KR19980060379A - Manufacturing method of double shrinked blended yarn with excellent volume - Google Patents

Abstract

The present invention relates to a method for producing biaxial blended fiber having excellent volume.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a bishrink blended yarn having a good surface protruding effect and bulkiness by improving the shrinkage effect when heat-treated in a post-treatment process by knitting the bishrink blended yarn.

According to the present invention, the screening and effect yarns are simultaneously heat treated and elongated and entangled in a fluid treatment device. In the method of manufacturing a biaxial blended fiber, the effect yarns are spun at a spinning speed of 1,900 to 4,500 m / min and have a birefringence (Δn). A polyester yarn manufactured from 20 x 10 ^{-3 to} 110 x 10 ^-3 unstretched yarn and subjected to a formal heat treatment process, wherein the screening is carried out with a 8 to 15% molar ratio of isophthalic acid having a high shrinkage component. By blending them with each other using a high-shrink polyester yarn copolymerized with a polymer, there is provided a method for producing a bishrink blended yarn excellent in volume sense suitable for the purpose of the present invention.

Description

Manufacturing method of double shrinked blended yarn with excellent volume

The present invention relates to a method for manufacturing biaxial blended yarn having excellent volume, and the unstretched yarn groups having different physical properties are drawn under different conditions on a drawing machine, mixed with a tanning with an emulsion treatment device, and then knitted in a post-treatment process. The present invention relates to a method for producing a polyester blend fiber having excellent surface protruding effect and bulkiness when subjected to heat treatment.

This shrink shrink blended yarn is interwoven with two or more kinds of yarns with different export rates, and when heat-treated in the post-processing process, the yarn with high shrinkage shrinks a lot, causing other yarns with low export rates to form crimps. As a result, irregular crimps appear in the longitudinal direction of the yarn. The properties of such high shrinkage yarns should be excellent in strength and high shrinkage in dry heat or nonaqueous water. Since the blended yarn is bulky and soft to the touch, the woven and knitted fabrics are used as a material for women's suits, pants and jackets.

In order to manufacture such biaxially blended yarn, conventionally, an undrawn yarn having a different boiling water shrinkage ratio has been prepared and then drawn by a drawing method. However, this method of manufacturing shrink shrink blended yarn has a disadvantage of complicated process, high production cost, and high energy consumption.

In addition, various methods are known, such as a method of compounding a general polyester cold-drawn yarn and a method of simultaneously stretching and compounding a low-speed yarn and a high-speed yarn.

However, in the method of combining cold drawn and hot drawn yarns, the yarn shrinkage of cold drawn yarns is great, but after receiving heat in the post process, the shrinkage force is greatly reduced, which is less effective on the fabric. There was. In addition, the method of stretching the low-radiant yarn and the high-radiant yarn at the same time is the same stretching ratio, when the high-orientated yarn and the low-orientated yarn are drawn at the same length, the high-orientated yarn can be drawn at the same draw ratio, but the low-orientated yarn is irregular due to the relatively low draw ratio. Part occurred. In addition, in the case of these methods, shrinkage difference between cold drawn yarn and hot drawn yarn or low-speed yarn and high-speed yarn occurs during the progress of the twisted yarn by the twist-fixing process, so that there may be a discoloration difference between them in the dyeing process. Because of the large deviation, the possibility of slanted line due to tension deviation was high during the post-sizing process. In addition, when heat treatment was performed in these post-processes, the shrinkage effect of the screening and effect yarns in the shrinkage process of the high shrink yarn was less.

It is an object of the present invention to provide a method for producing bishrink mixed fiber having excellent volumetric shrinkage effect when heat treatment is performed in a post process by mixing the effect yarn with high shrinkage and the effect yarn given with low shrinkage and spontaneous elongation.

Another object of the present invention is to stabilize the effect yarn on the yarn to reduce the occurrence of the color shift between the screening and the effect yarn during the post-processing, the inclination lines due to the tension deviation during the process of their call.

According to the present invention, an effect yarn having low shrinkage and spontaneous elongation characteristics through a formal heat treatment process and a high shrinkage yarn copolymerized with isophthalic acid having a high shrinkage component are mixed with each other, thereby resulting in improved volumetric shrinkage effect. A method for producing this excellent biaxial blended fiber is provided.

This shrinkage blended yarn is manufactured by using low shrinkage yarn as the effect yarn and high shrinkage yarn as the screening.

According to the present invention, the effect yarn is spun at a spinning speed of 1,900 to 4,500 m / min and is made of a high orientation undrawn yarn having a birefringence (Δn) of 20 × 10 ^{−3 to} 110 × 10 ⁻³ , which is then a drawing machine. By passing through a heating roller and a heating plate and passing through a heat treatment step, the raw material properties of the unstretched yarn are stabilized before being mixed with the yarn. As such, when the physical properties of the effect yarn are stabilized on the yarns, problems due to physical property deviations in the post process are improved. In addition, the heat treatment process provides the effect of low shrinkage and spontaneous elongation.

Here, the tension applied to the effect yarn on the stretching machine during the formal heat treatment process is based on 15 ~ 45g, the draw ratio to satisfy this is as follows.

Here, NDR represents a natural draw ratio. Draw ratio If lower, the heat treatment process is poor due to tension decrease during heat treatment, and there is a risk of dying lines during fabric dyeing after fabric processing due to uneven shrinkage of the effector. If higher, the effector spontaneous elongation effect is not expressed due to the increase in the orientation of the effect yarn and the reduction of the non-crystalline portion.

