Treatment agent for polyolefin-based synthetic fiber, treatment agent composition for polyolefin-based synthetic fiber, polyolefin-based synthetic fiber, and nonwoven fabric

Abstract

To improve permeability to polyolefin-based synthetic fiber and improve emulsion stability.SOLUTION: A treatment agent for polyolefin-based synthetic fiber contains: a polyoxyalkylene derivative (A) including a monovalent polyoxyalkylene derivative (A1) described below; an anionic surfactant (B); and at least one selected from a polyether-modified silicone (C) and a polyglycerol fatty acid ester (D). The monovalent polyoxyalkylene derivative (A1) is a compound represented by the specified general formula (1), and includes three or more monovalent polyoxyalkylene derivatives each having a different number of carbon atoms in R1.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a treatment agent for polyolefin-based synthetic fibers, a treatment agent composition for polyolefin-based synthetic fibers, polyolefin-based synthetic fibers, and nonwoven fabrics. [Background technology]

[0002] In general, synthetic fibers are used as raw fibers for nonwoven fabrics. For example, nonwoven fabrics are manufactured using synthetic fibers composed of thermoplastic resins such as polyolefins. By applying a treatment agent to the nonwoven fabric, functions such as hydrophilicity are imparted. Nonwoven fabrics imparted with functions such as hydrophilicity are used in a wide range of fields, such as hygiene materials, medical care, and civil engineering.

[0003] Patent Document 1 discloses a nonwoven fabric made of synthetic fibers composed of polyolefin. A hydrophilic treatment agent is applied to the synthetic fibers as a treatment agent, and the fabric is disclosed as being used as a surface material for sanitary materials. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-201670 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the polyolefin synthetic fiber treatment agent is required to have the property of quickly penetrating into the fiber when applied to the polyolefin synthetic fiber, i.e., further improvement in the penetrability. The polyolefin synthetic fiber treatment agent is dispersed in an aqueous medium and used in the form of an emulsion. Therefore, the property of stably maintaining the form of the emulsion, i.e., further improvement in the emulsion stability, is also required. [Means for solving the problem]

[0006] The treatment agent for polyolefin-based synthetic fibers in aspect 1 comprises a polyoxyalkylene derivative (A) including the following monovalent polyoxyalkylene derivative (A1), an anionic surfactant (B), and at least one selected from a polyether-modified silicone (C) and a polyglycerin fatty acid ester (D).

[0007] Monovalent polyoxyalkylene derivative (A1): A compound represented by the following general formula (1), R 1 Contains three or more monovalent polyoxyalkylene derivatives with different carbon numbers.

[0008] [ka]

[0009] (In Chemical Formula 1, R 1 : Number of carbon atoms 22 End 50 The following hydrocarbon groups or carbon numbers: 22 End 50 The following acyl groups:

[0010] A 1 O: an alkyleneoxy group having 2 to 4 carbon atoms (the alkyleneoxy group may be one type alone or two or more types). n: An integer between 5 and 100 。

[0011] R in the above formula 1 1 The abundance ratio of monovalent polyoxyalkylene derivatives having different carbon numbers is 97 mass% or less, where α is the carbon number of the monovalent polyoxyalkylene derivative having the highest abundance ratio. Aspects 2 The aspect 1 to In the agent for treating polyolefin synthetic fibers described above, the molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) is 1.03 or more and 1.50 or less.

[0012] Aspects 3 Aspect 1 or 2In the treatment agent for polyolefin-based synthetic fibers described in 1), when the total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is taken as 100 mass%, the treatment agent contains the polyoxyalkylene derivative (A) in an amount of 10 mass% or more and 60 mass% or less, the anionic surfactant (B) in an amount of 30 mass% or more and 70 mass% or less, the polyether-modified silicone (C) in an amount of 0 mass% or more and 20 mass% or less, and the polyglycerin fatty acid ester (D) in an amount of 0 mass% or more and 30 mass% or less.

[0013] Aspects 4 The first aspect is 3 In the treatment agent for polyolefin-based synthetic fibers according to any one of the above aspects, when the total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is taken as 100 mass%, the total content of the polyoxyalkylene derivative (A) and the anionic surfactant (B) is 60 mass% or more.

[0014] Aspects 5 The polyolefin synthetic fiber treatment composition of the present invention is 4 The present invention relates to a treatment agent for polyolefin-based synthetic fibers, comprising the treatment agent for polyolefin-based synthetic fibers according to any one of the above aspects and a solvent. Aspects 6 The polyolefin synthetic fiber is 4 The present invention relates to a method for treating a polyolefin-based synthetic fiber comprising the steps of:

[0015] Aspects 7 The nonwoven fabric has the following characteristics: 6 The gist of the invention is that the material is made of the polyolefin-based synthetic fiber described in . Effect of the Invention

[0016] The treating agent for polyolefin synthetic fibers of the present invention can improve the permeability into polyolefin synthetic fibers and can also improve emulsion stability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] First Embodiment Hereinafter, a first embodiment of the treating agent for polyolefin synthetic fibers (hereinafter also referred to as treating agent) of the present invention will be described.

[0018] The treatment agent of the present embodiment contains a polyoxyalkylene derivative (A) including the following monovalent polyoxyalkylene derivative (A1), and an anionic surfactant (B), and also contains at least one selected from a polyether-modified silicone (C) and a polyglycerin fatty acid ester (D).

