JP2000220044A - Spinning of polyester fiber yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for melt-spinning a polyester fiber yarn at a high spinning speed of >=2,000 m/min, making it possible to inhibit the staining of an interlacing nozzle and enabling the efficient and stable impartation of an oiling agent to the yarn. SOLUTION: This tnethod for melt-spinning a polyester fiber yarn comprises cooling and solidifying the spun polyester fiber yarn, imparting an oiling agent containing a polyether as a main component in an amount of 0.2-2.0 wt.%, passing the yarn through an interlace nozzle 4, further imparting an oiling agent containing the polyether as a main component in an amount of 9-20 wt.%, and then winding up the yarn at a spinning speed of >=2,000 m/min.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed spinning method for polyester fiber yarn. More specifically, the present invention relates to a method for spinning polyester fiber yarn which is melt-spun at a spinning speed of 2000 m / min or more.

[0002]

2. Description of the Related Art Conventionally, when a polyester is melt-spun, an oil agent is generally applied and then passed through an interlace nozzle. increase,
The problem that the quality of fluff and the like deteriorates has become apparent. Also,
Since the oil agent is scattered by the interlace nozzle, the adhesion efficiency of the oil agent is reduced. As an improvement method, for example, Japanese Patent Application Laid-Open No. 58-197308 discloses a method in which water is applied before passing through an interlace nozzle and an oil agent is applied after passing through. However, when this method is used, the contamination of the interlace nozzle can be improved, but there is a problem that the gear pump that supplies the oil agent seizes and a problem that rust occurs. Also, Japanese Patent Application Laid-Open No. Sho 62-15319
In Japanese Patent Application Laid-Open No. H10-157, a method is disclosed in which an oil agent that imparts smoothness to yarn is applied before the interlace nozzle treatment, and an oil agent that can impart water-resistant convergence after passing through the interlace nozzle. However, the purpose of this method is to impart smoothness to the yarn before entering the interlace nozzle, thereby reducing the fluff of the yarn. No mention is made of the adhesion efficiency of the oil agent. Further, according to this method, although the contamination of the interlace nozzle is improved as compared with the related art, there is a problem that a gel of an oil agent accumulates over time and must be cleaned periodically.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a method for high-speed spinning of polyester fiber yarn which is melt-spun at a spinning speed of 2000 m / min or more. It is an object of the present invention to provide a method of spinning polyester fiber yarn which can suppress the oil agent efficiently and stably apply the oil agent.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a polyester fiber yarn having a polyether content of 0.2 wt% or more and 2.0 wt% after the melt-spun polyester fiber yarn is cooled and solidified.
% After applying an oil agent diluted to a concentration of less than 10%, passing through an interlace nozzle, and further applying an oil agent diluted to a concentration of 9% or more and less than 20%.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 is a schematic view of a spinning machine showing one embodiment of the present invention.

After the yarn Y discharged from the die 1 is passed through the heat insulation zone under the die, air is blown from the chimney 2 perpendicularly to the yarn in the cooling section, whereby the yarn is cooled and solidified to the glass transition temperature or lower. After applying an oil agent containing polyether as a main component in the oil supply device 3 and performing confounding with the interlace nozzle 4, the oil agent is applied again in the oil supply device 5, taken up by the pair of godet rolls 6, and wound by the winder 7. It is a device to take.

[0008] The method of spinning a polyester fiber yarn of the present invention is characterized by a method of applying an oil agent and a shape of a threading portion of an oil supply guide of an oil supply device. I don't care.

