JP2017160547A - Treatment agent for synthetic fiber and application thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment agent for synthetic fiber excellent in package appearance and unwindability and a synthetic fiber filament yarn using the same and a manufacturing method of the synthetic fiber.SOLUTION: There is provided a treatment agent for synthetic fiber containing polyoxyalkylene alkyl ether represented by the general formula (1), where kinetic viscosity at 25°C of a solution with concentration of a nonvolatile content of the treatment agent of 10 wt.% of 2.0 to 3.0 mm/s. RO-[(PO)a/(EO)b]-H (1), where Rrepresents a branched alkyl group having 14 to 15 carbon atoms, PO represents an oxypropylene group and EO represents an oxyethylene group, a and b each represents average addition molar number, a=1 to 100 and b=1 to 100, and [(PO)a/(EO)b] is a polyoxyalkylene group by random addition of a molar of PO and b molar of EO.SELECTED DRAWING: None

Description

  The present invention relates to a treating agent for synthetic fibers and its use. More specifically, the present invention relates to a synthetic fiber treating agent having a good package appearance (winding shape) and therefore excellent fiber unwinding properties, a synthetic fiber filament yarn using the same, and a method for producing a false twisted yarn. is there.

In recent years, the production of synthetic fibers has become even faster, while the production of new forms of synthetic fibers, such as synthetic fibers with low denier, synthetic fibers with high multiplicity, and synthetic fibers with a modified cross-section, has increased. It is in.
In general, the treating agent for synthetic fibers is mainly composed of a smoothing agent and is composed of an emulsifier, an antistatic agent, and the like. Conventional processing agents for synthetic fibers have been devised particularly as emulsifiers and antistatic agents, and can suppress heater contamination, fluff breakage, and generation of static electricity to some extent (Patent Documents 1 and 2).
However, the synthetic fiber provided with the conventional treating agent for synthetic fiber has a problem that the wound yarn slips and falls when the yarn is wound around the cheese-like package in the final step of the synthetic fiber manufacturing process. The package appearance tended to deteriorate due to the increase in size.
Moreover, when a package having a poor appearance is unwound and supplied to a higher-order process, the unwinding is not smooth, and the frequency of yarn breakage tends to increase. Further, when unwinding a package that has been tightly tightened due to the influence of the fiber treatment agent, it has caused a single turn or a thread breakage.
Thus, none of the conventional synthetic fiber treating agents are excellent in package appearance and unwinding property at the same time.

JP 2006-70420 A JP 2009-13553 A

  The objective of this invention is providing the processing agent for synthetic fibers excellent in package external appearance and unwinding property. Moreover, it is providing the manufacturing method of a synthetic fiber filament yarn and synthetic fiber using the same.

As a result of intensive studies, the present inventors have found that the above-mentioned problems can be solved if the treatment agent for synthetic fibers contains a specific polyoxyalkylene alkyl ether (A) and exhibits a specific kinematic viscosity. The invention has been reached.
That is, the treating agent for synthetic fibers of the present invention is a treating agent for synthetic fibers containing a polyoxyalkylene alkyl ether (A) represented by the following general formula (1), and the concentration of the non-volatile content of the treating agent is 10 The processing agent for synthetic fibers whose kinematic viscosity in 25 degreeC of the aqueous solution which is weight% is 2.0-3.0 mm < ² > / s.
^{R 1 O - [(PO)} a / (EO) b] -H (1)
(Wherein R ¹ represents a branched alkyl group having 14 or 15 carbon atoms, PO represents an oxypropylene group, EO represents an oxyethylene group, a and b represent the average number of moles added, and a = 1 to 100, b = 1 to 100. [(PO) a / (EO) b] is a polyoxyalkylene group formed by randomly adding a mole of PO and b mole of EO.)

It is preferable to further contain a polyether (B) represented by the following general formula (2).
^{R 2 O - [(PO)} c / (EO) d] -H (2)
(However, R ² represents a hydrogen atom or a linear or branched alkyl group having 1 to 13 or 16 to 24 carbon atoms. PO represents an oxypropylene group, EO represents an oxyethylene group. The average number of moles added is c = 1 to 100 and d = 1 to 100. [(PO) c / (EO) d] is formed by randomly adding c mole PO and d mole EO. It is a polyoxyalkylene group.)

The molecular weight calculated from the gel permeation chromatography (GPC) measurement of the polyoxyalkylene alkyl ether (A) and the polyether (B) is preferably 200 to 12,000.
It is preferable that the total weight proportion of the polyoxyalkylene alkyl ether (A) and the polyether (B) in the nonvolatile content of the treating agent is 3 to 99% by weight.
It is preferable to further include at least one selected from an anionic surfactant containing a P atom and an anionic surfactant containing an S atom.
It is preferable to further contain a modified silicone.
It is preferable for friction false twisting.

  The synthetic fiber filament yarn of the present invention is formed by adhering the above-mentioned synthetic fiber treating agent to the (raw material) synthetic fiber filament yarn.

  The manufacturing method of the false twisted yarn of the present invention includes the steps of heating, stretching, and false twisting the synthetic fiber filament yarn.

  Since the treatment agent for synthetic fibers of the present invention is excellent in package appearance and unwinding property, the synthetic fiber filament yarn provided with the treatment agent is excellent in package appearance and unwinding property. The manufacturing method of the false twisted yarn of the present invention uses the synthetic fiber filament yarn, and thus is excellent in package appearance and unwinding property.

  The synthetic fiber treating agent of the present invention will be described in detail below.

[Treatment agent for synthetic fibers]
The treating agent for synthetic fibers of the present invention contains the polyoxyalkylene alkyl ether (A) represented by the general formula (1), and the kinematic viscosity of a 10% strength aqueous solution at 25 ° C. is 2.0 to 3.0 mm ² / s.

  In general, a processing agent for synthetic fibers is usually applied in a spinning process or drawing process of synthetic fiber filaments, and a processing agent consisting of only non-volatile components and non-volatile components are applied to synthetic fiber filaments that are spun at high speed (raw material). A method of oiling (oiling) a treatment agent diluted with a low-viscosity mineral oil or an aqueous treatment agent obtained by emulsifying a non-volatile component in water with a roller or a nozzle is employed.

When the treatment agent for synthetic fibers of the present invention is used, the reason why the package appearance and the unraveling property, which are the problems of the present application, are not clear, but is estimated as follows.
Since the treatment agent for synthetic fibers of the present invention has a low kinematic viscosity of the aqueous solution, regardless of the material of the rollers and guides related to roller oiling and nozzle oiling, the aqueous solution is likely to smoothly move to the yarn that runs at high speed, and The aqueous solution penetrates evenly into the side that is not in contact with the roller or nozzle. In this way, the treatment agent quickly and uniformly adheres to the fiber, so that it has excellent process passability in the fiber manufacturing process and does not cause slight disturbance of the yarn in the winding process on the package.

