Artificial turf pile, artificial turf mat, artificial turf structure having heat-insulating performance and method for manufacturing the same

Abstract

The present invention relates to an artificial turf pile yarn having heat-insulating performance, an artificial turf mat, an artificial turf structure, and a method for manufacturing the same, wherein the artificial turf is manufactured using an artificial turf pile yarn produced by using a heat-insulating masterbatch containing a heat-insulating reinforcing material, thereby enabling the artificial turf to have heat-insulating performance and preventing the artificial turf from overheating due to heat waves in summer.

Description

Technology Field

[0001] The present invention relates to an artificial turf pile yarn having heat-insulating performance, an artificial turf mat, an artificial turf structure, and a method for manufacturing the same, wherein the artificial turf is manufactured using an artificial turf pile yarn produced by using a heat-insulating masterbatch containing a heat-insulating reinforcing material, thereby enabling the artificial turf to have heat-insulating performance and preventing the artificial turf from overheating due to heat waves in summer. Background Technology

[0002] In general, artificial turf is widely used in various locations, such as areas where the climate makes it difficult for natural grass to grow or where grass maintenance is challenging.

[0003] Artificial turf is widely installed in dome stadiums, buildings, schools, and playgrounds because it can be used semi-permanently, making it usable in all four seasons, and maintenance is easier than that of natural grass. When installed in large areas such as sports fields, it is provided in a roll form and can be spread out on the ground for installation.

[0004] However, in these conventional artificial turf, the artificial turf pile fibers absorb solar heat and heat up during the summer, resulting in an average temperature that is about 15°C higher than that of a natural grass field. This high temperature phenomenon is exacerbated by the heat sink effect, causing the surface temperature of the artificial turf to reach 60 to 75°C during the summer, which poses a problem that makes playing impossible due to increased fatigue caused by the high temperature and burns from frictional heat.

[0005] Furthermore, in the case of artificial turf installed in densely populated urban areas, there is a problem in that the urban heat island effect can be accelerated because heat cannot be absorbed or escaped from the city center due to the turf's inability to absorb heat.

[0006] Korean Patent Publication No. 10-1842999 (hereinafter referred to as the prior art) has been disclosed as prior art for solving these problems.

[0007] The aforementioned prior art relates to an "eco-friendly and temperature-reducing artificial turf structure," and aims to obtain a temperature reduction effect through the heat of vaporization by using a moisture-absorbing material to absorb fine moisture from the air, or by spraying water on the surface of an artificial turf sports field or absorbing water from rainwater, causing it to evaporate slowly in clear weather.

[0008] However, in the case of the aforementioned conventional technology, there was a problem in that it was difficult to obtain a substantial temperature reduction effect across the entire artificial turf because the amount of water absorbed and retained in each section of the artificial turf varied significantly depending on weather conditions.

[0009] Therefore, there is a need to develop artificial turf piles, artificial turf mats, artificial turf structures, and methods for manufacturing the same that possess heat-insulating performance capable of preventing the temperature rise of the artificial turf surface by insulating or dissipating solar heat. Prior art literature

[0010] Korean Patent Publication No. 10-1842999 (Published March 29, 2018) The problem to be solved

[0011] The present invention aims to solve the above-mentioned problems by manufacturing a yarn masterbatch, a pigment masterbatch, and a heat-insulating masterbatch, then mixing the yarn masterbatch, the pigment masterbatch, and the heat-insulating masterbatch, and finally melting and extruding the mixture to weave the artificial turf pile yarn, thereby providing an artificial turf pile yarn having excellent heat-insulating performance, an artificial turf mat, an artificial turf structure, and a method for manufacturing the same.

[0012] In addition, the present invention aims to provide an artificial turf pile yarn, an artificial turf mat, an artificial turf structure having thermal insulation performance, and a method for manufacturing the same, by manufacturing a thermal insulation masterbatch comprising hexagonal boron nitride and boron nitride nanotubes with excellent thermal insulation performance.

[0013] In addition, the present invention aims to provide an artificial turf structure that enables smooth vertical drainage and airflow through a plurality of pore holes formed to penetrate the upper and lower surfaces of a drainage plate. means of solving the problem

[0014] To achieve the above-mentioned objective, the artificial turf pile yarn having heat-insulating performance according to the present invention is manufactured by melt-extruding a mixture of 92-98% by weight of a yarn masterbatch made of polyethylene resin, 1-5% by weight of a pigment masterbatch, and 1-5% by weight of a heat-insulating masterbatch, wherein the heat-insulating masterbatch is manufactured by melt-extruding a mixture of 84-94% by weight of polyethylene resin, 5-15% by weight of hexagonal boron nitride with a size of 70-90 nm, 0.1-0.5% by weight of boron nitride nanotubes with a size of 8-12 nm, and 0.3-1.0% by weight of a dispersant.