[0019] Monovalent polyoxyalkylene derivative (A1): A compound represented by the following general formula (1), R 1 Contains three or more monovalent polyoxyalkylene derivatives with different carbon numbers.

[0020] [ka]

[0021] (In Chemical Formula 2, R 1 : a hydrocarbon group having 16 to 60 carbon atoms, or an acyl group having 16 to 60 carbon atoms.

[0022] A 1 O: an alkyleneoxy group having 2 to 4 carbon atoms (the alkyleneoxy group may be one type alone or two or more types). n: An integer between 5 and 100. The treatment agent contains the polyoxyalkylene derivative (A) and the anionic surfactant (B) and also contains at least one selected from the group consisting of the polyether-modified silicone (C) and the polyglycerin fatty acid ester (D), thereby improving the permeability into polyolefin-based synthetic fibers and improving emulsion stability.

[0023] <Polyoxyalkylene derivative (A)> In the monovalent polyoxyalkylene derivative (A1), R 1 The hydrocarbon group having 16 to 60 carbon atoms as the alkyl group is not particularly limited, and may be a saturated or unsaturated hydrocarbon group. It may be linear or branched.

[0024] Examples of the hydrocarbon group having 16 to 60 carbon atoms include a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an icosyl group, a henicosyl group, a docosyl group, a tricosyl group, a tetracosyl group, a pentacosyl group, a hexacosyl group, a heptacosyl group, an octacosyl group, a nonacosyl group, a triacontyl group, a hentriacontyl group, a dotriacontyl group, a tritriacontyl group, a tetratriacontyl group, a pentatriacontyl group, a hexatriacontyl group, a heptatriacontyl group, an octatriacontyl group, a nonatriacontyl group, a tetracontyl group, a hentetracontyl group, a dotetracontyl group, a tritetracontyl group, a tetratetracontyl group, a pentatetracontyl group, a hexatetracontyl group, a heptatetracontyl group, an octatetracontyl group, a nonatetracontyl group, a pentacontyl group, a hexacontyl group, and the like.

[0025] In the monovalent polyoxyalkylene derivative (A1), R 1 The acyl group having 16 to 60 carbon atoms as the acyl group is not particularly limited, and may be a saturated acyl group or an unsaturated acyl group. It may be linear or branched.

[0026] Examples of the acyl group having 16 to 60 carbon atoms include a hexadecanoyl group, a heptadecanoyl group, an octadecanoyl group, a nonadecanoyl group, an icosanoyl group, a henicosanoyl group, a docosanoyl group, a tricosanoyl group, a tetracosanoyl group, a pentacosanoyl group, a hexacosanoyl group, a heptacosanoyl group, an octacosanoyl group, a nonacosanoyl group, a triacontanoyl group, a hentriacontanoyl group, a dotriacontanoyl group, a tritriacontanoyl group, a tetratriacontanoyl group, a pentacosanoyl group, a Examples of such groups include a riacontanoyl group, a hexatriacontanoyl group, a heptatriacontanoyl group, an octatriacontanoyl group, a nonatriacontanoyl group, a tetracontanoyl group, a hentetracontanoyl group, a dotetracontanoyl group, a tritetracontanoyl group, a tetratetracontanoyl group, a pentatetracontanoyl group, a hexatetracontanoyl group, a heptatetracontanoyl group, an octatetracontanoyl group, a nonatetracontanoyl group, a pentacontanoyl group, and a hexacontanoyl group.

[0027] R 1 The number of carbon atoms in R is preferably 22 or more and 50 or less. 1 When the carbon number of is 22 or more and 50 or less, the durable hydrophilicity of the nonwoven fabric to which the treatment agent is attached can be improved.

[0028] The monovalent polyoxyalkylene derivative (A1) is a compound represented by Chemical Formula 2, where R 1 It is preferable that the polyoxyalkylene derivatives contain 45 or less kinds of monovalent polyoxyalkylene derivatives having different carbon numbers.

[0029] In the monovalent polyoxyalkylene derivative (A1), R 1The ratio of monovalent polyoxyalkylene derivatives having different carbon numbers is preferably 97% by mass or less in total of the carbon numbers (α-4) to (α+4), where α is the carbon number of the monovalent polyoxyalkylene derivative having the highest carbon number. By having the total ratio of the carbon numbers (α-4) to (α+4) being 97% by mass or less, the permeability of the treatment agent into polyolefin synthetic fibers can be further improved. In addition, the emulsion stability of the treatment agent can be further improved.

[0030] In the monovalent polyoxyalkylene derivative (A1), A 1 Examples of the alkyleneoxy group having 2 to 4 carbon atoms as O include an ethyleneoxy group, a propyleneoxy group, and a butyleneoxy group.

[0031] The alkyleneoxy group may be one type alone or two or more types. When a plurality of such alkyleneoxy groups are present, the polymerization sequence is not particularly limited, and may be a random addition product or a block addition product.

[0032] The molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) is preferably 1.03 or more and 1.50 or less. By having the molecular weight distribution (Mw / Mn) of 1.03 or more and 1.50 or less, the permeability of the treatment agent into the polyolefin synthetic fiber can be further improved. In addition, the emulsion stability of the treatment agent can be further improved. The method for measuring the molecular weight distribution (Mw / Mn) will be described later.

