KR100846291B1 - Cooling device for polyester filament - Google Patents

Abstract

A cooling device for a polyester filament is provided to manufacture the yarn having the outstanding quality by suppressing the trembling of the yarn through minimizing the airstream interference, and to obtain the excellent dyeing property. A cleaning plate is installed in a cooling zone of the polyester filament spinning cooling device for cooling down a polymer discharged from a spinneret(1). The center part of the cleaning plate is designed to be concavely curved by comparing to both end parts of the cleaning plate. The length of the cleaning plate is formed to be adjustable according to the number of holes of the spinneret and the fineness of a single filament. The length of the cleaning plate is made to be a slide type for enabling to replace the cooling width plate easily and simply, and is adjusted freely. The width of both end parts of the cleaning plate is installed to have 20-30 millimeters distance to the polymer discharged from the spinneret, and to have 35-45 millimeters distance to the center part of the cleaning plate.

Description

Polyester filament spinning chiller {Cooling device for polyester filament}

1 is a view schematically showing that yarn radiated from a spinneret is cooled and wound by a cooling device,

Figure 2 is a rectifying plate of the filament cooling device manufactured according to the present invention, Figure 2a is a perspective view of the rectifying plate, Figure 2b is a plan view of the rectifying plate,

3 is a front view of the rectifying plate of the filament cooling device produced according to the present invention.

* Explanation of symbols for main parts of the drawings

One; Detention 2; station

3; Cooling chamber 4; Lubrication device

5; Gothol Roll1 6; Goya Roll 2

7; Godelol 3 8; Winder

9; Yarn 10; Rectifying plate

101; Transverse

The present invention relates to a polyester filament radial cooling device, and more particularly, to reduce the airflow interference between the cooling station and the polymer in the same cooling discharge unit, and to uniformly control the airflow to the polymer discharged from both ends of the discharge unit. The present invention relates to a polyester filament spinning chiller capable of producing yarns of good quality with minimum fluctuation of yarn because the cooling station can be adjusted without additional equipment cost.

In general, the polyester yarn is produced by discharging the molten polymer from the spinneret, cooled by a cooling wind flowing in a direction perpendicular to the discharge direction, and then drawn and stretched.

By the way, the nonuniformity of cooling in the process of cooling and solidifying a polymer in the general process as mentioned above becomes a cause which produces the physical property and sand-shaped irregularity between each single yarn. Accordingly, in order to solve the above problem, conventionally, as illustrated in FIG. 1, a cooling stop 3, such as a honeycomb or a straight line, is installed on the front of the discharge portion of the cooling wind to maintain uniformity of the cooling airflow.

However, in the cooling stop of the above-mentioned shape, the radial discharge port increases in the same cooling discharge portion, and as the spinning speed increases, the downflow air accompanied by the polymer increases, and the turbulence of the airflow increases due to the interference with the cooling wind. do. In addition, since the area of the cooling air blower increases, airflow decreases at both ends. As a result, the interference with the downdraft is further increased, and the yarns discharged from both ends have a problem in that cross-sectional nonuniformity and dyeing nonuniformity increase.

In addition, according to the single yarn fineness and the number of filaments, if the stop of the appropriate length is not given, there is a disadvantage that the physical properties and workability is deteriorated by generating a floating flow on the lower point of the freezing point.

Accordingly, the present inventors have found that the conventional problems can be solved by providing a rectifying plate in which a horizontal plate having a specific shape is detachably arranged as a result of intensive studies to solve the above conventional problems. To complete.

An object of the present invention is to solve the above-mentioned conventional problems to reduce the airflow interference between the cooling stop and the polymer in the same cooling discharge unit to uniformly control the air flow to the polymer discharged from both ends of the discharge unit, and also separate equipment It is an object of the present invention to provide a polyester filament spinning chiller capable of producing yarns of good quality with minimum fluctuation of yarn by adjusting the length of the cooling station without cost.

Polyester filament spinning cooling apparatus of the present invention for achieving the above object;

A rectifying plate is provided in a cooling zone for cooling the polymer discharged from the spinneret, and the rectifying plate is designed such that its central portion is concavely recessed inward with respect to both ends thereof, and the length of the rectifying plate is an odd number of spinnerets. And characterized in that configured to be adjusted according to the single yarn fineness.

According to another configuration of the present invention, the length of the rectifying plate is characterized in that it is configured to be freely adjusted to be produced in a slide type that can be freely replaced the cooling horizontal plate.

