JP2007107131A - Treatment agent and treatment method for synthetic fiber for producing nonwoven fabric and the synthetic fiber for producing nonwoven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment agent sufficiently corresponding to recent tendency of high speed production of nonwoven fabrics, concretely, able to add excellent card passing properties to a used synthetic fiber and excellent uniformity of the ground to a carded web at the same time, more over excellent initial hydrophobicity and durable hydrophobicity to an obtained nonwoven fabric in producing the nonwoven fabric. <P>SOLUTION: As the treatment agent for synthetic fibers for producing nonwoven fabrics, surfactants containing ≥90 mass% sum total of three components comprising a specific nonionic surfactant, a specific anionic surfactant and a specific polyglycerol fatty acid ester and consisting of 20-70 mass% nonionic surfactant, 15-50 mass% anionic surfactant and 10-40 mass% polyglycerol fatty acid ester are used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a processing agent and a processing method for synthetic fibers for producing nonwoven fabrics, and synthetic fibers for producing nonwoven fabrics. More specifically, it can sufficiently cope with the recent increase in the production speed of nonwoven fabrics, and is excellent in initial hydrophilicity and durable hydrophilicity. The present invention relates to a processing agent and a processing method for a synthetic fiber for producing a nonwoven fabric and a synthetic fiber for producing a nonwoven fabric.

  Conventionally, as a treating agent for synthetic fibers for producing a nonwoven fabric requiring hydrophilic properties, 1) polyoxyalkylene-modified polyorganosiloxane (see, for example, Patent Document 1), 2) polyoxyalkylene-modified polyorganosiloxane and alkylol Blends with amide type compounds (for example, see Patent Document 2), 3) Blends of polyglycerin fatty acid esters or polyoxyalkylene-modified polyorganosiloxanes (for example, see Patent Document 3), 4) Polyether polyester block co-polymers Blend of polymer or polyoxyalkylene-modified polyorganosiloxane (see, for example, Patent Document 4) 5) Blend of polyoxyalkylene-modified polyorganosiloxane and a surfactant having a hydrocarbon group having 28 or more carbon atoms Product (see, for example, Patent Document 5), 6) long chain alkyl Formulation of a nonionic surfactant having a group and an alkyl phosphate salt having 12 to 22 carbon atoms (for example, see Patent Document 6), 7) Formulation of a polyglycerin ester and a nonionic surfactant having a long-chain alkyl group A thing (for example, refer patent document 7) etc. is proposed.

However, these conventionally proposed treatment agents have a problem in that they are extremely insufficient in responding to the recent increase in the production rate of nonwoven fabrics and imparting excellent initial hydrophilicity and durable hydrophilicity to the obtained nonwoven fabrics. There is.
JP-A-1-148879 JP-A-1-148880 JP-A-2-216265 JP-A-8-226082 JP-A-2-080672 JP 2001-3271 A JP 2001-89976 A

  The problem to be solved by the present invention can sufficiently cope with the recent increase in the speed of nonwoven fabric production. Specifically, in the production of nonwoven fabrics, it is obtained at the same time as imparting excellent card passing properties to the synthetic fibers used. A processing agent and a processing method for synthetic fibers for producing nonwoven fabric, which can impart excellent uniformity of formation to the card web, and can impart excellent initial hydrophilicity and durable hydrophilicity to the obtained nonwoven fabric, and nonwoven fabric Providing synthetic fibers for manufacturing.

  This invention which solves the above-mentioned subject is a processing agent of synthetic fiber for nonwoven fabric manufacture, and contains 90 mass% or more of the following A ingredient, B ingredient, and C ingredient in total, and this A ingredient is 20 It is related to a treating agent for synthetic fibers, characterized by comprising -70% by mass, 15-50% by mass of the B component and 10-40% by mass of the C component.

  Component A: one or two or more selected from the following nonionic surfactants represented by the following chemical formula 1, the following nonionic surfactant D, and the following nonionic surfactant E

In chemical formula 1,
R ¹ : an aliphatic hydrocarbon group having 8 to 50 carbon atoms or an alkylphenyl group having an alkyl group having 8 to 18 carbon atoms R ² : a hydrogen atom or an acyl group having 1 to 22 carbon atoms X: an oxygen atom or a carbonyloxy group Y: a residue obtained by removing all hydroxyl groups from a polyalkylene glycol having a polyoxyalkylene group composed of a total of 5 to 100 oxyethylene units and / or oxypropylene units

  Nonionic surfactant D: selected from the following alkylene oxide adduct J and the following alkylene oxide adduct K

  Alkylene oxide adduct J: alkylene obtained by adding ethylene oxide and / or propylene oxide to a partial ester compound of a 3-6 valent aliphatic alcohol and a fatty acid having 8 to 18 carbon atoms, castor oil and hydrogenated castor oil Oxide adduct

  Alkylene oxide adduct K: A product obtained by esterifying an alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to a trivalent to hexavalent aliphatic alcohol with a fatty acid having 8 to 18 carbon atoms.

  Nonionic surfactant E: alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to an aliphatic amide having an acyl group having 8 to 18 carbon atoms

  Component B: One or more selected from the following organic sulfonic acid anionic surfactants, the following organic phosphoric acid anionic surfactants, and the following organic sulfate anionic surfactants

  Organic sulfonic acid anionic surfactant: alkyl sulfonate having 8 to 16 carbon atoms, alkylbenzene sulfonate having an alkyl group having 8 to 12 carbon atoms, and 1,2-bis having an alkyl group having 4 to 12 carbon atoms Selected from (dialkyloxycarbonyl) -ethanesulfonates

  Organic phosphate anionic surfactant: alkyl phosphate ester salt having a linear alkyl group having 8 to 14 carbon atoms, alkyl phosphate ester salt having a branched alkyl group having 8 to 24 carbon atoms, and 8 to 16 carbon atoms Selected from polyoxyethylene alkyl ether phosphates having alkyl groups and polyoxyethylene alkylphenyl ether phosphates having alkyl groups having 8 to 12 carbon atoms

  Organic sulfate ester anionic surfactant: alkyl sulfate salt having 8 to 16 carbon atoms, polyoxyethylene alkylphenyl ether sulfate salt having an alkyl group having 8 to 12 carbon atoms, and alkyl group having 8 to 16 carbon atoms Selected from polyoxyethylene alkyl ether sulfates

  Component C: Polyglycerin having a condensation degree of 2 to 14 was esterified with an aliphatic monocarboxylic acid having 8 to 18 carbon atoms and / or an ester-forming compound of an aliphatic monocarboxylic acid having 8 to 18 carbon atoms. Polyglycerin fatty acid ester

  Moreover, this invention is a processing method of the synthetic fiber for nonwoven fabric manufacture, Comprising: The above-mentioned processing agent which concerns on this invention is made into 0.1-15 mass% aqueous liquid, This aqueous liquid is made into the synthetic fiber for nonwoven fabric manufacture. On the other hand, the present invention relates to a treatment method characterized by adhering the treatment agent in an amount of 0.1 to 0.8% by mass.

