KR101869415B1 - Process Of Producing Flaim―Retardant Polyester Airjet Spun Yarn Having Excellent Flaim―Retardant Property, Uniformity And Friction Resistance - Google Patents

Abstract

The present invention relates to a flame retardant polyester yarn blended yarn containing flame retardant polyester fiber alone or a flame retardant polyester yarn blended yarn containing flame retardant rayon fiber. The flame retardancy and hygroscopicity performance of the flame retardant polyester and the flame retardant rayon fiber It is possible to provide an air jet yarn having excellent uniformity due to air spinning, a clean appearance due to the reduction in blade, and resistance to abrasion while maximizing.

Description

Technical Field [0001] The present invention relates to a method for producing a flame retardant polyester air jet yarn excellent in flame retardancy, uniformity and abrasion resistance,

The present invention relates to a method for producing a mixed yarn of a flame retardant polyester air jet system containing only a polyester fiber having a flame retarding function or containing flame retardant rayon.

As the economy develops and the quality of life increases, the perception of life changes. Therefore, measures against fire are the most important measures, and there is always a risk even if the system is well equipped. Therefore, various protective fabrics for heat and fire have been developed, and demand for outdoor flame retardant fabrics such as mountain climbing, camping, and leisure is increasing not only in the field of industrial protective clothing exposed to heat.

In order to impart a flame retardant function to protect the human body against such heat, flame retarding organic fibers such as meta-based or para-aramid fibers, modacrylic, ribenzimidazole, polybenzoxysol and flame retardant rayon, Is treated with an artificial flame retardant. Flame Retardant Organic Fiber It gives permanent flame retardancy and high flame retardancy, but it is expensive and limited to special industry protection. Flame retardant fabrics treated with cotton or polyester are low cost and can be used in various fields. However, they are poor in washing durability, stiff fabrics due to flame retarding process, and are poor in wearing feeling. When carbonized by heat, toxic gas such as formaldehyde is generated Gradually, usage is declining.

Therefore, the development of products utilizing flame retardant polyester which has excellent flame retardancy and stable chemical properties and can be supplied at a relatively low price has been developed variously. However, due to the high strength of the flame-retardant polyester, It does not fall off and lint is generated, the fabric and appearance of the fabric are dropped, and the frictional resistance is weak, so its use is limited.

Korea Patent Registration No. 10-1432928 (Notice of August 21, 2014)

Therefore, the present invention solves the problems of the prior art, and provides a yarn having a clean appearance and a frictional resistance due to excellent uniformity by air jet spinning while reducing the flame retardancy and chemical resistance of the flame retardant polyester fiber As a technical task.

Therefore, according to the present invention, a sliver made of a flame retardant polyester fiber having a fiber length of 32 to 55 mm was manufactured, and a roller gauge of 42 to 56 x 43 to 58 x 44 to 65, a back draft of 1.1 to 2.0, 1.0 to 1.5 and total draft 6.5 to 8.5, the sliver was supplied to a Murata Vortex Cylinder, and the roller gauge 43 to 56 x 39 to 58 x 41 to 60, the back draft 2.5 to 3.2, (Draft) of 1.5 to 2.5, main draft 25 to 45, and total draft 150 to 250, and then fed at a spindle hole diameter of 1.0 to 1.2 mm at a feed rate of 280 to 400 m / min, and then winding the yarn after the yarn is formed into a yarn having a flame retardancy, a uniformity and an excellent frictional resistance.

Hereinafter, the present invention will be described in detail.

The present invention relates to a method for producing a flame retardant polyester air jet yarn using a flame retardant polyester alone or a flame retardant polyester and a flame retardant rayon fiber by using an Murata Vortex spinning machine using a ceramic nozzle, .

In the method for producing a flame retardant polyester air jet yarn of the present invention, fibers cut by a predetermined length are mixed and carded to produce a sliver, followed by softening, drafting to reduce the fineness of the sliver, This process is performed in the order of supplying the yarn to the spinning machine of the Vortex (Murata Vortex), spinning after forming the yarn.

The flame-retardant polyester fiber used in the present invention is a fiber which is prepared by mixing any one or more of a phosphorus-based flame retardant and a bromine-based flame retardant, and has a LOI of 26 to 38, a fiber fineness of 1.0 to 3.0 dtex, a fiber length of 32 to 55 mm, 6.5 g / d, and elongation of 20 to 40%.

