A shock-absorbing and drainage pad for artificial turf, configured to disperse thermal deformation and to prevent non-uniform heat behavior at joint portions and lifting caused by slit valves

Abstract

The present invention relates to a shock-absorbing drainage pad for thermal deformation-dispersing artificial turf that prevents specific heat phenomena in the moisture section and lifting caused by a slit valve. More specifically, the invention relates to a drainage section that supports artificial turf laminated on an upper surface to provide excellent shock absorption and smooth drainage, and in which water stored in the moisture section acts as a thermal buffer through a specific heat effect to lower the surface temperature of the artificial turf, efficiently disperses and limits thermal deformation forces during the contraction and expansion of the body section (in which a mesh net is installed), prevents lifting of the body section through a slit valve formed in the moisture section, and prevents slipping or sliding between the artificial turf and the shock-absorbing drainage pad. A shock-absorbing drainage pad for heat-deformable dispersed artificial turf that prevents the non-heat phenomenon of the moisture portion and lifting caused by a slit valve according to one embodiment of the present invention supports the artificial turf, which is tufted along the weft and warp threads, from below, and comprises: a body portion of a predetermined thickness that spreads out in the longitudinal direction; a drainage portion in which a grid of drainage channels is formed on the surface of the body portion; an adhesive portion that is attached along the lower side of one side of the body portion with a predetermined width; and a moisture portion that is spaced apart along the longitudinal direction of the body portion and is arranged in a row by being cut in a '+' or 'o' shape between the drainage channels. The body portion is a PE foam that absorbs shock and has a core member installed in the lower part, and the drainage portion has grooves formed with a depth of 4 to 12 mm with the drainage channels spaced apart at intervals of 7 to 100 mm.

Description

Technology Field

[0001] The present invention relates to a "shock-absorbing drainage pad for thermal deformation-dispersing artificial turf that prevents specific heat phenomena in the moisture section and lifting caused by a slit valve," and more specifically, to a drainage system that supports artificial turf laminated on an upper surface to provide excellent shock absorption and smooth drainage, and in which water stored in the moisture section acts as a thermal buffer through a specific heat effect to lower the surface temperature of the artificial turf, efficiently disperses and limits thermal deformation forces during the contraction and expansion of the body section (in which a mesh net is installed), prevents lifting of the body section through a slit valve formed in the moisture section, and adds a function to prevent slipping or sliding between the artificial turf and the shock-absorbing drainage pad. Background Technology

[0002] Recently, there have been many instances of constructing sports fields at schools or public facilities as grass or artificial turf fields. Natural grass fields, created for user safety and landscaping purposes, are made by sowing grass seeds or transplanting grass.

[0003] In Korea, where the winter season is long, natural grass fields are used for only about 40 to 50 days a year, and the efficiency of the fields drops sharply when usage is restricted to protect the grass. Furthermore, as natural grass requires meticulous attention to maintenance, such as watering and replanting due to damage, the construction area of ​​artificial turf fields, which are more versatile than natural grass fields, is expanding rapidly.

[0004] Artificial turf installed on artificial turf fields is broadly categorized into: 'technology for producing pile yarn for artificial turf,' 'manufacturing technology for embedding and cutting artificial fibers into a base sheet using pile yarn,' 'back coating technology (including heat fusion technology) that increases tensile strength by fixing the pile yarn to the base sheet through full coating of SBR latex, polyurethane (PU), and polyvinyl chloride (PE) on the underside of the base sheet containing the pile yarn knots,' 'rolling technology for paving,' and 'technology for installing artificial turf at the construction site.'

[0005] General artificial turf (or artificial turf mat) is configured to form a pile layer by tufting artificial turf onto one or more layers of foam paper using a tufting machine, and to form a foam layer on the bottom surface of the foam paper by back coating or heat fusion. Although artificial turf manufactured in this manner has good durability, its shock absorption is very poor, so an elastic filler must be laid in the pile layer when constructing a stadium.

