TW202113194A - Fiber treatment agent for non-woven fabric - Google Patents

Abstract

A fiber treatment agent for non-woven fabrics, according to the present invention contains at least one component (A) selected from a linear or branched alkyl phosphate ester salt and a polyoxyalkylene linear alkyl ether phosphoric acid ester salt, wherein the component (A) contains a component (a1) in which at least one of the alkyl group of the alkyl phosphate ester salt and/ or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has 16 carbon atoms, and a component (a2) in which at least one of the alkyl group of the alkyl phosphate ester salt and/ or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has 18 carbon atoms, and the mass ratio (a1) / (a2) of the component (a1) and the component (a2) is 1.0 to 3.4.

Description

Fiber treatment agent for non-woven fabric

The present invention relates to a fiber treatment agent for non-woven fabrics.

In the past, in the field of non-woven fabrics used in sanitary materials, in order to impart hydrophilicity to synthetic fibers, a method of using various alkyl phosphate salts, hydrophilic polysiloxane derivatives, non-ionic surfactants and other agents has been proposed. So far, the inventor has proposed various fiber treatment agents for nonwoven fabrics (for example, refer to Patent Documents 1 and 2).

The treatment agent for non-woven fabric manufacturing described in Patent Document 1 is prepared by blending (A) an alkyl phosphate salt having an alkyl group having 8 to 18 carbon atoms and (B) a polyether modified polysiloxane in a predetermined weight ratio. The non-woven fabric with uniform composition can be manufactured.

The fiber treatment agent for nonwoven fabrics described in Patent Document 2 contains: (A) at least one selected from alkyl phosphate salts and polyoxyalkylene alkyl ether phosphate salts, and (B) a melting point of 15°C At least one selected from the group consisting of polyol fatty acid esters, polyoxyalkylene polyol fatty acid esters, and waxes of natural origin. By containing these (A) components and (B) components, the fiber treatment agent for nonwoven fabric of Patent Document 2 can impart hydrophilicity (high water permeability) and repeated water permeability (durable hydrophilicity) to the nonwoven fabric.

The alkyl phosphate salt used in the hydrophilization treatment of synthetic fibers has been variously studied since the past as in Patent Documents 1 and 2, and the alkyl phosphate salt and polyoxyethylene having an alkyl group having 4 to 22 carbon atoms It is widely known that alkylene alkyl ether phosphate salt can impart extremely good hydrophilicity to a non-woven fabric and is formulated in a fiber treatment agent.

[Prior Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 04-82961

[Patent Document 2] JP 2019-019417 A

However, it is known that if an alkyl phosphate salt with a longer alkane chain is used for the purpose of improving durable hydrophilicity, the handling of the drug will be reduced, and it becomes a problem to impart durable hydrophilicity to the hydrophilizing agent while taking into account handling properties. Subject.

Even the fiber treatment agents for non-woven fabrics of Patent Documents 1 and 2 mentioned above still have room for improvement in the durable hydrophilicity of non-woven fabrics. In addition, in the fiber treatment agent for nonwoven fabrics using the conventional alkyl phosphate salt as the main base agent, it is not easy to increase the concentration of the agent. Since the agent itself becomes high in viscosity or is accompanied by separation with time, it is not easy to increase the concentration of the agent. There is still room for improvement in the operability of the medicine.

The present invention was created in view of the above circumstances, and the subject is to provide a fiber treatment agent for non-woven fabrics, which does not damage the raw silk or raw cotton of the non-woven fabrics, and does not damage the raw silk or cotton of the non-woven fabrics. The water permeability of the woven fabric itself, the durable hydrophilicity to the non-woven fabric treated with the medicine, and the good workability.

In order to solve the above-mentioned problems, the inventors have made great efforts to study, and found that by formulating a specific mass ratio in a pharmaceutical agent selected from linear or branched alkyl phosphate salts with a specific carbon number, and polyoxyalkylenes. At least one of the linear alkyl ether phosphate salt of the base linear alkyl ether, the medicament has good operability, and while maintaining the water permeability, it imparts durable hydrophilic properties to the non-woven fabric treated with the medicament, thus completing the present invention.

