KR950006915B1 - Manufacture method of polyester fiber be large-small effect - Google Patents

Abstract

An undrawn yarn of a different finess having a birefringence of 20×10-3 was spun using spinnerets with a nozzle hole of a different diameter. The undrawn yarn was incompletly drawn at 60-85 degree C in the drawing ratio of 1.2-2.4, tension of 2-10 g to give a polyester fiber having an excellent thick and thin effect. The polyester fiber has undrawn part and a birefringence of 60×10-3-130×10-3.

Description

Manufacturing method of polyester fiber with excellent posture effect

1 is a diagram schematically showing an embodiment of a spinneret that may be employed in the present invention.

2 is a schematic view of the stretching apparatus used in the present invention.

3 is a diagram schematically showing a yarn produced by the present invention.

* Explanation of symbols for main parts of the drawings

2: nozzle hole 4: undrawn gentleman cake

6: tension guide 8: eyelet guide

10: traverse guide 12: pressurized roller

14: supply roller 16,22: separator roller

18: hot roller 29: plate heater

24: drawing roller 26: the rapid guide

28: Traveler 30: Ring Holder

32: interlaced nozzle 34: waste spool

The present invention relates to a method for producing a polyester filament yarn, and more particularly, to a method for producing a polyester fiber that gives a posture effect by varying the fineness in the spinning process and achieving partial unstretching in the stretching process.

The technology for imparting a poise effect on synthetic long fibers is a technique that has been tried in the synthetic industry as it is being developed to express a dyeing effect and a special touch resembling a natural fiber fabric after the final dyeing.

As a conventional method, a method using a fine island spinneret having different nozzle hole sizes of a spinneret, a method of achieving uneven stretching by uneven heat treatment by giving unevenness to a plate heater and a roller of a stretching machine during stretching, or As disclosed in JP-A-63-35838 and JP-A-63-50520, there has been a method of performing heat treatment flammable processing by intermittently adding water or an aqueous liquid to the surface of the yarn.

However, in the conventional method, in the first method, it is difficult to set the boiling boiling and stretching conditions in the first method, and the posture effect occurs between the two fibers in the final product, but the posture effect is expressed in the length direction of each fiber. There was a drawback that the dyeing effect or touch is not expressed like a natural fiber fabric, and in the second case, there is a disadvantage in that the appearance of the product is poor due to insufficient cost as well as the posture effect of modifying the existing equipment.

In addition, in the third method, the posture is not imparted to the yarn itself, but by attaching foreign substances to the surface, the final product has a disadvantage in that the touch is poor and the dyeing state is poor.

The present invention attempts to overcome the disadvantages of the prior art as described above.

An object of the present invention is to solve the problems of the prior art as described above and to provide a polyester fiber yarn excellent in the posture effect.

It is another object of the present invention to provide a polyester filament yarn for producing a synthetic fiber fabric closer to the appearance and feel of a natural fiber fabric.

The method for producing a polyester fiber having a posture effect according to the present invention is a fine birefringence having a birefringence of 20 × 10 ^-3 to 50 × 10 ^-3 by spinning using spinnerets having different nozzle hole diameters. The process of manufacturing a gentleman and the above-mentioned fine island twisted yarn are maintained at a temperature of 60 to 85 ° C. and a plate heater at 10 to 80 ° C. while maintaining the tension of the feeder in 2 to 10 kg by the tensioner of the drawing machine. The process is performed to maintain incomplete stretching with partial unstretched portions at a draw ratio of 1.2 to 2.4.

It is preferable to interlace air before oiling in order to facilitate the connection of fibers in the spinning process.

The above features of the present invention will become more apparent from the following detailed description and drawings.

1 is a diagram schematically showing one embodiment of a spinneret that may be employed in the present invention. As shown in FIG. 1, in the spinneret employed in the present invention, the sizes (diameters) of the nozzle holes 2 are not all the same. In this way, by varying the size of the nozzle hole, isotsa yarn is produced in the spinning step. In the spinning of such fine fibers, the spinning conditions must be appropriately and accurately adjusted to prevent cutting and to achieve uniform winding.

It is desirable to provide an air interlacing nozzle at the time of spinning so as to slightly entangle the spun yarn by providing an air interlace nozzle to impart focusing properties and to improve post-processability.

It is preferable that the birefringence of the yarn in the spinning step is 20 × 10 ⁻³ to 50 × 10 ⁻³ .

The undrawn yarn cake thus prepared is fed to the stretching machine as in FIG. 2 for stretching. The stretching machine used in the present invention should maintain the long-range in the process of the company by 2 to 10g by adjusting each guide including the tension guide 6 in a conventional stretching machine or stretching process.

When the tension of the yarn is out of the above range, the drawing workability is remarkably inferior.

It is preferable to keep the temperature of the heating roller 18 at 60-85 degreeC, and when it out of this range, cutting | disconnection, a lot, etc. will increase. It is preferable that the temperature of the plate heater 20 shall be 10-80 degreeC. It is preferable to set the draw ratio to 1.2 to 2.4. When the draw ratio is less than 1.2, weaving is impossible due to unstretching, and when the draw ratio is larger than 2.4, the incidence of cutting is increased due to the excessive drawing.

After the stretching process, the polyester fiber having the posture effect of the present invention is completed. The final incompletely stretched yarn has a partial unstretched portion in the length direction of the fiber, and the final birefringence is from 60 × 10 ^-3 to 130 × 10 ^-3 . do.

Example 1

As shown in FIG. 1, a polyester 115d / 36f unstretched yarn having a birefringence of 25 × 10 ⁻³ , prepared using spinnerets, was introduced into a drawing machine, and the heating roller temperature was 75 ° C. Stretching was performed under the conditions of a plate heater temperature of 15 ° C., a firing speed of 650 m / min, an elongation ratio of 1.414, and an emulsion treatment pressure of 1.5 kg / cm ³ to obtain an incompletely drawn yarn having a pore effect of 80d / 36f having a birefringence of 100 × 10 ⁻³ . .

Comparative Example 1

The test was performed under the same conditions as in Example 1 except that only the temperature of the heating roller was changed to 95 ° C.

[Comparative Examples 2-4]

In the unstretched state, the general unstretched yarn (UDY), direct spinning yarn (POY) having the same degree of fineness, and the fineness of the two fine islands of Example 1 were tested under the same conditions as in Table 1.

Main process conditions and final physical properties for the above Examples and Comparative Examples are shown in Table 1 below.

TABLE 1

Evaluation Table of Properties of Examples and Comparative Examples

As described above, according to the present invention, polyester fibers having excellent post dyeing effect and natural textile fabric feel and excellent post-processing posture effect are produced in the final product.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the present invention and that such modifications and modifications belong to the appended claims.

Claims (2)

A spinning process for producing a fine island undrawn yarn having a birefringence of 20 × 10 ⁻³ using spinnerets having different nozzle hole diameters; And using a conventional drawing machine of the above-mentioned fine island yarn, having a partial unstretched portion with a heating roller temperature of 60 to 85 ° C. and a draw ratio of 1.2 to 2.4, using a conventional drawing machine and having a birefringence of 60 × 10. ^A method for producing a polyester fiber having an excellent posture effect, which comprises a step of incompletely stretching to ^-3 to 130 × 10 ^-3 . The method according to claim 1, wherein the interlacing is performed before oiling in order to focus the fibers in the spinning process and improve post-processability.