KR100284773B1 - Polyester low shrinkage water repellent yarn and manufacturing method - Google Patents

Abstract

The present invention is to produce a polyester low shrinkage water repellent yarn having excellent physical properties by the direct radiation drawing (DSD) method with improved productivity, to impart a water repellent agent in the quenching zone first, and to give a second at the time of quenching after quenching According to this, the polyester low-shrink water-repellent yarn with excellent water repellency is produced without the problems of frequent cattle, cutting, operation deterioration, water-repellent deterioration, etc. occurring during the production of polyester low-shrink water repellent yarn by the DSD method. You can do it.

Description

Polyester low shrinkage water repellent and its manufacturing method

The present invention relates to a water-repellent polyester yarn, and more specifically, to low water-repellent polyester yarn having improved water repellency and water repellency and uniform water repellency, and such yarns by direct spinning drawing (DSD) The present invention relates to a method for manufacturing with high productivity without problems such as deterioration of operability and water repellency.

Generally, the method of manufacturing low shrinkage water repellent yarn is roughly classified into a DSD method and a warp drawing (W / D) method. In terms of productivity, the DSD method is widely used, but in general, the production of low shrinkage water repellent by the W / D method is also widely applied.

The DSD method is a process of direct spinning which is connected to spinning and drawing. The spinning, drawing and relaxation process is a method of manufacturing yarn by drawing and relaxing the unstretched yarn spun under the confinement of the spinning section. It is connected as a process.

In the W / D method, the undrawn yarn (UDY) manufacturing process and the stretching process are separated, and after the undrawn yarn is manufactured, the yarn is manufactured through the stretching and relaxation process in a transverse stretching machine.

The manufacturing method of the low shrinkage water repellent yarn using the conventional DSD method expresses the water repellency by applying the spinning emulsion-water repellent liquid mixture to the yarn using an oil roller to the spun yarn that has been spun and then stretched and relaxed. The method of making is well known.

On the other hand, a method of manufacturing a low shrinkage water repellent yarn using the W / D method is as follows: ① Method of imparting a water repellent solution to the yarn using a roll coater during the stretching process; It is well known to mix water repellent with and to give water repellency.

When manufacturing a low shrinkage water repellent yarn by the conventional DSD method, the water-repellent fluid is used in combination with an oil agent, so that the stretching roller is caused by contamination due to adhesion of the residue of water-repellent fluid and tar generated by heat curing thereof. The appearance (deluxe) worsens due to frequent cutting and the occurrence of the cows, there is a disadvantage that the productivity is lowered. In addition, in order to express the water-repellent performance required for the yarn, the content of the water-repellent agent should be increased. In such a case, the occurrence frequency of cattle and cuttings is increased, and operation efficiency is considerably reduced, which makes production difficult. It is difficult to do. As such, the conventional low shrinkage water repellent manufacturing method by the DSD method has a disadvantage in that the productivity and the water repellency are considerably lowered.

On the other hand, the low shrinkage water-repellent manufacturing method of the above-described W / D method is because the winding speed (winding) is firstly slow productivity is significantly lower than the DSD method. Examples of the method of treating the water repellent agent in the W / D method include a method of manufacturing a water repellent yarn by applying an emulsion and a water repellent liquid in a non-drawn yarn manufacturing process, and then performing a heat treatment in the stretching step, and a process of transversely stretching the undrawn yarn. The method of manufacturing a water-repellent yarn through the heat processing apparatus immediately after apply | coating a water repellent liquid using a roller in a specific site | part is mentioned. In the latter case, since the heat treatment time is short, the water repellent is dropped due to the interlacer and guide contact, so that the water repellency is lowered and the durability is poor. A similar problem occurs with the DSD method.

As described above, in manufacturing the low shrinkage water repellent yarn by the conventional DSD method or the W / D method, there are many disadvantages in operation, water repellency, durability and uniformity of the water repellent performance.

