KR100548644B1 - Elastic conjugated fiber which has improved warping property wounded on a beam - Google Patents

Abstract

The present invention relates to a stretchable composite fiber wound on a beam having improved diameter, and more particularly, (A) spinning / winding two different polymers to prepare partially oriented composite yarn; And (B) 100 to 8,000 partially oriented composite yarns obtained in the above step (A) using a special stretching / cancer composite device having two cold rollers, three hot rollers and one hot plate at the same time. The present invention relates to an elastic composite fiber wound on a beam having improved diameter including imparting a crimp in the form and winding the beam in a diameter of 300 to 2500 mm and a width of 200 to 2,000 mm.

Elastic composite fiber, crimp extension rate, elastic recovery rate, rigidity

Description

Elastic conjugated fiber which has improved warping property wounded on a beam}

1 is a schematic diagram of a stretchable composite fiber in the form of a beam produced by the present invention.

2 is a schematic view of a stretch / scene composite device used in the present invention.

<Description of the symbols for the main parts of the drawings>

1: yarn creel 2: yarn guide

3: first cold roller (1CR) 4: second hot roller (2HR)

5: 3rd hot roller (3HR) 6: hotplate (HP)

7: 4th hot roller (4HR) 8: 5th cold roller (5CR)

9, 10: crosstalk detector 11, 14: tensioner (dancer)

12: entanglement air nozzle

13: Canon body with flaw detector

15: Lubrication Guide 16: Canon Body

17: yarn beam 18: winding motor

The present invention relates to a stretchable composite fiber wound on a beam having improved diameter, and more particularly, (A) spinning / winding two different polymers to prepare partially oriented composite yarn; And (B) 100 to 8,000 partially oriented composite yarns obtained in the above step (A) using a special stretching / cancer composite device having two cold rollers, three hot rollers and one hot plate at the same time. The present invention relates to a stretchable composite fiber wound on a beam having improved diameter including imparting crimp in the form and winding the beam in a diameter of 300 to 2500 mm and a width of 200 to 2,000 mm.

Conventionally, a method of blending polyurethane-based fibers to give elasticity has been widely used. However, polyurethane-based fibers have excellent elasticity but weak chlorine resistance and are not dyed in general polyester dyes. When mixed with system fibers, the dyeing process is not only complicated, but is also disadvantageous in terms of color fastness.

Therefore, in recent years, as a method for producing elastic fibers using two kinds of polymers having different structures, two kinds of polyethylene terephthalates (PET) having extreme viscosity differences are used (Japanese Patent Laid-Open No. 10-72732). Japanese Patent Application Laid-Open No. 9-209217), or a method for producing a polyester-based latent crimpable expressive fiber using a general polyethylene terephthalate and a highly shrinkable copolymerized polyethylene terephthalate (Japanese Patent Laid-Open No. 3-161519, Japanese Patent Laid-Open 2000-328378, Japanese Patent Laid-Open No. 9-41234), and the like, and in addition, a method using polytrimethylene terephthalate (PTT) or polybutylene terephthalate (PBT) having some stretch properties has also been proposed (US). 3,671,379, Japanese Patent Laid-Open No. 2000-248430.

In the case of high-stretch, high-stretch fibers using the two kinds of polymers, there is a disadvantage in that the occurrence of mowing and trimming occurs when warping using a conventional warp device due to the crimp characteristics of the fiber itself.

The inventors of the present invention, while researching to produce a stretchable composite fiber in the form of a wound around the beam with excellent diameter, elasticity, dyeing and post-processing properties, and spun / wound two different polymers to form a partially oriented composite yarn 100 to 8,000 partially oriented composite yarns were prepared and obtained using a specially drawn / coated composite device equipped with two cold rollers, three hot rollers and one hot plate at the same time, to impart a crimp in the form of a spring. When manufacturing a stretchable composite fiber by winding on the fiber, it is possible to produce a stretchable composite fiber wound on a beam having improved elasticity (critical elongation rate and elastic recovery rate), which is a disadvantage of the conventional stretchable composite fiber, and having improved diameter. It confirmed and came to this invention.

That is, an object of the present invention is to prepare a partially oriented composite yarn using two kinds of polymers having different structures, and then to use 100 to 8,000 compositely oriented composite yarns at the same time using a specially stretched / canon composite device. By providing a crimp in the form of a spring and winding the beam, it is possible to provide a stretchable composite fiber and a knitted fabric using the composite fiber, as well as excellent in diameter, as well as elasticity, dyeing and post-processability.

