TWI782768B - Short fiber treatment agent, synthetic fiber, and method for manufacturing nonwoven fabric - Google Patents

Abstract

The problem to be solved by the present invention is to improve the water repellency and antistatic properties of synthetic fibers, and at the same time improve the solution stability of the treatment agent for short fibers. The processing agent for short fibers contains the following component (A), the following component (B), and the following component (C). Component (A) is an ester compound formed of a monohydric alcohol having a hydrocarbon group having 12 to 22 carbon atoms and a monohydric fatty acid having a hydrocarbon group having 12 to 22 carbon atoms. Component (B) is at least one selected from the group consisting of alkyl phosphate ester salts having an alkyl group having 16 to 22 carbon atoms and alkyl phosphate ester salts having an alkyl group having 4 to 8 carbon atoms. Component (C) is at least one selected from fatty acids having a hydrocarbon group having 12 to 22 carbon atoms and salts thereof.

Description

Treatment agent for staple fiber, synthetic fiber, and method for producing nonwoven fabric

The present invention relates to a processing agent for short fibers, synthetic fibers, and a method for producing non-woven fabrics.

In general, synthetic fibers are used as raw material fibers for nonwoven fabrics. For example, in the manufacture of non-woven fabrics, the staple fibers of synthetic fibers are first produced, and then the staple fibers are passed through a carding machine to make a carding web. Then, the carded web is subjected to hot air treatment using a thermally conductive bonding method to bond the short fibers to each other, thereby producing a nonwoven fabric.

Moreover, functions, such as water repellency, are provided by coating synthetic fiber with the processing agent for short fibers. Nonwoven fabrics made of synthetic fibers endowed with functions such as water repellency are used in a wide range of fields such as hygiene materials, medical care, and civil engineering.

Patent Document 1 discloses a treatment agent for short fibers containing an ester compound formed of an alkyl phosphate having a specific hydrocarbon group, an alcohol having a specific hydrocarbon group, and a fatty acid having a specific hydrocarbon group, and a silicone compound.

prior art literature patent documents Patent Document 1: International Publication No. 2017/199702

The problem to be solved by the invention However, in addition to imparting functions such as water repellency, the treatment agent for short fibers also seeks to improve the carding processability in the production process of nonwoven fabrics, and to suppress scum generated in the production line in the production process of short fibers. In order to improve the processability of carding, it is necessary to improve the antistatic property of, for example, synthetic fibers to which a treatment agent for short fibers is attached. In addition, in order to suppress scum, for example, it is necessary to improve the solution stability of the treatment agent for short fibers.

means to solve problems A treatment agent for short fibers for solving the above-mentioned problems, which contains the following component (A), the following component (B), and the following component (C), when the above-mentioned component (A), the above-mentioned component (B), and When the total content ratio of the above-mentioned component (C) is taken as 100 parts by mass, the above-mentioned component (A) is contained at least 50 parts by mass, and the point is: the ratio of the content of the above-mentioned component (A) in the above-mentioned treatment agent for short fibers More than 40% by mass. Component (A): an ester compound of a monohydric alcohol having a hydrocarbon group having 12 to 22 carbon atoms and a monohydric fatty acid having a hydrocarbon group having 12 to 22 carbon atoms. Component (B): At least one selected from the group consisting of alkyl phosphate ester salts having an alkyl group having 16 to 22 carbon atoms and alkyl phosphate ester salts having an alkyl group having 4 to 8 carbon atoms. Component (C): At least one selected from fatty acids having a hydrocarbon group having 12 to 22 carbon atoms and salts thereof. (Which excludes the following aspects: the above-mentioned short fiber treatment agent contains 10% by mass to 45% by mass of polyoxyalkylene-containing hydroxy fatty acid polyol ester and dicarboxylic acid (or dicarboxylic acid derivative) The formed condensate and/or esters in which at least one hydroxyl group in the condensate is blocked by fatty acid) That is to say, the above-mentioned short fiber treatment agent does not contain the above-mentioned condensate and/or is derived from its condensation The above-mentioned ester of 10% by mass to 45% by mass of the product may not be contained at all, or contained but the amount thereof is less than 10% by mass, or exceeds 45% by mass, preferably less than 10% by mass.

The above-mentioned processing agent for short fibers preferably contains 50 to 80 parts by mass, 10 to 40 parts by mass of the above-mentioned component (B), and 1 to 10 parts by mass of the above-mentioned component (C).

The above-mentioned treating agent for short fibers is preferably a polyoxyalkylene derivative further containing component (D).

As for the said processing agent for short fibers, it is preferable that the content rate of the said component (D) is 5-30 mass %.

The treatment agent for short fibers preferably contains the above-mentioned components when the total content ratio of the above-mentioned component (A), the above-mentioned component (B), the above-mentioned component (C) and the above-mentioned component (D) is 100 parts by mass. (A) 60-80 mass parts, the said component (B) 10-30 mass parts, the said component (C) 1-10 mass parts, and the ratio of the said component (D) 5-20 mass parts.

The synthetic fiber for solving the above-mentioned problems is mainly that the above-mentioned treatment agent for short fibers is adhered.

The aforementioned synthetic fibers are preferably polyolefin-based synthetic fibers.

