Artificial turf structure having excellent antibacterial, impact-absorbing and drainage properties and method for manufacturing same

Abstract

The present invention relates to an artificial turf pile yarn, an artificial turf structure, and a method for manufacturing same. According to the present invention, an artificial turf structure having excellent antibacterial, impact-resistant, and drainage properties can be provided by adding antibacterial materials to an artificial turf pile yarn and applying an impact-absorbing drain plate having excellent impact-resistant and drainage properties.

Description

Artificial grass structure with excellent antibacterial properties, shock absorption, and drainage properties and method for manufacturing the same

[0001] The present invention relates to an artificial turf structure having excellent antibacterial properties, shock absorption properties, and drainage properties, and a method for manufacturing the same.

[0002]

[0003] Artificial turf was developed primarily for use in areas where natural lighting is limited or climate conditions make it difficult for natural grass to grow. While initial construction costs are higher than for natural grass, its ease of maintenance and smooth surface make it increasingly popular for use as a sports ground, even in areas where natural grass can thrive.

[0004] Drainage is a crucial factor when using artificial turf. If drainage is inadequate during rain, water can pool on the artificial turf piles, posing a risk of slipping and injury. Furthermore, the durability of the turf can be reduced, resulting in significant financial costs. Furthermore, water can accumulate inside and around the drainage panels used during artificial turf installation, creating an environment ripe for microbial growth. This, in turn, can lead to the proliferation of bacteria and insects, resulting in unpleasant odors.

[0005] Furthermore, artificial turf fields are prone to contamination due to human sweat, pet excrement, and contaminants from beverages and other substances resulting from intense exercise. To prevent the spread of pathogens caused by these contaminants and ensure ongoing hygiene, it's crucial to add a complex antimicrobial agent to the turf pile during the manufacturing process to maintain a pleasant environment.

[0006] However, most of the current developments in artificial turf are attempts to lower the friction temperature or reduce the rigidity of the pile by manufacturing the pile with soft synthetic resin to maintain the same performance as natural artificial turf, and functional processing to maintain antibacterial or sterilizing functions in artificial turf is insufficient.

[0007] Accordingly, the present invention aims to develop an artificial turf with antibacterial or sterilizing properties beneficial to humans and pets, thereby providing convenience and comfort in use, and to develop an artificial turf structure with an antibacterial function that can suppress microbial growth by developing a shock-absorbing drainage plate with excellent shock absorption and drainage properties.

[0008]

[0009] The inventors of the present invention confirmed that an artificial turf pile containing paeonol and zinc oxide exhibited excellent antibacterial effects against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Furthermore, by arranging pores in a V-shape on the upper and lower surfaces of the drainage plate, they confirmed that the pile had excellent shock absorption, elasticity (elongation), and durability (tensile strength), thereby completing the present invention.

[0010] Accordingly, the present invention has as a specific problem to be solved the problem of providing an antibacterial artificial grass pile.

[0011] In addition, the present invention specifically aims to provide an artificial turf structure including a pile made of the above-mentioned antibacterial artificial turf pile yarn.

[0012] In addition, the present invention has as a specific problem to be solved a method for manufacturing the antibacterial artificial grass pile yarn.

[0013] Furthermore, the present invention has as a specific problem to be solved a method for manufacturing an artificial grass structure to which the above-mentioned antibacterial artificial grass pile is applied.

[0014]

[0015] The following describes this specification in more detail.

[0016] This is specifically explained as follows. Meanwhile, each description and embodiment disclosed in the present invention can also be applied to other descriptions and embodiments thereof. In other words, all combinations of the various elements disclosed in the present invention fall within the scope of the present invention. Furthermore, the scope of the present invention is not limited by the specific descriptions described below.

[0017] Expressions such as “comprising” as used herein should be understood as open-ended terms implying the possibility of including other embodiments, unless specifically stated otherwise in the phrase or sentence in which the expression is included.

[0018] The terms or words used in the description and claims of the present invention should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0019]

[0020] Artificial grass pile

[0021] The present invention provides an antibacterial artificial grass pile comprising 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of a light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a composite antibacterial agent composed of phenol and zinc oxide.

[0022] The antibacterial artificial grass pile of the present invention comprises 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a composite antibacterial agent composed of phenol and zinc oxide.

[0023] The polyethylene resin constituting the above artificial grass pile can be used in an amount of 77 to 96 wt% and has a density of 0.91 to 0.97 g / cm 3and the melt index (MI) is 5 to 15 g / 10 min.