[0006] 'Shock-absorbing pad for artificial turf that facilitates carbon reduction and fine dust capture (No. 10-22226288)' was announced on March 4, 2021, and 'production system for artificial turf mat with excellent resilience and shock absorption and method for producing artificial turf mat using the system (No. 10-2233661)' was announced on March 31, 2021.

[0007] The above invention relates to artificial turf that satisfies all of the following: tensile strength, drainage, deformation resistance, and durability, using a heat fusion method in which resin powder is dispersed or a back coating method in which a coating liquid is sprayed. Although the back coating method of the above invention is configured to manufacture artificial turf with excellent resilience and shock absorption by spraying a coating liquid (synthetic resin and hardener) onto a foam sheet multiple times, there is a problem in that the installation of infill material cannot be completely eliminated.

[0008] In other words, there is an urgent need for a mounting and support plate that not only offers excellent shock absorption but also smoothly drains water flowing down into the artificial turf, prevents deformation of the drainage pad through efficient contraction and expansion due to temperature changes, lowers the temperature inside or on the surface of the artificial turf using evaporative cooling, and stably supports the artificial turf. Prior art literature

[0009] Korean Patent Registration No. 10-2222628, Title of Invention "Composition of shock-absorbing pad for artificial turf facilitating carbon reduction and fine dust capture and shock-absorbing pad for artificial turf manufactured from said composition" (Date of Publication: March 4, 2021) Korean Patent Registration No. 10-2233661, Title of Invention "Production system for artificial turf mat with excellent resilience and shock absorption and method for producing artificial turf mat using said system" (Date of Publication: March 31, 2021) The problem to be solved

[0010] The present invention was created to solve the aforementioned problems and necessities, and aims to provide a "thermal deformation-dispersing shock-absorbing drainage pad for artificial turf that prevents lifting caused by the specific heat phenomenon in the moisture section and the slit valve," which supports artificial turf laminated on the upper surface to provide excellent shock absorption and smooth drainage, lowers the surface temperature of the artificial turf by acting as a thermal buffer through the specific heat effect of the water stored in the moisture section, efficiently disperses and limits thermal deformation forces during the contraction and expansion of the body section (with a mesh net installed), prevents lifting of the body section through the slit valve formed in the moisture section, and adds a drainage function to prevent detachment, slipping, or sliding between the artificial turf and the shock-absorbing drainage pad. means of solving the problem

[0011] To achieve the above objective, a shock-absorbing drainage pad for heat-deformable dispersed artificial turf according to one embodiment of the present invention, which prevents the non-heat phenomenon of the moisture portion and lifting caused by a slit valve, supports the artificial turf that is tufted along the weft and warp threads from below, and comprises: a body portion of a predetermined thickness that spreads out in the longitudinal direction; a drainage portion in which a grid of drainage channels is formed on the surface of the body portion; an adhesive portion attached with a predetermined width along the lower side of one side of the body portion; and moisture portions arranged in a row by being cut in a '+' or 'o' shape between the drainage channels while being spaced apart along the longitudinal direction of the body portion; wherein the body portion is a PE foam that absorbs shock and has a core member installed in the lower part, and the drainage portion has grooves formed with a depth of 4 to 12 mm with the drainage channels spaced apart at intervals of 7 to 100 mm. Effects of the invention

[0012] According to the present invention, drainage efficiency is improved through a grid-shaped drainage section formed on the surface of the body section, and external shocks are effectively absorbed through the body section that supports the artificial turf from below, thereby enhancing user safety and convenience.

[0013] In addition, installation stability is ensured through the connection between the body and the sweat protrusions on the underside of the artificial turf, and there is the advantage of preventing detachment or slipping after installation.

[0014] Furthermore, a core member (e.g., a mesh) formed at the bottom of the body disperses expansion or contraction caused by thermal deformation, preventing structural deformation and slipping or sliding of the artificial turf. Additionally, water stored in the moisture section acts as a thermal buffer through a specific heat effect, thereby lowering the ambient temperature. The moisture section further includes slit valves spaced at predetermined intervals to prevent the body from lifting when submerged, enabling stable operation under various environmental conditions. This configuration provides the effect of simultaneously improving the durability and functionality of a shock-absorbing drainage pad for artificial turf that disperses thermal deformation by preventing specific heat phenomena in the moisture section and lifting caused by the slit valves.