The oil agent to be applied before passing through the interlace nozzle according to the present invention is prepared by diluting a stock solution of an oil agent containing polyether as a main component to a concentration of 0.2 wt% or more and less than 2.0 wt% with pure water to prepare an oil agent for yarn production. . By using an oil containing polyether as a main component before passing through the interlace nozzle, fluffing can be suppressed. Further, by diluting the oil agent, there is a self-cleaning effect, the accumulation of gel-like substances on the interlace nozzle is suppressed, and the contamination can be suppressed. here,
The concentration of the diluent oil is 0.2 wt% or more and less than 2.0 wt%. Preferably 0.5 wt% or more and 1.5 w
t%, more preferably 0.8%
It is set to be not less than wt and less than 1.2 wt%. If the concentration of the diluent oil is less than 0.2 wt%, fluff is generated and 2.0 w
This is because a gelled substance of the oil agent is deposited on the interlace nozzle at t% or more.

[0010] The composition of the stock solution of the oil agent used in the oil agent for spinning in the present invention is a polyether-based leveling agent of 5%.
0% by weight or more, as other components, an ester-based leveling agent,
Emulsifiers, antistatic agents, preservatives, and other additives. If the composition ratio of the polyether-based smoothing agent is less than 50 wt%, fluff is likely to occur, which is not preferable.

[0011] As a leveling agent constituting the stock solution of oil, ethylene oxide (EO) and / or propylene oxide (PO) may be formed into a block copolymer or a random copolymer in an alkyl group having 1 to 20 carbon atoms or a polyhydric alcohol. A compound having an added molecular weight of 1,000 or more and 6000 or less, further ethylene glycol distearate,
An ester compound of a monobasic aliphatic carboxylic acid such as trimethylolpropane distearate, trimethylolpropane trilaurate, and / or an alkylene oxide addition ester compound thereof, methylolate, i
-Esters of monohydric alcohols such as propyl myristate, octyl palmitate, oleyl laurate, oleyl oleate and monobasic aliphatic carboxylic acids, monohydric alcohols such as dioctyl sebacate, dioleyl adipate and polybasic aliphatic carboxylic acids Examples include acid esters, dioctyl phthalate, trioleyl trimellitate and other monohydric alcohols and aromatic carboxylic acid esters. If the molecular weight of the polyether-based smoothing agent is less than 1000, fluff is generated,
If it exceeds 6000, the nozzle becomes contaminated.

As the emulsifier, lauryl alcohol, i
-Alkylene oxide adducts of monohydric hydroxy compounds such as stearyl alcohol, oleyl alcohol and octyl phenol, polyhydric alcohol partial esters such as glycerin monooleate, sorbitan monolaurate, and trimethylolpropane distearate; Examples include alkylene oxide adducts, castor oil alkylene oxide adducts, alkylene oxide adducts of higher fatty acids such as myslic acid, stearic acid and oleic acid, and alkylene oxide adducts of amides derived from these fatty acids. As the alkylene oxide to be added here, ethylene oxide, propylene oxide or the like is used alone or in combination.

In addition, block copolymers of polyethylene glycol / polypropylene glycol, anionic surfactants such as triethanolamine laurate, diethanolamine oleate, and funnel oil, alkali metal salts of alkyl sulfonates and alkali metal salts of alkali phosphates Salts, alkali metal salts of polyalkylene glycol alkyl phosphates, fatty acid soaps, antistatic agents such as alkylimidazolines, and other conventionally known sizing agents, rust inhibitors, preservatives, antioxidants, and the like can be added. It is not particularly limited to these.

As the oil supply device, an oiling roller system and an oil supply guide system are generally used. However, in the oiling roller system, an oil film is formed unevenly on the roller before passing through the interlace nozzle, and the oil agent is uniformly formed after passing through the interlace nozzle. In the spinning method of the present invention, oil is supplied by a refueling guide method because of the problem that the oil cannot be applied.

In the spinning method of the present invention, the shape of the threading portion of the oil supply guide is bent at one or more locations in a direction in which the threading portion presses at least the yarn, and the threading portion before and after bending has a straight portion. This further improves the adhesion efficiency.

FIG. 2 is a longitudinal sectional view for explaining a fuel supply guide and a yarn path guide according to the present invention.

