KR100957866B1 - Modified cross-section Spinneret for artificial turf and spinning device including the same and the fiber prepared using the same - Google Patents

Abstract

The present invention relates to a release cross-section spinneret for artificial turf, and a spinning device including the same, and a yarn manufactured using the same, wherein the cross-sectional shape of the release cross-section spinneret is a release Sza, upper middle protrusion, lower middle protrusion, and left horizontal protrusion. The upper and lower central projections each having a length L ₁ of the total central projection between the upper middle projection and the lower central projection, and the thickness B ₁ of each of the upper and lower central projections are inclined in opposite directions. It has a length L ₂ of the total horizontal projections between the left and right horizontal projections in the horizontal direction in the center between the upper and lower central projections, and the thickness B ₂ of the horizontal projections of the left and right, respectively The left and right horizontal protrusions are formed to form a, the length L ₁ is shorter than L ₂ , B ₁ is larger than B ₂ , the end of each protrusion is Heterospun cross-section spinnerets for artificial turf, which have excellent flexural modulus, abrasion resistance, and uprightness on piles, and spinning devices comprising the same It relates to a yarn manufactured by.

Deformed section, Yarn, Detention, Artificial turf, Yarn

Description

Modified cross-section spinneret for artificial turf and spinning device including the same and the fiber prepared using the same}

The present invention relates to a modified cross-section spinneret for artificial turf, and a yarn manufactured using the same, and a method for manufacturing the same, more specifically, by using a spinneret of a modified form, excellent flexural elasticity, abrasion resistance, and pile uprightness are expressed. It relates to a cross-section spinneret for artificial turf being artificial grass and a yarn for artificial turf produced using the same.

Until now, the development of raw materials which are similar to natural grass and at the same time more durable than natural grass have continued. The first generation of artificial turf yarns were crimped polyamide-6-based yarns, which were tough and had excellent weather resistance and abrasion resistance. There was a risk of injury such as burning or burns. Subsequently, the surface frictional force was reduced by using polypropylene yarn instead of polyamide in the second generation, but it was insufficient to realize sliding properties, which are similar to natural grass. Therefore, by the third generation, the sliding resistance was lowered using polyethylene yarn, and the appearance and emotional characteristics (touch) most similar to those of natural grass were expressed. In addition, there were many morphological changes as well as the raw material of the yarn. The fibrate form of the yarn is 10-12 mm wide and the monofilament form of the narrow width 2-4 mm wide. Was used. The fibrillate is extruded to a thickness of 100 to 130 μm of a wide film of about 50 cm or more, and then wound into 10 to 12 mm widths to be wound. Since the uprightness is high, it is advantageous for filling operations of silica sand and elastic bodies. However, the fibrillate has a wide width, but relatively thin, which is disadvantageous to wear resistance caused by sports such as football, and is torn in production. There is a disadvantage that cannot be implemented. In addition, in the fibrillate manufacturing process, since the yarn is formed torn, a high draw ratio of about 7 to 8 times is required to secure its workability. In addition, the cross-sections of the fibrate prepared by tearing the film of the rhombus extruded through the T-Die designed in the shape of rhombus (Split) may be in the form of heterogeneous cross-sections different from each other. However, since the above method is formed by tearing, the stretching step is essential, but the draw ratio is different for each part, so that physical properties such as strength may be different due to the imbalance thereof.

On the other hand, the monofilament is spun through a mold having a certain shape to realize the characteristics of the natural grass, the thickness is 250 ㎛ or more thicker than fibrillates, narrower than the width of the pile due to external forces such as shear or vertical stress Excellent wear and long life of the grass, it can have an optimal elongation and strength through the control of the draw ratio during spinning. However, there is a disadvantage in that the elastic modulus due to external force is low because the surface density of the product is narrow when the yarn of the same weight is used because the width is narrower than the fibrillate.