The manufacturing method of the nonwoven fabric for solving the above-mentioned problems is mainly to pass the following steps 1-3. Step 1: Attach the treatment agent for short fibers according to any one of Claims 1 to 5 to synthetic fibers. Step 2: Pass the synthetic fibers to which the treating agent for short fibers adhered in Step 1 through a carding machine to obtain a carded web. Step 3: heat-welding the carded web obtained in Step 2 to obtain a nonwoven fabric. That is to say, the above-mentioned method includes the step of attaching the treatment agent for short fibers to the synthetic fibers, the step of passing the synthetic fibers with the treatment agent for short fibers through a carding machine to obtain a carded web, and applying the method to the obtained carded web. The step of obtaining non-woven fabrics by heat welding.

In the method for producing the above-mentioned nonwoven fabric, it is preferable that the above-mentioned synthetic fibers are polyolefin-based synthetic fibers.

Invention effect According to the present invention, the water repellency and antistatic properties of synthetic fibers can be improved, and the solution stability of the treatment agent for short fibers can be improved at the same time.

(first embodiment) The treatment agent for short fibers (hereinafter simply referred to as treatment agent) which is the first embodiment of the present invention will be described.

The processing agent of this embodiment contains the following component (A), the following component (B), and the following component (C). In one aspect of this embodiment, when the total of the content ratio of a component (A), a component (B), and a component (C) is 100 parts by mass, a processing agent contains 50 parts by mass or more of a component (A). In other aspects of this embodiment, the proportion of the content of component (A) in the treatment agent exceeds 40% by mass, or is 50% by mass or more, 60% by mass or more, 70% by mass or more, 72% by mass or more, or 75% by mass. Mass% or more.

Component (A): an ester compound of a monohydric alcohol having a hydrocarbon group having 12 to 22 carbon atoms and a monohydric fatty acid having a hydrocarbon group having 12 to 22 carbon atoms.

Component (B): At least one selected from the group consisting of alkyl phosphate ester salts having an alkyl group having 16 to 22 carbon atoms and alkyl phosphate ester salts having an alkyl group having 4 to 8 carbon atoms.

Component (C): At least one selected from fatty acids having a hydrocarbon group having 12 to 22 carbon atoms and salts thereof.

When the treatment agent contains the above-mentioned components, and the total content ratio of the component (A), component (B), and component (C) is set to 100 parts by mass, the treatment agent contains 50 parts by mass or more of the component (A), As will be described later, the water repellency and antistatic properties of synthetic fibers can be improved. In addition, the solution stability of the treatment agent will be improved.

The monohydric alcohol which has a hydrocarbon group with 12-22 carbon atoms in the said component (A) may be aliphatic alcohols, and may be aromatic alcohols. In addition, straight-chain aliphatic alcohols may be used, or aliphatic alcohols having branched chains may be used. In addition, saturated aliphatic alcohols may be used, or unsaturated aliphatic alcohols may be used.

It is preferable that the above-mentioned monohydric alcohol is a straight-chain aliphatic alcohol since it does not adversely affect antistatic properties.

The carbon number of the above-mentioned monohydric alcohol is preferably 16-20.

Specific examples of the monohydric alcohol include stearyl alcohol, cetyl alcohol, oleyl alcohol, isostearyl alcohol, isotridecanol, behenyl alcohol, lauryl alcohol, tetradecyl alcohol, and the like.

The said monohydric alcohol may be used individually by 1 type, and may use it in combination of 2 or more types.

The monobasic fatty acid which has the hydrocarbon group of 12-22 carbon atoms in the said component (A) may be a saturated fatty acid, and may be an unsaturated fatty acid. In addition, straight-chain fatty acids may be used, or fatty acids having branched chains may be used.

Specific examples of the monobasic fatty acid include stearic acid, hexadecanoic acid, oleic acid, isostearic acid, behenic acid, myristic acid, and dodecanoic acid.

The said monobasic fatty acid may be used individually by 1 type, and may use it in combination of 2 or more types.

The alkyl group having a carbon number of 16 to 22 in the alkyl phosphate ester salt having an alkyl group having a carbon number of 16 to 22 in the above-mentioned component (B) may be a linear alkyl group or a branched alkyl group.

The carbon number of the above-mentioned alkyl group is preferably 16-20.

Specific examples of the above-mentioned alkyl group include octadecyl, hexadecyl, eicosyl, and the like.

The said alkyl group may be used individually by 1 type, and may use it in combination of 2 or more types.

In addition, in the alkyl phosphate ester salt having an alkyl group having a carbon number of 4 to 8 in the above-mentioned component (B), the alkyl group having a carbon number of 4 to 8 may be a linear alkyl group or an alkyl group having a branched chain.

Specific examples of the above-mentioned alkyl group include, for example, 2-ethylhexyl group, octyl group, hexyl group, butyl group and the like.

The said alkyl group may be used individually by 1 type, and may use it in combination of 2 or more types.

In addition, examples of the salt constituting the above-mentioned alkyl phosphate ester salt include amine salts and metal salts.

