KR101764701B1 - Wood powder filler for artificial turf and method of manufacturing thereof - Google Patents

Abstract

The present invention relates to a wood powder-based eco-friendly filling material for artificial turf and artificial turf containing the filling material. It is verified that the filling material for artificial turf manufactured of a wood powder as a main material according to the present invention is harmless to humans and contains no heavy metal. In addition, recycling of the wood power filling material is 100% possible, and thus it is verified that the regeneration thereof in an eco-friendly manner is possible. In addition, defects such as deformation, burrs, and the like are not found through an analysis of the appearance and durability of the filling material manufactured of the wood powder. The hardness of the filling material is 77-80, not too hard and not too soft, and thus the deformation of the filling material is not generated after actual installation. A degree of dust generation is good, and thus excellent wear resistance is verified. Additionally, it is verified that the filling material satisfies the criteria for A-1 grade according to quality criteria of an artificial turf KS M 3888-1:2013 system by evaluating the impact absorbing capacity and vertical deformation rate of the filling material since the impact absorbing capacity of the filling material is 50% or higher, and the vertical deformation rate thereof is within 3-10 mm. Accordingly, the filling material is applicable to artificial turf.

Description

Technical Field [0001] The present invention relates to a wood powder filler for artificial turf and a method for manufacturing the wood powder filler for artificial turf.

The present invention relates to a filler for eco-friendly artificial turf based on wood flour matrix, and an artificial turf comprising the filler.

In synthetic artificial turf for sports, the filler material absorbs the impact of the athlete and is used as a means for ensuring a proper series of play, such as ball rolling, frying of the ball, speed change of the ball after the ball is bound to the ground, Is a material that is filled between. Artificial turf structure is a kind of artificial turf which is filled with rubber chips and sand to give a carpet-like artificial turf similar texture to natural turf. However, the hazard caused by the waste tire rubber chip used as artificial turf filler is emerging as a social issue. Particularly, since the waste tire rubber chip has a black color, it absorbs sunlight and raises the temperature of the ball so that the running environment can be deteriorated. In the summer when the temperature exceeds 30 ° C, there is a smell coming from the rubber chip, and the rubber chip melted in the hot geothermal heat may stick to it. In addition, due to the process characteristic of producing a waste tire chip by pulverization, the pulverized chip may be crushed during long-term use, causing dust to contaminate the periphery. Therefore, there is a growing demand for alternative materials to replace waste tires with synthetic grass fillers.

Accordingly, EPDM, which has been used recently, is used instead of a waste tire chip which is harmful. Korean Registered Utility Model No. 413557 discloses a soccer field artificial turf having a diameter of 0.3 to 1.0 mm and an EPDM (ethylene-propylene-diene monomer) chip or an SBR (styrene-butadiene rubber) chip having a particle diameter of 0.6 to 2.5 mm ≪ / RTI > However, in the case of SBR, 4 heavy metals, volatile organic compounds (VOC), polycyclic aromatic hydrocarbons and the like are produced due to the use of various crosslinking agents containing sulfur (S) in the production thereof and are harmful to human body. EPDM is relatively environmentally friendly However, it is expensive, and there is a problem in terms of stability of raw material supply. Further, in the case of a rubber chip made by crosslinking an EPDM rubber, it is essential that pulverization is performed to make a crosslinked material into a chip. Since this grinding chip generates dust after application, there is a problem of scattering, So that the cohesion force between the rubber chips is dispersed, so that the grass can not be properly supported.

Accordingly, it is urgent to develop a filler using a natural material that is harmless to the human body, which can replace the existing rubber chip and does not generate harmful substances such as heavy metals. In this connection, Korean Patent No. 1037137 discloses that wood powder can additionally be included in a filler composition for artificial turf so as to prevent slippage and to maintain dimensional stability. However, when it is contained in an amount of more than 3.0% by weight, the mixing property of the filler composition is lowered and the elasticity is lowered when the filler particles are formed. Therefore, the content of wood flour is 0.1 to 3.0 wt% % ≪ / RTI > In the case of the filler partially added with wood as described above, the content of wood powder contained in the filler is very small, and there is little difference in physical, especially environmental aspects from the known filler of the thermoplastic elastomer (TPE, SEBS) series.

 Accordingly, even if the artificial turf filler contains the wood flour containing not more than 3.0% by weight of wood flour as described above, it can not achieve the environment-friendly purpose. Accordingly, in the present invention, an attempt was made to produce a base material of a natural material base rather than a base material of a chemical material base containing a wood powder content of at least 40% or 50% or more in the filler material. We also wanted to develop a filling material that can be recycled as wood fuel, WPC raw material (wood deck, flooring molding material, etc.) even after the use as a filler.

The thermoplastic resin composition of the present invention comprises wood powder, styrene polymer, and olefin polymer according to the present invention, and contains 40 weight parts or more of wood powder based on 100 weight parts of the filler and is heated from room temperature to 900 DEG C or less, Lt; RTI ID = 0.0 > 3% < / RTI > by weight.

 Another object of the present invention is to provide a sandpaper layer laid on a base paper; And an elastic filler layer disposed on the sandstone layer and including a wood matrix matrix-based environmentally friendly synthetic turf filler.

The present inventors have made intensive efforts to replace a rubber chip using waste tires used in a conventional athletic field with a natural material which is harmless to a human body that does not generate toxic substances such as heavy metals. As a result, it has been found out that the filler, , And it was confirmed that 100% recycling was possible after the end of its service life, and that it can be regenerated environmentally.

As a result of analyzing the appearance and durability of the filler made of wood flour, no morphological deformation or development of iridescence was observed. Shore A hardness was 77 to 88, too hard or too soft, And it was confirmed that the degree of dust generation was good and the abrasion resistance was excellent. As a result of evaluating the shock absorption and vertical strain according to the filling amount, it was found that the shock absorbing property was 50% or more and the vertical strain rate was between 3 and 10 mm. Thus, the artificial turf system A-1 according to the quality standard of KS M 3888-1 Were satisfied. Accordingly, the thermogravimetric analysis (TGA) and the infrared (IR) spectrum of the filler were analyzed, and the weight reduction rate of the filler and the components thereof were analyzed to complete the present invention.

In order to attain the above object, the present invention provides a method for producing a thermoplastic resin composition comprising wood powder, a styrene polymer, and an olefin polymer, which comprises 40 weight parts or more of wood powder based on 100 weight parts of filler, And exhibits a weight reduction rate of at least 80 wt% at 900 DEG C during gravimetric analysis (TGA).

In the present invention, the term "wood flour matrix-based" means a structure in which the wood is well dispersed in the polymer matrix without phase separation between the wood and the polymer occupying more than 40 parts by weight of the filler in the polymer matrix.

