KR20170099140A

KR20170099140A - Spinneret for hollow fiber having an excellent warming property and manufacturing method of hollow fiber by using the same

Info

Publication number: KR20170099140A
Application number: KR1020160021138A
Authority: KR
Inventors: 김대희; 김민철; 류정우
Original assignee: 도레이첨단소재 주식회사
Priority date: 2016-02-23
Filing date: 2016-02-23
Publication date: 2017-08-31
Also published as: KR101882071B1

Abstract

The present invention relates to a method for manufacturing a yarn for warm clothing. According to the method for manufacturing a yarn for warm clothing of the present invention, a polyester polymer having an intrinsic viscosity [] of 0.640 to 0.670 is discharged from a discharge port located on a concentric circle having the center of a spinneret as the origin while maintaining a constant distance between yarns, and is cooled by a cooling device. The cooling device is attached at 30 to 50 mm directly below the spinneret to cool the polymer. Each filament wraps around the cooling device, moves to the bottom, and is spun. According to the method for manufacturing a yarn for warm clothing of the present invention as described above, it is possible to produce the yarn through conventional equipment without modification of the conventional spinning equipment, and since the method is excellent in operability, the unit cost does not need to increase. In addition, the method provides excellent cooling efficiency for a single yarn without making process complex, and a hollow fiber having a low fineness, no deviation in fineness, no variation in dyeing, and a much higher hollowness than that of conventional hollow fiber at a low price.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hollow fiber spinning,

More particularly, the present invention relates to a spinneret having an alphabet letter M-shaped cross section and a method for manufacturing the same, and more particularly, to a spinneret for hollow yarn having excellent warmth and flammability, Since the M-shaped cross section of the present invention has excellent hollowness and excellent warmth, the damage and shape deformation of the cross section after the twisting process is less than that of the conventional hollow yarn, so that the uniformity of tactility and dyeability is excellent, Can be used.

Generally, hollow yarn is excellent in light weight and warmth due to hollowness including air in the center of yarn, and has been used for sportswear requiring a light feeling by using it and for winter warm clothing and bedclothes for which warmth is required, The application range is gradually expanding.

For example, Korean Patent Laid-Open Publication No. 2001-0000008, entitled " Polypropylene Hollow Fiber and Method for Producing the Same, " discloses a process for producing an alkali-soluble copolyester And a polypropylene as a sea component to prepare a sea-island composite yarn, followed by eluting the island component with an aqueous alkali solution. However, when such a hollow fiber is manufactured through a leaching process after making a chart paper, there is a disadvantage that cost is invested inevitably and the health of a worker is concerned because a process is long and complicated and a chemical agent or the like must be applied.

In addition, the conventional hollow yarn has a disadvantage that it has a large cross-sectional area and high drapability compared to the single yarn fineness of the same single yarn fineness, and has a hard feeling and a poor gloss, making it difficult to use in high quality fabrics. Therefore, when the twisted yarn is subjected to a twist process to improve the hard feel and low gloss of the hollow fiber, there is a problem that not only the inherent light weight and warmth of the hollow fiber are deteriorated due to damage and deformation of the hollow fiber but also the dyeability is deteriorated.

In order to solve the above problems, the applicant of the present invention has proposed a new invention, that is, Korean Patent Publication No. 2005-0047037, entitled " The three types of C-shaped slits with a diameter of 0.4 to 1.0 mm are arranged so as to face the openings at the same angle and fused at the time of spinning to form a three-leaf clover shaped cross section. And solves the problem of reduction in cross-sectional formability due to defects and hollow openings. However, there is a possibility that the cross-sectional shape of the yarn having such a cross-sectional shape may be deteriorated due to the unfused and unfolded state as in the conventional hollow fiber according to the heating and cooling conditions, and even if the fusion occurs, the non- This is a disadvantage that can occur.

Accordingly, the present inventors have solved the above-mentioned problems of the prior art and have found that even after the twisting process, there is no damage to the end face and the hollow ratio is maintained at a high level to provide a lightweight and warmth characteristic inherent to the hollow fiber, As a result of a diligent study to provide a deformed cross-section yarn which can be applied to high-temperature thermal insulation clothing with gloss and the like, it is possible to provide a spinneret having a substantially M-shaped cross-section by attaching two slits of "U" The present inventors have found that the present invention can stably produce yarn while solving the above problems by providing an M-shaped cross-sectionally shaped cross-section yarn including air in an empty space between filaments.

