JPH11217771A - Synthetic fiber treating agent and treatment of synthetic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a heater from fouling by applying a treating agent prepared by compounding a polyether compound with a polyorganosiloxane and an ionic surfactant to a synthetic fiber fed to a heat- treating step. SOLUTION: This treating agent is prepared by compounding a polyether compound with 0.1-12 wt.% of one or more of polyorganosiloxanes selected from a cyclic or a linear polyorganosiloxane containing 4 12 bound siloxane units represented by formula I (R<1> and R<2> are each a 1-4C alkyl) and a polyorganosiloxane containing the siloxane units represented by formula I and formula II (R<3> is a 1-4C fluoroalkyl or phenyl; R<4> is a 1-4C fluoroalkyl or a 1-4C alkyl) in the total number of 4-12 bound in a cyclic or a linear form and further 0.1-12 wt.% of an ionic surfactant. The resultant treating agent in an amount of 0.1-3 wt.% is further applied to a synthetic fiber filament yarn fed to a step accompanied by heat treatment such as a false twisting step.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic fiber treating agent (hereinafter, simply referred to as a treating agent) and a synthetic fiber treating method (hereinafter, referred to as a treating agent).
Simply referred to as a processing method). In the process of manufacturing or processing synthetic fibers, a treating agent containing a lubricant and an antistatic agent is attached to the synthetic fibers to impart lubricity and antistatic properties. When the synthetic fiber is subjected to a heat treatment step, for example, a false twisting step, it is possible to prevent heater contamination due to thermal deterioration of the treating agent in the false twisting step, to suppress the generation of fluff and yarn breakage, and to obtain a high quality false twisted yarn. Important above. The present invention relates to a treatment agent and a treatment method capable of effectively preventing such heater contamination.

[0002]

2. Description of the Related Art Conventionally, a mixture of a polyether compound, a polyorganosiloxane compound, and an ionic surfactant has been used as a treating agent for preventing such heater contamination. In such a conventional treating agent, as the polyorganosiloxane compound to be mixed, 1) a viscosity at 25 ° C. of 30 × 10 ⁻⁶ m ² / s or more and a surface tension at 25 ° C. of 2
8 dynes / cm or less of polydimethylsiloxane or fluoroalkyl-modified polydimethylpolysiloxane (Japanese Unexamined Patent Publication No.
46923), 2) The viscosity at 30 ° C. is 15 × 10 ⁻⁶ m ² /
s or higher polydimethylsiloxane (JP-A-48-530)
93), 3) Viscosity at 30 ° C. is 10 × 10 ⁻⁶ to 80 × 10
^-6 m ² / s phenylpolysiloxane (JP-B 47-5)
0657) and 4) polyether-modified silicone (JP-B-63-57548). However, with these conventional treatment agents, the prevention of heater contamination in the heat treatment step is insufficient, especially when the heat treatment step is a false twisting step using a recently developed high-temperature short heater exceeding 300 ° C. There is a disadvantage that there is almost no effect of preventing contamination. If the prevention of heater contamination in the heat treatment step is insufficient, fluffing, yarn breakage, etc. will occur, making it impossible to produce high quality processed yarn.

[0003]

The problem to be solved by the present invention is that conventional processing agents cannot sufficiently prevent heater contamination in a heat treatment step, especially in a false twisting step using a high-temperature short heater. is there.

[0004]

Means for Solving the Problems Thus, the present inventors have
In the heat treatment step of synthetic fiber filament yarn, especially in the false twisting step using a high-temperature short heater, as a result of studying to obtain a treatment agent and a treatment method capable of sufficiently preventing heater contamination in such a step, a polyether compound and A treating agent comprising a specific polyorganosiloxane and an ionic surfactant, wherein the treating agent containing the polyorganosiloxane and the ionic surfactant in a predetermined ratio is correctly and suitably used. It has been found that it is correctly and suitably applied to a synthetic fiber filament yarn to be subjected to a heat treatment step at a predetermined ratio.

That is, the present invention relates to a treating agent comprising a polyether compound, the following polyorganosiloxane and an ionic surfactant, wherein the treating agent comprises 0.1 to 12% by weight of the polyorganosiloxane. And the ionic surfactant is contained in a proportion of 0.1 to 12% by weight, respectively, and a synthetic fiber filament yarn for subjecting the treating agent to a heat treatment step. The present invention relates to a processing method characterized by adhering so as to be 0.1 to 3% by weight with respect to the strip.

Polyorganosiloxane: The following polyorganosiloxane A, the following polyorganosiloxane B,
One or more polyorganosiloxanes selected from the following polyorganosiloxanes C and the following polyorganosiloxanes D Polyorganosiloxanes A: 4 to 12 siloxane units represented by the following formula 1 are cyclically bonded Polyorganosiloxane Polyorganosiloxane B: A cyclic polyorganosiloxane in which a total of 4 to 12 siloxane units represented by the following formula 1 and a siloxane unit represented by the following formula 2 are cyclically bonded, and A cyclic polyorganosiloxane having a siloxane unit represented by the following formula 2 in a proportion of 25 mol% or less: polyorganosiloxane C: a linear polysiloxane in which 4 to 12 siloxane units represented by the following formula 1 are linearly bonded Organosiloxane Polyorganosiloxane D: White represented by the following formula 1 A linear polyorganosiloxane in which a total of 4 to 12 siloxane units and siloxane units represented by the following formula 2 are linearly bonded, and 25 mol of the siloxane units represented by the following formula 2 in all siloxane units. % Or less of the linear polyorganosiloxane

[0007]

(Equation 1)

(Equation 2)

In the formulas (1) and (2), R ¹ and R ^{2 are the} same or different alkyl groups each having 1 to 4 carbon atoms R ³ : a fluoroalkyl group having 1 to ⁴ carbon atoms or a phenyl group R ⁴ : 1 to ⁴ carbon atoms 4 fluoroalkyl groups or 1 to 1 carbon atoms
Alkyl group of 4

In the treating agent of the present invention, one or more polyorganosiloxanes selected from the above-mentioned polyorganosiloxane A, polyorganosiloxane B, polyorganosiloxane C and polyorganosiloxane D are used.

