KR101028575B1 - Spinneret for modified cross-section fiber and a method for preparing filament using the same - Google Patents

Abstract

The present invention relates to a spinneret for use with a cross section and a method for manufacturing a filament using the same, and more specifically, by using a modified spinneret of a modified form, high elastic recovery rate, abrasion resistance, pile uprightness, and soft touch are expressed. The present invention relates to a spinneret for use with a release cross section and a method for manufacturing a filament using the same.

Section, spinning, detention, filament

Description

Spinneret for modified cross-section and manufacturing method of filament using same {Spinneret for modified cross-section fiber and a method for preparing filament using the same}

1 is a cross-sectional view of the spinneret discharge hole according to an embodiment of the present invention.

Figure 2 is a perspective view of the spinneret discharge hole according to an embodiment of the present invention.

Figure 3 is a yarn form of the monofilament according to an embodiment of the present invention.

Figure 4 is a SEM photograph of the monofilament of the shape of the cross-sectional cross section according to the first embodiment of the present invention.

DESCRIPTION OF THE RELATED ART [0002]

110, 120: center projection, 210 to 240: side projection

310, 320: both ends, 400: perforation

The present invention relates to a spinneret for use with a cross section and a method for manufacturing a filament using the same, more specifically, by using a spinneret of a modified form, high elastic recovery rate, abrasion resistance, pile uprightness, and soft touch are expressed. The present invention relates to a spinneret for use with a release section applicable to a grass, and a method of manufacturing a filament using the same.

In general, there is a method of changing the raw material or the composition ratio of the raw material or releasing the cross section of the fiber as a method of improving the feel of the fiber or improving the physical properties.

Therefore, attempts have been made to produce fibers having the physical properties and properties required for use by varying spinnerets.

Artificial turf mitigates shock when applied to the field to resemble natural grass, has a soft touch and moisture content, has uprightness with proper orientation and proper toughness, and requires aesthetics with uniform color. need.

Accordingly, Korean Patent Registration No. 423482 releases the 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 by the 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 above C-shaped or U-shaped, the absorbency is enhanced, but there is a disadvantage that it is not appropriate for giving a soft touch.

In addition, the Republic of Korea Patent No. 659592 is a polyester cross-section yarn having a rhombic cross section of monofilament that can be applied to differentiated gloss, soft touch, excellent anti-reflective function, deep color pile and curtain applications and its manufacture The method has been proposed.

The rhombus shape has a disadvantage that the water content is relatively low, and the flexural elasticity recovery rate is low because the space between the filaments is less effective space to maintain moisture.

On the other hand, in the raw material composition for artificial turf, Japanese Patent Laid-Open No. 2007-016367 discloses an ethylene-α-olefin copolymer 5 having a density of 0.90 to 0.925 g / cm ³ by a high density polyethylene of 70 to 95% by weight and a metallocene catalyst. It was proposed pile yarn for artificial turf consisting of a composition with a 30 to 30% by weight.

HDPE has a toughness for the artificial turf pile yarn prepared above, and the ethylene-α-olefin copolymer having a density of 0.90 to 0.925 g / cm ³ by a metallocene catalyst exhibits soft characteristics.

However, although the above-mentioned HDPE is composed as a main component to increase the uprightness of the pile, it is insufficient to give a soft touch of natural grass.

In order to solve the above problems, an object of the present invention is to construct a filament using a spinneret having a shape of a release cross section, but the elastic recovery rate, pile uprightness and soft touch can be expressed and applied to artificial turf, etc. To provide a stability of the release cross-section using spinnerets and to provide a method for producing a filament using the same.

Another object of the present invention is to use a low-density polyethylene and a medium-density polyethylene as an artificial turf composition to provide high tensile strength and wear resistance, and to provide a spinneret for use with a sectional facet that exhibits a feel similar to that of natural grass and a method for producing a filament using the same. There is.

