CN111356804A - Treating agent for polyolefin nonwoven fabric, polyolefin synthetic fiber, and method for treating polyolefin synthetic fiber - Google Patents

Treating agent for polyolefin nonwoven fabric, polyolefin synthetic fiber, and method for treating polyolefin synthetic fiber Download PDF

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CN111356804A
CN111356804A CN201980005708.7A CN201980005708A CN111356804A CN 111356804 A CN111356804 A CN 111356804A CN 201980005708 A CN201980005708 A CN 201980005708A CN 111356804 A CN111356804 A CN 111356804A
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polyolefin
carbon atoms
mass
nonwoven fabric
ether
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CN201980005708.7A
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CN111356804B (en
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金子一辉
武田佳典
森田昌武
小室利广
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Takemoto Oil and Fat Co Ltd
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Takemoto Oil and Fat Co Ltd
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10Treating 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
    • D06M13/224Esters of carboxylic acids; Esters of carbonic acid
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282Addition polymers
    • D04H1/4291Olefin series
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244Treating 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
    • D06M13/248Treating 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 sulfur
    • D06M13/256Sulfonated compounds esters thereof, e.g. sultones
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244Treating 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
    • D06M13/248Treating 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 sulfur
    • D06M13/262Sulfated compounds thiosulfates
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244Treating 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
    • D06M13/282Treating 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
    • D06M13/292Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/53Polyethers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16Synthetic fibres, other than mineral fibres
    • D06M2101/18Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/20Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00Physical properties
    • D10B2401/02Moisture-responsive characteristics
    • D10B2401/022Moisture-responsive characteristics hydrophylic

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The treating agent for polyolefin nonwoven fabrics is characterized by containing 30-98 mass% of a specific ether ester compound, 1-50 mass% of a specific polyoxyalkylene alkyl ether, and 1-50 mass% of a specific long-chain alkyl phosphate salt, when the total content of the specific ether ester compound, the specific polyoxyalkylene alkyl ether, and the specific long-chain alkyl phosphate salt is 100 mass%.

Description

Treating agent for polyolefin nonwoven fabric, polyolefin synthetic fiber, and method for treating polyolefin synthetic fiber
Technical Field
The present invention relates to a treating agent for polyolefin nonwoven fabrics, which can impart excellent initial hydrophilicity and durable hydrophilicity, particularly initial hydrophilicity and durable hydrophilicity after long-term storage, to polyolefin synthetic fibers, and has good emulsion stability and nonwoven fabric permeability. The present invention further relates to a polyolefin synthetic fiber to which the treating agent is attached, and a method for treating a polyolefin synthetic fiber in which the treating agent is attached to a polyolefin synthetic fiber.
Background
In general, as a sanitary product such as a disposable diaper, a product in which the surface of a highly absorbent polymer is covered with polyolefin synthetic fibers for absorbing body fluid is known. Synthetic fibers covering the surface of a highly absorbent polymer are particularly required to have initial hydrophilicity for rapidly absorbing body fluids and durable hydrophilicity for rapidly and repeatedly absorbing body fluids. Therefore, a treatment agent for polyolefin nonwoven fabric containing a surfactant or the like may be applied to the surface of the polyolefin synthetic fiber to meet the demand.
Conventionally, a polyolefin-based treatment agent for nonwoven fabric disclosed in patent document 1 is known. Patent document 1 discloses a polyolefin-based nonwoven fabric treatment agent containing a water-soluble polymer, an alkyl phosphate ester salt, and an ester obtained by chain-capping at least 1 hydroxyl group of a condensate of a polyoxyalkylene group-containing hydroxy fatty acid polyol ester and a dicarboxylic acid with a fatty acid.
Documents of the prior art
Patent document
Patent document 1: japanese patent application laid-open No. 2010-31407
Disclosure of Invention
Problems to be solved by the invention
However, conventional treating agents for polyolefin nonwoven fabrics cannot sufficiently satisfy all of the functions of initial hydrophilicity and durable hydrophilicity, emulsion stability, and nonwoven fabric permeability required for polyolefin fibers hydrophilized with the treating agents.
The present invention addresses the problem of providing a treating agent for polyolefin-based nonwoven fabrics, a polyolefin-based synthetic fiber, and a method for treating polyolefin-based synthetic fibers, which can impart excellent initial hydrophilicity and durable hydrophilicity to polyolefin-based fibers, and in particular can impart initial hydrophilicity and durable hydrophilicity after long-term storage, and which have good emulsion stability and nonwoven fabric permeability.
Means for solving the problems
The present inventors have conducted studies to solve the above problems and found that a treating agent for polyolefin nonwoven fabrics, which contains a specific ether ester compound, a specific polyoxyalkylene alkyl ether and a specific long-chain alkyl phosphate salt at specific ratios, is suitable.
In order to achieve the above object, one aspect of the present invention provides a treating agent for polyolefin nonwoven fabric, wherein the treating agent for polyolefin nonwoven fabric comprises 30 to 98% by mass of the ether ester compound, 1 to 50% by mass of the polyoxyalkylene alkyl ether, and 1 to 50% by mass of the long-chain alkyl phosphate salt, assuming that the total content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate salt in the treating agent for polyolefin nonwoven fabric is 100% by mass.
The ether ester compound is obtained by adding 1 to 500 moles of alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a polyhydric alcohol and a monohydric fatty acid X, and condensing the resulting compound with a monohydric fatty acid Y having 6 to 26 carbon atoms.
