KR101592602B1 - Silk-like polyester yarn and preparing process thereof - Google Patents

Abstract

The present invention relates to a method for simultaneous entanglement of yarns of a flat cross section and a circular cross section in a collapsed portion through different apostles, which method uses a polyester heterogeneous composite yarn to produce a silk-like polyester The present invention relates to a composite yarn and a production method thereof, wherein the silk-like polyester composite yarn of the present invention is a silk-like composite yarn in which polyester yarns having different cross-sections are entangled, wherein the silk- Of the present invention.
The silk-like polyester composite yarn of the present invention having the above-described structure and the method of producing the same provide a composite yarn by entangling a flat cross-section stretch yarn having a separation degree of 2.5 or more and a circular cross-section non-stretch yarn to form a composite yarn. And a silk luster polyester composite yarn having excellent silk luster with excellent color and drape properties is solved.

Description

TECHNICAL FIELD [0001] The present invention relates to a silk-like polyester yarn and a preparing process thereof,

The present invention relates to a silk-like polyester composite yarn and a method of producing the same, and more particularly, to a method of simultaneously knitting a yarn having a flat cross section and a circular cross section at different yarns through different yarns, To a silk-like polyester composite yarn having excellent color purity, silk gloss and a simple production process, and a method for producing the same.

Conventionally, in order to impart a high level of glue property to polyester fibers to form a silk-like fabric having excellent tactile feel such as silk, there is a method of imitating the gloss of silk by using a triangular cross- However, it is impossible to say that the fabric is stiff and silky-like fabric even though the gloss is similar. Alternatively, two kinds of filament yarns having different shrinkage ratios are mixed or manufactured by composite yarn, A filament yarn having a higher water-shrinking property than a general polyester filament yarn has been developed and commercialized. As the first polymer in the production of the silk-like composite yarn, polyethylene terephthalate or acid dye tallow polyethyleneterephthalate having an intrinsic viscosity of 0.65 is generally used, and as the second polymer which is a part exhibiting high viscosity, polymer polymerization A crystallization inhibitor such as isophthalic acid or phthalic anhydride is added to form an amorphous region in the filament inner structure to form a large shrinkage difference. However, the high shrinkage polymer used as the second polymer in the prior art is not uniform Due to the uneven distribution, the physical properties are uneven and cause defective yarn condition in the spinning stage. When the yarn is used as a slope in fabric production, most of the original shrinkage characteristics are lost due to the sizing temperature or tension during operation I have a bad feeling. There were disadvantages. In addition to the above-mentioned methods, there are various proposals on a method for producing a silk-like fabric. For example, Korean Patent Publication No. 2000-0040007 discloses a method for producing a silk-like fabric in which the core portion of the yarn has a high- Characterized in that the polyethylene terephthalate monofilaments having a different degree of fineness and different in cross section are located on the outer peripheral part of the yarn end face on the basis of the copolyester monofilaments in which the oxide adduct is copolymerized with 5 to 10 mol% Korean Patent Laid-Open Publication No. 2002-0093173 discloses a method for producing a fiber group (Y) obtained by melt extruding a polyester having an intrinsic viscosity of 0.60 to 0.80 in a spinning machine through spinneret and cooling and solidifying the fiber group 1 godet roller 1 and then separated into two groups of fibers Ya and Yb by the quadrant guide 2, The two groups of fibers are stretched by a second godet roller. One group of fibers Ya is rolled at least 4.5 revolutions in the second godet roller and the other group of fibers Yb is wound in a second godet roller at 1.5 revolutions or less Discloses a process for producing a silk-like polyester double-stranded yarn characterized in that two fiber groups are entangled together and wound up. Korean Patent Laid-Open Publication No. 2008-0008742 also discloses " Interlacing is performed using a multifilament yarn and a warp-type cross-section polyester multifilament yarn as a second warp yarn, and the first and second warp yarns each having a total fineness of 40 to 150 denier are used, And a weight ratio of the two yarns is in the range of 35:65 to 65:35. The present invention discloses a method for producing an acetate fiber cloth polyester air entangled yarn exhibiting excellent melange effect The. However, the above-mentioned first method has a complexity of manufacturing process equipment with a composite spinning of a release mold and a circular mold in a cage, and further it is difficult to obtain a sufficient silk-like feeling by only a cross section car. , And the last method is a method of producing a composite yarn in two steps, but both of the three methods presented here are complicated due to the complexity of the manufacturing process, resulting in deterioration of workability, and a problem of silk-like feeling There is still a problem that a desired level of product can not be obtained.

Patent Document 1: Korean Patent Publication No. 2000-0040007 Patent Document 2: Korean Patent Laid-Open Publication No. 2002-0093173 Patent Document 3: Korean Patent Laid-Open Publication No. 2008-0008742

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned technical problems in the prior art, and it is an object of the present invention to provide a polyester composite yarn which has a simple process, excellent in core color and drape, Like polyester composite yarn.

