KR100430631B1 - Polyester yarn having different dyeing properties and excellent drapeability, and manufacturing method thereof - Google Patents

Abstract

PURPOSE: Polyester yarn is characterized by having different dyeing properties, showing multi color tone and having excellent drapeability. The polyester yarn is useful for clothes. A manufacturing method thereof is characterized by reducing a production cost, omitting a confounding step and setting copolymerized polyester polymer partly on circumference of grey yarn. CONSTITUTION: Polyester yarn having different dyeing properties is obtained by the steps of: preparing copolymerized polyester polymer(2) which is extended from circumference of grey yarn to inside and is capable of being dyed with a cation dyes; composite-spinning the copolymerized polyester polymer(2) and common polyester polymer(1) to range the polymers(2) of over two dispersively on a cross-section of the grey yarn; and then weight-reducing the copolymerized polyester polymer(2) partly. Weight ratio of the polyester polymer(1) and the copolymerized polyester polymer(2) is 60-80 : 20-40.

Description

Di-dyed polyester yarn and its manufacturing method.

The present invention relates to a dichroic polyester yarn in which various color tones (multi-tones) are expressed upon dyeing and a method for producing the same.

Dichroic polyester yarns, in which various shades appear during dyeing, are mainly used as yarn for clothes.

As a conventional technique for imparting a multi-tone effect to a polyester yarn, a method of combining or complex spinning two kinds of polymers having different dyeability is used.

First of all, the method of poly-stretching specifically describes spinning two kinds of polymers having different dyeing properties to prepare separate polyester non-stretched yarns, and then weaving, stretching and air interlocking the polyester non-stretched yarns to form a dichroic polyester yarn. To prepare.

In this method, the yarn manufacturing process is complicated because the spinning process is performed separately to prepare two kinds of polyester unstretched yarns, and the spinning process, the stretching process, and the entanglement process are performed in two stages. In addition, the air consumption in the air entanglement process is high. For these reasons, there is a problem in that the production cost of the yarn rises while sufficient dichroic effect cannot be obtained.

On the other hand, when the composite spinning method is described in detail, two kinds of polymers having different dyeing properties are spun in the form as shown in FIG. 1 or 2 to prepare a polyester non-stretched yarn, which is stretched and entangled to produce a dichroic polyester yarn. Manufacture. This method is advantageous in that the spinning process is simplified in comparison with the above-described stretching method, but the manufacturing cost of the yarn is still increased because it must go through an air entanglement process.

In addition, in the cross section of the composite yarn, in Fig. 1, two polymers (1 and 2) having different dyeing properties are adjacent to each other by side by side type, and in Fig. 2, a catch-on dye salt type copolymer poly It is an island-in-the-sea state in which the ester polymer 2 is buried in the general polyester polymer 1. In all of them, the copolyester polymer 2 is concentrated in only one part of the yarn cross section. As a result, an effective multi-tone effect at the time of dyeing cannot be expected.

In particular, in the island-in-the-sea state as in FIG.

In the present invention, in order to solve the above-described problems, various color tones are expressed during dyeing, and to provide a method for producing a dichroic polyester yarn having excellent draft properties at a low manufacturing cost without entanglement process.

1 and 2 are cross-sectional views of polyester yarns that are composite spun by conventional methods.

3 is a cross-sectional view of the polyester yarn of the present invention before alkali weight loss processing.

4 is a cross-sectional view of the polyester yarn of the present invention after alkali weight loss processing.

5 is an enlarged view of the surface of the polyester yarn of the present invention after alkali weight loss processing.

1 to 5, 1 is a general polyester polymer, and 2 is a cation dye saltable copolyester polymer.

The present invention relates to a dichroic polyester yarn in which various color tones are expressed and a method for producing the same.

The present invention is characterized in that two or more portions of the cationic dye-flammable co-polyester polymer (2) extending from the outer periphery of the yarn are arranged on the yarn cross-section, and the copolyester polyester (2) in the general polyester polymer (1) The weight ratio of the present invention is 60 to 80:20 to 40, and relates to a di-dyed polyester yarn in which a part of the copolyester polymer constituting the yarn is reduced.

