KR20120055966A - Polyester yarn having an excellent thin and thick effect and preparing process thereof - Google Patents

Abstract

PURPOSE: A method for fabricating polyester conjugated yarn is provided to simplify production process and to express gradation by natural twisting. CONSTITUTION: A method for fabricating polyester conjugated yarn with excellent gradation effect comprises a step of spinning yarn grey yarn from two spinnerets(1) with circular or modified cross-section; a step of drawing one spun yarn in 1.1-4.0 of spinning ratio to form a complete spun yarn; a step of forming partial spun yarn through bypass using the other yarn; and a step of confounding the complete spun yarn and partial spun yarn to form complete yarn.

Description

Polyester yarn having an excellent thin and thick effect and preparing process

The present invention relates to a polyester composite yarn having excellent light effect, and a method of manufacturing the same, and more particularly, a method of producing a composite yarn by one step by a method of simultaneously entangled yarns at different parts through different yarns. The present invention relates to a polyester composite yarn and a method for producing the same, which are simple in the production process and excellent in gloss and drape, as well as a lightening effect.

Woven fabrics and knitted fabrics made of general synthetic fibers have been deteriorated in quality in appearance and feel compared to fabrics and knitted fabrics made of natural fibers. However, in recent years, synthetic fibers have been used to pursue the appearance and feel of natural fibers. In order to improve the color depth, feel, drape and lightness effect, various methods have been proposed. For example, a method of manufacturing a polyester yarn having a difference in dyeing concentration is a high viscosity / low viscosity poly One example using an ester latent yarn single yarn has been known. For example, Japanese Laid-Open Patent Publication No. 2000-160443 includes ethylene terephthalate units and comprises only high viscosity polyester and ethylene terephthalate units copolymerized with a third component. A conjugated conjugate fiber of low viscosity polyester is disclosed. However, the composite fiber is cooled and released at a predetermined withdrawal speed to improve elasticity, but expresses a dyed gray tea only with high viscosity and low viscosity polyester latent crimping yarn, which is expensive because it is produced as a single yarn, and the fabric produced thereby The touch has a hard problem.

As another example, Korean Laid-Open Patent Publication No. 2000-0025004 discloses that "a cationic dye-inflammable polyester multifilament unstretched yarn is drawn through a hot pin having slits formed on its surface to form a posture portion. Cold-drawn ordinary polyester multifilament unstretched yarn at room temperature, and after twisting the two yarns with air through a first heater at room temperature, false twisting, and then overheating the heated second heater It is disclosed that the method of manufacturing a polyester composite fabrication, characterized in that the winding while passing through the feed ", but the method has a disadvantage of low productivity in a two-step method, Korean Patent Publication No. 2003-0054569 "In manufacturing polyester drawn yarn by direct spin draw process, the rotation speed of the gear pump can be changed by the controller. A non-uniform impregnating yarn is applied to the yarn immediately after spinning using an emulsion attaching device, and then stretched and heat treated between the first go roller and the second go roller, followed by winding on a winder. The manufacturing method of the company ", but this method has a disadvantage in that the appearance of the shade effect is low due to the irregular adhesion of the emulsion and difficult to operate the equipment, as another example, Korean Patent Publication No. 2003-0062684 by the present applicant, "In the manufacturing method of the polyester posture yarn using the direct-stretch drawing method, the polyester polymer with the intrinsic viscosity of 0.64-0.67 is discharged using the spinneret for the use of a sectional cross-section having a shape coefficient of 1.1 or more, and the discharged filament is 45? Draw ratio between the first high speed roller having a drawing temperature of 55 ° C and the second high speed roller having a heat treatment temperature of 75 to 85 ° C 1.4 It is disclosed that "a method of manufacturing a polyester posture yarn characterized by stretching at 2.0 times", but the above method produces a posture yarn by lowering the draw ratio, so that the appearance of the posture part is not natural and the expression frequency of the taisum part is low, thereby providing an excellent joke effect. There is still a disadvantage of not being able to get it.

Patent Document 1: Japanese Unexamined Patent Publication No. 2000-160443 Patent Document 2: Republic of Korea Patent Publication No. 2000-0025004 Patent Document 3: Republic of Korea Patent Publication No. 2003-0054569 Patent Document 4: Republic of Korea Patent Publication No. 2003-0062684

Accordingly, the present invention has been made in view of the above technical problems in the prior art, and the main object of the present invention is to simplify the process using a polyester composite yarn, and thus have excellent equipment operation and productivity, and a high frequency of expression of the TaeSum part. The present invention is to provide a polyester composite yarn which is excellent in the appearance of the lightening effect and also has excellent color depth and drape.

Another object of the present invention is to provide an easier manufacturing method of a polyester composite yarn having excellent light and gray effect having the above excellent characteristics.

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.

Polyester composite yarn excellent in light and shade effect of the present invention for achieving the above object;

In the composite yarn focusing on polyester yarn,

The composite yarn is characterized in that the stretched yarn of a circular or shaped section and the non-drawn yarn of a circular or shaped section are formed without undergoing a separate yarn processing process such as drawing or twisting.