Accordingly, the present invention provides a polyester low shrinkage water repellent yarn having excellent water repellency, durability and uniformity of water repellency in view of the problems of the prior art, and a method for producing a water repellent yarn having such characteristics with excellent operability and productivity. Let's make it a task.

1 is a view schematically showing the installation position of the water repellent treatment means and the post-water repellent treatment means in the apparatus for producing a polyester low shrink water-repellent yarn according to a preferred embodiment of the present invention

Figure 2 is a schematic enlarged view for showing the installation position of the nozzle constituting the selective water treatment means in the apparatus of Figure 1

※ Explanation of code for main part of drawing ※

1: detention 2: quenching chamber

3a: 1st water repellent spray nozzle 3b: 2nd water repellent spray nozzle

4a: 1st oil roller 4b: 2nd oil roller

According to the present invention to solve the above problems in the production of polyester low-shrinkage water-repellent yarn by the DSD method, the water-repellent agent is firstly given in the quenching zone, and the second method at the time of collecting after quenching in the usual manner The manufacturing method of the polyester low shrinkage water repellent yarn provided is provided.

In addition, according to the present invention, in the manufacturing apparatus of the polyester low shrinkage water repellent for implementing the above method, inside the first water repellent spray nozzle and the filament thread spraying the water repellent agent from the outside of the filament thread inside the quenching chamber to the water repellent imparting means A low water repellent treatment means comprising a second water repellent spray nozzle for spraying a water repellent agent to the outside in the process, and a post-water repellent treatment means for imparting a water repellent in the process of focusing the filament yarn after the quenching chamber. A manufacturing apparatus of the investigation is provided.

In addition, according to the present invention, the polyester is produced by direct radiation stretching (DSD), the strength is more than 7.5 g / d, the water repellency is 70 or less, the cut elongation is 25% or less, dry heat shrinkage is 5% or less Low shrink water repellent is provided.

Hereinafter, the present invention will be described in more detail.

The method for producing a polyester low shrinkage water repellent yarn of the present invention has a main feature distinguishing it from the prior art in that it adds a primary water repellent treatment step of imparting a water repellent to a polymer at high temperature immediately after spinning.

More specifically, according to the present production method, a water repellent agent is applied first in the quenching region, and secondly at the time of concentration after quenching by a conventional method. It is common to provide the emulsion with the second water repellent.

1 and 2 are schematically illustrated one example of a preferred device implementation of the present invention for imparting a water repellent in the quenching region. According to this, the first water repellent spray nozzle 3a and the second water repellent spray nozzle (3) are heated on the hot filament thread when the polymer (filament thread) spun through the mold 1 is cooled while passing through the quenching chamber 2 of the lower part of the cap. A water repellent sprayed by the water repellent treatment means 3 having 3b) is given. The water repellent is sprayed inward from the filament thread in the first water repellent spray nozzle 3a, and sprayed from the inside of the filament thread in the second water repellent spray nozzle 3b to the outside.

In the apparatus shown in the drawing, the process of imparting a water repellent using the water repellent treatment means 3 is illustrated by applying a closed type quenching chamber which is not exposed to the outside air, but is irrelevant to the quenching type.

As described above, according to the present invention, uniform water repellent treatment is possible by uniformly dispersing the water repellent liquid by using the water repellent treatment means 3 to the spun unstretched yarn.

The yarn which has been subjected to the water repellent treatment in the quenching chamber is subjected to water repellent treatment in the usual manner in the collecting process after leaving the quenching chamber (in the present invention, since the water repellent treatment is performed after the water repellent treatment is hereinafter referred to as 'post-water repellent treatment'). . For example, as shown in FIG. 1, two stage oil rollers 4a and 4b designed to apply a mixture of water-repellent liquid and an emulsion to the thread can be used as shown in FIG. In this way, the post-water-repellent treatment is performed to the undrawn yarn which is primarily subjected to the water-repellent treatment to make the water-repellent treatment more perfect. The water repellent concentration in the oil rollers 4a and 4b is set in consideration of the concentration of the water repellent liquid imparted by the first water repellent treatment means 3.

