JP6682501B2 - Treatment agent for elastic fiber and its use - Google Patents

Description

  The present invention relates to an elastic fiber treating agent and an elastic fiber to which the treating agent is applied. More specifically, the present invention relates to a treatment agent for elastic fibers, which has excellent process passage properties suitable for use in rubber parts of sanitary materials such as disposable diapers and sanitary treatment products, and excellent adhesiveness to hot melt adhesives.

The elastic fiber used as the rubber part of the sanitary material by adhering it with a thermoplastic resin between the superposed cloths is required to have good adhesiveness with the hot melt adhesive. For this reason, when a conventional treatment agent is added for the purpose of improving the process passability such as unwinding property and smoothness of the elastic fiber, there is a problem that the adhesiveness is lowered and the function as a rubber portion is impaired. However, it was difficult to achieve both process passability and adhesiveness.
In recent years, along with the speeding up of the manufacturing process of the rubber part of sanitary materials and clothing, it is necessary to improve the process passability of elastic fibers, and various treatment agents for elastic fibers have been proposed.

As an example, Patent Document 1 describes a treating agent containing a polypropylene glycol-based polyol and a reaction product of a polypropylene glycol-based polyol and an organic diisocyanate compound. However, the adhesion of the treating agent is deteriorated and the smoothness is low. It may not be enough.
Further, in Patent Document 2, for a diaper, a treatment agent containing 70 to 90% by weight of mineral oil and 10 to 30% by weight of polydimethylsiloxane is attached to the elastic yarn in an amount of 2.5 to 5% by weight. Although a polyurethane elastic thread wound body is described, adhesiveness may be insufficient.

JP 2001-316974 A JP-A-2002-205876

As described above, in the prior art, there are cases in which one of the adhesiveness with the hot melt adhesive, the unwinding property and the smoothness is not sufficient, and there has been a strong demand for a processing agent for elastic fibers that satisfies both of these. .
Therefore, an object of the present invention is to provide an adhesive for a hot-melt adhesive, a treatment agent for elastic fibers that is excellent in unwinding and smoothness, and an adhesiveness for the hot-melt adhesive, which is excellent in unwinding and smoothness. And to provide the fiber.

As a result of intensive studies, the inventors of the present invention have been able to solve the above problems with an elastic fiber treating agent containing a specific alcohol and at least one selected from mineral oil and ester oil, and containing the alcohol in a specific amount. I found that I can solve it.
That is, the present invention is a component (I) selected from higher alcohols, polyhydric alcohols having 3 to 6 valences, alkylene oxide adducts of higher alcohols, and alkylene oxide adducts of polyhydric alcohols having 3 to 6 valences. )When,
A treatment agent for elastic fibers, comprising at least one component (II) selected from mineral oil and ester oil, wherein the weight ratio of the component (I) in the treatment agent is more than 30% by weight and 90% by weight. The following is the treatment agent for elastic fibers, wherein the component (I) contains two or more higher alcohols having different carbon numbers and / or an alkylene oxide adduct of two or more higher alcohols having different carbon numbers .

The addition mole number of the alkylene oxide adduct of the higher alcohol and the alkylene oxide adduct of the polyhydric alcohol having 3 to 6 valences is 1 to 10, and the weight ratio of the component (I) in the treating agent is 40% by weight. It is preferably not less than 90% by weight.
It is preferable to further include at least one component (III) selected from silicone oil and metal soap.
The total weight ratio of the component (I), the component (II) and the component (III) is preferably more than 85% by weight based on the whole treating agent.
It is preferable that the component (III) contains silicone oil, and the weight ratio of the silicone oil in the entire treating agent is 0.01 to 70% by weight.
It is preferable that the component (III) contains a metal soap, and the weight ratio of the metal soap in the entire treating agent is 0.05 to 10% by weight.

  The elastic fiber of the present invention is obtained by applying the treatment agent for elastic fiber to the elastic fiber main body.

The method for producing an elastic fiber of the present invention includes a step of applying the above-mentioned treatment agent for elastic fiber to the elastic fiber body.
The elastic fiber production method of the present invention is at least one selected from higher alcohols, polyhydric alcohols having 3 to 6 valences, alkylene oxide adducts of higher alcohols, and alkylene oxide adducts of polyhydric alcohols having 3 to 6 valences. Step (A) of applying a treatment agent for elastic fibers containing a certain component (I) to the elastic fiber body, and treatment for elastic fibers containing at least one component (II) selected from mineral oil and ester oil And (B) applying the agent to the elastic fiber body.

  The treatment agent for elastic fibers of the present invention is excellent in adhesiveness with a hot melt adhesive, unwinding property and smoothness. The elastic fiber of the present invention is excellent in adhesiveness with a hot melt adhesive, unwinding property and smoothness.

The schematic diagram explaining the measuring method of unwinding speed ratio. The schematic diagram explaining the measuring method of knitting tension and static electricity.

  The treatment agent for elastic fibers of the present invention is characterized by containing a specific component (I) in a specific amount and at least one component (II) selected from mineral oil and ester oil. The details will be described below.

[Component (I)]
Component (I) is at least one selected from higher alcohols, polyhydric alcohols having 3 to 6 valences, alkylene oxide adducts of higher alcohols, and alkylene oxide adducts of polyhydric alcohols having 3 to 6 valences. It is an essential ingredient. The component (I) is a component that improves adhesiveness when used in combination with the component (II) described below.