Accordingly, Korean Patent Invention No. 423482 discloses a mold used for melt spinning by using a thermoplastic polymer such as polyethylene terephthalate, thereby maximizing the voids of the yarn to speed up the absorption and dissipation of sweat, and also due to mold release. The present invention relates to a spinneret for manufacturing a cross-section yarn having a comfortable wear by minimizing contact area with the skin, and to a cross-section cross-section yarn manufactured using the same. It has been proposed to be arranged symmetrically in the centerline in the form of a "U-shape". However, in the case of the C-shaped or U-shaped, the absorbency is enhanced, there is a disadvantage that the uprightness of the yarn, flexural modulus and durability thereof can not be secured in the application to artificial grass.

In addition, in International Patent Publication No. 2005-5731, artificial turf filaments having two wings at the center and having a shape of maintaining the angle between the wings 110 to 120 ° and having a deformed cross section having a protrusion at the center and both wings. Has been proposed. In addition, the filaments of each of the release cross-sections are arranged one or alternately, one filament is wrapped in a spiral of a helical structure to impart strength to the fiber, such as uprightness and elastic modulus. However, in providing the strength, the form of wrapping one fiber is not only troublesome in production operation, but also has a disadvantage in that satisfactory flexural modulus and uprightness are difficult to secure.

In order to solve the above problems, an object of the present invention is to give a similar feel to natural grass, and to provide artificial turf that is produced artificial turf that expresses the elastic recovery rate and uprightness on the pile, and the yarn produced using the same It is to provide a method for producing the same.

Still another object of the present invention is to manufacture artificial turf using a spinning device having a plurality of spinnerets having a shape of a cross section, but to vary the shape of the plurality of spinnerets so as to have conditions representing the optimum characteristics of the artificial turf. It is to provide a mold release cross-section spinneret for artificial turf, and a yarn manufactured using the same, and a method of manufacturing the same for improving productivity.

In order to achieve the above object, the present invention is a cross-sectional shape of the release cross-section spinneret for artificial turf, the cross-sectional shape of the release cross-section spinneret is composed of the upper middle protrusion, the lower middle protrusion, the left horizontal protrusion and the right horizontal protrusion, The upper and lower middle protrusions having the length L ₁ of the entire central protrusion between the upper middle protrusion and the lower middle protrusion, and the thickness B ₁ of each of the upper and lower middle protrusions are inclined in opposite directions, and the upper middle protrusion and the lower side protrusion Left and right horizontal horizontal cross-shaped arcs having a length L ₂ of the horizontal horizontal projections between the left and right horizontal projections and a thickness B ₂ of each of the left and right horizontal projections in a horizontal direction from the center between the central projections. characterized in that a projection is included, the length L ₁ is shorter than L _2, B ₁ is larger than B _2, the end of the projection is processed to form round Provides a modified cross-section spinneret for artificial grass.

In addition, the present invention is to form a shorter and thicker than the left and right horizontal projections in the state in which the upper and lower central projections are inclined at the θ angle relative to the horizontal projections in the release S-ja to strengthen the bending moment of the yarn It is possible to maintain the upright state of the yarn, and the left and right horizontal protrusions are formed to be longer and thinner than the upper and lower center protrusions with mutually intersecting arcs so that the radiated yarn can express the bending property of each of the protrusions It provides a release cross-section spinneret for artificial turf, characterized in that the end is treated in a round to satisfy the following conditional formulas (1) to (3).

(1) 1 <L ₁ / B ₂ ≤ 5

(2) 2 ≤ L ₂ / B ₁ ≤ 6

(3) 30 ≤ Θ ≤ 70

L ₁ : Length of the entire center projection between the upper middle projection and the lower middle projection

L ₂ : Length of the entire horizontal protrusion between the left and right horizontal protrusions

B ₁ : the thickness of the middle projection of each of the upper and lower sides

B ₂ : thickness of each horizontal protrusion on left and right sides

Θ: angle of inclination of the central projection (°)

In addition, the present invention provides a release cross-section spinneret for artificial turf, characterized in that the ratio between the center projection and the horizontal projection length of the release S satisfies the following formula (4).

