KR20010064273A - A process of preparing for the processed polyester yarn, and its fabric - Google Patents

Abstract

PURPOSE: A manufacturing method of a polyester conjugated textured yarn and a textile thereof are provided, which have excellent nobleness and excellent touch owing to the sheath-core type structure covering low elongation polyester multi-filament with high elongation polyester multi-filament, and excellent elastic property, no deterioration of physical property on doing alkali weight loss finishing and low cost when the textile is manufactured. CONSTITUTION: The conjugated yarn is obtained by a process containing the steps of: blending the high elongation polyester multi-filament and the low elongation polyester multi-filament having over 80% of difference in breaking elongation; twisting feebly in 3,000-15,000 of twisting coefficient(K), followed by drawing-setting; and then twisting in 20,000-50,000 of twisting coefficient(K) in the same direction as the twisting direction. Blending ratio of the high elongation polyester multi-filament and the low elongation polyester multi-filament is 0.5-2.5. The high elongation polyester multi-filament has 100-250% of breaking elongation. The low elongation polyester multi-filament has 20-40% of breaking elongation. The textile thereof is characterized by over 90% of elastic recovery percentage, at least 70% of elastic recovery percentage after 30seconds and at least 85% of elastic recovery percentage after 1hour.

Description

A process of preparing for the processed polyester yarn, and its fabric}

The present invention relates to a method for producing a polyester composite workpiece having excellent elasticity and feel and a fabric thereof.

Representative conventional techniques for imparting elasticity to a synthetic fiber fabric include a method of making a fabric from yarns covered with nylon elastic yarns or by using (weaving) a synthetic fiber yarn and a polyurethane elastic yarn together when weaving. There is this. Fabrics produced by the above method have a problem that the elasticity is improved but there is a lack of soft touch and adequate drape.

On the other hand, after weaving the fabric with a polyester yarn, the alkali loss treatment may give a soft touch and proper drape, but there is a problem of insufficient elasticity.

As a conventional technique for imparting excellent elasticity and touch to the fabric, a method of manufacturing a fabric using polyester twisted yarn and polyurethane elastic yarn together when weaving is known. Is vulnerable to mechanical problems of the fabric is lowered.

On the other hand, Japanese Patent Laid-Open No. 10-37029 proposes a method of manufacturing a stretch polyester fabric using lyocell fiber, which is a recycled fiber, with a polyester yarn, but there is a problem of high manufacturing cost.

The present invention solves the problems of the prior art described above, excellent in touch and elasticity, there is no mechanical properties such as tear strength when reducing alkali, and low cost of manufacturing polyester composite fabrication and its fabric to provide do.

1 shows a load-elongation curve of a polyester composite.

The present invention relates to a method for producing a polyester composite workpiece having excellent touch and elasticity and a fabric thereof. More specifically, the present invention blends two or more high-strength polyester multifilaments and low-strength polyester multifilaments having a difference in cutting elongation of 80% or more, and sets them after soft-weaving with a linkage number (K) of 3,000 to 15,000. The present invention relates to a method for producing a polyester composite fabrication, characterized by the combustible with the number of linkages (K) of 20,000 to 50,000 in the direction of the yarn.

In addition, the present invention is a polyester composite fabrication composed of two or more high-strength polyester multifilament and a low-strength polyester multifilament having a warp and / or weft difference of more than 80% difference in elongation, elongation modulus of 90% or more, It relates to a polyester fabric having an elongation recovery of 70% or more after 30 seconds and an elongation recovery of 85% or more after 1 hour.

Hereinafter, the present invention will be described in detail.