As described above, according to the present invention, when the unstretched yarn is spun, the water repellent performance and the water repellent treatment are continuously performed, thereby obtaining a low water repellent yarn having excellent water repellency and uniformity.

That is, by applying the water repellent agent to the spun high temperature non-stretched yarn in the outer direction and the inner direction of the thread using the water repellent treatment means (3), it is possible to give a uniform water repellent agent to the unit filament, the water repellent agent immediately after spinning Due to the high temperature of the unstretched yarns, instantaneous high-temperature heat-seal is achieved, and at the same time, a second water repellent is applied to the unstretched yarns which have been subjected to the first water-repellent treatment through a post-water-repellent treatment to make a more perfect water repellent treatment. By controlling the concentration of the water repellent in the water repellent treatment means and the water repellent treatment means, it is possible to produce a low shrinkage water repellent which not only has excellent water repellency, but also has a uniform water repellency and excellent water repellency durability. In addition, according to the present invention, unlike the conventional DSD water repellent treatment method using only the oil roller, it is easy to control the concentration of the water repellent agent in the post-water repellent treatment means in parallel with the first water repellent treatment and the post-water repellent treatment due to the generation of tar by the water repellent agent on the stretching roller It is possible to produce low shrinkage water-repellent yarns with high productivity because it reduces the amount of cattle and cutting.

In the present invention, any kind of water repellent commonly used in the art may be used as the water repellent. Typically, a fluorocarbon aqueous emulsion containing 70 to 80% of water, 20 to 30% of a fluorocarbon compound, and about 5% of an emulsifier is mainly used. Fluoroalkyl acrylates or fluoroalkyl methacrylates having the following formula are well known as representative examples of the fluorocarbon compound as the main component (active ingredient) imparting water repellent properties to the polyester yarn.

In the formula, Rf is a C4-C8 perfluoroalkyl chain, R is H or CH3.

Features and other advantages of the present invention as described above will become more apparent from the following examples. However, the present invention is not limited by the following examples.

[Examples 1 to 5 and Comparative Examples]

The polyester polymer having an intrinsic viscosity (IV) 1.0 was spun at a rate of 600 m / min at 292 ° C. and subjected to water repellent treatment under various conditions as shown in Table 1 in the quenching zone and the tanning zone. At this time, a water-repellent stock solution in the form of an aqueous emulsion containing 20% or more of a fluorocarbon compound having a C5 or more perfluoroalkyl chain was used.

Thereafter, the mixture was treated and wound under conditions of a draw ratio of 5.4 times / 120 ° C., a heat treatment temperature of 230 ° C., and a relaxation rate of 10% to prepare a polyester low shrink water-repellent yarn of 1,000 denier filaments. The physical properties of the low shrinkage water repellent prepared in each example are measured and shown in Table 2. Shrinkage and water repellency in the properties shown in Table 2 are measured by the following method.

◇ Dry heat shrinkage rate (Sr): Measure the initial length ℓ ₀ of the yarn, measure the length ℓ ₁ after heat shrinkage at 190 ℃ for 15 minutes under no tension and calculate the calculated by the following equation.

◇ Water repellency: After immersing one end of water repellent yarn in dye solution (Miketone Blue FBL 0.5wt%) for 2 hours, measure the height of dye liquid rising from yarn:

-FB: water repellent before friction test,

-FA: water repellent after friction test,

-Friction test: Friction by reciprocating 100 times of water repellent yarn on yarn guide under 70g tension.

