JP6351322B2 - Elastic fiber treatment agent and elastic fiber - Google Patents

Description

  The present invention relates to a treatment agent for elastic fibers and use thereof.

The elastic fiber is a fiber that is easily stuck because it has viscoelasticity. In particular, in a stringed body (hereinafter sometimes referred to as cheese), the sticking proceeds with time due to the pressure applied during winding. Therefore, when using an elastic fiber thread body, unwinding is poor and thread breakage is caused. In order to improve this unwinding failure, treatment agents for elastic fibers containing various unwinding agents have been developed.
For example, Patent Document 1 describes a silicone resin (MQ resin) as a peptizer, and Patent Document 2 describes a metal soap.
However, even when silicone resin (MQ resin) or metal soap is used, the unraveling property is not sufficient.

Japanese Patent Laid-Open No. 09-078460 JP 2009-041121 A

  An object of the present invention is to provide a treatment agent for elastic fibers excellent in unwinding property and an elastic fiber excellent in unwinding property.

As a result of intensive studies, the present inventors have found that the above-mentioned problems can be solved if the elastic fiber treatment agent essentially contains an inorganic layered compound.
That is, the present invention is an inorganic layered compound be an elastic fiber-processing agent you containing mandatory, further contains a lubricating agent is at least one selected from silicone oils, mineral oils and ester oils, the inorganic layered The compound contains a layered double hydroxide, and the weight ratio of the smoothing agent in the entire treating agent for elastic fibers is 40 to 99.9% by weight .
It is preferable that the layered double hydroxide contains at least one selected from hydrotalcite, massenite, and mixnerite.
The average particle size of the inorganic layered compound is preferably 0.001 μm to 500 μm.
The weight ratio of the inorganic layered compound in the entire treatment agent is preferably 0.001 to 30% by weight.
The elastic fiber of the present invention is one in which the elastic fiber treatment agent is applied to the elastic fiber body.

  Since the treatment agent for elastic fibers of the present invention is excellent in unwinding property, the elastic fiber provided with the elastic fiber treatment agent is excellent in unwinding property.

The schematic diagram explaining the measuring method of unwinding speed ratio. The schematic diagram explaining the measuring method of knitting tension | tensile_strength and static electricity. The schematic diagram explaining the measuring method of the friction coefficient between fibers.

  The processing agent for elastic fibers of the present invention essentially contains an inorganic layered compound. Hereinafter, each component of the processing agent for elastic fibers will be described.

[Inorganic layered compound]
The inorganic layered compound is an essential component for the treatment agent for elastic fibers of the present invention.
The inorganic layered compound is a component that can prevent fiber-fiber sticking even under high contact pressure. The reason why the inorganic layered compound is excellent in improving the unraveling property is that the inorganic layered compound is easy to cleave, so that it can be cleaved under high contact pressure and cover the fiber surface without unevenness, contributing to the unraveling property. It is possible that
In the spinning process and the knitting process, friction occurs between the fibers and the rollers, guides, knitting needles, and the like. Although there is concern about mechanical wear of rollers, guides, knitting needles, etc., inorganic layered compounds are easy to cleave, and are excellent in terms of preventing fiber damage and mechanical wear.
Furthermore, the inorganic layered compound is excellent in antistatic properties. The reason why the inorganic layered compound is excellent in antistatic property is considered to be because it is highly hydrophilic and easily retains moisture on the fiber surface.

  The inorganic layered compound is a compound in which unit crystal layers are stacked to form a layered structure. A layered structure is a structure in which atoms that are strongly bonded by a covalent bond or the like and densely arranged are stacked almost in parallel by a weak binding force such as van der Waals.

  The inorganic layered compound is preferably a layered silicate and / or a layered double hydroxide from the viewpoint of excellent antistatic properties due to high hydrophilicity.

  The layered silicate is generally (i) a type having a two-layer structure having an octahedral layer with aluminum, magnesium, etc. as a central metal above the silica tetrahedral layer, and (ii) a silica tetrahedral layer. However, it is classified into a type having a three-layer structure in which an octahedral layer having aluminum or magnesium as a central metal is narrowed from both sides.