The treatment agent for synthetic fibers of the present invention has a kinematic viscosity at 25 ° C. of 2.0 to 3.0 mm ² / s in an aqueous solution having a nonvolatile content of 10% by weight of the treatment agent, and is 2.0 to ² 0.9 mm ² / s is preferable, 2.0 to 2.8 mm ² / s is more preferable, 2.1 to 2.7 mm ² / s is further preferable, and 2.1 to 2.6 mm ² / s is particularly preferable. If it is less than 2.0 mm < ² > / s, the viscosity of a processing agent will become low too much and scattering of a processing agent will generate | occur | produce in an oil supply process. On the other hand, if it exceeds 3.0 mm ² / s, the package appearance deteriorates because it does not adhere quickly and uniformly on the fiber.

The aqueous solution having a non-volatile content of 10% by weight of the treatment agent means an aqueous solution in which 90 parts by weight of ion exchange water and 10 parts by weight of the non-volatile content of the treatment agent are dissolved or emulsified. The appearance is often transparent, but it may be translucent.
The non-volatile content in the present invention refers to an absolutely dry component when the treatment agent is heat treated at 105 ° C. to remove volatile components such as a solvent and reach a constant weight.
For the measurement of kinematic viscosity, about 10 g of a sample is put into a Canon Fenceke viscometer, and kept in a thermostatic chamber adjusted to 25 ° C. for 15 minutes. Thereafter, the outflow time (seconds) for the sample to pass between the marked lines of the viscometer was measured, and the value multiplied by the viscometer coefficient was taken as the kinematic viscosity.

  The pH of the 10% concentration of the treatment agent of the present invention is preferably 5.5 to 8.0, more preferably 6.0 to 7.8, and even more preferably 6.2 to 7.5. If it is less than 5.5 or more than 8.0, the treatment agent may be decomposed.

  The transmittance of the 10% strength aqueous solution of the treatment agent of the present invention is preferably 95% or more, more preferably 97% or more, and still more preferably 98% or more. A preferred upper limit is 100%. If it is less than 95%, the stability of the aqueous solution is poor, and the aqueous solution may be separated during storage, so that it does not adhere uniformly, and the effects of the present application may not be obtained.

The treatment agent for synthetic fibers of the present invention essentially contains a polyoxyalkylene alkyl ether (A) represented by the general formula (1) described later.
The weight percentage of the polyoxyalkylene alkyl ether (A) in the non-volatile content of the treating agent is preferably 2 to 98% by weight, more preferably 10 to 80% by weight, still more preferably 15 to 70% by weight, ˜60% by weight is most preferred. If it is less than 2% by weight, the kinematic viscosity of the aqueous solution does not decrease, so the package appearance and unraveling properties may not be improved. May be connected.

The lower limit of the total weight ratio of the polyoxyalkylene alkyl ether (A) described later and the polyether (B) described later in the nonvolatile content of the treating agent is preferably 3% by weight, more preferably 20% by weight, % By weight is more preferred and 70% by weight is particularly preferred. If it is less than 3% by weight, the fiber-to-fiber friction is increased, and the package appearance and unwinding property may not be improved.
The upper limit of the total weight ratio of the polyoxyalkylene alkyl ether (A) described later and the polyether (B) described later in the nonvolatile content of the treatment agent is preferably 100% by weight, more preferably 99% by weight or less, It is more preferably 97% by weight or less, particularly preferably 95% by weight or less, and most preferably 90% by weight or less.

(Polyoxyalkylene alkyl ether (A))
The polyoxyalkylene alkyl ether (A) (hereinafter referred to as alkyl ether (A)) is an essential component in the present invention. The structure of the alkyl ether (A) is represented by the general formula (1).

In general formula (1), R ¹ represents a branched alkyl group having 14 or 15 carbon atoms. The effect of the present application cannot be obtained with 13 or less and 16 or more branched alkyl groups or 14 or 15 linear alkyl groups because the appropriate kinematic viscosity of the treating agent cannot be obtained.

  a shows the average addition mole number of a polyoxypropylene group, is 1-100, 3-80 are preferable, 5-60 are more preferable, 8-40 are more preferable, 10-30 are especially preferable. If it is less than 1, the melting point increases, so the handleability is poor. On the other hand, if it exceeds 100, the friction of the fiber treatment agent increases, the process passability decreases, and the package appearance becomes poor.

  b shows the average addition mole number of a polyoxyethylene group, is 1-100, 5-80 are preferable, 10-60 are more preferable, 15-40 are more preferable, 20-30 are especially preferable. If it is less than 1, the hydrophilicity decreases and the emulsifying power deteriorates, so the stability of the aqueous solution of the synthetic fiber treating agent is poor. On the other hand, if it exceeds 100, the friction of the fiber treatment agent increases, the process passability decreases, and the package appearance becomes poor.

  [(PO) a / (EO) b] represents a polyoxyalkylene group formed by random addition of a mole of PO and b mole of EO, and is a concept including the following aspects.

(Aspect 1)
First, only b1 mol of EO is added, and then a mol of PO and (b-b1) mol of EO ratio are added at a constant ratio.
(Aspect 2)
First, b1 mol of EO alone is added, and then added while changing the ratio of a mol of PO and (b-b1) mol of EO under the following condition 1.
(Aspect 3)
First, b1 mol of EO alone is added, and then added while changing the ratio of a mol of PO and (b-b1) mol of EO under the following condition 2.
b1 is preferably 1 to 10, more preferably 1 to 6, and still more preferably 2 to 4. If it exceeds 10, the EO ratio decreases and the effect of the present application may not be obtained due to an increase in the kinematic viscosity of the aqueous solution.

(Aspect 4)
First, a1 mol of PO alone is added, and then (a-a1) mol of PO and b mol of EO are added at a constant ratio.
(Aspect 5)
First, only a1 mol of PO is added, and (a-a1) mol PO and b mol EO ratio are added while changing under the following condition 1.
(Aspect 6)
First, a1 mol of PO alone is added, and (a-a1) mol PO and b mol EO ratio are added while changing under the following condition 2.
a1 is preferably 1 to 10, more preferably 1 to 6, and still more preferably 2 to 4. If it exceeds 10, the PO ratio increases and the stability of the aqueous solution is inferior, so the effect of the present application may not be obtained.

(Aspect 7)
A mole of PO and b mole of EO ratio are added at a constant ratio.
(Aspect 8)
The a mole of PO and the b mole of EO are added under the following condition 1.
(Aspect 9)
The a mole of PO and b mole of EO are added under the following condition 2 while changing.

However, the following aspect 10 is not included in [(PO) a / (EO) b] of the present invention.
(Aspect 10)
(1) First, only b 'mol of EO is added. (2) A ″ mole PO and b ″ mole EO ratio are added at a constant ratio. (3) Add b '''moles of EO only.