Patent Document 1: Korean Patent Laid-Open Publication No. 2005-0047037 Patent Document 2: Korean Patent Laid-Open Publication No. 2001-0000008

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a hollow fiber membrane which is formed so that the cross-sectional formability of a conventional hollow fiber membrane is stabilized and a hollow ratio is maintained at a high level, The present invention is to provide a hollow-use spinneret which has a lightweight feeling and a warmth, has a soft touch like a face, and has a beautiful gloss and is capable of producing a hollow fiber which can be applied to high-

Another object of the present invention is to maximize the warmth, which is the ultimate purpose of the warm-up clothes including the hollow space by increasing the hollowness of the M-shape by manufacturing the yarn using the hollow using spinneret.

The present invention is also intended to reduce the cost and time by making the process shorter and simpler than the method of eluting composite fibers after manufacturing composite fibers, which are widely used for manufacturing conventional hollow fibers.

The present invention is also intended to solve the problem that the existing hollow fiber can exhibit the warmth and the like by producing the unevenness of the dyeing due to the unevenness of the shape by the M-shaped cross section instead of the circular hollow.

It is still another object of the present invention to provide a method of easily producing yarns with excellent productivity by using a spinneret having the above-described characteristics.

The present invention may also be directed to accomplish these and other objects, which can be easily derived by those skilled in the art from the overall description of the present specification, in addition to the above-mentioned and obvious objects.

The above object of the present invention is to provide a spinning and nailing design of an M-shaped cross-sectionally shaped cross-section yarn having two cross-sections of "U" letter shape and having an M-shaped cross section and containing air in the empty space between the filaments, It is possible to produce a high-quality modified cross-section yarn having improved hollowness and morphological stability and heat retention without being subjected to elution during the production of a hollow fiber.

In order to achieve the above object, the present invention provides a hollow spinning mouthwash having excellent warmth and flammability;

And the discharge port is located on a concentric circle having the origin of the circle as a origin, and the discharge port is an M-shaped spinneret with an alphabet letter, the width of the slit is 0.03 Mm to 0.06 mm, the length of the slit interval is between 0.03 mm and 0.07 mm, and the length of the slit / the length of the opening is between 0.5 and 1.0.

According to another aspect of the present invention, there is provided a hollow yarn manufacturing method using a hollow yarn spinneret having excellent warmth and flammability.

A method of producing a polyester filament yarn by discharging a polyester polymer having an intrinsic viscosity [?] Of 0.640 to 0.670 at a polymer discharge port arranged at a predetermined interval in a spinneret while maintaining a constant distance for a short time and cooling it by a cooling device Wherein the outlet of the spinneret is a spinneret having an English letter M shape, the width of the slit is between 0.03 mm and 0.06 mm, the length of the slit is between 0.03 mm and 0.07 mm, and the length of the slit / The length of which is in the range of 0.5 to 1.0, and cooling by the cooling device is performed by cooling the polyester filament yarn in such a manner that the annular cooling device of the filament yarn discharged from the detaching nozzle ejects the cooling air. .

According to another aspect of the present invention, the annular cooling apparatus is characterized in that the mounting position is attached to the lower portion 30 to 50 mm below the lower portion of the housing.

According to another aspect of the present invention, in the cooling device, the cooling air nozzles are assigned to each one of the cooling air nozzles.

According to still another aspect of the present invention, there is provided a cylindrical film having a specific size and shape, characterized in that the cooling device and the filament yarn cooled by the cooling device are cooled at a certain distance from the cooling device .

According to another embodiment of the present invention, the polyester polymer is characterized in that it contains 0.33 to 0.36% by weight of titanium dioxide (TiO ₂ ).

According to another embodiment of the present invention, the above-mentioned polyester polymer is characterized in that the polyester polymer is radiated and cooled through a spinneret in which a discharge port is present at a predetermined angle in a concentric circle centering on the center of the spinneret.