[0015] The effects according to the present invention are not limited to those exemplified above, and a wider variety of effects are included in the specification of the present invention. Brief explanation of the drawing

[0016] FIG. 1 is a cross-sectional view illustrating a state in which a portion of a shock-absorbing drainage pad for thermal deformation-dispersing artificial turf, which prevents specific heat phenomena in the water portion and lifting caused by a slit valve according to one embodiment of the present invention, is installed under the artificial turf. FIG. 2 is a perspective view illustrating a shock-absorbing drainage pad for thermal deformation dispersion type artificial turf that prevents specific heat phenomena in the water section and lifting caused by a slit valve according to one embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of a shock-absorbing drainage pad for thermal deformation dispersion type artificial turf that prevents specific heat phenomena in the water section and lifting caused by a slit valve according to one embodiment of the present invention. FIG. 4 is a perspective view showing the state in which a shock-absorbing drainage pad for thermal deformation-dispersing artificial turf is installed to prevent specific heat phenomena in the water section and lifting caused by a slit valve according to one embodiment of the present invention. Figure 5 is an enlarged view of section "A" of Figure 1. Specific details for implementing the invention

[0017] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description.

[0018] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0019] Furthermore, the components of the embodiments described with reference to each drawing are not limited to the respective embodiments and may be implemented to be included in other embodiments within the scope of maintaining the technical concept of the present invention. It is also obvious that multiple embodiments may be re-implemented as a single embodiment that integrates multiple embodiments, even if a separate description is omitted.

[0020] In addition, when describing with reference to the attached drawings, identical components are assigned the same or related reference numerals regardless of drawing symbols, and redundant descriptions thereof are omitted.

[0022] Artificial turf is widely used in various fields, such as sports stadiums, parks, and residential spaces, as a material that can replace natural grass. In particular, demand for artificial turf is steadily increasing due to its advantages, including ease of maintenance, excellent durability, and the ability to maintain consistent quality regardless of season or climate.

[0023] Recently, products incorporating various technical elements such as shock absorption, drainage performance, and ease of installation are being developed to further enhance the functionality of artificial turf, and these technological advancements are moving in a direction that simultaneously considers user safety and convenience.

[0024] However, conventional mats woven from artificial turf lacked sufficient shock absorption performance, potentially causing user fatigue or injury. Additionally, inadequate drainage could lead to water pooling during rainfall, worsening the usage environment, or cause structural deformation during prolonged use.

[0025] Furthermore, cases of detachment or slippage occurring over time after installation have been reported due to low bonding stability during the installation process. These limitations act as major factors hindering the long-term usability and safety of artificial turf.

[0026] Therefore, a technical solution is required to ensure structural stability by reinforcing the shock absorption performance of artificial turf while maximizing drainage efficiency.

[0027] In particular, there is a growing need for technology that provides convenience in the installation and maintenance process, along with a structural design capable of operating stably under various environmental conditions.

[0029] The present invention, created in response to conventional problems and needs, proposes a "thermal deformation dispersion type shock-absorbing drainage pad for artificial turf that prevents specific heat phenomena in the moisture section and lifting caused by a slit valve," comprising a drainage channel that not only effectively absorbs shocks applied to the artificial turf but also facilitates smooth drainage during rainfall, generates heat of vaporization using the absorbed water (moisture) to lower the temperature within or on the surface of the artificial turf, efficiently disperses and limits shrinkage and expansion, and prevents slipping or sliding between the artificial turf and the drainage pad.

[0030] In particular, the present invention is equipped with excellent water drainage and water storage capabilities, so that water stored in the moisture portion acts as a thermal buffer through a specific heat effect, lowering the surface temperature of the artificial turf and efficiently dispersing it during shrinkage and expansion.