(4) L ₁ : L ₂ = 1: 1.5-5

In addition, the present invention is a spinning apparatus comprising a hetero-section spinneret for artificial turf, comprising a plurality of spinnerets containing one or more hetero-spinner spinneret, each of the plurality of spinnerets constitute a sector in the circumferential direction, Each sector or between the spinneret maintains an angle of 1 to 10 °, wherein the spinneret between each sector or in the sector comprises the same, or different cross-section spinnerets for artificial turf, characterized in that the same or differently configured Provide a spinning device.

In addition, the present invention is a release section yarn for artificial turf, the cross-sectional shape of the yarn is a release S-shaped, consisting of the upper middle projections, the lower middle projections, the left horizontal projections and the right horizontal projections, between the upper middle projections and the lower central projections The upper and lower central projections having the length L ₁ , the thickness B ₁ of each of the upper and lower central projections, are inclined in opposite directions, and are horizontally at the center between the upper and lower central projections. The length of the horizontal horizontal projection between the left and right horizontal projections L ₂ , the thickness of the horizontal projections of each of the left and right horizontal projections B ₂ , and the left and right horizontal projections are formed alternately arcuate, length L ₁ Is shorter than L ₂ , B ₁ is larger than B ₂ , and the end of each protrusion is provided in a rounded form, providing a cross-section yarn for artificial turf. All.

In addition, the present invention is to form a shorter and thicker than the left and right horizontal projections in the state inclined at the θ angle with respect to the horizontal projections in the release S-ja, reinforcing the bending moment of the radiated yarn It is possible to maintain the upright state of the yarn, and the left and right horizontal protrusions are formed to be longer and thinner than the upper and lower center protrusions with mutually intersecting arcs so that the radiated yarn can express the bending property of each of the protrusions It provides a release section yarn for artificial turf, characterized in that the end is treated in a round to satisfy the following conditional formulas (1) to (3).

(1) 1 <L ₁ / B ₂ ≤ 5

(2) 2 ≤ L ₂ / B ₁ ≤ 6

(3) 30 ≤ Θ ≤ 70

L ₁ : Length of the entire center projection between the upper middle projection and the lower middle projection

L ₂ : Length of the entire horizontal protrusion between the left and right horizontal protrusions

B ₁ : the thickness of the middle projection of each of the upper and lower sides

B ₂ : thickness of each horizontal protrusion on left and right sides

Θ: angle of inclination of the central projection (°)

In addition, the present invention provides a release section yarn for artificial turf, characterized in that the ratio of the center projection and the horizontal projection length of the release S satisfies the following formula (4).

(4) L ₁ : L ₂ = 1: 1.5-5

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

In the present invention, the spinneret means a discharge port that determines the shape of the filament during spinning. In addition, the spinning device is a device for spinning at the same time for the formation of a plurality of filaments, means a device composed of a plurality of spinnerets arranged.

1 is a cross-sectional view of a spinning apparatus according to a preferred embodiment of the present invention. Referring to FIG. 1, the radiator 10 has a plurality of spinnerets arranged in a circumferential direction, and includes eight sectors, and the angle α between the sectors maintains 1 to 10 °. The spinneret within the said angle range also arranges spinneret in the said angle range also inside. If the angle is less than 1 °, the spinning of yarns will occur, and if it exceeds 10 °, the uniform arrangement of the yarns will be impossible. . The shape of the cross-section of each spinneret constituting the spinning device may be configured in the same shape, may be configured in different forms, the shape of the spinneret per sector or in the sector is the same or different Can be configured.

Figure 2a is a cross-sectional view of the release S-shaped spinneret according to an embodiment of the present invention. Referring to FIG. 2A, The cross-sectional shape of the unit spinneret constituting the spinning device 10 is a release S (S), the release S 100 is composed of the upper middle projection 111, the lower middle projection 113, the left horizontal projection 131 and the right horizontal projection 133. , The upper and lower central projections 111 and 113 having the length L ₁ of the total central projection between the upper middle projection and the lower central projection, and the thickness B ₁ of each of the upper and lower central projections are inclined in opposite directions, respectively, The inclination of the central protrusion 111 is limited to an acute angle range of 30 to 70 ° based on the right horizontal protrusion 133, and the lower middle protrusion 113 is connected in a straight line with the inclined upper middle protrusion 111, and the upper middle protrusion and the lower side of the total horizontal projection of the horizontal projections between the left-right horizontal protrusion in the horizontal direction in the middle between the central protrusion the length L _2, the left and right thickness B ₂ of the respective horizontal projections And it includes the left and right horizontal cross-staggered protrusions 131 and 133 formed to draw an arc. Here, the length L ₁ is shorter than L ₂ , B ₁ is larger than B ₂ , and the ends of each of the protrusions are rounded.

