KR20200064157A - Processing agent for polyolefin-based nonwoven fabric, polyolefin-based synthetic fiber, and method for treating polyolefin-based synthetic fiber - Google Patents

Abstract

When the sum total of the content of the specific ether ester compound, the specific polyoxyalkylene alkyl ether, and the specific long chain alkyl phosphate ester salt is 100% by mass, the ether ester compound is 30 to 98% by mass. , 1 to 50% by mass of the polyoxyalkylene alkyl ether and 1 to 50% by mass of the long-chain alkyl phosphate ester salt.

Description

Processing agent for polyolefin-based nonwoven fabric, polyolefin-based synthetic fiber, and method for treating polyolefin-based synthetic fiber

The present invention relates to a treatment agent for a polyolefin-based nonwoven fabric which can impart excellent initial hydrophilicity and durability hydrophilicity to polyolefin-based synthetic fibers, particularly initial hydrophilicity and durability hydrophilicity after long-term storage, and also has good emulsification stability and non-woven fabric permeability. Furthermore, the present invention relates to a polyolefin-based synthetic fiber to which such a treatment agent is attached and a method for treating the polyolefin-based synthetic fiber to which the treatment agent is attached to the polyolefin-based synthetic fiber.

In general, as a hygiene product such as a paper diaper, a product in which a surface of a super absorbent polymer is coated with polyolefin-based synthetic fibers to absorb body fluids is known. Synthetic fibers covering the surface of the superabsorbent polymer, in particular, require initial hydrophilicity to rapidly absorb body fluids, and durable hydrophilicity to rapidly absorb body fluids repeatedly. Therefore, in order to meet the demand, there may be a case where a treatment for providing a treatment agent for a polyolefin-based nonwoven fabric containing a surfactant or the like to the surface of the polyolefin-based synthetic fiber is performed.

Conventionally, a treatment agent for a polyolefin-based nonwoven fabric disclosed in Patent Document 1 is known. Patent Document 1 is a polyolefin-based non-woven fabric treatment agent, including a water-soluble polymer, an alkylphosphate salt and a polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and at least one hydroxyl group of a condensate of dicarboxylic acid with fatty acid, etc. The configuration is disclosed.

Japanese Patent Publication 2010-31407

However, in the conventional treatment agent for polyolefin-based nonwoven fabrics, it was not possible to sufficiently achieve the compatibility of each of the functions of initial hydrophilicity and durability hydrophilicity required for the polyolefin-based fibers subjected to hydrophilization treatment with the treatment agent, and further, emulsion stability and nonwoven fabric permeability.

The problem to be solved by the present invention is to provide excellent initial hydrophilicity and durable hydrophilicity to polyolefin-based fibers, in particular, initial hydrophilicity and durable hydrophilicity after long-term storage, and also a treatment agent for polyolefin-based non-woven fabrics having good emulsification stability and non-woven fabric permeability, polyolefin Disclosed is a method for processing synthetic synthetic fibers and polyolefin synthetic fibers.

The present inventors have researched to solve the above problems, and as a result, a specific ether ester compound, a specific polyoxyalkylene alkyl ether, and a specific long-chain alkyl phosphate ester salt containing a specific ratio of each treatment agent for a polyolefin-based non-woven fabric is properly suitable Found something.

In order to achieve the above object, in one aspect of the present invention, if the sum of the content of the following ether ester compound, the following polyoxyalkylene alkyl ether, and the following long chain alkyl phosphate ester salt in the treatment agent for a polyolefin-based nonwoven fabric is 100% by mass , Polyether-based nonwoven fabric comprising 30 to 98 mass% of the ether ester compound, 1 to 50 mass% of the polyoxyalkylene alkyl ether and 1 to 50 mass% of the long chain alkyl phosphate ester salt A solvent treatment agent is provided.

The ether ester compound is a compound obtained by condensing a compound having 1 to 500 moles of an alkylene oxide having 2 to 4 carbon atoms and a monovalent fatty acid Y having 6 to 26 carbon atoms added to 1 mole of the ester compound of the polyhydric alcohol and the monovalent fatty acid X. .

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 to 4 moles of 1 to 4 carbon alcohols.

The long-chain alkyl phosphate ester salt is a polyoxyalkylene group composed of an alkali metal salt of a long-chain alkyl phosphate ester having an alkyl group having 8 to 22 carbon atoms in the molecule and an oxyalkylene group having 2 to 4 carbon atoms in the molecule, and an alkyl group having 8 to 12 carbon atoms in the molecule. It is at least 1 sort(s) selected from the alkali metal salt of the long chain alkyl phosphate ester.

The ether ester compound is a compound obtained by adding 1 to 200 moles of an alkylene oxide of 2 to 4 carbon atoms to 1 mole of an ester compound of a 2 to 6 carbon alcohol having 2 to 6 carbon atoms and a monovalent fatty acid having 10 to 26 carbon atoms. It is preferable that it is a compound obtained by condensing 6 to 26 monovalent fatty acid Y.

The ether ester compound is a compound having 2 to 4 moles of an alkylene oxide having 2 to 4 carbon atoms added to 1 mole of an ester compound of 2 to 6 carbon atoms having a divalent fatty acid X having 10 to 26 carbon atoms and a carbon number having 2 to 6 carbon atoms. It is preferable that it is a compound obtained by condensing 6 to 26 monovalent fatty acid Y.

