KR19980013899A - Production method of shrink-fused polyester yarn for knitted polyester - Google Patents

Abstract

In producing the polyester double-stranded yarn for knitting according to the present invention, two filament groups are simultaneously radiated through a spinneret symmetrically perforated on the center line of the spinneret, and the high- Characterized in that the first filament group and the second filament group, which are unstirred yarns, are simultaneously passed through a fluid entanglement apparatus, and then wound up through a hot plate subjected to entanglement and fusing, thereby winding the polyester yarn.

Description

Production method of shrink-fused polyester yarn for knitted polyester

FIG. 1 is a manufacturing process diagram of the present invention. FIG.

FIG. 2 is a schematic view showing a first winding roller according to the present invention; FIG.

FIG. 3 is a schematic view showing the second winding roller of the present invention. FIG.

Description of the Related Art [0002]

1: spinneret 2: first filament group

3: second filament group 4: first winding roller

5: Second winding roller 5a:

5b: the other end 6: fluid interlocking device

7: soleplate

The present invention relates to a polyester double-stranded filament yarn which shrinks on a woven or knitted fabric, and a method for producing the same. More particularly, the present invention relates to a double-stranded filament yarn exhibiting excellent shrinking effect and a method for producing the same.

Conventionally, there is a method of manufacturing a double-edged cone-shaped filament yarn by a spinning process and a fluid mixing process through a spinning device. However, in this shrinking effect, , The shrinkage rate is reduced and the shrinkage is constantly maintained in a low-temperature storage or post-processing process which is more thermally stable than the high-temperature storage, so that the shrinkage difference is reduced, In order to increase the shrinkage difference between the high shrubs and the low shrinking yarns, the sizing must be progressed to a low temperature and low speed in order to prevent the reduction of the shrinkage rate of the high shrubs in the sizing process. Poor results in poorly formed nonwovens The. In addition, when a high orientation non-drawn yarn having a boiling shrinkage of 60 to 80% and a yarn spinning speed of 2,800 to 3,500 m / min is used as a high shrubbery yarn, it has a high boiling water shrinkage ratio but has no thermal stability, So that the desired shrinkage effect can not be obtained on the fabric.

There is also known a method of fusing a highly oriented non-drawn filament yarn which is spontaneously elongated in accordance with the conditions of the co-extruded filaments having thermal stability and the heat treatment conditions by changing the structure of the polymer.

However, this method also has to be subjected to various processes such as the production of coagulated cornstalks, the production of highly oriented undrawn yarn, and the fusing of two yarns, resulting in deterioration of quality and productivity. It is possible to apply to the fabrication of the fabric with the heat fixation process. However, when the non-oriented unoriented yarn is subjected to the refining and dyeing process without heat treatment, it shrinks more than the high- It is not suitable for knitted fabrics which do not have a heat treatment process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to improve the manufacturing process so as to produce a twin-threaded bead with excellent shrinkage effect and easy control of shrinkage rate.

The present invention for this purpose is produced by simultaneously spinning an effect yarn having heat shrink characteristics and self-stretchability and a core yarn having a relatively large shrinkage of a known polyester highly oriented unoriented yarn at the same time, The shrinkable filament yarn exhibiting an excellent shrinking effect on the knitted fabric by continuously performing the heat treatment having the same effect as that of the shirred filament yarn.

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

FIG. 1 is an example of a manufacturing process for explaining features of the present invention.

The two filament groups 2 and 3 are simultaneously emitted through the spinneret symmetrically perforated in the center line of the spinneret 1 and the two filament groups 2 and 3 are wound around the first winding roller 4 and the second winding roller 3, And is entangled and mixed with the fluid entraining device 6 through the winding roller 5 at the same time, and is heat-fixed in the heat plate 7 to manufacture a double-headed annulus.

FIG. 2 shows a first winding roller. One end A is a portion through which the first filament group passes, and the other end B is a portion through which the second filament group passes. And the winding speed is 2,800 ~ 3,500m / min.

The second winding roller is a stepped roller having one end portion 5a and the other end portion 5b having different diameters. The winding speed of the one end portion 5a is the same as that of the first winding roller and the first filament group 2 is passed And the other end 5b through which the second filament group 3 passes has a winding speed of 1.4 to 1.8 times of one end 5a and is thermally fixed at a temperature of 100 to 140 DEG C, And the diameter D2 of the other end should satisfy 1.4 x D1 D2 1.8 x D1.

The two filament groups passed through the second winding roller are simultaneously entangled while passing through the fluid entrainment device and then passed through a hot plate at 140-180 ° C. and then wound to produce the contraction filament yarn.

In order to produce a fiber product having excellent shrinking effect, the present invention is characterized in that a highly oriented nonwoven fabric (first filament group) having softness and excellent luster and a long fiber bundle (second filament group) The first filament group is passed through one end A of the first winding roller and one end 5a of the second winding roller to be a high-ratio undrawn yarn, and the second filament group is wound around the first winding roller Between the other end (B) and the other end (5b) of the second winding roller is 1.4 to 1.8 times longer than the first filament group.