In one embodiment of the present invention, thermogravimetric analysis (TGA) was performed to determine the weight reduction rate for each material constituting the filler and the filler. As a result, referring to FIG. 2 and Table 5, the weight loss rate was 80% by weight or more at 900 占 폚 in a thermogravimetric analysis (TGA) by heating from room temperature to 900 占 폚 or less. And showed a weight loss rate of less than 80 wt% at 800 ° C and a weight loss rate of less than 3 wt% at 200 ° C.

Accordingly, in the present invention, the filler may exhibit a weight reduction rate of less than 3 wt% at 200 ° C in thermogravimetric analysis (TGA) and a weight reduction rate of less than 80 wt% at 600 ° C in thermogravimetric analysis (TGA) And can exhibit a weight reduction rate of less than 80 wt% at 800 ° C in thermogravimetric analysis (TGA) and a weight reduction rate of more than 80 wt% at 900 ° C.

In the present invention, the wood flour may be at least one selected from the group consisting of soft wood flour, hardwood flour, rice hull flour, coconut fiber, flour (paper powder), and sucrose. Dry wood powder is used in the production of fillers, the moisture content can be up to 5% by weight, more specifically from 2 to 3% by weight. If the wood powder is not dried or the moisture content contained in the wood exceeds 5% by weight, it is difficult to form the filling material, and sufficient physical properties such as weak strength can not be obtained. The particle size of the dried wood powder itself may be between 100 μm and 850 μm. When the thickness is less than 100 탆, there may be problems such as abrasion resistance, shape deformation / stability, scattering of dust, and the like.

The wood-matrix-based filler for environmentally friendly artificial turf according to the present invention contains 40 parts by weight or more, specifically 50 parts by weight or more, more specifically 40 to 60 parts by weight or more of wood powder based on 100 parts by weight of filler, It is a matrix material based on wood flour, which is the main component of wood, which is recognized as timber by wood. It is harmless to human body without heavy metals.

Conventionally, it has been disclosed that wood powder can be further added to fillers for artificial turf. However, when wood powder is added in an amount exceeding 3.0% by weight, the mixing property of the filler composition is lowered, and when the filler particles are formed, It is known that the content of wood flour is preferably in the range of 0.1 to 3.0% by weight. However, in the present invention, the components constituting the filler having excellent Shore A hardness, excellent elasticity and abrasion resistance, and the blending ratios of the fillers are also disclosed, although the wood is the main component of the filler. According to the above-mentioned components and mixing ratio, there was no problem in the mixing property of the filler. When the filler particles were formed, the Shore A hardness was also suitable as a filling material and excellent in elasticity. In addition, all the requirements such as heat resistance, abrasion resistance and harmlessness to the human body required by the filler material were satisfied.

In one embodiment of the present invention, it was confirmed that the weight of wood flour at a temperature of 450 ° C was 80% by weight or less at the time of thermogravimetric analysis (TGA) by heating to 900 ° C or less at room temperature. Accordingly, in the present invention, the wood flour can exhibit a weight reduction rate of less than 80 wt% at 450 DEG C in thermogravimetric analysis (TGA).

In the present invention, the styrene-based polymer imparts an elasticity and an elastic restoring force, and functions as an elastomer in the filler of the present invention.

The styrenic polymer may be at least one selected from the group consisting of styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-butadiene-styrene copolymer (SBS), styrene-ethylene-propylene-styrene copolymer (SEPS), hydrogenated styrene-isoprene- (SEEPS), and a styrene-isoprene-styrene copolymer (SIS). Specific examples of the styrene-based block copolymer include styrene-ethylene-butadiene-styrene copolymer (SEBS).

The above-mentioned styrene-ethylene-butadiene-styrene (SEBS) is a material capable of realizing physical properties most similar to natural rubber, and absorbs paraffinic or paraffin-naphthenic mineral oil and has compatibility with olefinic elastomer . Styrene-ethylene-butadiene-styrene (SEBS) imparts resilience and elastic restoring force, and since it has a block structure, it plays a role of preventing crosslinking formation during compounding (compounding). Styrene-ethylene-butadiene-styrene (SEBS) is a three-dimensional structure consisting of an ethylene-butadiene soft segment connected between a styrene hard segment at both ends and a heavy segment. Styrene-ethylene-butadiene-styrene (SEBS) has a two-phase structure in which soft segments and soft segments are phase-separated. The styrene hard segment is a crystalline region that is not mixed with the ethylene-butadiene soft segment which is an amorphous region and forms a physical crosslink at room temperature and imparts mechanical properties (for example, tensile strength) and has a glass transition temperature (Tg) of about 100 / RTI > On the other hand, the ethylene-butadiene soft segment is a hydrophobic amorphous region that absorbs mineral oil and has a glass transition temperature (Tg) of about -55 ° C. The phase separation between the styrene hard segment and the ethylene-butadiene soft segment is attributed to the different solubility parameters (styrene-9.1, ethylene-butadiene-7.76) and the degree of phase separation affects the mechanical properties, rheological properties, It is advantageous.

The content of the styrene-ethylene-butadiene-styrene (SEBS) may be 10 to 40 parts by weight based on 100 parts by weight of the filler. It is a material that is excellent in durability, weatherability, and environmental friendliness among synthetic rubbers, but it is economically problematic when it is used over a proper amount of materials because it is relatively expensive material, such as elasticity and abrasion resistance.

In one embodiment of the present invention, it was confirmed that the styrene-ethylene-butadiene-styrene copolymer (SEBS), which is a styrene type polymer at the time of thermogravimetric analysis (TGA), exhibited a weight reduction rate of 99 wt% or more at 600 ° C. Thus, in the present invention, the styrene polymer may exhibit a weight reduction rate of 99 wt% or more at 600 DEG C in thermogravimetric analysis (TGA).

In the present invention, the olefin-based polymer functions as a curable polymer that determines the hardness of the filler.

The olefin-based polymer may be an ethylene-based resin, a propylene-based resin, or a mixed resin thereof. The olefinic polymer to be used in the present invention is one kind of curable polymer that determines hardness and is used for imparting light resistance, fluidity, inner surface and mechanical properties to a filler. The polyethylene resin may be a low-density polyethylene resin produced by the high-pressure method, an ethylene homopolymer produced by the medium-low-pressure method, or a low-density, medium-density and high-density polyethylene resin which is a copolymer of ethylene and an- The propylene resin includes a propylene homopolymer, a propylene-ethylene random copolymer, a propylene-ethylene block copolymer, and a copolymer resin containing propylene as a main component. In order to satisfy the artificial turf system quality standard of grade A-1 according to artificial turf KS M 3888-1: 2013 system quality standard, 1 to 20 parts by weight of olefin polymer may be contained based on 100 parts by weight of filler. When the amount of the olefinic polymer exceeds 20 parts by weight with respect to 100 parts by weight of the filler, soft elasticity is hardened and it becomes difficult to satisfy the impact absorbability such as safety performance.