The bending of the yarn-attaching portion means that the two yarn-attaching portions 11 change the running direction of the contacting yarn as shown in FIG.
a, and that of the portion formed by having a 11b (indicated by the bending angle theta _1), the bent portion may be any number if more than one. Further, each of the yarn joining portions has a straight portion. The shape of the bent portion between the yarn joining portions is not particularly limited, but a surface having a curvature is more preferable in order to reduce damage to the yarn. Further, a recess for receiving the oil agent may be provided at any place of the threading portion.

In the bending angle (θ ₁ ), the maximum bending angle θ _max is preferably 3 ° or more in order not to be affected by the accompanying airflow, and it is sufficient if it is less than 15 °.
Preferably it is 10 ° or less. When the angle is 15 ° or more, the yarn is greatly damaged, and there is a problem such as fluff.

The oil discharge hole 9 is desirably provided on the slope 10 above the threading portion so as not to touch the oil supply guide body before the thread touches the discharged oil. It is desirable that the angle between the slant surface 10 of the oil discharge hole and the threading portion 11a with respect to the yarn running direction is as small as possible, and it is more effective to make the angle equal to or less than 10 ° for uniform adhesion.

The lubricating device includes a lubricating guide 8 and a yarn path guide 12 for defining a yarn traveling direction. The relationship between the bending angle θ _L between the final threading portion 11b of the refueling guide and the yarn running direction and the maximum bending angle θ _max of the refueling guide threading portion is represented by the following formula (2) by the thread guide guide 12. Setting the range is more effective.

0 <θ _L <15−0.8θ _max (2) By setting θ _L to an angle exceeding 0 °, the yarn at the final yarn-attached portion can sufficiently contact and travel, and oil adheres. Becomes uniform. Further, by less than 15-0.8Shita _max, yarn contact portion to prevent the lowering of yarn properties by abrasion of the yarn guides, and has a running stability of the yarn.

The groove width W of the lubrication guide after passing through the interlace nozzle is the same width as the entire width of the thread connecting portion, and the groove width is preferably 0.4 mm or more and 1.0 or less, more preferably 0 mm or less. 0.6 mm or more and 0.8 mm or less.
If it is less than 0.4 mm, the yarn is caught by the guide and the yarn breaks, and if it is more than 1.0 mm, the efficiency of adhering the oil agent is deteriorated, and the oil film becomes thinner, causing a problem that the guide surface is rubbed and fuzzed. .

When oil is applied to the traveling yarn Y using the oil supply guide of FIG. 2, the oil discharged from the discharge hole 9 is
It flows into the threading section along the slope 10 provided above the threading section, and flows along the bent threading sections (11a and 11b in FIG. 2). An oil agent is applied to the yarn by making contact with the yarn Y traveling simultaneously on the yarn joining portion on the yarn joining portion. Further, the traveling yarn Y travels along the yarn path guide 12 provided below the refueling guide, so that the bending angle θ _L of the refueling guide can be set arbitrarily and the yarn can travel stably. .

By providing a bent portion in the yarn joining portion, uneven flow of the oil agent in the yarn attaching portions 11a and 11b due to the accompanying air flow and yarn sway at the yarn joining portion of the yarn can be suppressed, and the oil agent can be uniformly attached. In other words, the inclined surface 10 from the discharge hole 9 to the threading portion or the threading portion 11a located in the same direction as the running of the yarn is susceptible to the accompanying airflow flowing along with the yarn, and uniform lubrication is difficult only with the threading portion 11a. However, by having the bent portion, the accompanying airflow is generated at the threading portion surface 11 above the bent portion.
Since the air flows along the line a, it is possible to cut efficiently without disturbing the accompanying airflow, and it is possible to prevent the influence of the accompanying airflow on the yarn joining portion 11b below the bent portion. In addition, the effect of regulating the yarn is provided by the bent portion and the yarn joining portion 11b thereunder, thereby improving the adhesion of the oil agent at the yarn joining portion 11b below the bent portion and, at the same time, the yarn yarn of the bent portion upper portion 11a. Shaking can be reduced, and stabilization of running can prevent sticking spots.