  The higher alcohol is a linear and / or branched monohydric alcohol having 6 to 30 carbon atoms, and among them, the carbon number is more preferably 8 to 24, and 10 to 22 from the viewpoint of easily exhibiting the effect of the present application. More preferably, the carbon number is particularly preferably 12-18. Among them, a branched chain is preferable from the viewpoint of easily exerting the effect of the present application.

The higher alcohol is not particularly limited, for example, hexanol, heptanol, octanol, nonaol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, Straight chain alcohols such as eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacosanol; 2-ethylhexanol, 2-propylheptanol, 2-butyl Octanol, 1-methylheptadecanol, 2-hexyloctanol, 1-hexylheptanol, isodecanol, isotridecano , Branched alkanols such as 3,5,5-trimethylhexanol; hexenol, heptenol, octenol, nonenol, desenol, undecenol, dodecenol, tridecenol, tetradecenol, pentadecenol, hexadecenol, pentadecenol, hexadecenol, heptadecenol, octadecenol, nonadecenol, ecenol, ecenol, acenol, ecenol, ecenol, acenol, ecenole, acetanol, acenol, acenol, acenol, acenol, acenole, acetanol, acetanol, acetanol, adecenol, acetanol. Straight chain alkenols such as tetracocenol, pentacocenol, hexacocenol, heptacocenol, octacocenol, nonacocenol and triaconcenol; isohexenol, 2-ethylhexenol, isotridecenol, 1-methylheptadecenol, 1-hexylheptenol , Isotridecenol, and isooctadecenol Nord, and the like.
Specific examples of the higher alcohols are not particularly limited, but for example, higher alcohols derived from natural fats and oils such as palm alcohol and palm alcohol, Calcol (registered trademark) series (manufactured by Kao), Conol (registered trademark) series (new Nippon Rika), Oxocor (registered trademark) series (Kyowa Hakko Chemical), Neodol (registered trademark) series (Shell Chemical), ALFOL (registered trademark) series (Sasol), EXXAL (registered trademark) series (Exxon. Mobil) and the like.

  Examples of the trivalent to hexavalent polyhydric alcohol include glycerin, diglycerin, sorbitan, erythritol, pentaerythritol, trimethylolpropane, sorbitol, and ditrimethylolpropane, and among them, from the viewpoint of easily exerting the effect of the present invention, penta Erythritol is preferred.

The higher alcohol constituting the alkylene oxide adduct of the higher alcohol is the same as the higher alcohol described above.
Examples of the higher alcohol alkylene oxide adduct include the higher alcohol oxyethylene adduct, the higher alcohol oxypropylene adduct, the higher alcohol oxybutylene adduct, the higher alcohol oxyethylene, oxypropylene and oxybutylene. Random and / or block adducts, but from the viewpoint that the effect of the present invention is easily exhibited by improving the compatibility of the elastic fiber treatment agent, the higher alcohol oxypropylene adduct, the higher alcohol oxyethylene and Random adducts of oxypropylene are preferred.

  The number of moles of the oxyethylene adduct of the higher alcohol added is preferably 1 to 20, more preferably 1 to 15, and further preferably 1 to 10 from the viewpoint of easily exhibiting the effect of the present invention. The number of moles of the oxypropylene adduct of the higher alcohol added is preferably 1 to 20, more preferably 1 to 15, and even more preferably 1 to 10 from the viewpoint of easily exhibiting the effect of the present invention. The number of moles of the oxybutylene adduct of the higher alcohol added is preferably 1 to 20, more preferably 1 to 15, and even more preferably 1 to 10 from the viewpoint that the effect of the present invention is easily exhibited. The number of added moles of the random alcohol and / or block adduct of oxyethylene, oxypropylene, and oxybutylene of the higher alcohol is preferably 1 to 20, more preferably 1 to 15, and further preferably 1 to 10.

  The polyhydric alcohol that constitutes the alkylene oxide adduct of the trivalent to hexavalent polyhydric alcohol is the same as the above-mentioned polyhydric alcohol.

  The number of moles of the oxyethylene adduct of the polyhydric alcohol having 3 to 6 valences is preferably 1 to 20, more preferably 1 to 15, and further preferably 1 to 10 from the viewpoint of easily exhibiting the effect of the present invention. The number of moles of the oxypropylene adduct of the higher alcohol added is preferably 1 to 20, more preferably 1 to 15, and even more preferably 1 to 10 from the viewpoint of easily exhibiting the effect of the present invention. The number of moles of the oxybutylene adduct of the higher alcohol added is preferably 1 to 20, more preferably 1 to 15, and even more preferably 1 to 10 from the viewpoint that the effect of the present invention is easily exhibited. The number of added moles of the random alcohol and / or block adduct of oxyethylene, oxypropylene, and oxybutylene of the higher alcohol is preferably 1 to 20, more preferably 1 to 15, and further preferably 1 to 10.

It is preferable that the component (I) contains two or more higher alcohols having different carbon numbers and / or an alkylene oxide adduct of two or more higher alcohols having different carbon numbers, since the hot melt adhesiveness is improved.
It is not clear that the inclusion of an alkylene oxide adduct of two or more higher alcohols having different carbon numbers and / or two or more higher alcohols having different carbon numbers improves hot melt adhesion, but alkyl of higher alcohols It is presumed that the fact that the groups have different carbon numbers improves the compatibility between the fiber treatment agent and the hot melt adhesive, and that the hot melt adhesive uniformly forms a film on the elastic fiber.