A polyoxyalkylene alkyl ether is a compound obtained by adding 30 to 300 moles of at least one selected from the group consisting of ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms.
The long-chain alkyl phosphate salt is at least one selected from the group consisting of an alkali metal salt of a long-chain alkyl phosphate having an alkyl group having 8 to 22 carbon atoms in the molecule, and an alkali metal salt of a long-chain alkyl phosphate having a polyoxyalkylene group having 2 to 4 carbon atoms and an alkyl group having 8 to 12 carbon atoms in the molecule.
The ether ester compound is preferably a compound obtained by adding 1 to 200 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monohydric fatty acid X having 10 to 26 carbon atoms and condensing the resulting compound with a monohydric fatty acid Y having 6 to 26 carbon atoms.
The ether ester compound is preferably a compound obtained by adding 10 to 100 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monohydric fatty acid X having 10 to 26 carbon atoms and condensing the resulting compound with a monohydric fatty acid Y having 6 to 26 carbon atoms.
The ether ester compound is preferably a compound obtained by condensing a C6-26 monobasic fatty acid Y in a ratio of 2 to 3 moles with respect to 1 mole of a compound obtained by adding 10 to 100 moles of a C2-4 alkylene oxide to 1 mole of an ester compound of a C2-6 polyol and a C10-26 monobasic fatty acid X.
Preferably, the polyoxyalkylene alkyl ether is a compound obtained by adding 50 to 150 moles of ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms, wherein when the total molar ratio of ethylene oxide and propylene oxide added in the molecule of the polyoxyalkylene alkyl ether is 100 mol%, ethylene oxide is more than 0 mol% and 50 mol% or less, and propylene oxide is 50 mol% or more and less than 100 mol%.
The long-chain alkyl phosphate ester salt is preferably at least one selected from the group consisting of an alkali metal salt of a long-chain alkyl phosphate having an alkyl group having 8 to 12 carbon atoms in the molecule, and an alkali metal salt of a long-chain alkyl phosphate having a polyoxyalkylene group consisting of oxyalkylene groups having 1 to 10 carbon atoms and an alkyl group having 8 to 12 carbon atoms in the molecule.
In the polyolefin-based nonwoven fabric treating agent, it is preferable that the ether ester compound is contained in an amount of 40 to 85% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 5 to 30% by mass, and the long-chain alkyl phosphate salt is contained in an amount of 3 to 30% by mass, when the total content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate salt is 100% by mass.
The treating agent for polyolefin nonwoven fabrics preferably further contains at least one anionic surfactant selected from the group consisting of short-chain alkyl phosphate salts, sulfonates and sulfates having a linear or branched alkyl group having 2 to 7 carbon atoms in the molecule.
In the treating agent for polyolefin-based nonwoven fabrics, it is preferable that the ether ester compound is contained in an amount of 30 to 93% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 1 to 50% by mass, the long-chain alkyl phosphate is contained in an amount of 1 to 50% by mass, and the anionic surfactant is contained in an amount of 5 to 30% by mass, provided that the total content ratio of the ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate and the anionic surfactant is 100% by mass.
In another aspect of the present invention, there is provided a polyolefin synthetic fiber, wherein the treating agent for polyolefin nonwoven fabric is attached.
In another aspect of the present invention, there is provided a method for treating polyolefin synthetic fibers, wherein the treating agent for polyolefin nonwoven fabrics is attached to the polyolefin synthetic fibers at a ratio of 0.05 to 3% by mass.
The adhesion of the treating agent for polyolefin nonwoven fabric to the polyolefin synthetic fibers is preferably performed by diluting the treating agent for polyolefin nonwoven fabric with water and adhering an aqueous liquid having a concentration of the obtained treating agent for polyolefin nonwoven fabric of 0.5 to 20 mass% to the polyolefin synthetic fibers in a proportion of 0.1 to 1 mass% in terms of the amount of the treating agent for polyolefin nonwoven fabric.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, excellent initial hydrophilicity and durable hydrophilicity, particularly after long-term storage, can be imparted to polyolefin fibers, and emulsion stability and nonwoven fabric permeability can be improved.
Detailed Description
(embodiment 1)
First, embodiment 1 of a polyolefin nonwoven fabric treatment agent (hereinafter, also simply referred to as a treatment agent) embodying the present invention will be described. The treating agent of the present embodiment contains the following ether ester compound, the following polyoxyalkylene alkyl ether, and the following long-chain alkyl phosphate ester salt at predetermined ratios. That is, when the total content ratio of the 3 components is 100% by mass, the treating agent contains the ether ester compound in a ratio of 30 to 98% by mass, the polyoxyalkylene alkyl ether in a ratio of 1 to 50% by mass, and the long-chain alkyl phosphate salt in a ratio of 1 to 50% by mass.
The ether ester compound is obtained by adding 1 to 500 moles of alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a polyhydric alcohol and a monohydric fatty acid X, and condensing the resulting compound with a monohydric fatty acid Y having 6 to 26 carbon atoms. These ether ester compounds may be used alone in 1 kind, or may be used in combination in 2 or more kinds.
The polyoxyalkylene alkyl ether is a compound obtained by adding 30 to 300 moles of at least one selected from ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms. These polyoxyalkylene alkyl ethers may be used alone in 1 kind, or may be used in combination in 2 or more kinds.
