KR101149423B1 - Synthetic grass and a synthetic grass comprising the same - Google Patents

Abstract

PURPOSE: Artificial turf and an artificial turf structure therewith are provided to maintain the uniform temperature range of the artificial turf even in an external temperature change. CONSTITUTION: An artificial turf structure with artificial turf comprises the foundation ground(10), a fiber cloth(30), artificial turf units(50), filler(70) for artificial turf. The fiber cloth is spread on the top of the foundation ground. The artificial turf units are spread on the fiber cloth. The filler is located at the fiber cloth and is filled in the gaps between the artificial turf units.

Description

Synthetic grass and a synthetic grass comprising the same

The present invention relates to artificial turf and artificial turf structure comprising the same. Specifically, the present invention relates to an artificial turf and an artificial turf structure including the same, which can extend the life of the artificial turf and maintain physical properties such as elasticity of the artificial turf by maintaining a constant temperature range even with an external temperature change.

Turf is used for stadium applications because it is resistant to frequent cutting of land cover covering land surface and has compressive recovery characteristics. Particularly, in natural grass, there are Kentucky Bluegrass, Penal Real Grass, Tall Fescue, Creeping Vent Grass, etc., which are optimal for growth at the temperature of 15 to 25 ° C. Bermuda grasses are used to formulate each grass according to the frequency used to suit its climate characteristics. In addition, the growth pattern is different according to the type of grass, it is important to manage to have optimal conditions by varying the frequency of notice (forecast height) and mowing (grass cutting) suitable for each sport. In addition, because grass varieties have different characteristics such as abrasion resistance, pressure resistance, compression recovery, formation rate, root and leaf density, water resistance, and fertilizer demand, the growth and irrigation methods of grass vary depending on the temperature. The grass is grown and managed, especially since the roots tend to grow deeper as the height of the grass grows, so there is also the hassle of having to mow according to the purpose.

In general, these natural grasses contain sufficient moisture, so they have a good texture and provide cushioning, so they are safe from the risk of injury, and there are few frictional scratches when slipped. However, as the use continues, there is a drawback of severe wear due to external force due to severe stamping, which causes a problem of limiting the number of days of use and entry control of the turf ballpark.

Accordingly, research has been made on artificial turf having durability, such as wear resistance and shape stability, which can be easily managed and express natural grass feel.

However, when the user uses the place where artificial turf is constructed when walking or exercising, burns occur due to the frictional heat of the artificial turf, and the elastic force and the elastic force of the artificial turf are caused by the frictional heat and external temperature change. There is a disadvantage that the life is reduced.

In order to solve the above problems of the prior art, the present invention maintains a constant temperature range in the external temperature change, artificial grass that can extend the life of the artificial turf and maintain physical properties such as elasticity of the artificial turf and artificial including the same It is an object to provide a turf structure.

The present invention provides an artificial turf comprising a raw resin and a phase change material.

The present invention also provides an artificial turf structure comprising an artificial turf unit comprising the artificial turf and a fiber cloth on which the artificial turf unit is installed.

The artificial turf and the artificial turf structure including the same according to the present invention maintain a constant temperature range even when the external temperature changes, whereby the user does not get burned while walking or exercising, and the life of the artificial turf is extended, There is an advantage that physical properties such as elasticity are maintained.

1 is a cross-sectional view according to an embodiment of the invention artificial turf structure.
Figure 2 is a graph of temperature change of the preferred embodiment and comparative example of the present invention.

Artificial turf according to the invention is characterized in that it comprises a raw resin and a phase change material.

The raw resin is a resin having a thermoplastic that can be molded in the form of artificial turf, for example, selected from the group consisting of polypropylene, nylon, ethylene vinyl acetate, polyester, polyethylene, polyamide, polyvinylchloride and polystyrene polystyrene One or more, but may be a single, mixture or copolymer, but is not limited thereto.

The content of the fabric resin may be 50 to 90% by weight based on the total weight of the artificial turf, when less than 50% by weight is insufficient to form the form of artificial turf, artificial turf wear resistance, impact resistance is not sufficient If it is more than 90% by weight, the artificial turf is so hard that it lacks the properties (flexibility, elasticity, etc.) and texture similar to that of natural grass.

The raw resin preferably has properties similar to natural grass, and for this purpose, the molecular weight of the raw resin may be 1,000 to 20,000. When the molecular weight is less than 1,000, mechanical properties such as tensile strength, compressive strength, bending strength, etc. are not sufficient, and when the molecular weight is more than 20,000, flexibility and plasticity are insufficient, which causes difficulties in the manufacturing process.