[0024] The above light stabilizer may be any one selected from the group consisting of benzophenone, benzotriazole, and hindered amine, but is not limited thereto.

[0025] In addition, the light stabilizer may be used in an amount of 1 to 10 wt%, and a hindered amine light stabilizer may be used. Examples of the hindered amine light stabilizer include, but are not limited to, Chimassorb (registered trademark) 944FDL, Chimassorb 2020FDL, etc.

[0026] The above calcium carbonate can be used in amounts of 1 to 5 wt% and can be used to increase the weight of the plait yarn. Furthermore, when used in small amounts, it prevents blocking and facilitates the supply of plait yarn in the subsequent knitting process.

[0027] The above complex antibacterial agent is a complex antibacterial agent composed of paeonol and zinc oxide, which can be used in an amount of 2 to 8 wt%. Paeonol is a natural antibacterial agent isolated from peony bark.

[0028] The above-mentioned composite antibacterial agent may be a mixture of paeonol isolated from peony bark and zinc oxide in a weight ratio of 0.3 to 5:1.

[0029] Additionally, it may further include one or more functional additives consisting of pigments, flame retardants, antioxidants, and anti-aging agents.

[0030] The above functional additive may be included in an amount of 0.1 to 10 wt%. If the content of the functional additive is less than 0.1 wt%, the effect is minimal, and if it exceeds 10 wt%, there is a problem in that the additives are not properly mixed and dimensional stability is reduced.

[0031] The above pigment is not limited to those that can give artificial grass the same color as natural grass, but yellow pigment, green pigment, and black pigment can be mixed and used within an appropriate range to give color.

[0032] The above flame retardant may be any one selected from the group consisting of phosphorus-based flame retardants, metal hydrate-based flame retardants, halogen-based flame retardants, flame retardant aids, and mixtures thereof, but is not limited thereto.

[0033] The above antioxidant prevents the artificial turf from being deformed by heat and improves heat resistance, and a typical antioxidant can be used.

[0034] The above-mentioned anti-aging agent is intended to prevent the artificial turf from aging due to solar heat, and a conventional anti-aging agent can be used.

[0035] The above artificial grass pile has an antibacterial effect, and is particularly effective against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa.

[0036]

[0037] artificial grass structure

[0038] The present invention provides an artificial turf structure comprising a foam layer, an artificial turf pile tufted on the foam layer and composed of the artificial turf pile yarn, and a support layer formed by coating a polymer resin on the lower surface of the foam layer.

[0039] Figure 1 illustrates a construction cross-section of an artificial turf structure of the present invention. The artificial turf structure (100) of the present invention has a structure in which a drainage plate (20), an adhesive layer (30), a support layer (40), a foam layer (50), a filler layer (60), and an artificial turf pile (70) are sequentially laminated on the upper surface of the ground (10) based on the ground (10).

[0040] At this time, the ground (10) is typically formed by compacting soil or sand on a gravel layer to form a foundation layer for artificial turf construction. In addition, according to the present invention, the ground (10) may be constructed using concrete or wood, depending on the characteristics of the space for construction.

[0041] The artificial grass structure of the present invention comprises a foam layer, an artificial grass pile tufted on the foam layer and formed by processing an artificial grass pile yarn of the aforementioned composition, and a support layer formed by coating a polymer resin on the lower surface of the foam layer.

[0042] The above foam layer (50) is a part that fixes the artificial grass pile (70), and may be composed of a polyolefin-based material. The foam material forming the foam layer (50) is formed of polyester, polypropylene, or a mixture thereof, and may be made water permeable.

[0043] An artificial grass pile (70) is tufted on the above foam layer (50).

[0044] The above artificial grass pile (70) is manufactured by processing the artificial grass pile yarn of the above-described composition.

[0045] The above support layer (40) can be formed on the lower surface of the foam layer (50) on which the artificial turf pile (70) is tufted, and serves to support the foam layer (50). The polymer resin forming the support layer (40) can be at least one selected from the group consisting of polyethylene, polyester, polyamide, and mixtures thereof. In addition, thermoplastic elastomer (TPE) and thermoplastic polyolefin (TPO) can be used.

[0046] The above support layer (40) may be formed on the lower surface of the foam layer (50) on which artificial turf piles are tufted by a dry heat fusion method or by a latex coating method, but is not limited thereto. In addition, a silica layer may be formed on the upper surface of the foam layer (50), and the silica layer may include silicon dioxide (SiO2) and may have a particle size of approximately 0.3 to 1.0 mm, but is not limited thereto. In addition, the thickness of the silica layer may be formed to be approximately 15 to 30 mm.

