KR100464457B1 - Manufacturing method of polyester low shrinkage water repellent - Google Patents

Abstract

The present invention relates to a method for producing a polyester low shrink water-repellent yarn, the manufacturing method of the present invention by applying a water-repellent liquid during the stretching of the unstretched yarn by the lateral stretch method, to produce a polyester water repellent yarn, roll coater (RC ) And the oil jet (OJ) is used to apply water repellent liquid in two stages in succession, and the heat-treated yarn is coated with instantaneous high temperature heat treatment means (HA). By using this method, the water repellent solution is uniformly applied and the adhesion of the water repellent agent is enhanced, so that the water repellent performance is excellent and there is almost no variation and the shrinkage rate in the raw material properties is very low. .

Description

Manufacturing method of polyester low shrinkage water repellent

The present invention relates to a method for producing a polyester yarn, and more particularly to a method for producing a polyester low shrink water-repellent yarn excellent in durability and excellent water repellency.

Conventional methods for producing water repellent yarns include direct spinning and drawing (hereinafter referred to as "DSD method") and lateral stretches to laterally stretch undrawn yarn (War drawing: "W / D method"). Can be classified into two types.

The most commonly used method is the W / D method, and some of the DSD methods are also applied. In the W / D method, the spinning process and the stretching process are separated. First, undrawn yarn is manufactured, and then a yarn is manufactured by giving a draw ratio and relaxation of a certain ratio in a transverse stretching machine.

Methods of treating the water repellent agent in the W / D method include 1) applying an emulsion and a water repellent liquid in the undrawn yarn manufacturing process, and then performing heat treatment in the stretching step to produce a water repellent yarn; 2) a process of transversely stretching the undrawn yarn. In the specific part, there is a method for producing a water repellent while passing through the heat treatment apparatus immediately after applying the water repellent using a roller.

In the case of manufacturing a water repellent yarn by the conventional DSD method, the oil and water repellent yarn are mixed and treated to the yarn, and then the water repellent is fixed to the yarn by the direct heat treatment method in the stretching roller (G / R) during the stretching process. Due to the high pollution of R, workability is reduced due to the occurrence of cattle and frequent cutting. In addition, in certain parts of the yarn that are not in direct contact with the G / R, the seizure of the water repellent is unstable, resulting in problems such as dropping of the water repellent, lack of water repellency and non-uniformity of the yarn in the post-process, making it difficult to obtain uniform physical properties.

In the method of manufacturing a water-repellent yarn by the W / D method, in the case of the method 1), like the DSD method, in the process of stretching the unstretched yarn in the G / R, the appearance of the yarn may be damaged due to the contamination of G / R In the case of the method 2), the provision of the water repellent is non-uniform, and the heat repellent is incomplete and causes dropping of the water repellent, resulting in poor water repellency.

As described above, the DSD method for manufacturing a water repellent by mixing a water repellent agent and an oil agent in the prior art, and the W / D method for manufacturing a water repellent agent by a non-tactile heat treatment method after imparting a water repellent agent during the non-stretched yarn manufacturing process and the stretching process, There are many problems such as non-uniformity of water repellency, and there is an increasing demand for a method for producing a water repellent which is excellent in water repellency and expresses uniform water repellency.

Accordingly, an object of the present invention is to provide a polyester low shrinkage water repellent yarn having excellent water repellency and low uniformity and shrinkage property in view of the above-mentioned problems of the prior art.

According to the present invention that solved the above problems, in the method of producing a polyester water repellent by applying a water repellent during stretching the undrawn yarn by the lateral stretching method, 2 to apply a water repellent using a roll coater and an oil jet However, there is provided a method for producing a polyester low shrinkage water repellent yarn, characterized in that the yarn to which the water repellent solution is applied is heat-treated with an instantaneous high temperature heat treatment means after a continuous water repellent solution application process.

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

The improved configuration of the present invention is to apply the water jet to the stretched yarn uniformly in two stages with the oil jet and the roll coater, which is a water repellent liquid application means, and to apply the water repellent agent instantaneously to improve the durability High temperature heat treatment.

In Figure 1 illustrating an example of a preferred embodiment of the present invention, a water repellent is applied between yarns between the third gourd roller 23 and the third oven 33, and the order of application is followed by the oil coat OJ followed by the roll coater ( RC is shown in the order. However, the present invention is not limited thereto, and the water repellent liquid application may be performed in the reverse order, and the two-stage continuous water repellent liquid application may be, for example, the second gourd roller 22 and the first high temperature oven ( 31) may be performed.

As described above, the yarn coated with the water repellent in two stages is passed through a high-temperature oven and heat-treated in a non-contact manner, so that the water-repellent is fixed. More preferably, after passing through the oven, it is preferable to pass through the oven. This increases the durability of the water repellent. A preferred example of the instantaneous high temperature heat treatment means HA is an inert gas injection type high temperature heat treatment means.

The temperature of the high temperature heat treatment means HA is suitably set to 150-350 ° C. It is appropriate to install at least one of the installation position and the number of installations between the water repellent liquid applying means and the high temperature oven. As such, the instantaneous high temperature heat treatment may be performed at least once between the water repellent solution applying unit (OJ) RC and the high temperature oven to enhance the heat treatment effect, thereby further improving water repellency and shrinkage.

As described above, when the water-repellent solution is applied in two stages and the instantaneous high temperature heat treatment is performed, excellent low shrinkage property, no variation in physical properties, uniform water repellency, and excellent polyester water-repellent water repellency can be produced. Will be.