That is, the fiber treatment agent for nonwoven fabrics of the present invention contains component (A) selected from linear or branched alkyl phosphate salts and polyoxyalkylene linear alkyl ether phosphates At least one of salt,

The aforementioned component (A) includes component (a1) and component (a2), and the aforementioned component (a1) is the alkyl and/or polyoxyalkylene linear alkyl ether phosphate salt of the aforementioned alkyl phosphate salt Where at least one of the alkyl groups has 16 carbon atoms, the aforementioned component (a2) is the alkyl group of the aforementioned alkyl phosphate salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt At least one carbon number is 18;

The mass ratio (a1)/(a2) of the aforementioned component (a1) and component (a2) is 1.0 to 3.4.

According to the present invention, a fiber treatment agent for non-woven fabrics can be obtained, which does not damage the raw silk or raw cotton of the non-woven fabrics. The non-woven fabrics processed by such processes can impart durable hydrophilicity to the non-woven fabrics treated with the agent. , And the operability is good.

Hereinafter, the present invention will be described in detail.

The fiber treatment agent for nonwoven fabrics of the present invention contains at least one component (A) selected from linear or branched alkyl phosphate salts and polyoxyalkylene linear alkyl ether phosphate salts.

The component (A) used in the fiber treatment agent for non-woven fabrics of the present invention is preferably a phosphoric acid monoester salt and/or phosphoric acid diester salt represented by the following formula (I) as the main component, and contains at most phosphoric acid monoester Salter. In addition to these, the component (A) may also contain polyphosphate and the like. Ingredient (A) is typically such a mixture.

[RO(AO) _m ] _3-n P(=O)(OM) _n (I) (In the above formula, R represents an alkyl group, AO represents an oxyalkylene group (A-based alkylene part), M Is a cation, m is the average number of moles added to the polyoxyalkylene, and n is an integer of 1 or 2. When R and M in each formula are plural, each of them may be the same or They are different from each other. AO can be the same or different from each other.)

The component (A), which is a mixture of phosphoric acid monoester salt, phosphoric acid diester salt, etc., can be obtained by, for example, reacting the corresponding alkyl alcohol or polyoxyalkylene alkyl ether having an alkyl group with phosphoric anhydride, and The alkyl phosphoric acid ester or polyoxyalkylene alkyl ether phosphoric acid ester obtained by this reaction is obtained by neutralizing with alkali, such as potassium hydroxide.

Among component (A), the oxyalkylene group in the polyoxyalkylene linear alkyl ether phosphate salt preferably has a carbon number of 2 to 4, more preferably a carbon number of 2 to 3, and a carbon number 2 is even better. Among them, each of them may be the same or different from each other. In the whole oxyalkylene group, it is preferable to contain an oxyethylene group. Among them, it is more preferable that all the oxyalkylene groups are composed of only oxyethylene groups, and the mixture of oxyethylene groups and oxyethylene groups is more preferable, and all the oxyalkylene groups are composed of only oxygen groups. Ethyl What constitutes is even better. In the case where there are a plurality of different carbon numbers in the oxyalkylene system, for example, when oxyethylene and oxypropylene are mixed, these may be randomly mixed, or they may be embedded There are mixed sections.

Among component (A), in terms of the average number of added moles m of polyoxyalkylene in the polyoxyalkylene linear alkyl ether phosphate salt, when RO(AO) in the aforementioned formula (I) ) When m is a plural number, the m system is each independently, for example, 0.25 or more, 0.5 or more, 1 or more, or 2 or more. Also, for example, 30 or less, 20 or less, 10 or less, or 6 or less.