According to another aspect of the present invention, there is provided a hollow fiber having excellent warmth and flammability;

A polyester filament yarn produced by cooling a polyester polymer having an intrinsic viscosity [eta] of 0.640 to 0.670 while maintaining a constant distance between twisted yarns of a polymer discharged from a polymer discharge port arranged at a predetermined interval from the center of the filament, The width of the slit is between 0.03 mm and 0.06 mm, the length of the slit interval is between 0.03 mm and 0.07 mm, and the length of the slit / the length of the opening are in the range of 0.5 to 1.0 , And the cooling by the cooling device is carried out by cooling the discharged polyester filament yarn by attaching a cooling device of a central cooling type to 30 to 50 mm immediately under the nipping and to obtain a variation rate (CV %) Value exceeds 0 and becomes 1.00% or less.

According to another aspect of the present invention, the monoclinic fineness of the modified cross-section yarn is 1 denier or more and 2 denier or less.

The hollow fiber spinning and detaching method according to the present invention having excellent heat retention and flammability of the present invention having the above-described structure and the hollow fiber yarn manufacturing method using the hollow fiber yarn having the above- Which is excellent in heat resistance, and which is easy to manufacture.

1 is a schematic view of a spinneret outlet according to a preferred embodiment of the present invention,
Fig. 2 is a schematic view of a facility in terms of the location of detention and cooling facilities according to a preferred embodiment of the present invention; Fig.

Hereinafter, the present invention will be described in more detail with reference to the preferred embodiments. However, it is to be understood that the present invention is not limited by these embodiments, It will be obvious to those of ordinary skill in the art.

FIG. 1 is a schematic view of a spinneret outlet according to a preferred embodiment of the present invention, and FIG. 2 is a schematic view of a facility viewed from the side of a position of a spinneret and a cooling apparatus according to a preferred embodiment of the present invention.

As shown in Fig. 1, the discharge port of the spinneret according to the preferred embodiment of the present invention has a shape of an M-shaped cross section, and the elements that determine these cross sectional shapes are four zones, namely, a slit width A, B), the slit interval (C), and the slit length (D).

According to a preferred embodiment of the present invention, the length of the slit width A in FIG. 1 is preferably between 0.03 mm and 0.06 mm. If the length is smaller than this, clogging due to foreign matter may occur. It is difficult to realize the required pressure for the smooth discharge in the discharge space.

According to a preferred embodiment of the present invention, the length of C in FIG. 1 is preferably between 0.03 mm and 0.07 mm, and when it is less than this, there is a possibility that the impact due to the expansion of the ball- On the other hand, when the amount is larger than the above range, the two polymers are not fused so that the shape is not perfect and the uniformity and staining may be disadvantageous.

According to a preferred embodiment of the present invention, the value of D / B in Fig. 1 is preferably between 0.5 and 1.0. If it is smaller than this, the hollowness is remarkably low, so that the functionality of the insulation can not be expected. This value is a variable that can be changed according to the desired hollow rate, but it should be designed considering the discharge amount per unit area. The appropriate level of discharge per unit area is appropriate between 8.5 g / min.hole, ㎣ to 9.5 g / min.hole, ㎣ (assuming a polymer density of 1.18 g / ㎤).

According to the present invention, a method of manufacturing a yarn that can be used for a warm-feeling garment is such that a polymer polymer is discharged from a discharge port of a spinneret located in a concentric circle centering on the center, And then slowly cooled to room temperature. Thereafter, cooling is performed through a specific annular cooling device attached to the cooling device support, and the cooled polymer is passed through the oil supply guide, drawn through the godet roller, and finally wound around the winding equipment.

According to a preferred embodiment of the present invention, in the form of a spinneret used in the manufacturing method of the present invention, the number of holes as many as the number of strands to be discharged are spaced apart from each other at a constant interval, and a circular concentric circle It is preferable to use the one having the discharge port. In the case where the number of the discharge ports is large, the cooling air which has to reach the single yarn on the rear face by the single yarn close to the cooling device may be blocked, So it is not preferable.