According to another configuration of the present invention, the width of both ends of the rectifying plate is designed to be 20 to 30mm away from the polymer discharged from the spinneret, and the central portion is designed to be 35 to 45mm.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view schematically showing that yarn spun from a spinneret is cooled and wound by a cooling device, FIG. 2 is a perspective view and a plan view of a rectifying plate of a filament cooling device manufactured according to the present invention, and FIG. A front view of the rectifying plate of the filament cooling device produced according to the present invention.

In general, the production of polyester yarns is performed by spinning the molten polymer containing titanium dioxide at a constant spinning temperature through the spinneret 1 as shown in FIG. Cooled and solidified by a cooling device consisting of, after passing through the lubrication device (4) is given the temperature required for stretching in gourd roll 1 (5) and gourd roll 2 (6), drawn and then gourd roll 3 After heat treatment at (7), it is wound by a winding machine (8) and produced into yarn 9 which is a stretched yarn.

By the way, in the production process of the yarn described above, as the number of spinnerets increases, the difference becomes larger in the cooling air emitted to the polymer at both ends and the center portion. In detail, wind speed is slow in the vicinity of both ends and is fast in the center part. This phenomenon occurs because when the number of strands of the radiated filament increases, the flow of the fluid becomes poor and the speed difference widens. In addition, the downdraft generated by the discharge of the polymer generates vortices by encountering non-uniform cooling air, and is sometimes changed to the updraft by the rectifying plate or the wall at both ends of the cooling zone.

By the way, the vortex phenomenon thus generated could be controlled by making the width of both ends of the rectifying plate longer than the center portion. As the width of both ends increases, the wind speed deviation in the space between the rectifying plate and the polymer becomes similar regardless of the position in the transverse direction, and the vortex phenomenon caused by the speed difference is reduced.

Therefore, in the present invention configured as described above, the width of both ends of the rectifying plate is designed so that the distance from the polymer discharged from the spinneret is 20 to 30 mm, and the central part is designed to be 35 to 45 mm. That is, the space between the rectifying plate and the polymer is designed to be 20 to 45mm, and the length difference between the both ends and the center part (that is, D in FIG. 2) is about 15 mm, thereby minimizing the speed difference between the center part and both ends. there was.

If the space between the rectifying plate and the polymer is larger than the above range, the cooling air is disturbed by the interference with the downdraft. If the space is small, the cooling difference is generated between the filament located near the rectifying plate and the filament located far away. It is not desirable to provide a cause.

In addition, in the present invention, the horizontal plate 101 of the cooling device rectifying plate 10 can be freely replaced as shown in FIG. 3 so that the single yarn fineness is less than 1 denier, as well as a relatively solid point. Low single yarns, which have to maintain high tension in spinning, can be applied to postures of 5 denier or more without additional equipment.

In other words, in the case of poise sand having a single yarn fineness of more than 5 deniers in general, the wind speed is relatively large in order to increase the cooling efficiency, but this has the disadvantage of causing dyeing abnormalities by increasing the radial yarn flow and deteriorating workability. . Therefore, in the present invention, in order to solve this disadvantage, the length of the longitudinal direction can be adjusted by detaching and adjusting the horizontal plate 101 of the rectifying plate 101 compared to the microfiber in any number, thereby maintaining the wind force by It is possible to suppress private flow due to the increase.

The polyester filament spinning cooling apparatus of the present invention configured as described above has a central portion by cooling a rectifying plate designed so that its central portion is recessed inwardly as opposed to both ends in a cooling zone for cooling the polymer discharged from the spinneret. The speed difference between both ends can be minimized, and thus, the airflow can be uniformly controlled on the polymer discharged from both ends of the discharge part by reducing the airflow interference between the cooling rectifying plate and the polymer in the same cooling discharge part, and thus the workability is good. It is possible to produce yarns with good cross-sectional variation and uniformity. In addition, in the present invention, it is not necessary to manufacture individual rectifying plates having different lengths according to the number of polymer strands and single yarn fineness by manufacturing the slide type to replace the horizontal plates of the rectifying plate, thereby reducing the cost and time associated with manufacturing and replacing the equipment. It became possible.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited, and the properties in the following Examples and Comparative Examples were measured or evaluated in the following manner.

(1) Spinning workability was evaluated by full bobbin rate.

○: 95% or more, △: 90% or more, less than 95%, ×: less than 90%

(2) The section variation rate was evaluated as the ratio of the deviation to the average cross-sectional area, and the analyzer used the OPTIPOT-2 Model and the Image Analyzer manufactured by BRIGHT INSTRUMENT COMPANY.

(3) The homogenization system was performed using USTER Tester III

V: 100 m / min, t: 1.0 min, P: 1.5 bar, Yarn tension: 12.5% conditions were analyzed.