[Component (II)]
The component (II) is at least one selected from mineral oils and ester oils, and is an essential component for the present invention. The component (II) is a component which, when used in combination with the above component (I), further improves the hot melt adhesive performance of the component (I) and has a low fiber / metal friction and excellent process passability.
Although the reason for further improving the hot melt adhesive performance of the component (I) by using the component (I) together is not clear, since the mineral oil and the ester oil are non-polar components, the alkyl of the component (I) is used. It is presumed that the group is compatible with the component (II), and the alkyl group of the component (II) facilitates the interaction with the alkyl group of the hot melt adhesive.

  The mineral oil is not particularly limited, but may be machine oil, spindle oil, liquid paraffin, etc., and one or more kinds may be used. The viscosity of the mineral oil with a Redwood viscometer at 30 ° C. is preferably 30 seconds to 350 seconds, more preferably 35 seconds to 200 seconds, and even more preferably 40 seconds to 150 seconds. As the mineral oil, liquid paraffin is preferable because of its low odor generation. If the viscosity of the mineral oil is less than 30 seconds, the quality of the elastic fiber obtained may deteriorate. On the other hand, if the viscosity of the mineral oil exceeds 350 seconds, the solubility of other components blended in the treating agent may deteriorate.

  The ester oil is not particularly limited as long as it is an ester of a monohydric alcohol and a monocarboxylic acid, an ester of a monohydric alcohol and a polycarboxylic acid, or an ester of a polyhydric alcohol and a monocarboxylic acid. You may use 1 type (s) or 2 or more types. As the monohydric alcohol, monohydric aliphatic alcohols, aromatic alcohols, alicyclic alcohols, phenols and the like described later can be used. Among these, monohydric aliphatic alcohols and aromatic alcohols are preferable.

The monohydric aliphatic alcohol is not particularly limited, but for example, octanol, 2-ethylhexanol, 1-nonanol, 1-decanol, undecyl alcohol, lauryl alcohol, tridecyl alcohol, isotridecyl alcohol, myristyl alcohol. , Pentadecyl alcohol, 1-hexadecanol, palmitolyl alcohol, 1-heptadecanol, stearyl alcohol, oleyl alcohol, isostearyl alcohol, nonadecyl alcohol, 1-eicosanol, behenyl alcohol, 1-tetracosanol, erucyl alcohol , Lignoceryl alcohol and the like. When the monohydric aliphatic alcohol has a branch, the number of branches, the length of the branched chain, and the position of the branch are not particularly limited.
Examples of aromatic alcohols include phenol and benzyl alcohol.
Examples of the alicyclic alcohol include cyclooctanol, cyclododecanol, cyclohexanol, cycloheptanol, cyclopentanol, menthol and the like.

  The polyhydric alcohol is not particularly limited, but for example, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,5-Pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 2-methyl-1,8-octanediol, cyclohexanediol, glycerin, diglycerin , Triglycerin, tetraglycerin, sorbitol, trimethylolpropane, pentaerythritol and the like.

  As the monovalent carboxylic acid, a monovalent aliphatic carboxylic acid, aromatic carboxylic acid, hydroxycarboxylic acid, etc., which will be described later, can be used as well. Among these, monovalent aliphatic carboxylic acids and aromatic carboxylic acids are preferable.

  The monovalent carboxylic acid is not particularly limited, and examples thereof include valeric acid, caproic acid, enanthic acid, caprylic acid, 2-ethylhexylic acid, capric acid, lauric acid, myristic acid, pentadecyl acid, palmitic acid, and palmitoleic acid. , Margaric acid, stearic acid, oleic acid, isostearic acid, vaccenic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, cetonic acid, benzoic acid and the like.

  The polycarboxylic acid is not particularly limited, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, phthalic acid, trimellitic acid, pyromellitic acid, citric acid, isocitric acid, etc. Is mentioned.

  Specific examples of the ester oil are not particularly limited, for example, heptyl valerate, heptyl caproate, octyl caproate, cetyl caprylate, isooctyl laurate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, stearin. Butylate, octyl stearate, oleyl laurate, isotridecyl stearate, octyl stearate, isooctyl stearate, tridecyl stearate, isobutyl stearate, methyl oleate, isobutyl oleate, heptyl oleate, oleyl oleate, polyethylene dilaurate Glycol, Polyethylene glycol dimyristate, Polyethylene glycol dioleate, Polyethylene glycol distearate, Polypropylene dilaurate Ren glycol, polypropylene glycol dimyristate, polypropylene glycol dioleate, polypropylene glycol distearate, dicetyl oxalate, diisooctyl malonate, dilauryl succinate, diisodecyl adipate, isononyl adipate, dioctyl adipate, diisooctyl fumarate, diisooctyl phthalate. , Dioctyl phthalate, dinonyl phthalate, diisodecyl phthalate, diundecyl phthalate, triisooctyl trimellitate, triisobutyl trimellitate, triisodecyl trimellitate, triisostearyl trimellitate, glycerin triisooctyl, glycerin trilauryl , Glycerin trimyristyl, glycerin trioleyl, glycerin tristearyl, sorbitan monora Rate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquioleate, sorbitan trilaurate, sorbitan tristearate, include sorbitan tanto tripalmitate like.

[Component (III)]
The component (III) is at least one selected from silicone oils and metal soaps, and when the elastic fiber treating agent further contains the component (III), the smoothness and unwinding property are very excellent.

