KR102288900B1 - Filling material for artificial turf derived from biomass and a method for manufacturing the same - Google Patents

Abstract

A filler for biomass-derived artificial turf according to an embodiment of the present invention includes: 15-30 wt% of a biomass-derived polymer composed of biomass-derived linear low-density polyethylene, natural wood flour and a compatibilizer; 10-30 wt% of a styrenic polymer; 5-15 wt% of an olefin-based resin; 10-30 wt% of process oil, and 5-40 wt% of an inorganic filler.

Description

Filling material for artificial turf derived from biomass and a method for manufacturing the same

The present invention relates to a filler for artificial turf derived from biomass and a method for manufacturing the same.

Artificial turf was first invented in 1965, and the first artificial turf stadium is provided in the form of green indoor and outdoor plastic carpets. It is widely used in sports stadiums, etc., and is widely used for various purposes such as gardens at home.

Currently, most of the professional sports stadiums still use natural turf. Two-thirds of the stadiums in the National Football League (NFL) are made of natural turf (20), and 11 stadiums are made of artificial turf. In the case of baseball fields, 4 out of 30 baseball fields are made of artificial turf.

In the 1980s, several North American and European soccer clubs tried to switch to artificial turf, but the record of returning to natural turf was again due to complaints from players and spectators due to the hard ground of artificial turf and bouncing that interrupted the game flow. In addition, FIFA (the Federation International de Football Association) permits the use of artificial turf stadiums, but international football teams are reluctant to play on artificial turf.

Today's artificial turf is an advanced form of plastic mats in the past, but artificial turf is just a mat with polyethylene fibers coated with silicone. and this filler is regularly replenished.

In addition, it has been reported that a large amount of hazardous substances such as heavy metals are being detected in artificial turf playgrounds in elementary, middle and high schools across the country, but in reality there is no management. The age (period of time required for renovation and repair) is also not properly observed.

Currently, there are about 1,600 artificial turf playgrounds installed in elementary, middle and high schools in Korea at the level of the country. Turf installations have begun, and a budget of 300 to 500 million won per school is being pursued with the goal of letting students run around on an artificial turf playground instead of a sandy soil. As it is constructed in a way that artificial turf is laid on top of the artificial turf, rubber granules of filler are laminated on the artificial turf to give elasticity and softness like natural turf.

However, if the rubber pellet filler contains a lot of polycyclic aromatic hydrocarbons (PAHs), a carcinogen, or a heavy metal, lead, it is exposed to students running on the grass as it is, causing a lot of health damage. Because fillers, including artificial turf, can come into contact with or be exposed to sunlight, the physical properties of most of the components that make up artificial turf are deteriorated by UV decomposition by sunlight. It is necessary to absorb the impact of the artificial turf, but as time passes, it crumbles and loses its proper filling function. There is a need for research and countermeasures to maintain the physical properties and increase durability.

Therefore, an environment that can reduce damage to harmful substances emitted from artificial turf and fillers to be installed on the playground, create a pleasant playground environment, increase public health and satisfaction, and realize budget savings through extension of the lifespan of artificial turf. There is a need for an artificial turf filler chip manufacturing technology that is friendly and provides functionality.

Looking at the technology related to the artificial turf filler manufacturing method in the prior art, Korean Patent Publication No. 10-1851681 suggests an eco-friendly color rubber chip manufacturing method using recycled rubber. pulverizing into rubber particles; separating the pulverized rubber particles by particle size; mixing the rubber particles separated by particle size with a thermosetting resin and a pigment and stirring; heating the stirred rubber particles, thermosetting resin and pigment to color the rubber particles; A step of coating the surface by mixing and stirring a UV stabilizer and a curing accelerator to the colored rubber particles; Heating and impregnating the surface-coated rubber particles with UV stabilizers and curing accelerators; cooling and drying the heat-impregnated rubber particles; A technique for applying a complex process including the step of applying a photocatalyst to the cooled and dried rubber particles is proposed. In addition, Korea Registration No. 10-1776948 describes a material mixing step of mixing EPDM, a filler, a heavy metal neutralizing agent and a vulcanizing agent with each other; a material forming step of forming the mixed material into a chip shape; recovering the molded product using a water pump and removing the remaining water; a first vulcanization step of vulcanizing the filler molded in the form of a chip only by hot air in a state where no pressure is applied; and a secondary vulcanization step of performing secondary vulcanization after completion of the primary vulcanization is proposed, and Korea Registration No. 10-1773146 is a wood flour matrix-based eco-friendly filler for artificial turf. , its manufacturing method, the composition for manufacturing the filler, and artificial turf-related technology including the filler, styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-butadiene-styrene with wood flour as the main component as an elastic body of artificial turf filler at least one styrenic polymer selected from copolymer (SBS), styrene-ethylene-propylene-styrene copolymer (SEPS), hydrogenated styrene-isoprene-butadiene copolymer (SEEPS), and styrene-isoprene-styrene copolymer (SIS) An elastomer comprising