  Furthermore, this invention relates to the synthetic fiber for nonwoven fabric manufacture obtained by the processing method concerning above-described this invention.

  First, the treatment agent for synthetic fibers for producing nonwoven fabric according to the present invention (hereinafter simply referred to as the treatment agent of the present invention) will be described. The A component to be provided to the treatment agent of the present invention is one or more selected from the nonionic surfactant represented by Chemical Formula 1, the nonionic surfactant D, and the nonionic surfactant E.

In the nonionic surfactant represented by Chemical formula 1, R ^{1 in} Chemical formula ¹ is 1) Octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group Group, nonadecyl group, eicosyl group, henecosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octacosyl group, nonacosyl group, triacontyl group, hentriacontyl group, dotriacontyl group, tritriacontyl group , Tetracontyl group, hentetracontyl group, dotetracontyl group, tritetracontyl group, pentacontyl group, 2-methyl-pentyl group, 2-ethyl-hexyl group, 2-propyl-heptyl group, 2-butyl-octyl group 2-pentyl-nonyl Group, 2-hexyl-decyl group, 2-heptyl-undecyl group, 2-octyl-dodecyl group, 2-nonyl-tridecyl group, 2-decyl-tetradecyl group, 2-undecyl-pentadecyl group, 2-dodecyl-hexadecyl group 10-undecenyl group, 9c-octadecenyl group, 9t-octadecenyl group, 9c, 12c-octadecadienyl group, 9c, 12c, 15c-octadecatrienyl group, 9c-eicosenyl group, 5,8,11,14 -C8-8 aliphatic hydrocarbon groups such as eicosatetraenyl group, 13c-docosenyl group and 13t-docosenyl group, 2) C8-18 carbon atoms such as octylphenyl group, nonylphenyl group, dodecylphenyl group, etc. And an alkylphenyl group having an alkyl group. Of these, R ¹ is preferably an alkyl group having 30 to 50 carbon atoms.

R ² in Chemical Formula 1 is 1) hydrogen atom, 2) formyl group, acetyl group, propanoyl group, butanoyl group, hexanoyl group, heptanoyl group, octanoyl group, nonanoyl group, decanoyl group, hexadecanoyl group, octadecanoyl group Group, a hexadecenoyl group, an eicosenoyl group, an octadecenoyl group, etc., and an acyl group having 1 to 22 carbon atoms. Among these, R ² is preferably a hydrogen atom, an acetyl group, a propanoyl group, a butanoyl group or other acyl group having 1 to 4 carbon atoms, and more preferably a hydrogen atom. X in Chemical Formula 1 is an oxygen atom or a carbonyloxy group, and is preferably an oxygen atom. Further, Y in Chemical Formula 1 is a residue obtained by removing all hydroxyl groups from a polyalkylene glycol having a polyoxyalkylene group composed of a total of 5 to 100 oxyethylene units and / or oxypropylene units. However, a residue obtained by removing all hydroxyl groups from polyethylene glycol having a polyoxyethylene group composed of 10 to 90 oxyethylene units is preferable.

  Specific examples of the nonionic surfactant represented by Chemical Formula 1 described above include α-triacontyl-ω-hydroxy-polyoxyethylene, α-tetracontyl-ω-hydroxy-polyoxyethylene, α-pentacontyl-ω-. Hydroxy-polyoxyethylene, α-triacontyl-ω-hydroxy-polyoxypropylene, α-tetracontyl-ω-hydroxy-polyoxypropylene, α-pentacontyl-ω-hydroxy-polyoxypropylene, α-triacontyl-ω-hydroxy -Polyoxyethylene polyoxypropylene, α-tetracontyl-ω-hydroxy-polyoxyethylene polyoxypropylene, α-pentacontyl-ω-hydroxy-polyoxyethylene polyoxypropylene, α-triacontyl-ω-acetyloxy-polyoxy Siethylene, α-tetracontyl-ω-propanoyloxy-polyoxyethylene, α-pentacontyl-ω-butanoyloxy-polyoxyethylene, α-triacontyl-ω-acetyloxy-polyoxypropylene, α-tetracontyl-ω- Propanoyloxy-polyoxypropylene, α-pentacontyl-ω-hydroxy-polyoxypropylene, α-triacontyl-ω-acetyloxy-polyoxyethylene polyoxypropylene, α-tetracontyl-ω-propanoyloxy-polyoxyethylene Polyoxypropylene, α-pentacontyl-ω-butanoyloxy-polyoxyethylene polyoxypropylene, α-nonylphenyl-ω-hydroxy-polyoxyethylene, α-nonylphenyl-ω-hydroxy-polyoxyethylene Polyoxypropylene, α-nonylphenyl-ω-acetyloxy-polyoxyethylene, α-nonylphenyl-ω-propanoyloxy-polyoxypropylene, α-nonylphenyl-ω-acetyloxy-polyoxyethylene polyoxypropylene, etc. Is mentioned.

  Nonionic surfactant D includes 1) alkylene oxide adduct J, 2) alkylene oxide adduct K, and 3) mixtures thereof.