The long-chain alkyl phosphate salt is at least one selected from the group consisting of an alkali metal salt of a long-chain alkyl phosphate having an alkyl group having 8 to 22 carbon atoms in the molecule, and an alkali metal salt of a long-chain alkyl phosphate having a polyoxyalkylene group having 2 to 4 carbon atoms and an alkyl group having 8 to 12 carbon atoms in the molecule. These long-chain alkyl phosphate salts may be used alone in 1 kind, or may be used in combination in 2 or more kinds.
Specific examples of the ether ester compound used in the treatment agent of the present embodiment include polyoxyethylene (15 mol: which represents the number of moles of alkylene oxide added, the same applies hereinafter) polyoxypropylene (6 mol) castor oil trilaurate, a condensate of a polyoxyethylene (20 mol) adduct of an ester of sorbitan and 12-hydroxystearic acid and lauric acid, polyoxyethylene (28 mol) hardened castor oil trioleate, polyoxyethylene (30 mol) polyoxypropylene (12 mol) hardened castor oil tristearate, a condensate of a polyoxyethylene (13 mol) adduct of an ester of glycerin and ricinoleic acid and lauric acid, polyoxyethylene (28 mol) hardened castor oil trilaurate, a condensate of a polyoxyethylene (32 mol) adduct of an ester of ethylene glycol and 12-hydroxystearic acid and oleic acid, and the like.
Specific examples of the polyhydric alcohol constituting the ether ester used in the treating agent of the present embodiment include ethylene glycol, propylene glycol, 1, 3-propanediol, 1, 2-butanediol, 1, 3-butanediol, 1, 4-butanediol, 2-methyl-1, 2-propanediol, 1, 5-pentanediol, 1, 6-hexanediol, 2, 5-hexanediol, 2-methyl-2, 4-pentanediol, 2, 3-dimethyl-2, 3-butanediol, glycerin, 2-methyl-2-hydroxymethyl-1, 3-propanediol, 2-ethyl-2-hydroxymethyl-1, 3-propanediol, sorbitan, pentaerythritol, and mixtures thereof, Sorbitol, and the like.
Specific examples of the monobasic fatty acid X constituting the ether ester used in the treatment agent of the present embodiment include octanoic acid, 2-ethylhexanoic acid, decanoic acid, dodecanoic acid, tridecanoic acid, isotridecanoic acid, hexadecanoic acid, octadecanoic acid, isostearic acid, hydroxyoctadecanoic acid, octadecenoic acid, hydroxyoctadecenoic acid, octadecadienoic acid, octadecatrienoic acid, and behenic acid.
Specific examples of the monobasic fatty acid Y having 6 to 26 carbon atoms constituting the ether ester used in the treatment agent of the present embodiment include caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, tridecanoic acid, isotridecanoic acid, palmitic acid, stearic acid, isostearic acid, 12-hydroxyoctadecanoic acid, octadecenoic acid, octadecadienoic acid, octadecatrienoic acid, behenic acid, and hexacosanoic acid.
Specific examples of the polyoxyalkylene alkyl ether used in the treating agent of the present embodiment include a polyoxyethylene (20 mol) polyoxypropylene (85 mol) random adduct of propylene glycol, a polyoxyethylene (42 mol) polyoxypropylene (96 mol) block adduct of n-butanol, a polyoxyethylene (18 mol) polyoxypropylene (74 mol) block adduct of trimethylolpropane, a polyoxyethylene (27 mol) polyoxypropylene (32 mol) block adduct of isododecanol, a polyoxyethylene (26 mol) polyoxypropylene (80 mol) random adduct of sorbitan, a polyoxyethylene (32 mol) polyoxypropylene (57 mol) random adduct of stearyl alcohol, and the like.
Specific examples of the long-chain alkyl phosphate salt used in the treatment agent of the present embodiment include octyl phosphate alkali metal salt, isooctyl phosphate alkali metal salt, 2-ethylhexyl phosphate alkali metal salt, decyl phosphate alkali metal salt, dodecyl phosphate alkali metal salt, tridecyl phosphate alkali metal salt, myristyl phosphate alkali metal salt, hexadecyl phosphate alkali metal salt, stearyl phosphate alkali metal salt, eicosyl phosphate alkali metal salt, docosyl phosphate alkali metal salt, polyoxyethylene (20 mol) octyl ether phosphate alkali metal salt, polyoxyethylene (3 mol) isooctyl ether phosphate alkali metal salt, polyoxyethylene (3 mol) polyoxypropylene (6 mol) -2-ethylhexyl ether phosphate alkali metal salt, polyoxyethylene (2 mol) decyl ether phosphate alkali metal salt, polyoxyethylene (3 mol) decyl ether phosphate alkali metal salt, polyoxyethylene (2 mol) dodecyl ether phosphate alkali metal salt, polyoxyethylene (3 mol) polyoxyethylene (6 mol) -2-, Polyoxyethylene (2 mol) polyoxypropylene (6 mol) decyl ether phosphate alkali metal salt, and the like.
Specific examples of the alkali metal salt include sodium salt and potassium salt.
Specific examples of the alkali metal salt of an alkyl phosphate include a monoester, a diester and a mixture of a monoester and a diester. In addition, a diester body having the same alkyl group (symmetric diester) and a diester body having a different alkyl group (asymmetric diester) are present in the diester body.