Condition 1
The start of supply of ethylene oxide and propylene oxide is T0, the end of supply of ethylene oxide and propylene oxide is T100, and the times T1 and T2 between T0 and T100 are T0 <T1 <T2 <T100 and (T2-T1 ) /T100=0.01
The weight ratio of ethylene oxide to propylene oxide supplied at each time point of T0, T100, T1, and T2 is set to [PO / EO] T0, [PO / EO] T100, [PO / EO] T1 and [PO / EO] A method for producing an alkylene oxide adduct that simultaneously satisfies the following formulas (B) to (D) as T2.
0 <[PO / EO] T0 <1 (B)
1 <[PO / EO] T100 <100 (C)
0.8 <[PO / EO] T2 / [PO / EO] T1 <10 (D)

Condition 2
The start of supply of ethylene oxide and propylene oxide is T0, the end of supply of ethylene oxide and propylene oxide is T100, and the times T1 and T2 between T0 and T100 are T0 <T1 <T2 <T100 and (T2-T1 ) /T100=0.01
The weight ratio of ethylene oxide to propylene oxide supplied at each time point of T0, T100, T1, and T2 is set to [EO / PO] T0, [EO / PO] T100, [EO / PO] T1, and [EO / PO] A method for producing an alkylene oxide adduct that simultaneously satisfies the following formulas (B) ′ to (D) ′ as T2.
0 <[EO / PO] T0 <1 (B) ′
1 <[EO / PO] T100 <100 (C) ′
0.8 <[EO / PO] T2 / [EO / PO] T1 <10 (D) ′

  In Embodiments 1 to 3, since only EO is added first, compared with Embodiments 4 to 6, by adding EO which is a hydrophilic group directly to the alkyl group, the hydrophilicity is increased. The aqueous solution stability of the treatment agent is excellent. Therefore, the effect of the present invention is easily exhibited by the treatment agent uniformly adhering to the fibers.

  In aspects 4 to 6, since only PO is first added, compared to aspects 1 to 3, by adding PO which is a hydrophobic group directly to the alkyl group, the wettability is improved, so that it is uniform. It is easy to adhere to.

  In the aspect 7, since PO and EO can be set at an arbitrary ratio, it is relatively easy to control physical properties such as the melting point, cloud point, molecular weight, and viscosity of the alkyl ether (A). Moreover, since the ratio of PO and EO during synthesis is always constant, the time required for synthesis can be shortened.

  In Aspect 2, Aspect 5 and Aspect 8, since the PO ratio increases toward the terminal hydroxyl group side of alkyl ether (A), friction between fibers is increased, and the package appearance is improved.

  In Aspect 3, Aspect 6, and Aspect 9, since the EO ratio increases toward the terminal hydroxyl group side of alkyl ether (A), the fiber-to-metal friction is reduced, leading to a reduction in fluff and yarn breakage.

  In aspect 10, the appearance of the package is hardly improved because the random body is sealed with hydrophilic EO and hydrophilic EO, or because the surface tension is high and the kinematic viscosity of the aqueous solution is also increased.

Based on the charts obtained by measuring the ¹³ C-NMR spectrum and ¹ H-NMR spectrum of the alkyl ether (A), N _PO-PO , N _PO2 , N _EO-R , N _R , and N _EO defined below respectively. Read _-OH , _NPO-OH , _N1OH and _N2OH ,
N _PO-PO : Sum of integral values of ¹³ C-NMR spectrum attributed to primary carbon of PO-PO bonded PO N _PO2 : Integrated value of ¹³ C-NMR spectrum attributed to secondary carbon of PO Sum N _EO-R : Sum of integral values of ¹³ C-NMR spectrum attributed to carbon of EO directly ether-bonded to R group N _R : Integral of ¹³ C-NMR spectrum attributed to α-position carbon of R group Sum of values N _EO-OH : Sum of integral values of ¹³ C-NMR spectrum attributed to carbon of EO directly bonded to terminal hydroxyl group N _PO-OH : To carbon of PO directly bonded to terminal hydroxyl group sum _{N 1 OH} of the integrated value of the ¹³ C-NMR spectrum attributed: primary sum _{N 2OH} of ¹ H-NMR integral value of the spectrum attributable to protons bound methylene group of the hydroxyl group: coupling a secondary hydroxyl group Of integrated values of ¹ H-NMR spectrum assigned to proton of methine group

Then, the obtained reading values are respectively calculated by the following calculation formulas (I) to (IV):
Er (%) = 100 * _NPO-PO / ( _NPO-PO + _NPO2 ) (I)
E _EO-R (%) = 100 × N _EO-R / N _R (II)
E _EO-OH (%) = 100 × N _EO-OH / (N _EO-OH + N _PO—OH ) (III)
_{E OH (%) = 100 ×} N 2OH / (N 1OH + N 2OH) (IV)
Randomization index Er obtained by substituting for _R , percentage E _{EO-R of} the oxyethylene group directly connected to the _R group, percentage E _EO-OH of the oxyethylene group directly connected to the terminal hydroxyl group, and 2 of the terminal hydroxyl group the parameters of the quaternization rate E _OH, each aspect of the polyoxyalkylene alkyl ether (a) is preferable to satisfy each of the following.

(Aspect 1)
1 ≦ Er ≦ 45, E _EO-R = 100, 26 ≦ E _EO-OH ≦ 74 and 26 ≦ E _OH ≦ 74 are preferred, 10 ≦ Er ≦ 35, E _EO-R = 100, 40 ≦ E _EO-OH More preferably, ≦ 70 and 38 ≦ E _OH ≦ 70.
(Aspect 2)
_{1 ≦ Er ≦ 45, E EO} -R = 100,1 ≦ E EO-OH ≦ 49 and 51 ≦ _{E OH} ≦ 99 _{preferably, 10 ≦ Er ≦ 35, E} EO-R = 100,10 ≦ E EO-OH More preferably, ≦ 40 and 65 ≦ E _OH ≦ 95.
(Aspect 3)
_{1 ≦ Er ≦ 45, E EO} -R = 100,51 ≦ E EO-OH ≦ 99 and 1 ≦ _{E OH} ≦ 49 _{preferably, 10 ≦ Er ≦ 35, E} EO-R = 100,65 ≦ E EO-OH More preferably, ≦ 95 and 10 ≦ E _OH ≦ 40.
(Aspect 4)
1 ≦ Er ≦ 45, E _EO-R = 0, 26 ≦ E _EO-OH ≦ 74 and 26 ≦ E _OH ≦ 74 are preferred, 10 ≦ Er ≦ 35, E _EO-R = 0, 40 ≦ E _EO-OH More preferably, ≦ 70 and 38 ≦ E _OH ≦ 70.
(Aspect 5)
1 ≦ Er ≦ 45, E _EO-R = 0, 1 ≦ E _EO-OH ≦ 49 and 51 ≦ E _OH ≦ 99 are preferred, 10 ≦ Er ≦ 35, E _EO-R = 0, 10 ≦ E _EO-OH More preferably, ≦ 40 and 65 ≦ E _OH ≦ 95.
(Aspect 6)
1 ≦ Er ≦ 45, E _EO-R = 0, 51 ≦ E _EO-OH ≦ 99 and 1 ≦ E _OH ≦ 49 are preferred, 10 ≦ Er ≦ 35, E _EO-R = 0, 65 ≦ E _EO-OH More preferably, ≦ 95 and 10 ≦ E _OH ≦ 40.
(Aspect 7)
Preferably _{1 ≦ Er ≦ 45,26 ≦ E EO} -R ≦ 74,26 ≦ E EO-OH ≦ 74 and _{26 ≦ E OH ≦ 74, 10} ≦ Er ≦ 35,38 ≦ E EO-R ≦ 50,40 ≦ More preferably, E _EO-OH ≦ 70 and 38 ≦ E _OH ≦ 70.
(Aspect 8)
1 ≦ Er ≦ 45, 51 ≦ E _EO-R ≦ 99, 1 ≦ E _EO-OH ≦ 49 and 51 ≦ E _OH ≦ 99 are preferable, 10 ≦ Er ≦ 35, 65 ≦ E _EO-R ≦ 95, 10 ≦ More preferably, E _EO-OH ≦ 40 and 65 ≦ E _OH ≦ 95.
(Aspect 9)
Preferably _{1 ≦ Er ≦ 45,1 ≦ E EO} -R ≦ 49,51 ≦ E EO-OH ≦ 99 and _{1 ≦ E OH ≦ 49, 10} ≦ Er ≦ 35,10 ≦ E EO-R ≦ 35,65 ≦ More preferably, E _EO-OH ≦ 95 and 10 ≦ E _OH ≦ 40.