[0015] In addition, the pigment masterbatch is characterized by being manufactured by melt-extruding a pigment mixture comprising 35-45% by weight of polyethylene resin, 8-15% by weight of polyethylene wax, 27-37% by weight of yellow pigment, 3-10% by weight of green pigment, 1-3% by weight of black pigment, 0.5-2% by weight of antioxidant, and 8-13% by weight of light stabilizer.

[0016] delete

[0017] In addition, the above-mentioned heat-insulating masterbatch is characterized by being manufactured by melt-extruding the above-mentioned heat-insulating mixture at 250°C using a twin-screw mixer, cooling it underwater, and cutting it into a pellet shape.

[0018] In addition, the artificial turf pile yarn having the above-mentioned heat-insulating performance may be tufted onto the upper surface of the air bubble layer to manufacture an artificial turf mat having heat-insulating performance.

[0019] In addition, an artificial turf structure having heat-insulating performance may be manufactured, comprising an artificial turf mat manufactured as described above, a silica sand layer laid at a predetermined height on top of the foam layer, and a filler layer laid at a predetermined height on top of the silica sand layer.

[0020] In addition, the artificial turf mat is characterized by having a drainage plate further provided below the air bubble layer.

[0021] In addition, the drainage plate is characterized by having a plurality of pore holes formed therein.

[0022] In addition, the lower surface of the air bubble layer of the artificial turf mat is further provided with a back coating layer coated with a polymer resin.

[0023] In addition, the method for manufacturing an artificial turf pile yarn having heat-insulating performance according to the present invention comprises: a yarn masterbatch manufacturing step of manufacturing a yarn masterbatch made of polyethylene resin; a pigment masterbatch manufacturing step of manufacturing a pigment masterbatch by melt-extruding a pigment mixture comprising 35-45 wt% polyethylene resin, 8-15 wt% polyethylene wax, 27-37 wt% yellow pigment, 3-10 wt% green pigment, 1-3 wt% black pigment, 0.5-2 wt% antioxidant, and 8-13 wt% light stabilizer; a heat-insulating masterbatch manufacturing step of manufacturing a heat-insulating masterbatch by melt-extruding a mixture comprising 84-94 wt% polyethylene resin, 5-15 wt% hexagonal boron nitride with a size of 70-90 nm, 0.1-0.5 wt% boron nitride nanotubes with a size of 8-12 nm, and 0.3-1.0 wt% dispersant; and the above The artificial turf pile yarn manufacturing step consists of mixing 92~98% by weight of yarn masterbatch, 1~5% by weight of pigment masterbatch, and 1~5% by weight of heat-insulating masterbatch, and then melt-extruding to manufacture artificial turf pile yarn.

[0024] delete

[0025] In addition, the method for manufacturing an artificial turf structure having heat-insulating performance according to the present invention comprises: a first step of tufting an artificial turf pile yarn manufactured by the method for manufacturing an artificial turf pile yarn having heat-insulating performance described above into a foam layer; a second step of forming a back coating layer by coating a polymer resin on the lower surface of the foam layer; a third step of attaching a drainage plate to the lower surface of the back coating layer; and a fourth step of laying a silica sand layer and a filler layer to a predetermined height on the upper surface of the foam layer. Effects of the invention

[0026] The artificial turf pile yarn, artificial turf mat, artificial turf structure having heat-insulating performance provided by the present invention, and the method for manufacturing the same, are manufactured by producing a yarn masterbatch, a pigment masterbatch, and a heat-insulating masterbatch, respectively, and then mixing the yarn masterbatch, the pigment masterbatch, and the heat-insulating masterbatch, and then melting and extruding to weave the artificial turf pile yarn, and by manufacturing it including hexagonal boron nitride and boron nitride nanotubes with excellent heat-insulating performance, the artificial turf pile yarn and the artificial turf structure manufactured therefrom have heat-insulating performance, which has the effect of preventing the artificial turf from overheating during summer heatwaves.