However, since this prior art is not environmentally friendly, it is necessary to develop an environmentally friendly filler while maintaining physical properties of the filler such as durability and elastic recovery.

Registered Patent No. 10-1851681 (2018.05.10. Announcement) Registered Patent No. 10-1776948 (2017.09.19. Announcement) Registered Patent No. 10-1773146 (2017.09.05. Announcement)

The problem to be solved by the present invention is to provide a filler for artificial turf derived from biomass, which is environmentally friendly, and has excellent durability and elastic recovery by using wasted biomass and applying it to the filler for artificial turf.

The filler for biomass-derived artificial turf according to an embodiment of the present invention is 15 to 30% by weight of a biomass-derived polymer, 10 to 30% by weight of a styrenic polymer, 5 to 15% by weight of an olefin-based resin, and 10 to 30% by weight of a process oil % by weight, and 5-40% by weight of inorganic fillers.

The biomass-derived polymer may be at least one selected from the group consisting of biomass-derived linear low-density polyethylene, natural wood flour, and compatibilizers.

The biomass-derived linear low-density polyethylene is formed by copolymerizing biomass-derived polyethylene with 1-butene or 1-hexene-α-olefin, and may have a biobased carbon content of 84 to 87 wt%.

The biomass-derived linear low-density polyethylene may have a density of 0.916 to 0.950 g/cm ³ , and a melt index (MI) of 0.8 to 5.0 g/10min.

The filler may have a bio-based carbon content of 15% or more.

The natural wood flour may be prepared from at least one selected from the group consisting of conifers, hardwoods, and coconut fibers.

The natural wood powder may have a particle size of 20 to 80 mesh, and a length to diameter ratio of 3:1 to 5:1.

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

The process oil may be at least one selected from the group consisting of paraffinic, naphthenic, and aromatic process oils.

The inorganic filler may be at least one selected from the group consisting of calcium carbonate, activated carbon, and mica.

The compatibilizer may be at least one selected from the group consisting of maleic acid, maleic anhydride, maleic hydrazide, dichloro maleic anhydride, unsaturated dicarboxylic acid, fumaric acid, citric acid, citric anhydride, malic acid and agaric acid. can

The biomass-derived filler for artificial turf may further include 0.1 to 10 wt% of a color master batch and 0.1 to 10 wt% of an antioxidant.

A method for producing a biomass-derived filler for artificial turf according to another embodiment of the present invention comprises: preparing a biomass-derived polymer by mixing a biomass-derived linear low-density polyethylene, natural wood flour, and a compatibilizer; preparing a mixture by mixing the biomass-derived polymer, a styrenic polymer, a polyolefin resin, a process oil, and an inorganic filler; Putting the mixture into an extruder and extruding to prepare a filler; and cutting the filler in a predetermined shape in water to prepare a granular filler.

By using the biomass-derived filler for artificial turf and the method for manufacturing the same according to the present invention, the biomass-derived artificial turf having excellent abrasion resistance and elastic recovery as well as eco-friendly by applying the discarded biomass to the filler for artificial turf There is an advantage of providing a filler.

In addition, there is an advantage of contributing to the reduction of carbon dioxide in the global environment due to the expansion of fillers to which biomass-derived materials are applied by replacing petroleum-derived polymer materials.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in the drawings, the same components or parts are denoted by the same reference numerals as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the gist of the present invention.

As used herein, the terms about, substantially, etc., are used in a sense at or close to the numerical value when the manufacturing and material tolerances inherent in the stated meaning are presented, and are not used precisely or precisely to aid the understanding of the present invention. Absolute figures are used to prevent unreasonable exploitation of the stated disclosure by unscrupulous infringers.

