Manufacturing apparatus for double-sided yarn for artificial turf and double-sided yarn for artificial turf manufactured therefrom

Abstract

A manufacturing apparatus for double-sided yarn for artificial turf is provided. In one embodiment, the apparatus may include a first liquid supply pipe to which molten first liquid is supplied, a second liquid supply pipe arranged in a space physically separated from the first liquid supply pipe to which molten second liquid is supplied, and a junction where the first liquid that flowed in through the first liquid supply pipe and the second liquid that flowed in through the second liquid supply pipe merge.

Description

Technical Field

[0001] The present invention relates to an apparatus for manufacturing a double-sided yarn for artificial turf and a double-sided yarn for artificial turf manufactured thereby.

Background Art

[0002] An artificial turf system includes an artificial turf pad, a shock-absorbing pad that supports the artificial turf pad, and a filler laid on the artificial turf pad in order to exhibit the effects of natural turf.

[0003] Since artificial turf was first manufactured in the United States to compensate for various drawbacks of natural turf, it has mainly been used in sports fields for ball games such as baseball fields, soccer fields, or golf courses.

[0004] Artificial turf has the characteristic of always maintaining a blue color regardless of the season and is not restricted by environmental conditions such as climate, and because its construction and management are easy, it is being used more and more.

[0005] Although artificial turf requires more initial construction costs than natural turf, it is highly favored for its semi-permanent use, convenient maintenance, and ability to always maintain an even surface suitable for sports.

[0006] Artificial turf is artificially manufactured in the form of turf using synthetic fiber materials, and is formed by driving yarns formed in the shape of turf into a foamed cushioning material serving as a base. In order to prevent the yarns in the shape of turf from separating from the foamed cushioning material, a coating agent containing an adhesive component is applied to the lower surface of the foamed cushioning material.

[0007] In recent years, artificial turf has been researched and developed so that it can be used for a long time while having a similar feel to natural turf.

[0008] However, while nylon was primarily used as the raw material for early artificial turf, nylon yarn, although strong and abrasion-resistant, had high surface friction, posing a risk of joint injuries and burns when it rubbed against the body.

[0009] Attempts have been made to overcome these problems by modifying the yarn composition, changing the molding method, and developing yarn manufacturing equipment, but it has been difficult to achieve physical properties and appearance similar to natural grass.

[0010] Specifically, conventionally developed manufacturing equipment for artificial turf yarns has either been difficult to equip with the facilities necessary to produce yarns with two or more properties in order to achieve the same physical properties and appearance as natural grass, or the yarns have been designed in such a way that they can only exhibit two or more properties after manufacturing is complete. Alternatively, a structure has been applied in which yarns are formed from two or more raw materials, and the raw materials for two or more yarns are poured into spatially separated molds and then attached using separate tubes, resulting in a difficult structure in which the bonding of the two or more raw materials is not sufficient. [Overview of the project] [Problems that the invention aims to solve]

[0011] The present invention aims to solve the above-mentioned problems and provide a manufacturing apparatus for double-sided yarn for artificial turf having physical properties and appearance similar to natural grass, and double-sided yarn for artificial turf manufactured thereby. The apparatus utilizes the fluid flow of the raw material to continuously produce two or more raw materials in one yarn, and aims to produce double-sided yarn for artificial turf with improved bonding properties between the two or more raw materials. [Means for solving the problem]

[0012] To solve the above-mentioned problems, the present invention provides a manufacturing apparatus for double-sided yarn for artificial turf, comprising: a first liquid supply pipe to which molten first liquid is supplied; a second liquid supply pipe spatially separated from the first liquid supply pipe to which molten second liquid is supplied; and a confluence section where the first liquid flowing in through the first liquid supply pipe and the second liquid flowing in through the second liquid supply pipe merge.

