KR101555099B1 - Polyester composite yarn having excellent shrinkage property and manufacturing mathod thereof - Google Patents

Abstract

This shrink polyester composite yarn of the present invention is excellent in tactile feeling, softness, flexibility, and drape in fabrics and knitted fabrics. In addition, most of these shrinkage composite yarns have almost no appearance defects such as loops and loops.

Description

TECHNICAL FIELD [0001] The present invention relates to a shrinkable polyester sheath type composite yarn having excellent shrinkage property and manufacturing mattod,

More particularly, the present invention relates to a shrinkable polyester composite yarn having excellent tactile feel, softness, body feel, drapeability and excellent shrinkage resistance in fabrics and knitted fabrics. And a method for producing the same.

Ishikuhonten Co., Ltd. is produced by mixing two or more yarns having different export ratios, and then heat-treating the yarn after the post-processing to form crimp with other yarn having a low shrinkage rate So that the irregular crimp appears in the longitudinal direction of the yarn. The property that such a stall should have is that the shrinkage ratio should be high in dry heat or non - water, and should be strong. The fibrillated yarn exhibits a bulky property and soft touch, and knitted or woven fabrics using it are widely used as materials for women's suits, pants, and jackets.

On the other hand, Korean Patent Application No. 1996-0027854 discloses this shrink-wrapped sand yarn, but there is a problem that a lot of loops occur because the heat treatment time of the yarn is different.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a fabric and a knitted fabric which are excellent in soft touch, softness, And a method for producing the same.

In order to solve the above-mentioned problems, the present invention provides a shrink polyester composite yarn wherein the core component is a polyester core and the sheath component is a polyester heat-treated partially stretched yarn (POY).

According to a preferred embodiment of the present invention, the polyester high density housing may have a non-shrinkage ratio of 5 to 20%.

According to another preferred embodiment of the present invention, the polyester high density housing may have a maximum heat shrinkage stress of 0.1 to 0.7 g / d.

According to another preferred embodiment of the present invention, the polyester heat-treated partially drawn yarn (POY) may have a non-shrinkage ratio of from -2 to 5%.

According to another preferred embodiment of the present invention, the polyester heat-treated partial stretching yarn (POY) may have a maximum heat shrinkage stress of 0.01 to 0.1 g / d.

According to another preferred embodiment of the present invention, the core fraction and the supernatant fraction may be composed of 30:70 to 70:30% by weight.

According to another preferred embodiment of the present invention, the total fineness of the composite yarn may be 100 to 300 denier.

According to another preferred embodiment of the present invention, the polyester composite yarn may be an interlace yarn (ITY), an air-jet textured yarn (ATY), a draw texture yarn (DTY), a composite yarn, or a covering yarn.

According to another preferred embodiment of the present invention, there is provided a fabric or knitted fabric comprising the shrinkable polyester composite yarn of the present invention described above.

According to still another preferred embodiment of the present invention, there is provided a method of manufacturing a polyester composite construction, comprising the steps of (1) blending a polyester core with a core component and a polyester- ; And (2) stretching and heat-treating the composite yarn produced through the first godet roller, the heating section, and the second godet roller.

According to another preferred embodiment of the present invention, the polyester high density housing may have a water shrinkage ratio of 5 to 20% and a maximum heat shrinkage stress of 0.1 to 0.7 g / d.

According to another preferred embodiment of the present invention, the polyester heat treated partial stretching yarn (POY) may have a non-shrinkage ratio of from -2 to 5%, and the polyester heat treated partial stretching yarn (POY) And may be 0.01 to 0.1 g / d.

According to another preferred embodiment of the present invention, the first godet roller may have a heat treatment temperature of 110 to 130 ° C, and the heating portion may have a heat treatment temperature of 150 to 180 ° C.

According to another preferred embodiment of the present invention, the heat treatment temperature of the second godet roller may be 30 to 50 ° C.

The shrink polyester composite yarn of the present invention is excellent in touch, softness, body feel and drape in fabrics and knitted fabrics. In addition, appearance defects such as loops and loops appearing in most of these shrinkage composite yarns hardly occur and the quality of the yarn is excellent.

1 is a cross-sectional view of this shrinkage polyester composite yarn according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of this shrinkage polyester composite yarn processing step according to a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to the accompanying drawings.

As described above, conventional polyester composite fabrics have difficulty in excellent tactile feeling, softness, body sensation, and drape in fabrics and knitted fabrics when they are made of knitted fabrics or the like.

Accordingly, the present invention provides a shrink polyester composite yarn in which the core component is a polyester high-density fiber and the sheath component is a polyester heat-treated partially stretched yarn (POY). Accordingly, the shrinkage polyester composite yarn of the present invention is excellent in tactile feel, softness, body feel and drape property in fabrics and knitted fabrics and hardly causes defects.