The silicone oil is not particularly limited, but is dimethyl silicone oil, methylphenyl silicone oil, methylalkyl silicone oil, methylhydrogen silicone oil, alkyl modified silicone, ester modified silicone, polyether modified silicone, amino modified silicone, amide. Modified silicone, imide modified silicone, carbinol modified silicone, epoxy modified silicone, carboxy modified silicone, carboxamide modified silicone, mercapto modified silicone, methacryl modified silicone, phenol modified silicone, fluorine modified silicone, and modified siloxane units of the above modified silicone. Modified silicones (for example, amino / polyether modified silicones) produced by using two or more types in combination You can gel may be used alone or in combination. It may also contain unreacted silanol groups derived from raw materials, unreacted halogen groups, polymerization catalysts, cyclic siloxanes, and the like. Viscosity at 25 ° C. of the silicone oil is preferably 2~10000mm ² / s, more preferably from 5 to 5000 mm ² / s, more preferably 5~1000mm ² / s. If the viscosity is less than 2 mm ² / s, the silicone oil may volatilize, and if it exceeds 10,000 mm ² / s, the solubility of other components blended in the treatment agent may deteriorate.
The average amount of siloxane bonds (SiOR ^a R ^b : R ^a and R ^b each independently represents an organic group) in the silicone oil is preferably 3 to 900, more preferably 5 to 500, and 7 to 200. Is more preferable. The organic group of R ^a and R ^b is a hydrocarbon group having 1 to 24 carbon atoms, and is a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, an isopentyl group, a hexyl group, a cyclo group. Examples thereof include a propyl group, a cyclohexyl group, a phenyl group and a benzyl group, with a methyl group and a phenyl group being particularly preferable.

  A modified silicone generally means a reactive (functional) group or a non-reactive (functional) group at at least one of both ends, one end, a side chain, and both side chain ends of a polysiloxane such as dimethyl silicone (polydimethylsiloxane). It has a structure in which at least one functional group is bonded.

  As the modified silicone, more specifically, an alkyl-modified silicone such as a modified silicone having a long-chain alkyl group (such as an alkyl group having 6 or more carbon atoms or a 2-phenylpropyl group); an ester that is a modified silicone having an ester bond Modified silicone; polyether modified silicone, which is a modified silicone having a polyoxyalkylene group (for example, polyoxyethylene group, polyoxypropylene group, polyoxyethyleneoxypropylene group, etc.); aminopropyl group and N- (2-amino) Amino-modified silicone, which is a modified silicone having an ethyl) aminopropyl group, an amide-modified silicone which is a modified silicone having an amide bond, an imide-modified silicone which is a modified silicone having an imide bond, and a modified silicone having an alcoholic hydroxyl group. Carbinol modified silicone which is corn; epoxy modified silicone which is modified silicone having epoxy group such as glycidyl group or alicyclic epoxy group; carboxy modified silicone which is modified silicone having carboxyl group; modified silicone which has carboxamide group A certain carboxamide-modified silicone; a mercapto-modified silicone that is a modified silicone having a mercapto group; a methacryl-modified silicone that has a methacrylic group; a phenol-modified silicone that has a phenol group; a fluorine-modified silicone that has a fluorine group; Examples thereof include modified silicones produced by using two or more modified siloxane units in combination; (for example, amino-polyether modified silicones).

  Examples of the metal soap include monovalent, divalent or trivalent metal salts of fatty acids having 8 to 22 carbon atoms. Examples of the metal soap include calcium laurate, calcium palmitate, barium myristate, magnesium myristate, magnesium palmitate, magnesium laurate, magnesium stearate, magnesium 2-ethylhexylate, zinc behenate, aluminum tribehenate, calcium stearate. , 2-ethylhexylate, aluminum stearate, aluminum palmitate, barium stearate, zinc caprate, zinc stearate and the like. These metal soaps may use 1 type (s) or 2 or more types.

  The average particle diameter of the metal soap is not particularly limited, but is preferably 0.01 to 5 μm, more preferably 0.02 to 3 μm, and particularly preferably 0.05 to 2 μm. If the average particle size of the metal soap is less than 0.01 μm, the effect of addition may not be seen in some cases. On the other hand, when the average particle diameter of the metal soap is more than 5 μm, the metal soap is likely to fall off the fiber surface, which may cause scum in the process after spinning.

  The shape of the metal soap is not particularly limited, but is preferably needle-like or scale-like. When the shape of the metal soap is needle-like, the ratio of the longitudinal direction to the lateral direction is preferably 10: 1 to 2: 1 and more preferably 8: 1 to 3: 1 from the viewpoint of unwinding property.

(Other ingredients)
The treatment agent for elastic fibers of the present invention is, from the viewpoint of improving smoothness and unwinding performance, in addition to the components described above, an organopolysiloxane resin, a nonionic surfactant, a cationic surfactant, and an anionic surfactant. The agent may further contain at least one other component selected from polyalphaolefins. As the other component, one kind or two or more kinds may be used.

  The above-mentioned organopolysiloxane resin (hereinafter simply referred to as silicone resin) means a silicone having a three-dimensional crosslinked structure. The silicone resin is generally at least one kind of constituent selected from a monofunctional constituent unit (M), a difunctional constituent unit (D), a trifunctional constituent unit (T) and a tetrafunctional constituent unit (Q). It consists of units.