[0047] In addition, as shown in FIG. 1 of the present invention, the artificial turf structure (100) may include a filler layer (60) made of a filler on the upper surface of the silica sand layer when the foam layer (50) or silica sand layer is installed to provide cushioning. The filler layer (60) may be formed in a particle shape of 1.4 to 3.35 mm to improve drainage and strengthen cushioning.

[0048] In addition, the artificial grass structure may further include an adhesive layer connecting the lower surface of the support layer and the upper surface of the drainage plate; and a drainage plate attached to the lower surface of the adhesive layer.

[0049] In order to connect the lower surface of the support layer (40) and the upper surface of the drain plate (20), an adhesive layer (30) made of an adhesive may be formed on the lower surface of the support layer (40). By attaching the upper surface of the drain plate (20) to the lower surface of the adhesive layer (30), the drain plate (20) is firmly combined. When forming the adhesive layer (30) on the lower surface of the support layer (40), it is important to form the adhesive layer (30) only on the edge portion rather than on the entire area of ​​the lower surface of the support layer (40) so that the pore holes (230) of the drain plate (20) are not covered.

[0050] In addition, the upper surface of the drain plate (20) is attached to the lower surface of the adhesive layer (30) so that it does not separate due to a load. At this time, it is sufficient if the edge portion (outer portion) of the drain plate (20) is combined with the support layer (40) so that the pores (230) of the drain plate (20) are not blocked by the adhesive layer (30).

[0051] The adhesive constituting the above adhesive layer (30) is for bonding the support layer (40) and the drainage plate (20), and a conventional adhesive can be used.

[0052] The above drain plate has a plurality of air holes formed in a first horizontal member on the upper surface of the drain plate and a second horizontal member on the lower surface of the drain plate, and the plurality of air holes can be arranged in a V shape, and has a structure in which a plurality of V shapes are repeated.

[0053] In addition, the drain plate may include a plurality of ventilation layers and a support member connecting each ventilation layer, and the ventilation layers may include a first horizontal member formed on an upper surface of the drain plate, a second horizontal member formed on a lower surface of the drain plate, a first vertical member connecting one side of the first horizontal member and one side of the second horizontal member, and a second vertical member connecting the other side of the first horizontal member and the other side of the second horizontal member.

[0054] Figure 2 illustrates the upper surface (21) of the drain plate of the present invention.

[0055] Figure 4 is an enlarged view of the ventilation layer (250) and support portion (260) of the drain plate of the present invention.

[0056] The above drain plate (20) includes a first connecting portion (210), a second connecting portion (220), a porous hole (230), a guide groove (240), a ventilation layer (250), and a support portion (260). The drain plate (20) has a plurality of ventilation layers (250) and support portions (260) arranged in series, and the first connecting portion (210) is positioned on one side of the drain plate (20) and the second connecting portion (220) is positioned on the other side. Since there is a ventilation layer (250), drainage and air flow are smooth.

[0057] The artificial turf structure (100) of the present invention has a structure including a plurality of ventilation layers (250) in the shape of a drainage plate (20) and a support member (260) connecting each ventilation layer (250), absorbs shocks, and ensures smooth vertical drainage and air flow through a plurality of air holes (230) formed in the ventilation layer (250), and when pressure (load) is applied from the top of the artificial turf pile (70), the shape of the ventilation layer (250) can be deformed to correspond to the load, thereby providing the effect of shock resistance.

[0058] The drainage plate (20) of the present invention has a tubular structure with excellent drainage properties, so there is no need to bury a separate civil engineering perforated pipe, making construction simple and reducing the cost of foundation installation when installing an artificial turf structure.

[0059] The support member (260) forming a cross structure distributes the horizontal load, and the ventilation layer (250) having a tubular structure serves as a sturdy structure that supports the load, so the drain plate (20) of the present invention has excellent strength and stability. The curved tubular structure has an elastic structure that reduces pressure, which is a disadvantage of a rectangular structure with corners, and thus has high restoring force. In addition, the cross structure of the support member (260) can secure space inside the guide groove (240), so that ventilation and drainage can be facilitated, thereby preventing contamination and odor.