The flame retardant polyester fiber of the present invention may be used as the flame retardant polyester fiber of 32 to 55 mm. However, one or more of the flame retardant rayon fiber and the anti-static fiber may be further mixed to provide comfort or antistatic property. The flame retardant rayon fiber is a flame retardant rayon fiber having a fiber fineness of 1.0 to 3.0 dtex, a fiber length of 32 to 55 mm, a strength of 1.5 to 3.5 g / d, an elongation of 6 to 20% and an LOI of 28 to 32. The antistatic fiber has a fiber fineness of 2.0 to 3.5 dpf, a fiber length of 35 to 55 mm, a strength of 1.5 to 5.5 g / d, and an elongation of 30 to 60%. The carbon fiber, By using radiated fibers It exhibits excellent antistatic property. The antistatic fiber has antistatic conductivity at a weight ratio of 1 to 3% in the total weight ratio in the yarn. It is preferable that the fibers are cut and used so as to have a fiber length of 32 to 55 mm, which is excellent in the spreadability, yarn strength, elongation and uniformity.

 Particularly, the flame retardant polyester fiber is a hydrophobic fiber, which improves the strength and quick drying property of the spinning yarn, and the flame retardant rayon fiber provides hydrophilicity and comfort with the hydrophilic fiber.

It is also possible to use only flame retardant polyester fiber in whole yarn. When blending with flame retardant rayon, the weight ratio of flame retardant polyester fiber to flame retardant rayon is most preferably 70:30 to 90:10. The flame retardant polyester fiber and the flame retardant rayon differ in the mechanism of the flame retardant function from each other, and the flame retardancy is greatly deteriorated at an equal weight ratio. Therefore, the weight ratio of the polyester fiber is preferably 70% or more in light of the strength and flame retardancy. The higher the weight ratio of the polyester is, the better the flame retardancy is, but the hygroscopicity is poor. Therefore, the weight ratio of the flame retardant polyester and the flame retardant rayon is 80:20 Is most preferable.

The tows of the prepared fibers are supplied to a cotton machine and are carded to remove impurities, staple fibers and other fabrics. At the same time, the tows are arranged in a line and supplied to a soft process, which is a later process, to draft.

Combination of flame retardant polyester and flame retardant rayon fiber can be blended in toe state in soft process, but raw fiber blending is effective in homogeneous blend process in homogeneous blend process.

In the present invention, hopper-type lattice blend having the raw material fiber feeding device attached automatically after weighing is adopted, and the fiber damage is suppressed to the utmost One opening beater was used for this purpose. A cylindrical spike beater is used as the opening beater, and uniform mixing of fibers of different kinds can be achieved at a beater rotation speed of 900 and a beater gauge of 8 to 12 mm.

After the horn face is completed, the fiber web is supplied to the flat type face horn, and the card is passed through the horn face, so that only one bitter passes through the horn face, so that the three hook- Respectively.

It is preferable that the number of rotations of the takeer-in is 1st 1380 (rpm), 2nd 2156 (rpm), 3rd 2841 (rpm), cylinder rotation speed 410 and flat speed 220 m / min. -13-13-13-13 (inches / 1000) to effectively remove impurities, staple fibers, and other debris while preventing damage to the raw fiber, and arranging the fibers in a line and making them into slivers.

In the softening process, the sliver is supplied to the doubling machine to reduce the fineness of the sliver and to improve the uniformity. The roller gauge must be changed according to the fiber length of the fiber supplied in the four-wire drafting system. Generally, when a fiber length of about 40 mm is set, it is 47 × 47 × 52 mm, the back draft is 1.1~2.0, the total draft is 6.50~8.50, the doubling is suitable for 6~8 slivers, When the fiber length is about 50 mm, 54 × 56 × 58 mm is suitable. In the present invention, it is preferable to perform the softening process under the conditions of roller gauges 42 to 56 x 43 to 58 x 44 to 65, back drafts of 1.1 to 2.0, inter draft of 1.0 to 1.5, and total draft of 6.5 to 8.5. The flame-retardant polyester used as the raw material used in the invention is a polyester fiber containing a flame retardant and has a lower elongation than that of a general polyester and has a low filling force between the fibers and easily falls into a draft force acting thereon, . Therefore, it is advantageous to have less flame retardancy and quality than ordinary polyester spinning. In particular, when flame retardant polyester is subjected to friction in various drafting regions, the fibers are broken and scattered into the air from the process in the form of dust, so that the production speed is lowered and the total draft is lowered to produce a clean yarn with good appearance and uniformity.