[0013] Furthermore, the present invention provides a double-sided yarn for artificial turf, manufactured by the above-described double-sided yarn manufacturing apparatus for artificial turf, comprising a first surface formed by the first liquid and a second surface formed by the second liquid, and comprising any of the following: the first surface and the second surface having different hues; the first surface and the second surface having different glosses; the first surface and the second surface having different roughnesses; the first surface and the second surface having different curvatures depending on the intensity, wavelength, or temperature changes of the irradiated light; and combinations thereof. [Effects of the Invention]

[0014] According to one embodiment of the present invention, process efficiency can be improved by utilizing the fluid flow of the raw material to continuously produce two or more raw materials in a single double-sided yarn.

[0015] Furthermore, the present invention can improve the reliability of the quality of double-sided yarn manufactured by providing a confluence section at the top of the slitting mold section so that the hydraulic pressure and flow rate of the raw liquid cancel each other out.

[0016] Furthermore, the present invention enables the production of double-sided yarn having physical properties and appearance similar to natural grass by causing the first liquid and the second liquid to come into contact and be extruded in the slitting mold section, thereby achieving natural curl and color. [Brief explanation of the drawing]

[0017] [Figure 1] This figure shows a manufacturing system for double-sided yarn for artificial turf according to one embodiment of the present invention. [Figure 2-5]This diagram shows a manufacturing apparatus for double-sided yarn for artificial turf. Figure 3 shows the flow direction of the first and second liquids in Figure 2, Figure 4 shows a detailed view of the configuration where the first and second liquids merge, and Figure 5 shows a cross-sectional view of the x and z axes at position AA in Figure 4 to show a detailed view of the configuration where the first and second liquids merge. [Figure 6-9] This figure shows the configuration of the slitting mold section according to each embodiment. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described in detail below. However, the present invention is not limited to the embodiments disclosed below and can be realized in various forms, and these embodiments are provided merely to complete the disclosure of the present invention and to make the contents of the invention more fully known to those who are ordinary skilled.

[0019] On the other hand, the double-sided filaments described in this invention can be those with a monofilament count of 150 denier to 2500 denier.

[0020] On the other hand, the monofilament referred to in the present invention may refer to a double-sided filament, and as an example, it may refer to a double-sided filament formed by the contact of the first liquid and the second liquid.

[0021] The following will provide a detailed explanation with reference to the drawings.

[0022] The applicant of the present invention has designed and changed the applicant holding device in various ways and conducted various trials and errors in order to make the double-sided raw yarn for artificial turf exhibit two or more physical properties and manufacture a double-sided raw yarn for artificial turf having the same physical properties and appearance as natural turf, and has thus arrived at the present invention. Specifically, in the present invention, the applicant physically separates the first liquid and the second liquid, which are raw materials flowing through different paths, and allows them to merge at the merging section while canceling out the hydraulic pressure difference and the flow velocity difference, and then allows the first liquid and the second liquid to come into contact with each other and flow into the slit die section that extrudes the double-sided raw yarn. As a result, the applicant of the present invention has developed a manufacturing apparatus for a double-sided raw yarn for artificial turf that can manufacture a double-sided raw yarn for artificial turf having the same physical properties and appearance as natural turf while achieving a continuous double-sided raw yarn forming process by allowing the first liquid and the second liquid to flow continuously.

[0023] FIG. 1 is a diagram showing a manufacturing system for a double-sided raw yarn for artificial turf according to an embodiment of the present invention.

[0024] Referring to FIG. 1, the manufacturing system for a double-sided raw yarn for artificial turf may include a supply unit 10, a forming unit 20, and a molding unit 30.

[0025] The supply unit 10 is for supplying the molten stock solution to the forming unit, and can supply a molten stock solution of various known materials.

[0026] For example, as the raw material of the stock solution, synthetic resins such as polypropylene, polyethylene, and nylon, dyes for color expression, ultraviolet stabilizers, antioxidants, and antistatic agents for preventing the generation of static electricity can be mentioned.

[0027] For example, the stock solution can include one or more of the above-mentioned raw materials in a molten state.

[0028] For example, two or more stock solutions may be supplied, and at least one or more different raw materials may be included.

[0029] The forming unit 20 is for forming double-sided yarn for artificial turf from the raw liquid, and the manufacturing apparatus 100 for double-sided yarn for artificial turf, which will be described later, can be applied with reference to Figures 2 to 7.