[0060] The plurality of air holes (230) located on the upper surface of the above drain plate (20) are characterized by being arranged in a V shape. When the plurality of air holes (230) are arranged in a V shape, the durability is superior compared to a drain plate structure in which the plurality of air holes are arranged in a I shape parallel to the horizontal members (251, 252). When the plurality of air holes are arranged in a I shape parallel to the horizontal members (251, 252), the drain plate is easily damaged by being torn or burst due to a load (pressure).

[0061] The above drain plate (20) is a soft plastic molded body, and can be extruded into a composite material using polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), polyurethane (PU), polystyrene (SB), acrylonitrile butadiene styrene resin (ABS), polyamide (PA), polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or a mixture thereof as a main material, and to which a plasticizer is added to impart softness to the main material.

[0062] Figure 3 illustrates the lower surface (22) of the drain plate of the present invention.

[0063] Figure 4 is an enlarged view of the ventilation layer (250) and support portion (260) of the drain plate of the present invention.

[0064] The lower surface of the drain plate (20) also has air holes (230) formed in the second horizontal member (252) of the ventilation layer (250), thereby facilitating vertical drainage and air flow. The plurality of air holes (230) formed in the first horizontal member (251) and the second horizontal member (252) constituting the ventilation layer (250) are arranged in a vertically additivity manner so that vertical drainage is possible. Accordingly, the air holes (230) serve as passages for the inflow and outflow of water and / or air.

[0065] The above ventilation layer (250) has a tubular structure in a curved shape, including a first horizontal member (251) formed on the upper surface of the drain plate (20), a second horizontal member (252) formed on the lower surface, a first vertical member (253) connecting one side of the first horizontal member (251) and one side of the second horizontal member (252), and a second vertical member (254) connecting the other side of the first horizontal member (251) and the other side of the second horizontal member (252).

[0066] The thickness of the first horizontal member (251) and the second horizontal member (252) may be the same as or thinner than that of the first vertical member (253) and the second vertical member (254).

[0067] The first vertical member (253) and the second vertical member (254) above serve to support the ground by being compressed in a direction perpendicular to the ground against pressure applied from above. Since the first horizontal member (251) and the second horizontal member (252) have a thickness that is thinner or the same as that of the vertical members (253, 254), they can have elasticity and cushioning power by bending inwardly of the ventilation layer (250) against pressure from above.

[0068] The first horizontal member (251) and the second horizontal member (252) and the first vertical member (253) and the second vertical member (254) meet to form a plurality of ventilation layers (250). The plurality of ventilation layers (250) are respectively arranged at spaced apart positions. In addition, an air layer (255) is formed in the inner space of the ventilation layer (250). Like the ventilation layer (250), the air layer (255) is also formed in plurality and functions as a vertical drainage and a passage through which air can move. In addition, the air layer (255) formed in the inner space of the ventilation layer (250) serves to absorb and cushion impact against pressure applied from above.

[0069] The above support member (260) includes a horizontal support member (261) and a vertical support member (262). The support member (260) connects two ventilation layers (250) arranged at spaced locations. One side of the horizontal support member (261) is connected to a second vertical member (254), and the other side of the horizontal support member (261) is connected to a first vertical member (253) of a ventilation layer (250) arranged at an adjacent location. The vertical support member (262) supports while being compressed against a pressure (load) applied from above.

[0070] The above support member (260) has a structure in which a horizontal support member (261) and a vertical support member (262) intersect to form a cross, and serves to evenly distribute the load.

[0071]

[0072] In addition, the support member (260) is formed with a guide groove (240) between the horizontal support member (261) and the vertical support member (262) through which horizontal drainage and air movement can occur. Since the guide groove (240) is lower than the height of the first horizontal member (251) without a separate perforated discharge portion or air hole, drainage and air movement are possible. In addition, due to the surface gradient of the ground (10), flat / surface drainage is possible through the guide groove (240) formed between the cross structures of the support member (260).

[0073] The above guide groove (240) is a structure in which a horizontal support portion (261) is separated into two by a vertical support portion (262). If a perforated structure such as a hole is formed in the guide groove (240), the durability of the drain plate (20) is weakened and the elasticity is lowered. If a high pressure or load is applied to the drain plate (20) when the guide groove (240) has a perforated structure such as a hole, the restoring force is lowered, and the impact resistance and durability are weakened due to the perforated structure, so that the guide groove (240) of the drain plate (20) is torn or easily damaged.

[0074] The above drain plate (20) has a horizontal drainage function through the inner space of the ventilation layer (250) and the guide groove (240), and a vertical drainage function through the air holes (230). In addition, the inner space of the ventilation layer (250), the guide groove (240), and the air holes (230) of the drain plate (20) serve as air movement passages.