In one embodiment of the present invention, it was confirmed that polypropylene, which is an olefin-based polymer at the time of thermogravimetric analysis (TGA), exhibited a weight loss rate of 99 wt% or more at 600 ° C. Thus, in the present invention, the olefin-based polymer may exhibit a weight reduction rate of 99 wt% or more at 600 ° C in thermogravimetric analysis (TGA).

In the present invention, the filler may further include at least one selected from the group consisting of process oil, inorganic filler, and ultraviolet stabilizer.

In the present invention, the process oil may be at least one selected from the group consisting of paraffinic, naphthenic, and aromatic process oils. The process oil secures processability at high temperature extrusion and ensures a uniformity of mixing between raw materials. The paraffinic oil improves the flow and color stability of the filler. However, durability problems (morphological deformation) occur when the amount is more than the proper amount, and oil bleeding phenomenon may occur during long-term outdoor exposure, resulting in shape distortion and aggregation, which causes a serious problem in heat resistance. The process oil may comprise 10 to 40 parts by weight of process oil relative to 100 parts by weight of the filler. When the amount is less than 10 parts by weight, the fluidity is poor and there is a problem in processing. If the amount is more than 40 parts by weight, an oil bleeding problem occurs.

In one embodiment of the present invention, paraffinic process oil during thermogravimetric analysis (TGA) showed a weight loss rate of at least 99 wt% at 500 < 0 > C. Thus, in the present invention, the process oil may exhibit a weight reduction rate of at least 99 wt% at 500 DEG C in thermogravimetric analysis (TGA).

In the present invention, the inorganic filler may be at least one selected from the group consisting of calcium carbonate, talc and mica. The filler has the effect of ensuring the stability of the finished product filler and enhancing the oil absorbency, as well as being able to perform an appropriate elastic function by using a non-toxic environmentally friendly material. The content of the filler may be 0 to 38 parts by weight, based on 100 parts by weight of the filler, of the inorganic filler. When the amount of the inorganic filler is more than 38 parts by weight based on 100 parts by weight of the filler, the wear resistance, durability, shape deformation, elasticity, etc., of the filler, It is difficult to achieve the desired performance with inorganic materials.

In one embodiment of the present invention, it was confirmed that calcium carbonate, which is an inorganic filler in thermogravimetric analysis (TGA), exhibited a weight reduction rate of less than 50 wt% at 800 ° C. Thus, in the present invention, the inorganic filler may exhibit a weight reduction rate of 50 wt% or less at 800 ° C in thermogravimetric analysis (TGA).

In the present invention, the filler may further include an antiwear agent, which may be an ultraviolet stabilizer, an antioxidant or a mixture thereof. The lubricant may be included in an amount of 0.5 to 1 part by weight based on 100 parts by weight of the filler. The UV stabilizer may be at least one stabilizer selected from the group consisting of Benzophenone, Benzotriazole and Hindered amine. The antioxidant may be a primary antioxidant such as Arylamine ), Phenol (Phenol), phosphorus (P) which is a secondary antioxidant, or sulfur (S) can be used. The ultraviolet stabilizer and antioxidant are added in small amounts based on the weight of the filler material to impart weatherability to chemical high molecular substances such as styrene copolymers such as SEBS and olefin polymers such as PP.

In one embodiment of the present invention, it was confirmed that the ultraviolet stabilizer at the time of thermogravimetric analysis (TGA) exhibited a weight reduction rate of at least 99 wt% at 650 ° C. Thus, in the present invention, the ultraviolet stabilizer may exhibit a weight reduction rate of at least 99 wt% at 650 DEG C in thermogravimetric analysis (TGA).

In the present invention, the filler may further include a pigment, and 0.5 to 1 part by weight of the pigment may be added to 100 parts by weight of the wood flour. The pigment plays a role of expressing a desired color by coloring. Any inorganic pigment may be used as long as it is known in the art, and if it exceeds 1 part by weight, it is uneconomical in terms of efficiency.

In the present invention, the filler comprises 40 to 60 parts by weight of wood powder, 10 to 40 parts by weight of the styrene polymer, and 1 to 20 parts by weight of the olefin polymer, 10 to 40 parts by weight of the process oil, and 0 to 38 parts by weight of the inorganic filler .

Specifically, the filler material may have a Shore A hardness of 77-88, and more specifically, a Shore A hardness of 77-79. In one embodiment of the present invention, the fillers of Examples 1 to 5 were found to have a Shore A hardness of 77-88. Further, the filler has a Shore A hardness of 77 to 88, and a phenomenon such as appearance deformation, irregularity and the like is not observed.

In the present invention, the styrene type polymer and the olefin type polymer may be in a weight ratio of 10 to 40: 1 to 20, and more specifically 10 to 25: 5 to 10. When the styrene-based polymer and the olefin-based polymer are out of the above ratio, it is difficult to impart proper elasticity and hardness to the filler. That is, they are too hard to break, crumble or clump together.

In the present invention, the filler has a particle size with an average diameter of 1.4 to 3.35 mm. When the size of the filler is less than 1.4 mm, the effect as a filler is deteriorated and a buffering effect is not developed. Therefore, there is a problem that joints such as a knee are easily damaged during exercise and the surface is slippery. Is scattered into the air and is inhaled into the respiratory system of the human body. If it is more than 3.35 mm, the filler effect is not exerted, and it is difficult to apply filler to artificial turf, and the surface is roughly formed, which may cause skin damage when a user of artificial turf falls. In addition, since the particle shape of the wood powder for eco-friendly artificial turf according to the present invention is formed in an elliptical shape and uniform size, dust due to mechanical friction is not generated, the coefficient of friction is also smaller, and the elasticity is increased.

According to the embodiments and the test examples, unlike the conventional pulverized waste tire, the filler material for a green wood artificial grass based on the wood powder matrix according to the present invention can be used as a raw material for a tire such as lead (Pb), cadmium (Cd), chromium (Cr) Hg) were not detected. In addition, the hardness was 77-88, and the appearance of shape deformation, irregularity and the like were not observed, and the oil-bleeding phenomenon was not observed and the heat resistance was excellent. As a result of evaluating Lisport Wear Tester after the application of the filler, it was confirmed that it was possible to use it as a filling material for environmentally friendly artificial turf based on wood flour matrix by confirming that there was no shape deformation and dust generation was good and excellent abrasion resistance. As a result of evaluating the shock absorption and vertical strain according to the filling amount, the impact absorbing property was more than 50%, and the vertical strain was between 3 and 10 mm, so that artificial turf A- 1 grade.

In one embodiment of the present invention, the components of each material constituting the filler and the filler were analyzed by Fourier transform infrared spectroscopy (FT-IR). As a result, in the FT-IR spectrum, the filler was an oil or a styrene-ethylene-butadiene-styrene copolymer (SEBS), wood powder was cellulose, a styrene polymer was a styrene-ethylene-butadiene-styrene copolymer (SEBS) Polypropylene (PP) or polyethylene (PE) as the process oil, or calcium carbonate as the inorganic filler.