[0030] The molding section 30 is for molding the double-sided yarn formed in the molding section 20 according to its intended use, and may include yarn stretching, cooling, and tufting. The procedures, equipment, and manufacturing conditions applied at each stage may be modified according to the intended use.

[0031] Figures 2 to 5 show the manufacturing apparatus for double-sided yarn for artificial turf. Figure 3 shows the flow direction of the first and second liquids in Figure 2. Figure 4 shows in detail the configuration where the first and second liquids merge. Figure 5 shows the xz axis cross-section at position AA in Figure 4 in order to show in detail the configuration where the first and second liquids merge.

[0032] Referring to Figures 2 and 3, the raw liquid is supplied to the artificial turf double-sided yarn manufacturing apparatus 100, and after the artificial turf double-sided yarn is formed, it can be discharged to the molding section 30 described above. In Figure 3, the solid arrows indicate the flow of the first liquid L1, and the dotted arrows indicate the flow of the second liquid L2.

[0033] The manufacturing apparatus 100 for double-sided yarn for artificial turf includes a first liquid supply pipe 1 to which molten first liquid is supplied, a second liquid supply pipe 2 spatially separated from the first liquid supply pipe 1 to which molten second liquid is supplied, and a confluence section 140 to which the first liquid that flows in via the first liquid supply pipe 1 and the second liquid that flows in via the second liquid supply pipe merge.

[0034] In this case, the first and second liquids may be melted from the same material, or they may be melted from different materials. Furthermore, the first and second liquids may be melted from the same synthetic resin, but they may be made from materials containing different additives, such as dyes and antistatic agents, to exhibit different physical properties.

[0035] A first pressure control unit 110 may be provided at one end of the first liquid supply pipe 1.

[0036] The first pressure control unit 110 can control the hydraulic pressure of the first liquid flowing in through the first liquid supply pipe 1 according to preset conditions. This allows for the temporary control of the fluidity so that the second liquid merging at the confluence section 140 flows continuously with a uniform flow velocity and hydraulic pressure, thereby improving the reliability of the quality.

[0037] The first pressure control unit 110 may be connected to the first liquid discharge pipe 111.

[0038] The first liquid discharge pipe 111 can through which the first liquid, whose fluidity is primarily controlled, flows. For example, a height difference may be provided at both ends so that the weight of the first liquid is added to the flow velocity controlled by the first pressure control unit 110. As an example, the first liquid discharge pipe 111 can extend vertically.

[0039] A second pressure control unit 112 may be provided at one end of the first liquid discharge pipe 111.

[0040] The second pressure control unit 112 can control the hydraulic pressure of the first liquid according to preset conditions. This allows for secondary control of the fluidity so that the first and second liquids, which merge at the confluence 140, flow continuously at a uniform speed and pressure, thereby improving the reliability of the quality. For example, the second liquid can flow by gravity, and the first pressure control unit 110 and the second pressure control unit 112 can be applied to control the hydraulic pressure and flow rate of the first liquid in accordance with the hydraulic pressure and flow rate of the second liquid.

[0041] The second pressure control unit 112 may be connected to the first liquid chamber 120.

[0042] A junction 140 is provided at one end of the first liquid chamber 120 for the confluence of the first liquid and the second liquid. At this time, the first liquid chamber 120 is configured such that the first liquid, which has passed through the first liquid chamber passage 121 that penetrates the first liquid chamber 120, and the second liquid, which flows in spatially separated from the flow path of the first liquid, can be stably combined at the junction 140.

[0043] A slit mold section 150 is provided at the lower end of the confluence section 140.

[0044] The slitting die section 150 is for forming the double-sided yarn for artificial turf to be manufactured in a predetermined shape, and an extrusion die is applied to it.

[0045] The present invention is characterized in that a first liquid and a second liquid flow continuously in contact with each other within the space defined by the slit mold section 150. That is, the first liquid and the second liquid flow continuously into the slit mold section 150, and a double-sided yarn is formed in a manner in which they contact each other within the slit mold section 150. This improves the bonding strength between the first liquid and the second liquid. Furthermore, since a double-sided yarn can be formed in which the first liquid and the second liquid contact each other within the slit mold section 150, the present invention allows for easy control of the content of the first liquid and the second liquid constituting the double-sided yarn.