  As the alkylene oxide adduct J, 1) an alkylene oxide adduct J-1 obtained by adding ethylene oxide and / or propylene oxide to a partial ester compound of a tri- to hexavalent aliphatic alcohol and a fatty acid having 8 to 18 carbon atoms, 2) Alkylene oxide adduct J-2 obtained by adding ethylene oxide and / or propylene oxide to castor oil, 3) Alkylene oxide adduct J-3 obtained by adding ethylene oxide and / or propylene oxide to hardened castor oil.

  Examples of the trivalent to hexavalent aliphatic alcohol used as a raw material in the alkylene oxide adduct J-1 include glycerin, trimethylolpropane, sorbitan, diglycerin, ditrimethylolpropane, pentaerythritol, triglycerin, sorbitol, and dipentaerythritol. Among them, trivalent to pentavalent aliphatic alcohols such as glycerin, trimethylolpropane, sorbitan, pentaerythritol, and triglycerin are preferable. Other fatty acids having 8 to 18 carbon atoms used as other raw materials include saturated aliphatic acids such as caproic acid, caprylic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, and stearic acid. Examples thereof include aliphatic monoene monocarboxylic acids such as monocarboxylic acid, Linderic acid, palmitoleic acid, oleic acid, elaidic acid and vaccenic acid, and aliphatic non-conjugated polyene monocarboxylic acids such as linoleic acid, linolenic acid and arachidonic acid. Examples of the partial ester compound of a 3-6 valent aliphatic alcohol and a C8-18 fatty acid as exemplified above are 1) 1 mol of a trivalent aliphatic alcohol such as glycerin or trimethylolpropane and an aliphatic group. Fatty acid mono- or diester of trivalent aliphatic alcohol or mixed ester thereof obtained from 1 to 2 mol of monocarboxylic acid, 2) 1 mol of tetravalent aliphatic alcohol such as pentaerythritol and aliphatic monocarboxylic acid 1 to 3 mol of a fatty acid mono-triester of a tetravalent aliphatic alcohol or a mixed ester thereof, 3) 1 mol of a pentavalent aliphatic alcohol such as triglycerin and 1 to 1 of an aliphatic monocarboxylic acid 4 mol of fatty acid mono-tetra ester of fatty alcohol or mixed ester thereof obtained from 4 mol, 4) Obtained from hexavalent aliphatic alcohol 1 mol of aliphatic monocarboxylic acids 1-5 moles as Bitoru include hexavalent aliphatic mixed ester fatty acid mono-penta esters or these alcohols, and the like.

  The alkylene oxide adduct J-1 is obtained by adding ethylene oxide and / or propylene oxide to the partial ester compound as described above. The number of added moles of ethylene oxide and / or propylene oxide is not particularly limited, but it is preferable that the total amount of ethylene oxide and / or propylene oxide is 8 to 60 moles per mole of partial ester compound, and among these, 8 to 40 moles are preferable. Is more preferably ethylene oxide.

  The alkylene oxide adduct J-2 is obtained by adding ethylene oxide and / or propylene oxide to castor oil. The number of moles of ethylene oxide and / or propylene oxide added is not particularly limited, but it is preferable that the total amount of ethylene oxide and / or propylene oxide is 8 to 60 moles per mole of castor oil. It is more preferable to use ethylene oxide.

  The alkylene oxide adduct J-3 is obtained by adding ethylene oxide and / or propylene oxide to hydrogenated castor oil. The number of moles of ethylene oxide and / or propylene oxide added is the same as that described above for adding these to castor oil.

  As the alkylene oxide adduct K, 1) all the hydroxyl groups of an alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to a trivalent to hexavalent aliphatic alcohol are esterified with a fatty acid having 8 to 18 carbon atoms. Esterified products, 2) partially esterified products obtained by esterifying a hydroxyl group of a part of an alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to a trivalent to hexavalent aliphatic alcohol with a fatty acid having 8 to 18 carbon atoms. . Here, the trivalent to hexavalent aliphatic alcohol and the fatty acid having 8 to 18 carbon atoms are the same as those described above for the alkylene oxide adduct J-1.

  Regarding the alkylene oxide adduct K, the complete esterified product is as follows: 1) 1 mol of a trivalent alkylene oxide adduct obtained by adding an alkylene oxide to a trivalent aliphatic alcohol such as glycerin or trimethylolpropane has 8 to 8 carbon atoms. 2) Completely esterified with 3 moles of 18 fatty acids 2) 1 mole of a tetravalent alkylene oxide adduct obtained by adding an alkylene oxide to a tetravalent aliphatic alcohol such as pentaerythritol, 4 moles of a fatty acid having 8 to 18 carbon atoms 3) 1 mol of a pentavalent alkylene oxide adduct obtained by adding an alkylene oxide to a pentavalent aliphatic alcohol such as triglycerin was completely esterified with 5 mol of a fatty acid having 8 to 18 carbon atoms. 4) Hexavalent aliphatic alcohols such as dipentaerythritol Hexavalent alkylene oxide adduct 1 mole of adding an alkylene oxide to Lumpur include those completely esterified with fatty acid 6 mol of 8 to 18 carbon atoms.

  Regarding the alkylene oxide adduct K, as the partial esterified product, 1) 1 mol of a trivalent alkylene oxide adduct obtained by adding an alkylene oxide to a trivalent aliphatic alcohol such as glycerin or trimethylolpropane has 8 to 8 carbon atoms. 1 partly esterified with 1 or 2 moles of 18 fatty acids, 2) 1 mole of a tetravalent alkylene oxide adduct obtained by adding an alkylene oxide to a tetravalent aliphatic alcohol such as pentaerythritol with 8 to 18 carbon atoms 1 to 3 mol partially esterified 3) 1 mol of a pentavalent alkylene oxide adduct obtained by adding an alkylene oxide to a pentavalent aliphatic alcohol such as triglycerin is a fatty acid 1 to 4 having 8 to 18 carbon atoms Partially esterified in moles, 4) 6 such as dipentaerythritol Like those hexavalent alkylene oxide adduct 1 mole obtained by adding an alkylene oxide to an aliphatic alcohol partially esterified with fatty acids 1 to 5 moles of 8-18 carbon atoms and the like.

  In the alkylene oxide adduct K described above, the number of moles of ethylene oxide and / or propylene oxide added to the trivalent to hexavalent aliphatic alcohol is not particularly limited. It is preferable that the total of propylene oxide is 8 to 60 mol, and among these, 8 to 40 mol is more preferably ethylene oxide.