First, the present invention mixes the high elongation polyester multifilament and the low elongation polyester multifilament having a difference in cutting elongation of 80% or more in an air entanglement device to prepare a mixed fiber. At this time, the elongation of the high elongation polyester multifilament yarn is preferably 100 to 250%, and the elongation of the low elongation polyester multifilament yarn is preferably 20 to 40%. It is preferable to adjust these blend sum ratios in consideration of the elasticity and touch on a fabric. That is, it is preferable that the mixing ratio of high elongation polyester multifilament yarn / low elongation polyester multifilament yarn is 0.5-2.5. The cutting strength of the warp or weft yarn applied on the final processed paper is preferably in the range of 1 to 2.5 g / d. When the blending ratio exceeds 2.5, the touch is excellent on the final processed paper, but the strength of the applied processed yarn may be reduced, and the tear strength of the fabric may be lowered. have. On the contrary, when the blending ratio is less than 0.5, the tear strength of the final processed paper may be excellent, but the appearance of the effect yarn is weak compared to the screening, resulting in a poor touch.

The total denier of the polyester multifilament yarn used in the present invention is about 50 to 400, preferably 100 to 300 denier for the garment. However, the present invention does not particularly limit the total denier, single yarn fineness and cross-sectional shape of the polyester multifilament. The denier of the component single yarn is preferably 1 to 3 deniers for the high-strength polyester multifilament acting as the effect yarn, and 3 to 10 deniers for the low-strength polyester multifilament acting as the screening.

Next, the horn sum yarn is set after the soft twisting with the number of linkages (K) of 3,000 to 15,000. The linkage number K is calculated by the following formula (I).

Linkage (K) = T × (I)

Where T is the number of twists imposed on one yarn and D is the total fineness (denier) of the yarn.

It is more preferable to set the linkage number (K) at 4,500 to 13,000 at low continuous shooting. If the number of joints (K) is less than 3,000 during weak spinning, the stretch recovery characteristics of the fabric become poor, and if it exceeds 15,000, excessive twisting may be given during processing, resulting in a large amount of trimming or moor. This results in poor machining productivity and various process permeability. In addition, due to uneven distribution of excessive twisting, uneven salt spots may be generated on the fabric surface.

Subsequently, the pre-twisted yarn is combusted in the same direction as the twist direction with the combustor to manufacture the polyester composite processing of the present invention. At this time, as a combustor, pin type, ceramic disc type, and belt type can be used. Combustion conditions may vary somewhat depending on the number of linkages (K) during the pre-twisting process, but when using a pin type combustor, for example, the processing speed 50 ~ 150m / min, linkage (K) 20,000 ~ 50,000, heater temperature It is preferable to process on the conditions of 150-220 degreeC and the tension about 0.05-0.5g / d. In the false twisting step, the weak twisted yarn obtained in the pre-twisting step has a twisting torque, so it is preferable to perform the set of the rolled paper or to perform the heat set on the hot plate.

The polyester composite fabricated by the above method has a two-layered deep sheath structure in which a high-strength polyester multifilament surrounds a low-strength polyester multifilament, so that the fabric has excellent sublimation, feel, and elasticity. Expression.

On the other hand, the present invention uses a polyester composite fabricated by the above method as a warp and / or weft yarn, that is to say used for both warp and weft yarn, used only in any of the warp or weft yarn, or general poly warp and weft yarn Characterized in that the fabric is used in combination with ester multifilament.

When weaving, the warp density / weft density ratio should be 1.2 to 3.0. When the density ratio is less than 1.2, the stretching property intended by the present invention is difficult to be obtained, which is not preferable. In addition, when the density ratio exceeds 3.0, the weft density is too small compared to the inclined density, which is not preferable because problems such as slip (Silp) occur.

As a weaving method, it is possible to weave a fabric of a desired structure by using a conventional loom, for example, a weaving machine, a water jet room, an air jet room, a repier, or the like. Tissues, Twill, Satin, Amunzen, Crepe, etc. all exhibit excellent elasticity.

After weaving the fabric, alkali treatment is carried out with alkali solution to improve the feel and drape. Since the fabric of the present invention is composed of 100% polyester yarn, there is no embrittlement phenomenon of the yarn due to the alkali weight loss, which results in better elasticity and feel.

Dyeing may be carried out with a disperse dye or the like under a high temperature and high pressure dyeing conditions of 100 ~ 130 ℃ like conventional polyester fabrics. It is desirable to improve the elasticity of the product, not to impart excessive tension during pre-refining and final set after dyeing.