[0033] <Anionic surfactant (B)> As the anionic surfactant (B), any known surfactant can be appropriately used. Examples of the anionic surfactant (B) include: (1) phosphoric acid ester salts of aliphatic alcohols, such as lauryl phosphate salts, cetyl phosphate salts, octyl phosphate salts, oleyl phosphate salts, and stearyl phosphate salts; (2) phosphoric acid ester salts of aliphatic alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide has been added, such as polyoxyethylene lauryl ether phosphate salts, polyoxyethylene oleyl ether phosphate salts, and polyoxyethylene stearyl ether phosphate salts; (3) aliphatic sulfonates or aromatic sulfonates, such as lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecane sulfonate, dodecyl benzene sulfonate, and secondary alkyl sulfonate (C13-15); (4) sulfate ester salts of aliphatic alcohols, such as lauryl sulfate salts, oleyl sulfate salts, and stearyl sulfate salts; (5) polyoxyethylene lauryl ether sulfate salts, poly (6) sulfates of fatty alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide has been added, such as oxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate and polyoxyethylene oleyl ether sulfate; (7) castor oil fatty acid sulfate, sesame oil fatty acid sulfate, tall oil fatty acid sulfate, soybean oil fatty acid sulfate, rapeseed oil fatty acid sulfate, palm oil fatty acid sulfate, lard fatty acid sulfate; (7) sulfate salts of fats and oils, such as sulfate salts of castor oil, sulfate salts of sesame oil, sulfate salts of tall oil, sulfate salts of soybean oil, sulfate salts of rapeseed oil, sulfate salts of palm oil, sulfate salts of lard, sulfate salts of beef tallow, and sulfate salts of whale oil; (8) fatty acid salts, such as laurates, oleates, and stearates; (9) sulfosuccinate salts of fatty alcohols, such as dioctyl sulfosuccinate;(10) Carboxylic acid ester salts of an aliphatic alcohol to which at least one alkylene oxide selected from ethylene oxide and propylene oxide has been added.

[0034] Examples of the counter ion of the anionic surfactant (B) include alkali metal salts such as potassium salts and sodium salts, ammonium salts, and alkanolamine salts such as triethanolamine.

[0035] The anionic surfactant (B) may be used alone or in combination of two or more kinds. <Polyether-modified silicone (C)> The polyether-modified silicone (C) may be any known silicone. Examples of the polyether-modified silicone (C) include ABn-type polyether-modified silicone, side-chain-type polyether-modified silicone, both-end-type polyether-modified silicone, alkyl polyether-modified silicone in which both a polyether group and an alkyl group are introduced into the side chain or end, side-chain-type polyether-modified silicone in which the polyether chain end portion is blocked with an aliphatic compound or a fatty acid compound, and both-end-type polyether-modified silicone in which the polyether chain end portion is blocked with an aliphatic compound or a fatty acid compound.

[0036] The polyether-modified silicone (C) may be a commercially available product that is specified by its kinetic viscosity. The kinetic viscosity is set as appropriate, but it is generally preferred that the kinetic viscosity at 25°C is 100 cst (mm 2 / s) or more 10000cst(mm) 2 / s) or less, and 500cst (mm 2 / s) or more 7000cst(mm) 2 / s) or less is more preferable.

[0037] The mass average molecular weight (Mw) of the polyether-modified silicone (C) is not particularly limited, but is preferably 1,000 or more and 100,000 or less, and more preferably 3,000 or more and 60,000 or less.

[0038] The weight average molecular weight (Mw) of the polyether-modified silicone (C) is determined by gel permeation chromatography (hereinafter also referred to as "GPC method"). The details of the GPC method will be described later.

[0039] The polyether-modified silicone (C) may be used alone or in combination of two or more kinds. <Polyglycerol fatty acid ester (D)> The polyglycerol fatty acid ester (D) is preferably an ester of an aliphatic monocarboxylic acid and polyglycerol.

[0040] The aliphatic monocarboxylic acid preferably has a carbon number of 16 or more and 18 or less. Examples of the aliphatic monocarboxylic acid having a carbon number of 16 or more and 18 or less include hexadecanoic acid, heptadecanoic acid, and octadecanoic acid.

[0041] The number of moles of the aliphatic monocarboxylic acid in one ester molecule is preferably 1 or more and 4 or less. Examples of polyglycerin include diglycerin, triglycerin, tetraglycerin, pentaglycerin, hexaglycerin, heptaglycerin, and octaglycerin.

[0042] The number of moles of polyglycerin in one ester molecule is preferably 1. The condensation degree of the polyglycerol is preferably 2 or more and 8 or less. The polyglycerol fatty acid ester (D) may be used alone or in combination of two or more kinds.

[0043] <Content of each ingredient> The content ratio of each of the above components in the treatment agent is not particularly limited. The total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is 100% by mass. It is preferable that the polyoxyalkylene derivative (A) is contained in an amount of 10% by mass to 60% by mass, and the anionic surfactant (B) is contained in an amount of 30% by mass to 70% by mass. It is also preferable that the polyether-modified silicone (C) is contained in an amount of 0% by mass to 20% by mass, and the polyglycerin fatty acid ester (D) is contained in an amount of 0% by mass to 30% by mass.

