JPH11158770A - Spinning oil for synthetic fiber and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply and uniformly adhere a spinning oil to a yarn, and to prevent various troubles caused by the ununiform supply of the spinning oil, such as the fluctuation of a tension and the breakage of the yarn due to the abrasive resistance of the yarn to its contacting guide, etc., the generation of fuzz, a weak yarn or a uneven yarn and a failure on the unwinding of the yarn from a yarn-wound package, to stabilize processes for spinning the yarn and processing the yarn and improve the quality of the product. SOLUTION: This spinning oil for synthetic fibers does substantially not generate bubbles from its inner portion, when the atmospheric pressure is reduced to 350 hpa in a state that the spinning oil is left to stand at 50 deg.C. The method for producing the spinning oil for synthetic fibers comprises mixing a plurality of single components and subsequently subjected to a vacuum treatment down to 200 hpa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil agent for synthetic fibers suitably used in a melt-spinning step of a synthetic fiber yarn and a subsequent yarn processing step, and a method for producing the same. More specifically, by significantly improving the uniformity of oil agent application to fiber yarns, it is possible to prevent yarn breakage and abnormal quality in the production and processing of fiber yarns, and to improve the productivity and quality of fiber yarns. The present invention relates to an oil agent for synthetic fibers effective for improving the oil content and a method for producing the same.

[0002]

2. Description of the Related Art In a step of melt-spinning a synthetic fiber yarn, an oil agent containing a smoothing agent, an antistatic agent and the like is applied to a running fiber yarn.

In order to supply an oil agent to the fiber yarn,
A method is generally used in which an oil agent is supplied from a tank storing the oil agent to an oil supply head via an oil agent supply pipe or a metering pump, and the oil agent is attached to a yarn running in contact with the oil supply head. .

[0004] This oil supply head discharges the oil metered by an oil metering pump quantitatively from an oil agent discharge hole of a fixed type guide and travels in contact with the yarn contact surface of the guide. An oiling roller lubrication method, in which a lubricating agent is applied to a roller, a lubricating film is formed on the surface of a rotating roller, and the lubricating agent adheres to a yarn running in contact with the roller, is generally used.

[0005] The uniformity of the adhesion of the oil agent to the fiber yarn greatly affects the stability and quality in processing steps such as fiber yarn production and subsequent yarn processing.

If the adhesion of the oil agent to the yarn becomes non-uniform, and the portion where the adhesion of the oil agent is incomplete runs into contact with a guide or the like, the running yarn becomes very easily cut due to the contact resistance, and as a result, Not only does productivity drop significantly, but it also tends to cause fluff, tarmi, thread spots, etc., and even to cause quality abnormalities such as incomplete unwinding of the yarn from the winding package. This will adversely affect the process stability and quality of weaving and knitting.

Particularly, in a high-speed spinning process in which a synthetic fiber yarn such as polyamide or polyester is melt-spun and wound at a high speed of 2,000 m / min or more, the yarn runs at high speed and high tension to contact guides. , Are susceptible to adverse effects due to imperfections in oil adhesion.

However, when air in the atmosphere is dissolved in the oil or when air is entrained by a physical operation such as agitation, bubbles are deposited and remain in a part of the oil supply system, In addition, the oil agent is applied to the yarn in a state where bubbles are contained, or the bubbles are aggregated in the oil agent supply pipe to form large bubbles. In some cases, the oil may temporarily run out (oil discharge failure).

Thus, the gaseous component is contained in the oil agent,
If it precipitates or aggregates as bubbles in the oil agent supply system and stays, the uniform application of the oil agent to the fiber yarn is hindered, which has a very bad effect on productivity and quality.

In order to prevent such a decrease in fiber productivity and the occurrence of quality abnormalities due to the inclusion of gaseous components in the oil agent, various apparatuses and devices have been proposed for the purpose of uniformly applying the oil agent to the fiber yarn. A method has been proposed. For example, as described in Japanese Patent Application Laid-Open No. 8-74117, a bubble collecting tube is provided below a fuel supply guide to collect and remove bubbles immediately before the fuel supply guide, thereby stably running a uniform oil agent. Apparatus for applying yarn, or JP-A-61-275
As described in Japanese Patent Publication No. 412, a three-way branch pipe is provided between a refueling guide discharge hole and a lower refueling pump, and a metering refueling device for efficiently removing air bubbles mixed in an oil supplied to the refueling guide, and the like. Has been proposed.

As described above, the stable supply of the oil agent to the fiber yarn is a very important issue with respect to the productivity and the quality of the synthetic fiber. Although it is effective in suppressing the adverse effects caused by the precipitation and aggregation of the gas components, it is not a means to essentially suppress the generation of bubbles, so the formation of bubbles in the oil agent supply system and the effects of aggregation are completely eliminated. Cannot be prevented, and there is a problem in uniform adhesion of the oil agent.