The sliver is supplied to a draft portion located at the upper end of the nozzle of the Murata Vortex spinning machine, and is drawn by the draft roller to reduce the fineness. The draft section is a four-wire draft section, and the roller gauge is determined by the fiber length, draft size, sliver thickness and yarn fiber properties of the supply yarn, and should be determined within a range in which the generation of floating fibers is small and the severance of the long fibers is minimized . When the fiber length of the supplied fiber is about 40 mm, it is preferable that the roller gauge is about 43 × 39 × 41 mm, and when the fiber length of the supplied fiber is about 50 mm, the roller gauge is widened to be about 56 × 54 × 58 mm. Therefore, it is possible to change the roller gauge according to the fiber length. When the sliver composed of the flame retardant polyester fiber with the fiber length of 32mm ~ 55m is supplied, the thickness of the sliver is made narrower in the English number Nec 0.15 ~ 0.17 in order to lower the total draft, The second draft is 1.5 to 2.5, and the main draft 25 to 45 total draft 150 to 250 is preferable.

The flame retardant polyester is a polyester fiber containing a flame retardant. Since the elongation of the polyester fiber is lower than that of a general polyester fiber and the forming ability of the fiber is lower, the backdraft and the interdraft are less than ordinary polyester, It is advantageous. In particular, when flame retardant polyester is subjected to friction in various drafting regions, the fibers are broken and scattered into the air from the process in the form of dust, so that the production rate is generally lowered and the total draft is lowered to produce a clean yarn with good appearance and uniformity.

The flame retardant polyester fiber contains the antistatic antistatic agent. In the air jet spinning, the antistatic agent is adhered to the spindle, which interferes with the flow of air which twists, and thus it is impossible to manufacture an air jet yarn with high binding force. Therefore, in order to twist the spinning yarn during spinning of the air jet, the antistatic agent contained in the flame-retardant polyester is compressed by the compressor compressed air supplied to the nozzle of the air jet spinning machine so as to be cleaned without being adhered to the twisted spindle A separate water-soluble surfactant must be mixed and supplied. The feed rate of the water-soluble surfactant is pumped 0.8 times per second. A pumping pressure of 4.5 kg is appropriate. The water-soluble surfactant may be an anionic, cationic, nonionic or amphoteric surfactant as a substance that increases the washing power. The surface active agent is sprayed with a surfactant by connecting a separate pipe supplying a surfactant to a pipe of a compressed air supplied to give a twist in the air jet spinning machine to make compressed air for the production of an air jet spinning yarn containing a surfactant When the air jet is sprayed, the air is supplied to the air jet nozzle hole 14b of FIG. 2 and used as air to impart twist when spinning.

Hereinafter, the drawings of the European patent application No. 03005279.9 (filed on March 10, 2003) of the maker of Murata Vortex spinning machine and the description of the invention will be described with reference to the drawings. The Murata Vortex spinning machine used in the present invention is constituted by a sliver 1, a back roller 2, a 3 ° roller 3, a 2 ° roller 4, a front roller 5, a nozzle 6, the spinning yarn 7, the nip roller 8, the feed roller 9, the clear portion 10 and the yarn package 11, and the drawing operation in the draft portion has been described above.

The fibers passing through the draft portion as described above are formed into yarns in the nozzle 6 of FIG. 1. The yarn forming process will be described with reference to FIG. The fibers are guided to the guide hole 13a by the suction fluid generated in the vicinity of the fiber guide block 13 by the airflow injected from the nozzle hole 14b in the nozzle member 14 and the fibers are guided to the periphery of the needle 13b And enters the spinning chamber 14a.

The fiber is sucked into the spinning chamber 14a and injected from the nozzle hole 14b to be subjected to the action of an air current swirling around the tip portion 15a of the hollow guide rod 15. [ Some of the fibers separated from the fibers may be turned upside down and may wrap the periphery of the tip portion 15a of the hollow guide rod 15. [

Moreover, the fibers swing around the formed yarn and wrap the outer circumference of the yarn. The fibers are twisted in the direction of the swirling air current. Furthermore, a part of the twisted portion tends to be propagated to the front roller 5 by the swirling airflow. The needle 13b serves to prevent the propagation phenomenon in order to prevent the fibers supplied from the front roller 5 from being twisted by the twist.