[0044] By making the content ratio of each component within the above numerical range, the permeability of the treatment agent into the polyolefin-based synthetic fiber can be further improved. The emulsion stability of the treatment agent can also be further improved. Furthermore, the initial hydrophilicity of the nonwoven fabric to which the treatment agent is attached can be improved. The rewetting prevention property of the nonwoven fabric to which the treatment agent is attached can also be improved.

[0045] When the total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is taken as 100% by mass, the total content of the polyoxyalkylene derivative (A) and the anionic surfactant (B) is preferably 60% by mass or more. By having the content of each component within the above numerical range, the emulsion stability of the treatment agent can be further improved.

[0046] <Other ingredients (E)> The treatment agent of this embodiment may contain other components (E). Examples of other components (E) include polyethylene with an average carbon number of 22 and a distribution of 18 to 26 carbon atoms, polyethylene with an average carbon number of 30 and a distribution of 14 to 58 carbon atoms, polyethylene with a carbon number of 30, citric acid, olive oil RR (Summit Oil Mills), shea butter RF (Kyoto Alcohol Industry Co., Ltd.), rice oil (Tsukuno Foods Industry Co., Ltd.), Ecofarm Cucumber E (Ichimaru Pharcos Co., Ltd.), peach leaf extract LA (Maruzen Pharmaceutical Co., Ltd.), refined coconut oil (S) (Nisshin Oillio Group, Inc.), aloe extract BG-50 (Koei Kogyo Co., Ltd.), and jojoba oil (Summit Oil Mills).

[0047] The other components (E) may be used alone or in combination of two or more. The content of the other component (E) in the treatment agent is not particularly limited. The content of the other component (E) is preferably 15% by mass or less, more preferably 5% by mass or less, and even more preferably 2% by mass or less, when the total mass of the treatment agent including the other component (E) is 100% by mass.

[0048] <Second embodiment> A second embodiment of the treating agent composition for polyolefin-based synthetic fibers (hereinafter, also referred to as the composition) of the present invention will be described below.

[0049] The composition of the present embodiment contains the above-mentioned treatment agent and a solvent. The composition is used as an emulsion by mixing the treatment agent and the solvent. The solvent is not particularly limited, and may be, for example, water. A specific example of water is ion-exchanged water. In addition to water, an organic solvent may be contained. A specific example of the organic solvent is a lower alcohol such as ethanol or propanol, or a low polarity solvent such as hexane.

[0050] The above solvents may be used alone or in combination of two or more. <Third embodiment> A third embodiment of the polyolefin synthetic fiber of the present invention will now be described.

[0051] The polyolefin synthetic fiber of this embodiment has the treatment agent of the first embodiment adhered thereto. Here, the polyolefin synthetic fiber means a synthetic fiber synthesized using an olefin or an alkene as a monomer. Hereinafter, the polyolefin synthetic fiber may also be simply referred to as a synthetic fiber.

[0052] Specific examples of synthetic fibers include polyethylene fibers, polypropylene fibers, and polybutene fibers. These may be used alone or in combination of two or more. Furthermore, as polypropylene fibers, modified polypropylene fibers obtained by copolymerizing various monomers, composite polypropylene fibers of polyethylene and polypropylene, etc. may be used.

[0053] The fiber may also be a composite fiber having a core-sheath structure in which either or both of the core and the sheath are polyolefin-based fibers, such as a polyethylene / polypropylene composite fiber or a polyethylene / polyester composite fiber in which the sheath is a polyethylene fiber.

[0054] The method for applying the treatment agent to the synthetic fibers is not particularly limited, and the treatment agent can be applied by a known method, for example, a dipping method, a spraying method, etc. It is preferable to apply the treatment agent to a nonwoven fabric after producing the nonwoven fabric using the synthetic fibers.

[0055] The amount of the treatment agent applied is preferably 0.1% to 2% by mass, and more preferably 0.3% to 1.2% by mass, of the synthetic fibers (excluding the solvent).

[0056] <Fourth embodiment> A nonwoven fabric according to a fourth embodiment of the present invention will now be described, which is made from the synthetic fiber of the third embodiment.

[0057] The method for producing the nonwoven fabric is not particularly limited, and known methods can be used. For example, the method for producing the nonwoven fabric includes forming a web by air-laid method, spunbond method, papermaking method, carding method, etc. using synthetic fibers before the treatment agent is attached. Furthermore, the fibers of the obtained web are bonded to each other by chemical bonding, air-through, needle punching, spunlace, etc. to produce a nonwoven fabric. By attaching a treatment agent to the obtained nonwoven fabric, a nonwoven fabric with the treatment agent attached can be obtained.

[0058] <Action and Effects> The operation of the above embodiment will be described. The monovalent polyoxyalkylene derivative (A1) is a compound represented by Chemical Formula 2, where R 1 The compound contains three or more monovalent polyoxyalkylene derivatives with different carbon numbers. 1 R is a hydrocarbon group having 16 to 60 carbon atoms, or an acyl group having 16 to 60 carbon atoms. 1 is a hydrocarbon group having 16 to 60 carbon atoms or an acyl group having 16 to 60 carbon atoms, so that the alkyl chain of the monovalent polyoxyalkylene derivative (A1) has a predetermined length. 1 By containing three or more types of monovalent polyoxyalkylene derivatives having different carbon numbers, the length of the alkyl chain of the monovalent polyoxyalkylene derivative (A1) has a distribution.