The amine constituting the amine salt may be any of primary amine, secondary amine, and tertiary amine. Amines constituting amine salts include, for example (1) methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, N-N-diisopropylethylamine, butylamine, dibutylamine, 2- Aliphatic amines such as methylbutylamine, tributylamine, octylamine, and dimethyllaurylamine; (2) aromatics such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and their derivatives Amines or heterocyclic amines; (3) Monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyl di Alkanolamines such as ethanolamine, octyldiethanolamine, and lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; (5) polyoxyethylene lauryl amino ether, polyoxyethylene stearyl amino ether and other polyoxyalkylene alkylamino ethers; (6) ammonia, etc.

Examples of metal salts include alkali metal salts and alkaline earth metal salts. As an alkali metal which comprises an alkali metal salt, sodium, potassium, lithium etc. are mentioned, for example. Examples of the alkaline earth metal constituting the alkaline earth metal salt include metals of Group 2 elements, such as calcium, magnesium, beryllium, strontium, and barium.

When the said metal salt is potassium, since antistatic property can be further improved, it is preferable.

The alkyl phosphate ester salt of the above-mentioned component (B) includes, for example, a homopolymer of a monoester body, a homopolymer of a diester body, and a mixture of a monoester body and a diester body. In addition, the diester body includes a diester body (symmetric diester) having the same alkyl group, a diester body (asymmetric diester) having a different alkyl group, and the like.

The fatty acid having a hydrocarbon group having 12 to 22 carbon atoms in the component (C) may be a saturated fatty acid or an unsaturated fatty acid. In addition, straight-chain fatty acids may be used, or fatty acids having branched chains may be used. It can be monobasic fatty acid or polybasic fatty acid.

In addition, the fatty acid having a hydrocarbon group having 12 to 22 carbon atoms in the component (C) is preferably a fatty acid having an unsaturated bond having 16 to 20 carbon atoms.

The fatty acid having an unsaturated bond with 16-20 carbon atoms can further improve the stability of the solution without reducing the water repellency.

Moreover, the salt of the fatty acid which has a C12-C22 hydrocarbon group in the said component (C) is mentioned, for example, is the same thing as the metal salt which comprises the said alkyl phosphate ester salt.

In addition, when the metal salt is potassium, it is preferable because antistatic properties can further be improved.

Specific examples of the fatty acid having a hydrocarbon group having 12 to 22 carbon atoms in the above-mentioned component (C) and its salt include, for example, oleic acid potassium salt, oleic acid, octadecanoic acid potassium salt, oleic acid sodium salt, behenic acid Potassium salt, potassium dodecanoate, potassium myristate, potassium hexadecanoate, etc.

The fatty acid having a hydrocarbon group having 12 to 22 carbon atoms and its salt may be used alone or in combination of two or more.

It is preferable that the above-mentioned treatment agent contains 50 to 80 parts by mass of the component (A), 50 to 80 parts by mass of the component (B), and ) 10 to 40 parts by mass, and the ratio of 1 to 10 parts by mass of the above-mentioned component (C).

It is preferable that the said processing agent is a polyoxyalkylene derivative further containing a component (D).

When the treating agent contains polyoxyalkylene derivatives, the solution stability of the treating agent is further improved.

Examples of the above-mentioned polyoxyalkylene derivatives include compounds obtained by adding alkylene oxide to alcohols or carboxylic acids, and ether/ester compounds obtained by adding alkylene oxide to ester compounds formed of carboxylic acids and polyhydric alcohols. Wait. Alcohols or carboxylic acids may be linear or branched aliphatic alcohols or carboxylic acids, or may be aromatic alcohols or carboxylic acids. In addition, saturated alcohols or carboxylic acids may be used, or unsaturated alcohols or carboxylic acids may be used. In addition, monovalent or divalent or higher alcohols or carboxylic acids may be used.

The alkylene oxide is preferably an alkylene oxide having 2 to 4 carbon atoms. Specific examples of the alkylene oxide having 2 to 4 carbon atoms include, for example, ethylene oxide, propylene oxide, butylene oxide, and the like. . Among these, ethylene oxide is preferred. The polymerization arrangement is not particularly limited, and may be a random addition product or a block addition product.

The number of moles of alkylene oxide added to 1 mole of the ester compound formed of the alcohols, carboxylic acids, or carboxylic acids and polyhydric alcohols is preferably from 5 to 100 moles. More preferably, it is 5 to 30 moles.

The above-mentioned polyoxyalkylene derivatives include, for example, polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene alkenyl esters, polyoxyalkylene Alkylalkylphenyl ether, polyoxyalkylenealkylamine, polyoxyalkylenealkenylamine, salt of polyoxyalkylenealkylamine and inorganic acid, and polyoxyalkylenealkenyl Salts of amino ethers and inorganic acids.

Specific examples of the above-mentioned polyoxyalkylene derivatives include, for example, polyoxyethylene (5 moles) oleyl ether, polyoxyethylene (10 moles) hardened castor oil ether, polyoxyethylene (20 moles) sorrel Alcohol monostearyl ester, polyoxyethylene (7 mol) oleyl ester, polyoxyethylene (7 mol) stearyl ether, etc.

The above polyoxyalkylene derivatives may be used alone or in combination of two or more.

Although the content rate of the said component (D) in a processing agent is not specifically limited, Preferably it is 5-30 mass %.

When the content ratio of the component (D) is within the above numerical value range, the solution stability of the treatment agent can be further improved without reducing the water repellency.