In order to achieve the above object, the present invention provides a spinneret for use with a sectional cross-section, wherein the cross-sectional shape of the spinneret discharge hole of the sectional cross-section yarn has a length L ₁ of a long axis, and the thickness gradually increases from both ends toward the center. It consists of a width D of the short axis of the detention, protruding to form a central projection with a length of L ₂ in the central portion, and maintains the interval B between the projections on both sides in the direction of the major axis of the central projection, shorter length than the central projection Phosphorus L ₃ to form a side projection symmetrically, to provide a spinneret using a sectional cross-section characterized in that the inner shape is perforated in the same shape of the spinneret.

The present invention, in the spinneret, the central projection and a pair of side projections and the length of the central projection L ₂ relatively to the side projection length longer than L ₃ warp of the spinneret otherwise a length that allows protrusion from the spinneret The moment is strengthened to maintain the upright state of spinnerets, and the side projections, which are relatively shorter than the central projections, are formed so that both sides have ductility to express soft properties and to maintain a minimum bending moment. Provided as a spinneret for use with a sectional side surface, characterized in that consisting of) to (3).

(1) 8.0 ≤ L ₁ / B ≤ 12.0

(2) 8.0 ≤ L ₁ / D ≤ 12.0

(3) L ₂ : L ₃ : D = 1: 0.55 ~ 0.95: 0.30 ~ 0.70

Here, the unit is mm, B: major axis projection interval

L ₁ : length of the major axis

L ₂ : Length of center period of detention shortening

L ₃ : Length of left and right side stones for shortening of detention

D: width of detention

In addition, the present invention includes a straight lower portion that is a vertical height of the spinneret, the height (H) of the straight bottom portion provides a spinneret for use with a sectional cross section, characterized in that consisting of the following formula (4).

(4) 1.5 ≤ H ≤ 5.5

In addition, the present invention is a method for producing a filament using a spinneret for use with a sectional cross-section, using the spinneret according to any one of claims 1 to 3, the discharge amount of the radiopolymer in the unit detention 1,000 to 2,000 spinning step of g / min; The spinning yarn is a stretching step in which the cooling temperature is 15 to 30 ° C., the stretching temperature is 70 to 100 ° C., and the stretching ratio is 3.0 to 5.0. The yarns that have undergone the stretching process are dried in two chambers having different temperatures. The temperature of one chamber is 80 to 110 ℃, the temperature of the second chamber provides a filament manufacturing method comprising the step of drying the temperature of 70 to 100 ℃.

The present invention also provides a method for producing a filament, characterized in that the spin polymer is a mixture of linear low density polyethylene and medium density polyethylene.

In addition, the present invention provides a filament manufacturing method characterized in that the ratio of the linear low density polyethylene and the medium density polyethylene is 60:40 to 40: 60% by weight.

In addition, the present invention, the linear low density polyethylene has a melt index of 1.8 to 2.0, the density is 0.915 to 0.920, the medium density polyethylene has a melt index of 0.5 to 0.6, the density is 0.935 to 0.940 characterized in that the filament manufacturing method To provide.

The present invention also provides a method for producing a filament, characterized in that at least one selected from pigments, UV stabilizers, antioxidants, absorbers or silicone additives is added to the radiation polymer.

In addition, the present invention provides a method for producing a filament, characterized in that the pigment is added 5 to 10 parts by weight based on 100 parts by weight of the spin polymer.

In addition, the present invention provides a filament manufacturing method characterized in that the UV stabilizer is added 5,000 to 10,000 ppm based on 1 kg of the radiation polymer.

In addition, the present invention provides a filament manufacturing method characterized in that the antioxidant is added to 500 to 1,000 ppm based on 1 kg of the spin polymer.

The present invention also provides a release section yarn produced by the above method.

In addition, in the present invention, the cross-sectional shape of the release cross-section yarn has a length L ₁ of the long axis, and the width D of the release cross-section yarn is shortened in a form in which the thickness is gradually thickened from both ends toward the center portion. To form a central projection protruding to have a length of L ₂ in the central portion, and maintains the distance B between the projections on both sides in the direction of the major axis of the central projection, the side projections are symmetrical with a shorter length L ₃ than the central projection It provides a release cross-section yarn, characterized in that formed.