[0031] Here, the specific heat effect refers to the fact that water stored in the water body absorbs external heat due to its high specific heat, thereby suppressing the temperature rise, and under high-temperature conditions, some of the moisture provides an additional cooling effect through the latent heat of vaporization.

[0032] In addition, latent heat of vaporization refers to the amount of heat absorbed without a change in temperature when a liquid undergoes a phase change into a gas, and is defined as the amount of heat (J / g or kJ / mol) required to convert 1g of liquid into gas at the same temperature. For example, the cooling effect of lowering body temperature as sweat evaporates falls under this category.

[0033] In addition, a slit valve is formed that penetrates the upper and lower parts of the body at predetermined intervals within the function section, and the upper part of the slit valve is completely closed by the pressure of the artificial turf (weight), but when flooded, it opens from the bottom to discharge a large amount of water to the top all at once, thereby dispersing the buoyancy of the turf, maintaining the restoring force, and preventing lifting.

[0034] In addition, artificial turf is typically woven as a basic unit by layering an outer fabric and a lining made of foam and tufting pile yarns made of nylon or similar materials in rows over them; as a result of the tufting, the pile yarn stitches (protrusions) exposed on the underside of the outer fabric are formed to protrude in rows.

[0036] FIG. 1 is a cross-sectional view showing a part of a shock-absorbing drainage pad for a heat-deformable dispersed artificial turf that prevents specific heat phenomena in the moisture portion and lifting caused by a slit valve according to an embodiment of the present invention installed under the artificial turf; FIG. 2 is a perspective view showing a shock-absorbing drainage pad for a heat-deformable dispersed artificial turf that prevents specific heat phenomena in the moisture portion and lifting caused by a slit valve according to an embodiment of the present invention; and FIG. 3 is an enlarged cross-sectional view of a shock-absorbing drainage pad for a heat-deformable dispersed artificial turf that prevents specific heat phenomena in the moisture portion and lifting caused by a slit valve according to an embodiment of the present invention.

[0037] Here, the drainage pad (100) of the present invention in FIGS. 1 and FIGS. 3 is illustrated with a cross-section that is somewhat exaggerated for easier understanding.

[0038] In addition, FIG. 4 is a perspective view showing the state in which a shock-absorbing drainage pad for a heat-deformed dispersed artificial turf is installed to prevent specific heat phenomena in the water section and lifting caused by a slit valve according to one embodiment of the present invention, and FIG. 5 is an enlarged view of section "A" of FIG. 1.

[0040] Referring to the drawings above, a shock-absorbing drainage pad (100) for a heat-deformed dispersed artificial turf that prevents non-heat phenomena in the water section and lifting caused by a slit valve according to one embodiment of the present invention is a pad that supports the artificial turf (AT) being tufted along the weft and warp threads from below, and comprises: a body section (110) of a predetermined thickness that spreads out in the longitudinal direction; a drainage section (120L) in which a grid of drainage channels (120L) is formed on the surface of the body section (110); an adhesive section (130) that is attached with a predetermined width along the lower side of the body section (110); and a water section (140) that is spaced apart along the longitudinal direction of the body section (110) and is cut in a shape such as a '+' or an 'o' between the drainage channels (120L) and arranged in a row.

[0041] In addition, the body part (110) may be a PE foam capable of absorbing shock, and a core member (110M) may be installed in the lower part.

[0042] Additionally, the core member (110M) may be a heat-fused mesh net that is bound in a mesh shape.

[0043] Additionally, the drainage section (120) may have grooves formed with a depth (d) of 4 to 12 mm, with the drainage channels (120L) spaced apart at intervals of 7 to 100 mm.

[0044] In particular, the above-mentioned water (moisture) can generate a specific heat effect by utilizing the water (moisture) to lower the surface temperature of the artificial turf (AT), disperse the expansion or contraction force of the body part (110) to the surroundings, and prevent the protrusion (sweat) exposed on the underside of the artificial turf (AT) from being caught, slipping, or sliding.

