JP2588631B2 - How to apply oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides industrial polyester fibers with extremely high productivity by uniformly applying an oil agent to a high-speed running multifilament yarn having a single fiber fineness not fine denier. The present invention relates to a method for applying an oil agent for the purpose of obtaining.

[Prior Art] Conventionally, a method using an oiling roller has been used as the most general method of applying oil to a yarn.
The oiling roller method has no problem up to a yarn running speed of 1000 m / min class, but when the spinning take-up speed is over 2000 m / min, the accompanying airflow of the yarn increases and disturbs the oil film on the oiling roller surface. As a result, the uniformity of the adhesion of the oil agent is impaired, the frictional force between the yarn running at high speed and the roller surface is increased, the damage to the yarn is increased, and the maximum draw ratio (Max-DR) is reduced. Inferior yarns such as fluff yarns may be generated, which may significantly impair productivity.

[Problems to be Solved by the Invention] As an alternative to such a method for applying an oil agent, there is a method in which a predetermined amount of oil agent previously measured by a measuring pump is adhered to a traveling yarn using a guide. A number of proposals have been made with increasing speed.

For example, as shown in FIG. 4, a running yarn connecting surface is provided below an oil discharge section, and a yarn amplitude regulating wall is provided on both sides (Japanese Patent Laid-Open No. 59-116404), as shown in FIG. Having a thread passage groove extending upwardly and downwardly, and having two thread connecting surfaces disposed above and below the thread passage groove to apply an oil agent (Japanese Utility Model Publication No. 63-63). No. 15339).

However, when applied to the production of industrial polyester fibers having a spinning take-up speed of 2000 m / min or more and a strength of 9 g / d or more in the conventional guide lubrication method, there are the following disadvantages. .

That is, in the type of FIG. 4 in which the yarn contacting with the traveling yarn is in surface contact and the lateral width regulating wall of the traveling yarn is provided, the uniformity of oil adhesion to the high-speed traveling yarn is almost better as compared with the oiling roller system. However, the nozzle structure having the surface contact and the regulating wall has a problem that the running yarn is scratched, and the yarn forming property is impaired because the oil agent adheres to the nozzle. Although the type shown in FIG. 5 has a slight effect of reducing oil spots by forming two nozzles in series, it is difficult to say that it has a regulating wall.

When a fixed amount of oil is applied to the traveling yarn via the nozzle, increasing the contact time between the yarn and the nozzle is an important requirement from the viewpoint of uniform adhesion of the oil. The possibility of damage to the running yarn due to flaws or abrasion of the yarn portion becomes extremely high.

Also, providing the traveling yarn lateral width regulating walls on both sides of the nozzle is correct in that the entire amount of the discharged oil is applied to the traveling yarn, but the actual situation is not so simple. In other words, the spinning tension of the high-speed multifilament yarn is at most 0.
The traveling yarn in the nozzle yarn joining portion constantly fluctuates due to the unevenness of the cooling air blowing linear velocity and the effect of the yarn accompanying flow. If the fluctuation causes the high-speed running multifilament yarn to be slightly deviated in any one of the width-restricting guides provided on the nozzle, a part of the entire running single yarn cannot contact the nozzle oil film surface and no oil adheres at all. If not, problems will arise. This is a spinning take-off speed of 2000m /
This is a fatal drawback in terms of productivity in the production of industrial polyester fibers having a high speed of more than 10 minutes and a high strength of 9 g / d or more.

[Means for Solving the Problems] The present invention has been made to solve the above problems.

In other words, the present invention applies a fixed amount of an oil agent to the running multifilament yarn having a single fiber fineness not fine denier through an oil agent application nozzle. A curved portion without a barrier or a guide body that regulates the width of the running yarn in the lateral direction and natural fluctuation, and a portion perpendicular to the running direction of the yarn formed near the upstream of the yarn joining portion. Using an oil dispensing nozzle configured to include an oil dispensing slit extending in the direction, and setting the discharge slit position so that the opening width thereof is substantially the same as the natural spread width of the traveling multifilament yarn. An oil agent applying method characterized by applying an oil agent by bringing a thread into contact with a portion.