According to another preferred embodiment of the present invention, a polyester polymer having an intrinsic viscosity of 0.640 to 0.670 discharged through a spinneret having the above-described shape is irradiated at a spinning temperature of 250 ° C to 350 ° C, more specifically 280 ° C to 300 ° C And cooled immediately after spinning with cooling air having a temperature of 15 ° C to 25 ° C through a cooling device having a structure as shown in Fig. 2 to produce a yarn.

Further, according to a preferred embodiment of the present invention, it is preferable that the cooling device is installed at 30 to 50 mm directly below the nipping. If the cooling device is located at the upper end, the temperature of the nipping is likely to be lowered. Filament of low fineness is undesirable because the flow can be severe.

The polymer solidified through the above-described cooling device is stretched through a lubricating roller, a stretch roller, a godet roller, and the like as in the conventional operation method, and is finally wound up to produce a product. Conventionally, when a yarn is radiated at a low fineness, a difference in solidification point occurs due to the distance between the discharge ports of the spinneret, the spinning fineness deviation between discharge ports, the deviation of the amount of discharged cooling air, the deviation of the cooling air speed, Resulting in irregularity and unevenness of fineness, and the inter-station variation caused staining unevenness, resulting in streaks and dyes. However, it can be seen that the polymers cooled through the cooling device according to the present invention are uniformly cooled because there is little variation in the distance from the cooling device, and it is possible to obtain a uniform cross-section yarn having excellent CV% of less than 1.00% .

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to these Examples.

Example 1

A polyester having a titanium dioxide content of 0.3% by weight and an intrinsic viscosity (?) Of 0.652 at a spinning temperature of 285 占 폚, a length of A of 0.04 mm, a length of C of 0.05 mm, The value of B was set at 1.0, and the circular array was set at 12 holes.

After spinning, a cooling device having a length of 40 cm was installed at 40 mm directly under the cage to spray the cooling air in the centrifugal direction from the center. The temperature at this time was set to 20 ° C and the wind speed to 25 m / min. The yarns were spinnished and stretched after spinning the yarn having a single yarn fineness of 1.5 denier, and the yarn thus obtained was measured for heat retention, dyeability, and CV% in single yarn fineness. The results are shown in Table 1 below.

Example 2

The yarn was produced in the same manner as in Example 1 except that the length of A was 0.06 mm, the length of C was 0.05 mm, and the value of D / B was 1.0 in Example 1.

Example 3

The yarn was produced in the same manner as in Example 1 except that the length of A was 0.04 mm, the length of C was 0.07 mm, and the value of D / B was 1.0 in Example 1.

Example 4

A yarn was produced in the same manner as in Example 1 except that the length of A was 0.04 mm, the length of C was 0.05 mm, and the value of D / B was 0.6 in Example 1.

Comparative Example 1

The yarn was produced in the same manner as in Example 1 except that the shape of the discharge port of the first embodiment was changed to a circular shape.

Comparative Example 2

The yarn was produced in the same manner as in Example 1 except that the D / B value of the draft outlet standard was changed to 0.3 in Example 1.

Comparative Example 3

In Example 1, a yarn was produced in the same manner as in Example 1 except that the annular cooling device was changed to a general one-side cooling device.

Experimental Example

The characteristics of the yarn produced according to each of the examples and comparative examples were evaluated as follows: fineness deviation, thermal insulation rate, yield of false twisting and dyeing stability.

- Finite element deviation (CV%) = Finite standard deviation / Finite average × 100 (%)

- Thermal insulation rate: KS K 0560: 2006, constant temperature method

The ratio between the calorific value emitted through the sample placed on the heating test plate and the calorific value calibrated when there is no sample

= (1-heating value when sample is present / heating value when sample is absent) × 100 (%)

- Wasted yield (%) = Stable morphological stability after burning / Total number of false twists × 100 (%)

- M ratio (staining stability) = good after dyeing yarn count / total yarn count × 100 (%)

division Item unit Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Detention
standard Outlet shape - M type M type M type M type circle M type M type A Mm 0.04 0.06 0.04 0.04 0.04 0.04 0.04 C Mm 0.05 0.05 0.07 0.05 0.05 0.05 0.05 B / D - 1.0 1.0 1.0 0.6 1.0 0.3 1.0 equipment Cooling device - fantasy fantasy fantasy fantasy fantasy fantasy One side characteristic Deviation of fineness CV% ◎ △ △ △ △ △ X Thermal insulation rate % 25.1 22.1 18.7 17.5 11.3 12.5 12.2 Misfire yield % ◎ ◎ ◎ ◎ ◎ △ X Staining stability % ◎ ◎ ◎ ◎ △ △ X

The characteristics of the yarn in Table 1 are shown as follows

Finite difference (CV%)

Less than 0.8: Good (⊚)

0.8 to less than 1.0: normal (?)