The above-mentioned processing agent preferably contains 60 to 80 parts by mass of the component (A), 60 to 80 parts by mass, 10-30 mass parts of components (B), 1-10 mass parts of components (C), and 5-20 mass parts of components (D).

The above-mentioned processing agent may contain a fluorine-based compound such as a perfluoroalkyl group-containing compound, or a polysiloxane compound as another component (E).

The above-mentioned fluorine-based compounds are generally used as fluorine-based surfactants for the purpose of imparting water repellency.

In addition, the above-mentioned polysiloxane compounds are generally used as oil agents with high water repellency.

Specific examples of polysiloxane compounds include, for example, dimethyl polysiloxane, phenyl modified polysiloxane, amine modified polysiloxane, amide modified polysiloxane, polyether modified polysiloxane, amine modified polysiloxane, Modified polysiloxane based polyether, modified polysiloxane alkyl, modified polysiloxane alkyl aralkyl, modified polysiloxane alkyl polyether, modified polysiloxane ester, epoxy modified polysiloxane Silicone, methanol modified polysiloxane, mercaptan modified polysiloxane, polyoxyalkylene modified polysiloxane, etc.

The content of other components (E) in the treatment agent is preferably at most 1% by mass, more preferably 0% by mass, that is, the treatment agent does not contain other components (E). When the content ratio of at least one of the fluorine-based compound and the polysiloxane compound is within the above numerical range, that is, 1 mass % or less, and further 0 mass %, the solution stability of the treatment agent can be improved.

(Second embodiment) A second embodiment of the present invention, that is, a synthetic fiber, will be described. The synthetic fiber of this embodiment adheres the processing agent of 1st embodiment. Specific examples of synthetic fibers include (1) polyolefin-based fibers such as polyethylene fibers, polypropylene fibers, and polybutylene fibers; (2) polyethylene terephthalate, polybutylene terephthalate, Polyester-based fibers such as polyethylene terephthalate, isophthalate, and polyether polyester; (3) polyamide-based fibers such as nylon 6 and nylon 66; (4) composite fibers with Composite fibers with core-sheath structure (one or both of the core and the sheath are polyolefin-based fibers, such as polyethylene/polypropylene composite fibers with the sheath of polyethylene fibers, polyethylene/polyester composite fibers , or polyethylene/polypropylene composite fibers with a side-by-side structure, polyethylene/polyester composite fibers, etc.). Among them, preferred are: polyolefin-based fibers such as polyethylene fibers, polypropylene fibers, and polybutene fibers; composite fibers with a core-sheath structure (either or both of the core and the sheath are polyolefin-based Fiber composite fibers, such as polyethylene/polypropylene composite fibers, polyethylene/polyester composite fibers with a polyethylene fiber sheath, or polyethylene/polypropylene composite fibers with a side-by-side structure, polyethylene/polyester composite fibers, etc. ).

Here, the polyolefin-based synthetic fiber means a synthetic fiber synthesized from olefin (olefine, alkene) as a monomer.

The length of the synthetic fibers is not particularly limited, but short fibers having a fiber length of about 30 mm to about 70 mm are preferred.

The amount of the treatment agent of the first embodiment attached to the synthetic fibers is not particularly limited, but it is preferably 0.1 to 2% by mass of the treatment agent (excluding solvent) to the synthetic fibers, more preferably 0.3 to 1.2% by mass. .

The method of making the treatment agent adhere to synthetic fibers, for example, can be applied to the following method: using an aqueous liquid containing the treatment agent of the first embodiment and water or a solution diluted with water, by a known method such as dipping method, spraying Adhesion by the method, the drum method, the guide oiling method using a metering pump, etc.

Among them, well-known mechanical emulsification methods such as using a stirrer or a homogenizer can be applied to the preparation of the aqueous liquid.

Using the synthetic fiber of this embodiment, the nonwoven fabric was manufactured by the following method.

Step 1: Attaching step, attaching the treating agent of the first embodiment to the synthetic fibers.

Step 2: a carding web forming step, the synthetic fiber passed through the above step 1 is passed through a carding machine to form a carding web.

Step 3: heat-welding step, performing heat-welding treatment on the carded web obtained in the above-mentioned step 2 to fuse the fibers to each other.

By passing through the above steps, a nonwoven fabric can be manufactured. Since the non-woven fabric is formed by thermally welding fibers to each other, it can also be called a thermally conductive bonded non-woven fabric.

According to the processing agent of 1st Embodiment and the synthetic fiber of 2nd Embodiment, the following effects can be acquired.

(1) When the processing agent contains the above-mentioned component (A), component (B), and component (C), and when the total content ratio of component (A), component (B), and component (C) is set to 100 In terms of parts by mass, the treatment agent contains more than 50 parts by mass of component (A), and the proportion of component (A) in the treatment agent exceeds 40 mass%, which can improve the water repellency and antistatic properties of synthetic fibers, and at the same time improve the performance of the treatment agent. solution stability. By improving the antistatic property, it is possible to improve the carding process in the manufacture of non-woven fabrics. In addition, by improving the solution stability of the treating agent, the scum in the short fiber manufacturing step can be suppressed.

(2) When the treating agent contains the polyoxyalkylene derivative of the above-mentioned component (D), the solution stability of the treating agent is further improved.