The ether ester compound is 1 mol of a compound having 10 to 100 mol of alkylene oxide having 2 to 4 carbon atoms added to 1 mol of an ester compound of divalent fatty acid X having 2 to 6 carbon atoms and 2 to 4 carbon alcohols. It is preferably a compound obtained by condensing monovalent fatty acid Y having 6 to 26 carbon atoms at a ratio of 2 to 3 moles.

The polyoxyalkylene alkyl ether is a compound in which 50 to 150 mol of ethylene oxide and propylene oxide are added to 1 mol of 1 to 4 carbon alcohols having 2 to 18 carbon atoms, and ethylene oxide in the polyoxyalkylene alkyl ether molecule. And when the sum of the addition molar ratio of propylene oxide is 100 mol%, ethylene oxide is more than 0 mol%, more than 50 mol%, propylene oxide is preferably 50 mol% or more and less than 100 mol%.

The long chain alkyl phosphate ester salt is a polyoxyalkylene group consisting of an alkali metal salt of a long chain alkyl phosphate ester having an alkyl group having 8 to 12 carbon atoms in the molecule and 1 to 10 carbon atoms and 2 to 3 oxyalkylene groups, and having 8 to 12 carbon atoms. It is preferable that it is at least 1 sort(s) selected from the alkali metal salt of the long chain alkyl phosphate ester which has an alkyl group in a molecule|numerator.

When the total content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate ester salt is 100% by mass, the ether ester compound is 40 to 85% by mass. It is preferable to contain the polyoxyalkylene alkyl ether in a proportion of 5 to 30 mass% and the long chain alkyl phosphate ester salt in a proportion of 3 to 30 mass%.

The polyolefin-based treatment agent for non-woven fabrics further contains at least one anionic surfactant selected from short-chain alkyl phosphate ester salts, sulfonate salts, and sulfate salts having a straight or branched chain alkyl group having 2 to 7 carbon atoms in the molecule. It is desirable to do.

When the total content of the ether ester compound, the polyoxyalkylene alkyl ether, the long chain alkyl phosphate ester salt, and the anionic surfactant is 100% by mass, the ether ester compound It is preferable to contain 30 to 93 mass%, 1 to 50 mass% of the polyoxyalkylene alkyl ether, 1 to 50 mass% of the long chain alkyl phosphate ester salt, and 5 to 30 mass% of the anionic surfactant. Do.

Further, in another aspect of the present invention, there is provided a polyolefin-based synthetic fiber, characterized in that the treatment agent for a polyolefin-based nonwoven fabric is attached.

Further, in another aspect of the present invention, there is provided a method for treating a polyolefin-based synthetic fiber, wherein the treatment agent for polyolefin-based nonwoven fabric is attached to the polyolefin-based synthetic fiber in a ratio of 0.05 to 3% by mass.

Attachment of the treatment agent for a polyolefin-based nonwoven fabric to the polyolefin-based synthetic fiber is an aqueous solution having a concentration of 0.5 to 20% by mass of a treatment agent for a polyolefin-based non-woven fabric obtained by diluting the treatment agent for a polyolefin-based non-woven fabric with water, and a treatment agent for a polyolefin-based non-woven fabric. It is preferably carried out by adhering to the polyolefin-based synthetic fiber in a ratio of 0.1 to 1 mass% in terms of the amount of.

According to the present invention, it is possible to impart excellent initial hydrophilicity and durable hydrophilicity to polyolefin-based fibers, particularly initial hydrophilicity and durable hydrophilicity after long-term storage, and also to improve emulsification stability and nonwoven fabric permeability.

(First embodiment)

First, the first embodiment in which the treatment agent for a polyolefin nonwoven fabric according to the present invention (hereinafter, simply referred to as a treatment agent) is embodied will be described. The treatment 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 in a predetermined ratio. That is, when the sum of the content ratios of these three components is 100 mass%, the treatment agent is 30 to 98 mass% of the ether ester compound, 1 to 50 mass% of the polyoxyalkylene alkyl ether, and the long chain alkyl phosphate ester The salt is contained in a proportion of 1 to 50% by mass.

The ether ester compound is a compound obtained by condensing a compound having 1 to 500 mol of alkylene oxide having 2 to 4 carbon atoms and a monovalent fatty acid Y having 6 to 26 carbon atoms added to 1 mol of the ester compound of polyhydric alcohol and monovalent fatty acid X. These ether ester compounds may be used alone or in combination of two or more.

Polyoxyalkylene alkyl ether is a compound in which at least one selected from ethylene oxide and propylene oxide is added in a total of 30 to 300 moles per 1 mole of 1 to 4 carbon atoms having 2 to 18 carbon atoms. These polyoxyalkylene alkyl ethers may be used alone or in combination of two or more.

The long-chain alkyl phosphate ester salt is a polyoxyalkylene group composed of an alkali metal salt of a long-chain alkyl phosphate ester having an alkyl group having 8 to 22 carbon atoms in the molecule and an oxyalkylene group having 2 to 4 carbon atoms in the molecule, and an alkyl group having 8 to 12 carbon atoms in the molecule. It is at least 1 sort(s) selected from the alkali metal salt of the long chain alkyl phosphate ester. These long chain alkyl phosphate ester salts may be used alone or in combination of two or more.