1 is a cross-sectional view of a shrinkage polyester composite yarn according to a preferred embodiment of the present invention, in which the polyester shrinkage polyester yarn 100 forms a check yarn 110 and a heat- (POY) forms a superpine 120. As a result, the shrinking effect between the shim and the shim can be enhanced, so that the soft touch can be expressed in the fabric. If the examination (110) is a polyester thermally treated part (POY) and the superabsorbent (120) is a polyester heat treated part (POY), the mechanical effect, which is the main effect of the core component and the emulsion side The effect is reversed, and the drape property is lowered, and the touch may become strong.

First, the polyester core housing forming the examination 110 preferably has a non-shrinkage ratio of 5 to 20% and a maximum thermal shrinkage stress of 0.1 to 0.7 g / d. Wherein the non-aqueous shrinkage is a method to determine the degree to which the shrinkage of the yarn, after the sheet of yarns under a load of 100mg / d Sample (L _O) after 20 minutes non-aqueous processing in the tension-free state measuring and non-aqueous processing 100mg / d And the sample field L ₁ is measured under a load of ₁ mm. The non-water shrinkage ratio is calculated by the following equation.

Non-aqueous shrinkage = {sample initial section (L _O) - non-aqueous post-treated sample sheet (L _1)} × 100 / initial sample sheet (L _O)

The heat shrinkage stress is a value that can confirm the degree of shrinkage according to the temperature. The temperature at which the yarn can be minimized and the stress value at that time can be confirmed. If the non-shrinkage ratio of the polyester high- There may be a problem that the difference in shrinkage between the shrinkage is small and the feeling of toughening becomes strong or the drapeability is deteriorated. When the shrinkage difference is more than 20%, a problem of cost increase due to excessive shrinkage may occur. If the maximum heat shrinkage stress is less than 0.1 g / d, the shaft may become too small in the fabric, which may result in strong tactile sensation or poor drapeability. If the heat shrinkage stress exceeds 0.7 g / d, And cost increase may occur.

The polyester thermally treated part stretching yarn (POY) forming the next embossing yarn 110 is formed by heat-treating the partially stretched polyester yarn, and the heat treatment may preferably be performed at 100 to 150 ° C for 0.1 to 3 seconds. The polyester heat treated partial stretch yarn produced through heat treatment preferably has a non-shrinkage ratio of -2 to 5% and a maximum heat shrinkage stress of 0.01 to 0.1 g / d. If the non-shrinkage ratio of the polyester heat-treated part stretch yarn is less than -2%, a problem that an excessive loop may occur may occur, and if it exceeds 5%, there may occur a problem that the shaft difference between the judging and the superposition is decreased. If the maximum heat shrinkage stress is less than 0.01 g / d, the shrinkage characteristics are too weak to cause a problem of poor drape on the fabric. If the shrinkage stress exceeds 0.1 g / d, Lt; / RTI >

Preferably, the screen 110 and the screen 120 may be composed of 30:70 to 70:70% by weight. If the amount of the test 110 is more than 70% by weight, the shrinkage of the final processed paper becomes too high, and the tactile sensation may become hard. If the test paper 110 is less than 30% by weight, the shrinkability of the final processed paper is too low, The characteristics may be too small to be vulnerable to touch.

Meanwhile, the total shrinkage of the shrinkable polyester composite yarn of the present invention may be 100 to 300 denier / 48 to 144 filaments. If the fineness of the composite yarn is less than 100 denier, a problem of cost increase due to a decrease in productivity may arise. If the fineness of the composite yarn is more than 300 denier, the weight of the garment is excessively large.

The shrinkage polyester composite yarn according to the present invention is characterized in that the first yarn is in the form of an interlace yarn, an air-jet yarn, an air-jet yarn, a drawn yarn, (Twisting) yarn, and covering (covering) yarn.

As a result, the shrinkage polyester composite yarn of the present invention can be used mainly as a fabric or a circular knitted fabric, and is excellent in drape, shrinkability, shape stability, and tactile performance.

Next, a method for producing the shrinkable polyester composite yarn of the present invention will be described. In the method for producing the shrinkable polyester composite yarn of the present invention, (1) a polyester core yarn as a core component and a polyester heat-treated partially stretched yarn (POY) as a superfine component are combined to produce a composite yarn; And (2) performing the stretching and heat treatment of the composite yarn through the first godet roller, the heating unit, and the second godet roller.

First, as the step (1), composite yarns are produced by joining a polyester core with a core component and a POY yarn with a heat-treated polyester as a second component. The examination and nuance used at this time are as described above. In the present invention, the present invention does not form a composite yarn by separately stretching and / or heat-treating the nodular or nodular yarn, but forms a composite yarn, followed by stretching and heat treatment. Accordingly, it is possible to reduce the occurrence of loops and loops of the yarn, and it is possible to improve workability and productivity.