As a result of repeated research to develop a filler for artificial turf that is environmentally friendly as it replaces rubber chips and does not leak harmful substances such as heavy metals, and has excellent durability and resilience, biomass-derived polymers, styrenic polymers, olefins By including a resin-based resin, a process oil, and an inorganic filler in a specific content, it was discovered that it is possible to provide a filler for artificial turf that is environmentally friendly, has excellent durability and elasticity, and led to the present invention.

Accordingly, the filler for biomass-derived artificial turf according to an embodiment of the present invention is 15 to 30% by weight of a biomass-derived polymer, 10 to 30% by weight of a styrene-based polymer, 5 to 15% by weight of an olefin-based resin, and 10% by weight of a process oil -30% by weight, and 5-40% by weight of inorganic fillers.

15 to 30% by weight of a biomass-derived polymer, 10 to 30% by weight of a styrenic polymer, 5 to 15% by weight of an olefinic resin, 10 to 30% by weight of a process oil, and 5 to 40% by weight of an inorganic filler.

The biomass-derived polymer may be at least one selected from the group consisting of biomass-derived linear low-density polyethylene, natural wood flour, and compatibilizers.

The biomass-derived linear low-density polyethylene is formed by copolymerizing biomass-derived polyethylene (Bio-polyethylene) and 1-butene or 1-hexene-α-olefin, and may have a bio-based carbon content of 84 to 87 wt%.

Biomass-derived polyethylene used in the present invention is sugar cane, paper, paper products, waste paper, wood, particle board, sawdust, agricultural waste, sewage, silage, grass, rice husk, bagasse, cotton, jute, hemp, flax, bamboo , sisal, manila ginseng, straw, corncob, corn fodder, hornwort, alfalfa, hay, rice husk, coconut hair, cotton, seaweed, algae, and mixtures thereof may be at least one selected from the group consisting of.

The biomass-derived polyethylene is produced by fermenting starch or sugar obtained from the biomass with a microorganism to produce ethanol, dehydrating the ethanol to produce ethylene, and polymerizing the ethylene. manufactured.

Unlike conventional petroleum-based materials, the biomass-derived polyethylene has low generation of volatile organic compounds and is therefore environmentally friendly.

In addition, unlike the conventional petroleum-based polyethylene that produces polyethylene while emitting carbon dioxide, the biomass-derived polyethylene has the advantage of less carbon dioxide generation and replaces conventional polyethylene because it exhibits similar physical properties to petroleum-based polyethylene. can do.

The density of the biomass-derived linear low-density polyethylene formed by polymerization of the biomass-derived polyethylene and 1-butene-α-olefin or 1-hexene-α-olefin is 0.916 to 0.950 g/cm ³ , and a melt index (MI) of 0.8 ~5.0 g/10 min.

The biomass-derived polymer of the biomass-derived linear low-density polyethylene, natural wood flour, and compatibilizer may be mixed in a weight ratio of 1:0.5 to 1.5:0.05 to 0.2.

When the natural wood powder is mixed in an amount of less than 0.5 weight ratio, there is a problem that the characteristic properties of natural wood powder cannot be exhibited. desirable.

In addition, when the compatibilizer is less than 0.05, it is not easy to mix between the raw materials, so durability may be lowered. The above ranges are preferred.

The natural wood powder may be prepared from at least one selected from the group consisting of softwood, hardwood, and coconut fiber.

The natural wood powder may have a particle size of 20 to 80 mesh, and a length to diameter ratio of 3:1 to 5:1.

If the particle size of the natural wood powder is less than 20 Mesh, it is difficult to disperse and has a non-uniform distribution. If it exceeds 80 Mesh, there is a problem in that extrusion failure occurs during processing, so the above range is preferable.

The compatibilizer may be at least one selected from the group consisting of maleic acid, maleic anhydride, maleic acid hydrazide, dichloro maleic anhydride, unsaturated dicarboxylic acid, fumaric acid, citric acid, citric acid anhydride, malic acid and agaric acid. .