  The nonionic surfactant E is an alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to an aliphatic amide having an acyl group having 8 to 18 carbon atoms. Examples of the aliphatic amide having an acyl group having 8 to 18 carbon atoms include octane amide, nonane amide, decanamide, undecanamide, dodecanamide, tridecanamide, tetradecanamide, pentadecanamide, hexadecanamide, heptadecanamide, octadecanamide and the like. Among them, an aliphatic amide having an acyl group having 12 to 18 carbon atoms is preferable. The number of moles of ethylene oxide and / or propylene oxide added to the aliphatic amide is not particularly limited, but it is preferable that the total amount of ethylene oxide and / or propylene oxide is 5 to 30 moles per mole of aliphatic amide. It is more preferable to use 5 to 20 mol of ethylene oxide. Specific examples of the nonionic surfactant E include N, N-bis [poly (oxyethylene)] alkanamide, N, N-bis [poly (oxypropylene)] alkanamide, N, N-bis [poly ( Oxyethylene / oxypropylene)] alkanamide, N, N-bis [poly (oxyethylene)] alkeneamide, N, N-bis [poly (oxypropylene)] alkenamide, N, N-bis [poly (oxyethylene) -Oxypropylene)] alkeneamide and the like.

The component A has been described above. As the component A, R ^{1 in} Chemical Formula ¹ is an alkyl group having 30 to 50 carbon atoms, R ² is a hydrogen atom, X is an oxygen atom, and Y is 10 to 90 oxyethylene. What contains 25 mass% or more of nonionic surfactant shown by Chemical formula 1 in the case of being the residue remove | excluding all the hydroxyl groups from the polyethyleneglycol which has the polyoxyethylene group comprised by the unit in A component is preferable. .

  Component B to be provided to the treatment agent of the present invention is one or more selected from organic sulfonic acid anionic surfactants, organic phosphoric acid anionic surfactants and organic sulfate ester anionic surfactants.

  Examples of organic sulfonic acid anionic surfactants include 1) alkyl sulfonic acids having 8 to 16 carbon atoms such as sodium octyl sulfonate, sodium decyl sulfonate, sodium dodecyl sulfonate, lithium tetradecyl sulfonate, and potassium hexadecyl sulfonate. Salt, 2) alkylbenzenesulfonate having an alkyl group having 8 to 12 carbon atoms such as potassium octylbenzenesulfonate, sodium dodecylbenzenesulfonate, and the like, 3) sodium 1,2-bis (dibutyloxycarbonyl) -ethanesulfonate, 1,2-bis (dipentyloxycarbonyl) -ethanesulfonic acid potassium, 1,2-bis (dihexyloxycarbonyl) -ethanesulfonic acid lithium, 1,2-bis (diheptyloxycarbonyl) -ethanesulfonic acid sodium 1,2-bis (dioctyloxycarbonyl) -ethanesulfonic acid sodium, 1,2-bis (dinonyloxycarbonyl) -ethanesulfonic acid lithium, 1,2-bis (didecyloxycarbonyl) -ethanesulfonic acid sodium salt 1,2-bis (diundecyloxycarbonyl) -ethanesulfonic acid sodium, 1,2-bis (didodecyloxycarbonyl) -ethanesulfonic acid sodium, etc. Bis (dialkyloxycarbonyl) -ethanesulfonate is mentioned, among them, alkylsulfonate having 10 to 15 carbon atoms, alkylbenzenesulfonate having an alkyl group having 8 to 12 carbon atoms, and having 8 to 12 carbon atoms. 1,2-bis (dialkyloxycarbonyl) -alkyl having an alkyl group Nsuruhon acid salts are preferred.

  As organic phosphate anionic surfactants, 1) carbon such as octyl phosphate ester salt, isooctyl phosphate ester salt, decyl phosphate ester salt, dodecyl phosphate ester salt, tridecyl phosphate ester salt, tetradecyl phosphate ester salt Alkyl phosphate ester salt having a linear alkyl group of 8 to 14 2) Isooctyl phosphate ester salt, 2-ethylhexyl phosphate ester salt, isotridecyl phosphate ester salt, isohexadecyl phosphate ester salt, etc. Alkyl phosphate ester salt having a branched alkyl group having 8 to 24 carbon atoms, 3) polyoxyethylene octyl ether phosphate ester salt, polyoxyethylene isooctyl ether phosphate ester salt, polyoxyethylene-2-ethylhexyl ether phosphate Acid ester salt, polyoxyethylene Ndecyl ether phosphate, polyoxyethylene dodecyl ether phosphate, polyoxyethylene tridecyl ether phosphate, polyoxyethylene tetradecyl ether phosphate, polyoxyethylene hexadecyl ether phosphate Polyoxyethylene alkyl ether phosphate ester salt having an alkyl group having 8 to 16 carbon atoms such as 4) polyoxyethylene octylphenyl ether phosphate ester salt, polyoxyethylene isooctylphenyl ether phosphate ester salt, polyoxyethylene Polyoxyethylene alkylphenyl ether having an alkyl group having 8 to 12 carbon atoms, such as decylphenyl ether phosphate ester salt and polyoxyethylene dodecylphenyl ether phosphate ester salt Examples thereof include acid ester salts. Among them, alkyl phosphate ester salts having a linear alkyl group having 8 to 14 carbon atoms, having an alkyl group having 8 to 14 carbon atoms, and having 1 to 10 oxyethylene units. A polyoxyethylene alkyl ether phosphate ester salt is preferred. Each phosphate ester salt as described above includes monoesters alone, diesters alone, and mixtures of monoesters and diesters, and the diesters have the same alkyl group. (Symmetrical diesters) and diesters having different alkyl groups (asymmetrical diesters) are included.