The polyorganosiloxane A is a cyclic polyorganosiloxane in which 4 to 12 siloxane units of the formula 1 are cyclically bonded. The siloxane unit represented by the formula 1 includes 1) a dialkylsiloxane unit substituted with the same alkyl group such as a dimethylsiloxane unit, a diethylsiloxane unit, a dipropylsiloxane unit, a dibutylsiloxane unit, 2) a methylethylsiloxane unit, Dialkylsiloxane units substituted with different alkyl groups, such as methylbutylsiloxane units, are included. As the polyorganosiloxane A, those in which the siloxane unit represented by the formula 1 is a dimethylsiloxane unit are preferable.

The polyorganosiloxane B is a cyclic polyorganosiloxane in which a total of 4 to 12 siloxane units of the formula 1 and 2 of the siloxane unit of the formula 2 are cyclically bonded, and the formula 2 Is a cyclic polyorganosiloxane having a siloxane unit of 25 mol% or less. The siloxane unit represented by the formula 1 is as described above, but the siloxane unit represented by the formula 2 includes 1) a difluoroalkylsiloxane unit, 2) a fluoroalkylalkylsiloxane unit, and 3) a phenylfluoroalkylsiloxane. unit,
4) Phenylalkylsiloxane units are included.
Examples of the fluoroalkyl group contained in the siloxane unit include a partially fluorinated alkyl group such as a γ-trifluoropropyl group and a β, γ-pentafluoropropyl group, as well as a heptafluoropropyl group and a pentafluoroethyl group. And a fluorine-substituted alkyl group. As the polyorganosiloxane B, those in which the siloxane unit represented by the formula 1 is a dimethylsiloxane unit and the siloxane unit represented by the formula 2 is a fluoroalkylmethylsiloxane unit are preferable. In the polyorganosiloxane B, the proportion of the siloxane unit represented by the formula 2 is 25 mol% or less of the total siloxane unit, but is usually 7 to 2 mol%.
It is preferable to set the ratio to 5 mol%.

The polyorganosiloxane C is a linear polyorganosiloxane in which 4 to 12 siloxane units of the formula 1 are linearly bonded. The siloxane unit represented by Formula 1 is as described above. As the polyorganosiloxane C, those in which the siloxane unit represented by the formula 1 is a dimethylsiloxane unit are preferable.

The polyorganosiloxane D is a linear polyorganosiloxane in which a total of 4 to 12 siloxane units represented by the formula 1 and a siloxane unit represented by the formula 2 are bonded in a linear manner. It is a linear polyorganosiloxane having a siloxane unit represented by the formula 2 in a proportion of 25 mol% or less. The siloxane unit represented by the formula 1 and the siloxane unit represented by the formula 2 are as described above. As the polyorganosiloxane D, those in which the siloxane unit represented by the formula 1 is a dimethylsiloxane unit and the siloxane unit represented by the formula 2 is a fluoroalkylmethylsiloxane unit are preferable. In the polyorganosiloxane D, the formula 2
The siloxane unit represented by is 25% of the total siloxane unit.
Although the ratio is set to not more than mol%, it is usually preferable to set the ratio to 7 to 25 mol%.

The above-mentioned polyorganosiloxane C and polyorganosiloxane D used in the present invention are linear polyorganosiloxanes as described above, and the terminal group thereof is a trialkylsilyl group having an alkyl group having 1 to 4 carbon atoms. Are preferred. Examples of such a trialkylsilyl group include a trimethylsilyl group, a triethylsilyl group, a tributylsilyl group, and a dimethylethylsilyl group. Among them, a trimethylsilyl group is preferable.

The present invention does not particularly limit the method for synthesizing the polyorganosiloxane used in the present invention. Examples of the method include a trialkyl halide silane, a dialkyl halide and a dialkyl halide in the presence of an acidic catalyst such as sulfuric acid or hydrochloric acid. There is a method in which silane, fluoro-alkyl halogenated silane, phenyl-alkyl halogenated silane, or the like is appropriately combined, hydrolyzed, and condensed.

As the ionic surfactant used in the present invention, known anionic surfactants, cationic surfactants, and amphoteric surfactants can be used. Among them, a quaternary onium salt represented by the following formula 3 is preferable as the ionic surfactant.

[0017]

(Equation 3)

In the formula 3, Y: N or PR ⁵ , R ⁶ , R ⁷ , R ⁸ : the same or different carbon number of 1 to 1
25 alkyl group, hydroxyalkyl group having 1 to 6 alkenyl group carbon atoms or 2 to 25 carbon atoms A ^n-: phosphoric acid esters having 1 to 30 carbon atoms, 1 to 3 carbon atoms
N-valent anionic group obtained by removing hydrogen ions from an organic acid selected from a sulfuric acid ester having 0, a sulfonic acid ester having 1 to 30 carbon atoms and a carboxylic acid having 1 to 30 carbon atoms;

The quaternary onium salt represented by Formula 3 includes:
1) a quaternary ammonium salt comprising a quaternary ammonium cation group when Y in the formula 3 is N and an anion group obtained by removing a part or all of hydrogen ions from a monovalent to trivalent organic acid; 2) A quaternary phosphonium salt comprising a quaternary phosphonium cation group in the case where Y in the formula 3 is P and an anion group obtained by removing a part or all of hydrogen ions from a monovalent to trivalent organic acid is included.

First, the quaternary ammonium salt will be described. The quaternary ammonium cation group constituting the quaternary ammonium salt includes 1) R ^{5 to} R ⁸ in Formula 3 (hereinafter, Formula 3)
A quaternary ammonium cation group in the case where each of them is an alkyl group having 1 to 25 carbon atoms, 2)
A quaternary ammonium cation group when all of the organic groups in Formula 3 are alkenyl groups having 2 to 25 carbon atoms; 3) all of the organic groups in Formula 3 are hydroxyalkyl groups having 1 to 6 carbon atoms. A quaternary ammonium cation group,
4) a quaternary ammonium cation group in the case where a part of the organic groups in the formula 3 is an alkyl group having 1 to 25 carbon atoms and the remainder is an alkenyl group having 2 to 25 carbon atoms;
A quaternary ammonium cation group in which a part of the organic groups in the above is an alkyl group having 1 to 25 carbon atoms and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms; A quaternary ammonium cation group in which a part of the groups is an alkenyl group having 2 to 25 carbon atoms and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms; 7) an organic group in Formula 3 A part of which is an alkyl group having 1 to 25 carbon atoms, another part is an alkenyl group having 2 to 25 carbon atoms, and the rest is a hydroxyalkyl group having 1 to 6 carbon atoms. Ammonium cationic groups are included.