The ether ester compound used in the treatment agent of the present embodiment is preferably a compound obtained by adding 1 to 200 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monohydric fatty acid X having 10 to 26 carbon atoms and condensing the resulting compound with a monohydric fatty acid Y having 6 to 26 carbon atoms. More preferably, the alkylene oxide is a compound obtained by adding 10 to 100 moles of alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monobasic fatty acid X having 10 to 26 carbon atoms and condensing the resulting compound with a monobasic fatty acid Y having 6 to 26 carbon atoms. The ether ester compound is preferably a compound obtained by condensing a C6-26 monobasic fatty acid Y at a ratio of 2-3 moles with respect to 1 mole of a compound obtained by adding 10-100 moles of a C2-4 alkylene oxide to 1 mole of an ester compound of a C2-6 2-4-membered alcohol and a C10-26 monobasic fatty acid X. With this configuration, more excellent initial hydrophilicity and durable hydrophilicity can be provided. In particular, initial hydrophilicity and durable hydrophilicity which are not easily reduced even after long-term storage can be imparted.
The polyoxyalkylene alkyl ether used in the treating agent of the present embodiment is preferably a compound obtained by adding 50 to 150 moles in total of ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms, wherein when the total molar ratio of the ethylene oxide and the propylene oxide in the molecule of the polyoxyalkylene alkyl ether is 100 mol%, the ethylene oxide is more than 0 mol% and 50 mol% or less, and the propylene oxide is 50 mol% or more and less than 100 mol%. With this configuration, more excellent initial hydrophilicity and durable hydrophilicity can be provided. In particular, initial hydrophilicity and durable hydrophilicity which are not easily reduced even after long-term storage can be imparted.
The long-chain alkyl phosphate salt used in the treatment agent of the present embodiment is preferably at least one selected from the group consisting of an alkali metal salt of a long-chain alkyl phosphate having an alkyl group having 8 to 12 carbon atoms in the molecule, and an alkali metal salt of a long-chain alkyl phosphate having a polyoxyalkylene group having 1 to 10 carbon atoms and 2 to 3 oxyalkylene groups and an alkyl group having 8 to 12 carbon atoms in the molecule. With this configuration, more excellent initial hydrophilicity can be provided. In particular, initial hydrophilicity which is not easily reduced even after long-term storage can be imparted.
In the treating agent of the present embodiment, when the total content ratio of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate is 100% by mass, it is preferable that the ether ester compound is contained in an amount of 40 to 85% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 5 to 30% by mass, and the long-chain alkyl phosphate is contained in an amount of 3 to 30% by mass. This configuration can impart initial hydrophilicity and durable hydrophilicity, which are not easily reduced particularly after long-term storage.
The treatment agent of the present embodiment may further contain at least one anionic surfactant selected from the group consisting of short-chain alkyl phosphate salts having a linear or branched alkyl group having 2 to 7 carbon atoms in the molecule, sulfonate salts, and sulfate salts. These anionic surfactants may be used alone in 1 kind, or may be used in combination in 2 or more kinds. With this configuration, the permeability of the nonwoven fabric can be further improved. The content ratio of the ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate salt, and the anionic surfactant in the treating agent of the present embodiment is not particularly limited. In the treating agent of the present embodiment, when the total content ratio of the ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate salt, and the anionic surfactant is 100% by mass, it is preferable that the ether ester compound is contained in an amount of 30 to 93% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 1 to 50% by mass, the long-chain alkyl phosphate salt is contained in an amount of 1 to 50% by mass, and the anionic surfactant is contained in an amount of 5 to 30% by mass. With this configuration, the permeability of the nonwoven fabric can be further improved. In addition, durable hydrophilicity, which is not easily reduced after long-term storage, can be imparted.
Specific examples of the short-chain alkyl phosphate salts having a linear or branched alkyl group having 2 to 7 carbon atoms in the molecule include ethyl phosphate, propyl phosphate, butyl phosphate, pentyl phosphate, and hexyl phosphate.
Specific examples of the sulfonate include a sodium salt of heptyl sulfonic acid, a sodium salt of 2-ethylhexyl sulfonic acid, a sodium salt of octyl sulfonic acid, a sodium salt of nonyl sulfonic acid, a sodium salt of decyl sulfonic acid, a sodium salt of undecyl sulfonic acid, a sodium salt of dodecyl sulfonic acid, a sodium salt of decyl benzenesulfonic acid, a sodium salt of dodecyl benzenesulfonic acid, a sodium salt of tridecyl benzenesulfonic acid, a sodium salt of tetradecyl benzenesulfonic acid, a sodium salt of pentadecyl benzenesulfonic acid, a sodium salt of hexadecylbenzenesulfonic acid, a sodium salt of hexadecyldiphenyl ether disulfonic acid, a sodium salt of di-2-ethylhexyl sulfosuccinate, a potassium salt of di-2-ethylhexyl sulfosuccinate, a sodium salt of dioctyl sulfosuccinate, a sodium salt of di-dodecyl sulfosuccinate, a potassium salt of di-dodecyl sulfosuccinate, sodium dihexadecyl sulfosuccinate, potassium dihexadecyl sulfosuccinate, and the like.
