KR100742414B1 - Process for multi spinning of nylon 6/polytrimethyleneterephthalate filaments - Google Patents

Abstract

A multi-spinning method of nylon 6/polytrimethylene terephthalate filaments is provided to offer a composite yarn for manufacturing the fabric with the excellent melange effect with the high production speed. A nylon 6 polymer and a polytrimethylene terephthalate polymer melted by two extruders are supplied to a spinneret(3) and simultaneously melted and spun through the spinneret at the spinning temperature of 250 to 265 degrees centigrade. Thereafter the melted nylon 6 polymer and polytrimethylene terephthalate polymer is passed through a yarn cooling period(4) and cooled by the cold wind with 12 to 15 degrees centigrade. Thereafter, oil is imparted to the resulting material and then the resulting materials are collected. Thereafter, the collected resulting materials of nylon 6 polymer and polytrimethylene terephthalate polymer is drafted between the first and second godet rollers(6,7) with the draft ratio of 1.7 to 2.3 and then wound.

Description

Process for Multi Spinning of Nylon 6 / Polytrimethyleneterephthalate filaments

1 is a schematic diagram of a composite spinning process of the nylon 6 / polytrimethylene terephthalate filament of the present invention.

2 is a plan view of the spinneret used in the composite spinning method of the nylon 6 / polytrimethylene terephthalate filament of the present invention.

Figure 3 is a bottom view of the spinneret used in the composite spinning method of the nylon 6 / polytrimethylene terephthalate filament of the present invention.

4 is a cross-sectional view of the spinneret used in the composite spinning method of the nylon 6 / polytrimethylene terephthalate filament of the present invention.

5 is a cross-sectional photograph of a composite filament spun by the method of the present invention.

6 is a photograph of the surface of a fabric woven from a composite filament spun by the method of the present invention.

※ Explanation of code for main part of drawing

1: Extruder for nylon 6

2: Extruder for polytrimethylene terephthalate

3: spinneret 4: thread cooling section

5: filament 6: first high roller

7: 2nd gourd roller 8: Winding part

9,10: spinning liquid inlet 11, 12: spinning hole

13: nylon 6 filament

14: polytrimethylene terephthalate filament

The present invention relates to a composite spinning method of spinning and winding two kinds of synthetic fibers of nylon 6 and polytrimethylene terephthalate through the same spinneret at the same time. In particular, the elasticity and the recovery rate are excellent and the melange effect after dyeing is excellent. Excellent fabric filaments can be produced with high productivity.

Currently, the synthetic fiber is manufactured by melt spinning method, nylon and polyester fiber. The fibers can be obtained into the fiber bundle by extruding the fluidized polymer through the spinneret and then passing it through the cooling air to solidify. In general, since the synthetic fibers have different melting points and intrinsic viscosities, and their spinning conditions are different, the synthetic fibers are spun separately for each type of synthetic fiber, except for the spinning of the sheath type filaments for some special purposes.

On the other hand, in order to realize high added value by expressing differentiated sensitivity and tactile characteristics using the synthetic fibers, many companies are using heterogeneous synthetic fibers as intermixed or interwoven materials. However, in order to manufacture such interlaced or interwoven blended filaments, it is necessary to interlace or traverse separately spun filaments, resulting in a complicated process and low productivity. Difficult to achieve the distribution had a problem of poor weaving.

Therefore, in the present invention to overcome the problems of the prior art of mixing the different kinds of synthetic fibers in the four-step processing step to provide a mixed fiber with high productivity to achieve a homogeneous distribution of different types of filaments.

In order to solve the above technical problem, the present inventors have learned the spinning condition and cooling condition for simultaneously spinning nylon 6 and polytrimethylene terephthalate, and are capable of simultaneously spinning and winding the two kinds of synthetic fibers to condense and wind them. To provide a way.

Therefore, according to the present invention, the nylon 6 polymer and the polytrimethylene terephthalate polymer, respectively, melted by two extruders are supplied to one spinneret, and then simultaneously melted at a spinning temperature of 250 to 265 ° C through the spinneret. The spun nylon 6 thread and polytrimethylene terephthalate thread are cooled with 12 ~ 15 ℃ cooling wind while passing through the thread cooling section under detention, and then oiling and concentrating are carried out, and the first roller and the second roller are Provided is a composite spinning method of nylon 6 / polytrimethylene terephthalate filament, which is wound up after stretching at a draw ratio of 1.7 to 2.3.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a composite spinning method of simultaneously spinning and winding two kinds of synthetic fibers through the same spinneret, and more particularly to a composite spinning method of nylon 6 filament and polytrimethylene terephthalate filament.

The composite spinning method of the present invention comprises a melting step, spinning step, cooling step, stretching step and winding step as shown in FIG. In the melting step, nylon 6 chips and polytrimethylene terephthalate chips are melted by an extruder for nylon 6 and an extruder for polytrimethylene terephthalate, respectively, and then transferred to a separate polymer supply conduit. It is supplied to the spinning stage. The extruder may use an extruder used for ordinary synthetic fiber spinning, and may melt the two chips by adjusting appropriate melting conditions according to the type of chips to be injected.

The nylon 6 polymer is nylon 6 having a relative viscosity of 2.4 to 2.7, a water content of 100 to 500 ppm, a melting temperature of 210 to 225 ° C, and a glass transition temperature of 35 to 45 ° C, and the polytrimethylene terephthalate polymer has an intrinsic viscosity of 0.79 to 0.82, The use of polytrimethylene terephthalate having a water content of 10 to 35 ppm, a melting temperature of 210 to 230 ° C. and a glass transition temperature of 45 to 50 ° C. can stabilize the spinning.