  The silicone resin is not particularly limited, but examples thereof include silicone resins such as MQ silicone resin, MQT silicone resin, T silicone resin, and DT silicone resin.

Examples of the MQ silicone resin include R ^c R ^d R ^e SiO _1/2 (provided that R ^c, R ^d and R ^e are all hydrocarbon groups) and 4 which are monofunctional constitutional units. Examples thereof include a silicone resin containing SiO _4/2 which is a functional constitutional unit.

Examples of the MQT silicone resin include R ^c R ^d R ^e SiO _1/2 (provided that R ^c , R ^d and R ^e are all hydrocarbon groups) and 4 which are monofunctional constitutional units. Examples thereof include a silicone resin containing SiO _{4/2 which} is a functional constitutional unit and R ^f SiO _3/2 which is a trifunctional constitutional unit (where R ^f is a hydrocarbon group).

Examples of the T silicone resin include a silicone resin containing R ^f SiO _3/2 (where R ^f is a hydrocarbon group) which is a trifunctional constitutional unit (a terminal of which is a hydrocarbon group and silanol). It may be a group or an alkoxy group.) And the like.

Examples of the DT silicone resin include a bifunctional structural unit R ^g R ^h SiO _2/2 (provided that R ^g and R ^h are both hydrocarbon groups) and a trifunctional structural unit. R ^f SiO _3/2 (wherein R ^f is a hydrocarbon group) and the like can be mentioned.

The hydrocarbon group of R ^{c to} R ^{h is} a hydrocarbon group having 1 to 24 carbon atoms, and is a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, an isopentyl group, a hexyl group. , A cyclopropyl group, a cyclohexyl group, a phenyl group, a benzyl group and the like can be mentioned, and a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group and a phenyl group are particularly preferable.

  The nonionic surfactant is not particularly limited, for example, sorbitan fatty acid ester, oxyalkylene adduct of sorbitan fatty acid ester (oxyalkylene is 1 to 20 mol, oxyalkylene is oxyethylene and / or oxypropylene, random And / or a block), an alkylphenol having an alkyl group having 6 to 22 carbon atoms, an oxyalkylene adduct of an alkylphenol having an alkyl group having 6 to 22 carbon atoms (oxyalkylene is 1 to 20 mol, oxyalkylene is oxyethylene). And / or oxypropylene, which are random and / or block.), Fatty acid polyoxyalkylene glycol ester (1 to 20 mol of oxyalkylene, oxyalkylene is oxyethylene and / or oxypropene). A lens, a random and or block.) And the like. These nonionic surfactants may be used alone or in combination of two or more.

  The cationic surfactant is not particularly limited, but examples thereof include alkylamines such as primary amines, secondary amines and tertiary amines or salts thereof, and quaternary ammonium salts. Specifically, laurylamine, myristylamine, cetylamine, stearylamine, oleylamine, diethylamine, dioctylamine, distearylamine, methylstearylamine, polyoxypropylene-added laurylamine, polyoxyethylene-added laurylamine, polyoxyethylene-added stearyl. Amine, polyoxyethylene-added oleylamine, monoethanolamine, diethylethanolamine, dibutylethanolamine, triethanolamine, laurylethanolamine, oleylpropylenediamine, trioctylamine, dimethyllaurylamine, dimethylmyristylamine, dimethylstearylamine, didecyl Dimethylammonium salt, decyltrimethylammonium salt, dioctyldimethylammonium Salt, octyl trimethyl ammonium salts and the like. These cationic surfactants may be used alone or in combination of two or more.

  The anionic surfactant is not particularly limited, but includes, for example, alkanesulfonic acid and / or its salt, dialkylsulfosuccinic acid and / or its salt, alkylbenzenesulfonic acid and / or its salt, alkylnaphthalenesulfonic acid and / or its salt. Salt, alkyl sulfuric acid and / or salt thereof, polyoxyethylene alkyl ether sulfuric acid and / or salt thereof, polyoxyethylene alkyl ether acetic acid and / or salt thereof, alkyl phosphoric acid, polyoxyethylene alkyl ether phosphoric acid, or components thereof There is salt, etc. Specifically, an alkanesulfonic acid having an alkyl group having 6 to 22 carbon atoms and / or a salt thereof, a dialkylsulfosuccinic acid ester described below and / or a salt thereof, an alkylbenzenesulfonic acid having an alkyl group having 6 to 22 carbon atoms, and / Or salt thereof, alkyl sulfuric acid having an alkyl group having 1 to 20 carbon atoms and / or salt thereof, polyoxyethylene alkyl ether sulfuric acid having an alkyl group having 6 to 22 carbon atoms and / or salt thereof, having 6 to 22 carbon atoms A polyoxyethylene alkyl ether acetic acid having an alkyl group and / or a salt thereof, an alkyl phosphoric acid having an alkyl group having 6 to 22 carbon atoms, an alkali metal salt of an alkyl phosphoric acid having an alkyl group having 6 to 22 carbon atoms, and / or Alternatively, an alkaline earth metal salt or a polyoxyene having an alkyl group having 6 to 22 carbon atoms Examples thereof include alkylene alkyl ether phosphoric acid, an alkali metal salt and / or an alkaline earth metal salt of polyoxyethylene alkyl ether phosphoric acid having an alkyl group having 6 to 22 carbon atoms, and among them, a dialkylsulfosuccinic acid ester salt is used. preferable. These anionic surfactants may be used alone or in combination of two or more.