The quaternary ammonium cation groups include: 1) tetramethylammonium, triethylmethylammonium, tripropylethylammonium, tributylmethylammonium, tetrabutylammonium, triisooctylethylammonium, trimethyloctylammonium, dilauryldimethylammonium Quaternary ammonium cation groups when all the organic groups in Formula 3 are alkyl groups having 1 to 25 carbon atoms, such as trimethylstearyl ammonium, and 2) dibutenyl diethyl ammonium, dimethyldiole ammonium, trimethyl oleyl ammonium , Triethyleicosenyl ammonium and the like, some of the organic groups in Formula 3 are alkyl groups having 1 to 25 carbon atoms, and the remainder is an alkenyl group having 2 to 25 carbon atoms. Quaternary ammonium cation group, 3) tributyl hydroxyethyl ammonium, di (hydroxyethyl) dipropyl ammonium, tri (hydroxyethyl) octyl ammonium is a group,
Tri (hydroxypropyl) methyl ammonium and the like,
A quaternary ammonium cation group in the case where a part of the organic groups in Formula 3 is an alkyl group having 1 to 25 carbon atoms and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms is preferable. All of the organic groups in 3 have 1 to 12 carbon atoms.
A quaternary ammonium cation group in the case of an alkyl group of formula (1), a part of which is an alkenyl group having 16 to 22 carbon atoms among organic groups in the formula 3, and a remainder is an alkyl group having 1 to 12 carbon atoms. A quaternary ammonium cation group, a quaternary ammonium when a part of the organic groups in Formula 3 is a hydroxyalkyl group having 2 to 4 carbon atoms and the remainder is an alkyl group having 1 to 12 carbon atoms Cationic groups are particularly preferred. This includes, for example, tributyl methyl ammonium,
Tetrabutylammonium, trimethyloleylammonium, di (hydroxyethyl) methyloctylammonium and the like can be mentioned.

The anionic group constituting the quaternary ammonium salt is an anionic group obtained by removing a part or all of hydrogen ions from a monovalent to trivalent organic acid. Examples of such a monovalent to trivalent organic acid include: 1) phosphoric acid esters having 1 to 30 carbon atoms, such as methyl phosphate, diethyl phosphate, dioctyl phosphate, methyl oleyl phosphate, and nonylphenyloxyethoxyethyl methyl phosphate;
2) Methyl sulfate, ethyl sulfate, lauryl sulfate, octylphenyloxy polyethoxy (the number of repeating ethoxy units is 3, hereinafter referred to as n = 3)
A sulfuric ester having 1 to 30 carbon atoms such as ethyl sulfate, 3) butyl sulfonate, lauryl sulfonate,
Stearyl sulfonate, oleyl sulfonate, p-
C1-30 sulfonic acid esters such as toluenesulfonate, dodecylphenylsulfonate, oleylphenylsulfonate, naphthylsulfonate, diisopropylnaphthylsulfonate, 4) acetic acid, caproic acid, lauric acid, 2-ethylhexanoic acid, isostearic acid, olein Acids, aliphatic monocarboxylic acids having 1 to 30 carbon atoms such as erucic acid, aliphatic dicarboxylic acids having 1 to 30 carbon atoms such as malonic acid, adipic acid, sebacic acid, pentadecenylsuccinic acid, benzoic acid, phthalic acid Acids, aromatic carboxylic acids having 1 to 30 carbon atoms such as trimellitic acid, lactic acid, ricinoleic acid, 1 to 1 carbon atoms such as 12-hydroxystearic acid
30 aliphatic hydroxycarboxylic acids, sulfur-containing aliphatic carboxylic acids having 1 to 30 carbon atoms such as thiodipropionic acid,
Carboxylic acids having 1 to 30 carbon atoms are exemplified. Among them, aliphatic phosphates having 1 to 26 carbon atoms, 1 to 26 carbon atoms
The aliphatic sulfonic acid ester having 1 to 26 carbon atoms is preferable, and the aliphatic sulfonic acid ester having 8 to 24 carbon atoms and the aliphatic carboxylic acid having 8 to 24 carbon atoms are particularly preferable. This includes, for example, lauryl sulfonate,
Oleyl sulfonate, isostearic acid, oleic acid, pentadecenyl succinic acid and the like can be mentioned.

The present invention does not particularly limit the method for synthesizing the quaternary ammonium salt used in the present invention. Examples of the method include: 1) a method of reacting a corresponding tertiary amine with a trialkyl phosphate; ) A method of reacting the corresponding tertiary amine with a dialkyl sulfate, 3) the corresponding 3
A method of reacting a tertiary amine with ethylene oxide in the presence of water to form a quaternary ammonium hydroxide and then reacting with a sulfonic acid ester; 4) reacting a corresponding tertiary amine with an alkyl halide to form a quaternary ammonium hydroxide; Um halide, and then a reaction with a metal carboxylate.

Next, the quaternary phosphonium salt will be described. The quaternary phosphonium cation group constituting the quaternary phosphonium salt includes: 1) a quaternary phosphonium cation group in the case where all of the organic groups in Formula 3 are alkyl groups having 1 to 25 carbon atoms; Each of the organic groups in 3 has 2 carbon atoms
A quaternary phosphonium cation group in the case of an alkenyl group having from 25 to 25;
A quaternary phosphonium cation group in the case of a hydroxyalkyl group of 6; 4) a part of the organic groups in the formula 3 is an alkyl group having 1 to 25 carbon atoms;
5) a quaternary phosphonium cation group when the alkenyl group is 5) 5) a part of the organic groups in Formula 3 having 1 to 1 carbon atoms;
A quaternary phosphonium cation group in the case where the alkyl group is 25 alkyl groups, and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms; 6) some of the organic groups in Formula 3 have 2 to 2 carbon atoms;
A quaternary phosphonium cation group when the alkenyl group is 5 and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms; 7) a part of the organic groups in the formula 3 has a carbon number of 1 to 2;
And a quaternary phosphonium cation group when the other is an alkenyl group having 2 to 25 carbon atoms and the remainder is a hydroxyalkyl group having 1 to 6 carbon atoms.