1.0 or higher: poor (X)

Wasted yield (%)

90 or more: Good (⊚)

80 to less than 90: Normal (△)

80 or less: poor (X)

M rate (%)

90 or more: Good (⊚)

80 to less than 90: Normal (△)

80 or less: poor (X)

As shown in Table 1, the polyester filament yarn produced according to Example 1 of the present invention has a stable shape because it saves time and cost during manufacture, and thus shows no deviation between single yarns and excellent dyeability.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims. It will be clear to those who have knowledge of.

①: Radiant polymer ②: Cooling equipment
③: Cooling system support base ④: Cooling air supply coupling part
⑤: Cooling air supply hose
A: slit width B: opening length
C: Slit distance D: Slit length

Claims

And the discharge port is located on a concentric circle having the origin of the circle as a origin, and the discharge port is an M-shaped spinneret with an alphabet letter, the width of the slit is 0.03 Wherein the length of the slit is between 0.03 mm and 0.07 mm, and the length of the slit / the length of the opening is between 0.5 and 1.0.

A method of producing a polyester filament yarn by discharging a polyester polymer having an intrinsic viscosity [eta] of 0.640 to 0.670 at a polymer discharge port arranged at a predetermined interval in a spinneret while maintaining a constant distance for a short time and cooling by a cooling device Wherein the outlet of the spinneret is a spinneret having an English letter M shape, the width of the slit is between 0.03 mm and 0.06 mm, the length of the slit is between 0.03 mm and 0.07 mm, and the length of the slit / The length of which is in the range of 0.5 to 1.0, and cooling by the cooling device is performed by cooling the polyester filament yarn in such a manner that the annular cooling device of the filament yarn discharged from the detaching nozzle ejects the cooling air. Which is excellent in thermal insulation and flammability.

The method of manufacturing a hollow fiber spinning nozzle according to claim 2, wherein the mounting position of the annular cooling device is attached to a lower portion of 30 to 50 mm from a position immediately under the nipping.

The method of manufacturing a hollow fiber spinning nozzle according to claim 2, wherein the cooling air nozzles of the cooling device are arranged one by one per one opening.

The cooling device according to claim 2, characterized in that the cooling device and the filament yarn cooled by the cooling device are cooled at a certain distance from the cooling device by being attached to the center of the cooling field of the yarn with a cylindrical film having a specific size and shape A method of manufacturing a hollow fiber using a spinneret for hollow use excellent in thermal insulation and flammability.

In the polyester polymer is 0.33 to 0.36% by weight of titanium dioxide (TiO ₂₎ that contains the hollow fiber characterized by thermal insulation and method of producing a combustible with a high hollow fiber using a spinneret to which a claim 2.

A polyester filament yarn produced by cooling a polyester polymer having an intrinsic viscosity [eta] of 0.640 to 0.670 while maintaining a constant distance between a polymer discharged from a polymer discharge port arranged at a predetermined interval from the center of the filament, The width of the slit is between 0.03 mm and 0.06 mm, the length of the slit interval is between 0.03 mm and 0.07 mm, and the length of the slit / the length of the opening are in the range of 0.5 to 1.0 , And the cooling by the cooling device is carried out by cooling the discharged polyester filament yarn by attaching a cooling device of a central cooling type to 30 to 50 mm immediately under the nipping and to obtain a variation rate (CV %) Value exceeds 0 and becomes 1.00% or less. &Lt; / RTI >

8. The hollow fiber according to claim 7, wherein the monofilament fineness of the modified cross-section yarn is 1 denier or more and 2 denier or less.