As a specific example of the ether ester compound used for the treatment agent of this embodiment, for example, polyoxyethylene (15 mol: represents the added mole number of alkylene oxide. The following is the same) polyoxypropylene (6 mol) castor oil trilaurate, Polyoxyethylene (20 mol) adduct of sorbitan and 12-hydroxystearic acid ester and lauric acid condensate, polyoxyethylene (28 mol) hardened castor oil trioleate, polyoxyethylene (30 mol) Polyoxypropylene (12 mol) cured castor oil tristearate, polyoxyethylene (13 mol) adduct of glycerin and ester of ricinoleic acid and lauric acid, polyoxyethylene (28 mol) cured castor oil tree And polyoxyethylene (32 mol) adducts of laurate, an ester of ethylene glycol and 12-hydroxystearic acid, and a condensate of oleic acid.

Moreover, as a specific example of the polyhydric alcohol which comprises the ether ester used for the treatment agent of this embodiment, for example, ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1 ,4-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-propane Diol, sorbitan, pentaerythritol, sorbitol, and the like.

As a specific example of the monovalent fatty acid X constituting the ether ester used in the treatment agent of the present embodiment, for example, octanoic acid, 2-ethylhexanoic acid, decanoic acid, dodecanoic acid, tridecanoic acid, isotridecanoic acid, hexadecane And acids, octadecanoic acid, isooctadecanoic acid, hydroxyoctadecanoic acid, octadecenoic acid, hydroxyoctadecenoic acid, octadecadienoic acid, octadecateric acid, and docoic acid.

Examples of the monovalent fatty acid Y having 6 to 26 carbon atoms constituting the ether ester used in the treatment agent of the present embodiment include, for example, hexanoic acid, octanoic acid, 2-ethylhexanoic acid, decanoic acid, dodecanoic acid, and tridecanoic acid. , Isotridecanoic acid, hexadecanoic acid, octadecanoic acid, isooctadecanoic acid, 12-hydroxyoctadecanoic acid, octadecenoic acid, octadecadienoic acid, octadecateric acid, docoic acid, hexacoic acid, etc. Can be lifted.

As a specific example of the polyoxyalkylene alkyl ether provided to the treatment agent of this embodiment, for example, polyoxyethylene (20 mol) of propylene glycol, polyoxypropylene (85 mol) random adduct, n-butanol polyoxyethylene ( 42 mol) Polyoxypropylene (96 mol) block adduct, trimethylolpropane polyoxyethylene (18 mol) polyoxypropylene (74 mol) block adduct, isododecyl alcohol polyoxyethylene (27 mol) polyoxy Propylene (32 mol) block adduct, polyoxyethylene (26 mol) polyoxypropylene (80 mol) random addition of sorbitan, polyoxyethylene (32 mol) polyoxypropylene (57 mol) random addition of stearyl alcohol And water.

Specific examples of the long chain alkyl phosphate ester salt used in the treatment agent of the present embodiment include, for example, octyl phosphate ester alkali metal salt, isooctyl phosphate ester alkali metal salt, 2-ethylhexyl phosphate ester alkali metal salt, decyl phosphate ester alkali metal salt, and dodecyl phosphoric acid Ester alkali metal salt, tridecyl phosphate ester alkali metal salt, myristyl phosphate ester alkali metal salt, cetyl phosphate ester alkali metal salt, stearyl phosphate ester alkali metal salt, eicosyl phosphate ester alkali metal salt, behenyl phosphate ester alkali metal salt, polyoxyethylene (20 Molar) Octyl ether phosphate ester alkali metal salt, polyoxyethylene (3 mole) isooctyl ether phosphate ester alkali metal salt, polyoxyethylene (3 mole) polyoxypropylene (6 mole)-2-ethylhexyl ether phosphate alkali metal salt, poly And oxyethylene (2 mol) decyl ether phosphate ester alkali metal salts, polyoxyethylene (2 mol) polyoxypropylene (6 mol) decyl ether phosphate ester alkali metal salts, and the like.

As a specific example of the above-mentioned alkali metal salt, sodium salt, potassium salt, etc. are mentioned, for example.

Specific examples of such an alkyl phosphate ester alkali metal salt include, for example, a monoester body alone, a diester body alone, and a mixture of a monoester body and a diester body. Moreover, the diester body has a diester body (symmetric diester) having the same alkyl group and a diester body (asymmetric diester) having a different alkyl group.

The ether ester compound used in the treatment agent of the present embodiment contains 1 to 2 alkylene oxides of 2 to 4 carbon atoms in 1 mole of the ester compound of 2 to 6 carbon atoms of 2 to 4 alcohols and 10 to 26 carbon atoms of monovalent fatty acid X. It is preferable that it is a compound obtained by condensing a 200 mol-added compound with a monovalent fatty acid Y having 6 to 26 carbon atoms. Among them, a compound having 10 to 100 moles of alkylene oxide having 2 to 4 carbon atoms added to 1 mole of an ester compound of divalent fatty acid X having 2 to 6 carbon atoms and 2 to 4 carbon alcohols and 6 to 26 carbon atoms It is more preferable if it is a compound obtained by condensation of monovalent fatty acid Y. In addition, among them, the ether ester compound is a compound obtained by adding 10 to 100 mol of alkylene oxide having 2 to 4 carbon atoms to 1 mol of the ester compound of divalent fatty acid X having 2 to 6 carbon atoms and 2 to 4 divalent alcohol. It is more preferable if it is a compound obtained by condensing monovalent fatty acid Y having 6 to 26 carbon atoms in a ratio of 2 to 3 moles per mole. With this configuration, it is possible to impart better initial hydrophilicity and durability to hydrophilicity. In particular, it is possible to impart initial hydrophilicity and durable hydrophilicity, which are difficult to deteriorate even after long-term storage.