◇ Strength and Elongation: Measured by universal testing machine (Instron). Spec gauge length 250 nm, crosshead speed 300 mm / min.

division Water repellent of quenching area Water repellent in tanning area 1st nozzle 2nd nozzle Top oil roller Bottom oil roller Water repellent Spray amount (g / min) Water repellent Spray amount (g / min) Emulsion water repellent concentration Roller speed (rpm) Emulsion water repellent concentration Roller speed (rpm) Example 1 Stock solution 10 Stock solution 10 - 20 - 20 Example 2 Stock solution 5 Stock solution 5 3 20 3 20 Example 3 Stock solution 5 Stock solution 5 5 20 5 20 Example 4 Stock solution 10 Stock solution 10 3 20 3 20 Example 5 Stock solution 10 Stock solution 10 5 20 5 20 Comparative Example 1 - - - - 10 20 10 20

Strength (g / d) Elongation at Break (%) Shrinkage (%) Water repellent performance Rainfall (ea / 10 ⁶ m) Mobility (%) Water repellency degree (mm) Uniformity (mm) FB FA FB FA Example 1 7.8 25.5 4.3 35 37 15 17 2 97 2 to implementation 7.9 23.8 4.5 25 28 13 15 4 96.5 Example 3 7.8 24.5 4.6 18 21 14 15 5 95.7 Example 4 8.0 23.4 4.5 11 15 15 18 8 94.3 Example 5 8.0 24.0 4.8 3 5 11 13 10 93.2 Comparative Example 1 7.8 25 5.0 70 88 47 88 50 83

[Examples 6 to 8]

A low shrinkage water repellent yarn was prepared by applying a water repellent solution under the conditions of Example 4 among the water repellent solution treatment conditions of Table 1 except that the spinning speed, the draw ratio, the heat treatment temperature, and the relaxation rate were changed as shown in Table 3 below. . Physical properties of the prepared low shrinkage water repellent are shown in Table 4 below.

Spinning speed (m / min) Stretch ratio (times) Heat treatment temperature (℃) % Relaxation Example 6 650 5.2 240 9 Example 7 600 5.4 250 8 Example 8 520 5.6 230 10

Strength (g / d) Elongation at Break (%) Shrinkage (%) Water repellent performance Rainfall (ea / 10 ⁶ m) Mobility (%) Water repellency degree (mm) Uniformity (mm) FB FA FB FA Example 6 7.78 25.1 4.2 10 13 9 11 8 94.2 7 to implementation 7.98 22.7 4.1 6 8 7 8 10 93.8 Example 8 8.20 21.3 4.8 9 9 8 10 10 93.5

From the above results, excessive spinning is required to obtain the required level of raw material properties (strength and elongation) at a spinning speed of 500mpm or less, which may lead to deterioration of operability. Not only is it difficult to secure stable fixation, but also the dry heat shrinkage rate is high, so the heat treatment should be performed at a temperature of 200 ° C or higher. In the following cases, it can be seen that it is difficult to manufacture the required low shrink yarn due to the high dry heat shrinkage rate.

As is apparent from the above description, when the water repellent treatment is performed in the quenching zone according to the present invention, problems such as frequent cattle, cutting, deterioration of operation, deterioration in water repellency, etc., which occur during the preparation of the polyester low shrink water repellent by the DSD method It is possible to manufacture a polyester low shrink water-repellent yarn excellent in water repellency without.

Claims (3)

In manufacturing polyester low shrinkage water repellent yarn by direct radiation drawing (DSD) method, the water repellent agent is applied in the quenching zone, or the water repellent agent is firstly applied in the quenching zone, and is secondly applied at the time of collection after winding. Method for producing a polyester low shrinkage water repellent yarn. The polyester low shrinkage foot according to claim 1, wherein imparting a water repellent agent in the quenching zone is performed by spraying a water repellent agent from the inside of the filament yarn to the outside simultaneously with spraying the water repellent agent from the outside of the filament yarn. Manufacturing method of the investigation. In polyester low shrinkage water repellent yarns produced by direct radiation drawing (DSD), the strength is 7.5 g / d or more, the water repellency is 70 or less, the cut elongation is 25% or less, and the dry heat shrinkage is 5% or less. Polyester low shrink water repellent.