The cation M in the component (A) is not particularly limited, but examples thereof include hydrogen, alkali metals, alkaline earth metals, magnesium, and organic ammonium. Examples of the alkali metal system include lithium, sodium, potassium, and the like. Examples of the alkaline earth metal system include calcium. Examples of the organic ammonium system include those represented by NR ¹ R ² R ³ R ⁴ . Here, R ¹ to R ⁴ each independently represent a hydrogen atom, an alkyl group, a hydroxyalkyl group, and a polyalkylene glycol group. Among these, particularly preferably any alkali metal selected from sodium and potassium, ammonium, and organic ammonium having a carbon number of 20 or less (preferably 10 or less, more preferably 5 or less) alkyl or hydroxyalkyl .

Among component (A), linear or branched alkyl phosphate salt series include, for example, hexyl phosphate, octyl phosphate, 2-ethylhexyl phosphate, decyl phosphate, and isodecyl phosphate. Salt, Lauryl Phosphate (Lauryl Phosphate), Tridecyl Phosphate, Isotridecyl Phosphate, Tetradecyl Phosphate (Myristate Phosphate), Cetyl Phosphate (Cetyl Phosphate) Salt), stearyl phosphate (stearyl phosphate), isostearyl phosphate (isostearyl phosphate), etc.

Among the component (A), the polyoxyalkylene linear alkyl ether phosphate salt series include, for example, polyoxyethylene hexyl ether phosphate salt (POE (1) to POE (30)), polyoxyethylene hexyl ether phosphate salt (POE (1) to POE (30)), and polyoxyethylene hexyl ether phosphate salt. Ethyl octyl ether phosphate salt (POE (1) to POE (30)), polyoxyethylene decyl ether phosphate salt (POE (1) to POE (30)), polyoxyethylene 12 Base ether phosphate salt (lauryl ether phosphate salt) (POE(1) to POE(30)), polyoxyethylene tridecyl ether phosphate salt (POE(1) to POE(30)), polyoxyethylene tetradecyl ether phosphate salt (myristyl ether phosphate salt ) (POE (1) to POE (30)), polyoxyethylene hexadecyl ether phosphate salt (cetyl ether phosphate salt) (POE (1) to POE (30)), polyoxyethylene hexadecyl ether phosphate Stearyl ether phosphate salt (stearyl ether phosphate salt) (POE (1) to POE (30)) and the like. In addition, the numbers in parentheses indicate the number of polyoxyethylene (POE) units.

The method for producing the component (A) in the fiber treatment agent for nonwoven fabrics of the present invention is not particularly limited, but by making the corresponding alkyl alcohol and/or polyoxyalkylene alkyl ether and pentoxide After the phosphorus is reacted in the absence of a solvent, the target compound can be easily obtained by neutralizing it with an alkaline substance. When using this method, the amount of phosphoric acid monoester salt produced will depend on the molar ratio of the corresponding alkyl alcohol and/or polyoxyalkylene alkyl ether with phosphorus pentoxide [(degree of phosphorylation) = (Corresponding to the number of moles of alkyl alcohol and/or polyoxyalkylene alkyl ether)/the number of moles of phosphorus pentoxide] varies, but in terms of experience, phosphorylation The degree is preferably 2.0 to 3.0. If the degree of phosphorylation is less than 2.0, there will be more inorganic phosphates in the ingredients, which may adversely affect the process passability. If the degree of phosphorylation exceeds 3.0, there will be unreacted polyoxyalkylenes. The increase of base ether may cause adverse effects on hydrophilicity and antistatic properties.

In addition, the fiber treatment agent for non-woven fabrics of the present invention contains component (a1) and component (a2) as component (A), wherein the aforementioned component (a1) is an alkyl group and/or poly(a1) of an alkyl phosphate salt. At least one of the carbon atoms in the alkyl group of the oxyalkylene straight-chain alkyl ether phosphate salt is 16, and the aforementioned component (a2) is the alkyl group and/or polyoxyalkylene straight-chain of the alkyl phosphate salt At least one of the alkyl groups of the alkyl ether phosphate salt has 18 carbon atoms. If the component (a1) with the carbon number of the alkyl group is 16 and the component (a2) with the carbon number of the alkyl group is the component (a2), the carbon number of the hydrophobic alkyl group will be relatively large, especially in the durable hydrophilicity. Better. That is to say, it gives higher hydrophilic performance than before, and at the same time does not add When other agents are added, a fiber treatment agent for non-woven fabrics that meets the durable hydrophilicity of non-woven fabrics can be obtained.