[0027] In addition, the multiple pore holes formed to penetrate the upper and lower surfaces of the drainage plate allow for smooth vertical drainage and airflow of the artificial turf structure, thereby increasing the durability of the artificial turf structure through enhanced drainage. Brief explanation of the drawing

[0028] FIG. 1 is a flowchart illustrating the overall manufacturing sequence of a method for manufacturing an artificial turf structure having heat-insulating performance according to one embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating an artificial turf structure according to one embodiment of the present invention. FIG. 3 is an exploded view illustrating an artificial turf structure according to an embodiment of the present invention, broken down into constituent layers. Specific details for implementing the invention

[0029] With reference to the attached drawings, an artificial turf pile yarn having heat-insulating performance, an artificial turf mat, an artificial turf structure, and a method for manufacturing the same according to a preferred embodiment of the present invention will be described in detail below.

[0030] The terms used herein are not intended to limit the technology described in this document to specific embodiments, and it is preferable to understand that they include various modifications, equivalents, and substitutions of said embodiments.

[0031] The drawings used to describe the present invention may contain exaggerated or omitted parts to facilitate the easy identification of the features of the invention, and this does not limit specific embodiments of the invention.

[0032] In addition, when a specific direction (up, down, left, right, vertical, horizontal, inward, outward, etc.) or order (first, second..., or nth, etc.) is specified in the description of the present invention, it should be understood that such description is merely for the purpose of explaining specific examples to facilitate explanation and aid understanding, and that such description does not limit or restrict a specific configuration or specific embodiment.

[0033] In the following description, it is advisable to understand "masterbatch" as referring to a pellet-shaped material in which basic plastic raw materials and additives to be added are concentrated and dispersed to a high concentration.

[0034] The present invention relates to an artificial turf pile yarn, an artificial turf mat, an artificial turf structure, and a method for manufacturing the same, which can replace natural grass to create sports fields and parks. More specifically, the invention relates to an artificial turf pile yarn having heat-insulating performance that can prevent the artificial turf from overheating in summer heatwaves by mixing a heat-insulating masterbatch capable of providing heat-insulating performance when manufacturing the artificial turf pile yarn (10) constituting the artificial turf structure (1) and extruding the artificial turf pile yarn (10), thereby manufacturing the artificial turf pile yarn (10), and a method for manufacturing an artificial turf structure using the same.

[0035] FIG. 1 is a flowchart illustrating the overall manufacturing sequence of a method for manufacturing an artificial turf structure having heat-insulating performance according to one embodiment of the present invention.

[0036] Hereinafter, the artificial turf pile yarn having heat-insulating performance according to the present invention will be described in detail with reference to FIG. 1.

[0037] As illustrated in FIG. 1, the artificial turf pile yarn (10) of the present invention can be manufactured by producing a yarn masterbatch, a pigment masterbatch, and a heat-insulating masterbatch, respectively, and then mixing and extruding them.

[0038] Specifically, the artificial turf pile yarn (10) is manufactured by mixing 92-98% by weight of yarn masterbatch, 1-5% by weight of pigment masterbatch and 1-5% by weight of heat-insulating masterbatch, and then melting and extruding.

[0039] First, in order to manufacture artificial turf pile yarn (10), a yarn masterbatch, a pigment masterbatch, and a heat-insulating masterbatch are each manufactured.

[0040] The above yarn masterbatch is basically manufactured by melt-extruding polyethylene resin, and additives including light stabilizers, antioxidants, superabsorbent resins, etc., may be further added as needed.

[0041] As an example of the above additive, a light stabilizer may be used by mixing one or more selected from the group consisting of benzophenone, benzotriazole, and hinderedamine.

[0042] In particular, when manufacturing the yarn masterbatch of the present invention, when using a hindered amine-based light stabilizer, it is preferable to use Chimassorb (registered trademark) 944FDL, Chimassorb 2020FDL, etc. for compatibility with polyethylene resin, but it is not necessarily limited thereto.

[0043] In addition, as another example of the above-mentioned additive, an antioxidant can be used to prevent the artificial turf from deteriorating due to heat and to improve heat resistance, and a conventional antioxidant can be used.

[0044] In addition, as another example of the additive mentioned above, a superabsorbent resin can be used, as it can increase the temperature reduction effect by generating heat of vaporization due to moisture absorption through its characteristic of being able to absorb moisture and expand.

[0045] By adding and mixing the aforementioned compositions according to the composition ratios, placing the mixed mixture into a twin-screw mixer, melting and extruding it at 250°C, and then cooling it underwater to cut it into pellets, a yarn masterbatch in which the aforementioned compositions are appropriately mixed and dispersed can be manufactured.

[0046] The pigment masterbatch is manufactured by mixing 35-45% by weight of polyethylene resin, 8-15% by weight of polyethylene wax, 27-37% by weight of yellow pigment, 3-10% by weight of green pigment, 1-3% by weight of black pigment, 0.5-2% by weight of antioxidant, and 8-13% by weight of light stabilizer, and then melt-extruding.