 In particular, the weight ratio of the nylon 6 polymer and the polytrimethylene terephthalate polymer is preferably adjusted to be 30: 70 to 70: 30, if the content of polytrimethylene terephthalate is less than 30% by weight of nylon 6 component is excessive The elasticity and elastic recovery rate of the final product is lowered and the melange effect cannot be improved after dyeing, and when it exceeds 70% by weight, the melange effect is not expressed.

The molten nylon 6 polymer and the polytrimethylene terephthalate polymer are respectively supplied to the same spinneret 3 and spun at the same time. The spinneret is a spinning solution using one designed such that the two polymers to be injected are not mixed with each other. In each spinneret discharged, only one type of spinner should be discharged. Using the spinneret designed as shown in Figures 2 to 4, two types of spinning liquid may be introduced into the spinning liquid inlet (9, 10) to be discharged through each of the spinning holes (11, 12). .

The spinning temperature in the spinneret is controlled to be 250 ~ 265 ℃ suitable for spinning the nylon 6 and polytrimethylene terephthalate at the same time.

The nylon 6 yarn and polytrimethylene terephthalate yarn simultaneously melt-spun through the spinneret are cooled and solidified while passing through the thread cooling section 4 under the confinement as in a conventional method. In the present invention, 12 to 15 ° C Cooling is carried out by cooling wind of nylon 6 yarn and polytrimethylene terephthalate yarn.

The filaments 5 solidified while passing through the thread cooling section are focused while giving oil to mix nylon 6 filaments and polytrimethylene terephthalate filaments.

Subsequently, the filaments are stretched at a draw ratio of 1.7 to 2.3 to ensure process passability while passing through the first gourd roller 6 and the second gourd roller 7 and then wound up in the winding unit 8.

The composite filament prepared by the composite spinning method of the present invention is a composite filament in which nylon 6 filament and polytrimethylene terephthalate filament are mixed, and has an excellent elastic force, crimp recovery rate, and melange effect after dyeing.

The following examples are given as non-limiting examples of the composite spinning method of the nylon 6 / polytrimethylene terephthalate filament of the present invention.

Example 1

Nylon 6 chips having a relative viscosity of 2.47, a water content of 200 ppm, a melting temperature of 220 ° C. and a glass transition temperature of 40 ° C. were melted in an extruder (JSW) at 275 ° C. and a pressure of 100 kg / cm 2, having an intrinsic viscosity of 0.807 and a water content of 30 ppm. After melting the polytrimethylene terephthalate chip having a melting temperature of 225.8 ° C and a glass transition temperature of 46.9 ° C in an extruder (JSW) at 265 ° C and a pressure of 100 kg / cm 2, nylon 6 polymer and polytrimethylene terephthalate polymer were melted. Simultaneously supply the spinneret with a separate feed conduit at a weight ratio of 40:60, and melt spun at a spinning temperature of 256 ° C simultaneously to pass the nylon 6 thread and the polytrimethylene terephthalate thread through the thread cooling section under detention. After cooling with a cooling air at 占 폚, oiling and condensing were carried out, stretched at an elongation ratio of 1.73 between the first roller and the second roller, and wound up to obtain nylon 6 / polytrimethylenete. Phthalates composite filaments were prepared to 3,600m / min.

Comparative Example 1

A filament of nylon 6 40d / 12fila and a filament of PET 50d / 24fila were interlaced to prepare a composite yarn at a speed of 400 m / min.

The cross-sectional photograph of the composite filament prepared in Example 1 is shown in Figure 5, nylon 6 (13) and polytrimethylene terephthalate filament (14) together with the cotton fibers focused around the composite filament to facilitate taking a cross section ) Is found to be mixed.

The composite filament 66d / 36fila obtained in Example 1 was prepared by weaving plain weave to 74 g / yd as a warp and weft yarn, the composite yarn of Comparative Example 1 was supplied in a slope and nylon 140 denier / polyurethane 40 denier composite yarn The fabric was prepared in the same manner as above by feeding the weft.

The stretch recovery rate of the fabrics was measured by KES FB1 method, and the shrinkage rate was measured by boiling water immersion method (KSK K ISO 5077). The results are shown in Table 1 below.

 division Shrinkage (%) Expansion recovery rate (%) slope Weft slope Weft Example 1 1.2 1.2 72.22 70.56 Comparative Example 1 0.3 0.3 65.98 42.96

According to the present invention, it is possible to achieve a uniform distribution of the dissimilar polymer filament, so that the composite yarn which can manufacture the fabric having excellent elasticity and elastic recovery rate and excellent melange effect after dyeing is about 8 ~ 10 times higher than the composite yarn by the conventional interlace. It could be produced at high production speed.

Claims (3)

Nylon 6 polymer and polytrimethylene terephthalate polymer, each melted by two extruders, were supplied to one spinneret, and the nylon6 thread was simultaneously melt-spun at a spinning temperature of 250 to 265 ° C through the spinneret; Cool the polytrimethylene terephthalate thread with a cooling wind of 12 ~ 15 ℃ while passing through the thread cooling section under detention, add oil and focus, and draw ratio between the first and second rollers 1.7 ~ 2.3 A composite spinning method of nylon 6 / polytrimethylene terephthalate filament characterized in that the film is wound up after stretching. According to claim 1, wherein the nylon 6 polymer is nylon 6 having a relative viscosity of 2.4 to 2.7, water content of 100 to 500ppm, the polytrimethylene terephthalate polymer is polytrimethylene having an intrinsic viscosity of 0.79 to 0.82, water content of 10 to 35ppm A composite spinning method of nylon 6 / polytrimethylene terephthalate filament, characterized in that it is terephthalate. The method of claim 1 wherein the weight ratio of the nylon 6 polymer and polytrimethylene terephthalate polymer is 30:70 ~ 70:30 composite spinning method of nylon 6 / polytrimethylene terephthalate filament.

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