In order to achieve the above object, the present invention provides a method for producing a dried wood powder, comprising: (1) preparing a dried wood powder having a moisture content of 2 to 3% by weight; (2) adding a first raw material containing a styrene type polymer to a blender and preheating the same; A step (3) of adding an olefinic polymer and a second raw material containing wood powder to the first raw material and stirring the mixture to prepare an extrudate mixture; And a step (4) of air-cooling the extrudate mixture by using an extruder, wherein the filler material is at least 40 parts by weight based on 100 parts by weight of the filler, The present invention also provides a method for producing a filler.

First, in step (1) of preparing dried wood flour, the wood itself has hygroscopic properties, which can cause a lot of problems in extrusion molding. Therefore, in the present invention using wood flour as a main material, a step of drying wood flour is essential and must be accompanied by an extrusion process. The moisture content of the dried wood powder may be 5 wt% or less, more specifically 2 to 3 wt%. When the moisture content contained in the wood powder is more than 5% by weight, it is difficult to form the filler and the strength is weak, so that sufficient physical properties can not be obtained.

Next, in the preheating step (2), the first raw material containing the styrene type polymer is charged into the blender and preheated. In the step (2), a preheating process in which a raw material containing the styrene-based polymer is put into a blender and preheated at a temperature of 60 to 100 ° C; And a softening process in which the process oil is further added to the preheated raw material and mixed at a stirring speed of 20 to 100 rpm for 1 to 20 minutes. The first raw material may be preheated at 60 to 100 ° C for 1 to 20 minutes by adding 10 to 40 parts by weight of the styrene polymer to 100 parts by weight of the filler.

The mixing machine may be a general mixing extruder. Preferably, a mixing extruder such as a vender kneader, a twin screw extruder, a Buss kneader, and a Banbury mixer may be used. , A continuous extruder is more preferable than a batch type extruder.

If the preheating temperature is lower than 60 ° C, mixing and reaction may become insufficient in subsequent steps. If the preheating temperature is higher than 100 ° C, the styrene polymer may be decomposed or the styrene polymer may react with the process oil There is a problem that can not be done.

The preheating time for 1 to 20 minutes is an optimum time condition derived through experiment to form a state for facilitating the polymerization of the styrene type polymer and the bonding with the process oil and the olefin type polymer to be added.

The softening step is a step of applying 10 to 40 parts by weight of process oil to impart elasticity and plasticity to the styrene polymer as the first raw material. The stirring speed is low, preferably 20 to 100 rpm, more preferably 40 To 80 rpm for 1 minute to 20 minutes. The stirring at such a low speed is intended to ensure that the process oil is sufficiently reacted with the styrenic polymer.

The step (3) of producing the extrusion mixture is a step of adding an olefin polymer and a second raw material containing wood powder to the first raw material and stirring the mixture to prepare an extrusion mixture. The stirring may be carried out at a stirring speed of 20 to 100 rpm for 1 to 20 minutes. In the blender, 1 to 20 parts by weight of an olefin-based polymer, 40 to 60 parts by weight of wood powder, 0 to 38 parts by weight of an inorganic filler, And the mixture is stirred for 1 to 20 minutes at a stirring speed of 20 to 100 rpm to prepare a mixture for extrusion.

 The step (3) of preparing the extrusion mixture may be carried out in order to improve the elasticity and impact resistance of the styrene polymer as the first raw material and the mechanical properties such as the olefin polymer as the second raw material by efficient mixing And to provide a filling material for environmentally friendly artificial turf based on wood flour matrix by adding dried wood flour. In addition, an inorganic filler, an ultraviolet stabilizer and the like are suitably mixed with this to express the optimum characteristics.

The step (4) of extruding air cooling is a step of extruding air-cooling the extrusion mixture by using an extruder. The mixture is extruded at a temperature of 120 to 250 ° C. using an extruder to be molded step; And cooling the extruded filler material simultaneously with the extrusion molding step with air and cutting the extruded filler material into an average diameter of 1.4 to 3.35 mm.

In the extrusion air cooling molding step (4), the components in the blender are subjected to a training and heat treatment under a high shear stress such as a twin-screw extruder heated at 120 to 250 ° C, a booster kneader, etc. to obtain desired physical properties and uniformity More specifically, the temperature is controlled to be completely heat treated in consideration of the residence time at a temperature range of 170 to 230 ° C. The agitation speed is set to 100 to 300 rpm, specifically, 150 to 150 rpm. When the agitation speed is less than 100 rpm, the materials constituting the composition may be agglomerated. When the agitation speed is more than 300 rpm, there is a disadvantage that sufficient reaction between the substances does not occur and it is not economical.

At the same time as the extrusion molding, the artificial turf wood filling material extruded and air-cooled can be cooled using air. In addition, as the filler material is mainly composed of wood powder, the method itself after extrusion should be made of an air-cooled type cutter, not a water-cooled type that cuts and crushes water, which is a method for making a conventional filler chip.

The term " air cooling " means cooling the extruded blend with air, using air as the cooling medium. It can be divided into natural air cooling using air convection, and forced air cooling using forced fan to make air flow. It is a cooling method in which air is allowed to flow and cooled. No cooling water is required, and there is no need to cool, cut, and crush in water.

In the step (4), the extruded formulations may be cooled and dried using air, and further cut into a particle size having an average diameter of 1.4 to 3.35 mm.

Here, cooling and cutting are advantageous in mass production because they do not undergo pulverization process as compared with producing fillers for artificial turf using general waste rubber.

In yet another aspect, the present invention provides a method for preparing a compound of formula A sand layer disposed on the substrate; And an elastic filler layer disposed on the sandstone layer and including a filler material for environmentally friendly artificial turf based on the wood flour matrix of claim 1.

Referring to FIG. 25, artificial turf according to an embodiment of the present invention is formed to include a base paper 110, a sand paper layer 120, a filler layer 130, and a synthetic pile 140 .

The bubble 110 is a portion that fixes the artificial grass file 140. The base paper 110 is formed in a wide flat plate shape. In the case of a fiber base paper, the base paper 110 may be formed of polypropylene (PP), and may be double or triple reinforced. In addition, the fibrous base paper is subjected to a polymer resin coating treatment so that the fiber base paper can receive the force. The base paper 110 is made of polyester or polypropylene, and may be made water-permeable.

The silica sand layer 120 is formed on the upper surface of the base paper 110. The siliceous layer may have a silicon dioxide (SiO 2) content of 85% or more and a particle size of about 0.3 to 1.0 mm. However, the composition and the particle size of the silica sand layer 120 are not limited thereto. In addition, the thickness of the silica sand layer 120 may be about 15 to 30 mm.