[0059] The alkyl chain length of the monovalent polyoxyalkylene derivative (A1) has a predetermined length and has a distribution, so that the hydrophilicity of the treatment agent containing the polyoxyalkylene derivative (A) can be made suitable. By making the hydrophilicity of the treatment agent suitable, the emulsion stability of the treatment agent can be improved, and the permeability into polyolefin-based synthetic fibers can be improved.

[0060] Furthermore, by including the anionic surfactant (B) in the treatment agent, the emulsion stability of the treatment agent and its permeability into polyolefin-based synthetic fibers can be further improved. In addition, by including in the treatment agent at least one selected from the polyether-modified silicone (C) and the polyglycerol fatty acid ester (D), it is possible to further improve emulsion stability, and also to improve initial hydrophilicity and durable hydrophilicity.

[0061] According to the above embodiment, the following effects can be obtained. (1) The treatment agent contains a polyoxyalkylene derivative (A) containing a monovalent polyoxyalkylene derivative (A1) and an anionic surfactant (B). It also contains at least one selected from a polyether-modified silicone (C) and a polyglycerin fatty acid ester (D). Therefore, it is possible to improve the permeability into polyolefin-based synthetic fibers. It is also possible to improve the emulsion stability.

[0062] (2) In the monovalent polyoxyalkylene derivative (A1), R in Chemical Formula 2 1 The number of carbon atoms in R is 22 or more and 50 or less. 1 When the carbon number of is 22 or more and 50 or less, the durable hydrophilicity of the nonwoven fabric to which the treatment agent is attached can be improved.

[0063] (3) In the monovalent polyoxyalkylene derivative (A1), the number of carbon atoms of the monovalent polyoxyalkylene derivative having the highest abundance ratio is defined as α. In this case, R in Chemical Formula 2 1 In the ratio of monovalent polyoxyalkylene derivatives having different carbon numbers, the total ratio of the monovalent polyoxyalkylene derivatives having carbon numbers (α-4) to (α+4) is 97% by mass or less. Therefore, the permeability of the treatment agent into polyolefin synthetic fibers can be improved. In addition, the emulsion stability of the treatment agent can be improved.

[0064] (4) The molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) is 1.03 or more and 1.50 or less. This can improve the permeability of the treatment agent into polyolefin-based synthetic fibers. In addition, the emulsion stability of the treatment agent can be improved.

[0065] (5) The total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is 100% by mass. The treatment agent contains the polyoxyalkylene derivative (A) in a ratio of 10% by mass to 60% by mass, and the anionic surfactant (B) in a ratio of 30% by mass to 70% by mass. The treatment agent also contains the polyether-modified silicone (C) in a ratio of 0% by mass to 20% by mass, and the polyglycerin fatty acid ester (D) in a ratio of 0% by mass to 30% by mass. Therefore, the permeability of the treatment agent into the polyolefin-based synthetic fiber can be further improved. The emulsion stability of the treatment agent can also be further improved. Furthermore, the initial hydrophilicity of the nonwoven fabric to which the treatment agent is attached can be improved. The anti-wetting property of the nonwoven fabric to which the treatment agent is attached can also be improved.

[0066] (6) The total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is taken as 100% by mass. The total content of the polyoxyalkylene derivative (A) and the anionic surfactant (B) is 60% by mass or more. Therefore, the emulsion stability of the treatment agent can be further improved.

[0067] <Example of change> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0068] The treatment agent may contain components that are typically used in treatment agents, such as stabilizers for maintaining the quality of the treatment agent, antistatic agents, antistatic agents, binders, antioxidants, ultraviolet absorbers, and defoamers (silicone-based compounds), within the scope of not impairing the effects of the present invention. EXAMPLES

[0069] In the following, examples will be given in order to more specifically explain the configuration and effects of the present invention, but the present invention is not limited to these examples. , reference example, And in the comparative examples, % means % by mass and parts means parts by mass.

[0070] Test Category 1 (Preparation of treatment agent for polyolefin synthetic fibers) Example 1 The components shown in Table 1 were added to a beaker so that the polyoxyalkylene derivative (A) was 32%, the anionic surfactant (B) was 54%, the polyether-modified silicone (C) was 13%, and the other components (E) were 1%. These were stirred and mixed well. While continuing to stir, ion-exchanged water was gradually added so that the solid concentration was 5%, and a 5% aqueous solution of the polyolefin-based synthetic fiber treatment agent of Example 1 was prepared.

[0071] (Example 2 31、38~49、 51 , Reference examples 32-37, 50, and Comparative Examples 1 to 8) Example 2 31、38~49、 51 , Reference examples 32-37, 50, Each of the treating agents for polyolefin-based synthetic fibers in Comparative Examples 1 to 8 was prepared in the same manner as in Example 1 using the components shown in Tables 1 to 4.