[0045] That is, the above-mentioned water-filled section (140) lowers the surface temperature of the artificial turf (AT) by acting as a thermal buffer through the non-thermal effect, disperses the expansion or contraction force of the body section (110), and holds the protrusion (sweat) exposed downward on the lower surface of the artificial turf (AT), thereby preventing slipping or sliding between the artificial turf (AT) and the drainage pad (100).

[0046] In other words, the above-mentioned water-containing part (140) lowers the surface temperature of the artificial turf (AT) by having the water stored in the cut-out gap act as a thermal buffer through a non-thermal effect, disperses the expansion or contraction force of the body part (110), and holds the protrusions (sweat) exposed downward in a row on the lower surface of the artificial turf (AT), thereby preventing separation, slipping, or sliding between the artificial turf (AT) and the drainage pad (100).

[0047] Additionally, the above function section (140) further includes a slit valve (140X) that is positioned at predetermined intervals and penetrates the upper and lower parts of the body section (110). The slit valve (140X) is normally closed, but when flooded, the water in the lower part of the body section rises and creates upward water pressure, causing it to open and discharge upwards from the body section (110), thereby preventing the body section (110) from lifting up.

[0048] In addition, the above function part (140) is characterized by not encroaching upon or interfering with the above drainage channel (120L).

[0050] Then, the configuration and use of the shock-absorbing drainage pad (100) for thermal deformation dispersion type artificial turf that prevents specific heat phenomena in the water section and lifting caused by the slit valve according to embodiments of the present invention are described in detail as follows.

[0051] The shock-absorbing drainage pad (100) for thermal deformation dispersed artificial turf proposed by the present invention, which prevents the non-thermal phenomenon of the water section and lifting by the slit valve, is a component capable of not only having excellent shock absorption for the artificial turf (AT) but also facilitating drainage, generating a non-thermal effect using water (moisture) to lower the surface temperature of the artificial turf (AT), efficiently dispersing and limiting shrinkage or expansion force during shrinkage and expansion, preventing lifting of the drainage pad (100) through the slit valve, and blocking separation, slipping, or sliding between the artificial turf (AT) and the drainage pad (100), and as shown in FIGS. 1 and 2, it may include a body section (110), a drainage section (120), an adhesive section (130), and a water section (140).

[0052] For reference, artificial turf (AT) is made of synthetic resin that replaces natural grass and is placed on the shock-absorbing drainage pad (100) of the present invention. It mimics the texture of natural grass while enhancing durability, ease of maintenance, and climate adaptability, and is widely used in sports stadiums, landscaping, indoor and outdoor spaces, etc.

[0053] In particular, as shown in FIG. 1, the artificial turf (AT) is tufted along the weft yarn, which is the horizontal direction of the fabric, and the warp yarn, which is the vertical direction of the fabric perpendicular to the weft yarn, so that the pile yarn protrusions (sweat) exposed on the underside are held in rows in the moisture section (140) or drainage channel (120L), which will be described in detail later, thereby preventing slipping or sliding.

[0054] For example, artificial turf is typically woven as a basic unit by layering an outer fabric and a lining made of a foamed paper and tufting pile yarns made of nylon or the like in rows over them. In the artificial turf (AT), the pile yarn stitches (protrusions) exposed to the underside of the outer fabric by the tufting are formed to protrude in rows.

[0056] The body portion (110) is a main member of a predetermined thickness that is laid on the ground first and then has artificial turf (AT) laminated on it, and can provide a basic structure that is spread out in the longitudinal direction and combined with other components as shown in FIGS. 2 to 4, etc.

[0057] Additionally, the body part (110) can be wound into a roll shape and transported, then unwound in the longitudinal direction and installed, and the upper surface and lower surface can be designed to perform different functions.

[0058] Additionally, the body portion (110) may have a predetermined thickness of 7 to 30 mm under artificial turf (AT) and may provide durability against the external environment, and a drainage portion (120) and a moisture portion (140) may be formed on the surface of the body portion (110).