In the release Sza 100, the upper and lower central projections 111 and 113 are shorter and thicker than the left and right horizontal projections while being inclined at an acute angle of 30 to 70 ° based on the right and left horizontal projections 133 and 131, respectively. It is possible to maintain the upright state of the yarn by reinforcing the bending moment of the yarn formed by spinning, the left and right horizontal projections 131 and 133 is a long and thinner than the upper and lower center projections with a mutually intersecting arc to form a good spinning yarn It is possible to express the bending property, by treating the ends of each of the protrusions to express the feel of the natural grass. In addition, since the protrusions are curved, they have excellent durability against frequent deformation. The circular arc consists of a circular arc having a radius of curvature R at a central point of an arbitrary position, and represents a central portion of the horizontal protrusion.

Release ES 100 according to the present invention can be formed by the following formula.

(1) 1 <L ₁ / B ₂ ≤ 5

(2) 2 ≤ L ₂ / B ₁ ≤ 6

(3) 30 ≤ Θ ≤ 70

(4) L ₁ : L ₂ = 1: 1.5-5

L ₁ : Length of the entire center projection between the upper middle projection and the lower middle projection

L ₂ : Length of the entire horizontal protrusion between the left and right horizontal protrusions

B ₁ : the thickness of the middle projection of each of the upper and lower sides

B ₂ : thickness of each horizontal protrusion on left and right sides

Θ: angle of inclination of the central projection (°)

When the L ₁ / B ₂ is less than the above range, when used as artificial turf, the overall physical properties such as tensile strength is lowered, the uprightness is not satisfactory, on the contrary, when the above range is exceeded, the spun yarn is not easily bent and stiff Become. In addition, when L ₂ / B ₁ is less than the above range, the rigidity of the yarn increases and becomes stiff, and when the above range is exceeded, there is a problem that the physical properties of the yarn are lowered and the uprightness and the rigidity are lowered. Then, if Θ is out of the above range, given an external force, it is not durable in the expression of uprightness and rigidity.

On the other hand, the spinning device 10 may further include other forms in addition to the release S-Za spinneret, Figure 3a is a cross-sectional view of the release cross spinneret according to an embodiment of the present invention. Referring to FIG. 3A, the unit spinneret cross-sectional shape further included in the radiator 10 is a release cross, and the release cross 200 includes a central protrusion 210 and a horizontal protrusion 230, having a length L ₃ and a thickness B ₃ . Horizontal projections 230 having a length L ₄ and a thickness B ₄ horizontally in the center of the central projection 210 are included. Here, L ₃ is shorter than L ₄ , B ₃ is larger than B ₄ , and the ends of each of the protrusions are rounded.

In the release cross 200, the central projection 210 is short and thick to strengthen the bending moment of the radiated yarn to maintain the upright state of the yarn, the horizontal projection 230 is long and thin to express the properties of the bent yarn is well bent It is to be made, by treating the end of each of the protrusions in a round to express the texture of the natural grass.

The release cross 200 according to the present invention may be formed as in the following formula.

(6) 1 <L ₃ / B ₄ ≤ 5

(7) 2 ≤ L ₄ / B ₃ ≤ 6

(8) L ₃ : L ₄ =: 1: 1.5-5

L ₃ : length of central projection

L ₄ : Length of horizontal protrusion

B ₃ : thickness of central projection

B ₄ : thickness of horizontal protrusion

When the L ₃ / B ₄ is less than the above range, problems in spinning workability occurs when used as artificial turf, the physical properties such as tensile strength is lowered, the uprightness is not satisfactory, on the contrary, if the above range is exceeded, Yarn hard to bend and stiff In addition, when L ₄ / B ₃ is less than the above range, the physical properties of the yarn is lowered, the uprightness and the rigidity is lowered, and when the above range is exceeded, there is a problem that the yarn is too rigid to be difficult to bend, stiffness .

