Apparatus for manufacturing double-sided yarn for artificial turf and double-sided yarn for artificial turf manufactured thereby

Abstract

A device for manufacturing a double-sided yarn for artificial turf is provided. In one embodiment, it may include: a 1-liquid supply pipe through which a molten 1-liquid is supplied; a 2-liquid supply pipe which is disposed in a space physically separated from the 1-liquid supply pipe and through which a molten 2-liquid is supplied; and a confluence unit in which the 1-liquid introduced through the 1-liquid supply pipe and the 2-liquid introduced through the 2-liquid supply pipe join.

Description

Technical Field

[0001] The present disclosure relates to a device 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 is configured by including an artificial turf pad, a shock-absorbing pad supporting 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 remedy the various shortcomings of natural turf, it has primarily been used in sports fields of ball games such as a baseball park, a soccer field, and a golf course.

[0004] Artificial turf is increasingly used more and more since it always maintains its green color regardless of the season, has properties that are not affected by environmental conditions of climate or the like, and is also easy to construct and maintain.

[0005] Although artificial turf has a higher initial construction cost than natural turf, it is highly preferred since it can be used semi-permanently, is easy to maintain, and can always be maintained as an even surface suitable for exercise.

[0006] Artificial turf is artificially manufactured in the form of grass using synthetic fiber materials, it is formed by backstitching yarns formed in the form of grass onto a backing substrate that becomes a base, and in order to prevent the yarns formed in the form of grass from separating from the backing substrate, a coating agent containing an adhesive component is applied to the lower surface of the backing substrate.

[0007] Recently, artificial turf has been subjected to research and development so that artificial turf can be used for a long period of time while having a feeling similar to that of natural turf.

[0008] However, nylon was mainly used as the initial artificial turf yarn, and although the yarn formed from nylon has characteristics of being tough and having wear resistance, the surface friction force of the yarn is high, so there has been a risk of joint injuries or burns when it rubs against the body.

[0009] Attempts have been made to modify the yarn composition, change the molding method, or develop a yarn manufacturing device to overcome these issues, but achieving properties and appearance similar to those of natural turf was difficult.

[0010] Specifically, conventionally developed artificial turf yarn manufacturing devices are difficult to equip with facilities for manufacturing yarns with two or more characteristics in order to achieve similar physical properties and appearance to natural turf, are designed with a structure that inevitably causes the manufactured yarns to exhibit two or more characteristics, or even if a structure in which yarns are formed from two or more raw solutions is applied to the artificial turf yarn manufacturing devices, the yarns are manufactured by a method of attaching the raw solutions in separate pipes after injecting the raw solutions of two or more yarns into spatially separated molds, so the difficult structure is applied in which the bonding of the two or more raw solutions is insufficient.DISCLOSURE Technical Problem

[0011] The present disclosure is for providing a device for manufacturing a double-sided yarn for artificial turf having properties and appearance similar to those of natural turf by solving the above-mentioned problems, and a double-sided yarn for artificial turf manufactured thereby, and for manufacturing a double-sided yarn for artificial turf in which two or more raw solutions are continuously manufactured into one yarn using the fluid flow of the raw solutions, but the bonding properties of the two or more raw solutions are improved.Technical Solution

[0012] In order to solve the above-mentioned problems, the present disclosure provides a device for manufacturing a double-sided yarn for artificial turf, including: a 1-liquid supply pipe through which a molten 1-liquid is supplied; a 2-liquid supply pipe which is spatially separated from the 1-liquid supply pipe and through which a molten 2-liquid is supplied; and a confluence unit in which the 1-liquid introduced through the 1-liquid supply pipe and the 2-liquid introduced through the 2-liquid supply pipe join.

[0013] Furthermore, the present disclosure provides a double-sided yarn for artificial turf, which is manufactured by the above-described device for manufacturing a double-sided yarn for artificial turf to include a first surface formed by the 1-liquid and a second surface formed by the 2-liquid, and includes any one of the following: the first surface and the second surface have different colors; the first surface and the second surface have different glosses; the first surface and the second surface have different roughnesses; the first surface and the second surface have different warpages depending on changes in the intensity, wavelength, or temperature of irradiated light; and combinations thereof.Advantageous Effects

[0014] According to one embodiment of the present disclosure, the process efficiency can be improved by allowing two or more raw solutions to be continuously manufactured into a single double-sided yarn using the fluid flow of the raw solutions.