[0059] In particular, the body portion (110) is a cushioning member capable of absorbing shock applied to the artificial turf (AT) and can support and fix the artificial turf (AT) stacked on the upper surface from below. That is, as shown in FIG. 1, the body portion (110) can support the artificial turf (AT) from below and perform the role of absorbing and cushioning the shock applied to the artificial turf (AT).

[0060] In addition, the body portion (110) is made of polyethylene (PE) foam and can effectively absorb external shocks and can be uniformly supported across the entire lower area of ​​the artificial turf (AT).

[0061] For reference, PE foam is ① lightweight and flexible, ② has high chemical stability, ③ has a high water absorption rate which is advantageous for waterproofing and thermal insulation, and ④ has excellent shock absorption.

[0062] Additionally, the body portion (110) is a closed-cell foam and can perform a shock absorption function by inducing elastic deformation according to an external load (impact) applied to the artificial turf (AT).

[0063] In addition, as shown in FIG. 3, the body part (110) has a core member (110M) installed in the lower part to disperse and limit thermal deformation force, so it can efficiently respond to shrinkage and expansion.

[0064] In particular, the core member (110M) proposed by the present invention is a mesh net that is bound in a mesh shape, and forms a framework within a polyethylene (PE) foam so that it can disperse and limit thermal deformation force while maintaining an external shape, and is also very rigid and has excellent durability.

[0066] As illustrated in FIG. 2 and FIG. 3, etc., the drainage section (120) includes drainage channels (120L) formed in a grid on the surface of the body section (110), and grooves with a width of 2 to 30 mm and a depth (d) of 4 to 12 mm can be formed by spaced apart at intervals of 7 to 100 mm.

[0067] That is, the drainage section (120) has drainage channels (120L) formed in a grid shape on the surface of the body section (110) so that drainage can be performed in all directions from under the surface of the artificial turf (AT). In addition, the drainage section (120) is designed so that the drainage channels (120L) can be well drained in all directions (front, back, left, and right) to improve drainage efficiency.

[0068] Additionally, the drainage section (120) forms a drainage channel (120L) under the artificial turf (AT), so it can be designed to harmonize with the artificial turf (AT) above and not interfere with the drainage function.

[0069] In particular, the drainage channels (120L) of the drainage section (120) are spaced apart at intervals of 7 mm to 100 mm to secure a discharge path, and are formed with grooves having a width of 2 mm to 30 mm and a depth (d) of 4 mm to 12 mm to facilitate discharge. That is, the drainage section (120) can be arranged repeatedly and uniformly over the entire upper surface of the body section (110).

[0070] Meanwhile, if the spacing of the drainage channel (120L) is less than 7mm, it is too dense, and if it exceeds 100mm, the flow of drainage may be restricted, and if it exceeds a depth (d) of 4mm or more and 12mm or less, the drainage efficiency decreases.

[0072] The adhesive portion (130) is an adhesive member with adhesive applied to the bonding surface, formed with a predetermined width along the lower side of one side of the body portion (110) so that the lower surfaces of adjacent body portions (110) can be attached and bonded.

[0073] That is, the adhesive part (130) can perform the function of firmly fixing the gap formed along the joint line between the body parts (110) so that it does not open.

[0074] In addition, the adhesive portion (130) is formed with a predetermined width and can be stably attached to the lower surfaces on both sides of the body portion (110).

[0075] Additionally, the adhesive portion (130) can prevent separation between the body portions (110), provide structural stability after installation, and can be continuously attached along the lower sides of both body portions (110).

[0076] In particular, since the body part (110) made of PE foam material has a very non-polar surface and low surface energy, it is a material that does not adhere well with general adhesives, so the adhesive part (130) may be one of the following: urethane adhesive, hot melt adhesive, compression adhesive, and adhesive using a PE / PP dedicated primer, which are used exclusively for low surface energy (LSR) materials.