Specific examples of the sulfate include 4-methylpentyl sulfate sodium salt, octyl sulfate potassium salt, 2-ethylhexyl sulfate sodium salt, isononyl sulfate sodium salt, decyl sulfate potassium salt, 1-methylnonyl sulfate sodium salt, isodecyl sulfate sodium salt, dodecyl sulfate potassium salt, 2-butyloctyl sulfate sodium salt, tetradecyl sulfate sodium salt, pentadecyl sulfate potassium salt, hexadecyl sulfate sodium salt, hexadecyl sulfate potassium salt, heptadecyl sulfate sodium salt, 3, 9-diethyltridecyl-6-yl sulfate sodium salt, octadecyl sulfate potassium salt, polyoxyethylene dodecyl sulfate sodium salt, polyoxyethylene octylphenyl ether sulfate potassium salt, sodium salt of sodium sulfate, sodium polyoxyethylene nonylphenyl ether sulfate, potassium polyoxyethylene nonylphenyl ether sulfate, and the like.
(embodiment 2)
The polyolefin synthetic fiber of the present embodiment is a polyolefin synthetic fiber to which the treating agent of embodiment 1 is attached. As the adhesion method, a known method such as a dipping method, a spraying method, a roll oil feeding method, a carrier oil feeding method using a metering pump, or the like can be applied. Further, a spray method, a roll coater, a gravure coater, a die coater, a curtain coater, or the like may be used.
The polyolefin synthetic fibers are not particularly limited, and examples thereof include polyolefin fibers such as polyethylene fibers, polypropylene fibers, and polybutylene fibers. These can be used alone in 1 kind, also can be combined with more than 2 kinds. Further, the composite fiber may have a core-sheath structure, or may have a polyolefin fiber as one or both of the core and the sheath, for example, a polyethylene/polypropylene composite fiber, a polyethylene/polyester composite fiber, or the like, in which a polyethylene fiber is used as the sheath.
In particular, when the treating agent of embodiment 1 is applied to a polyolefin-based synthetic fiber nonwoven fabric, the nonwoven fabric obtained exhibits further increased effects of durable hydrophilicity and initial hydrophilicity, and thus is preferable. In particular, initial hydrophilicity and durable hydrophilicity which are not easily reduced even after long-term storage can be imparted. The type of nonwoven fabric is not particularly limited, and examples thereof include spunbond nonwoven fabrics, meltblown nonwoven fabrics, and composite nonwoven fabrics of spunbond and meltblown.
(embodiment 3)
The method for treating polyolefin synthetic fibers according to the present embodiment (hereinafter also simply referred to as "treating method") is characterized in that the treating agent according to embodiment 1 is attached to polyolefin synthetic fibers.
The processing method of the present embodiment may further have the following features: the treating agent of embodiment 1 is attached to the polyolefin synthetic fibers in a proportion of 0.05 to 3% by mass based on the treating agent of embodiment 1 without containing a solvent. The amount of the treating agent in the polyolefin synthetic fiber to which the treating agent is attached is 0.05 to 3% by mass.
Examples of the form of the treating agent when the treating agent of embodiment 1 is attached to the synthetic fibers include an organic solvent solution and an aqueous solution.
The processing method of the present embodiment preferably includes: the treating agent of embodiment 1 is diluted with water to prepare an aqueous solution having a treating agent concentration of 0.5 to 20% by mass, and the aqueous solution is attached to the polyolefin synthetic fibers in a proportion of 0.1 to 1% by mass based on the treating agent of embodiment 1 containing no solvent. That is, the adhesion of the treating agent of embodiment 1 to the polyolefin synthetic fibers is preferably performed by diluting the treating agent with water and adhering an aqueous liquid having a concentration of the obtained treating agent of 0.5 to 20 mass% to the polyolefin synthetic fibers in a ratio of 0.1 to 1 mass% in terms of the amount of the treating agent. The amount of the treating agent in the polyolefin synthetic fiber to which the treating agent is attached is 0.1 to 1% by mass.
According to the treating agent, the polyolefin synthetic fiber, and the treating method of the above embodiments, the following effects can be obtained.
(1) In the above embodiment, the treating agent is constituted by containing the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate salt at predetermined ratios. Therefore, excellent initial hydrophilicity and durable hydrophilicity can be imparted to the polyolefin fiber. In particular, initial hydrophilicity and durable hydrophilicity which are not easily reduced even after long-term storage can be imparted. In addition, the emulsion stability of the treatment agent can be improved. Further, the nonwoven fabric of the treating agent can have good permeability.
The above embodiment may be modified as follows.
In the treatment agent of the above embodiment, components generally used in treatment agents, such as a stabilizer, an antistatic agent, a linking agent, an antioxidant, and an ultraviolet absorber, for maintaining the quality of the treatment agent, may be further blended within a range not to impair the effects of the present invention.
[ examples ]
Hereinafter, examples and the like are given to more specifically explain the constitution and effects of the present invention, but the present invention is not limited to these examples. In the following description of examples and comparative examples, parts are parts by mass and% is% by mass.
< test group 1>
Synthesis of Ether ester Compound (A-1)
An ether ester compound (a-1) was obtained by charging 933g (1 mol) of castor oil and 2g of sodium hydroxide as a catalyst into an autoclave, and by pressing a mixture of 660g (15 mol) of ethylene oxide and 348g (6 mol) of propylene oxide into the autoclave to etherify the mixture, and further by esterifying the mixture with 600g (3 mol) of lauric acid as a monobasic fatty acid Y.
The ether ester compounds (A-2), (A-6) to (A-9), (A-15) to (A-20), (A-22) to (A-24), (A-28) to (A-30), (A-33) and (A-34) in Table 3 were synthesized by the same procedure as for the ether ester compound (A-1).