The fabric of the present invention is excellent in touch and elasticity. Specifically, the elastic modulus of elasticity is 90% or more, the elongation recovery after 30 seconds is 70% or more, and the elongation recovery after 1 hour is 85% or more.

In the present invention, the elongation modulus, elongation recovery and sublime are measured by the following method.

Elongation Modulus

The elongation modulus by the ravel strip method is measured by JIS L 1096 method.

① Using a universal tensile tester, 200mm of specimen length under ultra load (0.2g / d) is stretched to 5% of specimen length at a tensile speed of 200mm / min.

② Leave for 1 minute under load condition after 5% tension.

③ Remove the load at the same speed ratio and leave for 3 minutes.

④ Tighten again at the same speed ratio as in ①.

⑤ Measure the residual elongation from the load-elongation curve in FIG.

⑥ Calculate elongation modulus (%) with the following formula.

⑦ Measure the average value of 5 times.

Elongation at modulus (%) = × 100

Where L is the sample length at 5% elongation and L1 is the residual elongation.

Recovery rate

Elongation recovery rate by the grabbing method is measured by JIS L 1096 method.

① Using the universal tensile tester, fix the specimen to the upper gram and fix the specimen to the lower clamp by applying super load.

② Mark the baseline at intervals of 200 mm.

③ Leave 1.5 hours at a load of 1.5kgf and measure the distance between the baselines.

④ Remove the load and leave for 30 seconds and 1 hour, and measure the distance between the baselines.

⑤ Elongation recovery rate is calculated by the following equation.

⑥ Set the average value of 5 times as the measured value.

Elongation recovery (%) = × 100

Where L0 is the length of the specimen (200mm) at the time of ultra loading, L1 is the length of the baseline after 1 hour of standing after 1.5kgf loading, and L2 is the length of the baseline 30 seconds and 1 hour after unloading.

Sublime degree (㎠ / g)

The sublime degree is measured by JIS L 1018 method.

Sublime = × 100

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

A 120 denier processed yarn is prepared by interweaving 120 denier 72 filament of highly oriented unstretched polyester multifilament 120 filament with 140% cutting elongation and 120 filament yarn of general polyester multifilament with 33% cutting elongation by air entanglement. . The produced twisted yarn is given a weak lead at 510T / M (coefficient of K (= 7900)) in the Z-axis direction, and the obtained weak twisted yarn is subjected to a paper-set. The post-twisted twisted yarn is subjected to post-twisting by giving 2,800T / M (link coefficient (K) = 43,000) in the Z-direction. The pre-twisted twisted twisted yarn is applied to all the weft yarns and weaved into a density and change twill structure of 96 warp yarns / inch and 65 weft yarns / inch. The fabric produced is subjected to salt processing by conventional salt processing methods such as refining, preliminary set, alkali loss, dyeing and final set. The number of slopes of the final processed paper was 130 / inch, and the number of wefts was 85 / inch, and the reduction rate was about 25%. The final processed paper exhibited the soft touch inherent to the composite twisted yarn, and the elastic modulus of elasticity was 100% by the ravel strip method, 78% elongation recovery after 30 seconds, and 90.2% elongation recovery after 1 hour. The sublime was 3.18cm 2 / g and showed excellent bulkiness. The cut strength of the warp or weft applied on the final paper was 1.31 g / d.