In addition, the present invention, in the release cross-section yarns, the central projection and the pair of side projections are different lengths protruding from the release cross-section yarns so that the length L ₂ of the central projection relatively longer than the length of the side projection L ₃ spinneret By maintaining the bending moment of the spinneret to maintain the upright state of the spinneret, the side projections, which are relatively shorter than the central projection, are formed so that both sides have ductility to express soft properties and to maintain the minimum bending moment. It provides a release cross-sectional yarn characterized in that (1) to (3).

(1) 8.0 ≤ L ₁ / B ≤ 12.0

(2) 8.0 ≤ L ₁ / D ≤ 12.0

(3) L ₂ : L ₃ : D = 1: 0.55 ~ 0.95: 0.30 ~ 0.70

Here, the unit is mm, B: major axis projection interval

L ₁ : Length of the longitudinal section yarn

L ₂ : Length of center protrusion of short section yarn

L ₃ : Length of left and right side protrusions of short section yarn

D: width of short section yarn

In addition, the present invention by using the filament produced by the above method, 100 to 500 mono-denier yarn of the filament and the polyamide material on the permeable ascon base layer or the crushed ground on the basis of 1: 1 pile in the bubble layer To 30 to 70 mm by a tufting method, the density of the pile is provided by tufting 13,000 to 22,000 pieces / m ² total in the horizontal X length to provide an artificial turf.

Hereinafter, preferred 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.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values as are indicative of preparation and material tolerances inherent in the meanings mentioned, and are intended to be accurate or to facilitate understanding of the invention. Absolute figures are used to prevent unfair use by unscrupulous infringers.

1 is a cross-sectional view of the spinneret discharge hole according to an embodiment of the present invention.

The release cross-section yarn of the present invention is composed of a monofilament of thermoplastic resin, the cross-sectional shape of the spinneret discharge hole of the release cross-section yarn has a length L ₁ of the long axis, the thickness gradually toward the central portion at both ends (310,320) It is made of a thickness D of the shortening of the detention in the form of thickening, to form a central projection (110, 120) protruding to have a length of L ₂ in the center, and to maintain the interval B between the projections on both sides in the long axis direction of the central projection, Side projections 210, 220, 230, and 240 are formed symmetrically with L ₃ , which is shorter than the central projection, but has the same shape as the spinneret.

Here, the central projection and the pair of side projections have different lengths protruding from the spinneret, so that the length L ₂ of the central projection is relatively thicker than the length L ₃ of the side projection, thereby strengthening the bending moment of the spinneret so that the spinneret is upright. The side projections, which are relatively smaller than the central projections, allow both sides to be ductile, exhibiting soft properties and maintaining minimum bending moments.

Figure 2 is a perspective view of the spinneret discharge hole according to an embodiment of the present invention.

Based on the cross-sectional shape of FIG. 1, a straight bottom portion including a vertical height of the spinneret is included, and the shape of the whole mold can be designed including the height H directly below the spinneret.

The spinneret according to the present invention may be formed by the following formula.

(1) 8.0 ≤ L ₁ / B ≤ 12.0

(2) 8.0 ≤ L ₁ / D ≤ 12.0

(3) L ₂ : L ₃ : D = 1: 0.55 ~ 0.95: 0.30 ~ 0.70

(4) 1.5 ≤ H ≤ 5.5

Here, the unit is mm, B: major axis projection interval

L ₁ : length of the major axis

L ₂ : Length of center period of detention shortening

L ₃ : Length of left and right side stones for shortening of detention

D: width of detention

H: height directly under detention

If the ratio of the long axis (L ₁ ) and the projection interval (B) is less than the range, the soft touch is reduced, on the contrary, if the range is exceeded, there is a problem in spinning workability, such as tensile strength when used as artificial turf Physical properties are lowered. In addition, when the ratio of the major axis (L ₁ ) and the short axis width (D) is less than the above range, the size of the projections of the short axis is reduced, the elastic recovery and water content is lowered, the soft touch is reduced, when the above range is exceeded This results in less uprightness and stiffness.

