KR20160128500A - High elastic full dull polyester composite, and preparation method of fabric using the same - Google Patents

Abstract

The present invention relates to a high-elasticity polyester composite yarn using a latent-crimp yarn as a core and using a matt polyester yarn as a sheath, and relates to a manufacturing method thereof. More specifically, the present invention relates to a matt high-elasticity polyester composite yarn having price competitiveness and having excellent tactility, bathochromic properties, and high elasticity, by using the PTT/PET latent-crimp yarn as a core and using the matt polyester yarn as a sheath.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-elasticity full-stretch polyester composite yarn,

The present invention relates to a high stretch composite yarn using a core as a core and a full dull polyester as a sheath and a manufacturing method thereof, Stretchable polyester yarn having excellent stretchability, dullness and texture, and cost competitiveness by using mulching polyester yarn as a screening yarn, and a method for producing a fabric using the same.

Traditionally, stretch fabrics have been used mainly as stretchy materials with high activity, but recently they have become very popular as fashion materials, and they have been widely used in various applications such as suits, pants, and swimwear.

Conventionally, a method of manufacturing a stretchable fabric using a false-twist yarn has been disclosed in Korean Patent Publication No. 1992-25482, but this method has a problem in that the stretchability of the false-twist yarn is limited, thereby lowering the high stretchability of the fabric. In addition, as a method for producing a polyester yarn having stretchability, an example using a single yarn of a high viscosity / low viscosity polyester potential bar has been known. For example, Japanese Laid-Open Patent Publication No. 2000-160443 discloses a conjugated type conjugate fiber comprising a high viscosity polyester containing an ethylene terephthalate unit and a third component copolymerized therein and a low viscosity polyester consisting of only an ethylene terephthalate unit . The composite fibers were cooled and discharged at a predetermined drawing speed to improve the stretchability. However, since the composite fibers were produced only by the high-viscosity and low-viscosity polyester pottery, there was a problem in that the cost was high, Have.

Another conventional invention is a method for enhancing elasticity and extensibility by inherent crimp property of a crimped filament yarn using examination and warp yarn. However, in the above conventional methods, It has been pointed out that it is difficult to increase the interlocking strength of the fibers, and thus it is difficult to produce a composite workpiece.

Conventional polyester composite yarns are produced by partially entangling a partially oriented yarn (POY) and a flat yarn (FY) with each other to produce a spun composite construction due to heat shrinkage difference between the two yarns The method of manufacturing is widely used. Also, for the unique surface effect of the polyester composite yarn, a method of producing a composite yarn by using polyester fiber produced by containing a large amount of inorganic particles in a sheath, or by using acetate, rayon, .

However, the polyester composite yarn produced by the above method is excellent in bulky property and touch property because the fiber having a low shrinkage ratio is exposed to the outside as the shrinkable filament yarn, but it is difficult to impart a separate function, and sufficient stretchability Lt; / RTI >

The present inventors have made efforts to solve the problems of the prior art. As a result, the present inventors have examined the potential housing of polytrimethylene terephthalate (PTT) and polyethylene terephthalate (PET) The present invention has been accomplished by preparing a fabric and a knitted fabric by using the same, and confirming mechanical properties from the product.

Korean Patent Publication No. 10-2011-0077532

The present invention is based on the examination of PTT / PET potential housing considering the expansion and contraction function and mechanical properties, and the matte polyester is selected as the superfine in consideration of the functional characteristics and the texture and drape of the fabric, and the first heat treatment and the non- To a method for producing a matte and highly stretched polyester composite yarn by heat treatment.

In order to satisfy various functional characteristics at the same time while having high elasticity, various conditions of mechanical change were changed to enhance the migration of yarn. The present invention also relates to a method for producing fabrics and knitted fabrics using a high-stretch polyester composite yarn excellent in functionality and price competitiveness manufactured by such a method

In order to achieve the above object, the present invention provides a method of evaluating a PTT / PET pot housing having a mono denier of 0.7 to 3.5 denier and a total denier of 45 to 75 denier, wherein the mono denier is 0.05 to 4.0 denier, A high-stretch polyester composite yarn is produced through primary heat treatment and non-contact secondary heat treatment using 55 to 85 denier matt polyester yarn as superabsorbent.