The weight average molecular weight of the alkyl ether (A) is 200 to 12000, preferably 500 to 5000, and particularly preferably 1000 to 3000. When the weight average molecular weight is less than 200, when heat-treated in the false twisting process, smoke is generated due to the low molecular weight, which may cause heater contamination. When the weight average molecular weight is more than 12,000, the coefficient of dynamic friction increases when the treatment agent is attached to the synthetic fiber due to an increase in the viscosity due to the high molecular weight, and the package appearance may be insufficient.
The weight average molecular weight was injected into separation columns KF-402HQ and KF-403HQ manufactured by Showa Denko KK at a sample concentration of 3 mg / cc using a high-speed gel permeation chromatography apparatus HLC-8220GPC manufactured by Tosoh Corporation. The maximum peak value measured by the RI detector.

[Production method of alkyl ether (A)]
There is no limitation in particular as a manufacturing method of alkyl ether (A), A well-known method is employable. For example, the method for producing the polyoxyalkylene alkyl ether of the present invention has the following general formula (A):
R ³ OH (A)
(In the formula, R ³ represents a branched alkyl group having 14 or 15 carbon atoms.)
Is produced as follows according to the above (Aspect 1) to (Aspect 9).

(Aspect 1)
A step (hereinafter referred to as the first stage) of supplying only 1 mole of ethylene oxide to carry out an addition reaction, and a mole of propylene oxide and (b-b1) mole of ethylene oxide are fed after the first stage to cause a random addition reaction. The step (hereinafter referred to as the second step) may be carried out continuously up to the first and second steps, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 2)
A step (1st stage) of supplying ethylene oxide only by b1 mole and an addition reaction, and after the first stage, a mole of propylene oxide and (b-b1) mole of propylene oxide are fed in accordance with Condition 1, and a random addition reaction The step (second stage) may be performed continuously up to the first stage and the second stage, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 3)
A step of supplying an ethylene oxide only by b1 mol (1st stage) and an addition reaction after the first stage by supplying a mol of propylene oxide and (b-b1) mol of ethylene oxide in accordance with condition 2 The step (second stage) may be performed continuously up to the first stage and the second stage, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 4)
A step of supplying only 1 mol of propylene oxide to cause an addition reaction (first stage), and a step of supplying a random addition reaction by supplying (a-a1) mol of propylene oxide and b mol of ethylene oxide after the first stage (2) Stage 1) may be carried out continuously up to the 1st stage and 2nd stage, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 5)
A step of supplying only 1 mol of propylene oxide to carry out an addition reaction (first stage), and after the first stage, supplying (a-a1) mol of propylene oxide and b mol of ethylene oxide according to Condition 1, random addition reaction The step (second stage) may be performed continuously up to the first stage and the second stage, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 6)
A step of supplying only 1 mol of propylene oxide to carry out an addition reaction (first stage), and after the first stage, supplying (a-a1) mol of propylene oxide and b mol of ethylene oxide according to condition 2, random addition reaction The step (second stage) may be performed continuously up to the first stage and the second stage, or the adduct obtained in each step may be collected once and the reaction may be continued.
(Aspect 7)
A step of supplying a mole of propylene oxide and b mole of ethylene oxide at a constant ratio to cause random addition reaction.
(Aspect 8)
A step of supplying a mole of propylene oxide and b mole of ethylene oxide in accordance with Condition 1 to cause a random addition reaction.
(Aspect 9)
A step of supplying a mole of propylene oxide and b mole of ethylene oxide in accordance with condition 2 to cause random addition reaction.

Examples of the method for producing the alkyl ether (A) include the following.
Stirring and temperature adjustment are possible, and an alcohol with 14 or 15 carbon atoms is added together with an alkali catalyst (eg caustic potash or caustic soda) into an autoclave equipped with an alkylene oxide charge tank, nitrogen supply pipe, and pressure control valve. After the inside of the mixed system is replaced with nitrogen, dehydration is performed at 80 to 130 ° C. for 1 to 3 hours. Next, an alkylene oxide (AO) such as ethylene oxide (EO) or propylene oxide (PO) is added at a gauge pressure of 0.1 to 0.4 MPa and a reaction temperature of 80 to 180 so as to achieve the above (Aspect 1) to (Aspect 9). The addition polymerization reaction is carried out at a temperature of ° C. The resulting alkyl ether is then recovered. In this way, the alkyl ether (A) can be synthesized. In order to increase the weight average molecular weight of the alkyl ether, the same process as described above may be repeated 2 to 5 times using the recovered alkyl ether in place of the branched alcohol having 14 or 15 carbon atoms. Good.

[Polyether (B)]
The polyether (B) is represented by the general formula (2). When the polyether (B) is used in combination with the polyoxyalkylene alkyl ether (A) described above, the distribution of the alkyl group is generated to improve the compatibility of the treatment agent, thereby obtaining the effect of the present invention. It is a component that becomes easy.

In general formula (2), R ² represents a hydrogen atom or a linear or branched alkyl group having 1 to 13 carbon atoms. PO represents an oxypropylene group, and EO represents an oxyethylene group. c and d represent the average number of moles added, and c = 1 to 100 and d = 1 to 100. [(PO) c / (EO) d] is a polyoxyalkylene group formed by randomly adding c mol PO and d mol EO. )

  c shows the average addition mole number of a polyoxypropylene group, is 1-100, 3-80 are preferable, 5-60 are more preferable, 8-40 are more preferable, 10-30 are especially preferable. If it is less than 1, the melting point increases, so the handleability is poor. On the other hand, if it exceeds 100, the friction of the fiber treatment agent increases, the process passability decreases, and the package appearance becomes poor.

  d shows the average addition mole number of a polyoxyethylene group, is 1-100, 5-80 are preferable, 10-60 are more preferable, 15-40 are more preferable, 20-30 are especially preferable. If it is less than 1, the hydrophilicity decreases and the emulsifying power deteriorates, so the stability of the aqueous solution of the synthetic fiber treating agent is poor. On the other hand, if it exceeds 100, the friction of the fiber treatment agent increases, the process passability decreases, and the package appearance becomes poor.

[Method for Producing Polyether (B)]
There is no limitation in particular as a manufacturing method of polyether (B), A well-known method is employable.