[0075] The artificial grass structure (100) of the present invention generates air flow by the movement of the drainage plate (20) when pressure is applied to the upper portion of the artificial grass pile (70), thereby quickly drying moisture in the drainage plate (20) and the artificial grass pile (70) above the drainage plate (20).

[0076] Figure 5 illustrates the connection structure of the drain plate of the present invention.

[0077] In addition, the drain plate has a first connection part (210) formed on one side and a second connection part (220) formed on the other side, and the drain plate (20) can be attached and detached in a male-female fastening structure so that a plurality of drain plates are connected in the width direction.

[0078] The first connecting portion (210) of the above drain plate (20) is formed on one side of the drain plate (20). The second connecting portion (220) is formed on the other side of the drain plate (20). A lower protrusion and an insertion groove are formed on the first connecting portion (210), and an upper protrusion and an insertion groove are formed on the second connecting portion (220), so that the first connecting portion (210) and the second connecting portion (220) can be attached and detached by forming a male-female fastening structure.

[0079] In addition, it can be implemented by modifying the structure in which an upper protrusion and an insertion groove are formed in the first connecting portion (210) and a lower protrusion and an insertion groove are formed in the second connecting portion (220).

[0080]

[0081] Method for manufacturing artificial grass piles

[0082] The present invention provides a method for producing an antibacterial artificial turf pile yarn, comprising the steps of: a first step of producing an antibacterial masterbatch for producing an antibacterial artificial turf pile yarn, comprising 77 to 96 wt% of a polyethylene resin, 1 to 10 wt% of a light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a composite antibacterial agent composed of phenol and zinc oxide; and a second step of extruding and stretching the antibacterial masterbatch into a film to produce a plate yarn.

[0083] Step 1 of the present invention is a step of manufacturing an antibacterial masterbatch for manufacturing an antibacterial artificial turf pile, which comprises 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of a light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a composite antibacterial agent composed of phenol and zinc oxide.

[0084] Step 1 of the present invention is a step of mixing 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a complex antibacterial agent composed of phenol and zinc oxide, and manufacturing it in the form of an antibacterial masterbatch for manufacturing antibacterial artificial turf pile.

[0085] In the present invention, the descriptions of the terms “polyethylene resin”, “light stabilizer”, “calcium carbonate”, and “composite antibacterial agent composed of phenol and zinc oxide” are as described above.

[0086] The above term "masterbatch" refers to a pellet-shaped raw material in which the basic plastic raw material and the additives to be added are concentrated and dispersed at a high concentration.

[0087] The present invention has the advantage of convenience in that it manufactures a mixture of raw materials constituting an antibacterial artificial turf pile in the form of a masterbatch, and then melts it when necessary to use it in the manufacture of an artificial turf pile.

[0088] The second step of the present invention is a step of extruding the antibacterial masterbatch into a film and stretching it to produce a flat yarn.

[0089] Specifically, the second step may include a step of melting the antibacterial masterbatch manufactured in the first step at 250 to 350°C and extruding it into a film; a step of stretching it at a stretching ratio of 1:5 to 15 at a speed of 80 m / min to 120 m / min at 95 to 120°C; and a step of manufacturing a flat yarn of 5,000 to 20,000 dtex (decitex).

[0090] First, the antibacterial masterbatch manufactured in the above step 1 can be melted and extruded at 250 to 350°C, specifically 280 to 320°C, using an extruder such as a T-die to form a film.

[0091] The above extruded film can be cooled to 25 to 40°C using a cooling tank or the like, and cut into an appropriate size using a slitter.

[0092] The above extruded film can be stretched at a stretching ratio of 1:5 to 15 at a speed of 80 m / min to 120 m / min at 95 to 120°C. If the stretching temperature is lower than 95°C, workability is poor, and if it exceeds 120°C, there is a problem that the dimensional stability of the produced pile yarn deteriorates, so the process can be performed within the above range. In addition, if the stretching ratio is lower than 5, dimensional stability deteriorates, and if it exceeds 15, not only does stretchability deteriorate, but the touch also becomes stiff, which is not preferable.

[0093] The above-mentioned stretched film can be used to produce a flat yarn of 5,000 to 20,000 dtex (decitex).

[0094] The above-mentioned stretched film can be further annealed at 80 to 120°C to produce a flat yarn of 5,000 to 20,000 dtex.