(3) Even if the content ratio of the other component (E) in the treatment agent is 1% by mass or less, the water repellency and antistatic property of the synthetic fiber can be improved. In addition, the solution stability of the treatment agent can be improved.

The above-mentioned embodiment can also be modified and implemented in the following manner. The above-described embodiment and the following modified examples can be implemented in combination with each other within a range that is not technically contradictory.

・The treatment agent can also contain stabilizers or antistatic agents, anti-charge agents, adhesives, antioxidants, ultraviolet absorbers, and defoamers for maintaining the quality of the treatment agent within the range that does not impair the effects of the present invention etc. are commonly used in the ingredients of treatment agents.

Example

Hereinafter, examples and the like are given in order to more specifically describe the configuration and effects of the present invention, but the present invention is not limited to these examples. In addition, in description of a following Example and a comparative example, % represents mass %.

Test category 1 (preparation of treatment agent for short fibers)

(Example 1) Weigh 160g of component (A-1), 25g of 40% solution of component (B1-1), 14.3g of 70% solution of component (B2-2), 20g of 20% solution of component (C-1), and 20g of component ( D-1) 10g and component (D-2) 6g were added to the beaker. Stir at a temperature equal to about 80°C to mix uniformly. Next, it stirred and mixed uniformly, adding the water of 20 degreeC in a beaker, and made it 1000g in total. Then, emulsification was carried out using a homogenizer to prepare a 20% aqueous solution of a treatment agent for short fibers.

(Examples 2-28, Reference Examples 1, 2 and Comparative Examples 1-6) Each processing agent for short fibers of Examples 2-28, Reference Examples 1 and 2, and Comparative Examples 1-6 was prepared by the method similar to Example 1 using each component shown in Table 1.

Among them, the types and contents of component (A), component (B), component (C), component (D), and other components (E) in the treatment agent of each example are shown in Table 1 "Component (A)" Column, "Ingredient (B)" column, "Ingredient (C)" column, "Ingredient (D)" column, and "Other ingredients (E)" column.

Table 1 Component (A) ingredient (B) Component (C) Component (D) Other ingredients (E) Total of all ingredients (%) Evaluation type Proportion(%) type Proportion(%) Total ratio (%) type Proportion(%) Total ratio (%) type Proportion(%) Total ratio (%) type Proportion(%) water repellency Antistatic solution stability Example 1 A-1 80 B1-1 B2-2 5 5 10 C-1 2 2 D-1 D-2 5 3 8 - - 100 ◎ ◎ ◎ Example 2 A-1 75 B1-1 B2-2 10 5 15 C-1 C-2 twenty two 4 D-1 D-2 3 3 6 - - 100 ◎ ◎ ◎ Example 3 A-2 75 B1-2 B2-2 10 5 15 C-1 C-2 twenty two 4 D-1 D-2 3 3 6 - - 100 ◎ ◎ ◎ Example 4 A-3 75 B1-1 B2-2 10 5 15 C-1 C-2 1 1 2 D-1 D-3 5 3 8 - - 100 ◎ ◎ ◎ Example 5 A-4 75 B1-1 B2-1 10 5 15 C-1 2 2 D-2 8 8 - - 100 ◎ ◎ ◎ Example 6 A-5 75 B1-2 B2-2 12 3 15 C-1 5 5 D-1 D-2 3 2 5 - - 100 ◎ ◎ ◎ Example 7 A-2 70 B1-1 B2-2 15 5 20 C-1 2.5 2.5 D-1 7.5 7.5 - - 100 ◎ ◎ ◎ Example 8 A-2 70 B1-2 B2-2 10 5 15 C-1 C-2 2.5 2.5 5 D-2 D-4 6 4 10 - - 100 ◎ ◎ ◎ Example 9 A-2 70 B1-1 B2-3 12 8 20 C-1 2 2 D-1 D-2 5 3 8 - - 100 ◎ ◎ ◎ Example 10 A-6 70 B1-1 B2-2 10 5 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 11 A-7 70 B1-1 B2-2 10 5 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 12 A-8 70 B1-1 B2-2 10 5 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ ◎ 〇 Example 13 A-9 70 B1-1 B2-2 10 5 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 〇 ◎ ◎ Example 14 A-1 70 B1-3 15 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 15 A-1 70 B1-4 15 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 16 A-1 70 B1-5 15 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 17 A-1 70 B1-1 B2-2 10 5 15 C-3 5 5 D-1 D-2 6 4 10 - - 100 ◎ ◎ 〇 Example 18 A-1 70 B1-1 B2-2 10 5 15 C-5 5 5 D-1 D-2 6 4 10 - - 100 ◎ ◎ 〇 Example 19 A-1 60 B1-4 B2-2 10 5 15 C-1 C-2 2.5 2.5 5 D-1 D-2 12 8 20 - - 100 ◎ 〇 ◎ Example 20 A-1 60 B1-2 B2-2 20 10 30 C-1 2 2 D-1 D-2 5 3 8 - - 100 〇 ◎ ◎ Example 21 A-2 60 B1-3 20 20 C-4 10 10 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 22 A-2 50 B2-3 10 10 C-6 10 10 D-1 D-2 18 12 30 - - 100 〇 ◎ ◎ Example 23 A-2 50 B1-1 B2-2 25 5 30 C-1 10 10 D-1 D-2 6 4 10 - - 100 〇 ◎ ◎ Example 24 A-2 80 B1-1 B2-2 5 3 8 C-1 2 2 D-1 D-2 6 4 10 - - 100 ◎ 〇 ◎ Example 25 A-2 72 B1-1 B2-2 12.5 5 17.5 C-1 0.5 0.5 D-1 D-2 6 4 10 - - 100 ◎ ◎ 〇 Example 26 A-2 60 B1-1 10 10 C-1 2 2 D-1 D-2 16 12 28 - - 100 ◎ 〇 ◎ Example 27 A-2 75 B1-2 B2-2 15 5 20 C-1 2.5 2.5 D-1 D-2 1.5 1 2.5 - - 100 ◎ 〇 〇 Example 28 A-5 50 B1-2 B2-2 35 5 40 C-1 10 10 - - - - - 100 ◎ 〇 〇 Reference example 1 A-5 40 B1-1 B2-2 45 5 50 C-1 10 10 - - - - - 100 〇 〇 〇 Reference example 2 A-5 40 B1-1 50 50 C-1 10 10 - - - - - 100 〇 〇 〇 Comparative example 1 - - B1-1 B2-2 80 5 85 C-1 5 5 D-1 D-2 6 4 10 - - 100 x ◎ ◎ Comparative example 2 A-1 80 - - - C-1 10 10 D-1 D-2 6 4 10 - - 100 ◎ x 〇 Comparative example 3 A-2 70 B1-1 B2-2 10 10 20 - - - D-1 D-2 6 4 10 - - 100 〇 ◎ x Comparative example 4 A-1 35 B1-3 B2-2 35 5 40 - - - D-2 10 10 E-1 15 100 ◎ 〇 x Comparative Example 5 A-1 30 B1-1 B2-2 40 10 50 - - - D-5 20 20 - - 100 x ◎ 〇 Comparative example 6 rA-1 70 B1-1 B2-2 10 5 15 C-1 5 5 D-1 D-2 6 4 10 - - 100 x ◎ 〇