The filler layer 130 is formed on top of the sandstone layer 120. The filler layer 130 is provided to provide a buffering force at the bottom, and has elasticity. In the present invention, it is possible to use a filler layer including an artificial grass filler based on the wood matrix. The filler layer 130 may be formed into a particle shape having a constant size of 1.4 to 3.35 mm in order to improve drainage and enhance buffering force.

It has been confirmed that the filler for artificial turf based on wood flour produced using wood flour according to the present invention is harmless to the human body without generating heavy metals and 100% recycled after the end of its service life, .

In addition, the appearance and durability of the filler made from wood flour were evaluated. As a result, no deformation such as shape deformation or iridescence was observed, and the hardness was not too hard or too hard at 77-88, And it was confirmed that the degree of dust generation was good and the abrasion resistance was excellent. As a result of evaluating the shock absorption and vertical strain according to the filling amount, the impact absorbing property was more than 50%, and the vertical strain was between 3 and 10 mm, so that artificial turf A- 1 grade, it can be applied as an environmentally friendly artificial turf filler.

1 is a view illustrating a filling material for artificial turf according to the present invention.
FIG. 2 is a graph showing the weight loss rate of the artificial grass filler based on wood flour matrix of the present invention by thermogravimetric analysis.
FIG. 3 is a graph showing the weight reduction rate of wood flour by thermogravimetric analysis, which is a component of a wood-matrix-based environmentally friendly artificial grass filler according to the present invention.
FIG. 4 is a graph showing a weight reduction rate of a styrene polymer as a component of a wood-matrix-based environmentally friendly artificial turf filler according to the present invention by thermogravimetric analysis.
FIG. 5 is a graph showing a weight reduction rate of an olefin polymer as a constituent of a green artificial turf-based filler based on wood flour matrix of the present invention by thermogravimetric analysis.
FIG. 6 is a graph showing the weight reduction rate of the process oil as a constituent of the filler for eco-friendly lawn based on wood flour matrix of the present invention by thermogravimetric analysis.
FIG. 7 is a graph showing the weight reduction rate of the inorganic filler, which is a component of the wood-matrix-based green artificial grass filler according to the present invention, by thermogravimetric analysis.
FIG. 8 is a graph showing the weight loss rate of the ultraviolet light stabilizer, which is a component of the wood-matrix-based environmentally friendly artificial turf filler according to the present invention, by thermogravimetric analysis.
FIG. 9 and FIG. 10 show the results of IR spectroscopy and search results of the filler for artificial turf of the present invention.
Figs. 11 and 12 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of wood flour, which is a component of the filler for artificial turf of the present invention.
13 and 14 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the styrenic polymer of the present invention.
15 and 16 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the olefin polymer of the present invention.
17 and 18 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results of the process oil of the present invention and the results of the search.
19 and 20 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the inorganic filler of the present invention.
FIGS. 21 and 22 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the filler for artificial turf of the present invention.
23 is a comparative analysis of the FT-IR spectra of the filler material pretreated with toluene and wood flour.
24 is a comparative analysis of the FT-IR spectra of the calcium carbonate (CaCo3) and the final product of the filler pretreated with toluene.
25 is a sectional view of artificial turf of the present invention.

Hereinafter, the present invention will be described in more detail by way of examples. However, the following examples are illustrative of the present invention, and the contents of the present invention are not limited to the following examples.

Comparative Example  One

40 parts by weight of wood powder, 15 parts by weight of CaCo3, 21 parts by weight of polypropylene (PP), 11 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 11.5 parts by weight based on 100 parts by weight of filler, And 12.5 parts by weight of process oil were prepared.

The prepared wood powder itself had hygroscopic properties and was dried beforehand due to the properties of moisture absorption and the like during extrusion, so that the water content was adjusted to 3 wt% by weight. First, 11.5 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) as a first raw material was charged into a compounding machine and preheated at a temperature of 60 to 100 DEG C for 10 minutes. Then, 12.5 parts by weight of the process oil was added while the first raw material was mixed in the blender, and the mixture was stirred at a stirring speed of 20 to 100 rpm for 1 to 20 minutes. Next, 21 parts by weight of polypropylene, 15 parts by weight of CaCo3, and 40 parts by weight of dried wood powder were added and stirred. Thereafter, the mixture containing the first raw material and the second raw material was extruded at an extruder at a temperature of 120 to 250 ° C and molded. Simultaneously with the extrusion molding, the extrusion-molded compound was cooled with air and cut into a size of 1.4 to 3.35 mm in diameter to prepare a cylinder-shaped artificial turf filler.

Comparative Example  2

70 parts by weight of wood powder, 10 parts by weight of CaCo3, 19 parts by weight of polypropylene (PP), 100 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 0 , 0 part by weight of process oil and 1 part by weight of pigment were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Comparative Example  3

50 parts by weight of wood powder, 8 parts by weight of CaCo3, 10 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 4 , 28 parts by weight of process oil and 0.5 parts by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Comparative Example  4

50 parts by weight of wood powder, 8 parts by weight of CaCo3, 13 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 4 , 25 parts by weight of process oil and 0.5 parts by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Comparative Example  5

50 parts by weight of wood powder, 8 parts by weight of CaCo 3, 13 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 8 , 21 parts by weight of process oil and 0.5 parts by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Example  One

50 parts by weight of wood powder, 8 parts by weight of CaCo3, 6 parts by weight of polypropylene (PP), 15 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 15 , 21 parts by weight of process oil and 0.5 parts by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Example  2

50 parts by weight of wood powder, 8 parts by weight of CaCo3, 6 parts by weight of polypropylene (PP), 15 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 15 , 19 parts by weight of process oil and 0.5 part by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Example  3

50 parts by weight of wood powder, 8 parts by weight of CaCo3, 6 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 22 , 14 parts by weight of a process oil and 0.5 parts by weight of an ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Example  4

50 parts by weight of wood powder, 10 parts by weight of CaCo3, 7 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 21 , 11 parts by weight of process oil and 1 part by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Example  5

40 parts by weight of wood powder, 18 parts by weight of CaCo3, 6 parts by weight of polypropylene (PP), 10 parts by weight of styrene-ethylene-butadiene-styrene (SEBS) 21 14 parts by weight of process oil and 1 part by weight of ultraviolet stabilizer were prepared.

The synthetic grass filler was prepared in the same manner as in Comparative Example 1 except for the composition and content of the synthetic grass filler.