The content of the biomass-derived polymer may include 15 to 30% by weight, preferably 18 to 25% by weight, based on 100% by weight of the filler. If the content of the biomass-derived polymer is less than 15% by weight, durability may be reduced because it cannot form a network with other raw materials, and if it exceeds 30% by weight, strength and heat resistance performance are excellent, but melt balance problems and dispersibility This lowers the production efficiency, and it is difficult to expect performance improvement compared to the manufacturing cost.

The olefin-based resin may be a curable polymer that determines the hardness of the filler. In addition, the olefin-based resin is one of the curable polymers that determine the hardness, and is used to impart light resistance, fluidity, internal resistance, and mechanical properties to the filler.

The type of the olefin-based resin is not limited, but may preferably be polypropylene.

In order to satisfy the artificial turf system quality standard of A-1 grade according to the artificial turf KS M 3888-1:2013 system quality standard, the content of the olefin-based resin is 5 to 15% by weight based on 100% by weight of the filler. may be included, preferably 7 to 10% by weight. If the content of the olefin-based resin is less than 5% by weight, the hardness of the filler may be lowered, such as durability, and if it exceeds 15% by weight, the filler does not have soft elasticity and becomes hard, and the safety performance, such as shock absorption, may be reduced. can

The styrenic polymer provides elasticity and resilience to the filler, and functions as an elastic polymer in the filler of the present invention. In addition, the styrene-based polymer is styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-butadiene-styrene copolymer (SBS), styrene-ethylene-propylene-styrene copolymer (SEPS), hydrogenated styrene-isoprene-butadiene It may be at least one selected from the group consisting of a copolymer (SEEPS) and a styrene-isoprene-styrene copolymer (SIS), and preferably a styrene-ethylene-butadiene-styrene copolymer (SEBS).

The styrene-ethylene-butadiene-styrene (SEBS) is a material that can implement the most similar physical properties to natural rubber, absorbs the process oil, and has compatibility with an olefin-based resin.

Specifically, the styrene-ethylene-butadiene-styrene (SEBS) provides elasticity and resilience, and since it has a block structure itself, it serves to prevent cross-linking during mixing (compounding). The styrene-ethylene-butadiene-styrene (SEBS) is a three-dimensional structure composed of ethylene-butadiene soft segments connected between styrene hard segments and heavy segments at both ends. The styrene-ethylene-butadiene-styrene (SEBS) has a two-phase structure in which a hard segment and a soft segment are phase-separated. The styrene hard segment is a crystalline region that does not mix with the ethylene-butadiene soft segment, which is an amorphous region, physically crosslinks at room temperature, imparts mechanical properties (eg, tensile strength), and has a glass transition temperature (Tg) of about 100 is °C. The ethylene-butadiene soft segment is a hydrophobic, amorphous region that absorbs process 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 due to different solubility parameters (styrene - 9.1, ethylene-butadiene -7.76), and since the degree of phase separation affects mechanical properties, rheological properties, and heat resistance, the degree of phase separation is large. it is advantageous

The content of the styrenic polymer may include 10 to 30% by weight, preferably 20 to 25% by weight, based on 100% by weight of the filler. If the content of the styrenic polymer is less than 10% by weight, elasticity, abrasion resistance, durability, etc. may be reduced, and if it exceeds 30% by weight, it is difficult to expect improvement in performance compared to manufacturing cost.

The process oil is added to secure processability during high-temperature extrusion and to secure mixing and uniformity between raw materials, and the process oil may be at least one selected from the group consisting of paraffinic, naphthenic, and aromatic process oils.

The paraffinic oil may improve the flow (flow) and color stability of the filler. However, when using more than an appropriate amount, durability problems (shape deformation) occur, and when exposed to the outdoors for a long time, shape distortion and agglomeration may occur due to oil bleeding, etc., and may cause fatal problems in heat resistance.

The content of the process oil may include 10 to 30% by weight, preferably 20 to 25% by weight, based on 100% by weight of the filler. If the content of the process oil is less than 10% by weight, there is a problem in processing due to poor fluidity, and if it exceeds 30% by weight, a problem of oil bleeding may occur.

The inorganic filler is added to secure stability of the filler, increase oil absorbency, and perform an appropriate elastic function, and may be at least one selected from the group consisting of calcium carbonate, activated carbon and mica.