Although it does not specifically limit as a specific example of the layered silicate of the above-mentioned (i) two-layer structure type, Kaolinite, Bercherin, etc. are mentioned.
Specific examples of the layered silicate having the three-layer structure type (ii) are not particularly limited, but include sericite, groconite, mica, pyrophyllite, kanemite, talc, montmorillonite, smectite, nacrite, halloysite, Antigolite, chrysotile, beidellite, nontronite, saponite, soconite, stevensite, hectorite, and the like.
Among these, smectite, montmorillonite, and talc are preferable from the viewpoint of preventing mechanical abrasion in the spinning process and the knitting process and from the viewpoint of stability when added to the treatment agent.

  Specific examples of the layered double hydroxide include, but are not limited to, stichtite, hydrotalcite, joglenite, pyroaulite, hydrocalumite, barbournite, mixed nelite, motsukoreite, leevesite, tacobite, masse Night etc. are mentioned. Among these, hydrotalcite, massenite, and mixnerite are preferable from the viewpoint of preventing mechanical abrasion in the spinning process and the knitting process and from the viewpoint of stability when added to the treatment agent.

  The Mohs hardness of the inorganic layered compound is preferably 8 or less, more preferably 7 or less, further preferably 6 or less, particularly preferably 5 or less, and most preferably 3 or less. If it exceeds 8, mechanical wear or fiber damage may occur. A preferred lower limit of the Mohs hardness of the inorganic layered compound is 1.

The inorganic layered compound may be used as it is when it is provided as a powder, but can be formed into fine particles using a known method such as a jet mill, a ball mill, or a bead mill. The average particle diameter of the inorganic layered compound is not particularly limited, but is preferably 0.001 to 500 μm, more preferably 0.005 to 50 μm, further preferably 0.01 to 10 μm, and particularly preferably 0.03 to 5 μm. 0.05 to 1 μm is most preferable. When the average particle size of the inorganic layered compound is less than 0.001 μm, the effect of addition may not be seen. On the other hand, if it exceeds 500 μm, it tends to fall off from the fiber surface and may cause scum in the post-spinning process.
As used herein, the average particle diameter means a volume-based average particle diameter measured using a particle size distribution measuring apparatus using a dynamic light scattering method.

As the inorganic layered compound, a compound obtained by treating the organic substance with ion exchange or the like to improve dispersibility can be used. Although it does not specifically limit as said organic substance, A quaternary ammonium salt, a phosphonium salt, an imidazolium salt, a laurate, an aliphatic carboxylate, a sulfate, or a sulfonate can be mentioned.
Specific examples of the quaternary ammonium salt include, but are not limited to, dimethyl distearyl ammonium salt and trimethyl stearyl ammonium salt.
Although it does not specifically limit as a specific example of an aliphatic carboxylate, A stearate etc. can be mentioned.
Although it does not specifically limit as a specific example of a sulfate, A dodecyl sulfate etc. can be mentioned.
Although it does not specifically limit as a specific example of a sulfonate, A dodecyl sulfonate etc. can be mentioned.

[Smoothing agent]
When the processing agent for elastic fibers of the present invention further contains a smoothing agent that is at least one selected from silicone oil, mineral oil, and ester oil, it is preferable from the viewpoint of reducing friction between fibers / metals.

  The silicone oil is not particularly limited, and examples thereof include polydimethylsiloxane, polyalkylsiloxane, and polyalkylphenylsiloxane. You may use together 1 type, or 2 or more types.

  The mineral oil is not particularly limited, and examples thereof include machine oil, spindle oil, and liquid paraffin. Among these, as the mineral oil, liquid paraffin is preferable because the generation of odor is low. Mineral oil may use together 1 type, or 2 or more types.

  Although it does not specifically limit as ester oil, The ester manufactured from a fatty acid and alcohol can be mentioned. Examples of ester oils include esters produced from fatty acids selected from the following and alcohols, but esters that do not use the following fatty acids or alcohols as raw materials may also be used. The ester oil may be used alone or in combination of two or more.

  The fatty acid is not particularly limited in terms of its carbon number, presence or absence of branching, valence, etc., and may be a higher fatty acid, a cyclic fatty acid, or a fatty acid containing an aromatic ring. Examples of the fatty acid include caprylic acid, 2-ethylhexylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachic acid, behenic acid, lignoselenic acid, adipic acid, and sebacic acid. And benzoic acid.

  The alcohol is not particularly limited with respect to its carbon number, presence or absence of branching, valence, etc., and may be a higher alcohol, a cyclic alcohol, or an alcohol containing an aromatic ring. Examples of the alcohol include octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, ethylene glycol, hexanediol, glycerin, trimethylolpropane, Examples include pentaerythritol, sorbitol, sorbitan and the like.