[0095] The above term "annealing" is a post-processing process performed to maintain the molded shape by heating the molded polymer molded product. This process is to prevent the molded product from being distorted due to rapid shrinkage or partial shrinkage during the crystallization process of the polymer particles that have been rapidly cooled.

[0096] The annealing process after the above drawing can be omitted, and after the drawing process, the yarn is wound on a winder to produce a flat yarn of 5,000 to 20,000 dtex.

[0097] The above-mentioned manufactured 2 to 12 strands of flat yarn, specifically 4 to 8 strands of flat yarn, are processed to manufacture artificial grass pile yarn.

[0098]

[0099] Method for manufacturing artificial turf structures

[0100] In addition, the present invention provides a method for manufacturing an artificial turf structure, comprising the steps of: a first step of tufting the manufactured artificial turf pile on a foam layer; a second step of coating a polymer resin on the lower surface of the foam layer to form a support layer; a third step of forming an adhesive layer on the lower surface of the support layer; and a fourth step of attaching the upper surface of a drainage plate to the lower surface of the adhesive layer.

[0101] The first step of the method for manufacturing an artificial turf structure of the present invention is a step of tufting artificial turf pile yarn into a foam layer.

[0102] The artificial grass pile manufactured by the above-described method is tufted onto the foam layer.

[0103] A specific description of the bubble layer (50) is as described above.

[0104] The second step of the method for manufacturing an artificial grass structure of the present invention is to form a support layer by coating a polymer resin on the lower surface of the foam layer.

[0105] The artificial grass pile (70) forms a support layer (40) by coating a polymer resin on the lower surface of the tufted foam layer (50), and a specific description of the support layer (40) is as described above.

[0106] The third step of the method for manufacturing an artificial grass structure of the present invention is a step of forming an adhesive layer on the lower surface of the support layer.

[0107] In this step, an adhesive layer (30) is formed on the lower surface of the support layer (40) so that the drain plate (20), which will be described later, is firmly attached so that it does not separate due to load. When forming the adhesive layer (30) on the lower surface of the support layer (40), it is important to form the adhesive layer (30) only on the edge portion rather than on the entire area of ​​the lower surface of the support layer (40) so that the pore holes (230) of the drain plate (20) are not covered.

[0108] The fourth step of the method for manufacturing an artificial grass structure of the present invention is a step of attaching the upper surface of the drainage plate to the lower surface of the adhesive layer.

[0109] The upper surface of the drain plate (20) is attached to the lower surface of the adhesive layer (30) so that it does not separate due to a load. At this time, it is sufficient if the edge (outer surface) of the drain plate (20) is joined to the support layer (40) so that the pores (230) of the drain plate (20) are not blocked by the adhesive layer (30).

[0110] Matters mentioned in the artificial grass pile yarn, artificial grass pile yarn manufacturing method, artificial grass structure, and artificial grass structure manufacturing method of the present invention are equally applicable unless they are contradictory.

[0111]

[0112] The artificial turf pile comprising paeonol and zinc oxide of the present invention exhibits excellent antibacterial effects against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Furthermore, by applying a drainage plate with V-shaped pores, the pile exhibits superior shock absorption and drainage properties compared to existing drainage plates, as well as superior elasticity and durability.

[0113] Therefore, the artificial turf structure of the present invention, including the artificial turf pile and the drainage plate with the pores arranged in a V shape, has excellent antibacterial and drainage properties, thereby inhibiting the growth of microorganisms. In addition, it has excellent durability, thereby inhibiting the generation of dust and dirt. Furthermore, its excellent elasticity and resilience minimize injuries even in the event of a fall during exercise.

[0114]

[0115] Figure 1 illustrates a construction cross-section of an artificial grass structure of the present invention.

[0116] Figure 2 illustrates the upper surface of the drain plate of the present invention.

[0117] Figure 3 illustrates the lower surface of the drain plate of the present invention.

[0118] Figure 4 is an enlarged view of the ventilation layer and support portion of the drain plate of the present invention.

[0119] Figure 5 illustrates the connection structure of the drain plate of the present invention.

[0120]

[0121] The present invention has been evaluated by applying it to various products, with reference to preferred embodiments, so that those skilled in the art can easily implement it. However, the present invention can be implemented in various different forms and is not limited to the embodiments described below.

[0122]

[0123] Example

[0124]

[0125] Example 1.

[0126] Polyethylene resin (density 0.92 g / cm) 3 , melting index 10g / 10min), 91 wt% of a light stabilizer (hindered amine XT-847, BASF), 3 wt% of CaCO3, 3.5 wt% of paeonol isolated from peony bark, and 1.5 wt% of zinc oxide were mixed to prepare a masterbatch for producing antibacterial artificial turf pile yarn.