Examples of the quaternary phosphonium cation group include: 1) any of the organic groups in Formula 3 such as tetramethylphosphonium, tributylmethylphosphonium, tetrabutylphosphonium, methyltrioctylphosphonium, lauryltrimethylphosphonium, etc. A quaternary phosphonium cation group in the case of an alkyl group of from 25 to 25, 2) an alkenyl group having 2 to 25 carbon atoms among organic groups in the formula 3, such as trimethyl oleyl phosphonium and oleyl tripropenyl phosphonium; In some cases, a quaternary phosphonium cation group, 3) tributyl (2-hydroxyethyl) phosphonium, trioctyl (4-hydroxybutenyl) phosphonium, and some of the organic groups in Formula 3 have 1 to 6 carbon atoms. Quaternary e when it is a hydroxyalkyl group of Preferably ho cation group,
Of these, a quaternary phosphonium cation group in which all of the organic groups in Formula 3 are alkyl groups having 1 to 4 carbon atoms is particularly preferred. This includes, for example, tributylmethylphosphonium, tetrabutylphosphonium and the like.

The anion group constituting the quaternary phosphonium salt is the same as the anion group described above for the quaternary ammonium salt.

The present invention does not particularly limit the method for synthesizing the quaternary phosphonium salt to be used in the present invention, and includes, for example, a method in which a corresponding metal salt or ammonium salt of an organic acid and a quaternary phosphonium salt are used. A method of mixing in a solvent and washing and separating an inorganic salt by-produced with water, or a method of extracting with an organic solvent such as methanol, isopropanol, and acetone is exemplified.

As the polyether compound used in the present invention, known polyether compounds, for example, JP-A-56-3
No. 1077 and Japanese Patent Publication No. 63-57548 can be applied. As such a polyether compound, polyether (poly) ols such as polyether monool, polyether diol, and polyether triol having an oxyethylene unit and an oxypropylene unit as main constitutional units are preferable. 20,000 is preferred. The polyether compound includes a mixture of polyether compounds having different molecular weights. When such a mixture is used, a mixture of a polyether compound having an average molecular weight of 1,000 to 3,000 and a polyether compound having an average molecular weight of 5,000 to 15,000 is used. Is preferred.

The treating agent of the present invention comprises a polyether compound as described above, a polyorganosiloxane and an ionic surfactant, and contains the polyorganosiloxane in a proportion of 0.1 to 12% by weight. The ionic surfactant is contained at a ratio of 0.1 to 12% by weight. The polyorganosiloxane is contained at a ratio of 0.3 to 5% by weight, and the ionic surfactant is used as the ionic surfactant. It is preferable that the quaternary onium salt is contained in a proportion of 0.3 to 5% by weight.

In the treatment method of the present invention, the treatment agent of the present invention is preferably used in an amount of 0.1 to 3% by weight, preferably 0.1 to 3% by weight, based on the synthetic fiber filament yarn to be subjected to the heat treatment step.
It is deposited so as to be 2 to 1% by weight. Usually, a treating agent is attached to the synthetic fiber filament yarn immediately after spinning in the spinning step, and then the synthetic fiber filament yarn is subjected to a heat treatment step.

As described above, the treatment method of the present invention is characterized in that the treatment agent of the present invention is adhered to the synthetic fiber filament yarn at a predetermined ratio to thereby provide a good lubrication to the synthetic fiber filament yarn to be subjected to the heat treatment step. And thereby prevent heater contamination in the heat treatment step. Such a heat treatment step includes a drawing step, a twisting step, a crimping step, a false twisting step, and the like. Among them, the treatment agent and the treatment method of the present invention are highly effective when applied to the false twisting step. As the false twisting machine used in the false twisting step, 1) a heater temperature of 150 to 230 ° C and a heater length of 150 to 250 cm.
2) Heater temperature 300 to 600, contact heater type false twister in which synthetic fiber filament yarn runs while contacting on the heater plate
° C., equipped with a heater having a heater length of 20 to 150 cm,
A high temperature short heater type false twisting machine or the like in which a synthetic fiber filament yarn runs on a heater plate in a non-contact manner may be mentioned. In particular, the treatment agent and treatment method of the present invention employ a heater temperature of 350 to 550 ° C and a heater length of 20 to 140cm
The effect is high when a high-temperature short heater of the type described above is mounted and subjected to a false twisting process using a false twisting machine that travels in contact with a yarn path regulation guide installed in the heater.

The treatment method of the present invention does not particularly limit the method of adhering the treatment agent of the present invention to the synthetic fiber filament yarn. Examples of the adhering method include a roller lubrication method and a guide lubrication method using a metering pump. A known method such as a lubrication method, an immersion lubrication method, or a spray lubrication method may be mentioned, but a roller lubrication method or a guide lubrication method using a metering pump is preferable.

In attaching the treating agent of the present invention to a synthetic fiber filament yarn, the treating agent can be used in the form of an aqueous emulsion, an organic solvent solution, or as it is, but is preferably used as an aqueous emulsion. preferable. In this case, an emulsifier can be used as needed, but it is preferable to prepare an aqueous emulsion so that the treatment agent is contained at a ratio of 5 to 30% by weight. When attaching the treating agent to the synthetic fiber filament yarn,
Other components, for example, antioxidants, preservatives, rust preventives, etc. can be included in the treating agent or the aqueous emulsion for the purpose, but the amount used is preferably as small as possible.