Examples 1 to 3

Polyethylene terephthalate having an intrinsic viscosity (η) = 0.652 having a titanium dioxide content of 0.4% by weight was spun at a spinning temperature of 285 ° C. The spinning yarn was cooled to a wind speed of 24 m / min using a rectifying plate with D = 15 as shown in FIG. The solidified yarn gives the temperature required for drawing at 81 ° C. in the roll roll 1 and the roll roll 2 in the process of FIG. 1, stretches the film from 1.55 times to 1.75 times, and then heat-treats it at 123 ° C. at the roll roll 3 to 5,000 m / min. It wound up and obtained the stretched yarn. The physical properties and properties of the obtained stretched yarn were measured and shown in Table 1.

division Number of strands Single Sand Island (de / f) D (mm) Cooling cabinet length (mm) Elongation ratio Workability Sectional variation rate (%) Uniformity (%) Center Both ends Center Both ends Example 1 72 0.69 15 300 1.75 ○ 6.8 7.1 0.98 0.99 Example 2 144 0.50 15 300 1.55 ○ 7.4 7.3 1.01 0.98 Example 3 204 0.50 15 300 1.55 △ 7.5 7.5 1.09 1.12

Comparative Examples 1 to 3

Polyethylene terephthalate having an intrinsic viscosity (η) = 0.652 having a titanium dioxide content of 0.4% by weight was spun at a spinning temperature of 285 ° C. The spinning yarn was cooled to a wind speed of 24 m / min using a rectifier plate with D = 0. In the process of Fig. 1, the solidified yarn gives the temperature required for drawing at 81 ° C. in the roll roll 1 and the roll roll 2, stretched at 1.55 times to 1.75 times, and then heat-treated at roll roll 3 at 123 ° C., and then speeded at 5,000 m / min. It wound up and obtained the stretched yarn. The physical properties and properties of the resulting stretched yarn were measured and shown in Table 2 below.

Examples 4-7

Polyethylene terephthalate having an intrinsic viscosity (η) = 0.652 having a titanium dioxide content of 0.4% by weight was spun at a spinning temperature of 285 ° C. The spinning yarn was cooled to a wind speed of 40 m / min by adjusting the horizontal plate to 300 mm and 600 mm, respectively, as shown in Table 3 using a rectifying plate of D = 15 as shown in FIG. In the process shown in Fig. 1, the solidified yarn gives the temperature required for drawing at 90 ° C. in the roll roll 1 and the roll roll 2, stretched at 1.85 times, heat-treated at roll roll 3 at 130 ° C., and wound up at 5,000 m / min. A drawing company was obtained. The physical properties and properties of the obtained stretched yarn were measured and shown in Table 3 below.

Comparative Examples 4 to 7

Polyethylene terephthalate having an intrinsic viscosity (η) = 0.652 having a titanium dioxide content of 0.4% by weight was spun at a spinning temperature of 285 ° C. The spun yarn was cooled at a wind speed of 40 m / min using a rectifier plate having a diameter of D = 0 and a rectifier plate of 300 mm and 600 mm, respectively, as shown in Table 4 below. In the process shown in Fig. 1, the solidified yarn gives the temperature required for drawing at 90 ° C. in the roll roll 1 and the roll roll 2, stretched at 1.85 times, heat-treated at roll roll 3 at 130 ° C., and wound up at 5,000 m / min. A drawing company was obtained. The physical properties and properties of the resulting stretched yarn were measured and shown in Table 4 below.

The polyester filament radial cooling apparatus of the present invention configured as described above can minimize the speed difference between the cooling wind in the center and both ends by installing and cooling a rectifying plate having a specific shape. By reducing the interference of airflow between the polymers, it is possible to control the airflow uniformly to the polymer discharged from both ends of the discharge, thus producing yarns with good workability regardless of the number and number of strands of polyester yarn being radiated. It has excellent fluctuation rate and uniformity, and enables to produce yarn with good dyeability.

Claims (3)

In polyester filament spinning chiller, The cooling device includes a rectifying plate installed in a cooling zone for cooling the polymer discharged from the spinneret, The central portion of the rectifying plate is designed to be concavely recessed inward relative to both ends, the length of the rectifying plate is characterized in that the filament polyester filament radiation cooling device is configured to be adjusted according to the odd number of fine yarns. The method of claim 1, wherein the length of the rectifying plate is a polyester filament spinning cooling apparatus, characterized in that configured to be freely adjusted by the sliding type that can be freely replaced the cooling horizontal plate. The apparatus of claim 1, wherein the width of both ends of the rectifying plate is 20 to 30 mm from the polymer discharged from the spinneret, and 35 to 45 mm from the center.

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