[0015] In addition, the present disclosure can improve the reliability of the quality of the manufactured double-sided yarn by preparing a joining part above the slit mold unit to offset the hydraulic pressure and flow rate of the raw solutions.

[0016] In addition, the present disclosure can manufacture a double-sided yarn with physical properties and appearance similar to natural turf by allowing 1-liquid and 2-liquid to come into contact and be extruded in the slit mold unit so that natural curls and color senses are exhibited.Brief Description of Drawings

[0017] FIG. 1 illustrates a system for manufacturing a double-sided yarn for artificial turf according to one embodiment of the present disclosure. FIGS. 2 to 5 illustrate a device for manufacturing a double-sided yarn for artificial turf, wherein FIG. 3 illustrates flow directions of 1-liquid and 2-liquid in FIG. 2, FIG. 4 illustrates in detail a form in which 1-liquid and 2-liquid join, and FIG. 5 illustrates an xz-axis cross-section at position AA in FIG. 4 in order to illustrate in detail the form in which 1-liquid and 2-liquid join. FIGS. 6 to 9 illustrate forms of slit mold units according to respective embodiments. Mode for Invention

[0018] Hereinafter, embodiments of the present disclosure will be described in detail. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, and these embodiments are merely provided to make the disclosure of the present disclosure complete and to more fully inform the contents of the present disclosure of those skilled in the art.

[0019] Meanwhile, the double-sided yarn described in the present disclosure may be applied with those having a denier of 150 to 2500 denier based on the monofilament.

[0020] Meanwhile, the monofilament referred to in the present disclosure may refer to a double-sided yarn, and for example, a double-sided yarn formed by contacting 1-liquid and 2-liquid.

[0021] The following description will be described in detail with reference to the drawings.

[0022] The applicant of the present disclosure has developed the present disclosure by making various design modifications to the applicant's equipment and conducting various trials and errors in order to manufacture a double-sided yarn for artificial turf that exhibits two or more physical properties to the double-sided yarn for artificial turf, but has physical properties and appearance similar to those of natural turf. Specifically, the applicant of the present disclosure has made it so that while joining 1-liquid and 2-liquid, which are raw materials that are physically separated and introduced through different paths, at a confluence unit, hydraulic and flow rate differences are offset and then allowing 1-liquid and 2-liquid to come into contact with each other and flow into a slit mold unit where extrusion mold of the double-sided yarn is performed. Accordingly, the applicant of the present disclosure has developed a device for manufacturing a double-sided yarn for artificial turf capable of manufacturing a double-sided yarn for artificial turf having similar physical properties and appearance to natural turf while achieving a continuous double-sided yarn forming process by allowing 1-liquid and 2-liquid to flow continuously.

[0023] FIG. 1 illustrates a system for manufacturing a double-sided yarn for artificial turf according to one embodiment of the present disclosure.

[0024] Referring to FIG. 1, the system for manufacturing a double-sided 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 molten raw solutions to the forming unit, and raw solutions in which various known materials are melted may be supplied.

[0026] For example, materials for the raw solutions may include synthetic resins such as polypropylene, polyethylene, and nylon, dyes for color expression, UV stabilizers, antioxidants, and antistatic agents for preventing the generation of static electricity.

[0027] For example, the raw solutions may include those in which one or more of the materials are melted.

[0028] For example, two or more raw solutions may be supplied, and at least one different material may be contained therein.

[0029] The forming unit 20 is for forming a double-sided yarn for artificial turf from the raw solutions, and the device 100 for manufacturing a double-sided yarn for artificial turf, which will be described later with reference to FIGS. 2 to 7, may be applied.

[0030] The molding unit 30 is for molding the double-sided yarn formed in the forming unit 20 depending on the intended use, and may include yarn stretching, cooling, and tufting, and the order of each step, the device applied, and the manufacturing conditions may be changed depending on the intended use.