[0046] On the other hand, the structure in which the first liquid and the second liquid merge will be described in detail with reference to Figure 4, and the merging section 140 and the slit mold section 150 will be described in detail with reference to Figures 6 to 8.

[0047] A second liquid chamber 130 may be provided at one end of the second liquid supply pipe 2.

[0048] The second liquid chamber 130 has a predetermined hydraulic pressure through the second liquid supply pipe 2 and has a predetermined volume to store and / or pass through the incoming second liquid.

[0049] For example, the second liquid chamber 130 may have a shape that gradually widens downward in the region connected to one end of the second liquid supply pipe 2, for example, a tapered shape in which the cross-sectional area gradually widens downward, and a shape that gradually narrows downward again at a predetermined position, for example, a tapered shape in which the cross-sectional area gradually narrows downward.

[0050] For example, a hydraulic pressure gauge can be installed in the second liquid chamber 130 to measure the hydraulic pressure of the second liquid.

[0051] A second liquid chamber discharge pipe 131 may be connected to one end of the second liquid chamber 130.

[0052] For example, the second liquid may flow along the second liquid chamber discharge pipe 131 by gravity.

[0053] Multiple second liquid separation and discharge pipes 132 may be connected to one end of the second liquid chamber discharge pipe 131.

[0054] The second liquid separation and discharge pipe 132 is provided to separate and discharge the second liquid into multiple confluence sections 140 before the second liquid flows into the confluence section 140.

[0055] For example, the second liquid separation and discharge pipe 132 may have a structure consisting of a single space formed by a continuous 360° of pipes extending at a predetermined angle. As an example, both the outer and inner sides of the second liquid separation and discharge pipe 132 may have a tapered shape such that the width of the xz axis cross-section increases as it extends downward.

[0056] For example, multiple second liquid separation and discharge pipes 132 may be provided, spaced apart from each other.

[0057] A second liquid confluence pipe 133 may be connected to one end of the second liquid separation and discharge pipe 132.

[0058] The second liquid confluence pipe 133 can refer to the region in which the second liquid discharged from the second liquid separation and discharge pipe 132 flows through the lower part of the first liquid chamber 120.

[0059] The second liquid confluence pipe 133 may have a structure that extends horizontally for a predetermined length away from the second liquid separation and discharge pipe 132, so that the second liquid can move horizontally by a predetermined distance. This makes it easy to control the flow velocity of the second liquid that flows in through the second liquid separation and discharge pipe 132 by gravity.

[0060] One end of the second liquid confluence pipe 133 is connected to a confluence section 140 located at the top of the slit mold section 150.

[0061] The first and second liquids, as described above, flow into the confluence section 140 so as to come into contact at the same height, and then, while in contact with each other in the slit mold section 150, they flow continuously along the yarn forming tube 160, extruding and forming yarn on both sides.

[0062] Referring to Figure 4, the first liquid and the second liquid merge at the merging section 140.

[0063] For example, the first liquid and the second liquid can come into contact at the confluence section 140. That is, the present invention is characterized in that double-sided yarn is continuously produced in a state where the first liquid and the second liquid come into contact at the slit die section 150. However, if the first liquid and the second liquid, which flow in from different directions, immediately merge at the slit die section 150, it becomes difficult to control the continuously flowing first liquid and second liquid so that they have a uniform thickness within the slit die section 150. Therefore, the present invention provides a confluence section 140 at a position where the continuously flowing first liquid and the second liquid come into contact, so that the hydraulic pressure of each fluid cancels out, thereby maintaining the continuity of the process, increasing process efficiency, improving the bonding force of the first liquid and the second liquid, and improving the reliability of the manufactured double-sided yarn quality.