Filler content for artificial turf (based on 100 parts by weight filler) Weight portion Wood flour Inorganic filler (Caco3) The olefinic polymer (PP) The styrene polymer (SEBS) Process oil Pigment Others (UV: ultraviolet stabilizer) Comparative Example 1 40 15 21 11.5 12.5 0 0 Comparative Example 2 70 10 19 0 0 One 0 Comparative Example 3 50 8 10 4 28 0 0.5 Comparative Example 4 50 8 13 4 25 0 0.5 Comparative Example 5 50 8 13 8 21 0 0.5 Example 1 50 8 6 15 21 0 0.5 Example 2 50 8 6 15 19 0 0.5 Example 3 50 8 6 22 14 0 0.5 Example 4 50 10 7 21 11 0 One Example 5 40 18 6 21 14 0 One

[ Test Example  1] Property evaluation

The physical properties of the synthetic grass fillers of Comparative Examples 1 to 5 and Examples 1 to 5 were evaluated. The apparent density and hardness are shown in Table 2. As a result, in Comparative Examples 1 and 2, the Shore A hardness was too high and the hardness was too low in Comparative Example 3. However, in the case of the fillers of Examples 1 to 5 of the present invention, Shore A hardness was 77-88, which was suitable for being applied as a filler.

Physical properties, hazard, durability, heat resistance, Spec Hazard
(Below standard) durability Heat resistance Abrasion Apparent density (g / m 3) Hardness (shore A) 4 Major metals (mg / kg)
(Pb 90, Cd 50, Cr ⁶⁺ 25, Hg 25) Appearance (Ibarry, shape deformation, etc.) / presence of smell Surface hardening / Resilience / Oil migration Morphological transformation
10,000 times Dust generation
10,000 times Comparative Example 1 680 95 ~ 96 Non-detection clear/
Odor 1-2 clear △ × Comparative Example 2 600 98 Pb: 49 to 59 ppm clear/
Odor Class III clear ◎ × Comparative Example 3 520 52 to 55 Non-detection Kernel size irregular and crumbly / odor 1-2 grade Oil Bleeding × (squashed and clumped together) △ Comparative Example 4 620 71 ~ 73 Non-detection No abnormality / odor 1-2 grade Oil Bleeding × (squashed and clumped together) △ Comparative Example 5 610 73 ~ 75 Non-detection No abnormality / odor 1-2 grade Oil Bleeding Weak X (somewhat improved than Comparative Examples 3 and 4) (Slightly worse than Comparative Examples 3 and 4) Example 1 580 87 to 88 Non-detection No abnormality / odor 4-5 No abnormality (improved oil bleeding) ◎ ◎ Example 2 540 87 to 88 Non-detection No abnormality / odor 4-5 No abnormality (improved oil bleeding) ◎ ◎ Example 3 530 87 to 88 Non-detection No abnormality / odor 4-5 No abnormality (improved oil bleeding) ◎ ◎ Example 4 470 77 to 79 Non-detection No abnormality / odor 4-5 clear ◎ ◎ Example 5 590 79 to 81 Non-detection No abnormality / odor 4-5 clear ◎ ◎

* 4 Major metal standard: Pb 90 or less, Cd 50 or less, Cr6 + 25 or less, Hg 25 or less

* Criteria of shape deformation ratio: The original shape is evaluated based on the degree of collapsing or sticking together. If the shape is not deformed or good, it is marked as ◎, if the shape deformation is small or in progress, marked as △. Marked with X

* In case of good dust emission, mark as ◎, when dust dust is small, mark as △, dust is generated.

* Evaluation criteria of odor: It was judged by the experienced experimenters in the evaluation of the filler material by the sensory evaluation. When the smell is good, it is indicated as 4-5 grade, when the smell is medium, it is grade 3,

[Test Example 2] Appearance and durability evaluation

The appearance and durability of the synthetic grass fillers of Comparative Examples 1 to 5 and Examples 1 to 5 were analyzed. As a result, as shown in Table 2, in the case of Comparative Examples 1 to 5, the odor and irregularity of the granules were large and the debris was large. However, the fillers of Examples 1 to 5 of the present invention were apparently deformed, No development was observed and it was confirmed that the durability was excellent.

[ Test Example  3] Human body Harmless  A rating

Table 2 shows the evaluation of human harmlessness by analyzing the detection of four heavy metals of the synthetic grass fillers of Comparative Examples 1 to 5 and Examples 1 to 5. As a result, in the case of Comparative Example 2, lead was detected, but it was confirmed that the fillers of Examples 1 to 5 of the present invention were not harmful to the human body because no four heavy metals were detected at all.

[ Test Example  4] Evaluation of heat resistance

The surface hardening / restoring force / oil migration and the like of the filler pellets for artificial turf of Comparative Examples 1 to 5 and Examples 1 to 5 were analyzed to evaluate heat resistance. As a result, in the case of Comparative Examples 3 to 5, oil bleeding was observed, but in the case of the fillers of Examples 1 to 5 of the present invention, oil bleeding was not observed and it was confirmed that heat resistance was excellent.

 [ Test Example  5] Filler  Abrasion resistance after construction ( Lisport  Wear Tester

The abrasion resistance of the fillers for artificial turf of Comparative Examples 1 to 5 and Examples 1 to 5 was tested 10,000 times using Lisport Wear Tester, and morphological deformation and occurrence of dust were evaluated. The morphological deformation is represented by a maximum of 100% and a minimum of 0%. As a result, as shown in Table 2, as compared with Comparative Examples 1 to 5, the filler materials of Examples 1 to 5 of the present invention were not deformed in shape, and dust generation was good, and thus it was confirmed that the wear resistance was excellent. Further, in the case of Comparative Examples 3 to 4, the hardness was low, and as a result, the result of abrasion resistance test was defeated and a phenomenon of aggregation was observed.

[ Test Example  6] In filling  Impact absorption and vertical strain evaluation

The impact absorbency (%) and the vertical strain (mm) of the artificial turf filler materials of Comparative Examples 1 to 5 and Examples 1 to 5 were evaluated together with silica sand. Artificial turf system According to KS M 3888-1: 2013 quality standard, it is required to meet A-1 grade for general soccer field, satisfies the above-mentioned quality standard when shock absorption is over 50% and vertical strain is 3-10mm .

Thus, in Test Example 6, silica sand and the filler of the present invention were planted with kg shown in Table 3 per unit area (m2), and an artificial turf pile was planted, and the impact absorbability and the vertical strain were evaluated. As a result, unlike Comparative Examples 1 to 5, in the case of Examples 1 to 5, both the impact absorbability and the vertical strain satisfied the quality standards. In particular, it was confirmed that both the shock absorbing property and the vertical strain were excellent in the case of silica sand 18 kg / m 2 to 30 kg / m 2 and the filler 10 kg / m 2 to 13 kg / m 2.

[ Test Example  7] Thermogravimetry ( Thermogravimetric  Analysis, TGA ) To measure the weight reduction rate

Thermogravimetric analysis (TGA) was carried out to determine the weight loss ratio of each material constituting the filler and the filler of Example 4, and the results are shown in FIGS. 2 to 8.