The polyoxyalkylene alkyl ether used in the treatment agent of the present embodiment is a compound in which 50 to 150 moles of ethylene oxide and propylene oxide are added to 1 mole of 1 to 4 carbon alcohols having 2 to 18 carbon atoms, and polyoxyalkylene alkyl When the sum of the addition mole ratios of ethylene oxide and propylene oxide in the ether molecule is 100 mol%, it is preferable that ethylene oxide is greater than 0 mol% and 50 mol% or less, and propylene oxide is 50 mol% or more and less than 100 mol%. With this configuration, it is possible to impart better initial hydrophilicity and durability to hydrophilicity. In particular, it is possible to impart initial hydrophilicity and durable hydrophilicity, which are difficult to deteriorate even after long-term storage.

The long-chain alkyl phosphate ester salt used in the treatment agent of the present embodiment is a polyoxyalkyl composed of an alkali metal salt of a long-chain alkyl phosphate ester having an alkyl group having 8 to 12 carbon atoms in the molecule and 1 to 10 oxyalkylene groups having 2 to 3 carbon atoms. It is preferable that it is at least 1 sort(s) selected from the alkali metal salt of the long chain alkyl phosphate ester which has a alkylene group and an alkyl group of 8-12 carbon atoms in a molecule|numerator. With this configuration, it is possible to impart better initial hydrophilicity. In particular, it is possible to impart initial hydrophilicity that is difficult to deteriorate even after long-term storage.

When the sum of the content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long-chain alkyl phosphate ester salt is 100 mass%, the treatment agent of the present embodiment is 40 to 85 mass% of the ether ester compound, polyoxyalkylene It is more preferable to contain an alkyl ether in a proportion of 5 to 30 mass% and a long chain alkyl phosphate ester salt in a proportion of 3 to 30 mass%. With such a structure, it is possible to impart initial hydrophilicity and durability hydrophilicity, which are difficult to deteriorate even after storage for a long period of time.

The treatment agent of the present embodiment further comprises at least one anionic surfactant selected from short-chain alkyl phosphate ester salts, sulfonate salts, and sulfate salts having a straight or branched chain alkyl group having 2 to 7 carbon atoms in the molecule. It is also good. These anionic surfactants may be used alone or in combination of two or more. By such a structure, the nonwoven fabric permeability can be further improved. The proportion of the ether ester compound, the polyoxyalkylene alkyl ether, the long chain alkyl phosphate ester salt, and the anionic surfactant in the treatment agent of the present embodiment is not particularly limited. When the total amount of the ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate ester salt, and the anionic surfactant is 100% by mass, the ether ester compound is 30 to 30%. It is preferable to contain 93 mass%, 1 to 50 mass% of polyoxyalkylene alkyl ether, 1 to 50 mass% of long chain alkyl phosphate ester salt, and 5 to 30 mass% of anionic surfactant. By such a structure, the nonwoven fabric permeability can be further improved. In addition, it is possible to impart endurance hydrophilicity, which is particularly difficult to deteriorate even after long-term storage.

As specific examples of the short-chain alkyl phosphate ester salt having a straight or branched chain alkyl group having 2 to 7 carbon atoms in the molecule, for example, ethyl phosphate ester salt, propyl phosphate ester salt, butyl phosphate ester salt, pentyl phosphate ester salt, hexyl phosphate ester salt And the like.

As specific examples of the sulfonate salt, for example, heptyl sulfonic acid sodium salt, 2-ethylhexyl sulfonic acid sodium salt, octyl sulfonic acid sodium salt, nonyl sulfonic acid sodium salt, decyl sulfonic acid sodium salt, undecyl sulfonic acid sodium salt, dodecyl sulfonic acid sodium salt, tri Sodium decylsulfonic acid salt, sodium decylbenzenesulfonic acid salt, sodium undecylbenzenesulfonic acid salt, sodium dodecylbenzenesulfonic acid salt, sodium tridecylbenzenesulfonic acid salt, sodium tetradecylbenzenesulfonic acid salt, sodium pentadecylbenzenesulfonic acid salt, sodium hexadecylbenzenesulfonic acid Sodium salt, hexadecyl diphenyl ether disulfonic acid sodium salt, sulfosuccinic acid di-2-ethylhexyl sodium salt, sulfosuccinic acid di-2-ethylhexyl potassium salt, dioctyl sulfosuccinate sodium salt, dioctyl sulfosuccinate potassium salt, sulfo And sodium dododecyl succinate salt, potassium dododecyl sulfosuccinate salt, sodium dihexadecyl sulfosuccinate salt, potassium dihexadecyl sulfosuccinate salt, and the like.