Regarding the aforementioned components (a1) and (a2), if the durability and handling properties are considered as good points, the mass ratio of the two components (a1)/(a2) is 1.0 to 3.4, and 3.0 or less is more good. If the mass ratio (a1)/(a2) of the two components is within the above range, the non-woven fabric can be imparted with the desired durable hydrophilicity, and at the same time, good handling properties of the drug can be achieved.

Regarding the alkyl group of (a1) and component (a2), if it is a phosphoric acid monoester salt, hexadecyl (cetyl) and octadecyl (stearyl) are mentioned. If it is a phosphate diester salt, in addition to hexadecyl (cetyl) and octadecyl (stearyl), examples include butyl, hexyl, octyl, nonyl, decyl, and undecyl , Twelve bases (laurel base), 13 bases, fourteen bases, fifteen bases, seventeen bases, nineteen bases, twenty bases, twenty-one bases, twenty-two bases, etc. Component (a1) and component (a2) can be a mixture of compounds with different alkyl groups. In this case, if it is component (a1), it must contain at least one alkyl group with 16 carbon atoms in the molecule. For component (a2), it must contain at least one alkyl group with 18 carbon atoms in the molecule.

The branched alkyl system includes, for example, an alkyl group having one or more branches in the main chain, for example, an alkyl group having 1 to 2 branches. The branch form is not particularly limited, and includes branch forms expressed in iso, neo, sec, and tert. Specifically, for example, isooctyl groups such as 2-ethylhexyl; isodecyl groups such as 2-propylheptyl and 3,6-dimethyloctyl; and isododecyl groups such as 2-butyloctyl ; 3,5-Dimethylundecyl and other isotridecyl groups; 2-heptylnonyl and other isocetyl groups; 2-methylheptadecanyl and other isostearyl groups. The branched higher alcohols used as the raw materials of the component (a1) and the component (a2) are commercially available alcohols having a branched structure obtained by the hydroformylation reaction of olefins (oxo alcohols). )), or react with Guerbet The alcohol (Guerbet alcohol) with a branched structure at the β-position obtained by the condensation of two molecules is preferable. The side chain of any branched higher alcohol can be linear or branched. .

In addition, the fiber treatment agent for nonwoven fabrics of the present invention preferably contains, in addition to the aforementioned components (a1) and (a2), in the component (A), at least one of the alkyl groups has a carbon number of 10 or less. (a3). Considering that the durable hydrophilicity obtained by the component (a1) and the component (a2) is maintained, and the permeability and the penetration of the card machine are improved by the component (a3), the aforementioned component ( a3) The mass ratio (a3)/(a1+a2) relative to the total mass of the aforementioned component (a1) and the aforementioned component (a2) (a1+a2) is preferably 3.0 or less, and more preferably 2.5 or less , 2.0 or less is particularly preferred. If the value of (a3)/(a1+a2) is within the above-mentioned range, the durable hydrophilicity of the nonwoven fabric to which the fiber treatment agent for nonwoven fabric is applied becomes good.

In the fiber treatment agent for non-woven fabrics of the present invention, considering the point of obtaining the effects of the present invention, the total mass of the components (a1) and (a2) is 10 to 70% by mass in the total alkyl phosphate salt. Preferably, it is more preferably from 10 to 50% by mass, and particularly preferably from 10 to 30% by mass. If the total amount of the masses of the components (a1) and (a2) is within the above range, the durable hydrophilicity of the nonwoven fabric to which the fiber treatment agent for nonwoven fabric is applied becomes good.