[0064] For example, the confluence section 140 can have a structure that extends from the end of the first liquid chamber passage pipe 121 in a direction away from the second liquid confluence pipe 133. Such a structure can reflect the phenomenon in which the first liquid, which flows into the confluence section 140 by a pre-controlled pressure and its own weight, is pushed out by a predetermined distance by the hydraulic pressure of the second liquid that flows in along the second liquid confluence pipe 133. As a result, the difference in hydraulic pressure and flow velocity between the first and second liquids is canceled out at the upper part of the slit mold section 150, i.e., the confluence section 140, so that the first and second liquids can stably flow into the slit mold section 150 and be extruded as double-sided yarn.

[0065] On the other hand, the present invention allows for controlling the content ratio of the first and second liquids that constitute the double-sided filaments in order to achieve physical properties and appearance similar to natural grass.

[0066] For example, by controlling the hydraulic pressure of the first liquid and the second liquid flowing into the confluence section 140 to be equal, the first and second liquids can be extruded downwards, each occupying an equal thickness with respect to the center line of the slit mold section 150.

[0067] For example, by controlling the hydraulic pressure of the first liquid flowing into the confluence section 140 to be higher than that of the second liquid, or by controlling the hydraulic pressure of the second liquid to be higher than that of the first liquid, it is possible to manufacture double-sided yarn having physical properties and appearance similar to natural grass.

[0068] For example, to achieve a natural curl or color similar to natural grass, one of the following materials can be used as the first and second liquids: polypropylene, polyamide, polyethylene, nylon, polyvinyl chloride, polyurethane, or a combination thereof.

[0069] As a specific example, by applying the artificial turf yarn manufacturing apparatus 100 of the present invention, it is possible to manufacture yarn in which one side exhibits a rough texture and the other side exhibits a soft texture.

[0070] As a specific example, by applying the artificial turf double-sided yarn manufacturing apparatus 100 of the present invention, a first liquid and a second liquid with different thermal expansion characteristics can be applied, and the curl can be changed according to the ambient temperature conditions. In addition, different color appearances can be applied with the first liquid and the second liquid, and by changing the curl according to the amount of sunlight, the duration of sunlight, and the ambient temperature conditions, it is possible to manufacture double-sided yarn that exhibits different color appearances.

[0071] Figure 5 shows the configuration where the first and second liquids merge, as a cross-section along the x and z axes at position AA in Figure 4.

[0072] The confluence section 140 may include a first liquid confluence section 141 and a second liquid confluence section 142. The first liquid confluence section 141 refers to the region into which the first liquid, having passed through the first liquid chamber passage 121 in Figure 4, flows in, and the second liquid confluence section 142 refers to the region into which the second liquid, discharged from the lower end of the second liquid separation discharge pipe 132, flows in along the second liquid confluence pipe 133 and then flows into the confluence section 140.

[0073] As shown in Figure 5, a plurality of junction sections 140 and a plurality of slit mold sections 150 are provided, and each junction section 140 may be provided with a plurality of first liquid junction sections 141 and a plurality of second liquid junction sections 142. This makes it possible to provide a plurality of first liquid chamber passages 121 connected to a plurality of first liquid junction sections 141, and a plurality of second liquid junction pipes 133 connected to a plurality of second liquid junction sections 142.

[0074] Figures 6 to 8 show the configuration of the slitting mold section according to one embodiment.

[0075] Referring to Figure 6, the slit mold portion 150 has a shape in which the thickness gradually increases from both ends towards the center, and can have a shape similar to that of a diamond, for example.

[0076] For example, the slitting mold section 150 can be fitted with a symmetrical structure with respect to the center line M.

[0077] For example, the slit mold portion 150 may be provided with a protrusion. The protrusion can provide a curve so that the artificial turf manufactured using the double-sided yarn of the present invention looks similar to natural grass blades, and can also absorb scattered dust and moisture.

[0078] For example, multiple protrusions may be provided. For example, a first protrusion 151 may be formed in the center, and second protrusions 152, which are smaller in size than the first protrusion 151, may be provided on both sides thereof. This can improve the verticality of the double-sided yarn.

[0079] Figure 7 shows the configuration in which the first and second liquids flow into the slit mold section of Figure 6.