[0047] The polyethylene wax used in the manufacture of the pigment masterbatch described above is added to enhance the texture and mixability of the yellow, green, and black pigments added together during the manufacture of the pigment masterbatch, thereby enabling each pigment to be properly mixed into the polyethylene resin.

[0048] It is preferable to understand that the yellow pigment, green pigment, and black pigment used in the manufacture of the above pigment masterbatch are added to form the color of the artificial turf pile yarn having heat-insulating performance according to the present invention into a light green or green hue similar to natural grass.

[0049] It is preferable to understand that the antioxidant used in the manufacture of the above pigment masterbatch prevents the artificial turf from degrading due to heat and improves heat resistance, and that conventional antioxidants may be used.

[0050] The light stabilizer used in the manufacture of the above pigment masterbatch may be used by mixing one or more selected from the group consisting of benzophenone-based, benzotriazole-based, and hinderedamine-based light stabilizers. Preferably, when using a hinderedamine-based light stabilizer, using Chimassorb (registered trademark) 944FDL, Chimassorb 2020FDL, etc., can increase the compatibility with polyethylene resin, but is not necessarily limited thereto.

[0051] The heat-insulating masterbatch is manufactured by melt-extruding a heat-insulating mixture comprising 84-94 wt% polyethylene resin, 5-15 wt% boron nitride, 0.1-0.5 wt% boron nitride nanotubes, and 0.3-1.0 wt% dispersant.

[0052] The hexagonal boron nitride (h-BN) constituting the above thermal insulation masterbatch is also known as 'white graphite' and has a hexagonal crystal structure similar to graphite, making it an ideal composition for heat dissipation and high-temperature insulation. Such hexagonal boron nitride can be used in an amount of 5 to 15 weight percent.

[0053] At this time, when using hexagonal boron nitride with a size of less than 70 nm, there is a problem that the dispersibility improves but the heat dissipation performance decreases, and when using hexagonal boron nitride with a size exceeding 90 nm, there is a problem that the dispersibility decreases and the thermal insulation effect decreases as the inter-particle spacing widens, so it is desirable to use a material with a size of 70 to 90 nm.

[0054] The boron nitride nanotubes (BNNT) constituting the above thermal insulation masterbatch are a composition that possesses mechanical properties, thermal conductivity, and thermal expansion properties similar to carbon nanotubes (CNT), while also possessing ceramic properties, and exhibits excellent thermal and chemical stability. Such boron nitride nanotubes can be used in an amount of 0.1 to 0.5 weight percent.

[0055] At this time, when using boron nitride nanotubes (BNNT) with a size of less than 8 nm, there is a problem where the particles clump together, hindering heat transfer or reducing mechanical properties, and when using hexagonal boron nitride with a size exceeding 12 nm, there is a problem where dispersibility decreases and performance deteriorates due to the tube structures becoming entangled or clogged during the processing process, so it is desirable to use a material with a size of 8 to 12 nm.

[0056] The dispersant used in the manufacture of the above-mentioned heat-insulating masterbatch is an additive added to uniformly disperse and stabilize the particles, and is a composition capable of enabling the aforementioned boron nitride and boron nitride nanotubes to be uniformly dispersed within the polyethylene resin. Such a dispersant may be used in an amount of 0.3 to 1.0 weight percent.

[0057] By adding and mixing the aforementioned compositions according to the composition ratios, placing the mixed heat-insulating mixture into a twin-screw mixer, melting and extruding it at 250°C, and then cooling it underwater to cut it into pellets, a heat-insulating masterbatch in which the above compositions are appropriately mixed and dispersed can be manufactured.

[0058] FIG. 2 is a cross-sectional view illustrating an artificial turf structure (1) according to one embodiment of the present invention, and FIG. 3 is an exploded view illustrating an artificial turf structure (1) according to one embodiment of the present invention broken down into constituent layers.

[0059] Hereinafter, the artificial turf structure (1) having heat-insulating performance according to the present invention will be described in detail with reference to the detailed description of the artificial turf pile yarn (10) described above and FIGS. 2 and 3.

[0060] In order to construct the aforementioned artificial turf structure (1), the present invention may first manufacture an artificial turf mat (2).

[0061] An artificial turf mat (2) can be manufactured by forming a bubble layer (20) through a conventional bubble sheet and tufting an artificial turf pile yarn (10) having heat insulation performance on the upper surface of the bubble layer (20).