The high-stretch polyester composite yarn comprises 20 to 80% by weight of PTT / PET pottery as an examination and 20 to 80% by weight of non-glossy polyester yarn as a superfine.

The high stretch polyester composite yarn is produced by air entanglement with a frequency of at least 40 to 80EA / M.

In addition, the present invention relates to a method for dyeing a fabric, which is produced by weaving a high-stretch polyester composite yarn using warp or weft yarns or fabricated by knitting, at a temperature of 100 to 130 DEG C for 2 to 5 hours, And then dyeing the polyester fabric.

The yarn for weaving or knitting according to the present invention can be produced by drawing a high stretch polyester conjugate yarn at 600 to 2000 TM.

As described above, the present invention provides a high-stretch polyester composite yarn having a core-sheath structure made of a matte polyester and a high stretch ratio polyester composite yarn, The fabric produced by weaving or knitting using warp or weft yarns has excellent effects of high stretchability, seam color, touch, appearance, softness and the like.

1 is a structural view of an apparatus for manufacturing a high stretch polyester composite yarn according to the present invention.
Fig. 2 is a view showing a manufacturing process of a high stretch polyester composite yarn according to the present invention.
3 is an enlarged photograph (b) of the apparatus (a), the second stretching roller 9 and the linear velocity control roller 10 of the high stretch polyester composite yarn manufacturing apparatus according to the present invention.

Hereinafter, the present invention will be described in detail.

The present invention relates to a PTT / PET pot housing having a mono denier of from 0.7 to 3.5 denier and a total denier of from 45 to 75 denier, and having a mono denier of 0.05 to 4.0 denier and a total denier of 55 to 85 denier, Stretch polyester composite yarn having a total denier of 100 to 130 denier manufactured by using ester yarn as a superabsorbent yarn.

PTT / PET potential barn (1) is produced by composite spinning PET and PTT having a specific melt viscosity difference, which is a polyester component, with a special spinning nozzle at a constant weight ratio. PTT is a Polytrimethyleneterephthalate fiber which shows the characteristics of polyester basically but shows elasticity which does not appear in PET (Polyetyleneterephthalate) due to its flexible molecular chain and is characterized by its own soft feel, . At this time, since the PTT fiber imparts bulkiness without being subjected to a twisting process, it is suitable for use in a side-by-side type or core-sheath type polyester based conjugate fiber including polyester.

Full Dull Polyester fiber has low light transmittance and is used as yarn for applications such as white bathing suit which should not be shaded, and exhibits so-called deep coloring which is dyed with deep color when dyed.

Matte polyester fibers are generally referred to as full-dull polyesters. When polymerizing a polyester, a proper amount of an inorganic material, for example, titanium dioxide (TiO ₂ ) to 2.0 wt% Is manufactured by spinning and drawing a chip to be used.

The high stretch polyester composite yarn of the present invention is produced by examining the PTT / PET potting yarn (1) using the matt polyester yarn (2) as a superabsorbent yarn, and the fabric and the knitted fabric Thereby imparting elasticity (Fig. 1).

More specifically, the high stretch polyester composite yarn of the present invention has a total denier (DENIER) of 45 to 75 denier and a thickness of mono-denier (0.7 to 3.5 denier) of the PTT / . If the thickness of the single yarn of the PTT / PET pot housing is less than 0.7 denier, the production is not easy. If the single yarn thickness exceeds 3.5 denier, the stretchability and drape property are lowered.

In addition, if the total denier of the PTT / PET potential housing (1) is less than 45 denier, the drape and stretchability are poor. If the denier exceeds 75 denier, the PTT / PET pottery housing The surface of the fabric tends to be tacky and unfavorable in appearance.

In the case of superabsorbent yarn 2, which is another component, it is composed of a matte polyester (2) yarn having a total denier of 55 to 85 deniers and a mono denier thickness of 0.05 to 4.0 deniers.

The thickness of the mono-denier is 0.05 to 4.0 denier. When the denier is less than 0.05 denier, the dyeing is not clear. When the denier is more than 4.0 denier, the surface texture of the fabric becomes poor.

In addition, when the total denier of the high-stretch polyester composite yarn is less than 100 denier, there is a problem that the PTT / PET pottery bulb protrudes on the surface of the high-stretch polyester composite yarn, If it exceeds 130 denier, the weight of the fabric becomes large, and the recovery rate of expansion and contraction is not good, which is not preferable for the application of woven fabrics and knitted fabrics.