Specific examples of the sulfate salt include, for example, 4-methylpentyl sulfate sodium salt, octyl sulfate sodium salt, octyl potassium sulfate salt, 2-ethylhexyl sulfate sodium salt, isononyl sulfate sodium salt, decyl sulfate sodium salt, and decyl potassium sulfate salt , 1-methylnonyl sulfate sodium salt, isodecyl sulfate sodium salt, dodecyl sulfate sodium salt, dodecyl potassium sulfate salt, 2-butyloctyl sulfate sodium salt, tetradecyl sulfate sodium salt, pentadecyl sulfate sodium salt, pentadecyl sulfate Potassium salt, hexadecyl sulfate sodium salt, hexadecyl sulfate sulfate, heptadecyl sulfate sodium salt, 3,9-diethyltridecan-6-yl sulfate sodium salt, octadecyl sulfate sodium salt, octadecyl potassium sulfate salt, poly Sodium oxyethylene dodecyl sulfate, sodium polyoxyethylene octylphenyl ether sulfate, potassium polyoxyethylene octylphenyl ether sulfate, sodium polyoxyethylene nonylphenyl ether sulfate, potassium polyoxyethylene nonylphenyl ether sulfate Can be.

(Second embodiment)

The polyolefin-based synthetic fiber according to the present embodiment is a polyolefin-based synthetic fiber to which the treating agent of the first embodiment is attached. As the attachment method, a known method, for example, a immersion method, a spray method, a roller refueling method, a guide refueling method using a metering pump, or the like can be applied. In addition, a spray method, a roll coater, a gravure coater, a die coater, a curtain coater, or the like may be used.

The polyolefin-based synthetic fiber is not particularly limited, and examples thereof include polyolefin-based fibers such as polyethylene fibers, polypropylene fibers, and polybutene fibers. These may be used alone or in combination of two or more. Further, as the composite fiber of the core sheath structure, either a core or a sheath portion or a composite fiber in which both are polyolefin-based fibers, for example, a polyethylene/polypropylene composite fiber in which the sheath is a polyethylene fiber, a polyethylene/polyester composite fiber or the like may be used.

Particularly, when the treatment agent of the first embodiment is added to the polyolefin-based synthetic fiber nonwoven fabric, it is preferable because the expression of each effect of the durability hydrophilicity and initial hydrophilicity of the obtained nonwoven fabric becomes larger. In particular, it is possible to impart initial hydrophilicity and durable hydrophilicity, which are difficult to deteriorate even after long-term storage. The type of the nonwoven fabric is not particularly limited, and examples thereof include spunbond, melt blown, spunbond and meltblown composite nonwoven fabrics, and the like.

(Third embodiment)

The treatment method of the polyolefin-based synthetic fiber according to the present embodiment (hereinafter also simply referred to as a treatment method) is characterized in that the treatment agent of the first embodiment is attached to the polyolefin-based synthetic fiber.

The treatment method of the present embodiment may further be characterized in that the treating agent of the first embodiment is attached to the polyolefin-based synthetic fiber in a ratio of 0.05 to 3% by mass as the treating agent of the first embodiment containing no solvent. have. The amount of the treatment agent in the polyolefin-based synthetic fiber with the treatment agent thus obtained is 0.05 to 3% by mass.

Examples of the form of the treating agent when the treating agent of the first embodiment is attached to the synthetic fiber include, for example, an organic solvent solution and an aqueous solution.

In the treatment method of the present embodiment, the treatment agent of the first embodiment is diluted with water so that the concentration of the treatment agent is 0.5 to 20% by mass of an aqueous solution, and the treatment agent of the first embodiment does not contain a solvent of 0.1 to 1% by mass. It is preferable to include attaching the aqueous liquid to the polyolefin-based synthetic fiber so as to have a ratio. That is, the adhesion of the treatment agent of the first embodiment to the polyolefin-based synthetic fiber is 0.1 to 1 mass% of the aqueous solution having a concentration of the treatment agent obtained by diluting the treatment agent with water in an amount of 0.5 to 20 mass% in terms of the amount of the treatment agent. It is preferably carried out by adhering to a polyolefin-based synthetic fiber so as to have a ratio. The amount of the treating agent in the polyolefin-based synthetic fiber with the treating agent thus obtained is 0.1 to 1% by mass.

According to the treatment agent of the above-described embodiment, the polyolefin-based synthetic fiber, and the treatment method, the following effects can be obtained.

(1) In the said embodiment, the processing agent containing the said ether ester compound, the said polyoxyalkylene alkyl ether, and the said long chain alkyl phosphate ester salt in the predetermined ratio was constituted. Therefore, it is possible to impart excellent initial hydrophilicity and durable hydrophilicity to the polyolefin-based fiber. In particular, it is possible to impart initial hydrophilicity and durable hydrophilicity, which are difficult to deteriorate even after long-term storage. In addition, the emulsification stability of the treatment agent can be improved. Furthermore, the nonwoven fabric permeability of the treatment agent can be improved.

Note that the above embodiment may be changed as follows.

In the treatment agent of the above embodiment, as a stabilizer or antistatic agent for maintaining the quality of the treatment agent within a range that does not impair the effects of the present invention, components commonly used in treatment agents such as binders, antioxidants, and ultraviolet absorbers are additionally blended. You may do it.

Example

Hereinafter, examples and the like are given to more specifically explain the configuration and effects of the present invention, but the present invention is not limited to these examples. In addition, in the description of the following Examples and Comparative Examples, parts by mass mean, and% means mass%.