[0062] The artificial turf structure (1) may be composed of an artificial turf mat (2), a silica sand layer (30), a filler layer (40), a back coating layer (50), and a drainage plate (60).

[0063] Referring to FIG. 2, the artificial turf structure (1) may be configured by sequentially stacking a drainage plate (60), a back coating layer (50), a bubble layer (20), a silica sand layer (30), and a filler layer (40) that are placed on the upper surface of the ground (100) based on the ground (100).

[0064] At this time, the ground (100) is preferably formed by compacting soil or sand on a gravel layer to form a base layer for artificial turf construction, but is not necessarily limited thereto, and it should be understood that the ground (100) may be a concrete plate or a flooring material such as a wooden floor depending on the characteristics of the space for construction.

[0065] The above-mentioned bubble layer (20) is a part that fixes the artificial turf pile yarn (10) and may be composed of a polyolefin-based material, and the bubble sheet forming the above-mentioned bubble layer (20) may be formed of polyester, polypropylene, or a mixture thereof, and may be permeable.

[0066] In addition, the artificial turf pile yarn (10) that is tufted onto the above-mentioned air bubble layer (20) can be tufted as the original pile yarn, or the tufting can be performed after manufacturing it into the form of an artificial turf pile formed by weaving a plurality of artificial turf pile yarns (10).

[0067] The above back coating layer (50) can be formed on the lower surface of the bubble layer (20) on which the artificial turf pile yarn (10) is tufted. This back coating layer (50) can serve to support the artificial turf pile yarn (10) tufted in the bubble layer (20) so that it does not separate or detach from the bubble layer (20) by coating a polymer resin on the lower surface of the bubble layer (20).

[0068] In addition, the polymer resin forming the back coating layer (50) may be one or more selected from the group consisting of polyethylene resin, polyester, polyamide, and mixtures thereof. Additionally, thermoplastic elastomer (TPE) and thermoplastic polyolefin (TPO) may be used.

[0069] Additionally, the back coating layer (50) may be formed on the lower surface of the air bubble layer (20) on which the artificial turf pile yarn (10) is tufted by a dry heat fusion method or by a latex coating method, but is not limited thereto.

[0070] The above silica sand layer (30) may be formed by laying it on top of the air bubble layer (20) to a predetermined height. Specifically, the above silica sand layer (30) may include dry silica sand made of sand. Since silica sand is characterized by having a high specific gravity, being heavy, having low wear, good resilience, and generating little dust, it may be laid on top of the artificial turf mat to a thickness greater than a certain thickness when installing the artificial turf mat.

[0071] In addition, the silica sand layer (30) is not limited in composition and particle size, but it is preferable that the silica sand particle size of the silica sand layer (30) be 0.3 mm to 1.0 mm and the height (thickness) of the silica sand layer (30) be 15 mm to 30 mm.

[0072] The above-mentioned filler layer (40) may be formed by laying it on top of the silica sand layer (30) at a predetermined height to provide cushioning to the artificial turf structure (1). The filler (elastic chip) used in the filler layer (40) is mainly filled with elastic synthetic rubber chips. The rubber chips may be formed into particle shapes with a diameter of 1.4 to 3.35 mm to improve drainage and strengthen cushioning. The rubber chips may be manufactured including rubber, SEBS, EPDM, heat-insulating pigments, and other additives.

[0073] It is preferable that this filler layer (40) be formed with a height (thickness) of 15 mm to 30 mm, which is the same height as the aforementioned silica sand layer (30).

[0074] In addition, as another embodiment of the present invention, the silica sand layer (30) and the filler layer (40) may not be laid separately as separate base layers, but may be laid as a single base layer by mixing the silica sand layer (30) and the filler layer (40) according to the need or use.

[0075] The above drainage plate (60) can be formed by being combined with the lower surface of the bubble layer (20) and the lower surface of the back coating layer (50). At this time, any drainage plate (60) that is applied to a conventional artificial turf structure can be used.

[0076] In addition, the drainage plate (60) is formed on the upper side of the ground (100) and on the lowest layer of the artificial turf structure (1) to absorb impact acting on the artificial turf structure (1), and is formed in a grid shape or a shape with multiple pore holes to enable drainage, thereby improving drainage and allowing for smooth drainage, so that the silica sand layer (30) and the filler layer (40) laid on the upper side of the bubble layer (20) can be prevented from being swept away and damaged by water.

[0077] Hereinafter, a method for manufacturing an artificial turf pile yarn having heat-insulating performance according to an embodiment of the present invention will be described in detail with reference to the detailed description of the artificial turf pile yarn described above and Fig. 1.