Samples were produced in sizes that could be mounted on a thermogravimetric analyzer (equipment name: TA, TGA Q50 model). The empty Sample Pan (Pt pan) is zeroed (called Tare). When the machine was tared, we put 10mg of sample in Pan. The sample was prepared by cutting a sample (diameter * height = 0.1 mm * 0.1 mm) in the form of a disk cut using a knife as a general TGA sample preparation method and placing it in the center of a platinum pan of a thermogravimetric analyzer. A temperature raising rate of 20 ° C / min and a temperature range of room temperature to 900 ° C were set, and data storage positions were previously specified. Then, the pyrolysis execution step, that is, the pyrolysis program according to the present invention was executed in the thermogravimetric analyzer (TGA), and the data was analyzed when the execution was completed.

The pyrolysis program was run under the following conditions, and the temperature was raised from room temperature to 900 DEG C under a nitrogen atmosphere at a heating rate of 20 DEG C / min. At this time, if the temperature increase rate is faster than 20 ° C / min, the decomposition is abruptly made, and the specimen may be ignited or the amount of carbonization may be greatly increased. If it is slower than 20 ° C / min, Therefore, the temperature was maintained at a rate of 20 ° C / min when the temperature was raised.

FIGS. 2 and 5 show weight reduction ratios by the thermogravimetric analysis of the wood-matrix-based green artificial turf filler of the present invention. As a result, referring to FIG. 2 and Table 5, it was found that by heating at room temperature to 900 ° C. or less, the weight loss rate at 200 ° C. was 3 wt% or less at the time of thermogravimetric analysis (TGA) And a weight reduction rate of 80 wt% or less was confirmed at 800 ° C. Further, it was confirmed that the weight loss rate at 900 ° C was 80 wt% or more. Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Heating temperature Weight reduction rate (%) 200 2.467 435.94 51.707 502.52 70.877 599.37 74.057 659.9 75.788 891.19 84.999

FIG. 3 and Table 6 show weight reduction ratios of wood flour, which is a component of the wood-matrix-based environmentally friendly artificial turf filler of the present invention, by thermogravimetric analysis. As a result, referring to FIG. 3 and Table 6, it was confirmed that the weight of wood flour was reduced to 80% by weight or less at 450 DEG C by thermogravimetric analysis (TGA) by heating from room temperature to 900 DEG C or less. Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 199.87 7.63 451.07 77.96 890.93 86.036

FIGS. 4 and 7 show weight reduction ratios by thermogravimetric analysis of the styrene polymer, which is a component of the wood-matrix-based environmentally friendly artificial turf filler of the present invention. 4 and 7, the styrene-ethylene-butadiene-styrene copolymer (SEBS), which is a styrene-based polymer at the time of thermogravimetric analysis (TGA) It was confirmed that the weight reduction rate was at least% by weight. Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 524.72 99.03

FIG. 5 and Table 8 show weight reduction ratios by thermogravimetric analysis of the olefinic polymer, which is a component of the wood-matrix-based green artificial turf filler of the present invention. As a result, referring to FIG. 5 and Table 8, it was confirmed that the polypropylene which is an olefinic polymer at the time of thermogravimetric analysis (TGA) was heated to a temperature of 900 DEG C or less at room temperature and showed a weight reduction rate of 99 wt% or more at 600 DEG C . Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 527.98 99.82

FIG. 6 and Table 9 show weight reduction ratios by thermogravimetric analysis of the process oil, which is a constituent of the wood-matrix-based environmentally friendly artificial turf filler of the present invention. As a result, referring to FIG. 6 and Table 9, it was confirmed that the paraffinic process oil exhibited a weight reduction rate of at least 99% by weight at 500 DEG C by thermogravimetric analysis (TGA) by heating from room temperature to 900 DEG C or less. Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 469.22 99.98

FIGS. 7 and 10 show weight reduction ratios by thermogravimetric analysis of the inorganic filler, which is a component of the wood-matrix-based environmentally friendly artificial turf filler of the present invention. As a result, referring to FIG. 7 and Table 10, it was confirmed that the calcium carbonate, which is an inorganic filler at the time of thermogravimetric analysis (TGA), was heated to 900 ° C or less at room temperature and showed a weight reduction rate of less than 50 wt% . Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 805.18 45.08

FIG. 8 and Table 11 show weight reduction ratios by thermogravimetric analysis of ultraviolet stabilizer, which is a constituent of the wood-matrix-based green artificial turf filler of the present invention. As a result, referring to FIG. 8 and Table 11, it was confirmed that the ultraviolet light stabilizer exhibited a weight reduction rate of at least 99% by weight at 650 DEG C by thermogravimetric analysis (TGA) by heating from room temperature to 900 DEG C or less. Also, it was confirmed that the weight reduction rate as shown in the following table was shown at the heating temperature point.

Temperature Weight reduction rate (%) 600.38 99.17

[ Test Example  8] Fourier Transform Infrared Spectroscopy (FT-IR) analysis

Next, FT-IR (Fourier Transform Infrared Spectroscopy) analyzes the components of each material constituting the filler and filler of Example 4, and these are shown in FIGS. 9 to 20.

Fourier Transform Infrared Spectroscopy (FT-IR) analysis was performed using a Varian Scimitar 1000 model. The measurement conditions were as follows.

1) Measurement mode: ATR mode

2) Temperature condition: room temperature

3) Use Custom: 650 ~ 4000cm-1

4) Sample: natural filler, 1EA

The measurement method is as follows.

1) Alignment and calibration were performed after starting the equipment.

2) After calibration, the background of ATR was measured and stored.

3) Put the sample to be measured in the sample compartment.

4) Start button was executed, spectrum data was saved, and the components of the sample were confirmed using library search.

FIG. 9 and FIG. 10 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the filler for artificial turf of the present invention. As a result, the spectrum of the filler was as shown in FIG. 9, and it was analyzed as a result of a library search to be oil or styrene-ethylene-butadiene-styrene copolymer (SEBS).

Figs. 11 and 12 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of wood flour, which is a component of the filler for artificial turf of the present invention. As a result, the spectrum of the wood flour was as shown in Fig. 11, and the wood flour of the wood flour was analyzed to be cellulose.

13 and 14 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the styrenic polymer of the present invention. As a result, the spectrum of the styrene polymer was as shown in FIG. 13, and the results of a library search showed that the styrene-ethylene-butadiene-styrene copolymer (SEBS), which is a styrene polymer, was a styrene-ethylene-butadiene-styrene copolymer .

15 and 16 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the olefinic polymer of the present invention. As a result, the spectrum of the olefin-based polymer was as shown in Fig. 15, and the result of a library search was that polypropylene (PP), which is an olefinic polymer, was polypropylene (PP).

17 and 18 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results of the process oil of the present invention and the results of the search. As a result, the spectrum of the process oil was as shown in Fig. 17, and the paraffinic process oil was analyzed to be polypropylene (PP) or polyethylene (PE) as a result of a library search.

19 and 20 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the inorganic filler of the present invention. As a result, the spectrum of the inorganic filler is as shown in Fig. 19, and the calcium carbonate as the inorganic filler was analyzed to be calcium carbonate as a result of a library search.