[0078] As shown in FIGS. 2 to 6, the function portion (140) may be formed in a row by being spaced apart along the longitudinal direction of the body portion (110) and cut in a '+' or 'o' shape between the drainage portions (120).

[0079] In particular, the functional portion (140) forms a '+' or 'O' shaped cut mark (gap) with a depth of 4 to 12 mm to disperse the expansion or contraction force of the body portion (110), thereby preventing it from rising or twisting from the ground, and preventing the artificial turf (AT) and drainage pad (100) attached to the upper surface of the body portion (110) from separating, sliding, or slipping.

[0080] To explain more specifically, the function portion (140) proposed by the present invention is separated and connected at regular intervals like a railway rail, so that when the body portion (110) expands, the expansion force or when it contracts, the contraction force is dispersed to the surroundings, thereby preventing the body portion (110) from twisting or becoming unsightly bulging.

[0081] In addition, as illustrated in FIG. 5, the functional portion (140) prevents the sweat (protrusion) portion exposed to the lower surface of the artificial turf (AT) stacked on the upper side from being pushed or slipped by the cut mark (gap), and also performs a mutual gripping function, and can also solve problems such as separation and detachment between the artificial turf (AT) and the drainage pad (100).

[0082] That is, the function portion (140) is formed to intersect in a shape such as a '+' or an 'o', so that the protrusions (sweat) on the lower surface of the artificial turf (AT) are inserted and caught, thereby preventing the artificial turf (AT) from sliding or slipping, and can contribute to maintaining structural stability by preventing the artificial turf (AT) from shifting or coming off.

[0083] For reference, the function part (140) may be in the shape of an 'o' as shown in FIG. 2, or in the shape of a '+' as shown in "B" of FIG. 2, and various shapes capable of holding water internally may be applied.

[0084] That is, the water section (140) can absorb a certain amount of water through the cut gaps, and later, the absorbed water can absorb heat from the surroundings and lower the surrounding temperature by acting as a heat buffer through a specific heat effect.

[0085] For example, the ground surface (surface) of a sports field can rise to 80°C due to the radiant heat of sunlight during the summer, and as the pile yarns of the infill or artificial turf (AT) become soft, they do not stand upright and lie down, making it difficult to perform sports activities on the sports field.

[0086] However, when water is sprayed on the artificial turf (AT) during rainfall or when water is sprayed on the artificial turf (AT), water can seep into the moisture portion (140) formed in the body portion (110) and become moist. Even if the temperature rises significantly during the summer, the water stored in the moisture portion (140) formed at the bottom of the artificial turf (AT) acts as a thermal buffer through a specific heat effect, thereby lowering the temperature of the surface of the artificial turf (AT) and improving the usage environment of the artificial turf (AT).

[0087] In particular, the water stored in the water section (140) has a very significant effect of naturally lowering the temperature inside or on the surface of the artificial turf (AT) by acting as a thermal buffer through a specific heat effect.

[0088] Meanwhile, the depth of the water part (140) is limited to 4mm or more and 12mm or less, because if it is less than 4mm, the gap for water to be absorbed is weak or water cannot be absorbed well due to the surface tension of water, and if it exceeds 12mm, it may cause internal cracking or tearing of the body part (110).

[0089] Furthermore, the function portion (140) may further include slit valves (140X) that are arranged at predetermined intervals and penetrate the upper and lower portions of the body portion (110), as illustrated in FIG. 2, etc.

[0090] In particular, the slit valve (140X) penetrates the body part (110) vertically and is slit in an 'X' shape, so that it can simultaneously perform the functions of a passage and a valve to bring the water at the bottom of the body part (110) to the top when submerged.

[0091] That is, it is normally closed, but when rainwater or flooding occurs, water accumulates at the bottom of the body part (110). When the water at the bottom (lower) of the body part (110) rises and creates upward water pressure, the slit valve (140X) that penetrates the upper and lower parts naturally opens and discharges water to the upper part of the body part (110), thereby preventing the body part (110) from lifting up.

[0092] For reference, one of the major problems with artificial turf is that if it gets submerged in water due to rainwater, the turf lifts in places, not only severely damaging the appearance but also incurring high maintenance costs.