Stretched composite fiber of the form wound on the beam of the present invention is characterized in that it is produced by the following steps:

(A) spinning / winding two different polymers to produce partially oriented composite yarn; And

(B) 100 to 8,000 partially oriented composite yarns obtained in the above step (A) using a special stretched / canon composite device having two cold rollers, three hot rollers and one hot plate at the same time, spring form Giving a crimp of, winding in a beam of 300 to 2500 mm in diameter, 200 to 2,000 mm in width.

Hereinafter, the method for preparing the stretchable composite fiber of the present invention will be described in more detail by dividing step by step.

Step (A):

Two different polymers (polyethylene terephthalate (PET), copolymerized polyethylene terephthalate (CoPET), polytrimethylene terephthalate (PTT), nylon 6 (Nylon 6), polybutylene terephthalate (PBT), etc.) It melts and spins through a special spinneret to obtain a side-by-side composite fibrous polymer. In this case, the composite ratio of the individual polymers is suitably 7: 3 to 3: 7, more preferably 4: 6 to 6: 4.

The polyethylene terephthalate polymer used in the present invention is prepared from terephthalic acid and ethylene glycol, and the copolymerized polyethylene terephthalate polymer is substituted with isophthalic acid in the range of 15 mol% or less. Polytrimethylene terephthalate polymers are prepared by polycondensation of terephthalic acid with 1,3 propanediol. Nylon 6 polymer is prepared by ring-opening polymerization of ε-caprolactam, and polybutylene terephthalate is prepared by polycondensation of terephthalic acid and butylene glycol.

At least one of the two different polymers is preferably polyethylene terephthalate or polytrimethylene terephthalate.

The melting temperature of the polymer is preferably about 250 to 300 ° C., and the spinning temperature through the discharge hole may be about 250 to 300 ° C., but considering the spinning processability and the thermal decomposition problem, the temperature is preferably in the range of 260 to 290 ° C. .

The obtained composite yarn is spun / wound to obtain a partially oriented yarn (POY).

When spinning, cold wind temperature 20 ℃, cold wind speed is 0.4 ~ 0.5m / sec is suitable, the speed of the first and second gode controller is 1,500 ~ 3,200m / minute, the temperature does not require separate heating Do it at room temperature.

Step (B):

The partially oriented composite yarn obtained by spinning / winding in step (A) was simultaneously stretched / polished in 100 to 8,000 partially oriented composite yarns (POY) by using the specially stretched / political composite device shown in FIG. The elastic composite fiber provided with the crimp of spring shape is obtained. Preferably the draw ratio at the time of stretching / canon is preferably from 1.3 to 4.0, the stretching / canon speed is usually carried out at a level of 500 ~ 900m / min. As shown in FIG. 2, 100 to 8,000 partially oriented composite yarns are unwound in a krill and can be stretched while passing through the first cold roller 1CR, the second hot roller 2HR, and the third hot roller 3HR. Glass transition temperature (T _g ) or more), and is stretched between the third hot roller (3HR) and the fourth hot roller (4HR) while being heat-set in the hot plate (HP), the fifth cold roller (5CR) It is wound up by a beam of 300 to 2500 mm in diameter and 200 to 2,000 mm in width. At this time, in the case of a hot plate, both contact type and non-contact type can be used. The temperature of each hot roller is 80 ~ 100 ℃, and the temperature of hot plate is about 120 ~ 180 ℃, and 100 ~ 8,000 mirrored beams are provided with spring-shaped crimp on the fiber through drawing and heat setting steps. Elastic composite fibers in the form can be obtained. Between the fifth cold roller 5CR and the beam, there can be provided a tension adjusting device, a canon for body, a mortise and trimmer detector, an anti-mortar detector, an air nozzle for entanglement, an oil supply guide for oiling, and the like.

The stretchable conjugated fiber produced by the present invention preferably has a number of defects (mouse, trimming) of 10 or less at 100,000m diameter. If the number of defects exceeds 10, the quality of the fabric is degraded, which is not preferable.

The stretchable composite fiber produced by the present invention preferably has a diameter of crimp of 200 µm or less after dry heat treatment at 150 ° C. for 30 minutes. If the diameter of the crimp exceeds 200 μm, it is not preferable because it is inelastic in manufacturing the fabric.