[0012]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an oil agent for synthetic fibers and an improved method for producing the same, whereby the oil agent is stably supplied to the fiber yarn and adhered uniformly.
And various troubles caused by uneven supply of oils, such as tension fluctuations caused by rubbing resistance of guides that come in contact with yarn, breakage, generation of fluff, weak yarn, spots, and winding yarn The main object of the present invention is to prevent unwinding failure of a yarn from a package, stabilize a yarn forming process and a yarn processing process, and improve product quality.

Another object of the present invention is to provide an oil agent for synthetic fibers which can stabilize the supply of an oil agent to the synthetic fiber yarns and, consequently, has a high uniformity of oil agent adhesion to the fiber yarns. An object of the present invention is to provide a synthetic fiber oil agent capable of improving the productivity of a synthetic fiber yarn and improving the quality level based on the synthetic fiber yarn, and a method for producing the same.

[0014]

Means for Solving the Problems To achieve the above object, the synthetic fiber oil agent of the present invention has the following constitution. That is, when the pressure is reduced to 350 hpa in a state of standing at 50 ° C., substantially no bubbles are generated from the inside of the oil agent for synthetic fibers.

The method for producing an oil agent for synthetic fibers of the present invention has the following constitution. That is, this is a method for producing an oil agent for synthetic fibers, wherein a plurality of single components are blended and then the pressure is reduced to 200 hpa or less.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The amount of dissolved gas components is reduced so that bubbles are not generated even if the pressure of the oil is reduced, thereby suppressing the precipitation and aggregation of bubbles in the oil supply system and pulling the oil. This makes it possible to improve the yarn operability and quality.

To confirm the generation of air bubbles from the oil at the time of depressurization, a pressure-reducing circuit comprising a pressure-reducing pump 1 and a needle valve 2 is provided in a transparent pressure-resistant container 3 as shown in FIG. In addition to the adjustment, the oil agent can be heated by the hot plate 5.

Using such a device, the presence or absence of bubbles may be confirmed by observing the state of the oil agent during heating and decompression.

In this case, in order to confirm whether the gaseous component precipitates from the oil agent as air bubbles, the time for the decompression treatment is 1 hour.
It may be about 5 minutes.

The oil agent according to the present invention has a sufficient effect so that the formation of bubbles is not observed when the pressure is reduced to 350 hpa. However, it is preferable that the formation of bubbles is not observed even at a reduced pressure level lower than 350 hpa. It is more desirable that no bubble formation be observed even when the pressure is reduced to 100 hpa.

The oil agent for synthetic fibers according to the present invention is intended to suppress the formation of bubbles in the step of supplying the oil agent to the yarn by removing gas components dissolved therein, thereby achieving uniform oil agent adhesion. Therefore, it can be widely applied to emulsion oils and straight oils (low viscosity diluent combined type and crude oil imparting type).

However, in particular, the supply amount of the oil agent to the yarn is small, and bubbles are easily entrained.
Particularly effective is a 0% or less straight type synthetic fiber oil agent.

As in the present invention, in order to produce an oil agent for synthetic fibers in which the gas component is extremely dissolved, it is only necessary to mix a plurality of single components constituting the oil agent and then reduce the pressure to 200 hpa or less.

The optimal value of the level of the decompression treatment of the oil agent varies depending on the components contained in the oil agent.
It is preferable to perform the decompression treatment at 75 hpa in terms of the effects of the present invention and the treatment cost.

Further, at the time of the reduced pressure treatment, the oil agent is kept at 35 ° C. to 9
Heating between 0 ° C. is more preferably applied, because the removal of dissolved bubbles in the oil agent is ensured.

The time of the decompression treatment varies depending on the amount of dissolved gas contained in the oil agent, but may be about 5 minutes or more and about 3 hours or less.

According to the present invention, a synthetic fiber yarn composed of polyamide, polyester or the like is melt-spun, particularly as an oil agent for a yarn-making process for melt-spinning and winding a synthetic fiber yarn.
It can be suitably used in the case of winding at a high speed of 2000 m / min or more, and in the case of winding a yarn having a fineness of a single yarn of a fineness of 3 denier or less.

For example, a high-speed spinning step in which the spun yarn is taken up at a high speed and wound without substantial stretching, a direct spinning / stretching step in which the spun yarn is taken and subsequently drawn and wound at a high speed, or It can be used in an undrawn spinning step in which a spun yarn is wound without being substantially oriented.