Another object of the present invention is to provide a method for manufacturing a silk-like polyester composite yarn having excellent properties as described above.

The present invention may also be directed to accomplishing other objects that can be easily derived by those skilled in the art from the overall description of the present specification, other than the above-described and obvious objects.

To achieve the above object, the present invention provides a silk-like polyester composite yarn comprising:

In a silk-like composite yarn in which polyester yarns having different cross-sections are entangled,

The silk-like composite yarn is formed by entangling a drawn yarn of a flat cross-section and a non-drawn yarn of a circular cross-section.

According to another aspect of the present invention, the stretched yarn of the flat cross section is characterized by being stretched at a stretching ratio of 1.1 to 2.0.

According to still another aspect of the present invention, the stretched yarn of the flat cross section is characterized by having a deformation degree (width / height ratio) of more than 2.5 as microfine yarns.

According to still another aspect of the present invention, the single-yarn fineness of the flat cross-section yarn is not more than 0.7 denier.

According to another aspect of the present invention, there is provided a method of producing a silk-like polyester composite yarn,

Radiating a flat cross-section yarn from a flat cross-section having a degree of dissociation greater than 2.5, and radiating a circular cross-section yarn from the round cross-section;

Wherein said radially flattened cross-section yarns stretch the normal apostoles at a stretch ratio of 1.1 to 2.0, while said circular cross-cut yarns form non-stretch yarns through a bypass apostrophe;

And a step of producing a composite yarn by interlacing and fusing a flat cross-section yarn and a circular cross-section yarn crossing the general apostolate and the Bypass apostolate in the collapsed portion.

According to another aspect of the present invention, in the forming of the drawn yarn and the non-drawn yarn, each of the radiating flat section yarns is formed by stretching at a draw ratio of 1.1 to 2.0 while passing through four godet rollers, And then passing through the godet roller so as to be non-stretched.

According to still another aspect of the present invention, the stretched yarn of the flat cross section and the non-stretched yarn of the circular cross section are manufactured such that the Godet roller is driven at a production speed of 4500 to 5500 mpm.

The silk-like polyester composite yarn of the present invention having the above-described structure and the method of producing the same provide a composite yarn by entangling a flat cross-section stretch yarn having a separation degree of 2.5 or more and a circular cross-section non-stretch yarn to form a composite yarn. And a silk luster polyester composite yarn having excellent silk luster with excellent color and drape properties is solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a process of manufacturing a silk-like polyester composite yarn according to a preferred embodiment of the present invention,
2 is a cross-sectional view of a flat cross section showing an example of a preferable cross section of a flat cross section yarn constituting the composite yarn of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will hereinafter be described in more detail by way of preferred embodiments with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a process of manufacturing a silk-like polyester composite yarn according to a preferred embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a preferred embodiment of a flat cross- FIG.

As shown in the figure, the production of the silk-like polyester conjugate yarn of the present invention is carried out in such a manner that the molten polymer (A) for flat cross-sectional yarn use and the circular cross-sectional yarn Of the molten polymer (B) is spun through each nip.

After passing through the emulsion applying device (not shown), the flat section yarns and the circular section yarns solidified by the cooling wind after the spinning are allowed to smoothly control yarn travel and tension on the godet rollers in the first swing portion 2, And the primary entanglement is carried out at a pressure of 0.2 to 2.0 kg / cm < 2 > to increase the uniformity of entanglement in the hybridization. If the air pressure is less than 0.2 kg / cm 2, the effect of entanglement is reduced. If the air pressure is more than 2.0 kg / cm 2, excessive air pressure may cause the uniaxial thread, which is undesirable.

The flat cross section passed through the first interchanging section 2 is subjected to a three-godet roller 5 having a temperature of 80 to 150 DEG C after being rotated a number of times by a first godet roller 3 and a second godet roller 4 at 70 to 110 DEG C, The draw ratio of the first godet roller 3 and the third godet roller 5 is set to 1.1 to 2.0 and the three godet roller 5 is rotated at the same speed as that of the first godet roller 5, The speed is 4500 to 5500 mpm. By doing so, it is possible to produce a flat cross-section yarn without under-drawing.

According to a preferred embodiment of the present invention, the circular cross section constituting the composite yarn of the present invention comprises a non-heated five godet roller 7 and a four godet roller 6 separately provided on the upper portion of the godet roller 3 , Wherein the roller speed is 4500 to 5500 mpm, and no over feed is required. Particularly, if the production rate of the four godet roller 6 according to the present invention exceeds 5500 mpm, the microfiber workability of the ordinary gods is lowered, and if it is less than 4500 mpm, The durability is lowered, that is, the force of the fabric is lost, which is not preferable.

 According to a preferred embodiment of the present invention, the flat cross section yarns and the circular cross section yarns are secondarily entangled with each other at a pressure of 3.0 to 6.0 kg / cm 2 in the second interchanging section 8. At this time, when the number of interlocking yarns of the composite yarn is 35 or less per m, defective fusion is caused, which is not preferable.

