KR0123044B1 - Polyester fiber having excellent color and drape and manufacturing method thereof - Google Patents

Abstract

The hopper(1) contains titanium dioxide of under 1 micro, 7wt weight % for the whole weight, original viscosity, 0.65, polyester chip, pre-dried at 110 degree C, mainly-dried at 140 degree C for 4 hours put in and agitated at speed of 13 per minute. The rotating number is adjusted by the motor for driving(4), in a heat generator set to the temperature of 90 degree C, the chip is delivered. The chip agitated passes through the inlet of material to the head for a extruder of radiator, zone A(9), zone B(10), zone C(11), gear pump(12).

Description

Manufacturing method and apparatus for polyester fiber excellent in color development and drape

1 is a process schematic diagram of the present invention.

2 is a picture of the yarn surface produced in the present invention.

* Explanation of symbols for main parts of the drawings

1 hopper 2 agitator

3: dehumidification hot air generator 4: prime mover

5: raw material air outlet 6: raw material detection sensor

7: raw material inlet 8: extruder body

9: Extruder Zone Part A 10: Extruder Zone Part B

11: Extruder zone part C 12: Gear pump

13: spinneret

The present invention relates to a method for producing a polyester fiber and an apparatus for producing the polyester fiber having better color development and better drape than a conventional polyester fiber, and more specifically, adding and spinning an excess of inorganic particles during polyester polymerization. Prior to this, the hopper with a dehumidifying hot air generator and a stirrer is supplied under a fixed device condition to improve radioactivity, and post-processing to express a microcreator effect on the surface of the elongated stretched yarn. The present invention relates to a method for producing a polyester fiber and an apparatus for producing the same, characterized by improving drape.

Synthetic fibers, in particular, polyester fibers tend to stiffen the fabric during post-processing after weaving, which is a drawback of the original fiber itself, if the weight loss treatment is not performed in post-processing, and there is a problem in that the dyeing of the dye at a high concentration is insufficient when dyeing the fabric. In order to solve the above problems and develop high quality and high sensitivity materials, a method of appropriately adding an additive during synthesis or compounding has been proposed in order to achieve diversification and quality of polyester. For example, in order to produce polyester filaments having excellent drape and dyeing properties, which are not obtained from conventional polyester fibers, polyester copolymers containing inorganic particles having a high specific gravity such as titanium dioxide, barium sulfate, calcium carbonate, etc. in the polyester copolymer are prepared. Alkaline-reduced filament yarns produced by spinning chips obtained by mixing in a range of 2wt% with respect to water to express microcrater effect on the surface of the fabric have been known to express excellent color and drape on the final fabric. , Inorganic particulates such as titanium dioxide, barium sulfate, calcium carbonate, etc., which have a relatively high specific gravity among inorganic fine particles, are added into ethylene glycol during polymerization, and the fine particles are compounded and then directly kneaded with inorganic fine particles to pelletize them. How to Has been proposed.

Generally, in the case of a polyester chip, the melt viscosity is measured at 285 ° C. under 100 Red / Sec, and the melt viscosity is about 2,500 to 3,000 poise. The melt viscosity is less than about 2 wt% of inorganic fine particles in the polyester chip. Is about 3,700 ~ 4,300 poise, so there is no big problem in the sacrifice process. However, in the case of resin containing inorganic particles in excess of 3wt%, the melt viscosity is about 5,000 ~ 10,000 poise, and the chips containing 5wt ~ 10wt% inorganic fine particles are rapidly increasing the melt viscosity and higher hardness than ordinary chips at room temperature. When the chip is inserted into the supply portion of the extruder, the torque (shear input) is sharply increased and the radioactivity is poor compared to other chips.

In other words, when the chips containing less than about 2wt% of inorganic fine particles are prepared, the melt viscosity is slightly higher than that of general polyester chips, and there is no problem in the weaving process, but in the case of chips containing more than 3wt% of inorganic particles Unlike ordinary polyester chips, it has a big impact on radioactivity. That is, since the increase in the melt viscosity increases rapidly as the content of the inorganic particles increases, it is impossible to make a sacrifice in the existing equipment, and the supply of raw material chips is poor, so that uniform fineness cannot be obtained during spinning. It becomes a cause of deterioration of workability and efficiency.

Accordingly, an object of the present invention is to provide a polyester fiber with a high amount of inorganic fine particles at the time of synthesis, excellent in radioactivity and low cost without generating oblique lines, and improving color development and drape. have.

In order to achieve the above object as well as another object that can be easily expressed in the present invention in the production of polyester yarns, by constantly supplying polyester chips through a hopper with a dehumidifying hot air generator and agitator in the spinning step It was possible to obtain polyester fibers having excellent color development and drape properties by improving the radioactivity and post-processing the prepared stretched yarn to express microcreetta effect on the yarn surface.

The present invention will be described in more detail as follows.

1 is a process schematic diagram of the present invention, and FIG. 2 is a yarn surface photograph of the present invention.