In addition, the phase change material (PCM) is a material in which a phase change occurs from a liquid state to a solid state or from a solid state to a liquid according to an external temperature change. The latent heat here is the heat absorbed or released when the state of matter changes between gas and liquid or between liquid and solid. For example, when ice melts into water, it absorbs heat from the surroundings, and when water freezes upside down, it releases the same amount of heat, but the temperature does not change even when heat is released.

The phase change material of the present invention may be, for example, at least one selected from the group consisting of normal paraffin, stearic acid, beeswax, wax, glycerin, polyester gum, and polyethylene glycol, but is not limited thereto.

The melting point of the phase change material may be 20 to 50 ° C, more preferably 23 to 40 ° C, and more preferably 25 to 30 ° C.

The heat of fusion of the phase change material may be 184 to 250 KJ / kg, more preferably 200 to 240 KJ / kg, and more preferably 220 to 240 KJ / kg. If it is less than 184 KJ / kg it is not enough to absorb the radiant heat, frictional heat, and if it exceeds 250 KJ / kg manufacturing cost is too expensive and economical.

In addition, the phase change material may be included in the artificial turf with the raw resin in a solid state or a liquid state, and the artificial phase together with the raw resin by encapsulating the phase change material in a synthetic resin for easier processing. It may also be processed into grass.

For example, the synthetic resin encapsulating the phase change material may be any one or more selected from the group consisting of phenol resin, novolac, urea resin, melamine resin, epoxy resin, polyester resin, polypropylene resin, polyethylene resin and petroleum resin. It is not limited to this.

The content of the phase change material may be 3 to 30 parts by weight based on 100 parts by weight of the raw material resin, when less than 3 parts by weight may not fully express the effect of the latent heat of the phase change material, if it is more than 30 parts by weight Relatively reduced content of the raw resin can impair the physical properties of artificial turf.

In addition, the content of the phase change material may be different as shown in Table 1 according to the type of the raw resin.

The content of the phase change material may be 1 to 40 wt% based on heat capacity and compatibility based on the total weight of artificial turf.

In addition, the artificial turf of the present invention may further include a heat stabilizer, ultraviolet stabilizer and pigment.

The heat stabilizer may be any one or more selected from the group consisting of phenolic antioxidants songnox 1010, phenolic antioxidants songnox 1076, phenolic antioxidants songnox 1035, phosphate antioxidants 6260, and P-EPQ. In addition, the content of the thermal stabilizer may be 0 to 0.5% by weight based on the total weight of the artificial turf.

The UV stabilizer may be any one or more selected from the group consisting of Tinuvin P, UV944, and Chimasorb 81, but is not limited thereto. In addition, the content of the UV stabilizer may be 0 to 0.5% by weight based on the total weight of the artificial turf.

The pigment may be any one or more selected from the group consisting of cynine green, cynine blue, carbon black, and titanium dioxide, but is not limited thereto. The content of the pigment may be 0 to 10% by weight based on the total weight of the artificial turf.

The artificial turf of the present invention is prepared by mixing the raw resin and the phase change material, and at this time, the heat stabilizer, the UV stabilizer and the pigment can be mixed together. At this time, it is preferable to stir at an appropriate temperature that the raw resin can be melted and evenly mixed, the temperature is changed according to the melting temperature of the raw resin, which is a conventional temperature known in the art, but is not limited thereto.

In order to allow the mixture to be evenly mixed, a master batch method may be used in which materials other than the raw resin are first mixed in high concentration and then mixed with the raw resin.

The phase change material may be processed into artificial turf with the raw resin in the solid state or in the liquid state, and the phase change material is encapsulated in a synthetic resin to be more easily processed, and the artificial turf with the raw resin It can also be processed with. For example, the synthetic resin encapsulating the phase change material may be any one or more selected from the group consisting of phenol resin, novolac, urea resin, melamine resin, epoxy resin, polyester resin, polypropylene resin, and polyethylene resin, but is not limited thereto. Do not.

In addition, the mixture evenly mixed as described above is cooled after extrusion in the form of a flat yarn (flat yarn) through a nozzle, it can be cut into a length of 3 ~ 10cm to be produced in the artificial turf of the present invention.

On the other hand, the artificial turf of the present invention may include a filler for artificial turf.

The artificial turf filler may include a binder resin and a phase change material.