Next, the composite yarn produced in step (2) is subjected to stretching and heat treatment through the first godet roller, the heating section and the second godet roller. The composite yarn processing method that can be used in the present invention can be produced by a method capable of composing two or more types of ordinary fibers, preferably air interlaces and air-jet texturing, At least one of the group consisting of air entraining technology using a machine, false twist texturing technology, twisting technology, and covering technology can be selected.

FIG. 2 is a schematic view showing the shrinkage polyester composite yarn according to a preferred embodiment of the present invention, and is mainly described. Firstly passes through the first godet rollers GR1 and GR4 passing through the feed roller 3 in order to stretch the polyester core barrel 1 forming the examination and the polyester heat-treated part stretching yarn 2 forming the superfine do. In this case, the heat treatment is performed. Preferably, the heat treatment temperature may be 110 to 130 ° C. If the heat treatment temperature of the first godet roller is less than 110 ° C, a problem of dyeing non-uniformity may occur. If the temperature is more than 130 ° C, excessive heat treatment may cause a problem of mowing and loops due to partial- .

 The composite yarn passing through the first godet roller (4) passes through the heating section (5). At this time, the temperature of the heating unit 5 may be 150 to 180 ° C. If the heat treatment temperature of the heating portion is less than 150 ° C, a problem of shrinkage nonuniformity may occur. If the heating portion temperature exceeds 180 ° C, excessive heat treatment may occur and a problem of lowered water shrinkage may occur.

The composite yarn passing through the heating section 5 passes through the second godet rollers GR2 and 6. At this time, the second godet rollers GR2 and 6 are not subjected to the heat treatment, and the heat is naturally generated by the gaps, so that the temperature is usually maintained at 30 to 50 deg. The stretching can be performed by the speed difference between the first godet roller 4 and the second godet roller 6, and the preferred stretching ratio may be 1.0 to 2.5, but is not limited thereto. Thereafter, the composite yarn that has passed through the second godet roller 6 reaches the air nozzle 7, forms air entanglement, and then winds up to produce a composite composite construction 8.

Hereinafter, the present invention will be described in detail with reference to Examples and Experimental Examples. The following Examples and Experimental Examples are merely illustrative of the present invention, and the scope of the present invention is not limited to the following Examples and Experimental Examples.

≪ Example 1 >

The shrinkage polyester composite yarn according to the present invention was produced using spin draw composite spinning apparatus having two godet rollers as shown in FIG. Specifically, the examination component is a high shrinkage polyester component having a non-shrinkage ratio of 15% and a maximum heat shrinkage stress of 0.5 g / d, and a superfine component having a non-shrinkage ratio of 2% and a maximum heat shrinkage stress of 0.08 g / POY company. The spinning conditions were as shown in Table 1 below and stretched at a stretching ratio of 1.003 to obtain a polyester core-sheath type conjugate fiber having 240 denier / 96 filaments with 38 wt% of the core component and 62 wt% of the supercritical component. Using the obtained composite fibers as a 100%, they were kneaded with a circular knit fabric, and subjected to salt processing according to normal processing conditions to prepare knit fabrics.

≪ Examples 2 to 10 >

The shrinkable polyester composite yarn was prepared in the same manner as in Example 1, except that it was produced under the same conditions as in Table 1 below.

≪ Comparative Example 1 &

The shrinkage polyester composite yarn was prepared in the same manner as in Example 1, except that a general polyester (Eslon SDY 90/24, manufactured by Woongjin Chemical Co., Ltd.), which was not a high shrinkage polyester, was used for the examination.

≪ Comparative Example 2 &

This shrink polyester conjugate yarn was prepared in the same manner as in Example 1, except that a polyester POY yarn (Eslon SD POY 150/72, manufactured by Woongjin Chemical Co., Ltd.) which had not been heat-treated as a superfine yarn was used.

<Experimental Example>

The following properties of the knitted fabric prepared in Examples 1 to 10 and Comparative Examples 1 and 2 were evaluated, and the results are shown in Tables 1 and 2.

1. Tactile (Softness)

As a result of the sensory test by 10 experts, it was classified as "Excellent" when 8 or more were judged to be good, "Good" when 5 to 7 were judged to be soft, and "Bad" when judging that 5 or less were soft.

2. Drape property

As a result of sensory test by 10 experts, it was judged that 8 or more people had drape, 5 ~ 7 people had drape, and 5 people were drape. Respectively.

3. Non-water shrinkage

After measuring the sample length (L _o ) under a load of 100 mg / d, the yarn was subjected to a non-water treatment for 20 minutes in a non-wet state for 20 minutes and then a sample field (L ₁ ) was measured under a load of 100 mg / d. The water shrinkage ratio is calculated by the following equation.