As described above, the yarn manufactured by using the spinneret of the present invention has a similar feel to natural grass, and has a good bending property and a rigid property at the same time, thereby exhibiting an excellent elastic recovery rate, wear resistance, and pile uprightness.

In addition, when the yarn is manufactured by the spinneret of the present invention and the spinning apparatus including the same, the raw material is designed to smoothly discharge the raw material, thereby providing the radiation stability.

Through the following examples will be described in more detail.

Example  One

Artificial grass was manufactured from yarns manufactured according to the following conditions to evaluate various physical properties.

1. Yarn condition for artificial turf

(1) Conditions of the radiator

L ₁ / B ₂ = 1.94, L ₂ / B ₁ = 5.26, L ₁ : L ₂ = 1: 3.33, θ = 60 °, 64 heterozygous spinnerets designed with R = 3.30 for α = 5 °, β = A spinneret placed at 3 ° was used. The R is a radius of curvature at the center point of any position, the horizontal projection of the spinneret is made of an arc having the R, the circular arc represents the center of the horizontal projection.

(2) radiopolymer

The composition was prepared from 500 g of LLDPE with octene branches with a melt index of 1.8 to 2.0 and a density of 0.915 to 0.920, and 500 g of MDPE having a melt index of 0.5 to 0.6 and a density of 0.935 to 0.940.

 To the composition was added 7,000 ppm of UV stabilizer and 750 ppm of antioxidant.

(3) radiation conditions

The discharge amount was 712 g / min, the cooling temperature was 25 ° C, the drawing bath temperature was 83 ° C, the drawing ratio was 4.0, the first chamber temperature was 101 ° C, and the second chamber temperature was 82 ° C.

(4) yarn form

The yarn has a cross-sectional shape of a release S-shaped, a long axis length of 1 mm, a short axis was made up to 0.40 mm. Figure 2b is a SEM photograph of the release cross-shaped yarn according to an embodiment of the present invention.

2. Formation of artificial turf

Permeability characteristics 200 to 500 mono-denier yarn of polyamide and polyamide on the permeable ascon base layer in a 1: 1 alternating pile to the bubble layer 30 to 70 mm, the density of the pile 18 x 623 / horizontal m ² was tufted.

Example  2

Same as Example 1, but (1) under the conditions of the radiator, L ₃ / B ₄ = 3, L ₄ / B ₃ = 4, L ₃ : L ₄ = 1: 2.66 and the cross section shown in FIG. The spinneret was formed with 64 release cross spinnerets. (4) The yarn was made of cross-shaped cross section, 1 mm long axis and 0.47 mm short axis. Figure 3b is a SEM photograph of the release cross-shaped yarn according to an embodiment of the present invention.

Comparative example  One

As in Example 1, but (1) in the conditions of the spinning device, a spinneret having a cross section shown in Figure 4a was used, (4) the yarn shape is shown in Figure 4b.

Comparative example  2

Same as Example 1, but (1) under the conditions of the spinning device, a spinneret having a cross section shown in FIG. 5A was used, and (2) the yarn shape is shown in FIG. 5B.

Comparative example  3

Same as Example 1, but (1) in the conditions of the spinning device, a spinneret having a cross section shown in Fig. 6a was used, and (2) the yarn shape is shown in Fig. 6b.

Comparative example  4

Same as Example 1, but (1) under the conditions of the spinning device, a spinneret having a cross section shown in Figure 7a was used, (2) the yarn shape is shown in Figure 7b.

Comparative example  5

The same as in Example 1, but (1) in the conditions of the spinning device, a spinneret having a cross section shown in Figure 8a was used, (2) the yarn shape is shown in Figure 8b.

Comparative example  6

Same as Example 1, but (1) under the conditions of the spinning device, a spinneret having a cross section shown in Figure 9a was used, and (2) the yarn shape is shown in Figure 9b.