  Examples of organic sulfate anionic surfactants include 1) alkyl sulfate esters having 8 to 16 carbon atoms such as octyl sulfate, decyl sulfate, dodecyl sulfate, tetradecyl sulfate, hexadecyl sulfate, and the like, and 2) polyoxyethylene. Octylphenyl ether sulfate, polyoxyethylene decyl phenyl ether sulfate, polyoxyethylene dodecyl phenyl ether sulfate, polyoxyethylene tetradecyl phenyl ether sulfate, etc. Oxyethylene alkylphenyl ether sulfate, 3) polyoxyethylene octyl ether sulfate, polyoxyethylene decyl ether sulfate, polyoxyethylene dodecyl ether sulfate, poly Examples thereof include polyoxyethylene alkyl ether sulfates having an alkyl group having 8 to 16 carbon atoms such as xylethylenetetradecyl ether sulfate and polyoxyethylene hexadecyl ether sulfate, among which 8 to 14 carbon atoms. The alkyl sulfate ester salt having a straight-chain alkyl group and a (poly) oxyethylene alkyl phosphate ester salt having 1 to 10 oxyethylene units are preferred.

  In the component B described above, examples of the salt constituting it include alkali metal salts such as sodium salt and potassium salt, alkanolamine salts such as monoethanolamine, diethanolamine, and triethanolamine. Salt is preferable, and sodium salt and potassium salt are more preferable.

  As mentioned above, although B component was demonstrated, as B component, what contains 50 mass% or more of organic sulfonic acid type anionic surfactant and organic phosphoric acid type anionic surfactant in B component in total is preferable, and organic What contains 60 mass% or more of sulfonic acid type | system | group anionic surfactant in B component is more preferable.

  The C component used in the treatment agent of the present invention is a polyglycerin fatty acid ester obtained by esterifying a polyglycerin with a fatty acid and / or an ester-forming compound of a fatty acid. Such polyglycerin fatty acid ester includes 1) a complete ester in which all hydroxyl groups in polyglycerol are completely esterified, and 2) a partial ester in which all of the hydroxyl groups in polyglycerol are partially esterified. The partial ester in which 10 to 85 mol% of the hydroxyl group of the polyglycerol is esterified is preferable, and the partial ester in which 10 to 60 mol% is esterified is more preferable.

  Polyglycerol used as a raw material can be obtained by a dehydration condensation reaction of glycerol in the presence of a catalyst, a ring-opening addition reaction between glycerol and glycidol, or the like. When dehydrating condensation reaction of glycerin in the presence of a catalyst, the resulting polyglycerin partially contains cyclic polyglycerin as a by-product. In the present invention, polyglycerin partially containing such cyclic polyglycerin is also included. It can be used as a raw material. In the present invention, polyglycerin having a condensation degree of 2 to 14 is used, but 3 to 12 is preferably used.

  As fatty acids used as raw materials, 1) saturated aliphatic monocarboxylic acids having 8 to 18 carbon atoms such as caprylic acid, capric acid, lauric acid, palmitic acid, stearic acid, and isostearic acid, and 2) caproleic acid and myristoleic acid , Unsaturated aliphatic monocarboxylic acids having 8 to 18 carbon atoms such as palmitoleic acid and oleic acid, among others, saturated aliphatic monocarboxylic acids having 12 to 18 carbon atoms such as lauric acid, palmitic acid and stearic acid. Acid is preferred.

  Furthermore, as the ester-forming compound of fatty acid used as a raw material, 1) C8-C18 such as methyl caprylate, methyl caprate, methyl laurate, ethyl laurate, methyl palmitate, methyl stearate, ethyl stearate, etc. Lower alkyl esters of saturated aliphatic monocarboxylic acids, 2) lower alkyl esters of unsaturated aliphatic monocarboxylic acids having 8 to 18 carbon atoms such as methyl caproleate, methyl myristoleate, methyl palmitate, methyl oleate, etc. Among them, lower alkyl esters of saturated aliphatic monocarboxylic acids having 12 to 18 carbon atoms such as methyl laurate, ethyl laurate, methyl palmitate, methyl stearate, ethyl stearate and the like are preferable.

  The polyglycerol fatty acid ester described above can be synthesized by a known synthesis method, for example, a synthesis method described in JP-A-5-140037 or JP-A-5-140038. Specific examples of such polyglycerol fatty acid esters are 1) diglycerol monolaurate, diglycerol monomyristate, diglycerol monopalmitate, diglycerol monomyristate, diglycerol monostearate, diglycerol monooleate, Diglycerol monolinoleate, diglycerol dilaurate, diglycerol dimyristate, diglycerol dipalmitate, diglycerol dimyristoleate, diglycerol distearate, diglycerol dioleate, diglycerol dilinoleate, di Glycerol Lauromyriste, Diglycerin Myristpalmitate, Diglycerin Palmito Stearate, Diglycerin Palmito Oleate, Diglycerin Stearopalmitreato, Diglycerin Trilaurate, Diglycerin Lintrimyristate, Diglycerin Tripalmitate, Diglycerin Trimyristoleate, Diglycerin Tristearate, Diglycerin Trioleate, Diglycerin Trilinoleate, Diglycerin Dilauromyristate, Diglycerin Lauromyristylate, Diglycerin Dimyrist palmitate, Diglyceryl myristodipalmitate, Diglycerin dipalmito stearate, Diglycerin palmito distearate, Diglycerin dipalmito oleate, Diglycerine palmito dioleate, Diglycerine distearo palmitoreate, Di Diglycerin partial esters such as glycerin stearodipalmitreato, 2) triglycerin monolaurate, triglycerin monomyristate, triglycerin monopalmitate, Triglycerin monomyristoleate, Triglycerin monostearate, Triglycerin monooleate, Triglycerin monolinoleate, Triglycerin dilaurate, Triglycerin dimyristate, Triglycerin dipalmitate, Triglycerin dimyristate, Triglycerol distearate, Triglycerol dioleate, Triglycerol dilinoleate, Triglycerol lauromyristate, Triglycerol myristole palmitate, Triglycerol palmito stearate, Triglycerol palmitooleate, Triglycerol stearopalmitreato , Triglycerin trilaurate, triglycerin trimyristate, triglycerin tripalmitate, triglycerin trimyristate, triglycerin tri Stearate, Triglycerin Trioleate, Triglycerin Trilinoleate, Triglycerin Dilauromyristate, Triglycerin Laurodimyristate, Triglycerin Dimyrist Palmitate, Triglycerin Myristodipalmitate, Triglycerin Dipalmito Stearate, Examples include triglycerin partial esters such as triglycerin palmito distearate, triglycerin dipalmioleate, triglycerine palmitodiolate, triglycerine distearopalmitreato, and triglyceryl stearodipalmitreate.