The polyester fiber manufacturing apparatus of the present invention is a known polyester fiber manufacturing apparatus comprising: a polyester chip stirrer which is rotated by an agitator blade driving motor (4) inside a hopper (1) for supplying a polyester chip for spinning. (2) and a raw material detecting sensor 6 for driving the prime mover 4 and the dehumidifying hot air generator 3 by sensing the presence of the raw material, and a dehumidifying hot air generator 3 for drying the raw material, that is, the polyester chip. have. As shown in FIG. 1, the hopper 1 contains less than 1 micron of titanium dioxide, based on 7 wt% of the total weight of the polymer, has an intrinsic viscosity of 0.65, preliminary drying at 110 ° C, and main drying at 140 ° C for 4 hours. The dried polyester chip is charged and the speed of the stirrer 2 is stirred at 13 times per minute. At this time, the rotation speed is adjusted by the driving prime mover 4 which returns the stirrer 2. In addition, the chip is supplied in a state where the temperature of the dehumidifying hot air generator 6 is set at 90 ° C, and the stirred chip passes through the raw material inlet, and the extruder zone A zone (9) zone and B section of the spinning device are supplied. 10, passing through the zone C portion 11 gear pump 12, the spin block temperature at this time is 240 ℃, 250 ℃, 270 ℃, 275 ℃, 285 ℃ respectively spinning rate 1500m / min ~ 4500m Emits at / min The load on the extruder of the manufactured spinning apparatus was 2.2 amps, and the spinning yarn had a fineness and uniformity of 1.1%, which showed good spinning workability.

When the temperature of the extender zone A exceeds 240 ° C, the feeding is poor, and the pressure rises in the gear pump, and when the temperature of the extender zone A is less than 240 ° C, the feeding and the radioactivity are poor. Considering the heat transfer temperature of the chip, if the dehumidification hot air generator (3) dehumidifies it to about 80 ~ 120 ℃ and blows the hot air into the extruder inlet, the introduced chip has better radioactivity than normal temperature and the extruder has good Can operate in the feeding state. In particular, it is preferable to control the temperature to 90 ° C, and if the temperature is lower than 80 ° C, the chip is not supplied, and the radioactivity is poor. By using the dehumidifying hot air generator 3, it is possible to prevent the extruder from being overloaded, but there is a problem that the molecular activity between the chips is active and condensation occurs.

In order to solve this problem, the present invention solves the problem that the chip is not supplied by condensation between the chips at the inlet of the extruder by stirring at a speed of about 12 to 15 times per minute by installing an agitator as shown in the drawing. Can be. If less than 12 times per minute, the stirring is not good, the oblique line occurs during the post-processing, if more than 15 times per minute, the chip and the chip is condensed with each other, there is a problem that the supply of chips. In addition, if the temperature of the feeding zone of the extruder is set to a lower temperature than when using an existing chip, improved chip supply can be achieved.

In the following Examples and Comparisons, the present invention will be described in more detail, but the scope of the present invention is not limited.

Example 1

A polyester chip having an intrinsic viscosity of 0.65, containing less than 1 microgram of titanium dioxide, containing 7wt% of the total weight of the polymer, was synthesized and dried for 4 hours at 110 ° C. and 140 ° C. in Ebi-drying, and 285 ° C. and 100 Rad./ Melting viscosity was measured on condition of Sec., And it was 6,900 poise. The speed of the stirrer was stirred at 13 times per minute, the chip was fed into the hopper with the temperature of the dehumidifying hot air conditioner at 90 ° C, and the zone A, B, C, gear pump and spin block of the extruder of the spinning device. The temperature was set to 240,260, 270, 275 and 285 ° C., respectively, and spun at a spinning speed of 1,300 m / min. At this time, the load on the extruder of the spinning device was 2.2 amperes. As a result of checking the uniformity of the spun yarn diameter, the U% was 1.1 and the supply and demand of the resin during spinning was quite good.

Comparative Example 1

The same chip as in Example 1 was used, but the hopper was not used and the temperature of the dehumidifying hot air generator was set at 90 ° C., and the zones A, B, C, gear pump and spin block of the radiator extruder were used. The angles were 240, 260, 270, 275, and 285 ° C. and spun at a spinning speed of 1,300 m / min. At this time, the load on the extruder of the spinning device was 2.5 amperes, which was in good condition for 30 minutes after the start of spinning, but since the spinning was stopped due to the inability to supply resin due to condensation between chips at the extruder inlet. As a result of confirming the uniformity of sclerosis after sacrifice, about U% was 1.2% and was relatively good during the spinning time.

Comparative Example 2

The same chip as in Example 1 was used, and the temperature of the zone A, B, C, gear pump and spin block of the radiator extruder was 240, without using the dehumidifying hot air generator and the stirrer. It was set as 260, 270, 275, and 285 degreeC, and it was spun at a spinning speed of 1,300 m / min. At the beginning of winding, it took more than about 4.1 amps, and during the spinning, the tip pressure of the extruder suddenly increased and decreased, and when the working was poor, it gradually increased and the load on the extruder reached 7.5 amps. Under the overload, the spinning device stops automatically, so no more spinning is possible. As a result of measuring the uniformity of the island diameter after the sacrifice, the measurement was not possible because of the tolerance of the measuring device.

Claims (4)

In the spinning step for the production of polyester yarn, the polyester with the excess inorganic particles is sufficiently stirred in the hopper (1) by the stirrer (2) and dried with a dehumidifying hot air generator (3), and then A method for producing a polyester fiber excellent in color development and drape, characterized in that the spinning is supplied to the zone constantly. The polyester fiber according to claim 1, wherein the rotation speed of the stirrer 2 is set to 10 to 15 times per minute and the temperature of the dehumidifying hot air generator 3 is in the range of 80 to 120 ° C. Manufacturing method. The manufacturing method of the polyester fiber excellent in the color development and drape property of Claim 1 which makes the temperature of the Extruder zone A part 240 degreeC, and the spinning speed 1500m / min-4,500m / min. In a known polyester fiber spinning apparatus, a stirrer (2) rotated by a stirrer blade driving prime mover (4) is connected to a hopper (1) for supplying a polyester chip for spinning, and a raw material sensor (6) And a dehumidifying heat generator (3) for driving the prime mover (4) to detect the presence of the polyester chip to dry the polyester chip.