[0094] In this way, the shock-absorbing drainage pad (100) for thermal deformation dispersion type artificial turf that prevents specific heat phenomena in the water section and lifting caused by the slit valve according to the embodiments of the present invention can be expected to have the following effects.

[0095] According to the present invention, drainage efficiency is improved through a grid-shaped drainage section (120) formed on the surface of a body section (110), and there is an advantage of improving user safety and convenience by effectively absorbing external shocks applied to the artificial turf (AT) while efficiently dispersing and limiting thermal deformation force during shrinkage and expansion through a body section (110) that supports the artificial turf (AT) and a core member (110M) installed in the body section (110).

[0096] In addition, installation stability is ensured through the connection of the adhesive part (130) along the longitudinal direction of the body part (110), and there is an advantage of preventing detachment or slipping after construction.

[0097] In addition, the core member (110M) formed at the bottom of the body part (110) disperses expansion or contraction forces to the surroundings, thereby preventing structural deformation and slipping or sliding between the artificial turf (AT) and the drainage pad (100). Furthermore, the water stored in the moisture part (140) acts as a thermal buffer through a specific heat effect, naturally lowering the surrounding temperature. Additionally, the moisture part (140) includes slit valves (140X) arranged at predetermined intervals to prevent lifting of the body part (110) when submerged, and enables stable use under various environmental conditions. This configuration can provide a significant effect of simultaneously improving the durability and functionality of the heat-deformation dispersed shock-absorbing drainage pad (100) for artificial turf.

[0099] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention without departing from its nature.

[0100] Accordingly, the embodiments disclosed in this invention and the accompanying drawings are intended to explain, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments and the accompanying drawings.

[0101] The scope of protection of the present invention shall be interpreted by the claims set forth below, and all technical ideas within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0102] 100: Heat-deformation dispersing shock-absorbing drainage pad for artificial turf that prevents specific heat phenomena in the moisture section and lifting caused by slit valves 110 : Body part 110M : Deep material 120 : Drainage section 120L : Drain 130 : Adhesive part 140 : Function part 140X : Slit valve AT : Artificial turf

Claims

Claim 1 A shock-absorbing drainage pad for heat-deformable dispersed artificial turf that supports from below artificial turf, in which artificial turf is tufted along the weft and warp threads, and prevents lifting caused by a slit valve and a specific heat phenomenon in the moisture section, comprising: a body section of a predetermined thickness that spreads out in the longitudinal direction; a drainage section in which a grid of drainage channels is formed on the surface of the body section; and an adhesive section that is attached with a predetermined width along the lower side of one side of the body section. and includes the water section arranged in a row, spaced apart along the longitudinal direction of the body section and cut in a '+' or 'o' shape between the drainage channels; wherein the body section is a shock-absorbing PE foam and has a core member installed therein that is bound in a mesh shape at the bottom, and the drainage section has grooves formed to a depth of 4 to 12 mm with the drainage channels spaced apart at intervals of 7 to 100 mm, and the water entering the water section through the cut gaps evaporates to lower the surface temperature of the artificial turf, disperses the expansion or contraction force of the body section, and prevents the artificial turf from sliding or slipping by gripping the protrusions exposed in a row on the lower surface of the artificial turf, and the water section further includes the slit valve that is arranged at predetermined intervals and penetrates the upper and lower parts of the body section, and the slit valve is normally closed, but when flooded, the water at the bottom of the body section rises A shock-absorbing drainage pad for thermal deformation dispersion type artificial turf that prevents specific heat phenomena in the water body and lifting caused by a slit valve, characterized by opening when upward water pressure is generated and discharging to the upper part of the body to prevent lifting of the body. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A shock-absorbing drainage pad for thermal deformation-dispersing artificial turf that prevents specific heat phenomena in the water-containing part and lifting caused by a slit valve, characterized in that, in claim 1, the water-containing part does not encroach upon or interfere with the drainage channel.

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