  The treating agent of the present invention contains 90% by mass or more of the three components of A component, B component and C component as described above, and 20 to 70% by mass of A component and 15 to 15% of B component. 50% by mass and 10 to 40% by mass of C component are contained, but the total of 3 components is 95% by mass or more, 25 to 60% by mass of A component, and 20 to 20% of B component. It is preferable to contain 40 mass% and 20-30 mass% of C components.

  The treatment agent of the present invention can contain other components in the range of less than 10% by mass in addition to the above-described three components. Examples of such other components include lubricating aids such as animal and vegetable oils, mineral oils, fatty acid esters, and polyalkylene glycols, antifoaming agents, preservatives, colorants, and viscosity modifiers.

  As described above, the treatment agent of the present invention comprises a component A, a component B and a component C in a predetermined ratio, and in particular, the pH of the 1% by mass aqueous liquid is in the range of 6-9. Are preferred.

  Examples of the synthetic fiber for manufacturing a nonwoven fabric to which the treatment agent of the present invention is applied include polyester fiber, polyamide fiber, polyacrylonitrile fiber, polyolefin fiber, and composite synthetic fiber using two or more of these. In particular, polyethylene fibers, polypropylene fibers, polybutene fibers, composite fibers having a core-sheath structure, and a sheath part of which is a polyolefin fiber, for example, a polyethylene / polypropylene composite fiber having a sheath part of polyethylene fiber, a polyethylene / polyester composite Polyolefin fibers such as fibers are preferred.

  Next, a method for treating a synthetic fiber for producing a nonwoven fabric according to the present invention (hereinafter simply referred to as a treatment method of the present invention) will be described. In the treatment method of the present invention, the treatment agent of the present invention described above is made into a 0.1 to 15% by mass aqueous liquid, and the aqueous liquid is used as the treatment agent for synthetic fibers for producing nonwoven fabrics in an amount of 0.1 to 0. This is a treatment method for adhering to 8 mass%. Examples of the adhesion method include a dipping method, a spray method, a roller lubrication method, a lubrication method such as a guide lubrication method using a metering pump, and the adhesion process includes a spinning process, a stretching process, and further each stretched process. Although a process etc. are mentioned, Especially just before a crimping process is preferable. The synthetic fiber to which the treatment agent of the present invention is adhered is usually subjected to drying and heat treatment at 60 to 120 ° C. for 5 to 30 minutes immediately after adhesion.

  Finally, the synthetic fiber for producing nonwoven fabric according to the present invention will be described. The synthetic fiber for producing nonwoven fabric according to the present invention is a synthetic fiber for producing nonwoven fabric obtained by the treatment method of the present invention described above. As the synthetic fiber for producing a nonwoven fabric, the above-described polyolefin fiber is preferable, and among them, a polyolefin fiber having a single fiber fineness of 10 dtex or less, more specifically 0.5 to 7 dtex is preferable.

  The synthetic fiber for producing a nonwoven fabric according to the present invention is used in various known fields. This includes, for example, diapers (paper diapers, diaper covers), sanitary products (napkins, tampons), emergency supplies (gauze, first-aid bandages, cotton swabs), cleaning products (wet tissue, cosmetic cotton, breast milk pads), towels, masks, etc. Examples include sanitary materials.

  According to the treatment agent and the treatment method of the present invention, it can sufficiently cope with the recent increase in the production speed of nonwoven fabrics. Specifically, in the production of nonwoven fabrics, it can be obtained at the same time as imparting excellent card passing properties to the synthetic fibers used. It is possible to impart excellent uniformity of formation to the resulting card web and to impart excellent initial hydrophilicity and durable hydrophilicity to the resulting nonwoven fabric.

Test category 1 (Preparation of aqueous treatment solution)
-Preparation of aqueous solution of treatment agent (P-1) of Example 1 20 g of the following nonionic surfactant (A-1), 15 g of nonionic surfactant (A-4), nonionic surfactant (A -7) 10 g, 30 g of organic sulfonic acid anionic surfactant (B-1) and 25 g of polyglycerin fatty acid ester (C-1) were mixed with 100 g of hot water at 50 ° C. and uniformly dissolved, then cooled to room temperature. Then, a 50% by mass aqueous solution of the treating agent (P-1) of Example 1 was prepared.
Nonionic surfactant (A-1): α-tetracontyl-ω-hydroxy-poly (oxyethylene) (n = 50, n is the number of oxyethylene units, the same applies hereinafter)
Nonionic surfactant (A-4): α-hexadecyl-ω-hydroxy-poly (oxyethylene) (n = 10)
Nonionic surfactant (A-7): α-octadecenoyl-ω-octadecenoyloxy-poly (oxyethylene) (n = 9)
Organic sulfonic acid anionic surfactant (B-1): sodium dodecylbenzenesulfonate polyglycerin fatty acid ester (C-1): polyglycerin (condensation degree 4) monostearate

Preparation of aqueous solutions of treatment agents (P-2) to (P-22) of Examples 2 to 22 and treatment agents (R-1) to (R-16) of Comparative Examples 1 to 16 Treatment of Example 1 Similarly to the aqueous liquid of the agent (P-1), the treatment agents (P-2) to (P-22) of Examples 2 to 22 and the treatment agents of Comparative Examples 1 to 16 described in Tables 1 to 3 ( A 50% aqueous solution of (R-1) to (R-16) was prepared.