The content of the inorganic filler may include 5 to 40% by weight, preferably 10 to 30% by weight, based on 100% by weight of the filler. If the content of the inorganic filler is less than 5% by weight, physical properties such as tensile strength may be reduced, and if it exceeds 40% by weight, it is difficult to implement the desired performance as an inorganic material such as abrasion resistance, durability, shape deformation, and elasticity.

The filler may further include a color master batch and an anti-aging agent, each of which may be included in an amount of 0.1 to 10% by weight, preferably 0.5 to 5% by weight, based on 100% by weight of the filler. The type of the color master batch and the anti-aging agent is not particularly limited, and a conventional one may be used.

The filler according to an embodiment of the present invention may have a bio-based carbon content of 15% or more.

A method for producing a biomass-derived filler for artificial turf according to another embodiment of the present invention comprises the steps of: mixing biomass-derived linear low-density polyethylene, wood flour, and a compatibilizer, and preparing a biomass-derived polymer; preparing a mixture by mixing the biomass-derived polymer, a styrenic polymer, a polyolefin resin, a process oil, and an inorganic filler; Putting the mixture into an extruder and extruding to prepare a filler; and cutting the filler in a predetermined shape in water to prepare a granular filler.

The step of mixing the biomass-derived linear low-density polyethylene, wood flour, and compatibilizer and preparing a biomass-derived polymer is a step for preparing pellets by mixing the biomass-derived linear low-density polyethylene, wood flour and compatibilizer.

When manufactured in the form of pellets, the extrusion temperature may be carried out at 200 to 230 °C, preferably at 210 to 220 °C.

If the injection temperature is less than 200 ℃, there is a problem in workability because the linear low-density polyethylene, wood flour, and compatibilizer are not mixed, and if it exceeds 230 ℃, there is a problem of carbonization, and the above range is preferable.

The step of preparing a mixture by mixing the biomass-derived polymer, styrenic polymer, polyolefin resin, process oil and inorganic filler is a step for mixing the main raw materials, and a color master batch and an antioxidant may be further mixed.

The mixing method is not limited, and if it is a method in which all the inputted raw materials can be sufficiently dispersed, it is not limited.

Putting the mixture into an extruder, and extruding to prepare a filler may be performed at 200 ~ 230 ℃.

Thereafter, the extruded filler may be cut in water in a predetermined shape to prepare a granular filler.

In the present invention, the mixing, extrusion, cutting, etc. may be performed by arbitrarily selected means widely known in the art to which the present invention pertains.

The filler according to the present invention may have a particle size of an average diameter of 1.4 to 3.35 mm, and if the size of the filler is less than 1.4 mm, the efficacy as a filler is lowered and the buffer effect is not expressed, so joints such as knees during exercise It is easy to damage the skin, the surface may be composed of a slippery surface, and there is a risk that fine dust is scattered into the air during the manufacturing process and inhaled into the respiratory tract of the human body. In addition, when the size of the filler exceeds 3.35 mm, the filling effect is not exerted, it is difficult to apply the filler to the artificial turf, and the surface is formed rough, so that the user of the artificial turf may suffer skin damage when he falls.

In addition, in the biomass-derived artificial turf filler according to the present invention, since the particles of the eco-friendly artificial turf filler are formed in an oval shape and have a uniform size, no dust is generated due to mechanical friction, the friction coefficient is also smaller, and the elasticity This can increase.

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

Example 1

First, biomass-derived linear low-density polyethylene formed by polymerization of biomass-derived polyethylene (Bio-polyethylene) and α-olefin (α-Olefin) was purchased and prepared.

Next, biomass-derived linear low-density polyethylene, natural wood flour, and maleic anhydride were introduced into an extruder in a weight ratio of 1:1:0.2 and extruded at 210° C. to prepare a biomass-derived polymer.

Then, based on 100% by weight of the filler, 30% by weight of a biomass-derived polymer, 20% by weight of styrene-ethylene-butadiene-styrene (SEBS) and 5% by weight of a polypropylene resin were mixed with a process oil (paraffin oil) 15% by weight, calcium carbonate (CaCO ₃ ) 25% by weight, 2.5% by weight of the color master batch, and 2.5% by weight of an antioxidant (TINUVIN 405) were mixed and put into the extruder.