[0080] The manufacturing apparatus 100 for double-sided yarn for artificial turf according to the present invention is characterized in that the first liquid and the second liquid flow into the slit mold section 150 while in contact with each other, and as shown in Figure 7, it can be confirmed that the first liquid and the second liquid flow in with a uniform thickness relative to the center line M of the slit mold section 150.

[0081] Referring to Figure 8, the slit mold portion 150a may further include projections 153. The projections 153 may be formed only on the first projection 151 located in the central portion, or only on the second projection 152, or on both the first projection 151 and the second projection 152.

[0082] Furthermore, smaller protrusions may be formed on the projection 153. This can improve the perpendicularity of the double-sided filament.

[0083] Referring to Figure 9, the present invention allows the first or second liquid to be introduced into the slitting mold section 150 to have a wider thickness, depending on the desired physical properties of the double-sided yarn. This makes it possible to manufacture double-sided yarn that achieves a color and curl very similar to natural grass, and it is also possible to configure the double-sided yarn to change shape according to the surrounding environment such as time and temperature. In this case, the first or second liquid may each consist of one or more liquids.

[0084] On the other hand, the present invention provides double-sided yarn for artificial turf manufactured by the above-described manufacturing apparatus for double-sided yarn for artificial turf.

[0085] The double-sided yarn for artificial turf may include a first surface formed by the first liquid and a second surface formed by the second liquid. In this case, the double-sided yarn for artificial turf may include any of the following: (1) The first surface and the second surface have different hues, (2) The gloss of the first surface and the second surface are different. (3) The first surface and the second surface have different roughness, (4) The curvature of the first surface and the second surface differs depending on the intensity, wavelength, or temperature of the irradiated light, and (5) A combination of the above (1) to (4).

[0086] For example, the first liquid may be mixed with a dye to form the dark green color of the surface of natural grass, and the second liquid may be mixed with a dye to form a light green (or pale green) color similar to that of the underside of natural grass.

[0087] For example, the first liquid may be mixed with a dye to form a dark green color on the surface of natural grass, and the second liquid may be mixed with a dye to form a brown color.

[0088] As a result, the double-sided yarn for artificial turf of the present invention can have a natural color difference between the front and back surfaces, just like natural grass, and the color combination of the double-sided yarn for artificial turf can be changed depending on the season.

[0089] For example, a matting agent may be added to only one of the first or second liquid. The matting agent can be a product or component known in the art.

[0090] As a result, the double-sided yarn for artificial turf of the present invention has a relatively high light reflectivity on the side without the quenching agent, for example, the top surface, which can mimic the smooth texture of the top surface of natural grass, and a low light reflectivity on the side with the quenching agent added, for example, the back surface, which can mimic the hazy (surface-haze) texture of the underside of natural grass.

[0091] For example, additives may be added so that the surface roughness of the first and second liquids are different.

[0092] For example, the additives include non-polyolefin beads and silicone granules. As an example, the non-polyolefin beads have a particle size of 0.1 to 80 μm, a melting point of 300 to 550°C, and a surface area of ​​1 mm² of the raw yarn. 2 Each can contain 3 to 15 beads. For example, the non-polyolefin beads may be one or more selected from the group consisting of polyurethane, polyamide, polyester, and poly(trimethylene terephthalate). For example, the silicone granules can be manufactured to have a particle size of 0.1 to 80 μm, and by using silicone granules in the present invention, the slipperiness and abrasion resistance of the double-sided artificial turf surface of the present invention can also be improved.

[0093] As a result, the double-sided yarn for artificial turf of the present invention can mimic the texture of the underside of natural grass by increasing the roughness of the side to which the additive is added, for example, the underside.

[0094] On the other hand, the double-sided yarn for artificial turf of the present invention can also be manufactured to have different roughness depending on the shape of the slit mold sections 150 and 150a applied to the manufacturing apparatus.

[0095] For example, the first and second liquids may be made from raw materials with different coefficients of thermal expansion, which can change the rate of shrinkage due to temperature changes.

[0096] For example, by adding TiO2 to either the first or second liquid, the curvature of the first and second surfaces can be made to differ depending on temperature changes, the characteristics of the irradiated light, such as the intensity and wavelength of the irradiated light.