[0127] The above masterbatch was melted at 300°C using a T-die extruder and extruded into a film. The extruded film was cooled and cut using a slitter. Thereafter, the film was drawn at a draw ratio of 1:5 to 15 at a speed of 100 m / min at 95 to 120°C, producing 15,000 dtex plain yarn. Artificial turf pile yarn was produced using the above-produced plain yarn.

[0128]

[0129] Example 2

[0130] An artificial grass pile was manufactured in the same manner as in Example 1, except that 94 wt% of polyethylene resin and 0.5 wt% of phenol were used.

[0131]

[0132] Example 3

[0133] An artificial grass pile was manufactured in the same manner as in Example 1, except that 92 wt% of polyethylene resin and 2.5 wt% of phenol were used.

[0134]

[0135] Example 4

[0136] An artificial grass pile was manufactured in the same manner as in Example 1, except that 90 wt% of polyethylene resin and 4.5 wt% of phenol were used.

[0137]

[0138] Example 5

[0139] An artificial grass pile was manufactured in the same manner as in Example 1, except that 88 wt% of polyethylene resin and 6.5 wt% of phenol were used.

[0140]

[0141] Comparative Example 1.

[0142] An artificial grass pile was manufactured in the same manner as in Example 1, except that 94.5 wt% of polyethylene resin and 0 wt% of phenol were used.

[0143]

[0144] Comparative Example 2.

[0145] An artificial grass pile was manufactured in the same manner as in Example 1, except that 86 wt% of polyethylene resin and 8.5 wt% of phenol were used.

[0146]

[0147] IngredientsExample 1Comparative Example 1Example 2Example 3Example 4Example 5Comparative Example 2Polyethylene resin9194.59492908886Light stabilizer3333333CaCO31111111Phenol3.500.52.54.56.58.5Zinc oxide1.51.51.51.51.51.51.51.5Total100100100100100100100

[0148]

[0149] Experimental example

[0150]

[0151] Experimental Example 1. Antibacterial Test

[0152] An antibacterial test was conducted using the artificial grass piles manufactured in the comparative examples and examples based on the ASTM E 2149:2020 test method.

[0153] Escherichia coli (ATCC 25922) 1.2Х10 5 CFU / mL, Staphylococcus Aureus (ATCC 6538) 1.5Х10 5 CFU / mL, Klebslella pneuwonlaeATCC 4352 2.2Х10 5 CFU / mL, Pseudomonas aeruginosaATCC 15442 1.9Х10 5 CFU / mL was applied to the artificial turf piles manufactured in the examples and comparative examples using a wrist-action shaker for 24 hours, and the bacterial reduction rate was measured based on the ASTM E 2149:2020 test method.

[0154] As a result, the artificial grass piles manufactured in Examples 1 to 5 and Comparative Example 2 exhibited antibacterial efficacy of over 90% against the four strains mentioned above. However, in the case of the artificial grass piles manufactured in Comparative Example 1 that did not contain phenol, the antibacterial efficacy was only about 10 to 17%, indicating that the antibacterial effect was significantly low.

[0155] Example 1 Comparative Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 2 Escherichia coli > 99.9% 17.1% > 90% > 99.9% > 99.9% > 99.9% > 99.9% Staphylococcus aureus > 99.9% 11.8% > 90% > 99.9% > 99.9% > 99.9% > 99.9% Klebsiella pneumoniae > 99.9% 11.9% > 90% > 99.9% > 99.9% > 99.9% > 99.9% Pseudomonas aeruginosa > 99.9% 10.4% > 90% > 99.9% > 99.9% > 99.9% > 99.9%

[0156]

[0157] Experimental Example 2. Quality Evaluation of Artificial Turf Mats

[0158] The abrasion resistance of artificial grass mats manufactured from artificial grass pile yarns of comparative examples and examples was measured by measuring the weight change rate before and after abrasion by operating them 2,000 times according to the KS F 388-1: 2022 standard. In addition, the spinnability of the artificial grass pile yarns manufactured from comparative examples and examples was evaluated. As a result, in the case of comparative example 2, which had an excessively high phenol content, there was a problem of increased abrasion strength and reduced spinnability.