The shape of the yarn-joining portion in the yarn running direction is not particularly limited. However, as described above, in order to effectively cut the accompanying airflow, the yarn-yarning portion before and after bending has a straight line running. Is on top.

The discharge hole 9 is provided on the inclined surface 10 above the yarn joining portion so as to prevent the yarn from directly touching the yarn before the oil agent is adhered. The problem of fluff can be prevented. The shape of the discharge hole 9,
The position and the like are not particularly limited.However, in order to reduce the influence of the accompanying airflow, it is more preferable that the discharge hole is close to the yarn joining portion and that the angle between the accompanying airflow direction carried by the yarn and the slope is smaller. preferable. Although the yarn path guide angle 12 is not particularly limited, by providing the yarn guide angle at the above-described predetermined angle, the yarn regulating effect under the bent portion can be achieved without excessively applying tension to the yarn joining portion of the oil supply guide. Can be granted. In particular, when the threading portion of the refueling guide has a flat surface, it is possible to spread the yarn uniformly regardless of the shape of the yarn path guide, which is effective.

[0027]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples. The characteristic values in the examples were obtained by the following methods. (A) Corrosion resistance to metal Make the oil agent the specified concentration, penetrate the knitting needle into the oil agent,
The state of corrosion after 20 days had been measured.

Examples 1 to 4 and Comparative Examples 2 to 9 Polyester having an intrinsic viscosity [η] of 0.64 was melted at 290 ° C., and the spinning apparatus shown in FIG.
, And were wound at a spinning speed of 5500 m / min to produce a 50-denier 36-filament polyester yarn. The lubricating device is installed before and after passing through the interlace nozzle, and the obtained yarn has an oil adhering amount of 1.5%.
The melt-spinning was performed by adjusting the discharge amount of the oil agent so that
The oil used after passing through the interlace nozzle is 1
An oil agent A having a 5% concentration of an ester-based smoothing agent as a main component was used. The lubrication guide after passing through the interlace nozzle used a shape having no bent portion in the tang portion, and the lubrication guide having a groove width W of 0.7 mm entirely penetrating the tang portion was used. Comparative Example 1 The same method as in Example 1 was used except that the oiling device after passing through the interlace nozzle was removed, and that the oil agent A having a concentration of 15% used after passing through the interlace nozzle in Example 1 was used before passing through the interlace nozzle. .

The result of evaluating the metal corrosiveness of the oil agent before passing through the interlace nozzle, the amount of oil adhering to the obtained yarn was measured, the result of calculating the adhering efficiency, the state of nozzle fouling over 3 days, and the obtained result. Table 1 shows the results of measuring the fluff of the yarn.

[0030]

[Table 1]

By employing the spinning method of the present invention,
Interlace nozzle stains and fluff are improved, and the adhesion efficiency can be increased.

In Comparative Example 1, since the oil agent A containing an ester-based smoothing agent as a main component was applied, the change in the hydrolytic viscosity was large, the oil agent was deposited on the interlace nozzle, and the interlace nozzle was stained. In Comparative Example 2, since the metal corrosion resistance was inferior, seizure and rust of the gear pump occurred during long-term use. In Comparative Example 3, contamination of the interlace nozzle, seizure of the gear pump, and rust were improved, but fluff was generated. In Comparative Example 4, the fluff was generated, the oil agent was deposited on the interlace nozzle, and the interlace nozzle was stained.

If the oil agent concentration before passing through the interlace nozzle is less than 0.2%, fluff is generated, and if it is 2.0% or more, contamination of the interlace nozzle over time becomes apparent.