[Effect] In order to uniformly apply the lubricant to the running yarn, it is necessary to uniformly apply to all the single yarns (all single fibers) constituting the multifilament, and the measured oil is applied to the running yarn. It is hard to say that it is true that a uniform oil agent is provided.

The material balance between the supplied oil amount (A) and the traveling yarn adhering oil amount (B) may be A = B + C (C is the amount of the oil adhering from the nozzle body without adhering to the traveling yarn).

In short, it is extremely important that all the single yarns of the multifilament are not overlapped with each other on the nozzle contact surface, but have a natural spread and all of them touch the nozzle to apply the oil agent. No guide body should be provided to control the natural fluctuation of the filament on the nozzle, and the slit width (D) for discharging the dispersant at the nozzle and the maximum spread width including the natural fluctuation of the traveling multifilament at the nozzle ( The relationship with E) is D ≒ E
It is difficult to apply uniformly to the single yarns constituting the multifilament when the size is reduced, and when the size is increased, the amount of the dispersant is increased unnecessarily, and the uniform application is not necessarily performed. Not exclusively.

If all the single yarns constituting the multifilament come into contact with the nozzle and the dispersant is applied, even if a dispersant drops from the nozzle body, there is no problem from the viewpoint of uniform adhesion, and the dripping oil is collected. If they are reused, there is no problem in terms of cost.

Hereinafter, the present invention will be described with reference to the drawings. 1 is a process explanatory view including a schematic cross section of an oil agent applying nozzle suitable for carrying out the present invention, FIG. 2 is a perspective view of the oil agent applying nozzle shown in FIG. 1, and FIG. 3 is a schematic diagram of FIG. It is a top view.

In FIG. 1, reference numeral 1 denotes an oil applying nozzle, which comprises a main body 2, an upper cover 3, and a slit plate 4 sandwiched between the main body 2 and the upper cover 3. The slit plate 4 is a plate-like body whose front center is cut into a shape of a fish tail or a coat hanger, and is sandwiched between the main body 2 and the upper lid 3 as described above. The cut portion 5 forms a dispensing agent slit 6 for the oil agent.

As described above, the slit 6 is preferably changed by changing the slit plate 4 so that the most suitable one can be selected for the brand, type, or operating condition. However, it is preferable to form grooves directly in the main body 2 or the top cover 3 or both. Alternatively, it may be formed.

The front surface of the main body 2 is formed with a connecting portion 8 which smoothly curves along the running direction of the yarn y and extends flatly in the lateral direction, and there is no other member for regulating the yarn y. .
An outlet opening 7 of the slit 6 is located near the upstream (upper) side of the yarn joining portion 8, and the opening width thereof is set to be substantially equal to the natural spread width of the traveling multifilament yarn.

The main body 2 is provided with an oil supply hole 9 corresponding to a rear end portion where the width of the slit 6 is narrowest so as to communicate with the rear end portion. The oil supplied to enters the slit 6 from here,
It is dispersed and discharged from the outlet opening 7 to the front surface of the main body. The discharged oil agent is applied to the yarn y traveling on the yarn joining portion 8 while flowing down the front curved portion 2 '.

Reference numeral 13 denotes a tray for collecting the oil agent flowing down from the curved portion.