According to another configuration of the present invention, the drawn yarn is characterized in that it is drawn at a draw ratio of 1.1 to 4.0.

According to another configuration of the present invention, the fineness of the drawn yarn and non-drawn yarn is characterized in that 0.5 to 4.0 denier.

Method for producing a polyester composite yarn excellent in light and shade effect of the present invention for achieving the above another object;

Spinning yarns respectively from two spinnerets of circular or unshaped cross section respectively;

Forming one of the radiated yarns into a fully drawn yarn at a draw ratio of 1.1 to 4.0 through a general yarn, and the other yarn as a partially drawn yarn of a draw ratio 1 through a bypass yarn; and ;

It characterized in that it comprises a step of producing a composite yarn by entangled mixed yarns in the entanglement with the complete stretched yarn and the partial stretched yarn passed through the general and bypass yarns.

According to another configuration of the present invention, the forming step of the fully drawn yarn and partially drawn yarn is formed by stretching the drawn yarn at a draw ratio of 1.1 to 4.0 while passing through the four gourd rollers, respectively, the other The yarn of is characterized in that it is configured by passing through the two rollers to form a partially drawn yarn of the draw ratio 1.

According to another configuration of the present invention, the heat treatment temperature of the yarn is characterized in that it is carried out at a temperature not exceeding 60 ℃.

According to another configuration of the present invention, the fully drawn and partially drawn yarn is characterized in that the high-speed roller is manufactured by driving at a production speed of 2500 to 4500mpm.

According to another configuration of the present invention, the focusing pressure of the stretched yarn and the non-drawn yarn is characterized in that it does not exceed 1.0kg / ㎠.

Polyester composite yarn excellent in the light and shade effect of the present invention configured as described above and a method for manufacturing the composite yarn by a low concentration pressure without heat treatment the fully drawn yarn by the general yarn and the partially drawn yarn by the bypass yarn 1 Since it is produced in stages, the production process is simplified and natural shade is not only excellently expressed, but also provides a polyester composite yarn having a soft touch, deep color, and drape, thereby solving the above-mentioned problems. .

1 is a process schematic diagram schematically showing one process of manufacturing a polyester composite yarn having excellent light effect according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail by a preferred embodiment.

1 is a process schematic diagram schematically showing one process of manufacturing a polyester composite yarn having excellent light effect according to a preferred embodiment of the present invention.

As shown in the figure, the production of the polyester composite yarn having excellent light effect of the present invention is first used for the use of a molten polymer (A) of circular or cross-sectional yarns in a mold having a separate mold cross section located in one radiator 1 ) And (B) are spun through each detention. After spinning, the yarn solidified by cooling wind passes through an emulsion donor (not shown), and then, in the first entanglement section 2, improves sand running and tension control on each high roller, thereby preventing loops and entangled when intermixing. In order to increase the uniformity of the primary immersion is carried out at a pressure of 0.2 to 2.0 kg / ㎠. If the air pressure is less than 0.2kg / cm 2, the entanglement effect is reduced, and if the air pressure is more than 2.0kg / cm 2, short cutting occurs due to excessive air pressure, which is undesirable.

One yarn that passed through the first entangled portion 2 is a three-high roller (5) and a non-heated four-high roller (set) that do not exceed 60 ° C after several rotations in the first high roller (3) and the second high roller (4). 6) It is manufactured in the fully drawn yarn using the yarn pass with the existing spinner rotated several times. At this time, the draw ratio of the 1 gourd roller (3) and the 3 gourd roller (5) is 1.1 to 4.0, and the 3 gourd roller (5) The speed is set to 2500 to 4500mpm. In this way, a fully drawn yarn without undrawn can be produced.

In addition, according to a preferred embodiment of the present invention, the partially drawn yarn constituting the composite yarn of the present invention comprises a non-heated 5 gourd roller 7 and a 4 gourd roller 6 separately installed on the top of the gourd roller 3. 4 high roller speed is 2500 to 4500mpm and the overfeed is not required. Particularly, if the production speed of the fourth roller 6 in accordance with the present invention exceeds 4500mpm, the effect of partial stretched yarn is lowered, which is not preferable.

Further, according to another preferred embodiment of the present invention, the fully drawn yarn and the partially drawn yarn are secondaryly entangled at a pressure not exceeding 1.0 kg / cm 2 at the second entangled portion 8, wherein the concentration pressure increases when the concentration is increased. Is remarkably disappeared, and the above-mentioned pressure is used, so that a natural light effect of the far-end surface can be expressed, which is preferable.

According to another preferred embodiment of the present invention, it is particularly preferred that the flat cross section yarn of the present invention is drawn at a draw ratio of 1.1 to 4.0, if the draw ratio is less than 1.1, it is not possible to obtain a soft touch and excellent shade effect. On the contrary, when the draw ratio exceeds 4.0, the deep color and drape are lowered, which is not preferable.