[Treatment agent for elastic fiber]
Viscosity at 30 ° C. of the elastic fiber-processing agent of the present invention is preferably 5 to 200 mm ² / s, more preferably 5 to 100 mm ² / s, more preferably 6~60mm ² / s. If the viscosity is too low, the processing agent may volatilize or scatter in the form of mist when the elastic fiber is run in the spinning and post-processing steps, which may result in contamination of the surrounding area or inhalation by workers. Further, if the viscosity is too high, when the elastic fiber is run in the spinning and post-processing steps, the thread may wind around the running roller due to the adhesiveness, which may cause thread breakage.

  The method for producing the treatment agent for elastic fiber of the present invention is not particularly limited, and a known method can be adopted. For example, a method of preliminarily blending some components and mixing with other components, or a method of mixing all components at once may be used. When the treatment agent for elastic fibers of the present invention contains a metal soap, it may be produced by mixing already crushed metal soap with a base component or the like. It may be produced by pulverizing with a wet pulverizer to obtain a predetermined average particle size.

The lower limit of the weight ratio of the component (I) in the elastic fiber treating agent is 21% by weight, preferably 22% by weight, more preferably 25% by weight, further preferably more than 30% by weight, and 35% by weight. Particularly preferred. If it is less than 21% by weight, the hot melt adhesiveness is poor.
The upper limit of the weight ratio of the component (I) in the elastic fiber treating agent is 90% by weight, preferably 85% by weight, more preferably 80% by weight, further preferably 70% by weight, particularly preferably 60% by weight. preferable. If it exceeds 90% by weight, the smoothness is poor.

The lower limit of the weight ratio of the component (II) in the elastic fiber treating agent is preferably 5% by weight, more preferably 8% by weight, further preferably 10% by weight, particularly preferably more than 20% by weight, and 30% by weight. Is most preferred. If it is less than 5% by weight, the smoothness may be poor.
The upper limit of the weight ratio of the component (II) in the elastic fiber treating agent is preferably 89% by weight, more preferably 85% by weight, further preferably 80% by weight, particularly preferably 70% by weight, and 60% by weight. Most preferred. If it exceeds 89% by weight, the hot melt adhesiveness may decrease.

  When the treatment agent for elastic fibers of the present invention contains the component (III), the total weight ratio of the component (I), the component (II) and the component (III) is improved from the viewpoint of improving hot melt adhesiveness. The lower limit value of is preferably more than 85% by weight, more preferably 90% by weight, and further preferably 95% by weight, based on the whole treating agent. The upper limit is 100% by weight, preferably 99% by weight, more preferably 98% by weight.

When the treatment agent for elastic fibers of the present invention contains the component (III) and the component (III) contains a silicone oil, the silicone oil occupies the entire treatment agent from the viewpoint of improving smoothness and unwinding property. The lower limit of the weight ratio is preferably 0.01% by weight, more preferably 0.05% by weight, further preferably 0.1% by weight, particularly preferably 0.2% by weight. If it is less than 0.01% by weight, smoothness and unwinding may not be improved.
The upper limit of the weight ratio of the silicone oil in the entire treating agent is preferably 70% by weight, more preferably 60% by weight, further preferably 50% by weight, and particularly preferably 40% by weight. If it exceeds 70% by weight, the hot melt adhesiveness may be deteriorated even when used in combination with the component (I).

  In the treatment agent for elastic fiber of the present invention, it is preferable that the weight ratio of the dihydric alcohol such as ethylene glycol, propylene glycol or diethylene glycol is small, because both hot melt adhesiveness and smoothness can be achieved. Specifically, in the treatment agent for elastic fiber of the present invention, when the weight ratio of the dihydric alcohol in the treatment agent is less than 15% by weight, both hot melt adhesiveness and smoothness can be achieved, which is preferable. . When the dihydric alcohol is contained in an amount of 15% by weight or more, it is necessary to increase the content of the component (I) in order to improve the hot melt adhesiveness, and even when it is used in combination with the component (II), the smoothness is improved. You may not be able to

[Elastic fiber]
The elastic fiber of the present invention is obtained by adding the treatment agent for elastic fiber of the present invention to the elastic fiber body. The adhesion ratio of the elastic fiber treating agent to the entire elastic fibers is not particularly limited, but is preferably 0.1 to 15% by weight, and more preferably 0.5 to 10% by weight. The method for applying the treatment agent for elastic fiber of the present invention to the elastic fiber body is not particularly limited, and a known method can be adopted.

  The elastic fiber (elastic fiber body) of the present invention is a fiber having elasticity using a polyether polyurethane, a polyester polyurethane, a polyether ester elastomer, a polyester elastomer, a polyethylene elastomer, a polyamide elastomer, etc., and its elongation is usually It is 300% or more.

  The elastic fiber of the present invention comprises a polyurethane or polyurethane urea which is obtained by reacting PTMG or polyester diol with an organic diisocyanate and then chain-extending with 1,4 butane diol, ethylene diamine, propylene diamine or pentane diamine. Can be mentioned. For example, polyurethane urea elastic fiber is prepared by preparing polytetramethylene glycol (PTMG) having a molecular weight of 1000 to 3000 and diphenylmethane diisocyanate (MDI), and dimethyl PTMG / MDI = 1/2 to 1 / 1.5 (molar ratio). A 20-40% solution of a polyurethaneurea polymer obtained by reacting in a solvent such as acetamide or dimethylformamide and extending the chain with a diamine such as ethylenediamine or propanediamine is subjected to dry spinning at a spinning speed of 400 to 1200 m / min. It can be manufactured. The adaptive fineness of the elastic fiber body is not particularly limited.