[0078] The method for manufacturing an artificial turf pile yarn having heat-insulating performance according to the present invention comprises a yarn masterbatch manufacturing step for manufacturing a yarn masterbatch, a pigment masterbatch manufacturing step for manufacturing a pigment masterbatch, a heat-insulating masterbatch manufacturing step for manufacturing a heat-insulating masterbatch, and a yarn masterbatch, pigment masterbatch, and heat-insulating masterbatch manufactured in each masterbatch manufacturing step mixed in a predetermined ratio and then melted and extruded to produce an artificial turf pile yarn (10) in the artificial turf pile yarn manufacturing step.

[0079] In the above yarn masterbatch manufacturing step, a yarn masterbatch made of polyethylene resin can be prepared. This yarn masterbatch may consist purely of polyethylene resin, but if necessary, a mixture in which a separate additive is mixed with polyethylene resin can be placed in a twin-screw mixer and kneaded, then melt-extruded at 250°C, cooled underwater, and cut into pellet form to manufacture the yarn masterbatch. That is, the yarn masterbatch manufacturing step is a step of manufacturing and preparing a yarn masterbatch to be used therein in order to manufacture an artificial turf pile yarn (10) having heat-insulating performance.

[0080] After the above yarn masterbatch manufacturing step is performed, a pigment masterbatch manufacturing step for manufacturing a pigment masterbatch may be performed.

[0081] Here, it is preferable to understand that the pigment masterbatch manufacturing step is not a linear structure manufactured following the yarn masterbatch manufacturing step, but may be performed simultaneously with the yarn masterbatch manufacturing step and the heat-insulating masterbatch manufacturing step described later.

[0082] The above pigment masterbatch manufacturing step is a step of manufacturing and preparing a pigment masterbatch to be used therein in order to manufacture an artificial turf pile yarn (10) having heat-insulating performance.

[0083] The above pigment masterbatch manufacturing step first involves mixing 35-45% by weight of polyethylene resin, 8-15% by weight of polyethylene wax, 27-37% by weight of yellow pigment, 3-10% by weight of green pigment, 1-3% by weight of black pigment, 0.5-2% by weight of antioxidant, and 8-13% by weight of light stabilizer. At this time, it should be understood that the mixing ratio of the yellow pigment, green pigment, and black pigment may be adjusted by using pigments of different colors or by varying the mixing ratio depending on the desired color of the artificial turf pile yarn.

[0084] Subsequently, a mixture of polyethylene resin, polyethylene wax, pigment, antioxidant, and light stabilizer is fed into a twin-screw mixer and melt-extruded at 250°C, and then cooled underwater and cut into pellets to manufacture and prepare a pigment masterbatch.

[0085] After the pigment masterbatch manufacturing step for manufacturing the above pigment masterbatch is performed, the heat insulation masterbatch manufacturing step for manufacturing the heat insulation masterbatch may be performed.

[0086] Here, it should be understood that the heat-insulating masterbatch manufacturing step is not a linear structure that follows the yarn masterbatch manufacturing step or the pigment masterbatch manufacturing step as described above, but may be manufactured simultaneously.

[0087] The above heat-insulating masterbatch manufacturing step is a step of manufacturing and preparing a heat-insulating masterbatch to be used therein in order to manufacture an artificial turf pile yarn (10) having heat-insulating performance.

[0088] The above heat-insulating masterbatch manufacturing step first involves mixing 84-94% by weight of polyethylene resin, 5-15% by weight of hexagonal boron nitride, 0.1-0.5% by weight of boron nitride nanotubes, and 0.3-1.0% by weight of a dispersant to prepare a heat-insulating mixture.

[0089] Subsequently, the heat-insulating mixture mixed with the above-mentioned mixing ratio is fed into a twin-screw mixer and melt-extruded at 250°C, and then cooled underwater and cut into pellets to manufacture and prepare a heat-insulating masterbatch.

[0090] In the manufacturing step of the thermal insulation masterbatch, it is preferable to use a material with a size of 70 to 90 nm or less for the hexagonal boron nitride and a material with a size of 8 to 12 nm or less for the boron nitride nanotubes.

[0091] After the yarn masterbatch, pigment masterbatch, and heat-insulating masterbatch are prepared through the yarn masterbatch manufacturing step or the heat-insulating masterbatch manufacturing step described above, an artificial turf pile yarn manufacturing step may be performed. This artificial turf pile yarn manufacturing step is a step of manufacturing artificial turf pile yarn (10) by mixing the yarn masterbatch, pigment masterbatch, and heat-insulating masterbatch.