The fiber treatment agent for nonwoven fabrics of the present invention contains water and a solvent for dissolving component (a1), component (a2) and component (a3), and water is particularly preferred. The water system used in the present invention may be any of pure water, distilled water, purified water, soft water, ion exchange water, tap water, and the like. The ratio of the solid content in the fiber treatment agent for nonwoven fabrics of the present invention is not particularly limited, but is preferably 5 to 90% by mass, and more preferably 10 to 80% by mass.

The fiber processing agent for nonwoven fabrics of this invention may contain other components in the range which does not impair the effect of this invention in addition to the said each component. Examples of other ingredients include: Surfactants, hydrophilic silicone resins, penetrants, smoothing agents, antibacterial agents, antioxidants, preservatives, matting agents, pigments, rust inhibitors, fragrances, defoamers, fragrances, pH adjusters, viscosity adjustment剂 etc. Surfactants include, for example, nonionic surfactants such as polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene fatty acid esters, and fatty acid alkanol amides; α-olefins Sulfonates and alkylbenzene sulfonates, alkyl sulfates, polyoxyalkylene alkyl ether sulfates, sulfosuccinates and other anionic surfactants; alkyl betaines and alkyl sulfobetaines, Amphoteric surfactants such as alkyl amino fatty acid salts; cationic surfactants such as alkyl quaternary ammonium salts, etc.

The manufacturing method of the fiber treatment agent for non-woven fabrics of the present invention is not particularly limited, but for example, it can be prepared by blending component (a1), component (a2), component (a3) and water, and mixing other components as needed, at room temperature. Or heating (for example, 40 to 100° C.) and mixing uniformly as needed to obtain the fiber treatment agent for non-woven fabrics of the present invention. The compounding order and compounding method of each component are not particularly limited. The fiber treatment agent for nonwoven fabrics of the present invention can be, for example, the fiber treatment agent for nonwoven fabrics of the present invention may be diluted with water as necessary, and applied to fibers as an aqueous solution or emulsified dispersion.

Next, a non-woven fabric using the fiber treatment agent for non-woven fabric of the present invention will be described.

The raw material fiber system of the non-woven fabric includes, for example, polyolefin fibers such as polyethylene or polypropylene, synthetic fibers such as polyester fibers and polyamide fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton. Fibers, etc., and mixed fibers, composite fibers, etc. using two or more of these.

The cross-sectional morphology of the fiber may include a circular cross-section and a special-shaped cross-section. Examples of the special-shaped cross section include a star shape, an ellipse shape, a triangle shape, a quadrangular shape, a pentagon shape, a multi-leaf shape, an array shape, a T shape, and a horseshoe shape.

The cross-sectional morphology of the composite fiber includes, for example, a core-sheath type, a side-by-side type, an eccentric core-sheath type, a multilayer type, a radial type, and a sea-island type. Examples of composite fibers include: high-density polyethylene/polypropylene, linear low-density polyethylene/polypropylene, low-density polyethylene/polypropylene, binary copolymers or terpolymers of propylene and other α-olefins/ Polyolefin resins/polyolefin resins such as polypropylene, linear low-density polyethylene/high-density polyethylene, low-density polyethylene/high-density polyethylene, and polypropylene/polyethylene terephthalate, high-density polyethylene Polyolefin resins/polyester resins such as ethylene/polyethylene terephthalate, linear low-density polyethylene/polyethylene terephthalate, low-density polyethylene/polyethylene terephthalate, Copolymerized polyester/polyethylene terephthalate and other polyester resin/polyester resin, and polyamide resin/polyester resin, polyolefin resin/polyamide resin combination, etc.

The spinning method of the raw material fiber may be a known spinning method, and examples thereof include melt spinning, wet spinning, and dry spinning. The spun fiber can be processed for stretching and crimping.

In the manufacturing step of the non-woven fabric, an accumulation layer (web) of fibers is formed, and then the fibers are combined with each other.