According to another preferred embodiment of the present invention, it is particularly preferable that the flat cross-section yarn of the present invention is stretched at a stretch ratio of 1.1 to 2.0. If the stretch ratio is less than 1.1, . On the other hand, if the stretching ratio is more than 2.0, the core color and drape property are deteriorated.

According to another preferred embodiment of the present invention, the stretched yarn of flattened cross section has a degree of uniaxiality of 2.5 or more, which is the aspect ratio of the microfine yarn. If the degree of dissociation is less than 2.5, the silk touch will not occur, the diffused reflection effect of the flat cross-section yarn will be lowered, and silk gloss will not be obtained.

According to a preferred embodiment of the present invention, the single-strand fineness of the flat cross-section yarn is not more than 0.7 denier. If the single-filament fineness exceeds 0.7 denier, the feel of the flattened cross-

As described above, the composite yarn of the present invention is composed of a flat cross-section of microfiber yarn and has excellent touch feeling and has a silky touch. Further, since the composite yarn of the present invention is composed of unextracted circular cross-section yarns, the crystallinity is high due to the high production rate though the orientation is low, but the cardiovascular property is excellent according to the low orientation, And exhibits a silky gloss and texture.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to these Examples

Example 1

Polyester having an intrinsic viscosity (?) Of 0.652 having a titanium dioxide content of 0.4% by weight was spun at a spinning temperature of 285 占 폚, emulsified with an emulsion and radiated at a speed of 4,000mpm at a godet roller to obtain 50 denier 96 An 85 denier circular cross-section yarn wound at 4,600 mpm was passed through a pillared flat cross section and a separate bypassed apostrophe at a speed of 4,600 mpm. The degree of deformation of the flat cross section yarn was 3.0, and the thus obtained composite yarn was twisted at a speed of 350 T / m, and a fabric having silk luster was produced by a conventional method. The gloss, And the results are shown in Table 1 below.

Example 2

A fabric was produced in the same manner as in Example 1, except that the godet roller was wound at a speed of 5,300 mpm through the bypass conveyed in Example 1.

Example 2

A fabric was produced in the same manner as in Example 1, except that the flatness cross-section yarn in Example 1 was 4.0.

Comparative Example 1

A fabric was produced in the same manner as in Example 1, except that the circular cross-section yarn was taken up by a godet roller through a general apical not by a bypass ape.

Comparative Example 2

A fabric was produced in the same manner as in Example 1, except that the circular cross-section yarn in Example 1 was wound on a godet roller through an ordinary apical scepter rather than a bypass ape, and a yarn of 75 denier 36 pillar (single yarn fineness of 2.0 denier) was used.

Comparative Example 3

A fabric was produced in the same manner as in Example 1 except that the godet roller was wound at a speed of 3,800 mpm through the bypass belt in Example 1.

division Glossy and sexy touch Drape Castle Example 1 ○ ○ ○ Example 2 ◎ ○ ◎ Example 3 ◎ ◎ ○ Comparative Example 1 X X ○ Comparative Example 2 X X ○ Comparative Example 3 ○ ○ X

1 --- spinning detention 2 --- first interchange
3 --- 1 Godet roller 4 --- 2 Godet roller
5 --- 3 Godet roller 6 --- 4 Godet roller
7 --- 5 Godet roller 8 --- 2nd alternation

Claims (7)

delete delete delete delete A method for producing a composite yarn by spinning a molten polymer, respectively, in a nip having a separate nipping cross section, said method comprising:
Radiating a flat cross-section yarn from a flat cross-section having a degree of dissociation greater than 2.5, and radiating a circular cross-section yarn from the round cross-section;
After the radiated yarn is solidified by cooling air and passed through the emulsion applying device, the yarn travelability and tension control on each godet roller on the first wedge portion is improved to prevent the occurrence of loops and to increase the uniformity of the entanglement Performing primary entanglement at a pressure of 0.2 to 2.0 kg / cm 2;
The above-mentioned flattened cross section yarn is passed through a single godet roller at 70 to 110 DEG C and a godet roller at 80 to 150 DEG C after several rotations at 2 godet roller and a general godet roller using a spin draw path which rotates several times to a non- The stretch ratio is 1.1 to 2.0, while the circular cross section is formed as a non-stretchable yarn through a bypass gusset using a non-heated 5 godet roller and a 4 godet roller separately provided on the upper godet roller;
Wherein the step of forming the composite yarn comprises the step of cross-linking the flat cross-section yarn and the circular cross-section yarn crossing the general apostrophe and the bypass apostrophe at the collapsed portion to produce a composite yarn.
delete [6] The method according to claim 5, wherein the stretched yarn of the flat cross section and the non-stretched yarn of the circular cross section are manufactured such that the godet roller is driven at a speed of 4500 to 5500 mpm.

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