[0092] The above artificial turf pile yarn manufacturing step involves mixing and melting 92-98% by weight of yarn masterbatch, 1-5% by weight of pigment masterbatch, and 1-5% by weight of heat-insulating masterbatch and feeding them into an extruder; when the mixture is extruded into a film by the extruder, the extruded product is stretched to manufacture it in the form of a pile yarn.

[0093] That is, through the artificial turf pile yarn manufacturing step, an artificial turf pile yarn (10) using a yarn masterbatch, a pigment masterbatch, and a heat-insulating masterbatch can be manufactured, thereby enabling the manufacture of an artificial turf pile yarn (10) having heat-insulating performance.

[0094] Hereinafter, a method for manufacturing an artificial turf pile yarn having the aforementioned heat-insulating performance and a method for manufacturing an artificial turf structure having heat-insulating performance will be described in detail with reference to FIG. 1.

[0095] The method for manufacturing an artificial turf structure having heat-insulating performance according to the present invention comprises: a first step of tufting artificial turf pile yarn (10) onto a bubble layer (20); a second step of forming a back coating layer (50) by coating a polymer resin on the lower surface of the bubble layer (20); a third step of attaching a drainage plate (60) to the lower surface of the back coating layer (50); and a fourth step of laying a silica sand layer (30) and a filler layer (40) to a predetermined height on the upper surface of the bubble layer (20).

[0096] Step 1 is the step of tufting the artificial turf pile yarn (10) having heat-insulating performance, manufactured through the method for manufacturing artificial turf pile yarn having heat-insulating performance described above, onto the upper part of the bubble layer (20).

[0097] That is, step 1 is the step of manufacturing and preparing an artificial turf mat (2) by tufting and bonding the artificial turf pile yarn (10) to the air layer (20).

[0098] In this step, each of the plurality of artificial turf pile yarns (10) can be directly tufted onto the upper part of the air bubble layer (20), or the plurality of artificial turf pile yarns (10) can be woven together to form an artificial turf pile, and then the artificial turf pile can be tufted onto the upper part of the air bubble layer (20).

[0099] In this way, after the first step of manufacturing the artificial turf mat (2) is completed, the second step can be carried out.

[0100] Step 2 is a step of forming a back coating layer (50) by coating a polymer resin on the lower surface of the air bubble layer (20) of the artificial turf mat (2) manufactured through Step 1.

[0101] By forming a back coating layer (50) on the lower surface of the bubble layer (20) through this step, the artificial turf pile yarn (10) and pile are prevented from detaching from the bubble layer (20) of the manufactured artificial turf mat (2), thereby enabling the manufacture of a more robust artificial turf mat (2).

[0102] After the back coating layer (50) is formed on the lower surface of the bubble layer (20) through step 2, step 3 can be performed.

[0103] Step 3 is the step of attaching a drainage plate (60) to the lower part of the back coating layer (50).

[0104] In this step, adhesive may be applied to the lower part of the bubble layer (20) and the upper surface of the drainage plate (60) in order to attach the drainage plate (60) to the lower part of the back coating layer (50).

[0105] Accordingly, the drainage plate (60) can be attached to the lower part of the back coating layer (50) on which the adhesive is laid, or the upper surface of the drainage plate (60) on which the adhesive is laid can be attached to the lower part of the back coating layer (50) to attach the drainage plate (60) to the artificial turf mat (2).

[0106] In this way, by combining the drainage plate (60) with the artificial turf mat (2), the shock absorption and drainage performance of the artificial turf structure (1) can be increased through the shock absorption and drainage performance of the drainage plate (60), thereby ultimately producing an effect that increases durability.

[0107] In addition, once the artificial turf mat (2) is prepared through this step, the artificial turf mat (2) can be installed on the upper part of the ground (100) to perform the 4th step described later.

[0108] Step 4 is the step of laying a silica sand layer (30) and a filler layer (40) on top of the air bubble layer (20) of the artificial turf mat (2) after installing the artificial turf mat (2) prepared through Step 3 on the ground (100).

[0109] In this step, as described above, the silica sand layer (30) is formed by laying silica sand with a particle size of 0.3 mm to 1.0 mm to a height (thickness) of 15 mm to 30 mm, and

[0110] The filler layer (40) can be formed by laying a filler formed in the shape of particles with a diameter of 1.4 to 3.35 mm on top of the silica sand layer (30) to a height (thickness) of 15 mm to 30 mm, which is the same height as the silica sand layer (30).

[0111] In addition, at this stage, the silica sand layer (30) and the filler layer (40) may be mixed and laid as a single base layer as described above.