In addition, when the ratio of the L ₂ , L ₃ and the D value is less than the above, there is a problem that the width of the yarn cross-section is lowered and the physical properties of the fiber are lowered. When the ratio is exceeded, the fineness is too high and the feel is stiff. There is a problem.

In addition, when the height (H) immediately below the detention is less than the above range, unfused parts may occur when the polymer spun from the lower part of the spinneret is fused. Therefore, excessive control of the radial viscosity and speed is required, and if it exceeds the above range, there is a disadvantage in that a satisfactory product in terms of stability of physical properties, coloration and soft touch cannot be obtained.

Therefore, in the sectioned yarn according to the present invention, the wear strength and the touch as well as the tensile strength and elongation are also important property evaluation factors.

Artificial turf, especially for hockey and soccer fields, is a single material of high density polyethylene (HDPE) or linear low density polyethylene (LLDPE) because the pile upright and the direction of the pile are very important factors. However, in the case of high density polyethylene, there are limitations in securing the uniform cloudiness of the ball and in preventing the scratches and burns when the player falls on the field.In the case of the linear low density polyethylene, the soft touch is expressed. The lower the tensile strength and the uprightness of the yarn, there is a disadvantage that the rebound elasticity is lowered.

Release cross-section yarn according to the present invention is to use the spinneret, to propose a filament made of a release cross-section yarn formed of a polyethylene-based composition. Among the polyethylene-based, especially branched polyethylene, low density, linear low density, medium density or high density polyethylene, or mixtures thereof are also possible. More preferably, it is a composition of linear low density polyethylene (LLDPE) and medium density polyethylene (MDPE).

Therefore, LLDPE shows the soft emotional properties of the grass, and MDPE can supplement the appearance and physical properties of the grass can be produced artificial turf similar to natural grass.

In addition, unlike the HDPE synthesized with the Ziegler-Natta catalyst, MDPE is synthesized with a metallocene catalyst and has a similar strength to that of the HDPE, but has a feature of showing wear resistance.

The LLDPE and MDPE is preferably composed of 45 to 55% by weight, respectively.

In addition, the LLDPE is a hexyl branched LLDPE having a melt index of 1.8 to 2.0, the density is 0.915 to 0.920, MDPE is preferably a melt index of 0.5 to 0.6, the density is 0.935 to 0.940.

Outside the above range, the touch or physical properties are not satisfactory in the use of artificial turf.

In addition to the raw material, one or more selected from pigments, absorbers, UV stabilizers, antioxidants or silicone additives may be added.

The pigment is preferably added 5 to 10 parts by weight based on 100 parts by weight of the composition for imparting color, such as natural grass.

The UV stabilizer serves as a weather resistant reinforcement to prevent the production of amine, which is a yarn decomposition promoting material during ultraviolet irradiation, 5,000 to 10,000 ppm is preferably added based on 1 kg of the composition of the designed ratio.

In addition, the antioxidant prevents the yarn from being embrittled by heat to improve the heat resistance, it is preferably added to 500 to 1,000 ppm based on 1 kg of the composition.

In addition, the silicone resin may be added to improve the processability of the extrusion or injection process and the soft touch of the yarn after the raw material composition.

When it is out of the range added to the raw material for artificial turf, it is greatly deviated from the characteristics required for grass not only in excellent durability and tear strength and toughness but also soft touch.

Therefore, the inclusion in the composition ratio is an optimal condition to have properties similar to natural grass.

On the other hand, the method for producing a filament using a spinneret using a release cross section may proceed to the spinning step, stretching step, drying step.

First, in the spinning step, the discharge amount of the radiopolymer in the unit of confinement is preferably 1,000 to 2,000 g / min. If it is less than the above range, the radioactivity is poor and there is a risk of trimming, and if it exceeds the above range, the shape stability of the discharged filament is exceeded. There is a problem of this deterioration.

The spun yarn may be drawn at a drawing ratio of 3.0 to 5.0 at a cooling temperature of 15 to 30 ° C and a drawing temperature of 70 to 100 ° C.