Synthesis of Ether ester Compound (A-3)
62g (1 mol) of ethylene glycol as a polyhydric alcohol and 600g (2 mol) of 12-hydroxystearic acid as a monobasic fatty acid X were charged into a reaction vessel and esterified. The obtained ester compound was charged in an autoclave, and 2g of potassium hydroxide as a catalyst was added. After that, 1408g (32 moles) of ethylene oxide was pressed into the autoclave to perform etherification, and 847g (3 moles) of oleic acid as a monobasic fatty acid Y was further esterified, thereby obtaining an ether ester compound (A-3).
The ether ester compounds (A-4), (A-5), (A-10) to (A-13), (A-21), (A-25) to (A-27), (A-31) and (A-32) in Table 3 were synthesized by the same procedure as for the ether ester compound (A-3). Table 3 shows the kind of polyol, the kind and the condensation mole number of the monobasic fatty acid X, the kind and the addition mole number of the alkylene oxide, and the kind and the condensation mole number of the monobasic fatty acid Y, which are raw materials of the ether ester compounds (A-1) to (A-34).
Synthesis of polyoxyalkylene alkyl ether (B-1)
77g (1 mol) of propylene glycol and 2g of potassium hydroxide as a catalyst were charged into an autoclave, purged with nitrogen, and then heated to 140 ℃. Further, a mixture of 880g (20 mol) of ethylene oxide and 4930g (85 mol) of propylene oxide was pressed into the autoclave for 3 hours to react, thereby synthesizing a polyoxyalkylene alkyl ether (B-1).
Polyoxyalkylene alkyl ethers (B-2) to (B-16) shown in Table 4 were synthesized by the same procedure as for polyoxyalkylene alkyl ether (B-1). Table 4 shows the kind of the aliphatic alcohol, the kind and the number of moles of alkylene oxide added, and the total number of moles of the alkylene oxide added, which are the raw materials of each of the polyoxyalkylene alkyl ethers (B-1) to (B-16).
Table 5 shows the kinds of alkyl groups and alkali metal salts and the kinds and number of polyoxyalkylene groups of the long-chain alkyl phosphate ester salts (C-1) to (C-12) used for the preparation of the treating agent for polyolefin nonwoven fabrics. Table 6 shows the types of anionic surfactants (D-1) to (D-4) used in the preparation of the treating agent for polyolefin nonwoven fabrics.
< test group 2>
Preparation of treating agent for polyolefin nonwoven Fabric (example 1)
28g of an ether ester compound (A-1) as a component A, 7.5g of a polyoxyalkylene alkyl ether (B-1) as a component B, 10.5g of a long-chain alkyl phosphate (C-1) as a component C, and 4g of an anionic surfactant (D-1) as a component D were mixed, and 450g of water was added to obtain a 10 mass% aqueous solution of a treating agent for polyolefin nonwoven fabrics.
Preparation of treating agent for polyolefin nonwoven Fabric (examples 2 to 57 and comparative examples 1 to 15)
A10 mass% aqueous solution of a treating agent for polyolefin nonwoven fabric (examples 2 to 57 and comparative examples 1 to 15) was prepared by the same procedure as in example 1.
The columns of "composition of treating agent" in tables 1 and 2 show the types of ether ester compound (a), polyoxyalkylene alkyl ether (B), long-chain alkyl phosphate ester salt (C), and anionic surfactant (D) used in the preparation of 10 mass% aqueous solution of the treating agent for polyolefin nonwoven fabric in examples 1 to 57 and comparative examples 1 to 15, and the content (%) of each component in the treating agent.
[ Table 1]
Figure BDA0002489901840000121
[ Table 2]
Figure BDA0002489901840000131
[ Table 3]
Figure BDA0002489901840000141
[ Table 4]
Figure BDA0002489901840000151
[ Table 5]
Figure BDA0002489901840000152
[ Table 6]
Species of Contents of anionic surfactants
D-1 N-butyl potassium phosphate salt
D-2 Dodecyl sulfonic acid sodium salt
D-3 Dioctyl sodium sulfosuccinate
D-4 Dodecyl sodium sulfate salt
< test group 3>
Adhesion of treating agent for polyolefin-based nonwoven fabric to polyolefin-based synthetic fiber
The aqueous solutions of the respective treating agents of examples 1 to 57 and comparative examples 1 to 15 thus prepared were further diluted with water to prepare aqueous solutions having a concentration of 0.25% by mass. Using the aqueous solution, a treatment bath (bath temperature 25 ℃ C.) was prepared, and a polypropylene spunbond nonwoven fabric (basis weight 20 g/m) was formed2) The treated nonwoven fabric for evaluation was prepared by immersing the treated nonwoven fabric in a treatment bath for 5 minutes, taking out the treated nonwoven fabric, adjusting the liquid rolling ratio of the treated nonwoven fabric with a liquid rolling machine so that the amount of the aqueous liquid adhering to 2g of the polypropylene spunbond nonwoven fabric was 4g, and then drying the nonwoven fabric with air blowing at 80 ℃ for × 30 minutes, wherein the amount of the treating agent adhering to the treated nonwoven fabric was measured by extracting the treated nonwoven fabric with a mixed solvent of methanol/xylene (50/50 volume ratio) using a Soxhlet extractor, and the measurement results are shown in the columns of "amount of adhering to fiber" in tables 1 and 2.