[0072] The type and content of the polyoxyalkylene derivative (A), the type and content of the anionic surfactant (B), the type and content of the polyether-modified silicone (C), the type and content of the polyglycerin fatty acid ester (D), and the type and content of the other component (E) in the treatment agent of each example are as shown in the "Polyoxyalkylene derivative (A)" column, the "Anionic surfactant (B)" column, the "Polyether-modified silicone (C)" column, the "Polyglycerin fatty acid ester (D)" column, and the "Other compounds (E)" column in Tables 1 to 4, respectively.

[0073] [Table 1]

[0074] [Table 2]

[0075] [Table 3]

[0076] [Table 4]

[0077] Details of each component shown in Tables 1 to 4 are as follows. (Polyoxyalkylene derivative (A)) Details of the monovalent polyoxyalkylene derivatives A1-1 to A1-13 and A-14 to A-19 shown in Tables 1 to 4 are as follows.

[0078] Regarding A1-1 to A1-13, A-14 to A-18, R 1 The types, carbon number distribution, and number of those with 22 or more carbons are shown in Table 5 under "R 1 The carbon number (α) of the monovalent polyoxyalkylene derivative with the highest abundance ratio is shown in the "α" column of Table 5. The total abundance ratio of the monovalent polyoxyalkylene derivative with carbon numbers (α-4) or more and (α+4) or less is shown in the "Total Abundance Ratio" column of Table 5.1 The average values ​​of the types of O, the addition form, and the number of n are shown in Table 5. 1 The molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) is shown in the "Molecular weight distribution" column of Table 5.

[0079] Details of the A-19 are as follows: A-19: A compound in which 20 moles of ethylene oxide are added to 1 mole of sorbitan monostearate.

[0080] [Table 5]

[0081] In Table 5, the EO group and the PO group respectively represent an ethyleneoxy group and a propyleneoxy group. The method for measuring the molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) will be described. The molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) was measured under the following measurement conditions based on the GPC method.

[0082] Equipment: Tosoh HLC-8320GPC Column: TSK gel Super H4000 :TSK gel Super H3000 :TSK gel Super H2000 (both manufactured by Tosoh Corporation) Column temperature: 40℃ Detector: Differential refractive index detector Sample solution: 0.25% by mass tetrahydrofuran solution Solution flow rate: 0.5mL / min Solution injection volume: 10μL Standard sample: Polystyrene (TSK STANDARD POLYSTYRENE manufactured by Tosoh Corporation) A calibration curve was created using a standard sample, and each example , reference example,The number average molecular weight (Mn) and the mass average molecular weight (Mw) of the mixture of polyoxyalkylene derivatives blended in the treatment agent of the comparative example were determined, and the molecular weight distribution (Mw / Mn) was calculated using the values.

[0083] (Anionic Surfactant (B)) Details of the anionic surfactants B-1 to B-8 described in Tables 1 to 4 are shown in Table 6.

[0084] [Table 6]

[0085] In Table 6, the acid value of the anionic surfactant (B) can be measured by a known method. (Polyether modified silicone (C)) Details of the polyether-modified silicones C-1 to C-6 shown in Tables 1 to 4 are shown in Table 7.

[0086] For C-1 to C-6, the type of end group is shown in the "End" column. The mass ratio of the mass average molecular weight of the polyether modified silicone excluding the alkylene oxide is shown in the "Si%" column. The molar ratio of ethylene oxide in the alkylene oxide is shown in the "EO% (molar ratio)" column. The addition form of the alkylene oxide is shown in the "Addition form" column. The kinetic viscosity of the polyether modified silicone is shown in the "Kinematic viscosity" column. The mass average molecular weight of the polyether modified silicone is shown in the "Mass average molecular weight" column.

[0087] [Table 7]

[0088] In Table 7, EO and PO stand for ethylene oxide and propylene oxide, respectively. The method for measuring the mass average molecular weight (Mw) of the polyether-modified silicone (C) will be described.

[0089] The mass average molecular weight (Mw) of the polyether-modified silicone was measured under the same measurement conditions as the molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1). A calibration curve was created using a standard sample, and the mass average molecular weight (Mw) of each polyether-modified silicone was determined.

[0090] (Polyglycerol fatty acid ester (D)) Details of polyglycerol fatty acid esters D-1 to D-52 listed in Tables 1 to 4 are shown in Table 8. For D-1 to D-52, the name of the aliphatic monocarboxylic acid, the number of carbon atoms, and the number of moles per ester molecule are shown in the "Aliphatic carboxylic acid" column. The name of the polyglycerin, the degree of condensation, and the number of moles per ester molecule are shown in the "Polyglycerin" column.

[0091] [Table 8]

[0092] (Other ingredients (E)) Details of the other components E-1 to E-12 shown in Tables 1 to 4 are shown in Table 9.

[0093] [Table 9]

[0094] Test Category 2 (Manufacturing of polyolefin-based synthetic fibers and nonwoven fabrics) Using the treatment agent for polyolefin synthetic fibers prepared in Test Section 1, polyolefin synthetic fibers and nonwoven fabrics were produced.

[0095] First, the 5% aqueous solution of the polyolefin synthetic fiber treatment agent prepared in Test Section 1 was diluted with hard water to obtain an aqueous solution with a concentration of 0.25%. Using this aqueous solution, a treatment bath at a bath temperature of 25°C was prepared.