[Other ingredients]
Moreover, the processing agent for elastic fibers of the present invention may further contain a silicone resin in order to improve antistatic properties and unwinding properties. The silicone resin means a silicone having a three-dimensional crosslinked structure, and may further contain other modified silicones and the like. The silicone resin is generally at least one component selected from a monofunctional constituent unit (M), a bifunctional constituent unit (D), a trifunctional constituent unit (T), and a tetrafunctional constituent unit (Q). It consists of units.
Examples of the silicone resin include silicone resins such as MQ silicone resin, MQT silicone resin, T silicone resin, and DT silicone resin.

As the MQ silicone resin, for example, R ¹ R ² R ³ SiO _1/2 that is a monofunctional structural unit (wherein R ¹ , R ^2, and R ³ are all hydrocarbon groups) and tetrafunctional. And a silicone resin containing SiO _4/2 which is a structural unit.
Examples of the MQT silicone resin include R ⁴ R ⁵ R ⁶ SiO _1/2 that is a monofunctional structural unit (wherein R ⁴ , R ^5, and R ⁶ are all hydrocarbon groups) and a tetrafunctional group. And a silicone resin containing SiO _4/2 which is a structural unit and RSiO _3/2 which is a trifunctional unit (wherein R is a hydrocarbon group).

Examples of the T-silicone resin include a silicone resin containing RSiO _3/2 (where R is a hydrocarbon group) which is a trifunctional structural unit (the terminal of which is a hydrocarbon group, silanol group or alkoxy group). Or the like)).
Examples of the DT silicone resin include R ⁷ R ⁸ SiO _2/2 which is a bifunctional structural unit (wherein R ⁷ and R ⁸ are both hydrocarbon groups) and a trifunctional structural unit. RSiO _3/2 (where R is a hydrocarbon group) and the like.

The treatment agent for elastic fibers of the present invention may further contain a metal salt of a higher fatty acid (metal soap) in order to enhance the effect of unwinding.
As the metal salt of higher fatty acid, known ones conventionally used for elastic fibers can be used, and examples thereof include calcium stearate, magnesium stearate, aluminum stearate, barium stearate, zinc stearate and the like. Of these higher fatty acid metal salts, calcium stearate, magnesium stearate and the like are preferred.

  The metal salt of the higher fatty acid can be made into fine particles by a known method such as using a jet mill or a bead mill. Although there is no limitation in particular about an average particle diameter, 0.01-5 micrometers is preferable, 0.02-3 micrometers is more preferable, 0.05-2 micrometers is especially preferable. When the average particle size of the metal salt of the higher fatty acid is less than 0.01 μm, the effect due to the addition may not be observed. On the other hand, if the average particle diameter of the metal salt of higher fatty acid is more than 5 μm, it may easily fall off from the fiber surface and may cause scum in the post-spinning process. In addition, the relative refractive index was set according to the dispersoid and the dispersion medium using a particle size distribution measuring apparatus by a dynamic light scattering method, and the volume-based average particle diameter was measured.

  The treatment agent for elastic fibers of the present invention may further contain a modified silicone in order to improve smoothness and antistatic properties. The modified silicone is generally a reactive (functional) group or a non-reactive group at least at one of both ends, one end, side chain, and both side chains of polysiloxane such as dimethyl silicone (polydimethylsiloxane) ( It has a structure in which at least one functional group is bonded.

  Examples of the modified silicone include alkyl-modified silicones such as modified silicones having long-chain alkyl groups (such as alkyl groups having 6 or more carbon atoms and 2-phenylpropyl groups); ester-modified silicones that are modified silicones having ester bonds; alcohols Carbinol-modified silicone that is a modified silicone having a functional hydroxyl group; Carboxyl-modified silicone that is a modified silicone having an acid anhydride group or carboxyl group; Amino-modified silicone that is a modified silicone having an amino group; A modified silicone having a mercapto group Mercapto-modified silicones; epoxy-modified silicones such as modified silicones having epoxy groups such as glycidyl groups or alicyclic epoxy groups; polyoxyalkylene groups (for example, polyoxyethylene groups, polyoxypro groups) Ren groups, polyether-modified silicones such as modified silicone having a polyoxyethylene polyoxypropylene group), and the like.