Fibers twisted by a swirling air current are formed by twisted yarns and form a core fiber and a wrapping fiber. The yarn yarn passes through the spinning yarn passage 15b inside the hollow guide rod 15 and is discharged through the yarn yarn discharging port 15c.

In the present invention, the nozzle (6) uses a nozzle having a nozzle diameter of 1.0 to 1.2 mm to improve the twist of the yarn. When the thickness exceeds 1.2 mm, the binding force of the lapping fibers of the twist portion is lowered, and the strength is lowered and the number of yarn is increased.

The yarn 7 thus formed passes through the clear portion 10 between the nip roller 8 and the delivery roller 9 in Fig. 1 to remove the non-spinning fiber, Is wound.

According to the present invention, the flame retardant polyester fiber and the flame retardant rayon fiber are mixed with each other only by the flame retardant polyester fiber according to the above-described production method, and the core portion having the fibers arranged in the yarn advancing direction and the flame- Polyester and flame retardant polyester / rayon air jet mixed yarns are provided. The flame retardant polyester / rayon air jet mixed yarn exhibits the best flame retardancy and hygroscopicity when the ratio of the flame retardant polyester is 80% and the ratio of the rayon is 20%. The air jet spinning yarn has a fineness of Nec of 10 to 50, a specific strength of 15 to 25 cN / tex, an elongation of 7.5 to 10.5% and a uniformity (U) of 10.0 to 14.0% It has excellent frictional resistance due to fiber wrapping structure. Also, the generation amount of hair (hairy hair) of the yarn is Uster Evenness Tester, which has a Moh index value of less than 5.0, and thus has a fine appearance and is resistant to friction. Also, the fabric fabrics made from the yarns have a peeling grade of 4 or more and excellent in durability against washing.

Therefore, according to the present invention, it is possible to provide a yarn having a clean appearance and a frictional resistance due to excellent uniformity due to air spinning while reducing flame retardant polyester or flame retardant polyester and mixing flame retardant rayon fibers to maximize performance .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the structure of a Murata Vortex spinning machine used for producing the flame retardant polyester ter-jet yarn of the present invention.
2 is a cross-sectional view showing a nozzle structure of a Murata Vortex spinning machine used for producing a flame retardant polyester air jet yarn of the present invention.
3 is a carbonated photograph of a flame retardant fabric according to Example 3 of the present invention, which was tested for flame resistance.
4 is a carbonized photograph of a flame retardant fabric according to Example 4 of the present invention, which was tested for flame resistance.

The following examples illustrate non-limiting examples of the process for preparing the flame retardant polyester air jet yarns of the present invention.

[Example 1]

A polyester fiber containing a phosphorus flame retardant having a fiber fineness of 1.3 dpf, a fiber length of 40 mm, a strength of 5.8 g / dtex, and an elongation of 26% was prepared, and a polyester spunbonded with a cylinder spike bitter on a hopper- The carding sliver of Nec 0.13 was manufactured at a number of 410, the number of revolutions of the first decade 1380, the 2nd 2156, and the 3rd 2841, , And total draft (6.50) were prepared, and 0.15 number of Nec soft slivers were prepared.

The prepared softness sliver was supplied to a Murata Vortex Cylinder and passed through an elongation unit having a roller gauge of 43 × 39.5 × 41 (mm), a back draft of 3.0, an inter-draft of 1.5 and a main draft of 41 and a total draft of 245 as a four- An air jet yarn was produced at a feed rate of 370 m / min and a Nec 40 number of fibers while spraying dry air with a nozzle of 1.1 mm at 5.5 kg / cm 2.

[Example 2]

A polyester fiber containing a phosphorus flame retardant having a fiber fineness of 1.5 dpf, a fiber length of 51 mm, a strength of 5.4 g / dtex and an elongation of 28%, a polyester fiber having a fiber fineness of 2.0 dpf, a fiber length of 51 mm, a strength of 2.2 g / The fibers were carded at the ratio of 80:20 by weight in the same manner as in Example 1. The soft sliver was produced in the same draft as in Example 1 with a soft roller gauge of 54 x 56 x 58 mm, , A feed rate of 370 m / min, and a roller gauge of 56 x 54 x 57 mm, a flame retardant polyester / flame retarded rayon blend air jet yarn was produced.