The binder resin may be any one or more selected from the group consisting of styrene ethylene butadiene styrene copolymer (SEBS), ethylene propylene diene M-class rubber (EPDM rubber), polyethylene, and polypropylene, but is not limited thereto.

The content of the binder resin may be 10 to 40% by weight based on the total weight of the filler for artificial grass, but is not limited thereto. If less than 10% by weight, the waste tire powder, calcium carbonate, zinc oxide, loess, cork, wood flour, rice hull, coconut, straw, reed, etc., which will be described later, lack the binding property, and the artificial turf filler is suspended in rain water or the like. If it exceeds 40% by weight, it may inhibit the impact resistance, hygroscopicity, etc. required as a filler for artificial grass.

The binder resin preferably has binding properties to aggregate waste tire powder, calcium carbonate, loess, cork, wood flour, rice husk, coconut, straw, reed, etc., which will be described later. For this purpose, the molecular weight of the binder resin is 1,000 to 100,000 days. Although it can be changed according to the required characteristics of the filler for artificial grass is not limited to this.

The present invention may include a phase change material, and the phase change material may be any one or more selected from the group consisting of, for example, normal paraffin, stearic acid, beeswax, wax, glycerin, polyester gum, and polyethylene glycol. It is not limited to this.

Melting point of the phase change material may be 20 to 50 ℃, heat of fusion may be 184 to 250 KJ / kg.

In addition, since the phase change material has a relatively low melting point, and may be liquefied and volatilized in the manufacturing process, the phase change material may be encapsulated in a synthetic resin for stable handling in the manufacturing process.

For example, the synthetic resin encapsulating the phase change material may be any one or more selected from the group consisting of phenol resin, novolac, urea resin, melamine resin, epoxy resin, polyester resin, polypropylene resin, and polyethylene resin, but is not limited thereto. Do not.

In addition, the content of the phase change material may be 3 to 40% by weight based on the total weight of the artificial grass filler, but is not limited thereto. If it is less than 3% by weight, the latent heat effect of the phase change material may not be sufficiently expressed, and if it is more than 40% by weight, the content of other constituents such as binder resin may be relatively decreased, which may inhibit the physical properties of the artificial turf filler. Can be.

In addition, the filler for artificial turf of the present invention may include any one or more selected from the group consisting of waste tire powder, calcium carbonate, zinc oxide, ocher, cork, wood flour, rice husk, coconut, straw and reed. Such a material is excellent in moisture content of water containing moisture, and can improve antistatic and wear resistance.

The waste tire powder, calcium carbonate, zinc oxide, loess, cork, wood flour, rice husk, coconut, straw, reed, etc., any one or more content is 50 to 80 weight based on the total weight of the artificial grass filler %, But is not limited thereto. If the content is less than 50% by weight, the moisture content of the artificial grass filler may be low, and thus an electrostatic cell may be generated.When the content is more than 80% by weight, the binder resin content is relatively decreased, so that the composition of the whole artificial grass filler lacks cohesion. Can be scattered, and may be suspended by rainwater due to the light weight.

In addition, the artificial turf filler of the present invention may further include any one or more selected from the group consisting of a heat stabilizer and an ultraviolet stabilizer.

The heat stabilizer may be any one or more selected from the group consisting of phenolic antioxidants songnox 1010, phenolic antioxidants songnox 1076, phenolic antioxidants songnox 1035, phosphate antioxidants 6260, and P-EPQ. In addition, the content of the thermal stabilizer may be 0 to 0.5% by weight based on the total weight of the artificial turf filler.

The UV stabilizer may be any one or more selected from the group consisting of Tinuvin P, UV944, and Chimasorb 81, but is not limited thereto. In addition, the content of the UV stabilizer may be 0 to 0.5% by weight based on the total weight of the artificial turf filler.

The pigment may be any one or more selected from the group consisting of cynine green, cynine blue, carbon black, and titanium dioxide, but is not limited thereto. The content of the pigment may be 0 to 10% by weight based on the total weight of the artificial turf filler.

The artificial turf structure according to the present invention is for artificial turf on which an artificial turf unit is installed, an artificial turf unit installed on the fiber fabric, and an artificial turf unit located on the fibrous fabric and filled between the artificial turf units installed. And a filler, and at least one of the artificial grass unit and the artificial grass filler includes a phase change material.