Comparative example  7

Same as Example 1, but (1) in the conditions of the spinning device, a spinneret having a cross section shown in Figure 10a was used, (2) the yarn shape is shown in Figure 10b.

Comparative example  8

As in Example 1, but (1) under the conditions of the spinning device, a spinneret having a cross section shown in Figure 11a was used, (2) the yarn shape is shown in Figure 11b.

Test Methods

1. Analysis of Shape of Yarn

Scanning Electron Microscope (SEM)

In order to check the shape and size of the yarn spun using a detention in the present invention, the sample was pretreated with a platinum-palladium coating and measured at high resolution 5 kv with HITACHI S4700 FE-SEM.

2. Radio workability

When the Full Bobbin ratio is greater than 95%,?, 90% to 95%, △, less than 90% is represented by ×.

3. Stress-strain measurement-KS K 0409

Measures the force (Stress or Static Force) to deform 10% yarn

4. Feel of yarn

The feeling of touching the hands of ten inspectors in textile research is evaluated as follows.

(Double-circle): Softness, (triangle | delta): Slightly soft, x: Stiffness.

division Radiation workability Stress at 10% strain (N) touch Example 1 ◎ 0.104 ◎ Example 2 ◎ 0.102 ◎ Comparative Example 1 ◎ 0.082 ◎ Comparative Example 2 ◎ 0.054 ◎ Comparative Example 3 ◎ 0.050 ◎ Comparative Example 4 ◎ 0.032 ◎ Comparative Example 5 ◎ 0.031 ◎ Comparative Example 6 ◎ 0.027 ◎ Comparative Example 7 ◎ 0.021 ◎ Comparative Example 8 ◎ 0.010 ◎

As a result of Table 1, most of the spinning workability and the touch is good, but it was confirmed that Examples 1 and 2 were excellent in stress and can exhibit an uprightness with a soft touch. A stress-strain measurement result graph of Table 1 is shown in FIG. 12. In the graph of FIG. 12, the larger the static force for deforming the yarn by 10%, the more rigid it may be an index indicating uprightness when applied to artificial turf. Accordingly, it was confirmed that even after 10% deformation of the yarns having the cross-shaped cross-shaped cross-shaped cross-shaped cross and the shape of the cross-shaped cross-shaped according to the present invention, the problem of securing uprightness, which was lacking in the existing artificial turf, was improved.

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 inventions. It will be clear to those who have knowledge of.

1 is a cross-sectional view of a radiating device according to a preferred embodiment of the present invention.

Figure 2a is a cross-sectional view of a release S yarn spinneret according to a preferred embodiment of the present invention.

Figure 2b is a SEM photograph of the release S yarn yarn in accordance with an embodiment of the present invention.

Figure 3a is a cross-sectional view of the release cross spinneret according to an embodiment of the present invention.

Figure 3b is a SEM photograph of the release cross yarn in accordance with an embodiment of the present invention.

4A to 11A are cross-sectional views of spinnerets according to comparative examples.

4b to 11b are SEM images of the yarn spun in the spinneret according to a comparative example.

12 is a graph of the stress-strain measurement results according to an embodiment of the present invention.

<Description of Major Symbols in Drawing>

10: spinning device

100: heteromorphic Sza, 111: upper middle protrusion, 113: lower middle protrusion,

131: left horizontal projection, 133: right horizontal projection

200: cross-shaped cross, 210: center protrusion, 230: horizontal protrusion

Claims (7)