Then, it was molded by extrusion at a temperature of 220° C. using an extruder. Simultaneously with the extrusion, the extrusion-molded compound was cooled with air and cut to a size of 1.4 to 3.35 mm in diameter to prepare a cylindrical biomass-derived filler for artificial turf.

Example 2

In the same manner as in Example 1, a biomass-derived polymer was prepared in a weight ratio of 1:0.5:0.2 weight ratio of biomass-derived linear low-density polyethylene, natural wood flour, and maleic anhydride, and a filler was prepared.

Example 3

In the same manner as in Example 1, a biomass-derived polymer was prepared in a weight ratio of 1:1.5:0.2 weight ratio of biomass-derived linear low-density polyethylene, natural wood flour, and maleic anhydride, and a filler was prepared.

Example 4

The same procedure as in Example 1 was performed, but based on 100 wt% of the filler, 25 wt% of a biomass-derived polymer was added, and 25 wt% of styrene-ethylene-butadiene-styrene (SEBS) was added to prepare a filler.

Example 5

The same procedure as in Example 1 was performed, but based on 100 wt% of the filler, 23 wt% of a biomass-derived polymer was added, and 27 wt% of styrene-ethylene-butadiene-styrene (SEBS) was added to prepare a filler.

Example 6

It was carried out in the same manner as in Example 1, but based on 100% by weight of the filler, 20% by weight of a biomass-derived polymer was added, and 30% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to prepare a filler.

comparative example

A filler was prepared in the same manner as in Example 1, except that 50% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added without adding a biomass-derived polymer based on 100% by weight of the filler.

Experimental Example 1

The physical properties of the fillers for artificial turf prepared in Examples 1 to 6 and Comparative Examples were evaluated.

The artificial turf mat (pile length: 55 mm) was filled with silica sand 25 kg/m 2 and the fillers 11 kg/m 2 prepared in Examples 1 to 6 and Comparative Examples in the order of silica sand and filler, and piled at the upper end of the filler. The artificial turf system was manufactured by distributing it so that it was 17 mm to the end of the yarn.

The hardness and heat resistance of the artificial turf filler were measured by extruding the filler into a specimen having a thickness of 5 mm, and durability, abrasion resistance and shock absorption were measured by constructing an artificial turf system.

(Hardness: Put the specimen at a distance of 10 mm or more and press manual Shore A for 5 seconds to check the indicated value. Taber abrasion (in condition): Measure the weight change after 1,000 times of wear with the Taber wear equipment (H18 wear ring), Taber abrasion resistance (rate of change after heat resistance): After leaving the specimen in an experimental oven at 100°C for 5 days, after stabilizing at room temperature for 1 day, after the abrasion resistance test, comparison of the results and the rate of change, stud wear durability: artificial using LISPORT stud wear equipment After each 30,000 times of wear of the turf system, observation of the appearance of the filler material, shock absorption after stud wear: After each 30,000 times of wear of the artificial turf system using LISPORT stud wear equipment, measure the impact absorption rate after brushing the surface evenly)

Table 1 below shows the results of measuring hardness, heat resistance, durability, abrasion resistance and shock absorption

division Hardness Abrasion resistance (1,000 tabers) Abrasion resistance (Lisport 30,000 times) weight change
(%loss in state) heat resistance
(Leave high temperature
after %loss) Shock absorption (%) durability
(Change in appearance of filler) Example 1 66 -1.2 -2.2 42 Good Example 2 66 -1.4 -2.1 41 Good Example 3 66 -1.0 -2.0 43 Good Example 4 66 -0.8 -1.5 43 Good Example 5 65 -1.5 -2.7 41 Good Example 6 65 -2.0 -3.0 40 Good comparative example 62 -8.0 -14.3 34 crushed

As can be seen in Table 1, it can be confirmed that Examples 1 to 6 to which the biomass-derived polymer is added are superior in all physical properties to Comparative Examples, and in particular, Example 3 is the most excellent.

Therefore, when the biomass-derived filler for artificial turf of the present invention is used, it can be confirmed that discarded biomass is used, and thus, it is environmentally friendly and has superior properties than the existing filler.

Experimental Example 2

Pb, Cd, Cr, and Hg were measured in order to check whether the quality standards for the use of the biomass-derived artificial turf filler prepared in Examples 1 to 6 were suitable.