According to another preferred embodiment of the present invention, when using a release cross section as the yarn, it is preferable to increase the release degree, which is the aspect ratio, to be larger than 2.5. By doing so, the texture of the fabric can be excellent, and there is an advantage of increasing the diffuse reflection effect.

According to a preferred embodiment of the present invention, the single yarn fineness of the yarn is not particularly limited, but is preferably 0.7 to 4.0 denier.

As described above, since the composite yarn of the present invention sets the temperature of the three gourd rollers to not exceed 60 ° C and operates below the glass transition temperature, the composite yarn is naturally mixed with the partially drawn yarn while the shrinkage occurs in the salt processing process, so that the shade effect is excellent. In addition, most of the composite yarn is generally subjected to a four-step process such as stretching, flammable, etc., the composite yarn according to the present invention is not configured to go through a separate post-process and thus apply the composite yarn of the present invention to fabrics and knitted fabrics without the post-process In this case, the natural twist of the fully drawn yarn and the partially drawn yarn may result in an excellent tint effect.

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

Extreme Density (η) = 0.452% of titanium dioxide, spinning at 285 ℃ of spinning temperature, and then emulsified and spun at high speed roller at 2,500mpm, 50 denier wound at 4,000mpm 36 A composite yarn was prepared by mixing a circular circular section yarn and a circular section yarn of 85 denier 36 pillars wound at a speed of 4,0000 mpm in a high-speed roller through a separate bypassed yarn. At this time, the heat treatment temperature was 60 ° C. and no entanglement pressure was given. The composite yarn thus obtained was spun at a rate of 350T / m, and then a fabric having a light gray effect was manufactured by a conventional method. The gloss and color, touch, drape, and light effect of the fabric were measured and the results were measured. The following Table 1 shows.

Example 2

A fabric was prepared in the same manner as in Example 1 except that the winding was carried out at a speed of 4,500 mpm in a high speed roller in Example 1.

Example 2

A fabric was prepared in the same manner as in Example 1 except that the circular cross-section yarn was used as a release cross-section yarn of 4.0.

Comparative Example 1

In Example 1, except that the circular cross-section yarn is wound with a high roller through a general yarn instead of a bypass yarn, the fabric was prepared in the same manner as in Example 1.

Comparative Example 2

In Example 1, a fabric was manufactured in the same manner as in Example 1 except that a circular cross section yarn was used with a high-density roller 75 denier 36 pillars (2.0 denier single yarn) through a general yarn instead of a bypass yarn.

Comparative Example 3

A fabric was prepared in the same manner as in Example 1, except that the roller was wound at a speed of 1,800 mpm in a high speed roller in Example 1.

division Gloss and deep color touch Drape Castle Example 1 ○ ○ ○ Example 2 ◎ ○ ◎ Example 3 ◎ ◎ ○ Comparative Example 1 X X ○ Comparative Example 2 X X ○ Comparative Example 3 ○ ○ X

1 --- Spinner 2 --- First entanglement
3 --- 1 gore roller 4 --- 2 gore roller
5 --- 3 High Rollers 6 --- 4 Rollers
7 --- 5 gore rollers 8 --- 2nd entanglement

Claims (8)

In the composite yarn focusing on polyester yarn,
The composite yarn is a polyester composite yarn having excellent light effect, characterized in that the non-drawn yarn of the circular or deformed cross-section and the non-drawn yarn of the circular or deformed cross section is formed without going through a separate yarn processing process, such as drawing or flammable.
According to claim 1, wherein the drawn yarn polyester composite excellent in light and gray effect, characterized in that the drawn ratio of the draw ratio of 1.1 to 4.0.
According to claim 1, The fine yarn fine polyester composite yarn, characterized in that the fineness of the drawn yarn and non-drawn yarn is 0.5 to 4.0 denier.
Spinning yarns respectively from two spinnerets of circular or unshaped cross section respectively;
Forming one of the radiated yarns into a fully drawn yarn at a draw ratio of 1.1 to 4.0 through a general yarn, and the other yarn as a partially drawn yarn of a draw ratio 1 through a bypass yarn; and ;
The method of producing a polyester composite yarn having excellent light to light effect, characterized in that the composite yarn and the cross-stitched yarn after passing through the general yarn and the bypass yarn is mixed in the entanglement to produce a composite yarn.
5. The method of claim 4, wherein the forming step of the fully drawn yarn and partially drawn yarn is formed by stretching the yarn with one drawn yarn at a draw ratio of 1.1 to 4.0 while passing through the four gourd rollers, respectively. Sasa is formed by passing through the two roller rollers to form a partially drawn yarn of the draw ratio 1, the manufacturing method of the polyester composite yarn excellent in light and gray effect.
5. The method of claim 4, wherein the heat treatment temperature of the yarn is performed at a temperature not exceeding 60 ° C. 6.
The method of claim 4, wherein the fully drawn and partially drawn yarns are manufactured by driving the high-speed rollers at a production speed of 2500 to 4500 mpm.
The method of claim 1, wherein the focused pressure of the stretched yarn and the non-drawn yarn is controlled so as not to exceed 1.0 kg / cm 2.

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