<Test Category 1>

Synthesis of ether ester compound (A-1)

933 g (1 mole) of castor oil and 2 g of sodium hydroxide as a catalyst were placed in an autoclave, and a mixture of 660 g (15 moles) of ethylene oxide and 348 g (6 moles) of propylene oxide was pressed into the autoclave to perform etherification. Ether ester compound (A-1) was obtained by esterifying with 600 g (3 mol) of lauric acid as monovalent fatty acid Y.

(A-2), (A-6) to (A-9), (A-15) to (A-20) among the ether ester compounds shown in Table 3 in the same order as the ether ester compounds (A-1), (A-22) to (A-24), (A-28) to (A-30), (A-33), and (A-34) were synthesized.

Synthesis of ether ester compound (A-3)

62 g (1 mol) of ethylene glycol as polyhydric alcohol and 600 g (2 mol) of 12-hydroxystearic acid as monovalent fatty acid X were placed in a reaction vessel, and esterification was performed. The obtained ester compound was placed in an autoclave, and 2 g of potassium hydroxide was added as a catalyst. Subsequently, ether ester compound (A-3) was obtained by subjecting 1408 g (32 mol) of ethylene oxide into an autoclave to etherify, and further esterifying with 847 g (3 mol) of oleic acid as monovalent fatty acid Y. .

(A-4), (A-5), (A-10) to (A-13), (A-21), among the ether ester compounds shown in Table 3 in the same order as the ether ester compounds (A-3), (A-25) to (A-27), (A-31), and (A-32) were synthesized. Table 3 shows the types of polyhydric alcohols used as the respective raw materials for the ether ester compounds (A-1) to (A-34), the type and condensation number of monovalent fatty acids X, the type and addition number of alkylene oxides, and the number of monovalent fatty acids. It shows the kind of Y and the number of condensation.

Synthesis of polyoxyalkylene alkyl ether (B-1)

77 g (1 mol) of propylene glycol and 2 g of potassium hydroxide as a catalyst were placed in an autoclave, purged with nitrogen gas, and then heated to 140°C. In addition, polyoxyalkylene alkyl ether (B-1) was synthesized by reacting a mixture of 880 g (20 moles) of ethylene oxide and 4930 g (85 moles) of propylene oxide in an autoclave over 3 hours.

The polyoxyalkylene alkyl ethers (B-2) to (B-16) shown in Table 4 were synthesized in the same order as the polyoxyalkylene alkyl ether (B-1). Table 4 shows the types of aliphatic alcohols, alkylene oxide types and added moles, and the total added moles of each of the polyoxyalkylene alkyl ethers (B-1) to (B-16) as raw materials.

Table 5 shows the types of alkyl groups and alkali metal salts and the types and numbers of polyoxyalkylene groups of each of the long-chain alkyl phosphate ester salts (C-1) to (C-12) used in the preparation of a treatment agent for polyolefin-based nonwoven fabrics. have. In addition, Table 6 shows the types of anionic surfactants (D-1) to (D-4) used in the preparation of the treatment agent for polyolefin nonwoven fabrics.

<Test Category 2>

Preparation of treatment agent for polyolefin-based nonwoven fabric (Example 1)

28 g of ether ester compound (A-1) as component A, 7.5 g of polyoxyalkylene alkyl ether (B-1) as component B, 10.5 g of long chain alkyl phosphate ester salt (C-1) as component C, and anion as component D 4 g of surfactant (D-1) was mixed and 450 g of water was added to obtain an aqueous 10% by mass treatment agent for a polyolefin-based nonwoven fabric.

Preparation of treatment agent for polyolefin-based nonwoven fabrics (Examples 2 to 57 and Comparative Examples 1 to 15)

A 10 mass% aqueous solution (Examples 2 to 57 and Comparative Examples 1 to 15) of a polyolefin-based nonwoven fabric treating agent was prepared in the same procedure as in Example 1.

In the column of "the composition of the treatment agent" in Tables 1 and 2, the ether ester compound (A) and polyoxy used in preparing the 10% by mass aqueous solution of the treatment agent for polyolefin nonwoven fabrics in Examples 1 to 57 and Comparative Examples 1 to 15, respectively. The types of alkylene alkyl ether (B), long-chain alkyl phosphate ester salt (C), anionic surfactant (D) and the content ratio (%) of each component in the treatment agent are shown.

<Test Category 3>

· Adhesion of polyolefin-based non-woven processing agent to polyolefin-based synthetic fibers

The aqueous solutions of the respective treatment agents of prepared Examples 1 to 57 and Comparative Examples 1 to 15 were further diluted with water to prepare aqueous solutions having a concentration of 0.25 mass%. A treatment bath (bath temperature 25° C.) was prepared using this aqueous solution, and a polypropylene spunbond nonwoven fabric (basis weight 20 g/m ² ) was immersed in this treatment bath for 5 minutes and taken out. Thereafter, the compression rate was adjusted with a mangle so that the amount of the aqueous solution adhered to 2 g of the polypropylene spunbond nonwoven fabric was 4 g, and then compressed and blow-dried for 80° C. for 30 minutes to prepare a non-woven fabric for evaluation below. . In addition, the adhesion amount of the treatment agent 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. The results of these measurements are shown in the "Adhesive amount to fibers" column of Tables 1 and 2.