[0031] FIGS. 2 to 5 illustrate a device for manufacturing a double-sided yarn for artificial turf, wherein FIG. 3 illustrates flow directions of 1-liquid and 2-liquid in FIG. 2, FIG. 4 illustrates in detail a form in which 1-liquid and 2-liquid join, and FIG. 5 illustrates an xz-axis cross-section at position AA in FIG. 4 in order to illustrate in detail the form in which 1-liquid and 2-liquid join.

[0032] Referring to FIGS. 2 and 3, the raw solutions are supplied to the device 100 for manufacturing a double-sided yarn for artificial turf, and the double-sided yarn for artificial turf is formed, which may then be discharged to the forming unit 30 described above. In FIG. 3, the arrow represented by a solid line indicates the flow of the 1-liquid (L1), and the arrow represented by a dotted line indicates the flow of the 2-liquid (L2).

[0033] The device 100 for manufacturing a double-sided yarn for artificial turf includes a 1-liquid supply pipe 1 through which molten 1-liquid is supplied, a 2-liquid supply pipe 2 which is spatially separated from the 1-liquid supply pipe 1 and through which molten 2-liquid is supplied, and a confluence unit 140 in which a 1-liquid introduced through the 1-liquid supply pipe 1 and a 2-liquid introduced through the 2-liquid supply pipe join.

[0034] At this time, the 1-liquid and 2-liquid may be ones melted from the same material or ones melted from different materials. In addition, the 1-liquid and 2-liquid may be melted from the same synthetic resin, but may be ones melted from materials containing additives, e.g., dyes and antistatic agents, in different amounts to exhibit different physical properties.

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

[0036] The first pressure control unit 110 can control the hydraulic pressure of the 1-liquid introduced through the 1-liquid supply pipe 1 depending on preset conditions. Accordingly, the flowability of the 2-liquid joined at the confluence unit 140 may be primarily controlled so that it flows continuously at a uniform flow rate and hydraulic pressure, thereby improving quality reliability.

[0037] A 1-liquid discharge pipe 111 may be connected to the first pressure control unit 110.

[0038] The 1-liquid discharge pipe 111 may allow a 1-liquid, whose flowability is primarily controlled, to flow, and for example, a height difference for both ends may be provided so that the 1-liquid flows in a state in which the self-weight of the 1-liquid is added to the flow rate controlled by the first pressure control unit 110. For example, the 1-liquid discharge pipe 111 may be extended vertically.

[0039] A second pressure control unit 112 may be provided at one end of the 1-liquid discharge pipe 111.

[0040] The second pressure control unit 112 can control the hydraulic pressure of the 1-liquid depending on preset conditions. Accordingly, the flowability of the 1-liquid and 2-liquid, which join at the confluence unit 140, can be controlled secondarily so that they flow continuously at a uniform speed and pressure, thereby improving quality reliability. For example, the 2-liquid may flow under its own weight, 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 1-liquid to correspond to the hydraulic pressure and flow rate of the 2-liquid.

[0041] The second pressure control unit 112 may be connected to the 1-liquid chamber 120.

[0042] A confluence unit 140 for joining the 1-liquid and 2-liquid is provided at one end of the 1-liquid chamber 120. At this time, the 1-liquid chamber 120 enables the 1-liquid, which has passed through the 1-liquid chamber passing pipe 121 passing through the 1-liquid chamber 120, and the 2-liquid, which is introduced by being spatially separated from the 1-liquid flow path, to stably join in the confluence unit 140.

[0043] A slit mold unit 150 is provided at the bottom of the confluence unit 140.

[0044] The slit mold unit 150 is for forming a double-sided yarn for the artificial turf being manufactured into a preset form, and is applied with an extrusion mold form.