[0029]

EXAMPLE 2 Nylon 6 chips containing 0.4% titanium oxide as a matting agent and having a relative viscosity of 2.62 with respect to 98% sulfuric acid were used.
After being melted at 60 ° C. and filtered through filter sand and a metal non-woven fabric filter, a molten polymer was spun from a die, and the spun yarn was cooled to give a substantially oil-free straight oil agent. Later, the confounding process is performed by compressed air,
It is drawn at 4167 m / min to the first godet roller and continuously taken at 5000 m / min to the second godet roller heated to 175 ° C. and stretched 1.20 times to a winding tension of 0.13 g / D. And wound it on a spindle drive type winder.

The winder used was of a type having two spindles, in which one of the spindles was wound up for a predetermined time and then the other spindle was automatically switched to another thread.

The wound yarn has a fineness of 70 deniers and 68 deniers.
Eight filaments were wound simultaneously on a single winder as a filament yarn, and when a package of 6 kg was formed, the yarn was automatically switched.

The oil is supplied from the storage tank 10 to the head tank 12 of the spindle as shown in FIG.
The oil was supplied from the head tank to the measuring pump 14, and the measured oil was discharged from a fixed oil supply guide 17 on which the yarn was in contact with and traveled and applied to the yarn.

The oil supply position by the oil supply guide was set 2,000 mm below the surface of the base, and the supply amount was set such that the amount of oil applied to the yarn was 0.6%.

The dissolved amount of the gaseous component is determined by mixing the single components and subjecting the stirred oil agent to a reduced pressure treatment at 50 ° C. for 1 hour.
It was adjusted according to the reduced pressure level.

In order to confirm the level of bubbles contained in the oil, the apparatus shown in FIG.
After 0 cc of the oil agent was gently transferred, the temperature was raised to 50 ° C., and then the pressure was reduced at 350 hpa in a vacuum container for 15 minutes, and the occurrence of bubbles at that time was evaluated.

By changing the dissolved amount of the gas component in the oil agent, the yarn breakage rate in the running evaluation, the presence or absence of air bubbles in the oil agent supply system, and the yarn spots on the wound yarn were changed. evaluated.

Specifically, four winders (32 yarns) are each made for one week at each level, and the yarn breakage rate (the number of yarn breaks with respect to the amount of yarn produced) during that time, and the generation of air bubbles in the oil supply pipe after one week. The presence or absence was evaluated as no bubble (○), minute amount of bubble (△), and many bubbles (×).

[0038] Yarn spots after one week of spinning were measured using a Wooster meter manufactured by Zellbeger.

The fact that a slight amount of bubbles was observed in the evaluation of reduced pressure bubbles at 350 hpa for 15 minutes for the oil agent subjected to a reduced pressure treatment at 300 hpa for 1 hour is presumed to have dissolved air during the storage and measurement operation.

Table 1 shows the results of this evaluation. Table 1
As shown in (1), in the oil agent for synthetic fibers according to the present invention, generation and accumulation of bubbles in the oil agent piping system during spinning were eliminated, the number of occurrences of thread breakage was small, and the yarn operability was extremely stable.

[0041]

[Table 1]

[0042]

The oil agent for synthetic fibers according to the present invention has a small amount of gas components dissolved in the oil agent, and suppresses air bubbles generated in the supply system when the oil agent is supplied to the fiber yarns. It is possible to suppress operability such as thread breakage due to the occurrence of oil and quality deterioration due to uneven adhesion of the oil agent.

[Brief description of the drawings]

FIG. 1 is an apparatus for evaluating the presence or absence of bubbles generated from an oil agent by reducing the pressure of the oil agent in a heated state.

FIG. 2 is an embodiment of an oil supply system in a step of producing a synthetic fiber yarn.

[Explanation of symbols]

 1: Decompression pump 2: Needle valve 3: Pressure-resistant container (transparent or with observation window) 4: Pressure gauge 5: Hot plate 6: Temperature adjustment dial 7: Thermometer 8: Glass container 9: Oil agent 10: Storage tank 11, 13, 16: oil supply pipe 12: head tank 14: metering pump 15: drive motor 17: refueling guide

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masataka Kashiwakura 1 Kitaichiri, Tatsunokuchi-cho, Nomi-gun, Ishikawa Pref. Matsumoto Yushi Pharmaceutical Co., Ltd. (72) Inventor Hiroshi Ishida 2-3-1, Shibukawa-cho, Yao-shi, Osaka Matsumoto Yushi Pharmaceutical Co., Ltd.

Claims (4)

[Claims] 1. 350 hours at 50 ° C.
An oil agent for synthetic fibers, wherein substantially no air bubbles are generated from the inside when the pressure is reduced to pa. 2. The synthetic fiber oil agent according to claim 1, wherein the oil agent is a straight type having a water content of 10% or less. 3. After mixing a plurality of single components, 200 hours
A method for producing an oil agent for synthetic fibers, which comprises reducing the pressure to not more than pa. 4. The method for producing an oil agent for synthetic fibers according to claim 3, wherein the oil agent is heated between 35 ° C. and 90 ° C. during the decompression treatment.