In addition, the heat treatment temperature of the effect yarn during the formal heat treatment process is as follows.

Tg + 25 ≤ T1 ≤ Tg + 60 ° C

Tc + 25 ≤ T2 ≤ Tc + 60 ° C

Here, T ₁ represents a heating roller temperature, T ₂ represents a heating plate temperature, Tg represents a glass transition temperature, and Tc represents a crystallization temperature.

When the temperature of the stretched heating roller is lower than Tg + 25 ℃, the thermal stability of the effect yarn is lowered, the dyeing instability is increased, and when the stretching heating roller is higher than Tg + 60 ℃, fusion occurs on the surface of the rollers cause a process failure. In addition, when the stretched heating plate temperature is higher than Tg + 60 ° C., the effect yarn is overcrystallized due to high temperature heat setting, and thus, post-process heat treatment spontaneous elongation is not only lowered, but also causes a decrease in texture of the fabric.

The wet heat and dry heat shrinkage of the effect yarn thus obtained are measured as follows.

-5% ≤ Sw ≤ 0%

-10% ≤ Sd ≤ 0%

Here, Sw is the shrinkage after immersion for 30 minutes in 100 ℃ boiling water under no tension, Sd is the shrinkage after dry heat for 30 minutes at 180 ℃ Oven under tension (2g / De for measurement) Indicates.

On the other hand, in the case of screening, a high shrink polyester yarn copolymerized with isophthalic acid having a high shrinkage component in an 8 to 15% molar ratio is used. Maximize the length difference to have a high bulkiness.

The bi-shrink blended yarn manufactured as described above is stable in physical properties of the effect yarns, and the difference in length between the effect yarns and the yarns is maximized, thereby improving the volume of the fabric.

Hereinafter, the present invention is performed and the results are shown in a table, but the present invention is not limited to the present embodiment.

Bishrink horn fiber yarn production example and comparative example

TABLE 1

* SDY: Spindraw Yarn, and spinning speed refers to spinning speed in normal Spindraw Yarn spinning machine.

* POY: Semi-yeon gentleman, UDY: Un-yeon gentleman

After preparing the biaxially woven fiber as shown in Table 1, a biaxially woven fiber was produced as shown in Table 2.

TABLE 2

Table 3 shows the results of analyzing the biaxially mixed interwoven fabrics prepared in Table 2.

TABLE 3

The bilateral difference (ΔE) represents the dyeing difference between the effector and the screening, and when ΔE 0.2, the color difference can be determined by visual judgment.

(L: Lightness, a: Red-Green, b: Yellow-Blue, L, a, b are the color values of the left side of the fabric, L ₀ , a ₀ , b ₀ are the color values of the right side of the fabric)

As can be seen from Table 1 to Table 3, the effect heat treatment of the effect yarn in accordance with the present invention can be seen that the difference in the length difference between the screening and the effect yarn is improved, and their discoloration difference is also significantly reduced.

According to the present invention, a method of manufacturing a biaxial blended yarn with improved shrinkage effect when heat-treated in a post process is produced by interweaving an effect yarn provided with low shrinkage and spontaneous elongation and a screening yarn having high shrinkage. .

As a result, when the weave and knit fabric are manufactured using the biaxial blended yarn, the difference between the lengths of the screening and the effect yarn in the weave and knitted fabric is expressed as much as possible, and takes a helix like wool. Therefore, the woven and knitted fabric has excellent bulky properties and expresses the texture of natural wool with a soft touch and excellent surface protruding effect, and thus can be used in various materials such as women's suits, pants, and jackets.

In addition, by stabilizing the effect yarn on the yarn, it is possible to improve the problems such as the difference between the discoloration between the screening and the effect yarn generated during the post-process, the possibility of the generation of the slanted line due to the tension deviation during the call process.

Claims (2)

In the method of manufacturing a biaxially blended yarn in which a entanglement is imparted in a fluid treatment device at the same time as a screening composed of a high shrinkage yarn and an effect yarn consisting of a low shrinkage yarn, the effect yarn is spun at a spinning speed of 1,900 to 4,500 m / min, and thus the birefringence (Δn) is increased. It is made of unstretched yarn of 20 × 10 ^{-3 to} 110 × 10 ^-3 , and then subjected to formal heat treatment according to the following conditions, and the screening is copolymerized with isophthalic acid of high shrinkage component at 8 to 15% molar ratio. Method for producing a bulky two-shrink blended yarn characterized in that the high shrink polyester sign: -The tension applied to the effect yarn on the stretching machine during the heat treatment process is based on 15 ~ 45g, -The draw ratio to satisfy this , -The heat treatment temperature of the effector Tg + 25 ≤ T ₁ ≤ Tg + 60 ° C Tc + 25 ≤ T ₂ ≤ Tc + 60 ℃, Where NDR is the natural draw ratio, T ₁ is the heating roller temperature, T ₂ is the heating plate temperature, Tg is the glass transition temperature, and Tc is the crystallization temperature. The method of claim 1, wherein the physical properties of the effect yarn obtained are as follows. -Sw is the shrinkage rate after immersion for 30 minutes in boiling water at 100 ℃ under no tension. (Super load 2g / De when measuring) -5% ≤ Sw ≤ 0%, -Sd, shrinkage rate after drying for 30 minutes in 180 ℃ oven under no tension (Super load 2g / De when measuring) −10% ≦ Sd ≦ 0%.