[0045] The present disclosure is characterized in that the 1-liquid and 2-liquid flow continuously while the 1-liquid and 2-liquid contact in a space defined by the slit mold unit 150. That is, the 1-liquid and 2-liquid flow into the slit mold unit 150 while flowing continuously, having a structure in which a double-sided yarn is formed in a form in which they contact with each other within the slit mold unit 150. Accordingly, the bonding force between the 1-liquid and 2-liquid may be improved. In addition, since the 1-liquid and 2-liquid can form a double-sided yarn so that they contact with each other within the slit mold unit 150, the present disclosure can easily control the contents of the 1-liquid and 2-liquid constituting the double-sided yarn.

[0046] Meanwhile, the structure where the 1-liquid and 2-liquid join is described in detail with reference to FIG. 4, and the confluence unit 140 and the slit mold unit 150 are described in detail with reference to FIGS. 6 to 8.

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

[0048] The 2-liquid chamber 130 has a predetermined volume to store and / or pass the 2-liquid having a predetermined hydraulic pressure, which has been introduced by the 2-liquid supply pipe 2.

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

[0050] For example, a hydraulic pressure gauge may be installed in the 2-liquid chamber 130 to measure the hydraulic pressure of the 2-liquid.

[0051] A 2-liquid chamber discharge pipe 131 may be connected to one end of the 2-liquid chamber 130.

[0052] For example, the 2-liquid may flow by its own weight along the 2-liquid chamber discharge pipe 131.

[0053] A plurality of 2-liquid separation discharge pipes 132 may be connected to one end of the 2-liquid chamber discharge pipe 131.

[0054] The 2-liquid separation discharge pipes 132 are provided to separate and discharge the 2-liquid into a plurality of confluence units 140 before the 2-liquid flows into the confluence units 140.

[0055] For example, the 2-liquid separation discharge pipe 132 may have a structure consisting of a single space in which a pipe extended to be inclined at a predetermined angle is continuously formed to 360°. For example, as both the outer and inner sides of the 2-liquid separation discharge pipe 132 extend downward, the 2-liquid separation discharge pipe 132 may include a tapered shape so that the area of the xz-axis cross-section increases.

[0056] For example, a plurality of the 2-liquid separation discharge pipes 132 may be provided with being spatially separated.

[0057] A 2-liquid confluence pipe 133 may be connected to one end of the 2-liquid separation discharge pipe 132.

[0058] The 2-liquid confluence pipe 133 may refer to a region where the 2-liquid discharged from the 2-liquid separation discharge pipe 132 flows beneath the 1-liquid chamber 120.

[0059] The 2-liquid confluence pipe 133 may have a structure of extending horizontally a predetermined length in a direction away from the 2-liquid separation discharge pipe 132 so that the 2-liquid can move horizontally a predetermined distance. Accordingly, the flow rate of the 2-liquid introduced through the 2-liquid separation discharge pipe 132 under its own weight can be easily controlled.

[0060] One end of the 2-liquid confluence pipe 133 is connected to the confluence unit 140 provided above the slit mold unit 150.

[0061] After the 1-liquid and 2-liquid described above flow into the confluence unit 140 so that they come into contact at the same height, a double-sided yarn is extrusion-formed while they continuously flow along the yarn forming pipe 160 in a state in which they come into contact at the slit mold unit 150.

[0062] Referring to FIG. 4, the 1-liquid and 2-liquid join at the confluence unit 140.

[0063] For example, the 1-liquid and 2-liquid may come into contact at the confluence unit 140. That is, the present disclosure is characterized in that a double-sided yarn is continuously manufactured in a state in which the 1-liquid and 2-liquid come into contact at the slit mold unit 150, but if the 1-liquid and 2-liquid introduced from different directions immediately join at the slit mold unit 150, it is not easy to control the 1-liquid and 2-liquid continuously introduced to have a uniform thickness within the slit mold unit 150. Therefore, the present disclosure may provide a confluence unit 140 at a location where continuously flowing 1-liquid and 2-liquid come into contact so that the hydraulic pressure of each fluid is offset, thereby maintaining the continuity of the process to increase process efficiency, improving the bonding force of the 1-liquid and 2-liquid, and improving the reliability of the quality of the manufactured double-sided yarn.