As a manufacturing method of polyether (B), the following is mentioned, for example.
Stirring and temperature control are possible, and the starting material alcohol (monohydric alcohol and / or dihydric alcohol) is converted into an alkali catalyst (for example, caustic potash or caustic soda) in an autoclave equipped with an alkylene oxide charge tank, nitrogen supply pipe and pressure control valve. ) And the inside of the mixed system is purged with nitrogen, followed by dehydration at 80 to 130 ° C. for 1 to 3 hours. Then, alkylene oxide (AO) such as ethylene oxide (EO) and propylene oxide (PO) is added at a gauge pressure of 0.1 to 0.4 MPa and a reaction temperature of 80 to 180 ° C. so that a desired ratio is obtained (EO). When PO is added at the same time, random type), an addition polymerization reaction is performed. Thereafter, the obtained polyether compound is recovered. In this way, the polyether compound (B) can be synthesized. In addition, in order to enlarge the weight average molecular weight of a polyether compound, you may repeat the same process as the above 2-5 times using the polyether compound collect | recovered instead of starting material alcohol.

  Examples of the monohydric alcohol include aliphatic monohydric alcohols. Aliphatic monohydric alcohols are preferred from the viewpoints of cost, reactivity, and smoothness as a treating agent for synthetic fibers. The monohydric alcohol is preferably a primary alcohol or a secondary alcohol, more preferably a primary alcohol. Moreover, the hydrocarbon group which is a residue obtained by removing a hydroxyl group from a monohydric alcohol may be linear or branched, and may be saturated or unsaturated. The number of carbon atoms of the monohydric alcohol is preferably 4 to 24 (excluding 14 and 15 branched alcohols), and more preferably 8 to 22 from the viewpoint of product stability during low-temperature storage of the fiber treatment agent ( However, 14 and 15 branched alcohols are excluded.) And 8-18 are more preferable (however, 14 and 15 branched alcohols are excluded).

Examples of monohydric alcohols include butanol, pentyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, undecyl alcohol, dodecyl alcohol, tridecyl alcohol, cetyl alcohol, stearyl alcohol, and nonadecyl alcohol. Saturated aliphatic alcohols: butenyl alcohol, pentenyl alcohol, octenyl alcohol, decenyl alcohol, dodecenyl alcohol, tridecenyl alcohol, pentadecenyl alcohol, oleyl alcohol, gadryl alcohol, linoleyl alcohol, etc. Of unsaturated aliphatic alcohols; methyl cyclohexyl alcohol, ethyl cyclohexyl alcohol, propyl cyclohexyl alcohol, octyl cyclo Hexyl alcohol, nonyl cyclohexyl alcohol, cyclic aliphatic alcohols, such as adamantyl alcohol; and the like.
Among these, butanol, octyl alcohol, nonyl alcohol, decyl alcohol, dodecyl alcohol, tridecyl alcohol, cetyl alcohol, stearyl alcohol, nonadecyl alcohol, and oleyl alcohol are preferable, butanol, octyl alcohol, decyl alcohol, dodecyl alcohol, More preferred are tridecyl alcohol, tetradecyl alcohol, cetyl alcohol, stearyl alcohol, and oleyl alcohol.

  Examples of the dihydric alcohol include alkylene glycols having 2 to 9 carbon atoms such as ethylene glycol, propylene glycol, butylene glycol, and nonanediol; polyalkylene glycols such as diethylene glycol, triethylene glycol, dipropylene glycol, and tripropylene glycol. Can be mentioned. Among these, diethylene glycol and triethylene glycol are preferable from the viewpoint of ease of reaction and cost for producing the polyether compound (B).

  The weight average molecular weight of the polyether (B) is 200 to 12000, preferably 500 to 5000, and particularly preferably 1000 to 3000. When the weight average molecular weight is less than 200, when heat-treated in the false twisting process, smoke is generated due to the low molecular weight, which may cause heater contamination. When the weight average molecular weight is more than 12000, when the treatment agent is attached to the synthetic fiber due to the increase in viscosity due to the high molecular weight, the dynamic friction coefficient may be increased and the package appearance may be poor.

(Anionic surfactant containing P atom, anionic surfactant containing S atom)
When the treatment agent of the present invention further contains at least one selected from an anionic surfactant containing P atoms and an anionic surfactant containing S atoms, the package appearance and the unwinding property are excellent due to excellent antistatic properties. Is preferable.
The anionic surfactant containing P atom is not particularly limited, and examples thereof include metal salts / or amine salts of alkyl phosphate esters (hereinafter abbreviated as phosphate), metal salts / or amine salts of polyoxyethylene alkyl phosphate. Can be mentioned. Examples include lauryl phosphate potassium salt, lauryl phosphate sodium salt, octyl phosphate potassium salt, and octyl phosphate sodium salt.
The anionic surfactant containing an S atom is not particularly limited, and examples thereof include alkane sulfonate. These antistatic agents can be used alone or in combination of two or more as required.

(Modified silicone)
When the treatment agent of the present invention further contains a modified silicone, it is preferable because the fiber-to-fiber friction is appropriately reduced to improve the package appearance and the unwinding property.
Although it does not specifically limit as modified silicone, EO modified silicone, PO / EO modified silicone, alkyl modified silicone, ester modified silicone, carbinol modified silicone, epoxy modified silicone, carboxy modified silicone, mercapto modified silicone are mentioned. Since the compatibility with the polyoxyalkylene alkyl ether (A) is excellent, EO-modified silicone or PO / EO-modified silicone is preferable from the viewpoint of easily obtaining the effect of the present application.

  Further, the synthetic fiber treating agent of the present invention includes a lubricant, an emulsifier, a penetrating agent, an antistatic agent (provided that an anionic surfactant containing P atoms and S atoms are included) as long as the effects of the present invention are not impaired. You may contain as needed) except anionic surfactant. The total weight ratio of these lubricants, emulsifiers, penetrants, antistatic agents, etc. in the non-volatile content of the treatment agent is preferably 50% by weight or less from the standpoint of more manifesting properties such as fiber convergence and oil film reinforcement. 40% by weight or less, more preferably 30% by weight or less, and most preferably 20% by weight or less.

There are no particular limitations on the lubricant, and known lubricants can be employed. For example, methyl oleate, butyl palmitate, butyl stearate, butyl oleate, isooctyl laurate, isooctyl palmitate, isooctyl stearate, isooctyl oleate, lauryl oleate, isotridecyl stearate, hexadecyl stearate, iso Fatty acid ester compounds (esters of monohydric alcohol and monohydric carboxylic acid) such as stearyl oleate, oleyl octanoate, oleyl laurate, oleyl palmitate, oleyl stearate, oleyl oleate; diethylene glycol dilaurate, diethylene glycol dioleate, hexamethylene Glycol dilaurate, hexamethylene glycol dioleate, neopentyl glycol dilaurate, trimethylolpropane tricaprylate, Esters of polyhydric alcohols such as limethylolpropane trilaurate, trimethylolpropane tripalmitate, trimethylolpropane trioleate, glycerol trioleate, pentaerythritol tetralaurate, pentaerythritol tetraoleate and monovalent carboxylic acids; Many such as malate, diisotridecyl adipate, dicetyl adipate, dioleyl adipate, dioctyl sebacate, dilauryl sebacate, distearyl sebacate, dioctyl azelate, distearyl azelate, dioctyl phthalate, trioctyl trimellitate Ester of monovalent carboxylic acid and monohydric alcohol; neodol 23 (synthetic alcohol manufactured by Shell) added with 2 moles of ethylene oxide and ester of lauric acid An ester of octyl alcohol with 2 moles of ethylene oxide and lauric acid, a neoester 23 with 2 moles of ethylene oxide added with diester of adipic acid, an isotridecyl alcohol with 2 moles of propylene oxide added, Ether ester of alcohol and carboxylic acid with addition of alkylene oxide such as ester with lauric acid, block of ethylene oxide and propylene oxide or polymer with both ends or one end blocked with carboxylic acid Etc.
Among these, an ether ester is preferable from the viewpoint that the effects of the present application are easily exhibited due to excellent compatibility with the alkyl ether (A) and the polyether (B).
The ether ester means a compound having a structure in which a polyoxyalkylene alkyl ether and a fatty acid are ester-bonded.
Two or more kinds of these lubricants can be used in combination as needed. The lower limit of the weight ratio of the lubricant to the non-volatile content of the treatment agent is preferably 0% by weight, more preferably 1% by weight, and even more preferably 3% by weight. The upper limit of the weight ratio of the lubricant to the nonvolatile content of the treatment agent is preferably 30% by weight, more preferably 20% by weight, further preferably 15% by weight, and particularly preferably 10% by weight.