As synthetic fiber filament yarns to which the treatment agent and treatment method of the present invention are applied, 1) polyester filament yarns having ethylene terephthalate as a main constituent unit, and 2) polyamide filament yarns such as nylon 6 and nylon 66. 3) Polyacryl filament yarn such as polyacrylonitrile, modacrylic, etc. 4) Polyolefin filament yarn such as polyethylene, polypropylene, etc. Among them, there is an effect when applied to polyester filament yarn and polyamide filament yarn. Higher, more effective when applied to polyester partially drawn yarn, polyamide partially drawn yarn and polyester direct spun drawn yarn.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the treatment agent and treatment method of the present invention include the following 1) to 30). 1) Butoxy polyalkylene glycol ether having an average molecular weight of 1,000 / polyalkylene glycol ether having an average molecular weight of 7000 = 50/50 (weight ratio) polyether compound (P-1) and six dimethylsiloxane units are cyclically bonded. Cyclic polyorganosiloxane (A-
1) and tributylmethylammonium stearate {ionic surfactant (QS-1)}, 96% by weight of polyether compound (P-1) and cyclic polyorganosiloxane (A-1) A treatment agent comprising 2% by weight and 2% by weight of an ionic surfactant (QS-1). The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 2) converting the treating agent of the above 1) into an aqueous emulsion;
A method in which the aqueous emulsion is applied as a treating agent to the polyester partially drawn yarn so as to be 0.5% by weight, and is subjected to a false twisting step using a high-temperature short heater type false twisting machine with a heater temperature of 510 ° C.

3) The polyether compound (P-1), the cyclic polyorganosiloxane (A-1) and the ionic surfactant (QS-1), and the polyether compound (P-1) 93% by weight, 5% by weight of the cyclic polyorganosiloxane (A-1), an ionic surfactant (QS-
A treating agent containing 1) at a ratio of 2% by weight.
The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 4) making the treating agent of the above 3) an aqueous emulsion;
A method in which the aqueous emulsion is applied as a treating agent to the polyester partially drawn yarn so as to be 0.5% by weight, and is subjected to a false twisting step using a high-temperature short heater type false twisting machine with a heater temperature of 510 ° C.

5) Polyether compound (P-1) and 8
Polydimethylsiloxane (A-2) in which two dimethylsiloxane units are cyclically bonded, and an ionic surfactant (QS-1), and a polyether compound (P
-1), 93% by weight of cyclic polyorganosiloxane (A)
-2) 2% by weight and ionic surfactant (QS-1) at 5% by weight. This treating agent was used as an aqueous emulsion, and the aqueous emulsion was used as a treating agent for the polyester partially drawn yarn.
5% by weight.
A method of subjecting to a false twisting step using a contact heater type false twisting machine at 10 ° C. 6) converting the treating agent of the above 5) into an aqueous emulsion;
A method in which the aqueous emulsion is applied as a treating agent to the polyester partially drawn yarn so as to be 0.5% by weight, and is subjected to a false twisting step using a high-temperature short heater type false twisting machine with a heater temperature of 510 ° C.

7) Polyether compound (P-1) and 1
A cyclic polyorganosiloxane (A-3) in which one dimethylsiloxane unit is cyclically bonded, trimethyloleyl ammonium lauryl sulfonate {ionic surfactant (QS-2)}, and a polyether compound (P -1), 93% by weight of cyclic polyorganosiloxane (A-3), 5% by weight of ionic surfactant (QS)
-2) 2% by weight of a treating agent. The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 8) The treatment agent of the above 7) is made into an aqueous emulsion,
A method in which the aqueous emulsion is applied as a treating agent to the polyester partially drawn yarn so as to be 0.5% by weight, and is subjected to a false twisting step using a high-temperature short heater type false twisting machine with a heater temperature of 510 ° C.

9) Polyether compound (P-1) and 5
Cyclic polyorganosiloxane (B-1) in which one dimethylsiloxane unit and one methyl-γ-trifluoropropylsiloxane unit are cyclically bonded, and di (hydroxyethyl) methyloctylammonium pentadecenylsuccinic acid. Ionic surfactant (QS-3)}, and 97% by weight of polyether compound (P-1);
A treating agent comprising 2% by weight of the cyclic polyorganosiloxane (B-1) and 1% by weight of the ionic surfactant (QS-3). The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 10) The treating agent of the above 9) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent. A method of performing a false twisting process using a false twisting machine.

11) Polyether compound (P-1)
10 dimethylsiloxane units and 1 methyl-γ
A cyclic polyorganosiloxane (B-2) in which trifluoropropylsiloxane units are cyclically bonded, and tributylmethylphosphonium lauryl sulfonate {ionic surfactant (QS-4)}, and a polyether compound (P 1) 93% by weight, a cyclic polyorganosiloxane (B-2) at 4% by weight, and an ionic surfactant (QS-4) at 3% by weight. And make this treatment agent an aqueous emulsion,
A method in which the aqueous emulsion is applied as a treating agent to the polyester partially drawn yarn so as to have a concentration of 0.5% by weight, and the resultant is subjected to a false twisting step using a contact heater type false twisting machine at a heater temperature of 210 ° C. 12) The treating agent of the above 11) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially drawn polyester yarn so as to be 0.5% by weight as a treating agent. A method of performing a false twisting process using a false twisting machine.

13) Polyether compound (P-1)
A linear polyorganosiloxane (C-1) having eight trimethylsilyl groups at both terminals, in which eight dimethylsiloxane units are linearly bonded, and tetrabutylphosphonium oleate {ionic surfactant (QS-5)} Consisting of
And 96% by weight of the polyether compound (P-1), 2% by weight of the linear polyorganosiloxane (C-1), and 2% by weight of the ionic surfactant (QS-5). Treatment agent consisting of The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 14) The treating agent of the above 13) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent. A method of performing a false twisting process using a false twisting machine.

15) Polyether compound (P-1)
A linear polyorganosiloxane (C-2) having ten dimethylsiloxane units linearly having trimethylsilyl groups at both ends, and an ionic surfactant (QS-
1), 93% by weight of the polyether compound (P-1), 5% by weight of the linear polyorganosiloxane (C-2), and 2% by weight of the ionic surfactant (QS-1).
A treating agent containing each in the proportion of This treating agent was made into an aqueous emulsion, and the aqueous emulsion was used as a treating agent in an amount of 0.5% by weight with respect to the polyester partially drawn yarn.
And then subjecting it to a false twisting step using a contact heater type false twisting machine at a heater temperature of 210 ° C. 16) The treating agent of the above 15) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially stretched polyester yarn so as to be 0.5% by weight as a treating agent. A method of performing a false twisting process using a false twisting machine.

