KR100356674B1 - Method for producing two-color polyester conjugated filament - Google Patents

Abstract

PURPOSE: A method for producing two-color polyester conjugated filament is provided, thereby preventing the loop formation of polyethylene terephthalate, and dyeing the filament efficiently with a basic dye. CONSTITUTION: A method for producing two-color polyester conjugated filament comprises compositely spinning copolymer polyester containing 0.8 mole% of metal sulfonate and polyethylene terephthalate, wherein the first godet roller speed(V1) is 1000 to 2500 meter/min, the second godet roller speed(V2) is 3500 to 5500 meter/min, the first godet roller temperature(T) is 75 to 95 deg. C, wire drawing ratio(D) is 2.2 to 3.5 and the birefringence rate of copolymer polyester containing 0.8 mole% of metal sulfonate is 0.80 to 0.90.

Description

Manufacturing method of dichroic polyester composite yarn

The present invention relates to a method for producing a dichroic polyester composite yarn having a dichroic effect having a different dyeability to basic dyes, and an improved manufacturing process and post-processing properties.

Dichroic polyester filaments are produced by a combination of two types of chips or filaments (basic dye chlorinated polyester and basic dye fluorinated polyester) by methods such as complex spinning, chip blending, and tetrasynthetic yarn.

Among the above methods, the dichroic polyester by the compound spinning method is subdivided into the inter-filament mixing method and the inter-filament mixing method, and the dichroic polyester filament by the inter-filament mixing method between the filaments is, for example, Japanese special application 58-43485, 57 As suggested in -8886, 53-8823 and in one particular 52-74053, the use of basic dye fluorinated polyester (polyethylene terephthalate) and basic dye chlorinated polyester is performed by mixing through a distribution plate and nozzle As a method of dichroic effect, this method is produced by low-speed spinning (1500m / min), and the basic dye fluorinated polyester is expressed as a loop after stretching by a large elastic recovery rate difference between the two components due to the high draw ratio. This causes a decrease in elongation and workability of the post-process. In addition, as described in Japanese Patent Application No. 58-38524 and Japanese Patent Application No. 61-296121, 61-89326, 62-184185, the above looping problem is solved when the dichroic polyester filament is manufactured from a deep sheath composite fiber. The basic dye chlorinated polyester is the core component in the filament cross-section of the basic component, and the basic dye fluorinated polyester (polyethylene terephthalate) is disposed as the super constituent to reduce the dichroic effect.

Secondly, when dichroic polyester filament is produced by the method of chip blending introduced in Japanese Patent Application No. 55-158328, 55-158329, 55-40810, there is a uniform dichroic effect by blending and no loop occurs. Dichroic effect is too weak.

Finally, the jointing method of basic dye salted polyester and basic dye fluorinated polyester introduced in Japanese Patent Application Laid-Open No. Hei 4-185735 has the disadvantage that severe loops occur as in the mixed spinning by complex spinning, and the yarn is spun after spinning each component. As a result, there is a problem that the productivity is lowered and the manufacturing cost is increased.

Accordingly, the present invention has been made to solve various problems of the prior art in producing a dichroic polyester.

That is, the present invention is a condition that satisfies the following formula in producing a dichroic polyester composite yarn by a composite spinning of basic dye chlorinated polyester and basic dye fluorinated polyester using the polyester composite filament manufacturing apparatus shown in FIG. It is to provide a method for producing a dichroic polyester composite yarn characterized in that the direct spin-drawing.

In the above formula,

V1: 1st high-detro controller speed (meters / minute)

V2: 2nd coder controller speed (meters / minute)

T: 1st Godetrol Silver Degree (℃)

D: draw ratio

X: It is the birefringence of basic dye salt polyester.

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

In the present invention, as the basic dye fluorinated polyester (b), linear polyethylene terephthalate is used, and as the basic dye chlorinated polyester (a), a copolyester containing 0.5 to 1.5 mole% of the metal sulfonate relative to terephthalic acid is used.