  The elastic fiber body of the present invention may contain an inorganic substance such as titanium oxide, magnesium oxide, hydrotalcite and zinc oxide, or an organic compound such as metal soap. Examples of the metal soap include calcium 2-ethylhexylate, calcium stearate, calcium palmitate, magnesium stearate, magnesium palmitate, magnesium laurate, barium stearate, zinc caprate, zinc behenate, zinc stearate and the like. You may use 1 type (s) or 2 or more types as an inorganic substance or an organic compound.

  As the application of the elastic fiber of the present invention, a processed yarn such as a covering yarn such as CSY, single covering, PLY, and air covering, circular knitting, tricot, or the like can be used as a fabric. Further, by using these processed yarns and cloths, stretchable products are provided for comfort to products such as stockings, socks, underwear, and swimwear that require stretchability, and outerwear such as jeans and suits. Also used for purposes. The elastic fiber of the present invention is particularly suitable for use in a disposable diaper from the viewpoint of requiring adhesiveness.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to the Examples described herein. In addition, "percentage (%)" and "part" shown in the following examples show "weight%" and "part by weight" unless otherwise specified. In the examples and comparative examples, the evaluation of each characteristic of the treatment agent for elastic fiber was performed according to the following methods.

[Hot melt adhesiveness]
A hot melt adhesive was adhered to a polypropylene non-woven fabric at a rate of 40 g / m ² , and ten elastic fibers of 940 dtex that were doubled were pressed at room temperature. The pressure-bonded body was cut into a length of 300 mm, and the length of the elastic fiber after standing for 12 hours in an atmosphere of 37 ° C. was measured. When the hot-melt adhesive property is good, the shrinkage is small. When the shrinkage is not at all, the retention is 100% at 300 mm, and when the shrinkage is complete, the retention is 0% at 150 mm. The hot melt adhesiveness was evaluated based on the average retention rate of 10 pieces.
According to the following criteria, ◎ and ○ were accepted.
⊚: Very excellent retention rate of 90% or more,
◯: Excellent retention rate of 80% or more and less than 90% Δ: Slightly inferior retention rate of 60% or more and less than 80% X: Inferior retention rate of less than 60%

[Unwinding evaluation method]
In FIG. 1, cheese (1) made of fibers to which a treating agent has been applied is set on the unwinding side of the unwinding speed ratio measuring machine, and a paper tube (2) is set on the winding side. After setting the winding speed to a constant speed, the rollers (3) and (4) are simultaneously activated. In this state, since the thread (5) is hardly applied with tension, the thread sticks on the cheese and does not separate, so the unwinding point (6) is in the state shown by the dotted line in FIG. By changing the unwinding speed, the unwinding point (6) of the thread (5) from the cheese changes, so the unwinding speed is set so that this point coincides with the contact point (7) between the cheese and the roller. The unwinding speed ratio is obtained by (Equation 1). The smaller this value is, the better the unwinding property is.
In addition, ⊚ and ◯ were passed in the following evaluation criteria.
⊚: Unwinding speed ratio is less than 40% (very good)
◯: Unwinding speed ratio is 40% or more and less than 85% (good)
Δ: Unwinding speed ratio is 85% or more and less than 100% (somewhat poor)
X: Unwinding speed ratio is 100% or more (defective)
Unwinding speed ratio (%) = (winding speed-unwinding speed) / unwinding speed x 100 (Equation 1)

[Smoothness evaluation method]
As a substitute for the smoothness evaluation, a knitting tension measuring method for measuring the friction between the fiber and the metal was used. In FIG. 2, the elastic yarn (9) vertically taken from the cheese (8) is attached to the U gauge (13) via the compensator (10), the roller (11) and the knitting needle (12), and the roller (14). ) And was wound around a winding roller (16) of a speedometer (15), and the knitting tension at that time was measured with a U gauge (13) to measure the friction (g) between the fiber and the knitting needle. The measurement was performed at a winding speed of 100 m / min. The smaller the value, the better the smoothness.
In addition, ⊚ and ◯ were passed in the following evaluation criteria.
A: Less than 100 g (very good)
◯: 100 g or more and less than 120 g (good)
Δ: 120 g or more and less than 130 g (somewhat defective)
×: 130 g or more (defective)

[Antistatic evaluation method]
As a substitute evaluation for antistatic property evaluation, a static electricity generation amount measuring method was used. In FIG. 2, the Kasuga type static electricity measuring device is set at the position (17), and the amount of static electricity generated under the conditions of 20 ° C. and 60% RH is measured while winding at 100 m / min.
In the following evaluation criteria, ◯ or above was regarded as acceptable.
⊚: Less than 4 kV (very good)
◯: 4 kV or more and less than 10 kV (good)
Δ: 10 kV or more and less than 15 kV (somewhat defective)
×: 15 kV or more (defective)

(Examples 1-29, Comparative Examples 1-8)
Polytetramethylene ether glycol having an average molecular weight of 1600 was reacted with 4,4′-diphenylmethane diisocyanate at a molar ratio of 1: 2, and then chain-extended using a dimethylformamide solution of 1,2-diaminopropane to prepare a polymer as a spinning solution. A dimethylformamide solution having a concentration of 33% was obtained. The concentration of the spinning dope was 1900 mPa · S (measurement temperature: 30 ° C). However, Examples 1, 3, 6, 7, 13, 16, 18, 25, 26, 28, and 29 are Reference Examples 1, 3, 6, 7, 13, 16, 18, 25, 26, 28, respectively. And 29.