If the molecular weight of the polyether-based smoothing agent of the oil agent before passing through the interlace nozzle is less than 1,000, fluff is generated, and if it exceeds 6,000, stains on the interlace nozzle become apparent. If the composition ratio of the polyether-based smoothing agent is less than 50%, fluff is generated. Using the oil guide having the shape shown in FIG. 2 as a refueling guide post Example 5-14 interlacing nozzle passage, the bending angle θ _max (θ ₁₎ of yarn contact portion surface is formed, and the final yarn contact portion plane and the lower The same procedure as in Example 2 was carried out except that the angle θ _L formed by the thread and the groove width W entirely passing through the threaded portion of the lubrication guide were set to the conditions shown in Table 2 below, and a polyester yarn of 50 denier and 36 filaments was used. I got

The oil adhesion efficiency and the fluff of the obtained yarn were measured. Table 2 shows the results.

[0036]

[Table 2]

By setting an appropriate angle, the flow of the oil agent before and after the bent portion can be made uniform, the stabilization of the running yarn can be maintained, and the adhesion amount and yarn quality can be stabilized. Also,
By setting the appropriate groove width, fluff is suppressed.

[0038]

According to the present invention, the scattering of the oil agent when passing through the interlace nozzle can be suppressed, and the stain can be improved. in addition,
The seizure of the gear pump with conventional water and the generation of rust can be suppressed. And the adhesion efficiency of an oil agent can be improved and can be applied stably.

[Brief description of the drawings]

FIG. 1 is a schematic process diagram showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view illustrating a fuel supply guide and a yarn path guide according to the present invention.

[Description of Signs] 1: Base 2: Chimney 3: Lubrication device before passing through interlace nozzle 4: Interlace nozzle 5: Lubrication device after passing through interlace nozzle 6: Gode roller 7: Winding machine 8: Lubrication guide 9: Oil supply hole 10: Upward slope of oil supply hole 11a, 11b: Yarn portion 12: Yarn guide guide θ ₁ : Bending angle formed by contact surfaces 11a, 11b θ _L : Final yarn portion surface and yarn formed by lubrication guide Angle Y: Yarn

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L033 AA07 AB01 AC15 BA11 BA14 BA21 BA22 CA48 4L035 BB33 BB34 BB60 BB61 BB84 4L036 MA05 MA33 PA01 PA26 PA42 UA21 UA30

Claims (6)

[Claims] 1. When melt-spinning a polyester, the melt-spun polyester fiber yarn is cooled and solidified, and then contains 0.2 wt% or more and 2.0 wt% containing polyether as a main component.
After applying an oil agent diluted to a concentration of less than 9 wt% and passing through an interlace nozzle, applying an oil agent diluted to a concentration of 9 wt% or more and less than 20 wt%, and winding at a spinning speed of 2000 m / min or more. Of spinning polyester fiber yarn. 2. As an oil agent before passing through an interlace nozzle, ethylene oxide (EO) and / or propylene oxide (PO) are added to an alkyl group having 1 to 20 carbon atoms or a polyhydric alcohol in a block copolymer or random copolymer form. 2. The method for spinning polyester fiber yarns according to claim 1, wherein one or more compounds having a molecular weight of 1,000 or more and 6000 or less are contained. 3. The method according to claim 1, wherein the application of the oil agent is performed by an oil supply guide. 4. The lubrication guide according to claim 1, wherein the shape of the lubrication guide is bent at at least one position in the yarn running direction with respect to the running direction of the yarn, and the yarn connection portions before and after bending have straight lines. Item 6. A method for spinning a polyester fiber yarn according to Item 3. 5. The maximum bending angle θ _max (°) formed by the threaded portion of the refueling guide and the angle θ _L (°) formed by the final threaded portion of the refueling guide and the lower running thread are as follows: 5. The method for spinning polyester fiber yarn according to claim 3, further comprising a yarn path guide that satisfies formulas (1) and (2). 3 ≦ θ _max <15 (1) 0 <θ _L <15−0.8θ _max (2) 6. The spinning of a polyester fiber yarn according to claim 3, wherein the groove width W (mm) of the oil supply guide after passing through the interlace nozzle satisfies the following expression (3). Method. 0.4 ≦ W ≦ 1.0 (3)