 1:1 xylene/ethanol solution containing 0.01% phenolphthalein.
• Organic phosphate 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 production 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 and alkali metal salts and/or organic amine salts.
• 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) dodecylamino ether B-7: Polyoxyethylene (5) C12-13 secondary alkyl ether B-8: Polyoxyethylene (20) sorbitan monooleate
• Examples 1 to 16 and Comparative Examples 1 to 8 The obtained first treatment agent and second treatment agent were diluted with warm water at 70°C in the proportions shown in Tables 1 to 3 so that the weight ratio 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, so that the amount of non-volatile matter of the regenerated cellulose fiber treatment agent attached to the fiber was 0.20 wt%.
• 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.
• ⁇ (good) The number of neps per 1g of drawn sliver is 90 or more but less than 110.
• ⁇ (poor) The number of neps per 1g of drawn sliver is 110 or more but less than 130.
• ⁇ (very bad) The number of neps per 1g of drawn sliver is 130 or more.
• the tensile test was performed using a tension-compression tester (TG-2kN type tension-compression tester, manufactured by Minebea Co., Ltd.) under conditions of a load cell of 50 N in a room at 20°C, and the results were evaluated based on the following evaluation criteria, with ⁇ and ⁇ representing pass.
• ⁇ very good: Pull-out resistance force of 2.0 N or more ⁇
• good Pull-out resistance force of 1.7 N or more but less than 2.0 N ⁇
• (poor) Pull-out resistance force of 1.4 N or more but less than 1.7 N ⁇
• Very poor Pull-out resistance force less than 1.4 N
• a roving prepared by subjecting 200 g of treated cotton to the processes of opening, carding, drawing, and roving on a miniature spinning machine was spun on a Toyota Industries Corporation ring spinning machine (model RX-240NEW-EST/E) in an atmosphere of 30°C and 65% RH to obtain a spun yarn.
• the resulting spun yarn was measured for U% using an automatic yarn unevenness tester.
• the yarn quality at the time of spinning was evaluated based on the measured U% and the following evaluation criteria, with a rating of "good” indicating a passing grade.
• 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, resulting in good nep suppression and good yarn quality.
• Regenerated cellulose fibers treated with the regenerated cellulose fiber treatment agent of the present invention have excellent nep suppression properties, resulting in high-quality fiber structures that can be used for spun yarn, nonwoven fabrics, etc.

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