What does not contain metal soap (calcium laurate, magnesium stearate), after mixing the components shown in Tables 1 to 3 and stirring for 30 minutes at 20 to 40 ° C., metal soap (calcium laurate, magnesium stearate). The mixture containing and stirred was pulverized with a wet pulverizer described above using the wet pulverizer to obtain the treatment agents for elastic fibers of Examples 1 to 29 and Comparative Examples 1 to 8, respectively. The components used in Examples and Comparative Examples are shown in Tables 1 to 3.
All amino-modified silicones in the table are side-chain modified, amine value 25 KOHmg / g, 500 mm ² / s (25 ° C), and polyether-modified silicones are all side-chain PO / EO modified. , 200 mm ² / s (25 ° C.) was used.

The obtained spinning dope was discharged from a spinneret having four pores into a N ₂ stream at 195 ° C. for dry spinning. The treatment agent for elastic fibers was applied to each of the running yarns (elastic fiber main body) being spun by an oiling roller in an amount of 1% by weight. Therefore, 0.99% by weight of the elastic fiber treating agent was applied to the entire elastic fiber. Then, the elastic fibers treated with the elastic fiber treating agent were wound on bobbins at a speed of 500 m / min to obtain 940 dtex multifilament cheese (amount of winding 3 kg). Each of the obtained cheeses was evaluated by the above evaluation method. The results are shown in Tables 1 to 4.

As can be seen from Tables 1 to 3, in Examples 1 to 29, from higher alcohols, polyhydric alcohols having 3 to 6 valences, alkylene oxide adducts of higher alcohols and alkylene oxide addition products of polyhydric alcohols having 3 to 6 valences. A treatment agent for elastic fibers comprising at least one component (I) selected and at least one component (II) selected from mineral oil and ester oil, wherein the component ( Since the treatment agent for elastic fiber having a weight ratio of I) of 21% by weight or more and 90% by weight or less is used, the problem of the present application that is excellent in hot melt adhesiveness, unwinding property and smoothness can be solved. In particular, in the case of further containing the component (III) in addition to the component (I) and the component (II) (Examples 4, 6, 9, 10, 15, 20, 22 to 24), the hot-melt adhesive property and the solution In addition to the flexibility and smoothness, the antistatic property is extremely excellent, and it is possible to achieve both hot melt adhesiveness and process passability.
On the other hand, as can be seen from Table 4, in Comparative Examples 1 to 8, when the component (I) was contained but the weight ratio was less than 21 weight (Comparative Examples 1, 2, 6 and 7), the component (I) was selected. If not included (Comparative Examples 3 to 5 and 8), any of the problems of the present application cannot be solved.

  INDUSTRIAL APPLICABILITY The treatment agent for elastic fiber of the present invention is excellent in adhesiveness with a hot-melt adhesive, unwinding property and smoothness, and thus is suitably applied to the production process of elastic fiber.

1 Cheese of elastic fiber 2 Rolling paper tube 3 Roller 4 Roller 5 Traveling yarn 6 Unwinding point 7 Contact point of cheese and roller 8 Cheese of elastic fiber 9 Thread 10 Compensator 11 Roller 12 Knitting needle 13 U gauge 14 Roller 15 Speedometer 16 Winding roller 17 Kasuga potential measuring device

Claims (8)

Component (I), which is at least one selected from higher alcohols, polyhydric alcohols having 3 to 6 valences, alkylene oxide adducts of higher alcohols, and alkylene oxide adducts of polyhydric alcohols having 3 to 6 valences;
Component (II), which is at least one selected from mineral oil and ester oil,
A treatment agent for an elastic fiber containing: wherein the weight ratio of the component (I) in the treatment agent is more than 30% by weight and 90% by weight or less, and the component (I) is two or more kinds having different carbon numbers. A treatment agent for elastic fibers , comprising a higher alcohol and / or an alkylene oxide adduct of two or more higher alcohols having different carbon numbers .   The addition mole number of the alkylene oxide adduct of the higher alcohol and the alkylene oxide adduct of the polyhydric alcohol having 3 to 6 valences is 1 to 10, and the weight ratio of the component (I) in the treating agent is 40% by weight. The treatment agent for elastic fibers according to claim 1, which is not less than 90% by weight.   The treatment agent for elastic fiber according to claim 1 or 2, further comprising at least one component (III) selected from silicone oil and metal soap.   The treatment agent for elastic fibers according to claim 3, wherein the total weight ratio of the component (I), the component (II) and the component (III) is more than 85% by weight based on the whole treatment agent.   The treatment agent for elastic fibers according to any one of claims 1 to 4, wherein the component (III) contains a silicone oil, and the weight ratio of the silicone oil in the entire treatment agent is 0.01 to 70% by weight.   The treatment agent for elastic fibers according to any one of claims 1 to 4, wherein the component (III) contains metal soap, and the weight ratio of the metal soap in the entire treatment agent is 0.05 to 10% by weight.   An elastic fiber obtained by applying the treatment agent for elastic fiber according to claim 1 to an elastic fiber body. A method for producing an elastic fiber, comprising a step of applying the treatment agent for elastic fiber according to claim 1 to an elastic fiber body .

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