If the cooling temperature is less than 15, there is a problem that the physical properties of the fiber is lowered due to the quenching phenomenon, and when the cooling temperature is higher than 30 ℃, the shape stability of the mold release section is lowered. In addition, when the stretching temperature is less than 70 ℃, when the drawability is poor and exceeds 100 ℃ there is also a problem that the morphological stability of the release cross-section is lowered.

If the draw ratio is less than 3.0, the dimensional stability is lowered, and if it exceeds 5.0, the drawability is not only deteriorated but also the stiffness of the touch is not preferable.

The yarns subjected to the stretching process are dried in two chambers having different temperatures, and thus, the first chamber temperature is 80 to 110 ° C., and the second chamber temperature is 70 to 100 ° C., and the drying step may be performed. .

When it is less than the said drying temperature range, said draw ratio is not maintained, and when it exceeds the temperature range, there exists a possibility that a touch may become rough.

The artificial turf is formed as follows using the filament prepared above.

First, 100 to 500 mono-denier yarns of the filament and the polyamide material are alternately formed in a bubble layer on a bubble layer of 30 to 70 mm on a permeable ascon base layer or crushed ground. The pad layer may be formed on the ascon base layer or the crushed stone.

The pile has a density of 13,000 to 22,000 pieces / m ² in total length and width to complete the artificial turf.

If the pile density is out of the above range, the expression of elastic recovery property is not satisfactory, so it is not suitable for application to stadium turf.

Example  One

Artificial grass was prepared as a filament prepared according to the following conditions to evaluate the overall physical properties.

1. Filament Condition

(1) spinneret

L ₁ / B = 10, L ₁ / D = 10, L ₂ : L ₃ : D = 1: 0.75: 0.50, H: 3.5 mm single-sided spinneret

(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

Discharge amount: 712 g / min, Cooling temperature: 25 ° C, Stretch bath temperature: 83 ° C, Draw ratio: 4.0, First chamber temperature: 101 ° C, Second chamber temperature: 82 ° C,

(4) filament yarn form

3 is a yarn form of a monofilament according to an embodiment of the present invention.

The length of the long axis of the monofilament is 1 mm, the short axis is up to 320 ㎛, the number of twists 35 to 45 twist / inch was prepared in the form of a long axis arranged in the long axis direction.

2. Artificial turf conditions

Permeability characteristics 200 to 500 mono-denier yarn of the filament and polyamide material is formed on the bubble layer by a tufting method of 30 to 70 mm in the bubble layer on the top of the ascon base layer, the density of the pile is the density of the pile Was tufted 18,623 pieces / m ² in total length and width.

Example  2

As in Example 1, a composition of 800 g of LLDPE and 200 g of MDPE was prepared using the radiopolymer.

Example  3

In the same manner as in Example 1, but prepared a composition of 700 g LLDPE, 300 g MDPE with the radiopolymer.

Example  4

In the same manner as in Example 1, 200 g of LLDPE and 800 g of MDPE were prepared using the radiopolymer.

Example  5

In the same manner as in Example 1, 300 g of LLDPE and 700 g of MDPE were prepared using the radiopolymer.

Comparative example  One

In the same manner as in Example 1, butenyl LLDPE 1,000 g of butene was used as the radiopolymer, and 2,000 ppm of an absorbent, 6,000 ppm of an ultraviolet stabilizer, and 750 ppm of an antioxidant were added to the LLDPE as an additive.

Comparative example  2

Same as Comparative Example 1, but did not add an antioxidant as the additive.

Comparative example  3

As in Comparative Example 1, only 8,000 ppm of an ultraviolet stabilizer was added to the LLDPE.

Comparative example  4

As in Comparative Example 1, 2,000 ppm of an absorbent and 6,000 ppm of an antioxidant were added as the additive.

Comparative example  5

In the same manner as in Comparative Example 1, 2,000 ppm of an absorbent, 3,000 ppm of an ultraviolet stabilizer, and 2,000 ppm of an antioxidant were added as the additive.

Comparative example  6

As in Example 1, 1,000 g of MDPE was used as the radiopolymer.

Comparative example  7

As in Comparative Example 5, 1,000 g of HDPE was used as the radiopolymer.