The method of forming a fiber accumulation layer includes, for example, a dry method, a wet method, and a spunbond method. In the dry process, short fibers (for example, 15 to 100 mm) are arranged side by side in a certain direction or randomly with an air flow called a carding machine or air-laid to form a fiber accumulation layer. The wet method is to disperse short fibers in water and make them with a paper machine to form a fiber accumulation layer. In the spunbonding method, the molten raw resin is melted/spinned from the front end of the nozzle of the spinning machine, and continuous long fibers are used to form a fiber accumulation layer. Other methods of directly manufacturing non-woven fabrics from the steps of making fibers (spinning) include melt-blown methods, flash-spinning methods, and the like.

The method of bonding the fibers to each other includes, for example, the heating bonding method, the needle rolling method, the water flow complex method, and the chemical bonding method. The heating bonding method is to pass a fiber accumulation layer formed by mixing low-melting thermally bonded fibers through heat rollers for thermal compression bonding, or blowing hot air to bond the fibers to each other. The needle rolling method is to repeatedly pierce the accumulation layer of fibers with a needle that moves up and down at a high speed, and the fibers are entangled by the protrusions engraved on the needle. The water flow entanglement method is also called spunlace, water punch, and water jet, which sprays high-pressure water on the accumulation layer of fibers to entangle the fibers. In the chemical bonding method, the adhesive resin of the emulsion system is attached to the accumulation layer of the fiber by impregnation, spraying, etc., and it is heated and dried to bond the intersection of the fiber.

The method of applying the fiber treatment agent for nonwoven fabric of the present invention to the adhesion treatment of fibers is not particularly limited. The fiber treatment agent for non-woven fabrics of the present invention can be supplied as a spinning finish, a processing finish for the purpose of smoothing and facilitating the production process, or a perfect finish finish for the purpose of the effect on the final use. When used as a processing oil, it can also provide antistatic properties, smoothness, durable hydrophilicity, thermal stability, and safety that can suppress the generation of static electricity, fiber breakage, and the generation of hair balls caused by the friction of the carding machine, etc. Performance. The step of attaching the fiber treatment agent for nonwoven fabric of the present invention to fibers includes, for example, spinning, stretching, crimping, and the like. The adhesion method, in terms of the means to obtain the desired adhesion amount uniformly and efficiently in accordance with the manufacturing process of the fiber and its characteristics, for example, include: oiling, dipping, spraying, bubble coating by a roller, etc. Means to supply the fiber treatment agent for nonwoven fabric of the present invention to the fiber and dry it. Alternatively, the fiber treatment agent for non-woven fabric of the present invention may be supplied to a non-woven fabric in which fibers are bonded by means such as oiling, dipping, spraying, bubble coating, etc. with a roller, and then dried to perform adhesion treatment.

The fiber treatment agent for non-woven fabrics of the present invention can be used as a finishing oil or finishing finishing oil agent for the manufacture of non-woven fabrics that imparts water absorption and antistatic properties to synthetic fibers, and at the same time imparts antistatic and hydrophilic properties to the non-woven fabrics and repeats water permeability.

The adhesion amount of the fiber treatment agent for non-woven fabric of the present invention to the fibers is not particularly limited, but when considering the point of obtaining the effects of the present invention and the performance as a processing oil, the fiber quality is used as a standard, and the solid content is determined. In other words, 0.05 to 2% by mass is preferable, and 0.1 to 1.5% by mass is more preferable.

Regarding the non-woven fabric formed by attaching the fibers to the fiber treatment agent for non-woven fabric of the present invention, the non-woven fabric itself is imparted with water absorption and antistatic properties to the raw silk or raw cotton of the non-woven fabric, and the non-woven fabric itself is processed without damaging it. The repetitive water permeability of the non-woven fabric treated with medicine improves the process passability, so it can be used in various applications requiring such performance. The fields in which the nonwoven fabric of the present invention can be used include, for example, sanitary materials, medical use, clothing materials, daily miscellaneous goods, agricultural/civil engineering materials, tape substrates, filters, packaging materials, and the like. Among them, it is especially suitable for paper diapers, sanitary products, masks, bandages, wound patches, disinfection cloths, surgical tapes and other sanitary materials, especially suitable for disposable diapers for babies and disposable diapers for nursing The surface material of absorbent articles such as sanitary products such as diapers and sanitary napkins, such as a surface sheet, or an intermediate sheet disposed between the surface sheet and an absorption element.