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

[Examples 1 to 4 and 6 and Comparative Example 1]

After the unstretched yarn of polyester 5400D / 192fil prepared by spinning under the conditions of Table 1 to the krill (10), the first G / R (21), the second G / R (22), the first high temperature oven (31), second high temperature oven (32), third G / R (23), third high temperature oven (33), fourth high temperature oven (34), fourth G / R (24), winder (40) ) Are sequentially provided, but as shown in Table 4 below, the oil jet (OJ), the roll coater (RC), and the instantaneous high temperature heat treatment means (HA) are drawn at different positions in each of the examples to draw 1000D. A water repellent yarn of / 192 fil was prepared.

In each example, the same aqueous emulsion as shown in Table 2 was used as the water repellent liquid, and the speed and temperature of the first, second, third and fourth rollers and the first, second, third and fourth The temperature and passage speed of the hot oven were also the same. The properties of the prepared water repellent are shown in Table 5 below.

Example 5

A water repellent yarn of 954D / 192fil was prepared by repeating the same procedure as in Example 2 except changing the speed of the fourth G / R to 215 mpm and not installing 2HA. The properties of the prepared water repellent are shown in Table 5 below.

Condition  Intrinsic Viscosity of Polymer Chip (I.V.) 1.0  DEG (ethylene glycol) 1.0  Zone-heater # 1 temperature 284 ℃  Zone-Heater # 2 Temperature 286 ℃  Zone-Heater # 3 Temperature 288 ℃  Zone-Heater # 4 Temperature 290 ℃  Gear Pump Temperature 292 ℃  Spin Block Temperature 292 ℃  ETR's head pressure 2200 psi

Composition of Water Repellent Composition Content (% by weight)  Water repellent 12  Acetic acid 0.2  Isopropyl Alcohol 2.0  water 85.8

Gauze Roller (G / R) Condition (mpm / ℃) High temperature oven Hot air temperature and wind speed (℃ × m / sec) 1st G / R 38/110 1st high temperature oven 240 × 23 2nd G / R 155/120 2nd high temperature oven 250 × 23 3rd G / R 230/30 3rd high temperature oven 260 × 10 4th G / R 205 / cold 4th high temperature oven 260 × 10

division Oil jet Roll coater 1st HA Second HA Example 1 Condition 10 ℓ / hr 20 mpm 350 ℃ - location Between 3G / R and 3rd oven Between oil jet and third oven Between the roll coater and the third oven Not installed Example 2 Condition 10 ℓ / hr 20 mpm 350 ℃ 350 ℃ location Between 3rd G / R and 3rd oven Between oil jet and third oven Between the roll coater and the third oven Between 3rd oven and 4th G / R Example 3 Condition 10 ℓ / hr 20 mpm 350 ℃ - location Between 2nd G / R and 1st oven Between oil jet and first oven Between the roll coater and the first oven Not installed Example 4 Condition 10 ℓ / hr 20 mpm 350 ℃ 350 ℃ location Between 2nd G / R and 1st oven Between oil jet and first oven Between the roll coater and the first oven Between 2nd oven and 3G / R Example 5 Condition 10 ℓ / hr 20 mpm 350 ℃ - location Between 3G / R and 3rd oven Between oil jet and third oven Between the roll coater and the third oven Not installed Example 6 Condition 10 ℓ / hr 20 mpm - - location Between 3rd G / R and 3rd oven Between oil jet and third oven Not installed Not installed Comparative Example 1 Condition - 20 mpm - - location Not installed Between 3rd G / R and 3rd oven Not installed Not installed

division Strength (g / de) Elongation at Break (%) Water repellent Shrinkage ^{* 2} (%) Water repellency ^{* 1} (mm) Standard Deviation Example 1 7.73 25.1 13 2.0 1.8 Example 2 7.75 24.8 7 1.5 1.5 Example 3 7.82 23.7 17 2.5 1.9 Example 4 7.73 24.2 9 1.9 1.6 Example 5 7.81 22.5 7 2.1 2.3 Example 6 7.70 25.0 40 17 2.6 Comparative Example 1 7.80 24.5 52 14.3 2.6

* 1) Water repellency: Measured by the height of the dye on the surface of the dye is immersed in the dye solution to the yarn through the yarn at the water surface. 0.5 wt% Miketon Blue FBL aqueous solution as dye solution.

* 2) Shrinkage rate measurement: 190 ℃ × 15 min, measured under no tension

As can be seen from Table 5, when the oil jet and the roll coater are uniformly coated with the water repellent solution and the instantaneous high temperature heat treatment is carried out, the fixing of the water repellent is enhanced and the water repellent performance is not only excellent. There is little variation and it is possible to manufacture a low shrinkage water repellent yarn with a considerably low shrinkage in yarn properties.

1 is a view schematically showing a process for manufacturing a water repellent yarn according to a preferred embodiment of the present invention.

※ Explanation of main parts in the drawing ※

10... Unstretched creel 21. 1st roller roller group

22. 2nd roller roller group 23. 3rd roller roller group

24. 4th roller roller group 31. First hot oven

32. Second high temperature oven 33. 3rd high temperature oven

34. Fourth high temperature oven 40. Winder

OJ… Oil Jet RC. Roll coater

HA… Instant high temperature heat treatment means

Claims (3)

A method of producing a polyester water repellent yarn by applying a water repellent agent during stretching of an undrawn yarn by the lateral stretching method, wherein a two-stage continuous water repellent liquid is applied using a roll coater (RC) and an oil jet (OJ). Method for producing a polyester low shrinkage water repellent yarn. The method for producing a polyester low shrinkage water repellent yarn according to claim 1, wherein the instantaneous high temperature heat treatment means (HA) is heat-treated after applying the water repellent solution. The method of claim 2, wherein the instantaneous high temperature heat treatment means (HA) has a temperature of 150-350 ° C.