The PTT / PET potting housing 1 used in the present invention is produced by using two kinds of polymers having different heat shrinkability, and preferably a PTT having an intrinsic viscosity of 0.9 to 1.2 and a PET having an intrinsic viscosity of 0.4 to 0.55. -Simultaneously radiating in side-by-side or sheath-core structure, heat is given in the spinning process and stretching process, causing heat shrinkage difference between the polymers, resulting in a physically coil- Which is a potential crimp source exhibiting stretchability.

In order to produce composite yarns by applying the PTT / PET pottery (1) as a screening of core-sheath type polyester composite yarns, The intensity of interlocking should be increased.

The conventional method can not increase the entanglement strength between the PTT / PET lathe 1 and the matte polyester 2. Therefore, in the present invention, the first stretching roller 7 performs the first heat treatment, the non-contact heat treatment A second heat treatment is performed in the heater 8 and the surface of the second stretching roller 9 is modified to give an over feed so that the high stretch polyester with air entangled at a frequency of 40 to 80 A / A composite yarn can be produced.

At this time, by modifying the surface of the second elongating roller 9 so as to give a 1 to 2% overfeed for controlling the linear velocity between the second elongating roller 9 and the air nozzle 11, (EA: number, M: METER), and the interlocking frequency and interlocking strength of the core wire can be controlled by using PTT / PET potential housing with high crimp characteristics.

If a part of the surface of the second elongating roller 9 (1/2 of the width of the roller) is cut using a cutting tool, the diameter of the cutting portion 10 of the second elongating roller 9 is reduced, The effect of overfeed is generated, and the tensile force of the core yarn passing through the air nozzle 11 is reduced to increase the air entanglement strength. The cutting portion whose diameter is reduced by cutting the surface of the second elongating roller 9 is defined as the linear speed control roller 10.

In the heat treatment condition, the first heat treatment is performed by the first stretching roller 7 and is performed at a temperature of 110 to 120 ° C instead of 85 to 100 ° C which is a normal heat treatment temperature, and the second heat treatment is performed to the non- The non-contact heat treatment is carried out at a temperature of 180 to 200 DEG C and a 1.0 to 2.0% overfeed is given by the linear speed control roller 10 of the roller so as to make air entanglement uniform. The air nozzle 11 for air entraining is applied with a pressure within a range of 2.2 to 3.0 kg / m ² .

Here, if air entanglement is performed at less than 40 EA / M, there is a problem in process passability, and in the case of exceeding 80 EA / M, there is a problem that a line-shaped INTERLACE defect occurs in a fabric and a knitted fabric.

Accordingly, in the present invention, a high stretch polyester composite yarn having high stretchability which can not be solved by the conventional method is manufactured by using the first heat treatment, the non-contact second heat treatment, and air entanglement, and the fabric and the knitted fabric can be manufactured using the same .

Hereinafter, the polyester knitted fabric and the method for producing the fabric using the high stretch polyester conjugate yarn will be described.

The present invention relates to a yarn for fabric production through a twisting process in which twist is applied to the high-stretch polyester composite yarn within a range of 600 to 2000 TM. The fabrics fabricated by weaving or twisting the twisted yarn as warp or weft are dyed at a temperature of 100 to 130 ° C for 2 to 5 hours in a high-temperature and high-pressure rapid dyeing machine. can do.

Hereinafter, the present invention will be described in detail with reference to examples. The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. Ranges are not limited to these examples.

≪ Example 1 >

The thickness of the mono denier was 1.9 denier, the total denier was 50 denier, the intrinsic viscosity was 1.10, and the PET potentiometer having an intrinsic viscosity of 0.52. The thickness of the mono denier was 2.9 denier, the total denier was 75 denier In which the first heat treatment temperature was 125 캜, the non-contact second heat treatment temperature was 185 캜, the over feed was 1.5%, and the air entangled nozzle was entangled with each air pressure of 2.3 kg / m ² to obtain 125 denier Of polyester fiber composite yarn.

The thus prepared yarn was knitted at 1400 Tm and used as warp and weft yarns to weave in a water jet loom in a plain weave, followed by salt processing according to normal processing conditions to produce a polyester fabric.