Test Methods

1. Morphological Analysis of Deformed Cross Section Filament

Scanning Electron Microscope (SEM)

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

In addition, the analysis mode was measured at 15 kv with a HORIBA EX-250 Energy Dispersive X-ray microanalysis (EDX) mounted on the apparatus for component analysis and trace mineral component detection.

Figure 4 is a SEM photograph of the monofilament of the shape of the cross-section cross section according to a preferred embodiment of the present invention.

In the spinneret of the present invention, the shape of the monofilament discharged under the spinning condition was maintained in form stability similar to that of the cross section of the spinneret, and the spinning workability was excellent.

In addition, the EDX results of the composition according to Example 1 of the present invention are as follows.

TABLE 1

element weight (%) C 98.11 Pb 1.89 all 100.00

As a result of the above results, the composition is mostly composed of carbon (C), which is an element of polyethylene, and is composed of lead (Pb) of about 1.89%.

In the artificial turf composition, the heavy metal content of 3% or less is good for showing the turf effect, and the content shows satisfactory conditions in the artificial turf composition.

2. Radio workability

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

3. Denier, tensile strength, elongation: KS K 0409

4. Weather resistance

Tensile strength and elongation were measured every 300/500/700 / 1,000 hours in filament after spinning at a dose of 0.55 W / M (total number of piles) at 89 ° C X 50 RH under Xenon-Weather O-Meter.

 5. Wear resistance

Collect at least three round specimens of approximately 130 mm in diameter, drill a 6 mm diameter hole in the center and place them on the sample holder with the specimen surface facing upward in the abrasion strength tester. Using the H-38 wheels, rotate and rub about 3,000 times at 70 rpm against the direction of rotation of the specimen.

Weight reduction measures the friction loss and displays the average of up to three significant figures.

% Wear = {(weight before test (g)-weight after test (g)) / weight before test (g)} X 100

6. Feel of filament

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.

[Table 2]

In view of the above results, Example 1 exhibited the optimum properties of appropriate strength and touch in spinning workability, wear rate and feel.

As described above, the cross-section of the fiber is released by using the spinneret according to the embodiment of the present invention, and thus, the characteristics of the artificial fiber lacking the touch can be expressed close to the natural fiber.

In addition, the release cross-section filament can be applied to artificial turf, such as elastic recovery rate, abrasion resistance, pile upright and soft touch, and also has the effect of providing stability of spinning.

In addition, by using a linear low density polyethylene and a medium density polyethylene in a pre-designed composition, it exhibits high tensile strength and abrasion resistance as well as weather resistance, and has a similar effect to natural grass.

In addition, by adjusting the ratio of the filament composition, there is an effect that can be used in various applications by using not only the artificial turf but also other forms to use the properties represented by the composition of the present invention.

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.

Claims (15)