[0064] For example, the confluence unit 140 may have a structure extending from the distal end of the 1-liquid chamber passing pipe 121 in a direction away from the 2-liquid confluence pipe 133. With this structure, the phenomenon in which the 1-liquid, which has flowed into the confluence unit 140 under a pre-controlled pressure and its own weight, is pushed a predetermined distance by the hydraulic pressure of the 2-liquid introduced along the 2-liquid confluence pipe 133 may be reflected. Accordingly, the 1-liquid and 2-liquid may be stably introduced into the slit mold unit 150 and extruded into a double-sided yarn by offsetting the hydraulic pressure and flow rate differences between the 1-liquid and 2-liquid may be offset above the slit mold unit 150, i.e., at the confluence unit 140.

[0065] Meanwhile, in order to achieve physical properties and appearance similar to natural turf, the present disclosure can control the content ratio of the 1-liquid and 2-liquid constituting the double-sided yarn.

[0066] For example, the hydraulic pressures of the 1-liquid and 2-liquid flowing into the confluence unit 140 can be controlled to be equal to allow each of the 1-liquid and 2-liquid to occupy equal thicknesses and be extruded downward based on the central line of the slit mold unit 150.

[0067] For example, a double-sided yarn having physical properties and appearance similar to natural turf can be manufactured by controlling the hydraulic pressure of the 1-liquid flowing into the confluence unit 140 to be higher than that of the 2-liquid, or by controlling the hydraulic pressure of the 2-liquid to be higher than that of the 1-liquid.

[0068] For example, in order to exhibit a natural curl or color sense similar to natural turf, the 1-liquid and 2-liquid can be applied with one selected from polypropylene, polyamide, polyethylene, nylon, polyvinyl chloride, polyurethane, and combinations thereof.

[0069] As a specific example, the device 100 for manufacturing a double-sided yarn for artificial turf of the present disclosure can be applied to manufacture a yarn in which one surface exhibits a rough texture and the other surface exhibits a smooth texture.

[0070] As a specific example, the curl can change depending on the surrounding environment temperature conditions by applying the 1-liquid and 2-liquid having different thermal expansion characteristics by applying the device 100 for manufacturing a double-sided yarn for artificial turf of the present disclosure. In addition, a double-sided yarn exhibiting different color senses can be manufactured by changing the curl depending on the sunlight amount, sunlight time zone, and surrounding environment temperature conditions by applying different color senses to the 1-liquid and 2-liquid.

[0071] FIG. 5 illustrates a form in which 1-liquid and 2-liquid join as an xz-axis cross-section at position AA in FIG. 4.

[0072] The confluence unit 140 may include a 1-liquid confluence unit 141 and a 2-liquid confluence unit 142, wherein the 1-liquid confluence unit 141 refers to a region where the 1-liquid that has passed through the 1-liquid chamber passing pipe 121 of FIG. 4 flows in, and the 2-liquid confluence unit 142 refers to a region where the 2-liquid that has been discharged through the lower end portion of the 2-liquid separation discharge pipe 132 is introduced along the 2-liquid confluence pipe 133 and then flows into the confluence unit 140.

[0073] As shown in FIG. 5, a plurality of confluence units 140 and a plurality of slit mold units 150 may be provided, and each confluence unit 140 may be provided with a plurality of 1-liquid confluence units 141 and 2-liquid confluence units 142. Accordingly, a plurality of 1-liquid chamber passing pipes 121 connected to the plurality of 1-liquid confluence units 141 may be provided, and a plurality of 2-liquid confluence pipes 133 connected to the plurality of 2-liquid confluence units 142 may be provided.

[0074] FIGS. 6 to 8 illustrate forms of a slit mold unit according to one embodiment.

[0075] Referring to FIG. 6, the slit mold unit 150 may have a shape that gradually increases in thickness from both end portions toward the central portion, for example, a shape similar to diamond.

[0076] For example, the slit mold unit 150 may be applied with a structure that is symmetrical based on the centerline (M).

[0077] For example, the slit mold unit 150 may be provided with a protrusion part. The protrusion part may perform a function of providing a curve to make the artificial turf manufactured using the double-sided yarn of the present disclosure look similar to natural turf leaves, or may perform a function of absorbing flying dust or moisture.