  The processing agent for elastic fibers of the present invention may use water as a dispersion medium for dispersing the inorganic layered compound. Since water volatilizes from the fiber and only the inorganic layered compound remains, smoothness may be insufficient. For this reason, you may use together the said smoothing agent and modified silicone, dissolving or emulsifying.

  The treatment agent for elastic fibers of the present invention is a binder, anionic surfactant, cationic surfactant, nonionic surfactant, antioxidant as a stabilizer or antistatic agent for maintaining the quality of the treatment agent. It can further contain components that are usually used in treating agents for elastic fibers, such as agents and ultraviolet absorbers.

[Treatment agent for elastic fibers]
0.001-30 weight% is preferable, as for the weight ratio of the inorganic layered compound to the whole elastic fiber processing agent of this invention, 0.01-20 weight% is more preferable, 0.1-10 weight% is further more preferable, 0.5-5% by weight is most preferred. If it is less than 0.001% by weight, the unraveling property may be inferior. If it exceeds 30% by weight, the effect corresponding to the amount added may not be obtained.

  When the treatment agent of the present invention contains a smoothing agent, the weight ratio of the smoothing agent to the entire elastic fiber treatment agent is preferably 40 to 99.9% by weight, more preferably 50 to 98% by weight, and 70 to 95% by weight. % Is more preferable, and 80 to 90% by weight is particularly preferable. If it is less than 40% by weight, the smoothness may decrease.

  When the treatment agent of the present invention contains a silicone resin, the weight ratio of the silicone resin in the entire elastic fiber treatment agent is not particularly limited, but is preferably 0.01 to 10% by weight, preferably 0.05 to 7% by weight. Is more preferable, and 0.1 to 5% by weight is particularly preferable. If the weight ratio of the silicone resin is less than 0.01% by weight, the effect of addition may not be seen. On the other hand, if it exceeds 10% by weight, an appropriate balance of treatment agent performance may not be maintained.

  When the treatment agent of the present invention contains a metal salt of a higher fatty acid, the weight ratio of the metal salt of the higher fatty acid in the whole treatment agent for elastic fibers is not particularly limited, but is preferably 0.01 to 10% by weight. 2 to 5% by weight is more preferable, and 0.5 to 3% by weight is particularly preferable. When the weight ratio of the metal salt of the higher fatty acid is less than 0.01% by weight, the effect due to the addition may not be seen because the amount is too small. On the other hand, if it exceeds 10% by weight, an effect commensurate with the addition of a large amount cannot be obtained, which may be economically disadvantageous.

  When the treatment agent of the present invention contains a modified silicone, the polymerization rate of the modified silicone in the entire elastic fiber treatment agent is not particularly limited, but is preferably 0.01 to 10% by weight, preferably 0.05 to 7% by weight. Is more preferable, and 0.1 to 5% by weight is particularly preferable. If the weight ratio of the modified silicone is less than 0.01% by weight, the effect due to the addition may not be observed because the amount is too small. On the other hand, if it exceeds 10% by weight, the proper performance of the treatment agent may not be obtained.

  As a method for producing the treatment agent for elastic fibers of the present invention, a known method can be applied, and the components can be added and mixed in any order. If powders such as inorganic layered compounds and higher fatty acid metal salts are added to the treatment agent and mixed, it may not be possible to mix uniformly. Therefore, after adding the powder, it may be processed with a homomixer, homogenizer, jet mill or bead mill. preferable. By adding such a treatment after the powder is added, the stability of the product is improved.

3-50 mm < ² > / s is preferable, as for the viscosity (25 degreeC) of the processing agent for elastic fibers of this invention, 5-30 mm < ² > / s is more preferable, and 8-20 mm < ² > / s is especially preferable. If it is less than 3 mm ² / s, volatilization of the treatment agent for elastic fibers may be a problem, and if it exceeds 50 mm ² / s, the elastic fibers may be taken by a roller and thread cutting may occur.

[Elastic fiber]
The elastic fiber of the present invention is an elastic fiber in which the elastic fiber treating agent is added to the entire elastic fiber in an amount of 0.1 to 15% by weight, preferably 1 to 10% by weight. If it is less than 0.1% by weight, the effect of the present invention is not sufficient, and if it exceeds 15% by weight, it is uneconomical. A known method can be adopted as the providing method.