A-1 to A-9, rA-1, B1-1 to B1-5, B2-1 to B2-3, C-1 to C-6, D-1 to D- described in the type column of Table 1 5. The details of each component of E-1 are as follows.

(ingredient (A)) The types and carbon numbers of monohydric alcohols having hydrocarbon groups with 12 to 22 carbons in component (A), and the types and carbon numbers of monohydric fatty acids with hydrocarbon groups with 12 to 22 carbons are shown in Table 2 "Monohydric Alcohols" "column, "unary fatty acid" column.

Table 2 Type of ingredient (A) monohydric alcohol 1 fatty acid type carbon number type carbon number A-1 stearyl alcohol 18 octadecanoic acid 18 A-2 stearyl alcohol 18 hexadecanoic acid 16 A-3 cetyl alcohol 16 octadecanoic acid 18 A-4 cetyl alcohol 16 hexadecanoic acid 16 A-5 oleyl alcohol 18 Oleic acid 18 A-6 Isostearyl alcohol 18 Isosteardecanoic acid 18 A-7 Isotridecanol 13 octadecanoic acid 18 A-8 Docosanol twenty two Docosanoic acid twenty two A-9 Lauryl Alcohol 12 Oleic acid 18 rA-1 Methanol 1 Oleic acid 18

(ingredient (B)) B1-1: Potassium Octadecyl Phosphate B1-2: Cetyl phosphate potassium salt B1-3: Sodium Octadecyl Phosphate B1-4: Octadecyl Phosphate Triethanolamine Salt B1-5: Potassium behenyl phosphate B2-1: Potassium Butyl Phosphate B2-2: Potassium Octyl Phosphate B2-3: Potassium salt of 2-ethylhexyl phosphate

The types and carbon numbers of the alkyl group with 16 to 22 carbons, the alkyl group with 4 to 8 carbons, and the type of alkyl phosphate salt in component (B) are shown in the "Alkyl" column and "Salt" column of Table 3, respectively. "column.

table 3 Type of ingredient (B) alkyl Salt type carbon number type B1-1 Octadecyl 18 Potassium B1-2 Hexadecyl 16 Potassium B1-3 Octadecyl 18 sodium B1-4 Octadecyl 18 Triethanolamine B1-5 Docosyl twenty two Potassium B2-1 Butyl 4 Potassium B2-2 Hinkie 8 Potassium B2-3 2-Ethylhexyl 8 Potassium

(ingredient (C)) C-1: Potassium Oleate C-2: Oleic acid C-3: potassium octadecanoate C-4: Sodium Oleate C-5: Potassium docosanoate C-6: Potassium dodecanoate

The types and carbon numbers of the fatty acid or its salt having a hydrocarbon group having a carbon number of 12 to 22 in the component (C) are shown in the column "Fatty acid or its salt" and "Carbon number" in Table 4, respectively.