[0097] This allows for various effects by making either the first or second surface appear raised depending on the characteristics of light and temperature changes.

[0098] In other words, as described above, the present invention employs a structure in which a double-sided yarn is formed in a manner in which the first liquid and the second liquid come into contact with each other within the slit mold sections 150, 150a. This not only allows for easy control of the thickness of the first and second liquids, but also provides a double-sided yarn that can be used to create a variety of effects and imitate natural grass.

[0099] As described above, the specific details of the present invention have been explained by embodiments with reference to the attached drawings. However, since the embodiments described above are merely examples of preferred examples of the present invention, it should not be understood that the present invention is limited to the embodiments described above. The scope of the present invention should be understood in the claims and equivalent concepts described later.

[0100] For example, the drawings schematically represent each component to facilitate understanding, and the thickness, length, number, etc., of each component shown may differ from the actual dimensions due to the drawing process. Furthermore, the materials, shapes, dimensions, etc., of each component shown in the above embodiments are examples only and are not particularly limited; various modifications are possible within a range that does not substantially deviate from the effects of the present invention. [Explanation of symbols]

[0101] 10 Supply unit, 20 Forming unit, 30 Molding unit, 1 First liquid supply pipe, 2 Second liquid supply pipe, 100 Manufacturing apparatus for double-sided yarn for artificial turf, 110 First pressure control unit, 111 First liquid discharge pipe, 112 Second pressure control unit, 120 First liquid chamber, 121 First liquid chamber passage pipe, 130 Second liquid chamber, 131 Second liquid chamber discharge pipe, 132 Second liquid separation discharge pipe, 133 Second liquid confluence pipe, 140 Confluence section, 141 First liquid confluence section, 142 Second liquid confluence section, 150, 150a Slit mold section, 151 First protrusion, 152 Second protrusion, 153 Projection, 160 Yarn forming pipe, M Centerline, L1 First liquid, L2 Second liquid.

Claims

1. A first liquid supply pipe through which the molten first liquid is supplied, A second liquid supply pipe is located in a space physically separated from the first liquid supply pipe, and is supplied with molten second liquid. A manufacturing apparatus for double-sided yarn for artificial turf, comprising a confluence section where the first liquid flowing in through the first liquid supply pipe and the second liquid flowing in through the second liquid supply pipe merge.

2. A slit mold section is located at the lower part of the aforementioned confluence section. The apparatus for manufacturing double-sided yarn for artificial turf according to claim 1, wherein the first liquid and the second liquid flow into the slit mold section while flowing continuously, and double-sided yarn is formed in a manner in which they come into contact with each other within the slit mold section.

3. The aforementioned merging section includes multiple sections. The apparatus for manufacturing double-sided yarn for artificial turf according to claim 1, wherein a second liquid separation and discharge pipe is provided for separating and discharging the second liquid to a plurality of confluence sections before the second liquid supplied via the second liquid supply pipe flows into the confluence section.

4. A second liquid confluence pipe is further provided, extending to a predetermined length, so that the second liquid separated through the second liquid separation and discharge pipe flows horizontally. The apparatus for manufacturing double-sided yarn for artificial turf according to claim 3, wherein the end of the second liquid confluence pipe is connected to the confluence section.

5. A first liquid chamber is further provided, which has a first liquid chamber penetration pipe through which the first liquid passes, located above the aforementioned confluence. The apparatus for manufacturing double-sided yarn for artificial turf according to claim 4, wherein the second liquid confluence pipe extends from the lower part of the first liquid chamber.

6. Manufactured by a double-sided yarn manufacturing apparatus for artificial turf according to any one of claims 1 to 5, comprising a first surface formed by the first liquid and a second surface formed by the second liquid, (1) The first surface and the second surface have different hues, (2) The gloss of the first surface and the second surface are different, (3) The first surface and the second surface have different roughness, (4) The curvature of the first surface and the second surface differs depending on the intensity, wavelength, or temperature of the irradiated light, (5) A double-sided yarn for artificial turf, comprising any combination of (1) to (4) above.

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