In addition, the artificial turf structure according to the present invention, as shown in Figure 1, the base ground 10, the fiber fabric 30, the artificial turf unit is installed on top of the base ground, artificial fibers laid on the fiber fabric The grass unit 50, which is located on the fiber fabric, may be composed of the artificial turf filler 70 is filled between the installed artificial grass units.

The foundation ground 10 may be a flattening operation so that the artificial turf according to the present invention may be installed, and may be coated with asphalt or the like, or may be a flat gravel / sand base.

As shown in FIG. 1, the fiber fabric 30 is positioned on the upper side of the foundation ground 10, and the material of the fiber fabric 30 is a thermoplastic resin, and may be manufactured with the same composition as the artificial turf unit described later. Can be.

The fiber fabric 30 includes a regular or irregular pattern such as a lattice pattern, honeycomb, and can be manufactured so that artificial turf units to be described later can be installed in the pattern.

The artificial turf unit 50 is a group of 3 to 20 strands of artificial turf made of flat yarns having a width of 0.3 to 1 cm and a length of 3 to 10 cm, like natural grass.

In addition, the artificial turf unit 50 may be spaced apart at regular intervals to be installed on the fiber fabric 30, preferably installed in the vertical direction on the upper surface of the fiber fabric 30, the base ground is located on the lower surface It is good.

The artificial turf filler 70 is located on the fiber cloth 30 on which the artificial turf unit 50 is installed, as shown in FIG. 1, and is filled between the artificial turf units installed. The artificial turf filler 70 is filled between artificial turf units to fix the artificial turf, and prevents static electricity due to the moisture contained in the artificial turf filler 70. In addition, the artificial turf filler 70 includes a phase change material, thereby reducing deformation due to radiant heat and ultraviolet rays and preventing burns due to frictional heat.

The artificial turf structure 100 according to the present invention includes a silica sand layer 110 between the fibrous fabric 30 on which the artificial turf unit 50 is installed and the filler 70 for artificial turf, whereby the fiber fabric is Due to the weight of the silica sand, it can be installed more stably.

When at least one of the artificial turf unit and the artificial turf filler includes a phase change material, the phase change material absorbs geothermal or frictional heat on many surface surfaces, but the temperature of the artificial turf structure does not change much, so that the user does not burn the image. It can prevent damage such as wear.

The phase change material of the present invention may be, for example, at least one selected from the group consisting of normal paraffin, stearic acid, beeswax, wax, glycerin, polyester gum, and polyethylene glycol, but is not limited thereto.

In addition, the phase change material may be processed into a filler for artificial grass with the binder resin and the like in a solid state or a liquid state, and in consideration of the ease of processing, the phase change material is encapsulated in a synthetic resin and the fabric resin With artificial turf.

For example, the synthetic resin encapsulating the phase change material may be any one or more selected from the group consisting of phenol resin, novolak, urea resin, melamine resin, epoxy resin, polyester resin, polypropylene resin, and polyethylene resin. It is not limited to this.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited thereto.

* Temperature: Instantaneous measurement temperature when it reaches 32 ℃ after rising from 25 ℃ to 32 ℃ at 1 ℃ / 10min.

10: foundation ground 30: fiber fabric
50: artificial grass unit
70: filler 100: artificial grass structure
110: silica sand layer

Claims (10)

A synthetic grass comprising a raw resin and a phase change material, wherein the content of the phase change material is 3 to 30 parts by weight based on 100 parts by weight of the raw resin. The artificial turf of claim 1, wherein the phase change material has a melting point of 20 to 50 ° C. The artificial turf of claim 1, wherein the phase change material has a heat of fusion of 184 to 250 KJ / kg. The artificial turf of claim 1, wherein the phase change material is encapsulated in a synthetic resin. The artificial turf of claim 4, wherein the synthetic resin is at least one selected from the group consisting of phenol resins, novolacs, urea resins, melamine resins, epoxy resins, polyester resins, polypropylene resins, and polyethylene resins. delete The artificial turf of claim 1, wherein the fabric resin is at least one selected from the group consisting of polypropylene, nylon, polyester, polyethylene, polyamide, polyvinyl chloride, and polystyrene. Artificial turf structure comprising an artificial turf unit comprising the artificial turf according to any one of claims 1 to 5 and 7 and a fiber cloth on which the artificial turf unit is installed. 9. The artificial turf structure of claim 8, further comprising a filler for artificial turf located on the fiber fabric and filled between the installed artificial turf units. 10. The artificial turf structure of claim 9, wherein the filler for artificial turf comprises a phase change material encapsulated with synthetic resin.

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