  Emulsifiers and penetrants are used to stabilize the aqueous solution of the treatment agent, to assist the adhesion to the fiber, or to allow the treatment agent to be washed from the fiber with the treatment agent attached thereto. May be. There is no limitation in particular as an emulsifier and a penetrant, A well-known thing is employable. For example, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene nonylphenyl ether and the like having a weight average molecular weight of 300 or more and less than 1000 can be mentioned. In addition, polyoxyethylene lauryl amino ether, polyethylene glycol monolaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol diolate, glycerin monooleate, sorbitan monooleate, polyoxyethylene glycerin monolaurate, polyoxyethylene sorbitan trio Nonionic surfactants such as rate, polyoxyethylene castor oil ether, polyoxyethylene hydrogenated castor oil ether and the like can be mentioned. These emulsifiers and penetrants can be used alone or in combination of two or more as required. The weight ratio of the emulsifier and penetrant in the nonvolatile content of the treatment agent is not particularly limited, but is preferably 0.1 to 40% by weight, and more preferably 5 to 30% by weight. These emulsifiers and penetrants may be used to impart antistatic properties to the fiber yarns, or to impart lubricity and convergence.

  In addition to the components such as the lubricant, the emulsifier, the penetrating agent, and the antistatic agent described above, components such as an antioxidant, an antiseptic, a rust preventive, and an antifoaming agent may be used as necessary.

  Since the processing agent for synthetic fibers of the present invention has an appropriate aqueous solution kinematic viscosity, the appearance of the package becomes good. Therefore, the effect of the present application can be obtained when the appearance of the package is particularly required for friction false twisting. It is easy to be done.

The treatment agent for synthetic fibers of the present invention is particularly suitable when it is a treatment agent for friction false twisting of synthetic fibers from the viewpoint described below.
In general, a false-textured yarn (Draw Texting Yarn; hereinafter abbreviated as DTY) is provided with a friction false twist treatment agent to produce a partially oriented yarn (Partially Oriented Yarn; hereinafter abbreviated as POY), and then a heating device ( It is obtained by heating the yarn with a heater) and drawing it while twisting the yarn with a false twisting device.

  In recent years, production of special yarns such as high-value-added fine denier yarns, full-dal yarns and bright modified cross-sectional yarns has been increasing as types of processed yarns using this method. In general, these special yarns are prone to problems such as fiber misalignment, tension fluctuation, and antistatic failure due to friction between fibers and rollers, fibers and guides, fibers and false twisting units, and fibers. It is known.

That is, there is a need for a treatment agent that can ameliorate these problems for brands that have been increasing in production and are likely to have poor fiber focusing or fluctuations in tension.
The synthetic fiber treatment agent of the present invention has an appropriate aqueous solution kinematic viscosity, and therefore the appearance of the package is improved due to poor focusing and fluctuations in tension. Therefore, the synthetic fiber friction false twist treatment agent is used. Especially suitable in some cases.

  The treatment agent for synthetic fibers of the present invention is generally applied to a synthetic fiber filament as a treatment agent having a non-volatile content in the treatment agent of 80% by weight or more from the viewpoint of transportation cost and stability of the treatment agent. Transferred to the factory. The treatment agent of the present invention has very good stability of the treatment agent, and can prevent poor appearance and separation of components. As a result, the treatment agent uniformly adheres to the synthetic fiber, and the problems that occur in the yarn forming process and the post-processing process can be greatly improved.

  It is preferable that the processing agent for synthetic fibers of this invention contains an external appearance regulator further. The stability of the treating agent can be improved by the appearance modifier. The appearance adjusting agent is a component that is volatilized and removed by heat treatment in the synthetic fiber manufacturing process. 0.1 to 20 weight% is preferable and, as for the weight ratio of the external appearance regulator to the whole processing agent, 3 to 12 weight% is more preferable. When the weight ratio of the appearance modifier exceeds 20% by weight, the performance as a fiber treating agent deteriorates, and in the production of false twisted yarn of synthetic fiber, fluff, broken yarn, white powder, The processing defects of the dyeing spots cannot be reduced, but there is a possibility that the processing defects are increased.

  There are no particular limitations on the appearance modifier, and known ones can be employed. Appearance preparation agents include water and lower alcohols. Examples thereof include water, ethylene glycol, propylene glycol, isopropyl alcohol, glycerin, butyl diglycol and the like. Among these, water, ethylene glycol, and glycerin are preferable. Appearance preparation agents can be used alone or in combination of two or more as required.

The treatment agent for synthetic fibers of the present invention may be composed of the above-mentioned components consisting only of a non-volatile content, or may be composed of a non-volatile content and an appearance modifier, and the non-volatile content is diluted with a low-viscosity mineral oil. The thing may be sufficient and the aqueous solution which emulsified the non volatile matter in water may be sufficient. In the case of an aqueous solution obtained by emulsifying the nonvolatile content in water, the concentration of the nonvolatile content is preferably 5 to 20% by weight, more preferably 6 to 15% by weight, further preferably 8 to 12% by weight, and most preferably 10% by weight.
About the manufacturing method of the processing agent for synthetic fibers of this invention, there is no limitation in particular and a well-known method is employable. The treatment agent is usually produced by mixing the constituent components described above in an arbitrary order.
In the treatment agent for synthetic fibers of the present invention, the kinematic viscosity of the treatment agent becomes an appropriate value, and the content of the polyhydric alcohol fatty acid ester is 10% by weight with respect to the non-volatile content of the treatment agent from the viewpoint that the effect of the present application is easily exhibited. Or less, more preferably 6% by weight or less, further preferably less than 2% by weight, particularly preferably 1% by weight or less, and most preferably 0% by weight.