[0096] In addition, a spunbond nonwoven fabric (basis weight 20 g / m) made using polypropylene fiber as a polyolefin synthetic fiber was 2 ) was prepared. The spunbond nonwoven fabric was immersed in the treatment bath for 5 minutes, removed, and squeezed with a mangle at an adjusted squeezing rate so that the amount of the aqueous liquid attached was 4 g per 2 g of polypropylene spunbond nonwoven fabric. Thereafter, the fabric was dried by blowing air at 80° C. for 30 minutes to prepare a nonwoven fabric for evaluation (hereinafter also referred to as the nonwoven fabric for evaluation).

[0097] The amount of the treatment agent attached to the polyolefin synthetic fiber was 0.5% per 1 g of polypropylene spunbond nonwoven fabric. The amount of the treatment agent attached to the polyolefin synthetic fiber was measured by extracting the nonwoven fabric with a mixed solvent of methanol / xylene (50 / 50 volume ratio) using a Soxhlet extractor.

[0098] Test category 3 (evaluation) Example 1 31、38~49、 51 , Reference examples 32-37, 50, For each of the treatment agents described in Comparative Examples 1 to 8, the emulsion was evaluated for its permeability into the nonwoven fabric and its emulsion stability. The nonwoven fabric was evaluated for its initial hydrophilicity, durable hydrophilicity, and anti-wetting property. The procedures for each test are shown below. The test results are shown in the "Emulsion Evaluation Items" and "Nonwoven Fabric Evaluation Items" columns of Tables 1 to 4, respectively.

[0099] (permeability) Each Example , reference example, The treatment agent of the comparative example was heated to about 75°C. Each heated treatment agent was added to ion-exchanged water heated to about 75°C under stirring to prepare a 0.35% aqueous solution of the treatment agent. Next, a polypropylene spunbond nonwoven fabric to which no treatment agent was applied was conditioned for 24 hours in a thermostatic chamber at 20°C and a relative humidity of 60%. 5 μL of a 0.35% aqueous solution of each treatment agent was dropped onto the conditioned nonwoven fabric. The state of the treatment agent permeating into the nonwoven fabric was visually observed. The time until the treatment agent completely permeated was measured and evaluated according to the following evaluation criteria. The permeability is also called wettability.

[0100] Penetration evaluation criteria ◎ (Good): Penetration in less than 160 seconds ○ (OK): Penetration in 160 seconds or more and less than 180 seconds × (Not acceptable): If it penetrates for 180 seconds or more (Emulsification stability) Each Example , reference example, The treatment agent of the comparative example was diluted with ion-exchanged water to prepare a diluted solution (emulsion) with a non-volatile content concentration of 1.0%. The temperature was adjusted to 20°C, and the diluted solution after 24 hours was visually observed to confirm the presence or absence of separation. In addition, the light transmittance (%) at a wavelength of 750 nm was measured using the diluted solution under constant temperature conditions of 20°C and relative humidity of 60%. The measurement device used was a spectrophotometer UV-1800 SPECTROPHOTOMETER manufactured by Shimadzu Corporation. Evaluation was based on the following evaluation criteria.

[0101] ·Evaluation criteria for emulsion stability ◎ (Good): No separation and light transmittance of 85% or more ○(Acceptable): No separation and light transmittance is 50% or more and less than 85% × (Not acceptable): Separation occurs or light transmittance is less than 50%. (Initial hydrophilicity) The nonwoven fabric for evaluation was cut into small pieces of 10 cm x 15 cm, and then conditioned for 24 hours in a thermostatic chamber at 20°C and 60% humidity. Ten sheets of commercially available toilet paper were stacked to form an absorbent. The nonwoven fabric for evaluation after conditioning was placed on top of this absorbent. After placing the absorbent and the nonwoven fabric for evaluation on a 45° inclined plate, 0.05 g of saline solution at 37°C was dropped from a height of 1 cm above the nonwoven fabric. On the surface of the nonwoven fabric for evaluation, the flow length, which is the length of saline solution flowing from the drop point to the end of absorption, was measured. The same test was performed five times, and the average value was taken as the 45° inclined flow length. Evaluation was performed according to the following evaluation criteria.

[0102] Evaluation criteria for initial hydrophilicity ◎(Good): When the 45° inclination flow length is less than 30 mm ○(OK): When the 45° inclination flow length is 30mm or more and less than 50mm × (Not acceptable): When the 45° inclination flow length is 50 mm or more (durable hydrophilic) The nonwoven fabric for evaluation was cut into small pieces of 10 cm x 25 cm, and then conditioned for 24 hours in a thermostatic chamber at 20 ° C and 60% humidity. Ten sheets of commercially available toilet paper were stacked to form an absorbent. The nonwoven fabric for evaluation after conditioned humidity was placed on this absorbent. A 414 g stainless steel plate with 20 holes of 2 cm diameter at equal intervals was placed on the nonwoven fabric for evaluation. 0.05 g of 37 ° C saline was dropped into the 20 holes from a height of 1 cm above the nonwoven fabric for evaluation. The number of holes in which saline was absorbed within 10 seconds was counted. After 3 minutes, saline was similarly dropped, and the number of holes in which saline was absorbed within 10 seconds was counted. The same operation was repeated. After the fifth drop, the number of holes in which absorption was measured within 10 seconds was counted and evaluated according to the following evaluation criteria.