Pb, Cd, Cr are measured and analyzed using an inductively coupled plasma emission spectrometer (Model: OPTIMA 7300 DV, OPTIMA 3300 DV, Perkin-Elmer (USA)), and Hg is measured and analyzed using a mercury analyzer (Model: DMA-80, Milestone) was carried out.

division Pb CD Cr Hg Example 1 ND ND ND ND Example 2 ND ND ND ND Example 3 ND ND ND ND Example 4 ND ND ND ND 5 in practice ND ND ND ND Example 6 ND ND ND ND

* Heavy metal standard: Pb 90 or less (KS R1301: 2006), Cd 50 or less (KS R1301: 2006), Cr6 25 or less (USEPA 3052: 1996), Hg 25 or less (USEPA 3060A: 1996) As can be seen, in Examples 1 to 6 prepared according to the present invention, heavy metals were not detected, and it can be confirmed that they are harmless to the human body.

As can be seen from the above results, by using the biomass-derived filler for artificial turf and the manufacturing method thereof according to the present invention, discarded biomass is applied to the filler for artificial turf, which is environmentally friendly as well as abrasion resistance and elastic recovery There is an advantage in that this excellent biomass-derived artificial turf filler can be provided.

In addition, there is an advantage of contributing to the reduction of carbon dioxide in the global environment due to the expansion of fillers to which biomass-derived materials are applied by replacing petroleum-derived polymer materials.

The preferred embodiment of the present invention has been described in detail above. The description of the present invention is for illustrative purposes, and those skilled in the art to which the present invention pertains will understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention.

Accordingly, the scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning, scope, and equivalent concept of the claims are included in the scope of the present invention. should be interpreted

Claims (13)

15-30% by weight of biomass-derived polymer,
10 to 30% by weight of a styrenic polymer;
5 to 15% by weight of an olefin-based resin;
10-30% by weight of process oil, and
As a filler comprising 5 to 40% by weight of an inorganic filler,
The biomass-derived polymer is composed of a biomass-derived linear low-density polyethylene having a density of 0.916 to 0.950 g/cm3 and a melt index (MI) of 0.8 to 5.0 g/10min, natural wood flour and a compatibilizer, and the linear low-density polyethylene; Natural wood flour and compatibilizer are mixed in a weight ratio of 1:0.5 to 1.5:0.05 to 0.2,
The biomass-derived linear low-density polyethylene,
Biomass-derived polyethylene and 1-butene or 1-hexene-α-olefin are copolymerized so that the carbon content of the biobase is 84 to 87% by weight,
The natural wood flour has a particle size of 20 to 80 mesh and a length to diameter ratio of 3:1 to 5:1,
The filler is characterized in that the bio-based carbon content is 15% or more,
Filling material for artificial turf derived from biomass.
delete delete delete delete According to claim 1,
The natural wood powder,
Characterized in that it is made of at least one selected from the group consisting of softwood, hardwood, and coconut fiber,
Filling material for artificial turf derived from biomass.
delete According to claim 1,
The styrenic polymer is
Styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-butadiene-styrene copolymer (SBS), styrene-ethylene-propylene-styrene copolymer (SEPS), hydrogenated styrene-isoprene-butadiene copolymer (SEEPS) and styrene -Isoprene-styrene copolymer (SIS) characterized in that at least one selected from the group consisting of,
Filling material for artificial turf derived from biomass.
According to claim 1,
The process oil is
Characterized in that at least one selected from the group consisting of paraffinic, naphthenic and aromatic process oils,
Filling material for artificial turf derived from biomass.
According to claim 1,
The inorganic filler is
Characterized in that at least one selected from the group consisting of calcium carbonate, activated carbon and mica,
Filling material for artificial turf derived from biomass.
According to claim 1,
The compatibilizer is
It is characterized in that at least one member selected from the group consisting of maleic acid, maleic anhydride, maleic hydrazide, dichloro maleic anhydride, unsaturated dicarboxylic acid, fumaric acid, citric acid, citric anhydride, malic acid and agaric acid,
Filling material for artificial turf derived from biomass.
According to claim 1,
The biomass-derived artificial turf filler further comprises 0.1 to 10 wt% of a color master batch and 0.1 to 10 wt% of an antioxidant,
Filling material for artificial turf derived from biomass.
delete