The stretchable composite fiber produced by the present invention preferably has a crimp elongation of 40% or more and an elastic recovery rate of 60% or more.

From here,

Crimping rate (%) = [(L2-L1) / L2] × 100 ---------------------- (1)

Elastic recovery rate (%) = [(L2-L3) / (L2-L1)] × 100 -------------------- (2)

(In the above formula, L1 is treated with fiber skein at 150 ° C. under dry load for 30 minutes, dried at room temperature atmosphere, loaded with 0.1 gf / d for 2 minutes, and then left for 10 minutes, 2 mgf / d). L2 is the length measured after 2 min of load applied, and the length of L2 is measured after 2 minutes after adding 0.1 gf / d load. L3 is the length measured 2 minutes after removing 0.1 gf / d load. to be.)

If the crimp elongation exceeds 40%, or the elastic recovery rate exceeds 60%, it is not preferable because the elasticity is lowered when manufacturing the fabric.

The stretchable conjugated fiber produced by the present invention preferably has a final single yarn fineness of 1 to 4 deniers, more preferably 2 to 3 deniers. If the final single yarn fineness is less than 1 denier, the manufacturing process becomes difficult, and if it exceeds 4 denier, uniform cooling is difficult, which is not preferable.

The stretchable composite fiber can be prepared into a woven fabric according to a conventional method.

Hereinafter, the configuration and effects of the present invention will be described in more detail with reference to specific examples and comparative examples, but these examples are only intended to clarify the present invention, but are not intended to limit the scope of the present invention.

In Examples and Embodiments, the physical properties of the stretchable composite fiber were measured by the following evaluation criteria and measuring methods.

(1) Number of yarn defects (dogs 100,000 m)

-The number of defects (eg, trim, moor, etc.) of yarn generated during 100,000m canon using the special drawing / canon composite device shown in FIG.

(2) Measurement of crimp elongation (%) and elastic recovery rate (%):

The fiber skein is treated for 30 minutes in unloaded dry heat at 150 ° C. for 30 minutes in a room temperature atmosphere, subjected to a load of 0.1 gf / d for 2 minutes, and then left for 10 minutes. The sample was left for 2 minutes under a load of 2 mgf / d, and then its length (L1) was measured, and the length (L2) was measured after 2 minutes with a load of 0.1 gf / d. Furthermore, after removing the load of 0.1 gf / d, the length L3 is measured after 2 minutes.

 Crimp rate (%) = [(L2-L1) / L2] × 100

 % Elastic recovery (%) = [(L2-L3) / (L2-L1)] × 100

(3) Crimp diameter: After 30 minutes treatment at 150 ℃ under no load dry heat, randomly select 10 crimps without any force applied to the yarn and measure the diameter by optical microscope, and the average value Was the crimp diameter.

(4) Knitted fabric elongation (%): Measured according to JIS L 1096 B method (static load method).

(5) Elongation recovery rate (%): Measured according to JIS L 1096 B-1 method (static load method).

(Example 1)

In the preparation of the stretchable composite fiber, the copolymerized polyethylene terephthalate substituted with polyethylene terephthalate and 10 mol% isophthalic acid as shown in Table 1 under the conditions of spinning temperature 285 ℃, cold wind temperature 20 ℃, cold wind speed 0.45m / second, In the spinning / winding equipment equipped with spinneret, the spinning speed was set to 3,000m / min to produce a partially oriented composite yarn (POY) such that the single yarn fineness was 3.4 denier. 900 yarns of partially oriented composite yarn obtained by spinning / winding were stretched / reinforced using a specially stretched / sized composite device shown in FIG. It was. At the time of stretching, the stretching ratio is 1.66, stretching / radial speed 760m / min, the temperature of the second hot roller 70 ℃, the temperature of the third hot roller 95 ℃, the temperature of the fourth hot roller 40 ℃ and the temperature of the hot plate 135 ℃ The first and fifth cold rollers were not heated separately. An air nozzle was attached between the fifth cold roller and the winding beam to impart entanglement by using an air pressure of 1.3 KP, and 0.90% by weight of the emulsion yarn having a concentration of 15% was supplied through a lubrication guide. At the front and the back, a special tension controller was installed to stretch / remark while maintaining a constant tension (0.1gf / d). In addition, when defects (morrow, trimming) occur, it is possible to check through the defect detector installed in the body of the scene. The conditions and results are shown in Table 1.