[Example]

Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to these examples.

1. Preparation of fiber treatment agent for non-woven fabric

The components blended (parts by mass) according to Table 4 and Table 5 were stirred at 50 to 80°C for 1 hour to prepare fiber treatment agents for nonwoven fabrics of Examples and Comparative Examples.

Regarding at least one component (A) selected from linear or branched alkyl phosphate salts and polyoxyalkylene linear alkyl ether phosphate salts shown in Table 4 and Table 5, alkyl phosphate At least one of the alkyl group of the salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has a carbon number of 16 component (a1), the alkyl group of the alkyl phosphate salt and/or the poly Component (a2) of which at least one of the alkyl groups of the oxyalkylene straight-chain alkyl ether phosphate salt has a carbon number of 18, the alkyl group of the alkyl phosphate salt and/or the polyoxyalkylene straight-chain alkyl group Each component of the component (a3) in which at least one of the alkyl groups of the ether phosphate salt has a carbon number of 10 or less is shown in Table 1, Table 2, and Table 3. In addition, the compounding amounts described in Table 4 and Table 5 indicate active ingredients. In addition, in each of the examples described in Table 6 and Table 7, except for changing the type of nonwoven fabric, the fiber treatment agent for nonwoven fabric was treated with the blending amounts described in Table 4 and Table 5 to prepare test bodies.

Component (a1) where at least one of the alkyl group of the alkyl phosphate salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has a carbon number of 16

[Table 1]

Component (a2) where at least one of the alkyl group of the alkyl phosphate salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has a carbon number of 18

[Table 2]

Component (a3) where at least one of the alkyl group of the alkyl phosphate salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt has a carbon number of 10 or less

[table 3]

2. Evaluation

The following evaluations were performed using the fiber treatment agent for nonwoven fabric produced above. In addition, the non-woven fabrics use PET/PE staple fiber, breathable non-woven fabric and PP spun-bonded non-woven fabric respectively.

In the following description, the agent means the fiber treatment agent for nonwoven fabrics of the examples and comparative examples, and the adhesion amount means the adhesion amount of solid components (all active ingredients) other than water of the agent.

<PET/PE staple fiber and breathable non-woven fabric>

〔Speed of liquid passing (strike through test)〕

The water permeability is measured with reference to the COVERSTOCK method (NWSP 070.3) of the EDANA method. The measuring device uses the liquid permeability tester (model: LISTER AC) manufactured by LENZING TECHNIK. On the acrylic plate attached to the tester, 3 pieces of specified filter paper (INTEC GRADE: 989 10cm square) are stacked, and then placed on it. Place a test cloth on the test cloth (the amount of drug attached is 0.6%, 10 cm square), and place the liquid-passing detection plate with electrode attached to the measuring device on the test cloth to prepare for measurement. Thereafter, at a height of 25 mm from the surface of the test cloth, 5 mL of physiological saline solution (0.9% sodium chloride aqueous solution) was dropped at a speed of 25 mL/3.5 seconds. The time from dripping to the end of the saline passing through the cloth surface was measured with a liquid permeability measuring device as the liquid flow rate [sec/5mL].

〔Durable hydrophilicity (repeated water permeability)〕

Change the filter paper every time a pass-through test is performed, and perform 5 times in a row, and measure the liquid passing speed each time.

The evaluation system is measured until the liquid flow rate is more than 2 times the liquid flow rate of the first time. When the number of tests exceeds 5 times, it is set to ◎+, the fifth time is set to ◎, and the fourth time is set. It is ○, the third system is set to △, and the second system is set to ×.