  The elastic fiber (elastic fiber body) of the present invention is a fiber having elasticity using polyether polyurethane, polyester polyurethane, polyether ester elastomer, polyester elastomer, polyethylene elastomer, polyamide elastomer, etc., and its elongation is Usually 300% or more. Polyolefin elastic fibers having soft stretch properties and polytrimethylene terephthalate fibers may also be included.

  As the elastic fiber of the present invention, 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 PTMG / MDI = 1/2 to 1/1. 20 (molar ratio) of a polyurethane urea polymer obtained by reacting in a solvent such as dimethylacetamide or dimethylformamide and reacting with 80 to 100% of excess isocyanate with a diamine such as ethylenediamine or propanediamine to extend the chain. A polyurethane urea elastic fiber that can be produced by spinning a ~ 40% solution by dry spinning at a spinning speed of 400 to 800 m / min is preferred.

The treatment agent of the present invention is preferably used for fibers having an elastic fiber fineness of 5 to 4000 dtex.
As an application of the elastic fiber of the present invention, it can be used as a fabric by processing yarn such as covering yarn such as CSY, single covering, PLY and air covering, circular knitting, tricot and the like. In addition, using these processed yarns and fabrics, products that require elasticity such as stockings, socks, underwear and swimwear, and outerwear such as jeans and suits are given elasticity for comfort. Also used for purposes. More recently, it has been applied to disposable diapers.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples described herein. The percent (%) and part shown in the following examples indicate “% by weight” and “part by weight” unless otherwise specified. Each characteristic in the examples was evaluated according to the following method.

[Evaluation method of peptizers]
(Particle size)
The average particle size was measured using a particle size distribution measuring apparatus by a dynamic light scattering method, the relative refractive index was set according to the dispersoid and the dispersion medium, and the volume-based average particle size was measured.

[Method for evaluating unraveling]
In FIG. 1, the cheese (1) of the fiber which gave the processing agent to the unwinding side of the unwinding speed ratio measuring machine is set, and the paper tube (2) is set to the winding side. After setting the winding speed to a constant speed, the rollers (3) and (4) are started simultaneously. In this state, there is almost no tension on the yarn (5), so the yarn is stuck on the cheese and does not leave, so the unwinding point (6) is in the state shown in FIG. By changing the unwinding speed, the unwinding point (6) of the yarn (5) from the cheese is changed, and the unwinding speed is set so that this point coincides with the contact point (7) between the cheese and the roller. The unraveling speed ratio is obtained by the following equation a. The smaller this value is, the better the unpacking property is.
Unwinding speed ratio (%) = ((winding speed−unwinding speed) ÷ unwinding speed) × 100 (formula a)
Moreover, the above evaluation criteria set ○ or more as acceptable.
A: Less than 10% (very good)
○: 10 or more and less than 60% (good)
×: Over 60% (defect)

[Knitting tension measurement method]
In FIG. 2, the elastic yarn (9) taken vertically from the cheese (8) is passed through the compensator (10), the roller (11), and the roller (14) attached to the U gauge (13) via the knitting needle (12). ) And connected to a speedometer (15) and a take-up roller (16). The rotational speed of the take-up roller is adjusted so that the traveling speed of the speedometer (15) becomes a constant speed (100 m / min), the take-up roller is taken up, and the knitting tension at that time is measured with a U gauge (13). And the friction (g) between the fibers / knitting needles is measured.

[Antistatic evaluation method]
In FIG. 2 of the above knitting tension, the amount of static electricity on the yarn is measured with a Kasuga-type potentiometer (17) at 1 cm from the running yarn.
Moreover, the above evaluation criteria set ○ or more as acceptable.
A: Less than 2.0 (kv) (very good)
○: 2.0 or more and less than 10.0 (kv) (good)
×: Over 10 (kv) (defect)

[Friction coefficient measurement method between fibers]
In FIG. 3, a monofilament of elastic fiber to which a treatment agent has been applied is taken about 50 to 60 cm, a load T1 (18) is suspended at one end, and the other is attached to the U gauge (20) via a roller (19). The ends are pulled at a constant speed (for example, 3 cm / min), the secondary tension T2 at that time is measured with a U gauge (20), and the inter-fiber friction coefficient is obtained by the following equation b.
Friction coefficient (F / FμS) = 1 / θ · ln (T2 / T1) (Formula b)
(In formula b, θ = 2π, ln = natural logarithm, T1 is 1 g per 22 dtex)

(Adjustment of spinning dope)
A polytetramethylene ether glycol having a number average molecular weight of 2000 and 4,4′-diphenylmethane diisocyanate were reacted at a molar ratio of 1: 2, and then chain-extended using a 1,2-diaminopropane solution in dimethylacetamide, with a polymer concentration of 27%. A dimethylacetamide solution was obtained. The viscosity at 30 ° C. was 1500 mPaS.