Example 2

A 120 denier processed yarn is prepared by interweaving 120 denier 72 filament of highly oriented unstretched polyester multifilament 120 filament with 140% cutting elongation and 120 filament yarn of general polyester multifilament with 33% cutting elongation by air entanglement. . The fabricated yarn is imparted with weak lead at 700T / M (link coefficient (K) = 10,844] in the Z-axis direction, and the resulting weak twisted yarn is subjected to a paper-set. The post-twisted twisted yarn is subjected to post-twisting by giving 2,800T / M (link coefficient (K) = 43,000) in the Z-direction. The pre-twisted twisted twisted yarn is applied to all the weft yarns and weaved into a density and change crepe of 74 warp yarns / inch and 50 weft yarns / inch. The fabric produced is subjected to salt processing by conventional salt processing methods such as refining, preliminary set, alkali loss, dyeing and final set. The number of slopes of the final processed paper was 98 / inch, and the number of weft yarns was 72 / inch, and the reduction rate was about 26%. The final processed paper exhibited a soft touch inherent to the composite twisted yarn, and 100% elongation modulus by the Ravel Strip method, 81% elongation recovery after 30 seconds, and 91.5% elongation recovery after 1 hour were obtained, respectively. The sublime was 3.32 cm 2 / g and showed excellent bulkiness. The cut strength of the warp or weft applied on the final paper was 1.60 g / d.

Comparative Example 1

Pre-twisted yarn Z 710T / M [Kn = 10,040], Post-Combusted Z 2850T / M [Kn = Kn = 40,300] using ordinary polyester multifilament 200denier 72filament yarn with 35% elongation at break Pre-twisted post-twisting was performed under the condition of. The obtained pre-twisted twisted yarn was applied to all the light and weft yarns, and weaved with a density crepe structure of 76 yarns / inch of warp yarn and 52 yarns / inch of weft yarn and subjected to salt processing in the same manner as in Example 1. Paper was prepared (reduction rate 25%). The number of slopes of the final processed paper was 105 / inch and 76 wefts / inch. The final processing paper had excellent elasticity, but had a disadvantage of poor touch. Sublimation was 1.8 cm 2 / g. The breaking strength of the applied warp yarn on the final processed paper was 2.63 g / d.

Comparative Example 2

The general polyester high elasticity twisted yarn 300 denier 96 filament yarn with 27% elongation at break was applied as the weft of the fabric, and the polyester multifilament 240 denier 96 filament was applied to the warp yarn to weave the change crepe structure. The number of warp yarns was 100 / inch and the number of weft yarns was 50 / inch, and the final processing paper was prepared by performing salt processing in the same manner as in Example 1. The number of slopes of the final processed paper was 140 / inch, the weft yarn was 62 / inch, and the reduction rate was 24%. The upward elastic modulus of the finished paper was 85%, the elongation recovery after 30 seconds was 65.1%, and the recovery rate after 1 hour was 71.3%. The sublime level was 2.8cm2 / g, which was relatively good due to the biaxial shrinkage effect. The cut strength of the applied warp yarn on the final processed paper was 2.8 g / d.

The polyester composite processing of the present invention has a two-layered deep sheath structure in which a high-strength polyester multifilament encloses a low-strength polyester multifilament, and thus has excellent sublime feeling and feel. In addition, the polyester composite processing of the present invention is excellent in elasticity when manufacturing the fabric, there is no reduction in physical properties such as tear strength during alkali weight loss processing, and the manufacturing cost is low.

Claims (5)

Mix two or more high-strength polyester multifilaments and low-strength polyester multifilaments with a difference in cutting effi- ciency of 80% or more, and set them after weak yarns with a linkage number (K) of 3,000 to 15,000. A method for producing a polyester composite fabrication, characterized by flammability with a linkage of 20,000 to 50,000. The method according to claim 1, wherein the blending ratio of the high elongation polyester multifilament / low elongation polyester multifilament is 0.5 to 2.5. The method according to claim 1, wherein the cutting elongation of the high elongation polyester multifilament is 100 to 250% and the cutting elongation of the low elongation polyester multifilament is 20 to 40%. Polyester composite fabrication consisting of two or more high-strength polyester multifilaments and low-strength polyester multifilaments with a warp and / or weft difference of more than 80% in elongation at break, having an elongation at least 90%, and elongation recovery after 30 seconds More than 70% and 85% elongation after 1 hour. The polyester fabric of claim 4 wherein the warp density (bone / inch) / weft density (bone / inch) ratio is between 1.2 and 3.0.