The obtained composite fiber was very good in diameter and showed very good stretch property when applied to a knitted fabric.

(Example 2)

In producing the stretchable composite fiber, as shown in Table 1, using polyethylene terephthalate and polytrimethylene terephthalate, spinning was carried out in the same manner as in Example 1 except that the spinning temperature is set to 280 ℃, spinning speed 2,600m Partially oriented composite yarn (POY) was prepared. In addition, except that 1,200 partially oriented composite yarns obtained by spinning / winding were used, and the draw ratio was set to 1.60. Composite fibers were prepared. The conditions and results are shown in Table 1.

The obtained composite fiber was very good in diameter and showed very good stretch property when applied to a knitted fabric.

(Example 3)

In preparing the stretchable composite fiber, it was spun in the same manner as in Example 1 except that the polyethylene terephthalate and polybutylene terephthalate were used as shown in Table 1, and the spinning temperature was set to 280 ° C. and the spinning speed was 2,600 m. A partially oriented composite yarn (POY) was prepared. In addition, except that 900 yarns of the partially oriented composite yarn obtained by spinning / winding were used, and the draw ratio was set to 1.60. Composite fibers were prepared. The conditions and results are shown in Table 1.

The obtained composite fiber was very good in diameter and showed very good stretch property when applied to a knitted fabric.

(Example 4)

In the production of the stretchable composite fiber, using a polytrimethylene terephthalate and nylon 6 as shown in Table 1, except that the spinning temperature is set to 270 ℃, spinning speed 2,600m, the same as in Example 1 Oriented composite yarn (POY) was prepared. In addition, except that 1,200 partially oriented composite yarns obtained by spinning / winding were used, and the draw ratio was set to 1.60. Composite fibers were prepared. The conditions and results are shown in Table 1.

The obtained composite fiber was very good in diameter and showed very good stretch property when applied to a knitted fabric.

(Comparative Example 1)

In preparing the elastic fiber, as shown in Table 1, using a copolymerized polyethylene terephthalate substituted with polyethylene terephthalate and 10 mol% of isophthalic acid to spin as in Example 1 to prepare a partially oriented composite yarn (POY). . The partially oriented composite yarn obtained by spinning / winding was stretched using a conventional stretching apparatus to prepare a single yarn fineness 2.1 composite fiber having a spring shape crimp. At the time of stretching, the stretching ratio is 1.65, the stretching speed is 760m / min, the temperature of the hot roller is 80 ℃, the temperature of the hot plate is 135 ℃, and an air nozzle is attached between the cold roller and the wound fiber skein using 1.3KP air pressure to impart entanglement. It was. 900 pieces of stretched partially oriented composite yarns obtained by the stretching were prepared using a normal warp machine. The conditions and results are shown in Table 1.

The resultant composite fiber had a slight decrease in stretch characteristics and very poor rigidity in yarns and woven fabrics.

(Comparative Example 2)

In preparing the stretchable composite fiber, it was spun in the same manner as in Example 1 except that polyethylene terephthalate and polytrimethylene terephthalate were used as shown in Table 1, and the spinning temperature was set to 280 ° C. and the spinning speed was 2,600 m. A partially oriented composite yarn (POY) was prepared. The partially oriented composite yarn obtained by spinning / winding was stretched and diameterd in the same manner as in Comparative Example 1 to prepare an elastic composite fiber. The conditions and results are shown in Table 1.

The resultant composite fiber had a slight decrease in stretch characteristics and very poor rigidity in yarns and woven fabrics.

(Comparative Example 3)

In the preparation of the stretchable composite fiber, the partial orientation by spinning in the same manner as in Example 1, except that polytrimethylene terephthalate and nylon 6 as shown in Table 1, and set the spinning temperature 270 ℃, spinning speed 2,600m Composite yarn (POY) was prepared. The partially oriented composite yarn obtained by spinning / winding was stretched and diameterd in the same manner as in Comparative Example 1 to prepare an elastic composite fiber. The conditions and results are shown in Table 1.