In addition, the present invention is a general polyester polymer (1) and the copolymerized polyester polymer (2) so that two or more portions of the cationic dye-flammable copolyester polyester polymer (2) extending inward from the outer periphery of the yarn are arranged dispersedly on the cross section of the yarn. ), And then a part of the copolyester polymer (2) is reduced to a method of producing a bistainable polyester yarn.

The present invention provides a multi-tone effect by allowing the copolyester polyester (2) to be dispersed in various parts in the cross section of a yarn in the composite spinning of the general polyester polymer (1) and the cationic dye salt-coating copolyester polymer (2). At the same time, a portion of the copolymerized polyester polymer (2) is exposed to the outer periphery of the yarn, thereby facilitating an alkali weight reduction process for enhancing the multi-tone effect.

The present invention will be described in more detail.

First, in the present invention, the general polyester polymer (1) and the cationic dye-chloride co-polyester polymer (2) are composite spun. The intrinsic viscosity of the general polyester polymer (1) used at this time is 0.65 level, and the copolyester polymer (2) is a copolyester which added the metal sulfonate and / or polyalkylene glycol, As a metal sulfonate 5- Sodium dimethyl isophthalate (hereinafter referred to as DMIS) is copolymerized at a level of 1.5 to 5.0 mol%.

The two kinds of polymers (1 and 2) having different dyeing properties are spun in the form as shown in FIG. That is, composite spinning is performed so that two or more copolyester polymer (2) portions are dispersedly arranged on the yarn cross section. When there are less than two portions composed of the copolyester polyester polymer (2) extending in the inward direction from the outer circumference of the yarn, the multi-tone effect is lowered. It is preferable to disperse | distribute about 10 pieces. However, the present invention does not particularly limit the maximum number of portions composed of the copolyester polymer (2).

Further, the portion composed of the copolyester polyester polymer 2 has a shape similar to a quadrangle on the yarn cross section.

It is preferable to make the weight ratio of the co-polyester polymer (2) in general polyester polymer (1) 60-80: 20-40 in composite spinning. If too much general polyester polymer (1) is used, the multi-tone effect is remarkably reduced. If too much copolyester polymer (2) is used, trimming increases in post-processing such as stretching, resulting in poor operability.

The spinning speed is 800 ~ 1650 m / min and the temperature is 280 ~ 290 ℃.

In the next process, the multi-spun polyester undrawn yarn is drawn at a drawing speed of 800 m / min. At the time of stretching, the temperature of the heating roller is 80 ~ 90 ℃, and the temperature of the heating plate is 120 ~ 130 ℃. However, conditions such as spinning speed, stretching speed and stretching temperature may be changed to appropriate levels as necessary.

In the next step, the stretched polyester yarn is treated with an aqueous alkali solution or the like to reduce some of the copolyester polymer (2) present in the yarn. 4 is an enlarged view of the yarn surface after weight reduction processing.

The weight reduction process reduces a part of the copolyester polymer (2) present in the yarn close to the yarn outer periphery, thereby further enhancing the multi-tone effect.

In general, weight loss processing is performed for about 10 minutes in an aqueous alkali solution such as sodium hydroxide. In case of using aqueous sodium hydroxide solution, dissolve about 50g of sodium hydroxide per liter of water.

In the dichroic polyester of the present invention produced by the method described above, two or more portions of the cationic dye-inflammable copolyester polymer (2) extending inward from the outer circumference of the yarn are dispersed and arranged on the yarn cross-section, and the general poly The weight ratio of the copolymerized polyester polymer (2) in the ester polymer (1) is 60 to 80:20 to 40, and a part of the copolymerized polyester polymer constituting the yarn is reduced.

Such dichroic polyesters of the present invention exhibit very good multi-tone effects upon dyeing. The reason is that the copolyester polymer 2 is dispersed and arranged in various places on the cross section of the yarn. In addition, some of these are adjacent to the outer periphery of the yarn, it is easy to promote the multi-tone effect by the alkali reduction process.

Hereinafter, the present invention will be described in detail through Examples and Comparative Examples. However, the present invention is not limited by the embodiment.

Example 1

800 m / m of polyester polyester (2) copolymerized with general polyester polymer (1) and DMIS 1.5 wt% copolymer so that four parts of the copolymer polyester polymer (2) extending inwardly from the outer circumference of the yarn are arranged on the yarn cross-section. Composite spinning at a spinning speed of minutes produces a polyester undrawn yarn of 120 denier / 48 filaments.