[0078] For example, a plurality of protrusion parts may be provided. For example, the protrusion parts may be provided with a first protrusion part 151 which is formed in the central portion and second protrusion parts 152 which are formed on both sides of the first protrusion part 151 and smaller than the first protrusion part 151 in the size. Accordingly, the verticality of the double-sided yarn can be improved.

[0079] FIG. 7 illustrates a form in which the 1-liquid and 2-liquid are introduced into the slit mold unit of FIG. 6.

[0080] The device 100 for manufacturing a double-sided yarn for artificial turf of the present disclosure is characterized in that the 1-liquid and 2-liquid are introduced while coming into contact with the slit mold unit 150, and it can be confirmed that the 1-liquid and 2-liquid are introduced so that they have an equal thickness based on the centralline (M) of the slit mold unit 150 as shown in FIG. 7.

[0081] Referring to FIG. 8, the slit mold unit 150a may further include a protrusion 153. The protrusion 153 may be formed only on the first protrusion part 151 provided in the central portion, only on the second protrusion parts 152, or on both the first protrusion part 151 and the second protrusion parts 152.

[0082] In addition, small protrusions with smaller sizes may also be formed on the protrusion 153. Accordingly, the verticality of the double-sided yarn can be improved.

[0083] Referring to FIG. 9, the present disclosure may allow the 1-liquid or 2-liquid to be injected into the slit mold unit 150 to have a wider thickness depending on the desired physical properties of the double-sided yarn. Accordingly, a double-sided yarn implementing a color sense and curling very similar to natural turf can be manufactured, and implementation may be performed so that the form of the double-sided yarn can be changed depending on environmental conditions such as time, temperature, or the like. At this time, the 1-liquid or 2-liquid may each consist of one or more liquids.

[0084] Meanwhile, the present disclosure provides a double-sided yarn for artificial turf manufactured by the above-described device for manufacturing a double-sided yarn for artificial turf.

[0085] The double-sided yarn for artificial turf may include a first surface formed by the 1-liquid and a second surface formed by the 2-liquid. At this time, the double-sided yarn for artificial turf may include any of the following: (1) the first surface and the second surface have different colors; (2) the first surface and the second surface have different glosses; (3) the first surface and the second surface have different roughnesses; (4) the first surface and the second surface have different warpages depending on changes in the intensity, wavelength, or temperature of irradiated light; and (5) combinations of (1) to (4) above.

[0086] For example, the 1-liquid may be mixed with dyes for forming a deep green color on the surface of natural turf, and the 2-liquid may be mixed with dyes for forming a yellow green (or pale green) color similar to the back surface of natural turf.

[0087] For example, the 1-liquid may be mixed with dyes for forming a deep green color on the surface of natural turf, and the 2-liquid may be mixed with dyes for forming a brown color.

[0088] Therefore, the double-sided yarn for artificial turf of the present disclosure can have a natural color difference between the front and back surfaces like natural turf, and the color combination of the double-sided yarn for artificial turf can be changed according to the season.

[0089] For example, a matting agent may be added to only one of the 1-liquid and 2-liquid. A product or ingredient known in the art may be applied as the matting agent.

[0090] Therefore, a surface to which the matting agent is not added of the double-sided yarn for artificial turf of the present disclosure, for example, the top surface thereof, has relatively high light reflectivity and can replicate the smooth texture of the top surface of natural turf, and a surface to which the matting agent is added thereof, for example, the back surface, has low light reflectivity and can replicate the matte texture of the bottom surface of natural turf of the bottom surface of natural turf.

[0091] For example, additives may be added to vary the surface roughness of the 1-liquid and 2-liquid.

[0092] For example, the additives may include non-polyolefin beads, silicone granules, etc. For example, the non-polyolefin beads may have a particle size of 0.1 to 80 µm, a melting point of 300 to 550°C, and may include 3 to 15 beads per 1 mm 2< of the yarn surface area. 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 may be manufactured to have a particle size of 0.1 to 80 µm, and the slipperiness and wear resistance of the surface of the double-sided artificial turf of the present disclosure can also be improved by using the silicone granules in the present disclosure.