[Synthetic filament yarn]
The synthetic fiber filament yarn of the present invention is obtained by adhering the synthetic fiber treating agent of the present invention to a (raw material) synthetic fiber filament yarn, and in the production of synthetic fiber false twisted yarn, the process of false twisting The processing defects of fluff, yarn breakage, white powder, and dyed spots generated in the process can be reduced, and the cleaning cycle of the heater can be extended. The amount of non-volatile matter deposited on the synthetic fiber treating agent is preferably 0.1 to 1.0% by weight, more preferably 0.2 to 0.8% by weight relative to the (raw material) synthetic fiber filament. 3 to 0.6% by weight is more preferable.
(Raw material) The method for applying the synthetic fiber treating agent of the present invention to the synthetic fiber filament is not particularly limited, and a known method can be employed. Usually given in the spinning process or drawing process of synthetic fiber filaments, (raw material) treatment agent consisting only of non-volatile content, treatment agent in which non-volatile content is diluted with low-viscosity mineral oil, or non-volatile in water Examples thereof include a method of oiling a water-based treatment agent emulsified with roller oil supply, nozzle oil supply, or the like.

  The treatment agent for synthetic fibers of the present invention is particularly suitable for false twisting of synthetic fibers such as polyester fibers, polyamide fibers, and polypropylene fibers. As the polyester fiber, polyester (PET) having ethylene terephthalate as a main constituent unit, polyester (PTT) having trimethylene ethylene terephthalate as a main constituent unit, polyester (PBT) having main constituent unit of butylene ethylene terephthalate, and lactic acid are mainly used. Examples thereof include polyester (PLA) as a structural unit, examples of polyamide fibers include nylon 6 and nylon 66, and examples of polypropylene fibers include polypropylene.

[Method for producing false twisted yarn]
The manufacturing method of the false twisted yarn of the present invention includes a step of heating, stretching, and false twisting the synthetic fiber filament yarn to which the above-described synthetic fiber treating agent of the present invention is attached, It is possible to reduce processing defects such as fuzz, yarn breakage, white powder, and dyed spots that occur in the false twisting process, and it is possible to extend the cleaning cycle of the heater. There is no limitation in particular as the method of false twisting, A well-known method is employable. For example, the method etc. which were described in WO2009 / 034692 are mentioned.
There are no particular restrictions on the false twisting conditions, but from the point that it can be more effective, it is a contact type (hot plate contact heating method) false twisting that directly heats the synthetic fiber filament yarn to the hot plate of the heat source. It is preferable to perform false twisting using a machine. Such a hot plate contact heating type false twisting machine has a heater temperature of 160 ° C. to 230 ° C., a heater length of 150 cm to 250 cm, and a synthetic fiber filament thread that travels in contact with the surface of the heater plate. It is. The processing speed is usually 500 to 1000 m / min, preferably 600 to 800 m / min.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, it is not limited to the Example described here. The percentage (%) shown in the text and the table indicates “% by weight” unless otherwise specified. In Examples and Comparative Examples, each evaluation was performed based on the following method.

First, polyoxyalkylene alkyl ethers POA-1 to 9 and POA-D1 to 9 of Production Examples 1 to 9 and Production Comparative Examples 1 to 9 were obtained as follows.
<Production Example 1>
Stirring, the temperature can be adjusted, alkylene oxide charge tank, nitrogen supply tube, into the autoclave 3L equipped with a pressure control valve, and alcohol 221g of _{C 14 to 15} branched chain as alcohols, potassium hydroxide 3.5g alkali catalyst Was charged. After the atmosphere in the autoclave was replaced with nitrogen, dehydration was performed at 100 to 110 ° C. for 1 hour with stirring. Next, to obtain a desired molar ratio, 132 g of ethylene oxide is used as the first stage, and a mixture of 1160 g of propylene oxide and 880 g of ethylene oxide is used as the second stage, with a gauge pressure of 0.0 to 0.4 MPa, a reaction temperature of 140 to The addition polymerization reaction was carried out at 150 ° C. for about 15 hours. Thereafter, the polyoxyalkylene alkyl ether obtained was neutralized with 5.3 g of lactic acid and recovered. In this way, polyoxyalkylene alkyl ether (POA-1) was obtained.
In Production Examples 2 to 9 and Production Comparative Examples 1 to 9, except that alcohols in each example described in Table 1 and Table 2, addition mole number of ethylene oxide and propylene oxide, and addition form (mode) were changed, In the same manner as in Production Example 1, POA-2 to 9 and POA-D1 to 9 were obtained (Tables 1 and 2).

<Kinematic viscosity of 10% strength aqueous solution at 25 ° C.>
(Method for preparing 10% strength aqueous solution)
First, 88.9 g of ion-exchanged water at 25.0 ° C. was filled in a 100 mL glass beaker. Next, 11.9 g (25.0 ° C.) of the synthetic fiber treatment agent prepared in Example 1 (non-volatile content: 90%) was charged into the ion-exchanged water under stirring, and the stirring was continued for 30 minutes. A 10% strength aqueous solution was prepared. The appearance of the obtained 10% aqueous solution was colorless and transparent, and the transmittance was 99.1%.
In Examples 2 to 9 and Comparative Examples 1 to 9, 10% strength aqueous solutions were prepared in the same manner as described above except that the amounts of ion-exchanged water and synthetic fiber treating agent were changed.
For measuring the kinematic viscosity of a 10% aqueous solution, 10 g of a sample is put into a Canon Fenceke viscometer and kept in a thermostatic chamber adjusted to 25 ° C. for 15 minutes. Thereafter, the outflow time (seconds) for the sample to pass between the marked lines of the viscometer was measured, and the value multiplied by the viscometer coefficient was taken as the kinematic viscosity.
Kinematic viscosity of 10% strength aqueous solution μ = f × t
{Factor: 0.0102, outflow time: t [sec]}
The 10% aqueous solution means an aqueous solution in which 90 parts by weight of ion-exchanged water and 10 parts by weight of the non-volatile content of the treatment agent are dissolved or emulsified. Usually, the emulsified state is referred to as an emulsion or an emulsion. However, since a 10% concentration aqueous solution of the treatment agent of the present invention is often transparent, it is described in a unified manner in terms of an aqueous solution. Therefore, the 10% concentration aqueous solution includes the concept of an aqueous solution that is transparent in appearance and an emulsion that is translucent or opaque.
The non-volatile content in the present invention refers to an absolutely dry component when the treatment agent is heat treated at 105 ° C. to remove volatile components such as a solvent and reach a constant weight.

<Transmissivity>
The transmittance of the treating agent for synthetic fibers prepared in Examples and Comparative Examples was measured with a spectrophotometer U-1900 Spectrophotometer manufactured by Hitachi, Ltd. The measurement conditions were defined as a wavelength of 750 nm and a measurement temperature of 25 ° C. If the transmittance is 95% or more, uniformity and stability as a synthetic fiber treating agent are easily exhibited. The most preferred transmittance is 100%.