The polyester unstretched yarn is composed of 80% by weight of the general polyester polymer (1) and 20% by weight of the copolymerized polyester polymer (1).

The polyester undrawn yarn is drawn at a draw ratio of 2.0 while passing a heating roller at 87 ° C. and a heating plate at 125 ° C. at a drawing speed of 800 m / min.

The stretched polyester yarn was treated for 10 minutes in an aqueous alkali solution in which 50 g of sodium hydroxide was dissolved in 1 liter of water, and a part of the copolyester polymer (2) was reduced to prepare a dichroic polyester yarn.

Physical properties of the prepared dichroic polyester yarn are shown in Table 2.

Example 2-Example 3

The number of parts of the copolyester polymer (2) dispersedly arranged on the yarn cross section, the general polyester polymer (1): except that the weight ratio and spinning rate of the copolyester polymer (2) were changed as shown in Table 1. A dichroic polyester yarn is manufactured in the same manner as in Example 1.

Physical properties of the prepared dichroic polyester yarn are shown in Table 2.

<Table 1> Manufacturing conditions

Comparative Example 1

Dichroic poly in the same manner as in Example 1, except that the polyester polymer (2) and the general polyester polymer (1) copolymerized with DMIS were arranged in a side by side type as shown in FIG. The ester company is manufactured.

Physical properties of the prepared dichroic polyester yarn are shown in Table 2.

Comparative Example 2

Dichroic polyester yarn in the same manner as in Example 1 except that the polyester polymer (2) copolymerized with 1.5 wt% DMIS and the general polyester polymer (1) were spun in such a manner as to be arranged in a sea island form as shown in FIG. To prepare. Physical properties of the prepared dichroic polyester yarn are shown in Table 2.

Comparative Example 3

Two polyester undrawn yarns of 60 denier / 28 filaments were prepared by spinning the general polyester polymer (1) and the polyester polymer (2) copolymerized with 1.5% by weight of DMIS at a spinning speed of 800 m / min.

After the non-drawn yarns are plyed together, they are drawn at a draw ratio of 2.0 while passing through a heating roller at 87 ° C. and a heating plate at 125 ° C. at a drawing speed of 800 m / min.

These stretched yarns are mixed with an air entanglement device to produce a dichroic polyester yarn. Physical properties of the prepared dichroic polyester yarn are shown in Table 2.

<Table 2> Physical properties of dichroic polyester yarn

Since the dichroic polyester yarn of the present invention is arranged with two or more copolyester polymers (2) dispersed on the yarn cross section, and some of these are adjacent to the yarn outer periphery, various color tones are expressed during dyeing and are excellent in drape. In addition, the manufacturing method of the present invention can produce a dichroic polyester yarn without the entanglement process, thereby reducing the yarn manufacturing cost.

Claims (6)

Composite spinning of the general polyester polymer (1) and the copolymerized polyester polymer (2) such that at least two portions of the cationic dye-flammable copolyester polyester polymer (2) extending inward from the outer periphery of the yarn are arranged to be dispersed on the yarn cross section. After that, a part of the copolyester polymer (2) is reduced. The method for producing a di-stainable polyester yarn according to claim 1, wherein the cationic dye-chloride co-polyester polymer (2) contains 5-sodium dimethyl terephthalate (DMIS). The method for producing a di-dyed polyester yarn according to claim 1, wherein 60 to 80 wt% of the general polyester polymer (1) and 20 to 40 wt% of the copolyester polymer (2) are used for the composite spinning. . The method for producing a dichroic polyester yarn according to claim 1, wherein the part composed of the copolyester polymer (2) is composite-spun so that a portion similar to a quadrangle is formed on the yarn cross section. The method for producing a di-colored polyester yarn according to claim 1, wherein a part of the copolyester polymer (2) is reduced with an aqueous alkali solution. A portion of the cationic dye saltable copolyester polyester polymer (2), which extends from the outer periphery of the yarn to the inside, is dispersed and arranged on the yarn cross section, and the weight ratio of the general polyester polymer (1) to the copolymerized polyester polymer (2) The di-dyed polyester yarn whose value is 60-80: 20-40, and the one part which reduced the co-polyester polymer (2) which comprises a yarn.

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