≪ Example 2 >

Stretched polyester composite yarn was produced in the same manner as in Example 1, and the polyester yarn thus prepared was fired at 1400 Tm to prepare a polyester knitted fabric.

≪ Example 3 >

The same procedure as in Example 1 was carried out except that the mono denier of the examination was 3.1 denier, the total denier was 60 denier, the mono denier of revolution was 2.1, and the total denier was 70 denier to manufacture a high stretchable polyester composite yarn To prepare a polyester fabric.

<Example 4>

Stretched polyester composite yarn was prepared in the same manner as in Example 3, and the thus prepared yarn was twisted at 1500TM to prepare a polyester knitted fabric.

&Lt; Comparative Example 1 &

The PTT / PET potential housing with the mono denier of 3.7 denier and the total denier of 75 denier was judged, the first heat treatment temperature was 100 ° C, the second contact heat treatment method was used, , A high stretch polyester conjugate yarn was produced in the same manner as in Example 1, and a polyester woven fabric was produced using the same.

&Lt; Comparative Example 2 &

Stretched polyester composite yarn was produced in the same manner as in Comparative Example 1, and the polyester yarn thus prepared was kneaded at 1400 Tm to prepare a polyester knitted fabric.

Examples 1 to 4 and Comparative Example 1 and Comparative Example 2 were subjected to the physical properties test by the following methods and are shown in Table 1.

(1) Elongation Recovery Rate of High Elastic Polyester Composite Yarns

The elongation recovery rate of the high stretch polyester composite yarn was measured ten times by ASTM 6720 measurement method.

(2) The elasticity of the fabric, the elongation recovery rate

The stretchability of the fabric was measured ten times by the measurement method of KSK 0352 5.2.2, and the elongation recovery rate of the fabric was measured ten times by the method of KSK 0541.

(3) Tactile feeling (refreshing feeling and softness)

"○" when more than 8 people judged to have a cooling sensation and softness by 10 experts, "△" when 6 ~ 7 persons judged that they have a cooling sensibility and softness, And "X" in the case of judging that there is a case.

 [Table 1] Experimental results

As shown in Table 1, the polyester fabrics produced in Examples 1 to 4 were excellent in all properties such as elongation recovery rate of the air entangled yarn, stretchability of the fabric, expansion / contraction recovery of the fabric / knitted fabric, On the other hand, the polyester fabrics produced in Comparative Examples 1 and 2 showed relatively low elastic recovery and tactile sensation.

1: core component
2: Second component
3: Yarn Guide
4: Yarn sensor
5: Yarn Cutter
6: Supply Nip roller
7: First elongating roller (GR1)
8: Non-contact heat treatment heater
9: Second elongating roller (GR2)
10: Line speed control roller
11: Air nozzle
12: High flexible composite yarn

Claims (7)

A preparation step of a matte polyester yarn having a single yarn thickness of 0.7 to 3.5 denier and an overall thickness of 45 to 75 denier as a result of examination, a PTT / PET latent housing having a warp yarn thickness of 0.05 to 4.0 denier and an overall thickness of 55 to 85 denier;
PTT / PET latent stage and first heat treatment stage of matte polyester;
A second non-contact heat treatment step of the first heat-treated fiber;
Air entraining of the non-contact secondary heat treated fiber;
Twisting of air entangled fibers; And
A step of winding the twisted fibers;
&Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; The method according to claim 1,
Wherein the weight ratio between the PTT / PET pottery bar stock and the super-fine matt polyester yarn is 20:80 to 80:20. The method according to claim 1,
The treatment temperature in the first heat treatment step is 110 to 120 ° C, the treatment temperature in the non-contact second heat treatment step is 180 to 200 ° C, the over feed rate in the air entraining step is 1 to 2% 2.2 to 3.0 kg / m &lt; ² &gt;, and the twist of the twisting step is in the range of 600 to 2000 T / M or less. The method according to claim 1,
And the frequency of said entanglement is 40 to 80 EA / M. 5. A high stretch polyester composite yarn produced by the method of any one of claims 1 to 4. A fabric fabric produced using the high stretch polyester conjugate yarn according to claim 5. A cyclic fabric produced by using the high stretch polyester conjugate yarn according to claim 5.

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