17) Polyether compound (P-1)
5 dimethylsiloxane units and 1 methyl γ-
Trifluoropropylsiloxane units linearly bound,
It is composed of a linear polyorganosiloxane (D-1) having a trimethylsilyl group at both terminals and sodium isostearate {ionic surfactant (FN-1)}, and 93% by weight of the polyether compound (P-1). %, 5% by weight of linear polyorganosiloxane (D-1) and 2% by weight of ionic surfactant (FN-1). The treating agent was converted to an aqueous emulsion, and the aqueous emulsion was applied to the polyester partially drawn yarn so as to be 0.5% by weight as a treating agent, and this was applied to a contact heater type false twister having a heater temperature of 210 ° C. Method to be subjected to the false twisting process. 18) The treatment agent of the above 17) is converted into an aqueous emulsion, and the aqueous emulsion is adhered to the polyester partially drawn yarn so as to be 0.5% by weight as a treatment agent. A method of performing a false twisting process using a false twisting machine.

19) The treating agent of the above 2) was converted into an aqueous emulsion, and the aqueous emulsion was adhered to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent. A method of providing a false twisting process using a contact heater type false twisting machine. 20) The treating agent of the above 2) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent, and this is a high-temperature short heater having a heater temperature of 460 ° C. A method of performing a false twisting process using a false twisting machine.

21) The treating agent of the above 3) was converted into an aqueous emulsion, and the aqueous emulsion was adhered to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent. A method of providing a false twisting process using a contact heater type false twisting machine. 22) The treating agent of the above 3) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent, and this is a high-temperature short heater having a heater temperature of 460 ° C. A method of performing a false twisting process using a false twisting machine.

23) Butoxy polyalkylene glycol ether having an average molecular weight of 1000 / butoxy polyalkylene glycol ether having an average molecular weight of 1700 / polyalkylene glycol ether having an average molecular weight of 10,000 = 4
0/40/20 (weight ratio) of the polyether compound (P-
2) a cyclic polyorganosiloxane (A-1), lauryloxypolyethoxy (n = 3) ethyl phosphate / dibutylethanolamine salt {ionic surfactant (PA-1)}, and a polyether 98.5% by weight of the compound (P-2), 0.5% by weight of the cyclic polyorganosiloxane (A-1), and 1% by weight of the ionic surfactant (PA-1). Treatment agent consisting of And make this treatment agent an aqueous emulsion,
A method in which the aqueous emulsion is applied as a treatment agent to a partially drawn yarn of a nylon filament so as to be 0.60% by weight, and is subjected to a false twisting step using a contact heater type false twisting machine at a heater temperature of 210 ° C. 24) The treating agent of the above-mentioned 23) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially drawn yarn of the nylon filament so as to be 0.60% by weight as a treating agent. A method of providing a false twisting step using a heater type false twisting machine.

25) a polyether compound (P-2);
It consists of cyclic polyorganosiloxane (B-1) and ionic surfactant (QS-2), and contains 93% by weight of polyether compound (P-2) and 5% of cyclic polyorganosiloxane (B-1). Wt%, ionic surfactant (QS
-2) 2% by weight of a treating agent. Then, the treating agent was made into an aqueous emulsion, and the aqueous emulsion was attached to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent,
A method of subjecting this to a false twisting step using a contact heater type false twisting machine with a heater temperature of 210 ° C. 26) The treating agent of the above 25) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the partially drawn yarn of the nylon filament so as to be 0.40% by weight as a treating agent, and this is short-circuited at a high temperature of 460 ° C. at a heater temperature of 460 ° C. A method of providing a false twisting step using a heater type false twisting machine.

27) The treating agent of the above 1) was made into an aqueous emulsion, and the aqueous emulsion was adhered to the polyester directly spun drawn yarn so as to have a treating agent content of 0.35% by weight. A method of providing a false twisting process using a contact heater type false twisting machine. 28) The treating agent of the above 1) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the polyester directly spun drawn yarn so as to have a treating agent content of 0.35% by weight. A method of performing a false twisting process using a false twisting machine.

29) The treating agent of the above 2) was made into an aqueous emulsion, and the aqueous emulsion was attached to the polyester directly spun drawn yarn so as to have a treating agent content of 0.35% by weight. A method of providing a false twisting process using a contact heater type false twisting machine. 30) The treating agent of the above 2) is made into an aqueous emulsion, and the aqueous emulsion is adhered to the polyester directly spun drawn yarn so as to have a treating agent content of 0.35% by weight, and this is a high-temperature short heater having a heater temperature of 510 ° C A method of performing a false twisting process using a false twisting machine.

Hereinafter, the structure and effects of the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to the examples. In the following Examples and Comparative Examples, “parts” means “parts by weight” and “%” means “% by weight”.

[0051]

EXAMPLES Test Category 1 (Preparation of Treatment Agent) Preparation of Treatment Agent Butoxypolyalkylene glycol ether グ リ コ ー ル oxyethylene unit / oxypropylene unit = 70/30 (molar ratio), block addition, average molecular weight 1000｝ 48 parts. ,
Polyalkylene glycol ether ｛oxyethylene unit / oxypropylene unit = 20/80 (molar ratio), random addition, average molecular weight 7000７48 parts, and two parts of a cyclic polyorganosiloxane in which six dimethylsiloxane units are cyclically bonded , Tributyl methyl ammonium
Treatment agent by mixing 2 parts of isostearate (Example 1)
Was prepared. Other treating agents were prepared in the same manner as the treating agent (Example 1). These are summarized in Tables 1 and 2.

[0052]

[Table 1]

[0053]

[Table 2]