Table 4 Type of ingredient (C) fatty acid or its salt type carbon number C-1 Potassium Oleate 18 C-2 Oleic acid 18 C-3 Potassium Octadecanoate 18 C-4 Aurein acid sodium salt 18 C-5 Potassium docosanoate twenty two C-6 Potassium dodecanoate 12

(ingredient (D)) D-1: Polyoxyethylene (5 mol) oleyl ether D-2: Polyoxyethylene (10 mol) hardened castor oil ether D-3: Polyoxyethylene (20 moles) sorbitan monostearyl ester D-4: Polyoxyethylene (7 mole) oleyl ester D-5: Polyoxyethylene (7 moles) stearyl ether

(Other ingredients (E)) E-1: Dimethicone

Test category 2 (manufacture of synthetic fibers and non-woven fabrics)

Synthetic fibers and non-woven fabrics are produced using the treatment agent for short fibers prepared in Test Category 1.

As the synthetic fiber, a polyolefin-based synthetic fiber is used, which is composed of a composite fiber in which the sheath is polyethylene and the core is polyester. The synthetic fibers are staple fibers with a fineness of 2.2 dtex and a length of 38 mm.

A 0.4% aqueous solution obtained by further diluting a 20% aqueous solution of the treatment agent for short fibers prepared in Test Category 1 was attached to 100 g of the synthetic fibers by a spray method. At this time, it adhered to the short fiber so that the solid content attachment amount might become 0.4 mass % (without solvent). Then, the synthetic fiber to which the processing agent adhered was dried for 1 hour with the hot air dryer of 80 degreeC.

20 g of the dried synthetic fibers were formed into a carded web using a known small-sized drum card under conditions of a temperature of 25° C. and a humidity of 40%. The carded web was blown with hot air at about 140° C. for 10 seconds to perform a hot air treatment to bond the fibers together to produce a nonwoven fabric with a weight of 25 g/m ² .

Trial Category 3 (Evaluation)

About each treatment agent described in Examples 1-28, Reference Examples 1 and 2, and Comparative Examples 1-6, the evaluation item of the nonwoven fabric was to evaluate water repellency. In addition, the evaluation items of manufacturability are to evaluate antistatic property and solution stability. The sequence of each test is as follows. In addition, the test results are respectively shown in the columns of "water repellency", "antistatic property" and "solution stability" in Table 1.

(water repellency) The evaluation of water repellency was carried out in accordance with the hydrostatic pressure method of JIS L 1092 7.1.1 A method (low water pressure method). As the water pressure measuring instrument, the Swiss Textest Co., Ltd. (FX3000-III) was used. The test environment is a temperature of 20±2°C and a humidity of 65±2%RH.

Take 5 pieces of nonwoven fabric (approximately 150 mm x approximately 150 mm) produced in test category 2 and install them in a water pressure tester, so that the surface side of the nonwoven fabric is in contact with water. Raise the water level at a speed of 10cm/min, and read the display value (cmw.c.) when the third drop of water appears on the inner side of the nonwoven fabric. This test was performed 5 times, and the average value of 5 times was calculated. The higher the water pressure resistance, the better the water repellency.

Among them, very small water droplets that do not become larger after the water droplets appear on the inner side of the non-woven fabric, or water droplets formed by passing through the same position are not included in the calculation.

・Evaluation criteria for water repellency ◎(Good): Water pressure resistance is above 3.0cmw.c. 〇 (acceptable): the water pressure resistance is above 1.0cmw.c. but less than 3.0cmw.c. × (Bad): The water pressure resistance is less than 1.0cmw.c.

(antistatic properties) 20 g of synthetic fibers produced in test category 2 were used to form a carding web at 25° C. and a relative humidity of 40% using a small drum carding machine. The voltage of static electricity generated on the carding wire at the outlet of the carding machine was measured, and the following evaluation criteria were used for evaluation.

・Evaluation criteria for antistatic properties ◎ (Good): The voltage that generates static electricity does not reach 500V 〇 (Acceptable): The voltage for generating static electricity is above 500V but less than 1kV × (Bad): The voltage at which static electricity is generated is 1kV or more

(solution stability) The 20% aqueous liquid of the processing agent for short fibers produced in test category 1 was further diluted, and it was prepared as a 1% aqueous liquid. This 1% aqueous solution was placed in an airtight container and left to stand for 24 hours under various temperature controls of 5°C, 20°C, and 50°C. After leaving still for 24 hours, the state of the solution was visually observed, and evaluated by the following evaluation criteria.

・Evaluation criteria for solution stability ◎ (Good): No precipitate or separation in the aqueous liquid can be seen 〇 (acceptable): There is a very small amount of precipitate or separation in the aqueous liquid × (Poor): Separation or precipitation is seen in the aqueous solution

From the results in Table 1, it can be seen that the water repellency and antistatic properties of synthetic fibers can be improved according to the present invention. In addition, the solution stability of the treating agent for short fibers can be improved.

The present invention also includes the following aspects.

(Appendix 1) A treatment agent for short fibers, characterized in that it contains the following component (A), the following component (B), and the following component (C), Component (A): an ester compound formed of a monohydric alcohol having a hydrocarbon group having 12 to 22 carbons and a monohydric fatty acid having a hydrocarbon group having 12 to 22 carbons, Component (B): At least one selected from the group consisting of alkyl phosphate ester salts having an alkyl group having 16 to 22 carbon atoms and alkyl phosphate ester salts having an alkyl group having 4 to 8 carbon atoms, Component (C): At least one selected from fatty acids having a hydrocarbon group having 12 to 22 carbon atoms and salts thereof.