< test group 4 (evaluation of treating agent for polyolefin nonwoven Fabric) >
Evaluation of initial hydrophilicity (immediately after production of treated nonwoven Fabric for evaluation)
The treated nonwoven fabric for evaluation was cut into pieces of 10cm × 15cm, and the temperature was adjusted in a thermostatic chamber at 20 ℃ and a relative humidity of 60% for 24 hours, 10 sheets of toilet paper were stacked as an absorbent body, and the treated nonwoven fabric for evaluation was disposed thereon, and the treated nonwoven fabric for evaluation and the toilet paper were set on a 45 ℃ inclined plate, and 0.05g of physiological saline at 37 ℃ was dropped from a height of 1cm above the nonwoven fabric.
For one piece of treated nonwoven fabric for evaluation, the flow length from the point of dropping to the end of absorption (i.e., the distance that physiological saline dropped on the nonwoven fabric flows on the surface of the nonwoven fabric until the physiological saline is absorbed by the nonwoven fabric) was measured 5 times, and the initial hydrophilicity of the treated nonwoven fabric immediately after production was evaluated based on the average value thereof by the following evaluation criteria. The evaluation results are shown in tables 1 and 2 in the column "initial hydrophilicity" in the column "immediately after preparation".
Evaluation criterion of initial hydrophilicity
Flow length less than 30mm ◎ (Excellent).
The flow length is 30mm or more and less than 50 mm: ○ (good).
× (bad) when the flow length is 50mm or more.
Evaluation of durable hydrophilicity (immediately after production of treated nonwoven Fabric for evaluation)
The treated nonwoven fabric for evaluation was cut into pieces of 10cm × 25cm, and temperature was adjusted in a thermostatic chamber at 20 ℃ and 60% relative humidity for 24 hours, 10 sheets of toilet paper were stacked as an absorbent body, the treated nonwoven fabric for evaluation was placed thereon, 415g of stainless steel plates having holes of 2cm in diameter were further placed on the nonwoven fabric at equal intervals, 0.05g of physiological saline at 37 ℃ was dropped from a height of 1cm above the nonwoven fabric, the physiological saline was dropped onto the same nonwoven fabric at 20 positions, the number of holes of the portion of the stainless steel plates placed on the nonwoven fabric where the physiological saline dropped was absorbed into the nonwoven fabric within 10 seconds was counted, and then the same measurement was repeated after 3 minutes, and the durable hydrophilicity of the treated nonwoven fabric immediately after production was evaluated based on the result of the 5 th measurement using the following evaluation criteria, and the evaluation results are shown in the column "durable hydrophilicity" immediately after production "of table 1 and table 2.
Evaluation criteria for durable hydrophilicity
The number of holes in the stainless steel sheet on the nonwoven fabric, in which the physiological saline solution dropped therein is absorbed into the nonwoven fabric within 10 seconds, is 18 or more (◎ is preferred).
○ (good) in the number of more than 12 and less than 18.
Less than 12: × (bad).
Evaluation over time (evaluation of initial hydrophilicity and durable hydrophilicity after long-term storage)
The treated nonwoven fabric for evaluation was placed in a thermostat and stored at 70 ℃ for 2 weeks.
The treated nonwoven fabric after the long-term storage was evaluated for initial hydrophilicity and durable hydrophilicity by the same procedure as the above-described evaluation for initial hydrophilicity and durable hydrophilicity using the treated nonwoven fabric after the long-term storage. The evaluation results are shown in tables 1 and 2 in the column "initial hydrophilicity" and the column "durable hydrophilicity" in the column "evaluation over time".
Evaluation of permeability of nonwoven Fabric
The temperature of the nonwoven fabric to which no treatment agent was applied was adjusted in a thermostatic chamber at 20 ℃ and a relative humidity of 60% for 24 hours. 5 μ L of a 1% emulsion (aqueous solution) of each treatment agent was dropped on the nonwoven fabric, and the time until complete permeation was measured, and the permeability of each treatment agent into the nonwoven fabric was evaluated based on the measured value by the following evaluation criteria. The evaluation results are shown in the columns of "nonwoven fabric permeability" in tables 1 and 2.
Evaluation criteria for nonwoven Fabric Permeability
◎ (Excellent) with less than 10 seconds penetration.
○ (good) was infiltrated for 10 seconds or more and less than 60 seconds.
× (bad) with penetration of more than 60 seconds.
Evaluation of emulsion stability
A 10% emulsion (aqueous liquid) of each treatment agent was prepared, and after temperature adjustment was performed in a thermostatic chamber at 20 ℃ and a relative humidity of 60% for 24 hours, the presence or absence of separation of components in the treatment agent was visually confirmed, and the emulsion stability of each treatment agent was evaluated according to the following evaluation criteria. The evaluation results are shown in the columns of "emulsion stability" in tables 1 and 2.
Evaluation criteria for emulsion stability
No separation ◎ (Excellent).
There was separation × (poor).
As is clear from the results in tables 1 and 2, the present invention has the following effects: the polyolefin-based fiber can be imparted with excellent initial hydrophilicity and durable hydrophilicity, and is excellent in emulsifying properties and nonwoven fabric permeability, and the initial hydrophilicity and durable hydrophilicity are not easily reduced even after long-term storage.