In Tables 1 and 2, the amount used: parts Polyether compound P-1: butoxypolyalkylene glycol having an average molecular weight of 1000 and being block-added in the ratio of oxyethylene units / oxypropylene units = 70/30 (molar ratio) A mixture of 50 parts of ether and 50 parts of a polyalkylene glycol ether having an average molecular weight of 7000 and randomly added in a ratio of oxyethylene units / oxypropylene units = 20/80 (molar ratio) Polyether compound P-2: oxyethylene units / Oxypropylene units = 40 parts of butoxypolyalkylene glycol ether having an average molecular weight of 1000, which is block-added at a ratio of 70/30 (molar ratio) and oxyethylene units /
40 parts of butoxy polyalkylene glycol ether having an average molecular weight of 1700 randomly added at a ratio of oxypropylene units = 60/40 (molar ratio) and random addition at a ratio of oxyethylene units / oxypropylene units = 25/75 (molar ratio) Of polyorganosiloxanes A-1 to A-3, B-1, B- with 20 parts of a polyalkylene glycol ether having an average molecular weight of 10,000
2, C-1, C-2, D-1, a-1, a-2, b-
1, b-2, cr-1, cr-2, d-1, d-2: The results are shown in Table 3 below. Polyorganosiloxane cr-3: average molecular weight 3000
Linear polydimethylsiloxane polyorganosiloxane cr-4: linear polyorganosiloxane polyorganosiloxane cr-5 in which one methylphenylsiloxane unit and 15 dimethylsiloxane units are linearly bonded: average molecular weight 8600
Wherein the content ratio of the polyoxyalkylene ether block is 92% by weight and the polyoxyalkylene ether block has an oxyethylene unit / oxypropylene unit = 15/15 (mol) ratio. Linear polyether-modified polyorganosiloxane ionic surfactants QS-1 to QS-5 which are randomly added in proportions: These are summarized in Table 4 below. Ionic surfactant FN-1: Isostearate sodium salt Ionic surfactant PA-1: Lauryloxy polyethoxy (n = 3) ethyl phosphate dibutyl ethanolamine salt

[0055]

[Table 3]

In Table 3, DM-1: dimethylsiloxane unit MF-1: methyl.γ-trifluoropropylsiloxane unit TM-1: trimethylsilyl group Viscosity: viscosity at 25 ° C. (numerical value in the table × 10 ⁻⁶ m ²⁾ /
s)

[0057]

[Table 4]

Test Category 2 (Attachment of treating agent to partially drawn polyester filament yarn and its evaluation) Adhesion of treating agent to partially drawn polyester filament yarn Water was added to the treating agent obtained in Test Category 1 to give a treating agent. Concentration 1
A 5% aqueous emulsion was prepared. Then, a polyethylene terephthalate chip having an intrinsic viscosity of 0.64 and a titanium oxide content of 0.6% by weight is dried by a conventional method, spun at 295 ° C. using an extruder, discharged from a die, cooled, and solidified. The aqueous emulsion was adhered to the yarn by a roller lubrication method, wound up at a speed of 3300 m / min without mechanical stretching, and the amount of the treatment agent applied to the yarn was as shown in Tables 5 and 6. A 10 kg wound cake of the partially drawn yarn of 75 denier 72 filaments was obtained.

False twisting by a contact heater type false twister and its evaluation Using the cake obtained above, false twisting was performed under the following false twisting conditions by a contact heater type false twister to evaluate heater contamination. did. The results are shown in Tables 5 and 6. False twisting processing conditions by contact heater type false twisting machine: Processing speed = using contact heater type false twisting machine (SDS1200B manufactured by Ernest Scrug & Sons)
900m / min, stretch ratio = 1.522, twisting method = triaxial disk circumscribed friction method (one guide disk on entry side,
One outgoing guide disk, hard polyurethane disk 7
Sheet), twisting side heater = length 2.5m and surface temperature 210
° C, untwist-side heater = none, target twist number = 3300 T /
Under the conditions of m, false twisting was performed by continuous operation for 25 days. Evaluation of heater contamination: After operating continuously for 25 days under the above conditions, the heater tar on the yarn path on the twisting side heater surface was dropped with a brush, collected and weighed. The results were measured for 10 weights and indicated as an average weight per weight (mg).

False twisting by a high-temperature short-heater type false twister and its evaluation Using the cake obtained above, false twisting was performed by the following high-temperature short-heater type false twister under the following false twisting conditions, resulting in heater contamination. Was evaluated. The results are shown in Tables 5 and 6. False twisting conditions by high-temperature short heater type false twisting machine: High temperature short heater type false twisting machine (No. 33 manufactured by Murata Machinery Co., Ltd.)
J Mach crimper), processing speed = 1000
m / min, stretching ratio = 1.522, twisting method = nip belt friction method, twisting side heater = length 1 m (entrance = 3
(0 cm, outlet 70 cm), surface temperature 510 ° C. at inlet, 410 ° C. at outlet, untwisting heater = none, target twist number = 3
False twisting was performed by continuous operation for 35 days under the condition of 300 T / m. Evaluation of heater contamination: After operating continuously for 35 days under the above conditions, sludge attached to the surface of the ceramic yarn path regulation guide installed in the heater on the twisting side was removed with a brush,
Collected and weighed. And it showed similarly to the case of the contact heater type false twisting machine.

[0061]

[Table 5]

[0062]

[Table 6]

In Tables 5 and 6, the adhesion ratio: the amount of the treatment agent applied to the partially drawn yarn of the polyester filament (%) *: linear polydimethylsiloxane having an average molecular weight of 5000/6 dimethylsiloxane units are cyclically bonded Cyclic polydimethylsiloxane / polyoxyethylene (n =
8) Treatment agent consisting of octyl ether = 100/90/1 (weight ratio) **: Many yarn breaks occurred, and continuous operation was impossible.

Test Category 3 (Adhesion of Treatment Agent to Partially Draw Nylon Filament Yarn and Its Evaluation) Adhesion of Treatment Agent to Partially Draw Nylon Filament Yarn Concentration 1
A 0% aqueous emulsion was prepared. Nylon-6,6 chips having a sulfuric acid relative viscosity (ηr) of 2.4 and a titanium oxide content of 0.3% by weight were dried by a conventional method, spun at 290 ° C. using an extruder, and discharged from a die. Aqueous emulsion is adhered to the running yarn after cooling and solidification by a guide lubrication method, wound up at a speed of 4000 m / min without mechanical stretching, and the amount of the treatment agent adhered to the yarn. 8 kg of a 30 denier 12 filament partially drawn yarn as shown in Table 7 was obtained.

False twisting with a contact heater type false twisting machine and evaluation thereof Using the cake obtained above, false twisting was performed under the same conditions as described in Test Category 2 except for the following conditions. Heater contamination was evaluated in the same manner as described in 2. The results are shown in Table 7. Conditions for false twisting with a contact heater type false twisting machine: stretching ratio = 1.220, twisting method = triaxial disc external friction type friction method (one entrance guide disk, one exit guide disk, one ceramic disk 5) Sheets), target twist number = 300
0 T / m.