1 is a process schematic diagram for the present invention, in which the basic dye salted polyester and the basic dye fluorinated polyester are melt extruded in the extruder 1 and 2, respectively, and extruded through the spin beam 3 and the spin pack 4. At this time, the extruded thread 5 is cooled by the cooling device 6, and then imparts an oil through the roller oiling device 7, and then between the first and the second gode controller (8) and the second gode roller (10) It is wound up by the winder 12 after being stretched by the speed difference. At this time, the l-th Godetrol speed should be 1000 m / min or more and 2500 m / min or less, and the second Godetrol speed should be 3500 m / min or more and 5500 m / min or less, and the draw ratio should be 2.2 or more and 3.5 or less. The speed of the controller should be 1500 m / min or more and 2300 m / min or less, the second goth controller speed should be 4650 m / min or more and 5200 m / min or less, and the draw ratio should be 2.3 or more and 3.1 or less. When the first high-detro controller speed is less than 1000 m / min, the basic dye salt polyester at high draw ratio is highly oriented so that the metal sulfonates ionically bonded to each other in the basic dye salt polyester are subjected to a lot of stretching stress and are relaxed at the time of winding up after stretching. The elastic recovery phenomenon occurs, and the basic dye fluorinated polyester forms a loop due to a large elastic recovery difference between the two polyesters, which causes a decrease in stretchability and workability. In addition, when the speed of the first high detolerator is more than 2500 meters / minute, the yarn processability is poor due to the trimming bundle due to the lowering of the stretchability of the basic dye salt-dye polyester having low molecular weight by high-speed winding.

The first gode controller temperature is preferably 75 ° C. or more and 95 ° C. or less, and more preferably 80 ° C. or more and 90 ° C. or less. If the first high-detro controller temperature is less than 75 ° C, the trimming in the first high-detro controller due to non-uniform stretching occurs, and if it exceeds 95 ° C, the trimming occurs due to unstable running of the yarn in the first high-detro controller. The birefringence of the basic dye valent polyester is preferably 0.8 or more and 0.9 or less, and more preferably 0.82 or more and 0.88 or less.

In the present invention, the mixed form of the basic dye chlorinated polyester and the basic dye fluorinated polyester can be varied. Examples are shown in FIGS. 2A to 2D. Wherein (a) is a basic dye divalent polyester and (b) is a basic dye fluorinated polyester (b).

The present invention prevents the occurrence of loops of basic dye fluorinated polyester after stretching by producing a dichroic polyester blended yarn made by mixing in basic spinning step from basic dye vulcanized polyester and basic dye fluorinated polyester by spinning direct drawing method. It is possible to provide a method for producing a polyester composite filament having excellent productivity and processability and excellent dyeing effect when dyeing with a basic dye in a later process.

Example

The intrinsic viscosity measured by phenol / tetrachloroethane was 0.55, and the co-polyester containing 0.8 mole% of metal sulfonate relative to terephthalic acid was used as the basic dye salt polyester, and the intrinsic viscosity measured by phenol / tetrachloroethane was 0.63. The dichroic polyester composite filament of the hybrid form as shown in Fig. 2 was discharged at a spinning temperature of 299 ° C through a circular spinneret of 18 holes using phosphorus polyethylene terephthalate as the basic dye fluorinated polyester. 2,500 m / min, second high-detroller speed 4500 m / min-5500 m / min, 1st high detroller temperature 75 ° C-95 ° C, 2nd high detroller temperature 135 ° C, spinning and stretching 100d / 48f Got.

The combined ratio is 45% by weight of basic dye chlorinated polyester and 55% by weight of basic dye fluorinated polyester.

The results are shown in Table 1.

1 is a process schematic diagram showing an apparatus for producing a dichroic polyester composite filament of the present invention,

2 (A) to (D) are schematic diagrams showing examples of various intermixing states on the nozzle of the dichroic polyester composite filament of the present invention.

Explanation of symbols on the main parts of the drawings

1,2 Extruder 3: Spin Beam

4: spin pack 5: movement

6: cooling device 7: roller oiling device

8: 1st high-speed controller 9: 1st separate roller

10: second gode controller 11: the second separate roller

12: winder

a: basic dye salt polyester

b: basic dye fluorinated polyester

Claims (1)

In producing a dichroic polyester composite yarn by complex spinning two components of copolyester polyester and polyethylene terephthalate containing 0.8 mole% of metal sulfonate, the first Godet roller speed V1 (meter / minute) and the second goth The birefringence X of the co-polyester containing the controller speed V2 (meter / min), the first goth roller temperature T (° C), the draw ratio D, and the metal sulfonate 0.8 mole% is satisfied. Method for producing a dichroic polyester composite yarn.