Claims (12)

1. A treating agent for polyolefin nonwoven fabrics, characterized in that, assuming that the total content of the ether ester compound, the polyoxyalkylene alkyl ether and the long-chain alkyl phosphate salt in the treating agent for polyolefin nonwoven fabrics is 100% by mass, the ether ester compound is contained in a proportion of 30 to 98% by mass, the polyoxyalkylene alkyl ether is contained in a proportion of 1 to 50% by mass, and the long-chain alkyl phosphate salt is contained in a proportion of 1 to 50% by mass,
ether ester compound: a compound obtained by adding 1 to 500 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a polyhydric alcohol and a monobasic fatty acid X and condensing the resulting compound with a monobasic fatty acid Y having 6 to 26 carbon atoms;
polyoxyalkylene alkyl ether: a compound obtained by adding 30 to 300 moles of at least one selected from the group consisting of ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms in total;
long-chain alkyl phosphate salts: at least one member selected from the group consisting of alkali metal salts of long-chain alkyl phosphates having an alkyl group having 8 to 22 carbon atoms in the molecule, and alkali metal salts of long-chain alkyl phosphates having a polyoxyalkylene group having 2 to 4 carbon atoms and an alkyl group having 8 to 12 carbon atoms in the molecule.
2. The treating agent for polyolefin nonwoven fabrics according to claim 1, wherein the ether ester compound is a compound obtained by adding 1 to 200 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monobasic fatty acid X having 10 to 26 carbon atoms and condensing the obtained compound with a monobasic fatty acid Y having 6 to 26 carbon atoms.
3. The treating agent for polyolefin nonwoven fabrics according to claim 1 or 2, wherein the ether ester compound is a compound obtained by adding 10 to 100 moles of an alkylene oxide having 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 4-membered alcohol having 2 to 6 carbon atoms and a monobasic fatty acid X having 10 to 26 carbon atoms and condensing the resulting compound with a monobasic fatty acid Y having 6 to 26 carbon atoms.
4. The agent for treating polyolefin-based nonwoven fabric according to any one of claims 1 to 3, wherein the ether ester compound is a compound obtained by condensing C6-26 monobasic fatty acid Y at a ratio of 2 to 3 moles with respect to 1 mole of a compound obtained by adding 10 to 100 moles of C2-4 alkylene oxide to 1 mole of an ester compound of C2-6 2-4 polyhydric alcohol and C10-26 monobasic fatty acid X.
5. The agent for treating a polyolefin-based nonwoven fabric according to any one of claims 1 to 4, wherein the polyoxyalkylene alkyl ether is a compound obtained by adding 50 to 150 moles of ethylene oxide and propylene oxide to 1 mole of a 1 to 4-membered alcohol having 2 to 18 carbon atoms in total, and wherein when the total molar ratio of ethylene oxide and propylene oxide added in the molecule of the polyoxyalkylene alkyl ether is 100 mol%, ethylene oxide is more than 0 mol% and 50 mol% or less, and propylene oxide is 50 mol% or more and less than 100 mol%.
6. The agent for treating polyolefin-based nonwoven fabric according to any one of claims 1 to 5, wherein the long-chain alkyl phosphate salt is at least one selected from the group consisting of an alkali metal salt of a long-chain alkyl phosphate having an alkyl group having 8 to 12 carbon atoms in the molecule, and an alkali metal salt of a long-chain alkyl phosphate having a polyoxyalkylene group comprising an oxyalkylene group having 1 to 10 carbon atoms and an alkyl group having 8 to 12 carbon atoms in the molecule.
7. The agent for treating polyolefin-based nonwoven fabric according to any one of claims 1 to 6, wherein the ether ester compound is contained in an amount of 40 to 85% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 5 to 30% by mass, and the long-chain alkyl phosphate salt is contained in an amount of 3 to 30% by mass, provided that the total content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate salt is 100% by mass.
8. The agent for treating polyolefin-based nonwoven fabric according to any one of claims 1 to 6, further comprising at least one anionic surfactant selected from the group consisting of short-chain alkyl phosphate salts, sulfonates and sulfates having a linear or branched alkyl group having 2 to 7 carbon atoms in the molecule.
9. The polyolefin-based nonwoven fabric treatment agent according to claim 8, wherein the ether ester compound is contained in an amount of 30 to 93% by mass, the polyoxyalkylene alkyl ether is contained in an amount of 1 to 50% by mass, the long-chain alkyl phosphate salt is contained in an amount of 1 to 50% by mass, and the anionic surfactant is contained in an amount of 5 to 30% by mass, provided that the total content of the ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate salt, and the anionic surfactant is 100% by mass.
10. A polyolefin synthetic fiber to which the treating agent for polyolefin nonwoven fabric according to any one of claims 1 to 9 is attached.
11. A method for treating polyolefin synthetic fibers, characterized in that the treating agent for polyolefin nonwoven fabric according to any one of claims 1 to 9 is attached to polyolefin synthetic fibers at a ratio of 0.05 to 3% by mass.
12. The method for treating polyolefin synthetic fibers according to claim 11, wherein the adhesion of the treating agent for polyolefin nonwoven fabric to the polyolefin synthetic fibers is performed by diluting the treating agent for polyolefin nonwoven fabric with water and adhering an aqueous liquid having a concentration of the obtained treating agent for polyolefin nonwoven fabric of 0.5 to 20 mass% to the polyolefin synthetic fibers in a proportion of 0.1 to 1 mass% in terms of the amount of the treating agent for polyolefin nonwoven fabric.
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