Here, the natural spread width of the multifilament yarn refers to the maximum spread width in the case where a guide or the like for regulating the yarn from spinning of the yarn to the take-up roller is not provided as described above. The oil agent application nozzle may be arranged so that the slit opening width matches the slit opening width. in this case,
It is preferable that the oil agent application nozzle and / or the take-up roller be provided so as to be vertically movable or freely adjustable, so that fine adjustment can be appropriately performed according to conditions.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Fixed polymerization high [η] polyester chip ([η] _C = 1.
05) is melted with an extruder, discharged at 833 g / min from a spinneret having a discharge hole of 250H, cooled in a spinning cylinder, applied with an oil agent, taken up at a speed of 2200 m / min, and wound up once After stretching in two stages without heat and subjecting to a heat treatment at 210 ° C. for 0.2 seconds, a pressure / air entanglement treatment was applied through a cooling roller, and a speed of 50 ° C.
A drawn yarn having a winding fineness of 1500 denier and a strength of 8.8 g / d was obtained at 00 m / min.

The oil was applied using the oil applying nozzle shown in Fig. 1 and the oil was applied under the spinning tension of 0.26 g / d between the outlet of the spinning cylinder and the take-off roller 2 m below the spinning cylinder. .

Further, the yarn width at the yarn joining portion of the oil agent application nozzle was adjusted by changing the nozzle position starting from the exit of the spinning cylinder.

That is, when the yarn width was increased, the nozzle was moved closer to the outlet of the oil agent application nozzle, and when the yarn width was reduced, the nozzle was moved away from the outlet of the spinneret. The results are shown in Table 1. Table 2 shows the composition of the oil agent used in this example.

In Table 1, the fiber oil agent adhesion amount, oil agent adhesion spots, and coloring spots were measured by the following methods.

(1) Fiber oil agent adhesion amount (OPU) Sample amount: 10 g (yarn length = 60 m at 1500 de) Drying: 105 ° C × 40 minutes Degreasing: 25 ° C × 3 minutes in a 5% neutral detergent bath for ultrasonic degreasing OPU: (W ₁ −W ₂ ) / W ₁ × 100 (%) W ₁ = Weight before degreasing W ₂ = Weight after degreasing Weighing = Shimadzu Automatic Balance (2) Spots of oil adhesion The standard deviation (σ) was calculated 20 times continuously.

(3) Coloring spots An oil solution obtained by dissolving and coloring a dye (Diavesin-Red K) at a concentration of 5% was attached to the fiber surface via a nozzle and knitted, and color spots were visually determined.

In Table 1, in Experiments Nos. 1 to 3 and 5 (Comparative Example), there were many spots of oil agent attachment and coloring spots, and both thread breakage and fluff during yarn production were poor. In each of the examples, the spots of oil agent adhesion and spots of coloring were small, and both the thread breakage and the fluff at the time of spinning were good.

[Effects of the Invention] As described above, the present invention has a remarkable effect that it is extremely effective for improving the operability of industrial high-strength polyester fibers produced at high speed.

[Brief description of the drawings]

1 is a process explanatory view including a schematic cross section of an oil agent applying nozzle suitable for carrying out the present invention, FIG. 2 is a perspective view of the oil agent applying nozzle shown in FIG. 1, and FIG. 3 is a schematic plan view of FIG. Figure, 4th
5 are explanatory diagrams showing examples of the related art. 1 ... oil supply head 6 ... slit 7 ... slit outlet opening 8 ... threading part

Continuation of the front page (56) References JP-A-63-135977 (JP, U) JP-A-59-466 (JP, U) JP-A 60-117,871 (JP, U)

Claims (1)

(57) [Claims] When a fixed amount of oil is applied to a traveling multifilament yarn having a fineness of a single fiber of not fine denier via an oil applying nozzle, the oil is caused to flow down in a planar manner and to be flatly tangled. A curved portion without a barrier or a guide body that regulates the width of the running yarn in the lateral direction and natural fluctuation, and a portion perpendicular to the running direction of the yarn formed near the upstream of the yarn joining portion. Using an oil dispensing nozzle configured to include an oil dispensing slit extending in the direction, and setting the discharge slit position so that the opening width thereof is substantially the same as the natural spread width of the traveling multifilament yarn. A method for applying an oil agent, wherein the oil agent is applied by bringing a yarn into contact with a portion to travel.