Non-aqueous shrinkage = {sample initial section (L _O) - non-aqueous post-treated sample sheet (L _1)} × 100 / initial sample sheet (L _O)

4. Maximum heat shrinkage stress

Using a Kanebo heat shrinkage stress meter, 10 cm yarn sampling is performed to adjust the zero point. The tension is given according to the fineness of each yarn, and the temperature is raised up to 300 ° C. and measured five times through the curve of the shrinkage stress according to the temperature.

Tension = fineness × 2/30

5. Yarn loop

The number of loops generated for a yarn of 10 m was evaluated to be 5 or fewer loops: ⊚, less than 5 to 20: ◯, 20 to less than 50 △, and 50 or more ×, and the results are shown in Table 1.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 One) 15 16 15 15 15 15 2) 0.5 0.05 1.01 0.5 0.5 0.5 3) 2 2 2 2 2 8 4) 0.08 0.08 0.08 0.005 0.15 0.07 GR1 (占 폚) 120 120 120 120 120 120 Heating plate (℃) 170 170 170 170 170 170 GR2 (占 폚) 35 35 35 35 35 35 touch Great usually usually Great usually Great Drape Castle Great usually Great usually usually usually Yarn loop ◎ ○ ○ ◎ ◎ ◎

1) Screening shrinkage shrinkage (%)

2) Maximum heat shrinkage stress (g / d)

3) Seaweed shrinkage rate (%)

4) Maximum superficial heat shrinkage stress (g / d)

Example 7 Example 8 Example 9 Example 10 Comparative Example 1 Comparative Example 2 One) 15 15 15 15 - 15 2) 0.5 0.05 0.05 0.5 - 0.5 3) -3 2 2 2 2 - 4) 0.08 0.08 0.08 0.08 0.15 - GR1 (占 폚) 150 120 120 120 150 120 Heating plate (℃) 170 130 200 170 170 170 GR2 (占 폚) 35 35 35 65 35 35 touch usually usually usually usually Bad Bad Drape Castle usually Great usually usually Bad Bad Yarn loop ◎ ○ ○ ○ ○ ○

As can be seen from Table 1, it can be seen that the knit fabrics of Examples 1 to 10 of the present invention are superior in touch, drape and yarn loops as compared with the knit fabrics of Comparative Examples 1 and 2. In addition, Example 1 satisfying the maximum stress condition of the present invention showed excellent physical properties as compared with Examples 2 to 3, which did not satisfy this requirement. In addition, Example 1 satisfying the superabsorbent maximum stress condition and superabsorbent shrinkage rate condition exhibited excellent physical properties as compared with Examples 4 to 7, which did not satisfy this requirement.

The shrink polyester composite yarn of the present invention is excellent in tactile feel, softness, flexibility, and drape in fabrics and knitted fabrics, and can be usefully used in the textile industry due to few drawbacks.

Claims (17)

delete (POY) as a core component and a polyester heat-treated part as a core component,
The polyester high density housing has a non-water shrinkage ratio of 5% to 20% and a maximum heat shrinkage stress of 0.1 to 0.7 g / d,
Wherein the polyester heat-treated partly drawn yarn (POY) has a non-shrinkage ratio of -2% to 5% and a maximum heat shrinkage stress of 0.01 to 0.1 g / d. delete delete delete 3. The method of claim 2,
Wherein the core component and the sub component are composed of 30:70 to 70:30 weight%. 3. The method of claim 2,
Wherein the total fineness of the composite yarn is 100 to 300 denier. 3. The method of claim 2,
Wherein the polyester composite yarn is an ITY (Interlace Yarn), an ATY (Air-jet Textured Yarn), a DTY (Draw Textured Yarn), a composite yarn, or a covering yarn. A fabric comprising the shrinkage polyester sheath type composite yarn of any one of claims 2, 6, 7, 8, 9. A knit fabric comprising the shrinkable polyester core-sheath type composite yarn according to any one of claims 2, 6, 7, 8, In this method for producing a shrinkable polyester core-sheath type composite yarn,
(1) a step of producing a composite yarn by joining a polyester core with a core component and a POY with a polyester component; And
(2) performing the stretching and heat treatment of the composite yarn through the first godet roller, the heating section and the second godet roller,
The polyester high density housing has a non-water shrinkage ratio of 5% to 20% and a maximum heat shrinkage stress of 0.1 to 0.7 g / d,
The polyester heat-treated partially stretched yarn (POY) has a non-shrinkage ratio of -2% to 5% and a maximum heat shrinkage stress of 0.01 to 0.1 g /
Wherein the heat treatment temperature of the heating section is 150 ° C to 180 ° C. delete delete delete delete 12. The method of claim 11,
Wherein the heat treatment temperature of the first godet roller is 110 to 130 占 폚. 12. The method of claim 11,
Wherein the heat treatment temperature of the second godet roller is 30 to 50 占 폚.

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