[Example 3]

A flame retardant fabric having a basis weight of 210 g / m < 2 > was produced using the flame retardant polyester yarn No. 40 prepared in Example 1.

[Example 4]

Flame retardant fabric having a basis weight of 210 g / m < 2 > was prepared using 40 flame retardant polyester / flame retardant rayon yarns prepared in Example 2.

[Comparative Example 1]

Flame retardant polyester yarns using ring spinning were prepared for comparison with air jet yarns. The same fiber material as in Example 1. A ring spun yarn with a ring spindle RPM of 15,000 and a twist of 970 TPM was produced through a four-wire type process after the sintered sliver was manufactured with the same surface as the flame retardant polyester fiber and the soft roll roller gauge and the draft condition.

[Comparative Example 2]

A flame retardant fabric having a basis weight of 210 g / m < 2 > was prepared using the flame retardant polyester yarn No. 40 prepared in Comparative Example 1.

division Example 1 Comparative Example 1 Example 2 Mixed rate Flame Retardant Polyester
(100) Flame Retardant Polyester
(100) Flame Retardant Polyester
- Flame Retardant Rayon
(80/20) Nec 40/1 40/1 40/1 Actual count 40.6 / 1 39.5 / 1 40.7 Number CV% 1.25 1.31 1.15 Strong (cN / tex) 23.9 21.5 16.2 Shinto (%) 9.99 11.2 9.85 Uniformity (U%) 12.4 13.5 12.3 Thin place
(EA / km) 5 25 6 Thick place
(EA / km) 15 32 25 Nep place
(EA / km) 8 35 12 Hairness H 4.57 6.85 4.08

division Example 3 Example 4 Comparative Example 2 Weight of fabric (g / ㎡) 208.5 215.0 212.3 Flammability Carbonization distance (cm) 6 9 12 Time (in seconds) 0 One One The tensile strength Slope (N) 910 850 853 Weft (N) 690 670 670 Phosphorus strength Slope (N) 30 28 29 Weft (N) 22 26 23 Peeling class 4.5 4.5 3.5

1: Sliver 2: Back roller
3: 3 ° roller 4: 2 ° roller
5: front roller 6: nozzle
7: Spunlace yarn 8: Nip roller
9: Feed roller 10: Clear part
11: yarn package 13: fiber guide block
13a: Induction hole 13b: Needle
14: nozzle member 14a: spinning chamber
14b: Air jet nozzle hole 15: Hollow guide rod
15a: tip portion 15b: yarn passage
15c: yarn discharge port

Claims (8)

A sliver composed of 32 to 55 mm fiberglass polyester fiber was fabricated and used as a roller gauge of 42 to 56 × 43 to 58 × 44 to 65, a back draft of 1.1 to 2.0, an Inter draft of 1.0 to 1.5, The sliver was supplied to a Murata Vortex Cylinder in the condition of 6.5 to 8.5. The sliver was supplied to a roller gauge of 43 to 56 x 39 to 58 x 41 to 60, a back draft of 2.5 to 3.2, an inter- The draft of the draft rollers of 2.5 to 2.5, the main draft of 25 to 45, and the total draft of 150 to 250, and then the compressed air containing the surfactant is supplied to the air jet nozzle hole during the air jet spinning process, A method for producing a flame retardant polyester air jet yarn excellent in flame retardancy, uniformity and frictional resistance, comprising spinning a yarn at a feed rate of 280 to 400 m / min at a hole diameter of 1.0 to 1.2 mm. delete delete The method according to claim 1,
The flame retardant polyester fiber was prepared by mixing LOI 26 to 38, a fiber fineness of 1.0 to 3.0 dtex, a fiber length of 32 to 55 mm, a strength of 4.0 to 6.5 g / d, And an elongation of from 20 to 40%. The flame retardant polyester air jet yarn is excellent in flame retardancy, uniformity and frictional resistance. delete The method according to claim 1,
Wherein the fineness of the air jet spinning yarn is 10 to 50 Nec. delete The method according to claim 1,
A method for producing a flame retardant polyester air jet yarn excellent in flame retardancy, uniformity and frictional resistance, characterized in that the amount of moth (hairs) generated in the yarn is the Uster Evenness Tester and the value of the Moe index is 5.0 or less.

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