In Tables 1-3,
* 1: Total ratio (mass%) of component A, component B and component C in the treatment agent
* 2: In the component A, poly in which R ^{1 in} Chemical Formula ¹ is an alkyl group having 30 to 50 carbon atoms, R ² is a hydrogen atom, X is an oxygen atom, and Y is 10 to 90 oxyethylene units. Proportion (% by mass) of nonionic surfactant represented by Chemical formula 1 in the case of a residue obtained by removing all hydroxyl groups from polyethylene glycol having an oxyethylene group
* 3: Total proportion of organic sulfonic acid anionic surfactant and organic phosphoric anionic surfactant in component B (% by mass)
* 4: Ratio of organic sulfonic acid anionic surfactant in component B (% by mass)

A-1: α-Tetracontyl-ω-hydroxy-poly (oxyethylene) (n = 50)
A-2: α-triacontyl-ω-hydroxy-poly (oxyethylene) (n = 30)
A-3: α-pentacontyl-ω-hydroxy-poly (oxyethylene) (n = 75)
A-4: α-hexadecyl-ω-hydroxy-poly (oxyethylene) (n = 10)
A-5: α-Tetracontyl-ω-acetyloxy-poly (oxyethylene oxypropylene) (n = 50, m = 10)
A-6: α-tetracontyl-ω-butanoyloxy-poly (oxypropylene) (m = 15)
A-7: α-octadecenoyl-ω-octadecenoyloxy-poly (oxyethylene) (n = 9)
A-8: α-dodecyl-ω-octanoyloxy-poly (oxyethylene) (n = 15)
A-9: α-nonylphenyl-ω-hydroxy-poly (oxyethylene) (n = 10)
A-10: 1 mol of sorbitan monooleate added with 15 mol of ethylene oxide A-11: 1 mol of castor oil added with 9 mol of ethylene oxide and 9 mol of propylene oxide A-12: hardened castor oil 1 30 moles of ethylene oxide added to a mole A-13: 1 mole of an alkylene oxide adduct obtained by adding 20 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of trimethylolpropane partially esterified with 2 moles of stearic acid A-14: 1 mole of an alkylene oxide adduct obtained by adding 20 moles of ethylene oxide and 4 moles of propylene oxide to 1 mole of pentaerythritol is completely esterified with 4 moles of isostearic acid. A-15: N, N-bis [poly (Oxyethylene) ( = 4)] octadecanamide a-1: polyethylene glycol having a number average molecular weight 400

B-1: Sodium dodecylbenzenesulfonate B-2: Sodium tetradecansulfonate B-3: 1,2-bis (dioctyloxycarbonyl) -ethanesulfonate sodium B-4: Octyl phosphate ester = potassium B-5: Isotridecyl phosphate ester = potassium B-6: Polyoxyethylene (n = 5) dodecyl ether phosphate ester = potassium B-7: Polyoxyethylene (n = 4) nonylphenyl ether phosphate ester = potassium B-8 : Dodecyl sulfate = sodium B-9: dodecyl sulfate polyoxyethylene (n = 3) = sodium B-10: nonylphenyl polyoxyethylene sulfate (n = 5) = triethanolamine

C-1: Polyglycerol (condensation degree 4) monostearate C-2: Polyglycerol (condensation degree 6) dipalmitate C-3: Polyglycerol (condensation degree 2) dioleate

D-1: Stearyl stearate D-2: Mineral oil whose viscosity at 30 ° C. is 320 × 10 ⁻⁵ m ² / s D-3: From the ratio of oxyethylene unit / oxypropylene unit = 20/80 (molar ratio) A polyalkylene glycol having a number average molecular weight of 6000

Test category 2 (Attachment and evaluation of treatment agent to polyolefin fiber for nonwoven fabric production)
-Adhesion of treatment agent to polyolefin fiber for nonwoven fabric production Table 1 and Table 2 show polyolefin composite fiber cotton (2.0 denier x 51 mm cut length) whose sheath is polyethylene and whose core is polyester The aqueous solution was diluted with water to immerse it in a treatment bath (bath temperature 25 ° C., bath ratio 1:30) so that the bath concentration reached the target adhesion amount, and centrifuged and dehydrated at a drawing rate of 50 mass%. Then, it blow-dried at 60 degreeC x 60 minutes, and was set as the processing cotton for the following evaluation. The amount of treatment agent attached to the treated cotton was measured by extracting the treated cotton with a methanol / benzene = 50/50 (volume ratio) mixed solvent using a Soxhlet extractor. The evaluation results and measurement results are summarized in Table 4.

・ Evaluation of scum and fry 2000 g of the treated cotton obtained above was conditioned at a temperature and humidity of 25 ° C. × 60% RH for 24 hours, and after opening with a spreader under the same conditions, a small roller card (one pile type) ) To prepare a card web. The scum was evaluated for the stain on the needle cloth by the following evaluation criteria, and the fly was evaluated by the following evaluation criteria by setting a black screen on the side of the small roller card. The results are summarized in Table 4. The smaller the scum and fly, the better the card passing property and the better the operability.

.. Evaluation criteria for scum ◎: No scum is observed on the needle cloth ○: Slight scum is observed on the needle cloth △: Slightly more scum is observed on the needle cloth ×: Scum is accumulated on the needle cloth, Need to be cleaned

・ ・ Evaluation criteria of fly ◎: Fly is not recognized at all ○: Fly is slightly recognized △: Fly is slightly observed ×: Fly is recognized a lot, and cleaning is necessary

Evaluation of card web texture uniformity A card web having a basis weight of 24 g / m ² was prepared under the same conditions as in the scum and fly evaluation, and the texture uniformity was evaluated according to the following evaluation criteria.
・ ・ Evaluation criteria for card web texture uniformity ◎: No spots at all, uniform ○: Slight spots are observed, but no problem △: Spots can be confirmed a little, but slightly problematic ×: Wide range Can clearly see spots, not a product

・ Evaluation of initial hydrophilicity A sample of 20 cm × 20 cm in size was prepared from the card web, placed on an inclined plate fixed at 45 degrees, and a water droplet of 0.4 ml from a height of 10 mm from the sample surface. Was dropped. The distance from the dropping point of the water droplet to the point where the water droplet was completely absorbed was measured and evaluated according to the following evaluation criteria.
・ ・ Evaluation criteria for initial hydrophilicity ◎: Distance to absorption point is less than 15 mm ○: Distance to absorption point is 15 mm or more and less than 30 mm △: Distance to absorption point is 30 mm or more and less than 40 mm ×: Distance to absorption point 40mm or more

・ Evaluation of durable hydrophilicity Prepare a sample of size 10cm x 10cm from the above card web, place this sample horizontally, and drop one drop of 0.4ml water from 10mm height from the sample surface to 20 places. The number of water droplets absorbed within 2 seconds was measured. After the measurement, the sample was dried at 40 ° C. for 90 minutes, and the same measurement operation was repeated again. The number of repetitions in which the number of absorbed water drops was less than 5 was determined and evaluated according to the following criteria.
.. Evaluation criteria for durable hydrophilicity ◎: Repeat count 10 times or more ○: Repeat count 6-9 times △: Repeat count 3-5 times ×: Repeat count 2 times or less

-Long-term storage evaluation After preparing a sample of the same size from the above card web and storing it at 40 ° C for one month, the initial hydrophilicity and durable hydrophilicity were similarly evaluated using the stored sample. .