<Test Category 4 (Evaluation of treatment agent for non-woven polyolefin)>

Evaluation of initial hydrophilicity (immediately after preparation of treated nonwoven fabric for evaluation)

The non-woven fabric for evaluation was cut into small pieces of 10 cm×15 cm, and the temperature was adjusted at 20° C. for 24 hours in a constant temperature room with a relative humidity of 60%. Ten sheets of toilet paper were superimposed to form an absorbent body, and a processed nonwoven fabric for evaluation was placed thereon. An evaluation treatment nonwoven fabric and toilet paper were installed on a 45°C inclined plate, and 0.05 g of physiological saline at 37°C was added dropwise at a height of 1 cm above the nonwoven fabric.

The length of the flow from the dropping point to the end of absorption (i.e., the distance through which the surface of the nonwoven fabric flowed while absorbing the nonwoven fabric onto the nonwoven fabric) was measured five times for one sheet of the evaluation processing nonwoven fabric, and the average value thereof. Based on the following evaluation criteria, the initial hydrophilicity of the treated nonwoven fabric immediately after preparation was evaluated. The evaluation results are shown in the "Initial Hydrophilicity" column of the "Immediately after Preparation" column of Tables 1 and 2.

· Evaluation criteria of initial hydrophilicity

Flow length less than 30mm: ◎ (excellent).

The flow length is more than 30mm and less than 50mm: ○ (good).

Flow length over 50mm: Ｘ (poor).

Evaluation of durability hydrophilicity (immediately after preparation of treated nonwoven fabric for evaluation)

The non-woven fabric for evaluation was cut into small pieces of 10 cm×25 cm, and the temperature was adjusted at 20° C. for 24 hours in a constant temperature room with a relative humidity of 60%. Ten sheets of toilet paper were superimposed on the absorber, and a non-woven fabric for evaluation was set thereon, and again, a 415 g stainless steel plate with a hole of 2 cm in diameter drilled at equal intervals was placed on the nonwoven fabric. 0.05 g of physiological saline at 37° C. was added dropwise at a height of 1 cm above the nonwoven fabric. The physiological saline was dropped at 20 places on the same nonwoven fabric, and the number of holes in the portion absorbed into the nonwoven fabric within 10 seconds was counted among the holes of the stainless plate placed on the nonwoven fabric. After that, the same measurement was repeated every 3 minutes, and the endurance hydrophilicity of the treated nonwoven fabric immediately after preparation was evaluated based on the following evaluation criteria based on the fifth measurement result. The evaluation results are shown in the “durability hydrophilicity” column of the “directly after preparation” column of Tables 1 and 2.

· Evaluation criteria of durable hydrophilicity

Among the holes of the stainless plate on the nonwoven fabric, the number of holes in the portion absorbed by the nonwoven fabric within 10 seconds of dripping physiological saline is 18 or more: ◎ (excellent).

12 or more and less than 18: ○ (good).

Less than 12: Ｘ (poor).

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°C for 2 weeks.

Using the treated nonwoven fabric after storage, the initial hydrophilicity and durability hydrophilicity of the treated nonwoven fabric after long-term storage were evaluated in the same order as the evaluation of the initial hydrophilicity and durability hydrophilicity. The evaluation results are shown in the "Initial Hydrophilicity" column and the "Endurance Hydrophilicity" column in the "Evaluation Over Time" column of Tables 1 and 2.

· Evaluation of nonwoven permeability

The nonwoven fabric to which the treatment agent was not applied was temperature-controlled at 20° C. in a constant temperature room with a relative humidity of 60% for 24 hours. 5 μL of 1% emulsion (aqueous solution) of each treatment agent was added dropwise onto the nonwoven fabric to measure the time until complete penetration, and based on the measured values, the permeability to the nonwoven fabric of each treatment agent was evaluated based on the following evaluation criteria. The evaluation results are shown in the "Non-woven fabric permeability" column of Tables 1 and 2.

· Evaluation criteria of nonwoven permeability

Penetration in less than 10 seconds: ◎ (excellent).

It is more than 10 seconds and penetrates in less than 60 seconds: ○ (good).

Penetration over 60 seconds: Ｘ (poor).

· Evaluation of emulsion stability

A 10% emulsion (aqueous solution) of each treatment agent was prepared, and the temperature was adjusted for 24 hours in a constant temperature room with a relative humidity of 60% at 20°C, and then visually confirming whether or not the components in the treatment agent were separated by the following evaluation criteria. Emulsion stability was evaluated. The evaluation results are shown in the "Emulsification stability" column of Tables 1 and 2.

· Evaluation criteria of emulsion stability

No separation: ◎ (excellent).

With separation: Ｘ (poor).

As can be seen from the results of Tables 1 and 2, according to the present invention, excellent initial hydrophilicity and durability hydrophilicity can be imparted to the polyolefin-based fiber, and emulsification and nonwoven fabric permeability is good, and also initial hydrophilicity and durability after long-term storage. It was confirmed that there is an effect that the hydrophilicity is difficult to decrease.