[0093] Accordingly, the double-sided yarn for artificial turf of the present disclosure can replicate the texture of the bottom surface of natural turf by increasing the roughness of the surface to which the additive is added, for example, the bottom surface.

[0094] Meanwhile, the double-sided yarn for artificial turf of the present disclosure can also be manufactured to have different roughness even with the shapes of the slit mold units 150 and 150a applied to the manufacturing device.

[0095] For example, the 1-liquid and 2-liquid may be applied with raw materials with different coefficients of thermal expansion, resulting in varying shrinkage rates depending on temperature changes.

[0096] For example, TiO 2 can be added to any one of the 1-liquid or 2-liquid, thereby varying the warpages of the first and second surfaces depending on temperature changes and the characteristics of light irradiated, for example, the intensity and wavelength of light irradiated.

[0097] Therefore, any one surface of the first and second surfaces can be shown to stand out depending on the characteristics of light or temperature changes, enabling a variety of productions.

[0098] That is, the present disclosure adopts a structure of forming a double-sided yarn in a form in which the 1-liquid and 2-liquid are in contact with each other within the slit mold units 150 and 150a as mentioned above, thereby providing a double-sided yarn that not only easily controls the thicknesses of the 1-liquid and 2-liquid, but also enables a variety of productions and can replicate natural turf.

[0099] As described above, the specific description for the present disclosure has been made by embodiments with reference to the attached drawings, but since the above-described embodiments merely explain preferred examples of the present disclosure, the present disclosure should not be construed as being limited to the above-described embodiments, and the scope of rights of the present disclosure should be understood as the claims described later and concepts equivalent thereto.

[0100] For example, the drawings schematically show each component as the main body to aid understanding, and the thickness, length, number, etc. of each component illustrated may differ from the actual configuration due to the progress of drawing up of the drawing. Furthermore, the material, shape, dimensions, etc. of each component shown in the above-described embodiments are merely examples and are not particularly limited, and various modifications are possible without substantially departing from the effects of the present disclosure.

Claims

1. A device for manufacturing a double-sided yarn for artificial turf, comprising: a 1-liquid supply pipe through which a molten 1-liquid is supplied; a 2-liquid supply pipe which is disposed in a space physically separated from the 1-liquid supply pipe and through which a molten 2-liquid is supplied; and a confluence unit in which the 1-liquid introduced through the 1-liquid supply pipe and the 2-liquid introduced through the 2-liquid supply pipe join.

2. The device of claim 1, having a structure in which a slit mold unit is disposed below the confluence unit, and the 1-liquid and 2-liquid flow into the slit mold unit while they are continuously flowing, and the double-sided yarn is formed in a form in which the 1-liquid and 2-liquid contact each other within the slit mold unit.

3. The device of claim 1, wherein a plurality of the confluence units are included, and there is provided a 2-liquid separation discharge pipe for separating and discharging the 2-liquid into the plurality of the confluence units before the 2-liquid supplied through the 2-liquid separation discharge pipe flow into the confluence units.

4. The device of claim 3, further comprising a 2-liquid confluence pipe extended to a predetermined length so that the 2-liquid separated through the 2-liquid separation discharge pipe can flow in a horizontal direction, wherein the end of the 2-liquid confluence pipe is connected to the confluence unit.

5. The device of claim 4, further comprising a 1-liquid chamber which is formed above the confluence unit and provided with a 1-liquid chamber passing pipe through which the 1-liquid passes, wherein the 2-liquid confluence pipe extends from the lower portion of the 1-liquid chamber.

6. A double-sided yarn for artificial turf, which is manufactured by the device for manufacturing a double-sided yarn for artificial turf according to any one of claims 1 to 5 to include a first surface formed by the 1-liquid and a second surface formed by the 2-liquid, and includes any one of the following. (1) the first surface and the second surface have different colors (2) the first surface and the second surface have different glosses (3) the first surface and the second surface have different roughnesses (4) the first surface and the second surface have different warpages depending on changes in the intensity, wavelength, or temperature of irradiated light (5) combinations of (1) to (4) above

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