[0112] The above description is based on the drawings of the present invention, but is not limited to the parts described based on the drawings. Various modifications can be made within the scope of the gist of the present invention in the technical field to which the present invention belongs, without departing from the parts described based on the drawings. Explanation of the symbols

[0113] 1: Artificial turf structure 10: Artificial turf pile yarn 20: Air layer 30: Silica sand layer 40: Filler layer 50: Back coating layer 60: Drainage plate 100: Surface

Claims

Claim 1 An artificial turf pile yarn having heat-insulating performance, characterized by being manufactured by melt-extruding a mixture of 92-98% by weight of a yarn masterbatch made of polyethylene resin, 1-5% by weight of a pigment masterbatch, and 1-5% by weight of a heat-insulating masterbatch, wherein the heat-insulating masterbatch is manufactured by melt-extruding a mixture of 84-94% by weight of polyethylene resin, 5-15% by weight of hexagonal boron nitride with a size of 70-90 nm, 0.1-0.5% by weight of boron nitride nanotubes with a size of 8-12 nm, and 0.3-1.0% by weight of a dispersant. Claim 2 The artificial turf pile yarn having heat-insulating performance according to claim 1, wherein the pigment masterbatch is manufactured by melt-extruding a pigment mixture comprising 35-45% by weight of polyethylene resin, 8-15% by weight of polyethylene wax, 27-37% by weight of yellow pigment, 3-10% by weight of green pigment, 1-3% by weight of black pigment, 0.5-2% by weight of antioxidant, and 8-13% by weight of light stabilizer. Claim 3 delete Claim 4 The artificial turf pile yarn having heat-insulating performance according to claim 1, wherein the heat-insulating masterbatch is manufactured by melt-extruding the heat-insulating mixture at 250°C using a twin-screw kneader, cooling it underwater, and cutting it into a pellet shape. Claim 5 An artificial turf mat having heat-insulating performance, characterized in that the artificial turf pile yarn having heat-insulating performance described in any one of claims 1, 2, and 4 above is tufted onto the upper surface of the air bubble layer. Claim 6 An artificial turf structure having heat-insulating performance, characterized by comprising: an artificial turf mat manufactured according to claim 5 above; a silica sand layer laid at a predetermined height on top of the air bubble layer; and a filler layer laid at a predetermined height on top of the silica sand layer. Claim 7 An artificial turf structure having heat-insulating performance, characterized in that, in claim 6, a drainage plate is further provided below the air bubble layer of the artificial turf mat. Claim 8 An artificial turf structure having heat-insulating performance, characterized in that, in claim 7, a plurality of pore holes are formed in the drainage plate. Claim 9 An artificial turf structure having heat-insulating performance, characterized in that, in claim 7, a back coating layer coated with a polymer resin is further provided on the lower surface of the air bubble layer of the artificial turf mat. Claim 10 A yarn masterbatch manufacturing step for manufacturing a yarn masterbatch made of polyethylene resin; a pigment masterbatch manufacturing step for manufacturing a pigment masterbatch by melt-extruding a pigment mixture comprising 35-45 wt% polyethylene resin, 8-15 wt% polyethylene wax, 27-37 wt% yellow pigment, 3-10 wt% green pigment, 1-3 wt% black pigment, 0.5-2 wt% antioxidant, and 8-13 wt% light stabilizer; a heat-insulating masterbatch manufacturing step for manufacturing a heat-insulating masterbatch by melt-extruding a mixture comprising 84-94 wt% polyethylene resin, 5-15 wt% hexagonal boron nitride with a size of 70-90 nm, 0.1-0.5 wt% boron nitride nanotubes with a size of 8-12 nm, and 0.3-1.0 wt% dispersant; and 92-98 wt% of the yarn masterbatch, A method for manufacturing an artificial turf pile yarn having heat-insulating performance, characterized by including: a step of manufacturing an artificial turf pile yarn by mixing 1 to 5 weight% of a pigment masterbatch and 1 to 5 weight% of a heat-insulating masterbatch, and then melt-extruding to manufacture an artificial turf pile yarn. Claim 11 delete Claim 12 A method for manufacturing an artificial turf structure having heat-insulating performance, characterized by comprising: a first step of tufting an artificial turf pile yarn manufactured by the method for manufacturing an artificial turf pile yarn having heat-insulating performance described in claim 10 into a foam layer; a second step of forming a back coating layer by coating a polymer resin on the lower surface of the foam layer; a third step of attaching a drainage plate to the lower surface of the back coating layer; and a fourth step of laying a silica sand layer and a filler layer to a predetermined height on the upper surface of the foam layer.

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