In Table 4,
Adhesion amount: Adhesion amount of treatment agent to polyolefin-based composite fiber cotton (% by mass)
pH: pH of 1% aqueous solution of treatment agent
Uniformity: Card web texture uniformity

Claims (10)

A processing agent for synthetic fibers for producing nonwoven fabrics, which contains 90% by mass or more of the following A component, B component and C component in total, 20 to 70% by mass of the A component, and 15 components of B. The processing agent characterized by containing -50 mass% and 10-40 mass% of this C component.
Component A: one or two or more selected from the following nonionic surfactants represented by the following chemical formula 1, the following nonionic surfactant D, and the following nonionic surfactant E

(In chemical formula 1,
R ¹ : an aliphatic hydrocarbon group having 8 to 50 carbon atoms or an alkylphenyl group having an alkyl group having 8 to 18 carbon atoms R ² : a hydrogen atom or an acyl group having 1 to 22 carbon atoms X: an oxygen atom or a carbonyloxy group Y: Residue obtained by removing all hydroxyl groups from polyalkylene glycol having a polyoxyalkylene group composed of a total of 5 to 100 oxyethylene units and / or oxypropylene units Nonionic surfactant D: The following alkylene oxide What is chosen from the adduct J and the following alkylene oxide adduct K Alkylene oxide adduct J: From the partial ester compound of a 3-6 valent aliphatic alcohol and a C8-C18 fatty acid, castor oil and hydrogenated castor oil Alkylene oxide in which ethylene oxide and / or propylene oxide is added to the selected one Side adduct Alkylene oxide adduct K: A product obtained by esterifying an alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to a trivalent to hexavalent aliphatic alcohol with a fatty acid having 8 to 18 carbon atoms. Nonionic surfactant E: An alkylene oxide adduct obtained by adding ethylene oxide and / or propylene oxide to an aliphatic amide having an acyl group having 8 to 18 carbon atoms. B component: the following organic sulfonic acid anionic surfactant, the following organic phosphoric acid type. One or more selected from anionic surfactants and the following organic sulfate anionic surfactants Organic sulfonic acid anionic surfactants: alkyl sulfonates having 8 to 16 carbon atoms, 8 to 12 carbon atoms Alkylbenzenesulfonate having an alkyl group and 4 to 1 carbon atoms Selected from 1,2-bis (dialkyloxycarbonyl) -ethanesulfonate having an alkyl group of organic phosphate-based anionic surfactant: alkyl phosphate ester salt having a linear alkyl group having 8 to 14 carbon atoms , Alkyl phosphate ester salt having a branched alkyl group having 8 to 24 carbon atoms, polyoxyethylene alkyl ether phosphate salt having an alkyl group having 8 to 16 carbon atoms, and polyoxy having an alkyl group having 8 to 12 carbon atoms Those selected from ethylene alkylphenyl ether phosphates Organic sulfate anionic surfactants: alkyl sulfate esters having 8 to 16 carbon atoms, polyoxyethylene alkylphenyl ether sulfates having an alkyl group having 8 to 12 carbon atoms Poly having a salt and an alkyl group having 8 to 16 carbon atoms Those selected from oxyethylene alkyl ether sulfate ester C component: polyglycerin having a condensation degree of 2 to 14, aliphatic monocarboxylic acid having 8 to 18 carbon atoms and / or aliphatic monocarboxylic acid having 8 to 18 carbon atoms Polyglycerol fatty acid ester obtained by esterification reaction with ester-forming compound A component is a polyoxyethylene group composed of oxyethylene units in which R ^{1 in} Chemical Formula ¹ is an alkyl group having 30 to 50 carbon atoms, R ² is a hydrogen atom, X is an oxygen atom and Y is 10 to 90. The treatment agent according to claim 1, wherein the component A contains a nonionic surfactant represented by Chemical Formula 1 in the case where the residue is a residue obtained by removing all hydroxyl groups from polyethylene glycol.   The treatment agent according to claim 1 or 2, wherein the B component contains 50 mass% or more of the organic sulfonic acid anionic surfactant and the organic phosphate anionic surfactant in total in the B component.   The treatment agent according to any one of claims 1 to 3, wherein the component B contains 60% by mass or more of an organic sulfonic acid anionic surfactant in the component B.   C component is an esterification reaction of polyglycerin having a degree of condensation of 3 to 12, and a saturated aliphatic monocarboxylic acid having 12 to 18 carbon atoms and / or a lower alkyl ester of a saturated aliphatic monocarboxylic acid having 12 to 18 carbon atoms. The treatment agent according to any one of claims 1 to 4, which is a polyglycerol fatty acid ester.   Contains 95% by mass or more of A component, B component and C component, and contains 25 to 60% by mass of A component, 20 to 40% by mass of B component, and 20 to 30% by mass of C component. The treatment agent according to any one of claims 1 to 5.   The treatment agent according to any one of claims 1 to 6, wherein the pH of the 1 mass% aqueous liquid is in the range of 6 to 9.   It is a processing method of the synthetic fiber for nonwoven fabric manufacture, Comprising: The processing agent of any one of Claims 1-7 is made into 0.1-15 mass% aqueous liquid, and this aqueous liquid is synthesize | combined for nonwoven fabric manufacture. A treatment method comprising adhering to a fiber so that the treatment agent is 0.1 to 0.8% by mass.   The processing method according to claim 8, wherein the synthetic fiber is a polyolefin-based fiber. The synthetic fiber for nonwoven fabric manufacture obtained by the processing method of Claim 8 or 9.