(Examples 1-10, Comparative Examples 1-10)
In Examples 1-10, the compounding ingredient of Table 3 and Table 4 was mixed and stirred, and the processing agent for synthetic fibers was prepared. In addition, the polyethers 1-3 in Table 3 and Table 4 are the following polyethers.
Polyether 1: PO / EO = 50/50, weight average molecular weight 5000 Random type polyether 2: PO / EO = 25/75, weight average molecular weight 2000 Random type polyether 3: PO / EO = 50/50 polyoxy Alkylene decyl ether,
Weight average molecular weight 800 Random type

Next, water was added to the prepared treating agent for synthetic fibers to prepare an aqueous solution in which the weight ratio of nonvolatile content was 10% by weight. Next, the non-volatile content of the treatment agent was discharged by a nozzle oiling system using a metering pump device on polyethylene terephthalate fuldal yarn having a titanium oxide content of 2.5%, which was discharged from the die with an extruder and solidified by cooling. An aqueous solution was applied so that the adhering amount was 0.6% by weight, and a POY of 130 dtex / 72 filaments was spun and wound at a speed of 3100 m / min to obtain 14 kg of roasted cheese. Next, using the obtained POY, with a false twisting machine that is a hot plate contact heating method, the drawing false twisting is performed continuously for 10 days under the following false twisting conditions, and false twisted yarn (DTY) was obtained. The package appearance, false twisted yarn breakage, contact heater contamination, white powder generation amount, and evaluation of the knitted fabric dyeing group were performed by the following methods. The results are shown in Tables 3 and 4.
In addition, the numerical value of the non volatile matter in Tables 3 and 4 and a volatile matter is a weight part.

<False twist processing conditions>
Stretch false twist condition false twisting machine of false twisting machine that is hot plate contact heating method: HTS-15V manufactured by Teijin Seiki Co., Ltd.
Processing speed: 1000m / min
Stretch ratio (DR): 1.60
Twisting device: 3-axis disk friction system 1-5-1
(1 guide disk-5 working (polyurethane) disks-1 guide disk)
Disk speed / thread speed (D / Y): 1.8
Overfeed rate: 3%
First heater (twisted side) temperature: 200 ° C
Second heater (untwisting side) Temperature: Room temperature Processing days: 10 days

<Package appearance>
After spinning 130 decitex / 72 filament POY and winding 14 kg of cheese (package) at a speed of 3100 m / min, the appearance of the package was evaluated by visual judgment as follows.
◎: No bulge, twill fall, end fluff ○: Only one or two end face fluffs △: Twill fall, end face fluff ×: Bulge, twill fall, end fuzz occurs

<Unraveling>
Using TORAY ENGINEERING CO., LTD. Package Analyzer PA-701, the unwinding tension {unwinding conditions; 1000 m / min, 10 minutes} of POY of 130 dtex / 72 filaments was evaluated. The larger the abnormal tension and the fluctuation range of the tension, the worse the winding shape of the package, leading to poor post-workability.
A: No abnormal tension is observed, and the tension is stable (2 g or less).
○: Fluctuation range of tension 2g to 4g Δ: Abnormal tension is confirmed ×: Abnormal tension exists and thread breakage

<False twisted yarn>
After drawing and false twisting, the number of yarn breaks was evaluated as follows. As the number of yarn breaks increases, fluff is more likely to occur.
◎: 0 times ○: 1-2 times △: 3-4 times ×: 5 times or more

<Contact heater contamination>
After performing the drawing false twisting, the contamination state of the heater was visually evaluated as follows.
A: The heater is not dirty.
○: Only a part of the heater is dirty.
Δ: About half of the heater is dirty.
X: The heater is completely dirty.

<White powder generation amount>
After performing the drawing false twisting process, the false twisting disk and the amount of white powder generated around it were visually evaluated as follows.
A: No white powder after processing for 10 days.
○: Some white powder after processing for 10 days.
Δ: White powder generated and accumulated after processing for 5 days.
X: White powder is generated and accumulated from the start of processing.

<Knit fabric dyeing group>
After performing the drawing false twisting process, the obtained processed yarn was knitted with a circular knitting machine manufactured by Koike Machinery Co., Ltd., and the polyester knitted fabric was dyed. The dyeability of the obtained knitted fabric was evaluated as follows.
◎: No staining spots ○: Owns 1 to 2 staining spots △: 3 or more staining spots are observed ×: Many staining spots are observed, and staining stripes are also observed

As can be seen from Table 3, in Examples 1 to 9, the treatment agent for synthetic fibers containing the polyoxyalkylene alkyl ether (A) represented by the general formula (1) of the present invention, which is 10% at 25 ° C. Since the processing agent for synthetic fibers whose kinematic viscosity of concentration aqueous solution is 2.0-3.0 mm < ² > / s is provided, it is excellent in a package external appearance and unwinding property.
On the other hand, as can be seen from Table 4, in Comparative Examples 1 to 9, in the case of polyoxyalkylene alkyl ethers having different alkyl groups (Comparative Examples 1 to 4 and Comparative Examples 6 to 9), the alkyl groups are the same but in the block form. In some cases (Comparative Example 5), since the kinematic viscosity of the 10% strength aqueous solution is not in the range of 2.0 to 3.0 mm ² / s, either the package appearance or the unwinding property cannot be solved.

  Since the synthetic fiber to which the treating agent for synthetic fiber of the present invention is applied is excellent in package appearance or unwinding property, it is possible to improve production efficiency and process with excellent quality in the post-processing step.

Claims (9)

A treatment agent for synthetic fibers containing a polyoxyalkylene alkyl ether (A) represented by the following general formula (1), wherein the aqueous solution having a concentration of 10% by weight of the non-volatile content of the treatment agent has a kinematic viscosity at 25 ° C. The processing agent for synthetic fibers which is 2.0-3.0 mm < ² > / s.
^{R 1 O - [(PO)} a / (EO) b] -H (1)
(Wherein R ¹ represents a branched alkyl group having 14 or 15 carbon atoms, PO represents an oxypropylene group, EO represents an oxyethylene group, a and b represent the average number of moles added, and a = 1 to 100, b = 1 to 100. [(PO) a / (EO) b] is a polyoxyalkylene group formed by randomly adding a mole of PO and b mole of EO.) The processing agent for synthetic fibers according to claim 1, further comprising a polyether (B) represented by the following general formula (2).
^{R 2 O - [(PO)} c / (EO) d] -H (2)
(However, R ² represents a hydrogen atom or a linear or branched alkyl group having 1 to 13 or 16 to 24 carbon atoms. PO represents an oxypropylene group, EO represents an oxyethylene group. The average number of moles added is c = 1 to 100 and d = 1 to 100. [(PO) c / (EO) d] is formed by randomly adding c mole PO and d mole EO. It is a polyoxyalkylene group.)   The treatment for synthetic fibers according to claim 1 or 2, wherein the molecular weight calculated from the measurement of gel permeation chromatography (GPC) of the polyoxyalkylene alkyl ether (A) and the polyether (B) is 200 to 12000. Agent.   The synthesis | combination in any one of Claims 1-3 whose total weight ratio of the said polyoxyalkylene alkyl ether (A) and the said polyether (B) which occupies for the non volatile matter of a processing agent is 3-99 weight%. Treatment agent for textiles.   The processing agent for synthetic fibers according to any one of claims 1 to 4, further comprising at least one selected from an anionic surfactant containing P atoms and an anionic surfactant containing S atoms.   The processing agent for synthetic fibers according to any one of claims 1 to 5, further comprising a modified silicone.   The processing agent for synthetic fibers according to any one of claims 1 to 6, which is used for friction false twisting.   A synthetic fiber filament yarn obtained by attaching the synthetic fiber treating agent according to any one of claims 1 to 7 to a (raw material) synthetic fiber filament yarn.   A method for producing a false twisted yarn, comprising the steps of heating, stretching and false twisting the synthetic fiber filament yarn according to claim 8.