In the spinneret for use with a cross section, Cross-sectional shape of the modified cross-section's spinneret discharge holes were has a length L ₁ of the long axis, as the direction to the center from the both end portions is made of a width D of the detention speed in the form that the thickness is gradually thickened with, the central projection L ₂ in the central portion It is formed to protrude to have a length of, and in the long axis direction of the central projection to maintain a mutually spaced interval B between the projections, to form a lateral projection symmetrically with a shorter length L ₃ than the central projection, the same of the spinneret The shape is perforated inside, The central projection and the pair of side projections have different lengths protruding from the spinneret so that the length L ₂ of the central projection is relatively longer than the length L ₃ of the side projection to strengthen the bending moment of the spinneret, thereby improving the upright state of the spinneret. The side projections, which are relatively shorter than the central projections, are formed so that both sides have ductility to express a soft property and maintain a minimum bending moment, and are characterized by the following formulas (1) to (3): Spinnerets for use with modified sections. (1) 8.0 ≤ L ₁ / B ≤ 12.0 (2) 8.0 ≤ L ₁ / D ≤ 12.0 (3) L ₂ : L ₃ : D = 1: 0.55 ~ 0.95: 0.30 ~ 0.70 Here, the unit is mm, B: major axis projection interval L ₁ : length of the major axis L ₂ : Length of center period of detention shortening L ₃ : Length of left and right side stones for shortening of detention D: width of detention delete The method of claim 1, The straight bottom portion of the spinneret is a vertical height is included, and the height (H) of the straight bottom portion is a release cross-section using spinnerets, characterized in that consisting of the following formula (4). (4) 1.5 ≤ H ≤ 5.5 H: height directly under detention (mm) In the manufacturing method of the filament using a spinneret for use with a cross-section, Using the spinneret according to claim 1, Spinning step of the discharge amount of the spin polymer in the spinneret 1,000 to 2,000 g / min; The spinning yarn has a stretching step of proceeding with a stretching ratio of 3.0 to 5.0 at a cooling temperature of 15 to 30 ° C. and a stretching temperature of 70 to 100 ° C .; The yarns subjected to the stretching process are dried in two chambers having different temperatures, so that the temperature of the first chamber is 80 to 110 ° C., and the temperature of the second chamber is 70 to 100 ° C. Filament manufacturing method. The method of claim 4, wherein The radiopolymer is a filament manufacturing method, characterized in that the mixture of linear low density polyethylene and medium density polyethylene. The method of claim 5, Filament manufacturing method characterized in that the ratio of the linear low density polyethylene and medium density polyethylene is 60:40 to 40: 60% by weight. The method of claim 5, The linear low density polyethylene has a melt index of 1.8 to 2.0, a density of 0.915 to 0.920, the medium density polyethylene has a melt index of 0.5 to 0.6, the density is 0.935 to 0.940 characterized in that the filament. The method of claim 5, A method for producing a filament, characterized in that at least one selected from pigments, ultraviolet stabilizers, antioxidants, absorbers or silicone additives is added to the radiopolymer. The method of claim 8, The pigment is a filament manufacturing method, characterized in that 5 to 10 parts by weight based on 100 parts by weight of the spin polymer. The method of claim 8, The UV stabilizer is a filament manufacturing method, characterized in that 5,000 to 10,000 ppm is added based on 1 kg of the radiation polymer. The method of claim 8, The antioxidant is a filament manufacturing method, characterized in that 500 to 1,000 ppm is added based on 1 kg of the radiopolymer. Molded section yarn produced by the method according to any one of claims 4 to 11. In shaped section yarns, Was cross-section's modified cross-section has the length L ₁ of the long axis, as the direction to the center from the both end portions is made of a form that the thickness is gradually thickened to a width D of the modified cross-section yarn speed, the length L ₂ the central projection on the central portion It is formed so as to protrude, and maintains the interval B between the protrusions on both sides in the direction of the long axis of the central projection, the side projections are formed symmetrically with a shorter length L ₃ than the central projection, In the release cross-section yarn, the center projection and the pair of side projections have different lengths protruding from the release cross-section yarns so that the length L ₂ of the central projection is relatively longer than the length L ₃ of the side projection to reinforce the bending moment of the spinneret. It is possible to maintain the upright state of the spinneret, and the side projections, which are relatively shorter than the central projections, are formed so that both sides have ductility to express a soft property and to maintain a minimum bending moment, and the following equations (1) to ( 3) a cross-section yarn, characterized in that consisting of. (1) 8.0 ≤ L ₁ / B ≤ 12.0 (2) 8.0 ≤ L ₁ / D ≤ 12.0 (3) L ₂ : L ₃ : D = 1: 0.55 ~ 0.95: 0.30 ~ 0.70 Here, the unit is mm, B: major axis projection interval L ₁ : Length of the longitudinal section yarn L ₂ : Length of center protrusion of short section yarn L ₃ : Length of left and right side protrusions of short section yarn D: width of short section yarn delete Using a filament produced by the method according to any one of claims 4 to 11, 100 to 500 mono-denier yarn of the filament and polyamide material 1: 1 on the permeable ascon base layer or crushed ground Alternately forming a pile in the bubble layer by a 30 to 70 mm tufting method, the density of the pile is characterized in that formed by tufting a total of 13,000 to 22,000 pieces / m ² in width X length.

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