In the release section spinneret for artificial grass, The shape of the cross-section of the spinneret is a heterogeneous S-shaped, consisting of an upper middle protrusion, a lower middle protrusion, a left horizontal protrusion, and a right horizontal protrusion, and the length L ₁ , upper side, and upper middle protrusion between the upper middle protrusion and the lower middle protrusion. The upper and lower middle protrusions having a thickness B ₁ of each of the lower middle protrusions are inclined in opposite directions, and the entire horizontal between the left horizontal protrusion and the right horizontal protrusion in the horizontal direction from the center between the upper middle protrusion and the lower middle protrusion. The length L ₂ of the protrusions, the horizontal protrusions B ₂ of each of the left and right horizontal protrusions are formed, and the left and right horizontal protrusions are formed to be alternately arced, the length L ₁ is shorter than L ₂ , B ₁ is B ₂ It is larger, and the end of each projection is a round section spinneret for artificial turf, characterized in that the rounded form. The method of claim 1, In the release S-za, the upper and lower middle protrusions are shorter and thicker than the left and right horizontal protrusions while being inclined at an angle of θ with respect to each horizontal protrusion so as to strengthen the bending moment of the radiated yarns so that the yarn is in an upright state. The left and right horizontal protrusions are formed to be longer and thinner than the upper and lower center protrusions with mutually intersecting arcs so that the radiated yarn can be well bent, and the ends of each protrusion are rounded. Release cross-section spinneret for artificial turf, characterized by satisfying the following condition formula (1) to (3). (1) 1 <L ₁ / B ₂ ≤ 5 (2) 2 ≤ L ₂ / B ₁ ≤ 6 (3) 30 ≤ Θ ≤ 70 L ₁ : Length of the entire center projection between the upper middle projection and the lower middle projection L ₂ : Length of the entire horizontal protrusion between the left and right horizontal protrusions B ₁ : the thickness of the middle projection of each of the upper and lower sides B ₂ : thickness of each horizontal protrusion on left and right sides Θ: angle of inclination of the central projection (°) The method of claim 2, A release section spinneret for artificial turf, characterized in that the ratio between the center projection and the horizontal projection length of the release S satisfies the following formula (5). (5) L ₁ : L ₂ = 1: 1.5-5 In the spinning device comprising a release cross-section spinneret for artificial grass, Claims 1 to 3 consisting of a plurality of spinnerets containing one or more release cross-section spinneret according to any one of claims, wherein each of the plurality of spinnerets constitute a sector in the circumferential direction, the angle between each sector or spinneret Is 1 to 10 °, wherein the spinnerets between or within each sector is configured to be the same or different from each other, characterized in that the dissimilar cross-section spinnerets for artificial turf, characterized in that configured. In the release section yarn for artificial turf, The cross-sectional shape of the yarn is a heteromorphic S-ja, consisting of an upper middle protrusion, a lower middle protrusion, a left horizontal protrusion and a right horizontal protrusion, and the length L ₁ of the entire center protrusion between the upper middle protrusion and the lower middle protrusion, respectively The upper and lower central projections having a thickness B ₁ of the central projection are inclined in opposite directions, and the length of the entire horizontal projection between the left horizontal projection and the right horizontal projection in the horizontal direction from the center between the upper central projection and the lower central projection. L ₂ , left and right horizontal projections each having a thickness B ₂ of the left and right horizontal projections, which are formed to cross each other in an arc, and include a length L ₁ is shorter than L ₂ , B ₁ is larger than B ₂ , Distal section yarn for artificial turf, characterized in that the end of each projection is rounded form. The method of claim 5, In the release S-za, the upper and lower middle protrusions are shorter and thicker than the left and right horizontal protrusions while being inclined at an angle of θ with respect to each horizontal protrusion so as to strengthen the bending moment of the radiated yarns so that the yarn is in an upright state. The left and right horizontal protrusions are formed to be longer and thinner than the upper and lower center protrusions with mutually intersecting arcs so that the radiated yarn can be well bent, and the ends of each protrusion are rounded. Release section yarn for artificial turf, characterized by satisfying the following condition formula (1) to (3). (1) 1 <L ₁ / B ₂ ≤ 5 (2) 2 ≤ L ₂ / B ₁ ≤ 6 (3) 30 ≤ Θ ≤ 70 L ₁ : Length of the entire center projection between the upper middle projection and the lower middle projection L ₂ : Length of the entire horizontal protrusion between the left and right horizontal protrusions B ₁ : the thickness of the middle projection of each of the upper and lower sides B ₂ : thickness of each horizontal protrusion on left and right sides Θ: angle of inclination of the central projection (°) The method of claim 6, Release section yarn for artificial turf, characterized in that the ratio of the center projection and the horizontal projection length of the release S satisfies the following formula (4). (4) L ₁ : L ₂ = 1: 1.5-5

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