(Appendix 2) The treating agent for short fibers as described in appendix 1, wherein when the total content ratio of the above-mentioned component (A), the above-mentioned component (B), and the above-mentioned component (C) is 100 parts by mass, the above-mentioned component (A) is contained 50 to 80 parts by mass, 10 to 40 parts by mass of the above-mentioned component (B), and 1 to 10 parts by mass of the above-mentioned component (C).

(Appendix 3) The treating agent for short fibers as described in appendix 1 or 2, further comprising a polyoxyalkylene derivative of component (D).

(Appendix 4) The processing agent for short fibers as described in appendix 3, wherein the content rate of the said component (D) is 5-30 mass %.

(Appendix 5) The treating agent for short fibers as described in appendix 3 or 4, wherein the total content ratio of the above-mentioned component (A), the above-mentioned component (B), the above-mentioned component (C) and the above-mentioned component (D) is 100 parts by mass , containing 60 to 80 parts by mass of the component (A), 10 to 30 parts by mass of the component (B), 1 to 10 parts by mass of the component (C), and 5 to 20 parts by mass of the component (D).

(Appendix 6) A synthetic fiber characterized in that the treatment agent for short fibers described in any one of appendices 1 to 5 is adhered.

(Appendix 7) The synthetic fiber as described in appendix 6, wherein the synthetic fiber is a polyolefin-based synthetic fiber.

(Appendix 8) A method for manufacturing a nonwoven fabric, characterized in that: through the following steps 1 to 3, Step 1: Attach the treating agent for short fibers described in any one of appendices 1 to 5 to synthetic fibers. Step 2: Pass the synthetic fibers to which the treating agent for short fibers adhered in Step 1 through a carding machine to obtain a carded web. Step 3: heat-welding the carded web obtained in Step 2 to obtain a nonwoven fabric.

(Appendix 9) The method for producing a nonwoven fabric as described in appendix 8, wherein the synthetic fibers are polyolefin-based synthetic fibers.

Claims (10)

A treatment agent for short fibers, which contains the following component (A), the following component (B), and the following component (C), when the above-mentioned component (A), the above-mentioned component (B), and the above-mentioned component (C) When the total content ratio of the above-mentioned component (A) is set as 100 mass parts, it contains 50 mass parts or more of the above-mentioned component (A), and it is characterized in that: the ratio of the content of the above-mentioned component (A) in the above-mentioned treatment agent for short fibers exceeds 40 mass %, Component (A): an ester compound formed of a monohydric alcohol having a hydrocarbon group having 12 to 22 carbons and a monovalent fatty acid having a hydrocarbon group having 12 to 22 carbons; component (B): selected from At least one of an alkyl phosphate ester salt of an alkyl group and an alkyl phosphate ester salt of an alkyl group having 4 to 8 carbon atoms, component (C): selected from fatty acids and salts thereof having a hydrocarbon group having 12 to 22 carbon atoms At least one, (wherein the following aspects are excluded: the above-mentioned short fiber treatment agent contains 10% by mass to 45% by mass of polyoxyalkylene-containing hydroxy fatty acid polyol ester and dicarboxylic acid (or dicarboxylic acid) derivatives) and/or esters in which at least one hydroxyl group in the condensates is blocked by fatty acids). The processing agent for short fibers as described in claim 1, wherein when the total content ratio of the above-mentioned component (A), the above-mentioned component (B), and the above-mentioned component (C) is set to 100 parts by mass, the above-mentioned component (A ) 50 to 80 parts by mass, 10 to 40 parts by mass of the above-mentioned component (B), and 1 to 10 parts by mass of the above-mentioned component (C). The processing agent for short fibers according to claim 1 or 2, further comprising a polyoxyalkylene derivative of component (D). The processing agent for short fibers according to claim 3, wherein the content of the component (D) is 5 to 30% by mass. The processing agent for short fibers as described in claim 3, wherein when the total content ratio of the above-mentioned component (A), the above-mentioned component (B), the above-mentioned component (C) and the above-mentioned component (D) is set to 100 parts by mass, Contains 60-80 parts by mass of the component (A), 10-30 parts by mass of the component (B), 1-10 parts by mass of the component (C), and 5-20 parts by mass of the component (D). The processing agent for short fibers as described in claim 4, wherein when the total content ratio of the above-mentioned component (A), the above-mentioned component (B), the above-mentioned component (C) and the above-mentioned component (D) is set to 100 parts by mass, Contains 60-80 parts by mass of the component (A), 10-30 parts by mass of the component (B), 1-10 parts by mass of the component (C), and 5-20 parts by mass of the component (D). A synthetic fiber characterized in that the short fiber treatment agent described in any one of Claims 1 to 6 is attached. The synthetic fiber according to claim 7, wherein the synthetic fiber is a polyolefin-based synthetic fiber. A method for manufacturing a nonwoven fabric, characterized in that: through the following steps 1 to 3; step 1: attaching the short fiber treatment agent described in any one of claims 1 to 6 on synthetic fibers, Step 2: pass the synthetic fibers to which the treatment agent for short fibers adhered in step 1 through a carding machine to obtain a carded web, and step 3: heat-weld the carded web obtained in step 2 to obtain a nonwoven fabric. The method for producing a nonwoven fabric according to claim 9, wherein the synthetic fibers are polyolefin-based synthetic fibers.