False twisting with a high temperature short heater type false twisting machine and its evaluation Using the cake obtained above, false twisting was performed under the same conditions as described in Test Category 2 except for the following conditions. Heater contamination was evaluated in the same manner as described in Category 2. The results are shown in Table 7. False twisting conditions by high-temperature short heater type false twister: processing speed = 1100 m / min, stretching ratio = 1.220, twisting side heater = surface temperature at inlet 460 ° C. and outlet 380
° C, target number of twists = 3000 T / m.

[0067]

[Table 7]

In Table 7, the adhesion ratio is the same as in Tables 5 and 6.

Test Category 4 (Attachment of treating agent to polyester filament direct spun drawn yarn and evaluation thereof) Adhesion of treating agent to polyester filament direct spun drawn yarn Water was added to the treating agent obtained in Test Category 1, Treatment agent concentration is 1
A 0% aqueous emulsion was prepared. The aqueous emulsion is adhered to the running yarn of the polyester filament by the guide lubrication method, taken up by the first godet roller rotating at 4000 m / min, mechanically stretched between the second godet rollers and wound up at 6000 m / min, and treated 5 kg of a directly spun drawn yarn of 50 denier 36 filaments having an adhesion amount of 0.35% with respect to the yarn was obtained.

-False twisting by contact heater type false twister and high temperature short heater type false twister and evaluation thereof Using the cake obtained above, the overfeed rate was 3%, and the false twisting speed was 700 m / min. Except for this, perform false twisting under the same conditions as in Test Category 2.
Heater contamination was evaluated in the same manner as described above. The results are shown in Table 8.

[0071]

[Table 8]

[0072]

As is clear from the above description, the treatment agent and the treatment method of the present invention described above include a method for treating a synthetic fiber, even if it is a false twisting step involving severe heat treatment.
There is an effect that heater contamination can be sufficiently prevented.

Claims (10)

[Claims] 1. A synthetic fiber treating agent comprising a polyether compound, the following polyorganosiloxane, and an ionic surfactant, wherein the polyorganosiloxane is contained in an amount of 0.1 to 12% by weight in the synthetic fiber treating agent. % Of the ionic surfactant and 0.1 to 12% by weight of the ionic surfactant. Polyorganosiloxane: The following polyorganosiloxane A, the following polyorganosiloxane B, the following polyorganosiloxane C, and the following polyorganosiloxane D
One or two or more polyorganosiloxanes selected from: polyorganosiloxane A: a cyclic polyorganosiloxane in which 4 to 12 siloxane units represented by the following formula 1 are bonded in a cyclic manner; polyorganosiloxane B: a compound represented by the following formula 1 A cyclic polyorganosiloxane in which 4 to 12 siloxane units represented by the following formula 2 and a siloxane unit represented by the following formula 2 are bonded in a cyclic manner, and 25 mol of the siloxane unit represented by the following formula 2 is contained in all siloxane units. % Of a cyclic polyorganosiloxane having a ratio of not more than 1%. Polyorganosiloxane C: a linear polyorganosiloxane in which 4 to 12 siloxane units represented by the following formula 1 are bonded in a linear manner: polyorganosiloxane D: represented by the following formula 1 4 to 12 siloxane units represented by the following formula 2 A linear polyorganosiloxane bonded in a linear manner, the linear polyorganosiloxane having a siloxane unit represented by the following formula 2 in a proportion of 25 mol% or less in all siloxane units: (Equation 2) (In the formulas 1 and 2, R ¹ and R ^{2 are the} same or different alkyl groups having 1 to 4 carbon atoms R ³ : a fluoroalkyl group having 1 to 4 carbon atoms or a phenyl group R ⁴ : a C 1 to ⁴ carbon atom Fluoroalkyl group or carbon number 1
4 alkyl groups) 2. The synthetic fiber treating agent according to claim 1, wherein the siloxane unit represented by the formula 1 is a dimethylsiloxane unit. 3. The synthetic fiber treating agent according to claim 1, wherein the polyorganosiloxane is one or more cyclic polyorganosiloxanes selected from polyorganosiloxane A and polyorganosiloxane B. 4. The polyorganosiloxane is one or more linear polyorganosiloxanes selected from polyorganosiloxane C and polyorganosiloxane D, and has, as a terminal group, an alkyl group having 1 to 4 carbon atoms. 3. The synthetic fiber treating agent according to claim 1, which is a linear polyorganosiloxane having a trialkylsilyl group. 5. The synthetic fiber treating agent according to claim 1, wherein the ionic surfactant is a quaternary onium salt represented by the following formula 3. (Equation 3) (In the formula 3, Y: N or PR ⁵ , R ⁶ , R ⁷ , R ⁸ : the same or different carbon number 1 to 1)
25 alkyl group, hydroxyalkyl group having 1 to 6 alkenyl group carbon atoms or 2 to 25 carbon atoms A ^n-: phosphoric acid esters having 1 to 30 carbon atoms, 1 to 3 carbon atoms
N-valent anionic group obtained by removing hydrogen ions from an organic acid selected from a sulfuric acid ester having 0, a sulfonic acid ester having 1 to 30 carbon atoms, and a carboxylic acid having 1 to 30 carbon atoms; 6. A in a quaternary onium salt of the formula 3
^n- is an aliphatic phosphate having 1 to 26 carbon atoms, an aliphatic sulfonic acid ester having 1 to 26 carbon atoms, and 1 to 2 carbon atoms.
The synthetic fiber treating agent according to claim 5, which is an n-valent anionic group obtained by removing hydrogen ions from an organic acid selected from aliphatic carboxylic acids of item 6. 7. The polyether compound having an average molecular weight of 700 to 20,000 containing oxyethylene units and oxypropylene units as main constituent units.
7. The synthetic fiber treating agent according to 3, 4, 5 or 6. 8. The synthetic fiber treating agent according to claim 1, 2, 3, 4, 5, 6, or 7 attached to a synthetic fiber filament yarn to be subjected to a heat treatment step so as to be 0.1 to 3% by weight. A method for treating synthetic fiber, comprising: 9. The method according to claim 8, wherein the heat treatment step is a false twisting step. 10. The false twisting step is performed at a heater temperature of 300 to 60.
The synthetic fiber treatment method according to claim 9, which is a step of 0 ° C.