[ Test Example  9] Filler  FT-IR (Fourier Transform Infrared Spectroscopy) analysis

After the filling material of Example 4 was immersed in toluene, FT-IR (Fourier Transform Infrared Spectroscopy) was performed to analyze the filling material, which is shown in FIGS. 21 to 24. The filler is a structure formed by physically mixing and mixing wood powder, calcium carbonate, SEBS, oil, and other materials. When the wood is mixed and solidified by SEBS, the IR characterization of the surface characteristics of the sample is dominant. Due to the characteristics of the machine, the wood grain peak will not appear. As a result, the peak corresponding to the hydroxyl group (-OH) of the characteristic peak (around 3300) of the wood powder was not shown although the FT-IR analysis results of the finished product of the filler material included the wood. Therefore, it is possible to remove the adhesive component by using toluene as a solvent of the adhesive component material which has been stirred with SEBS, oil, etc., and the hydroxyl group (-OH) of characteristic peak (about 3300) of wood powder during FT- Respectively.

First, the pretreatment method of the filler sample is as follows.

1) Filling material 10 g of the finished product sample was placed in a 400 ml glass bottle.

2) 120 ml of toluene was added to the glass bottle containing the sample and immersed for 24 hours.

3) After 24 hours, the filter paper was used to remove the extracted material and the remaining material was collected. 4) and then dried in an oven at 100 DEG C for 2 hours.

5) The dried samples were collected and analyzed by IR equipment.

Fourier Transform Infrared Spectroscopy (FT-IR) analysis was performed using a Varian Scimitar 1000 model. The measurement conditions were as follows.

1) Measurement mode: ATR mode

2) Temperature condition: room temperature

3) Use Custom: 650 ~ 4000cm-1

4) Sample: natural filler, 1EA

The measurement method is as follows.

1) Alignment and calibration were performed after starting the equipment.

2) After calibration, the background of ATR was measured and stored.

3) Put the sample to be measured in the sample compartment.

4) Start button was executed, spectrum data was saved, and the components of the sample were confirmed using library search.

FIGS. 21 and 22 show FT-IR (Fourier Transform Infrared Spectroscopy) analysis results and search results of the filler for artificial turf of the present invention. As a result, the filling material was analyzed with cast coated paper C-1-2 coated side. It was confirmed that the characteristic peaks of wood powder, -OH peak, were observed near 3300 cm -1 by toluene pretreatment.

[ Test Example  10] Filler  Pretreatment and Fourier Transform Infrared Spectroscopy (FT-IR) analysis

Next, the FT-IR spectrum of the filler finished product and wood flour of Example 4 pretreated with toluene was compared and analyzed. 23 is a comparative analysis of the FT-IR spectra of the filler material pretreated with toluene and wood flour. As a result, the filling material pretreated with toluene exhibited a peak between 3500 and 3000 cm-1 as in the case of blue-colored wood, and peaks superimposed between the wood and 1200 to 900 cm-1.

Next, the FT-IR spectra of the calcium carbonate (CaCo3) and the finished product of the pretreated filler were compared and analyzed. 24 is a comparative analysis of the FT-IR spectra of the calcium carbonate (CaCo3) and the final product of the filler pretreated with toluene. As a result, the filling material pretreated with toluene showed a peak between 1450 and 1250 cm-1 similarly to calcium carbonate (CaCo3) shown in sky blue, and a peak between calcium carbonate (CaCo3) and 900-800 cm-1 And peak at around 600 cm < -1 >.

From the above description, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. In this regard, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention without departing from the scope of the present invention as defined by the appended claims.

100 - Artificial turf, 110 - Geoforge, 120 - Silica layer
130 - Filler layer for environmentally friendly artificial turf, 140 - Artificial grass file

Claims (18)

In a filling material for artificial turf,
Wherein the synthetic grass filler comprises 40 to 60 parts by weight of wood powder;
Butadiene-styrene copolymers (SEBS), styrene-butadiene-styrene copolymers (SBS), styrene-ethylene-propylene-styrene copolymers (SEPS), and hydrogenated styrene-isoprene- 10 to 40 parts by weight of at least one styrenic polymer selected from styrene-isoprene-styrene copolymer (SIS);
1 to 20 parts by weight of an olefinic polymer of an ethylene-based resin, a propylene-based resin, or a mixed resin thereof;
10 to 40 parts by weight of at least one process oil selected from the group consisting of paraffinic, naphthenic, and aromatic process oils; And
1 to 38 parts by weight of at least one inorganic filler selected from the group consisting of calcium carbonate, activated, and mica,
The artificial turf filler is heated to a temperature of 900 ° C or less at room temperature to exhibit a weight reduction rate of 80 wt% or more at 900 ° C in thermogravimetric analysis (TGA)
Styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-ethylene-butadiene-styrene copolymer (SEBS), wood flour and cellulose are examples of the fillers for the synthetic turf in an infrared (IR) Wherein the polymer is polypropylene, the process oil is polypropylene (PP) or polyethylene (PE), or the inorganic filler is calcium carbonate. The filling material for artificial turf grass according to claim 1, wherein the artificial turf filler exhibits a weight reduction rate of less than 80% by weight at 600 ° C in thermogravimetric analysis (TGA). 2. The method of claim 1, wherein the synthetic grass filler exhibits a weight loss rate of less than 80 weight percent at 800 DEG C in a thermogravimetric analysis (TGA) or a weight loss rate of less than 3 weight percent at 200 DEG C. Matrix-based green artificial turf filler. The filler material for artificial turf based on wood flour according to claim 1, wherein the wood flour is at least one selected from the group consisting of softwood lumber, hardwood lumber, rice hull powder, coconut fiber, stake, and sugar powder. 2. The filler material for artificial turf based on wood flour according to claim 1, wherein the wood flour exhibits a weight reduction rate of not more than 80 wt% at 450 DEG C in thermogravimetric analysis (TGA). delete The filling material for artificial turf grass according to claim 1, wherein the styrene polymer has a weight reduction rate of at least 99 wt% at 600 DEG C in thermogravimetric analysis (TGA). delete The filling material for green artificial grass according to claim 1, wherein the olefin-based polymer exhibits a weight reduction rate of at least 99 wt% at 600 ° C in thermogravimetric analysis (TGA). delete delete 2. The filler material for artificial turf grass according to claim 1, wherein the process oil exhibits a weight reduction rate of at least 99 wt% at 500 DEG C in thermogravimetric analysis (TGA). delete The filler material for artificial grass of claim 1, wherein the inorganic filler exhibits a weight reduction rate of 50 wt% or less at 800 ° C in thermogravimetric analysis (TGA). The filler material of claim 1, further comprising an ultraviolet stabilizer, wherein the ultraviolet stabilizer exhibits a weight loss rate of at least 99 wt% at 650 ° C in thermogravimetric analysis (TGA). delete delete delete

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