The resultant composite fibers showed a slight decrease in stretch characteristics and very low stiffness in yarns and woven fabrics.

division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Polymer Kinds PET, CoPET PET, PTT PET, PBT PTT, NY6 PET, CoPET PET, PTT PTT, NY6 Compound ratio 5: 5 5: 5 5: 5 5: 5 5: 5 5: 5 5: 5 radiation Spinning temperature (℃) 285 280 280 270 285 280 270 Spinning speed (m / min) 3,000 2,600 2,600 2,600 3,000 2,600 2,600 Drawing / canon Drawing / scene head 900 1,200 900 1,200 900 900 900 DR 1.66 1.60 1.60 1.60 1.65 1.65 1.65 1CR temperature (℃) Room temperature Room temperature Room temperature Room temperature none none none 2HR temperature (℃) 80 80 80 80 80 80 80 3HR temperature (℃) 95 95 95 95 none none none HP temperature (℃) 135 135 135 135 135 135 135 4HR temperature (℃) 40 40 40 40 none none none 5CR temperature (℃) Room temperature Room temperature Room temperature Room temperature Room temperature Room temperature Room temperature Elongation / surface speed (m / min) 760 760 760 760 760 760 760 Number of defects 5 6 6 7 26 34 37 Yarn Crimping rate (%) 44 52 48 50 38 40 39 Elastic recovery rate (%) 73 71 70 70 67 68 68 Crimp Diameter (㎛) 150 100 180 120 250 200 200 textile Elongation (%) 28 33 30 31 24 27 26 Recovery rate (%) 90 92 91 91 88 89 89

※ Examples 1 to 4 are one-step stretching by using the special drawing / scene compounding machine (CR (Cold Roller): 2, HR (Hot Roller): 3, HP (Hot Plate): 1) of the present invention. /canon.

※ Comparative Examples 1-3 are 2-step extending | stretching / canon using a normal drawing machine (HR: 1, HP: 1) and a warping machine.

According to the present invention, it has excellent diameter (defect number: 10 times or less, 100,000m) and stretching property (more than 40% of crimp elongation, more than 60% of elastic recovery), It can be produced, and when applied to a knitted fabric, it is possible to obtain a stretchable composite fiber in a form wound on a beam having excellent stretchability.

Claims (8)

Stretch composite fiber wound on a beam, characterized in that manufactured by the following steps: (A) spinning / winding two different polymers to produce partially oriented composite yarn; And (B) 100 to 8,000 partially oriented composite yarns obtained in the above step (A) using a special stretched / canon composite device having two cold rollers, three hot rollers and one hot plate at the same time, spring form Giving a crimp of, winding in a beam of 300 to 2500 mm in diameter, 200 to 2,000 mm in width. The flexible composite fiber of claim 1, wherein the two different polymers are selected from polyethylene terephthalate, copolymerized polyethylene terephthalate, polytrimethylene terephthalate, nylon 6, or polybutylene terephthalate. The stretchable composite fiber according to claim 1, wherein at least one of the two different polymers is polyethylene terephthalate or polytrimethylene terephthalate. The stretchable composite fiber wound in a beam according to claim 1, wherein the stretchable composite fiber has a number of defects (mouse, trimming) of 10 or less at 100,000m diameter. The stretchable composite fiber wound in a beam according to claim 1, wherein the stretchable composite fiber is dry heat treated at 150 ° C. for 30 minutes and has a diameter of 200 µm or less. According to claim 1, wherein the elastic composite fiber has a crimp elongation of 40% or more obtained from the following formula (1), the elastic recovery fiber obtained from the following formula (2) is 60% or more of the elastic composite fiber wound on the beam : Crimping rate (%) = [(L2-L1) / L2] × 100 ---------------------- (1) Elastic recovery rate (%) = [(L2-L3) / (L2-L1)] × 100 -------------------- (2) (In the above formula, L1 is treated with fiber skein at 150 ° C. under dry load for 30 minutes, dried at room temperature atmosphere, loaded with 0.1 gf / d for 2 minutes, and then left for 10 minutes, 2 mgf / d). L2 is the length measured after 2 min of load applied, and the length of L2 is measured after 2 minutes after adding 0.1 gf / d load. L3 is the length measured 2 minutes after removing 0.1 gf / d load. to be.) The stretchable composite fiber according to claim 1, wherein the stretchable composite fiber has a final single yarn fineness of 1 to 4 deniers. Knitted fabric comprising an elastic composite fiber prepared according to any one of claims 1 to 7.

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