(Examples 1-38, 40-51 and Comparative Examples 1-5)
The treating agent (the blending amount in the table is part by weight) was prepared by mixing the components described below in any order. As for the inorganic layered compounds, layered silicates were used in Tables 1 to 4, and layered double hydroxides were used in Tables 5 and 6. In Comparative Examples 1 to 5, no inorganic layered compound was used. After mixing all the components of the treatment agent, it was prepared by dispersing using a bead mill. In addition, the average particle diameter of the inorganic stratiform compound and magnesium stearate in the table is a measured value after dispersing the bead mill.
(Example 39)
Mineral oil and magnesium stearate were mixed in the ratio shown in the table and dispersed with a bead mill to prepare a mineral oil solution. At this time, the average particle size of magnesium stearate was 0.94 μm. Next, dimethyl silicone and hydrotalcite were mixed in the ratio shown in the table, and dispersed with a bead mill to prepare a dimethyl silicone solution. At this time, the average particle size of the hydrotalcite was 0.94 μm. The mineral oil solution and the dimethyl silicone solution were mixed at the mineral oil solution: the dimethyl silicone solution = 45: 55 (weight ratio) to prepare a treatment agent.

The following silicone resins, polyether-modified silicones, and amino-modified silicones were used.
Silicone resin * 1: MQ silicone resin, 550 mm ² / s (25 ° C.)
Polyether-modified silicone * 2: Side chain PO / EO modified type, 150 mm ² / s (25 ° C.)
Amino-modified silicone * 3: Side-chain modified type, amine value 28 KOH mg / g, 3500 mm ² / s (25 ° C.)

Next, the polyurethane spinning dope was discharged into a N ₂ stream at 230 ° C. to dry-spin. After the treatment agent prepared for the running yarn during spinning was applied to the fiber by 6% by weight, it was wound on a bobbin at a speed of 500 m / min to obtain 44 dtex / 4f cheese (400 g of winding amount). The obtained cheese was left for 72 hours in an atmosphere of 80 ° C. and 50% RH for evaluation. These results are shown in Tables 1-7. (However, Examples 1-32 and Example 41 are referred to as Reference Examples 1-32 and Reference Example 41, respectively.)

As can be seen from Tables 1 to 6, in Examples 1 to 51, since the elastic fiber treatment agent containing the inorganic layered compound is used, it can be seen that it has good unwinding properties and antistatic properties. .
On the other hand, the effect of this invention is not acquired for the processing agent for elastic fibers (Comparative Examples 1-5) which does not contain an inorganic layered compound.

DESCRIPTION OF SYMBOLS 1 Cheese of elastic fiber 2 Winding paper tube 3 Roller 4 Roller 5 Traveling yarn 6 Unwinding point 7 Cheese and roller contact 8 Elastic fiber cheese 9 Yarn 10 Compensator 11 Roller 12 Knitting needle 13 U gauge 14 Roller 15 Speedometer 16 Winding roller 17 Kasuga type potential measuring device 18 Load 19 Roller 20 U gauge

Claims (5)

The inorganic layered compound be an elastic fiber-processing agent you containing mandatory,
Further containing at least one leveling agent selected from silicone oil, mineral oil and ester oil, wherein the inorganic layered compound contains a layered double hydroxide, and the weight ratio of the leveling agent to the whole treating agent for elastic fibers Is 40-99.9 weight%, the processing agent for elastic fibers. The processing agent for elastic fibers according to claim 1, wherein the layered double hydroxide contains at least one selected from hydrotalcite, massenite, and mixnerite .   The processing agent for elastic fibers according to claim 1 or 2, wherein the inorganic layered compound has an average particle size of 0.001 to 500 µm.   The processing agent for elastic fibers according to any one of claims 1 to 3, wherein a weight ratio of the inorganic layered compound to the entire processing agent is 0.01 to 30% by weight. The elastic fiber with which the processing agent in any one of Claims 1-4 was provided with respect to the elastic fiber main body.

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