Claims (12)

When the total content of the following ether ester compound, the following polyoxyalkylene alkyl ether, and the following long-chain alkyl phosphate ester salt in the polyolefin-based non-woven fabric treating agent is 100% by mass, the ether ester compound is 30 to 98% by mass, the poly A treatment agent for a polyolefin-based nonwoven fabric comprising 1 to 50% by mass of oxyalkylene alkyl ether and 1 to 50% by mass of the long-chain alkyl phosphate ester salt.
Ether ester compound: A compound obtained by condensing a compound having 1 to 500 mol of alkylene oxide having 2 to 4 carbon atoms and a monovalent fatty acid Y having 6 to 26 carbon atoms added to 1 mol of the ester compound of polyhydric alcohol and monovalent fatty acid X.
Polyoxyalkylene alkyl ether: A compound obtained by adding 30 to 300 moles of at least one selected from ethylene oxide and propylene oxide to 1 to 4 moles of 1 to 4 carbon alcohols.
Long-chain alkyl phosphate ester salt: having a polyoxyalkylene group consisting of an alkali metal salt of a long-chain alkyl phosphate ester having 8 to 22 carbon atoms in the molecule and an oxyalkylene group having 2 to 4 carbon atoms in the molecule At least 1 sort(s) selected from alkali metal salts of long chain alkyl phosphate esters. The method of claim 1, wherein the ether ester compound is 1 to 200 moles of alkylene oxides of 2 to 4 carbon atoms to 1 mole of ester compound of 2 to 6 carbon atoms of divalent fatty acid X and 10 to 26 carbon atoms. A treatment agent for a polyolefin-based nonwoven fabric, which is a compound obtained by condensing an added compound and a monovalent fatty acid Y having 6 to 26 carbon atoms. According to claim 1 or claim 2, wherein the ether ester compound is a C2-C4 alkylene oxide having 2 to 4 carbon atoms in 1 mol of the ester compound of a C4-C6 dihydric fatty acid X with 10 to 26 carbon atoms. A treatment agent for a polyolefin-based nonwoven fabric, which is a compound obtained by condensing a compound having 10 to 100 moles added and a monovalent fatty acid Y having 6 to 26 carbon atoms. The ether ester compound according to any one of claims 1 to 3, wherein the ether ester compound has 2 to 4 carbon atoms per mole of an ester compound of 2 to 6 carbon atoms and a divalent fatty acid X having 10 to 26 carbon atoms. A treatment agent for a polyolefin-based nonwoven fabric, which is a compound obtained by condensing monovalent fatty acid Y having 6 to 26 carbon atoms at a ratio of 2 to 3 moles per 1 mole of a compound obtained by adding 10 to 100 moles of alkylene oxide. The compound according to any one of claims 1 to 4, wherein the polyoxyalkylene alkyl ether is 50 to 150 moles of ethylene oxide and propylene oxide added to 1 to 4 moles of 1 to 4 carbon alcohols having 2 to 18 carbon atoms. When the sum of the addition mole ratios of ethylene oxide and propylene oxide in the polyoxyalkylene alkyl ether molecule is 100 mol%, ethylene oxide is greater than 0 mol% and 50 mol% or less, and propylene oxide is 50 mol% or more. It is also less than 100 mol% of a polyolefin-based non-woven fabric treatment agent. The alkali metal salt of the long-chain alkyl phosphate ester according to any one of claims 1 to 5, wherein the long-chain alkyl phosphate ester salt has an alkyl group having 8 to 12 carbon atoms in the molecule and 1 to 10 oxyalkyls having 2 to 3 carbon atoms. A treatment agent for a polyolefin-based nonwoven fabric, which is at least one member selected from alkali metal salts of long-chain alkyl phosphate esters having a polyoxyalkylene group consisting of a alkylene group and an alkyl group having 8 to 12 carbon atoms in the molecule. The ether ester compound according to any one of claims 1 to 6, wherein the total content of the ether ester compound, the polyoxyalkylene alkyl ether, and the long chain alkyl phosphate ester salt is 100% by mass. A treatment agent for a polyolefin nonwoven fabric comprising 40 to 85 mass%, 5 to 30 mass% of the polyoxyalkylene alkyl ether, and 3 to 30 mass% of the long chain alkyl phosphate ester salt. The at least 1 selected from the short-chain alkyl phosphate ester salt, sulfonate salt, and sulfate salt of any one of Claims 1-6 which has a C2-C7 linear or branched alkyl group in a molecule|numerator. A treatment agent for polyolefin-based nonwoven fabrics containing a species of anionic surfactant. The ether ester compound, the polyoxyalkylene alkyl ether, the long-chain alkyl phosphate ester salt, and the sum of the content ratio of the anionic surfactant is 100% by mass, the ether ester compound is 30 to For polyolefin-based nonwoven fabrics containing 93 mass%, 1 to 50 mass% of the polyoxyalkylene alkyl ether, 1 to 50 mass% of the long chain alkyl phosphate ester salt, and 5 to 30 mass% of the anionic surfactant Treatment agent. A polyolefin-based synthetic fiber comprising the treatment agent for a polyolefin-based nonwoven fabric according to any one of claims 1 to 9. A method for treating a polyolefin-based synthetic fiber, characterized in that the polyolefin-based synthetic fiber treatment agent according to any one of claims 1 to 9 is attached to the polyolefin-based synthetic fiber in a ratio of 0.05 to 3% by mass. 12. The method of claim 11, wherein the adhesion of the treatment agent for a polyolefin-based nonwoven fabric to the polyolefin-based synthetic fiber is an aqueous solution having a concentration of 0.5 to 20% by mass of the treatment agent for a polyolefin-based non-woven fabric obtained by diluting the treatment agent for the polyolefin-based nonwoven fabric with water. , A polyolefin-based synthetic fiber treatment method performed by adhering to the polyolefin-based synthetic fiber in a ratio of 0.1 to 1% by mass in terms of the amount of the treatment agent for polyolefin-based nonwoven fabric.