〔Operational performance (workability)〕

The operational performance is based on the properties of the formulated product as 1) maintaining fluidity, 2) no product separation, as the evaluation object; when the concentration of the formulated phosphate ester aqueous solution is 50%, it can take into account 1) and 2). Set as ◎+; when the concentration is 30%, it is set to ◎; when the concentration is 30%, the fluidity is slightly poor, but no product separation occurs. If there is no problem as a product, set it as ○; at a concentration of 30 Although there is no product separation at %, the fluidity is quite poor is set to △; when the concentration is 30%, the fluidity is quite poor, and product separation is set to ×.

〔Permeability (cotton precipitation method)〕

Prepare 200 mL of a 5% aqueous solution (converted active ingredient) of the drug to be evaluated, and silently drop the evaluation staple fiber made of untreated polyethylene terephthalate/polyethylene composite fiber from above the aqueous solution ( 1.7dTex, 38mm) 0.5g, and measure the time until the entire short fiber sinks into the aqueous solution.

The evaluation is that the time until the entire short fiber sinks into the aqueous solution is set as ◎+ if it is within 3 seconds, ◎ if it is within 5 seconds, it is set as ○ if it is within 10 seconds, and if it is within 15 seconds Set it as △, and set it as × if it exceeds 15 seconds.

〔Carding machine passability〕

20g of polypropylene short fiber (1.7dTex, 38mm) for evaluation is impregnated with the agent to be evaluated so that the adhesion amount becomes 0.5% (converted to the effective ingredient), and then dried at 80°C for 30 minutes. The opener opens the fiber. The entire amount of the processed raw cotton that has been opened is passed through a miniature roller carding machine, and the state at the time of passing and the state of the obtained web are confirmed on the following items.

(1) Is there a fly?

(2) Whether there is neps (nep)

(3) Whether there is scum

(4) Whether there is a roll attached to the cylinder

(5) Poor web formation

In the evaluation system, if the items from (1) to (5) are not generated at all, set it as ◎+, if one item of mild failure occurs, set it as ◎, if there are 2 items of mild failure, set it as ○, and generate 3 items. The above mild defects are set as △, and the severe defects in any of the items are set as ×.

The results of the above evaluation are shown in Table 4 and Table 5.

[Table 4]

[table 5]

<PP spun bonded non-woven fabric>

Except that the non-woven fabric was changed to PP spunbonded non-woven fabric, the rest was made in the same way as PET/PE staple fiber and breathable non-woven fabric, and based on the evaluation method mentioned above, the [liquid penetration rate (through-print test)] ] And [Durable Hydrophilicity] were tested.

The results of the above evaluation are shown in Table 6 and Table 7.

[Table 6]

[Table 7]

Claims (3)

A fiber treatment agent for non-woven fabrics, containing at least one component (A) selected from linear or branched alkyl phosphate salts and polyoxyalkylene linear alkyl ether phosphate salts, The aforementioned component (A) includes component (a1) and component (a2), wherein the aforementioned component (a1) is the alkyl group of the aforementioned alkyl phosphate salt and/or polyoxyalkylene linear alkyl ether phosphoric acid At least one of the carbon atoms in the alkyl group of the ester salt is 16, the aforementioned component (a2) is the alkyl group of the aforementioned alkyl phosphate salt and/or the alkyl group of the polyoxyalkylene linear alkyl ether phosphate salt At least one of them has 18 carbon atoms; The mass ratio (a1)/(a2) of the aforementioned component (a1) and component (a2) is 1.0 to 3.4. The fiber treatment agent for nonwoven fabrics according to claim 1, wherein the component (A) further contains a component (a3) having at least one of the alkyl groups and a carbon number of 10 or less, The mass ratio (a3)/(a1+a2) of the component (a3) to the total mass of the component (a1) and the component (a2) (a1+a2) is 3.0 or less. The fiber treatment agent for non-woven fabrics according to claim 1 or 2, wherein Containing the aforementioned alkyl phosphate salt as the aforementioned component (A), The total of the masses of the aforementioned component (a1) and the aforementioned component (a2) is 10 to 70% by mass in the total alkyl phosphate salt.