When the winding speed of the first winding roller is less than 2,800 m / min, it is difficult to obtain undrawn yarn with high orientation. When the winding speed of the first winding roller is more than 3,500 m / min, the yarn exhibits physical properties close to that of the drawn yarn, It is not suitable for obtaining. If the temperature of the other end portion (B) is not higher than the glass transition temperature by 5 ° C or more, the unevenness of the stretching causes unevenness of physical properties, resulting in generation of a dyed yarn or the like.

The second winding roller is a stepped roller having different diameters, and the diameter D2 of the other end is 1.4 to 1.8 times the diameter D1 of the one end. When the roller is rotated by the same driving motor, the other end is relatively 1.4 to 1.8 times A substantial running speed is generated. When the temperature of the other end portion is less than 100 ° C, incomplete heat setting is performed, and there is a high possibility that shrinkage unevenness is generated in the length direction of the yarn. When the temperature exceeds 140 ° C, the shrinkage ratio is lowered due to excessive heat treatment, .

The first filament group passed through the second winding roller becomes a highly oriented unstretched yarn and the second filament group has the same physical properties as a normal drawn yarn.

Such a highly oriented non-drawn filament yarn and a drawn filament yarn are folded through a fluid entangling device so as to have an interwoven point of 30 / m or more, passed through a hot plate, and wound up to produce a double filament yarn.

If the temperature of the hot plate is less than 140 ° C, the heat resistance of the first filament group is insufficient, and it is difficult to impart the heat resistance. However, if the temperature is higher than 180 ° C, The effect of this contraction is reduced because the outgoing wall is reduced.

The knitted product using the shrinkable filament yarn manufactured in this manner can exhibit shrinkage in stages in the refining-preliminary set-dyeing-final set process, and is excellent in knitting, excellent in bulimia, Can be obtained.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.

Examples 1-5 and Comparative Examples 1-3

The first filament group consisted of 50D / 36F and the second filament group consisted of 30D / 24F using a cantilever, in which 36 yarn loops and 24 yarn loops with a circular cross section were perforated symmetrically with respect to the detention center line. In the final production of 80D / 60F ready-mixed filament yarn by simultaneous spinning and direct stretching method, melt-spinning was carried out at 286 ° C using polyethylene terephthalate polymer having an intrinsic viscosity of 0.658, The filament group is cooled and solidified, and the first filament group passes through one end of the first take-up roller and one end of the second take-up roller, and the second filament group passes through the other end of the first take- The first filament group is a highly oriented unstretched filament and the second filament group has a temperature at the other end of the first winding roller that is higher than the glass transition temperature by at least 5 DEG C and a drawing temperature of 1.4 To 1.75 and the other end of the second take-up roller was thermally fixed at 100 to 140 ° C to obtain a stretched yarn.

Then, the first filament group and the second filament group were fed through a fluid entanglement apparatus at the same time as twisting at 20 / m of inter-woven points, passed through a hot plate at 140-180 ° C.,

Using 80 denier 60 filaments manufactured in this manner, the tissue of a 24-gauge bristle paper was used as a table tissue, and a dough of 100 denier 48 filaments, , Pre-set at 170 ° C for 30 seconds, stained with a conventional staining method (liquor-type dyeing machine), and finished through a final set at a temperature of 170 ° C for 30 seconds.

The results for manufacturing conditions, workability and product quality are shown in Tables 1 and 2.

Table 1

However, the glass transition temperature was 78 占 폚

The winding speed of the first winding roller: 3,030 m / min

Table 2

Dyeing stains ●: Natural dyed stains

: It is not natural, but the gloss is slightly improved

X: Coarse dyeing stains such as long dyed yarn

Total Tactile Coefficient: TOTAL tactile coefficient (1 - poor to 5-excellent) measured by KS SYSTEM

As can be seen from the above table, when the requirements of the present invention are satisfied, not only the working efficiency is good but also the fineness of the knitted fabric on the final processed paper is excellent.

Claims (4)

In the production of a double-stranded filament yarn composed of a non-drawn filament yarn and a high-frequency filament yarn using a heat-transferable polyester resin, the yarn is simultaneously radiated through two groups of filaments symmetrically perforated with respect to the filament center line Each filament group is passed through a first winding roller composed of A and B having different temperatures and a second winding roller having a diameter of D1 and D2, and then passed through the fluid mixing apparatus at the same time, Wherein the polyester yarn is a polyester yarn. The method according to claim 1, Wherein the winding speed of the first winding roller is 2,800 to 3,500 m / min. The method according to claim 1, Wherein the temperatures of A and B of the first winding roller and the diameters D1 and D2 of the first winding roller satisfy the following conditions. - next - A = room temperature B Glass transition temperature + 5 ° C 1.4 占 D1? D2? 1.8 占 D1 A: Passing part of the first filament group of the first winding roller. B: passing portion of the second filament group of the first winding roller. D1: Diameter of one end of the second winding roller D2: diameter of the other end of the second winding roller The method according to claim 1, Wherein the temperature of the hot plate is in the range of 140 to 180 占 폚.