[0159] Example 1 Comparative Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 2 Abrasion strength (%) 1.2 1.2 1.2 1.2 1.2 2.4 2.6 6.7 Radiation workability Good Good Good Good Good Good Workability poor

[0160]

[0161] Experimental Example 3. Quality Criteria Evaluation of Artificial Turf Systems

[0162] The quality standards of Table 4 were evaluated according to the KS F 388-1: 2022 standard using an artificial turf mat manufactured using the artificial turf pile yarn of Example 1, a shock-absorbing drainage plate (20), and an artificial turf system including silica sand and elastic chips. As a result, the artificial turf system using the artificial turf pile yarn manufactured in Example 1 met the quality standards of the artificial turf system specified in KS F 388-1: 2022.

[0163] Test Item Unit Test Result Shock Absorbency %64 Vertical Deformation mm8 Rotation Resistance Nm34 Ball Rebound Force m0.67 Ball Rolling m6 Skin / Surface Friction - 0.65 Water Permeability mm / h2000 or more Shock Absorbency - After XL Stud Wear (6000 Cycles) %57 Vertical Deformation - After XL Stud Wear (6000 Cycles) mm5 Rotation Resistance - After XL Stud Wear (6000 Cycles) Nm47 Ball Rebound Force - After XL Stud Wear (6000 Cycles) m0.96 Ball Rolling - After XL Stud Wear (6000 Cycles) m10

[0164] * Filling amount - Silica: 25kg / m 2 , elasticity chip: 11kg / m 2 , shock Absorbent drain plate: 15mm

[0165]

[0166] Experimental Example 4. Quality Criteria Evaluation of Drainage Boards

[0167] In the present invention, after manufacturing a shock-absorbing drainage plate (20), the quality standards were evaluated according to the KS F 388-1: 2022 standard. As a result, the shock-absorbing drainage plate of the present invention met the quality standards specified in KS F 388-1: 2022.

[0168] Test ItemsTest ResultsPermanent Compression Ratio (%)2Tensile Strength (MPa)14.71Elongation (%)242Ozone Resistance Tensile Strength (MPa)14.02Ozone Resistance Elongation (%)226Impact Absorbency (%)44.2

[0169]

[0170] The artificial grass pile yarn manufactured by the artificial grass structure and the manufacturing method thereof according to the present invention having excellent antibacterial, shock-absorbing and drainage properties has an added antibacterial function against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa, thereby preventing the occurrence of pathogens caused by contaminants in advance and providing an artificial grass pile yarn that can maintain a pleasant environment.

Claims

1. Contains 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a composite antibacterial agent composed of phenol and zinc oxide. The above complex antibacterial agent is a mixture of phenol and zinc oxide in a weight ratio of 0.3 to 5:

1. An antibacterial artificial grass pile having antibacterial activity against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa.

2. In paragraph 1, The above phenol is an antibacterial artificial grass pile isolated from the bark of Paeonia japonica.

3. Bubble layer, An artificial grass pile tufted on the above-mentioned foam layer and composed of the pile yarn of claim 1 or claim 2; and Including a support layer formed by coating a polymer resin on the lower surface of the bubble layer, Artificial grass structure.

4. In paragraph 3, An artificial grass structure further comprising an adhesive layer connecting the lower surface of the support layer and the upper surface of the drainage plate, and a drainage plate attached to the lower surface of the adhesive layer.

5. In paragraph 4, An artificial grass structure in which a plurality of air holes are formed in a first horizontal member of the upper surface of the drainage plate and a second horizontal member of the lower surface of the drainage plate, and the plurality of air holes are arranged in a V shape.

6. Step 1 of producing an antibacterial masterbatch for producing an antibacterial artificial grass pile by mixing 77 to 96 wt% of polyethylene resin, 1 to 10 wt% of a light stabilizer, 1 to 5 wt% of calcium carbonate, and 2 to 8 wt% of a complex antibacterial agent composed of phenol and zinc oxide; and Step 2 of extruding the above antibacterial masterbatch into a film and stretching it to produce a flat yarn; The above complex antibacterial agent is a mixture of phenol and zinc oxide in a weight ratio of 0.3 to 5:

1. The above antibacterial artificial grass pile has antibacterial activity against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa. Method for manufacturing antibacterial artificial grass pile.

7. Step 1 of tufting artificial grass pile manufactured by the manufacturing method of Article 6 into a foam layer; Step 2: forming a support layer by coating a polymer resin on the lower surface of the bubble layer; Step 3: forming an adhesive layer on the lower surface of the support layer; and A method for manufacturing an artificial grass structure, comprising the step of attaching an upper surface of a drainage plate to a lower surface of the adhesive layer.

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