[0103] Evaluation criteria for durable hydrophilicity ◎ (Good): 18 or more holes absorbed within 10 seconds after the fifth drop ○ (OK): The number of holes absorbed within 10 seconds after the fifth drop is 12 to 18. × (Fail): Less than 12 holes were absorbed within 10 seconds after the fifth drop. (Prevents re-wetting) The nonwoven fabric for evaluation was cut into small pieces of 10 cm x 10 cm, and then conditioned for 24 hours in a thermostatic chamber at 20°C and 60% humidity. A 10 cm x 10 cm piece of nonwoven fabric was cut out from the outermost nonwoven fabric material of a commercially available disposable diaper. The conditioned 10 cm x 10 cm piece was attached to the cut out part to prepare a sample for evaluating rewetting prevention.

[0104] The test sample for evaluating the rewetting prevention property was placed horizontally with the attached strip facing upward, and a cylinder with an inner diameter of 6 cm and open ends was placed vertically in the center of the strip. 80 ml of water was poured into the cylinder and left to stand for 5 minutes to allow the water to be absorbed into the paper diaper.

[0105] Next, after removing the cylinder, 15 sheets of 10cm x 10cm filter paper were placed on the small piece. A 5.0kg weight plate measuring 10cm x 10cm was placed on top of the filter paper and applied for 2 minutes. The total mass of the 15 sheets of filter paper was then measured, and the rate of increase in mass was calculated and evaluated according to the following criteria.

[0106] ·Evaluation criteria for re-wetting prevention ◎ (Good): Mass increase rate is less than 1% ○(OK): Mass increase rate is 1% or more and less than 2% × (Not acceptable): When the mass increase rate is 2% or more From the results in Tables 1 to 4, according to the present invention, it is possible to improve the permeability of the treatment agent into polyolefin-based synthetic fibers, and also to improve the emulsion stability of the treatment agent. It is also possible to improve the initial hydrophilicity, durable hydrophilicity, and rewetting prevention properties of the nonwoven fabric to which the treatment agent is attached.

Claims

1. The composition contains a polyoxyalkylene derivative (A) containing the following monovalent polyoxyalkylene derivative (A1), and an anionic surfactant (B), A treatment agent for polyolefin-based synthetic fibers, comprising at least one selected from the group consisting of a polyether-modified silicone (C) and a polyglycerol fatty acid ester (D). Monovalent polyoxyalkylene derivative (A1): A compound represented by the following general formula (1), R １ The monovalent polyoxyalkylene derivatives include three or more monovalent polyoxyalkylene derivatives having different carbon numbers. 【Chemistry 1】 (In Chemical Formula 1, R １ : a hydrocarbon group having 16 to 60 carbon atoms, or an acyl group having 16 to 60 carbon atoms. A １ O: an alkyleneoxy group having 2 to 4 carbon atoms (the alkyleneoxy group may be one type alone or two or more types). n: an integer between 5 and 100.

2. In the monovalent polyoxyalkylene derivative (A1), R １ 2. The agent for treating polyolefin synthetic fibers according to claim 1, wherein the carbon number of the alkyl group is from 22 to 50.

3. In the monovalent polyoxyalkylene derivative (A1), R １ The agent for treating polyolefin synthetic fibers according to claim 1, wherein the total abundance ratio of monovalent polyoxyalkylene derivatives having carbon numbers of (α-4) or more and (α+4) or less is 97 mass% or less, where α is the carbon number of the monovalent polyoxyalkylene derivative having the largest abundance ratio.

4. 2. The agent for treating polyolefin synthetic fibers according to claim 1, wherein the molecular weight distribution (Mw / Mn) of the monovalent polyoxyalkylene derivative (A1) is 1.03 or more and 1.50 or less.

5. 2. The treatment agent for polyolefin-based synthetic fibers according to claim 1, wherein the treatment agent contains the polyoxyalkylene derivative (A) in an amount of 10% by mass or more and 60% by mass or less, the anionic surfactant (B) in an amount of 30% by mass or more and 70% by mass or less, the polyether-modified silicone (C) in an amount of 0% by mass or more and 20% by mass or less, and the polyglycerol fatty acid ester (D) in an amount of 0% by mass or more and 30% by mass or less, when the total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerol fatty acid ester (D) is taken as 100% by mass.

6. 2. The treatment agent for polyolefin-based synthetic fibers according to claim 1, wherein the total content of the polyoxyalkylene derivative (A) and the anionic surfactant (B) is 60% by mass or more when the total content of the polyoxyalkylene derivative (A), the anionic surfactant (B), the polyether-modified silicone (C), and the polyglycerin fatty acid ester (D) is taken as 100% by mass.

7. A composition for treating polyolefin synthetic fibers, comprising the treating agent for polyolefin synthetic fibers according to any one of claims 1 to 6 and a solvent.

8. 7. A polyolefin synthetic fiber having the treating agent for polyolefin synthetic fibers according to any one of claims 1 to 6 adhered thereto.

9. A nonwoven fabric made from the polyolefin synthetic fiber according to claim 8.

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